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LATEST NEWS UPDATES | Simple & cheap solution to India's grave water crisis: Waste water recycling-Sanjay Vijayakumar </title>
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-The Economic Times
Where will India get its water from in the coming years? The water challenge is already grave and could get graver. By 2050, for instance, it is estimated that demand would go up to 1,180 million cubic metres,..."/>
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Where will India get its water from in the coming years? The water challenge is already grave and could get graver. By 2050, for instance, it is estimated that demand would go up to 1,180 million cubic metres,..." />
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<h1 class="cat-box-title">Simple & cheap solution to India's grave water crisis: Waste water recycling-Sanjay Vijayakumar</h1>
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<div style="text-align: justify">-The Economic Times</div><div style="text-align: justify"><br /></div><div style="text-align: justify">Where will India get its water from in the coming years? The water challenge is already grave and could get graver. By 2050, for instance, it is estimated that demand would go up to 1,180 million cubic metres, 1.65 times the current levels, a situation that would be made worse by fast dwindling fresh water resources.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">That's why desalination — removing salt from seawater to make fresh water — is increasingly catching the fancy of administrators. Two of India's most industrialised states, Tamil Nadu and Gujarat, are the keenest among the lot. A water-scarce Tamil Nadu, already running one desalination plant, is working to complete a second plant and planning for the third. Gujarat is also said to have desalination plans.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">"The industrial sector's preference toward desalination is expected to increase with the growing demand for processed water. Many of the coastal municipalities are also keenly looking to invest in desalination," says consultancy Frost & Sullivan's environment technologies expert Sasidhar Chidanamarri. India, along with the US and China, is seen contributing quite a bit to a global doubling of desalination capacity between 2010 and 2025, says Frost & Sullivan. Of course, the biggest contributor would be West Asia, which would by then account for half the world capacity.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">But the question that experts are increasingly asking, at a time when a draft water policy is being debated, is this: is desalination the best option?</div><div style="text-align: justify"><br /></div><div style="text-align: justify"><em>Treating Waste Water</em></div><div style="text-align: justify"><br /></div><div style="text-align: justify">Countries the world over, while being bullish about desalination, are equally bullish about other means, notably waste water recycling. Not India. Only about 31% of municipal wastewater can be recycled. That would be more than 75% in China. In a recent working paper titled "Water Supply in Chennai: Desalination and Missed Opportunities", researcher Sridhar Vedachalam of the New York State Water Resources Institute at Cornell University wrote that "desalination may provide a reliable supply of water to a city with chronic water shortage, but it is hardly the best option for more than one reason".</div><div style="text-align: justify"><br /></div><div style="text-align: justify">"Desalination, while being a source of fresh water, does nothing to address the challenge of managing those extra million litres of wastewater," says Vedachalam. "Recycled water, on the other hand, solves the twin problems in a single shot."</div><div style="text-align: justify"><br /></div><div style="text-align: justify">When Tamil Nadu launched its first desalination plant in 2010, at Minjur, 27 km from north of Chennai, the benefits seemed apparent. Tamil Nadu's water challenge is historically well chronicled. Now, it houses 6% of the country's population but only has 3% of its water resources. Also, Tamil Nadu gets an annual rainfall of 792 million metres versus the national average of 1,250 million metres. The per capita availability at 800 cubic metres in the state is just a third of the national average.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">"Why not go further and pick a more futuristic technology — one that addresses problems of water supply and wastewater management, is ecologically compatible — and lead the way for the rest of the country and even the world. Reuse can be implemented anywhere (not just in coastal areas) and, therefore, has a much bigger market allowing future improvements in technology and reduction in cost," says Vedachalam.</div><div style="text-align: justify"><br /></div><div style="text-align: justify"><em>Rs 25/litre Difference</em></div><div style="text-align: justify"><br /></div><div style="text-align: justify">For Sam Yamdagni, managing director of the Indian arm of the $3.8-billion US-based water technology company Xylem, there is no way waste water treatment can be missed. "Even when you are creating water through desalination, you have to look at creating waste water treatment because again you are going to generate waste."</div><div style="text-align: justify"><br /></div><div style="text-align: justify">But ecological compatibility isn't the only reason. There's a compelling cost reason favouring waste water treatment.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">R Raghuttama Rao, managing director of Icra Management Consulting Services, points out those cases. He says, "Desal is more expensive upwards of Rs 50 per kilo litre compared to Rs 25-35 per kilo litre for recycled sewage. Desal requires more power and is energy intensive."</div><div style="text-align: justify"><br /></div><div style="text-align: justify">Chidanamarri estimates the capex for desalination plants to be two-and-a-half times that of a conventional treatment technology. "Clearly, desalination is an expensive proposition. And the government is contemplating to offer tax incentives for industries which would help them in recovering the high costs." (He also points out, though, that improved technologies have over the years brought down the cost of water from desalination.)</div><div style="text-align: justify"><br /></div><div style="text-align: justify">Given this, Vedachalam had argued in his analysis, "Reliance on such expensive technology [desalination] does not augur well for a city [Chennai] that already does not collect revenues that match its expenses." A report in 2005 estimated that only a fifth of the water sold in Chennai was metered. The rest of the country may not be vastly different in this respect.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">Data supports this view. According to a presentation available on the Ministry of Urban Development Website, the average cost of wastewater treatment is Rs 4.5-6 a kilo litre, and this can be used for agriculture or gardening purposes. If treated for drinking use, the cost does jump to Rs 12 but this is still far less than what metros in India spend to bring potable water to its residents. Here are the numbers: from Rs 20 per kilo litre in Delhi to Rs 40-60 in Chennai.</div><div style="text-align: justify"><br /></div><div style="text-align: justify"><em>Perception Problems</em></div><div style="text-align: justify"><br /></div><div style="text-align: justify">The other significant side of the story is India's growing demand for water. Nowhere is this as evident as in the industrial sector, which now consumes about 50 billion cubic metres of water annually. That figure will jump to 120 billion cubic metres by 2025, says Frost's Chidanamarri.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">Given this, going in for waste water recycling aggressively should be a no-brainer. But that's not been the case. There's a reason why the actual scope for use of recycled water is far less. "From a mindset perspective, people are more ready to drink desalination water relative to treated waste-water," says Icra's Rao. </div><div style="text-align: justify"><br /></div><div style="text-align: justify">Rajiv Mittal, managing director of water treatment company VA Tech Wabag, agrees about the mindset issue. "In Singapore, the prime minister of Singapore campaigned for safety of recycled water for drinking and he was the first one to use this." Mittal says in Singapore they call it reusable water, not waste water.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">Icra's Rao says indirect potable use (where recycled treated sewage water is pumped into water bodies/river streams which is conventionally treated again) is becoming more popular. Singapore already does this. Bangalore was planning such a project but that has not happened so far, he says.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">But the low-hanging fruit in waste water isn't in challenging strong perceptions of the people but actually is in the industrial sector. Already, there are examples of treated sewage being used by industries in India. In Chennai alone, wastewater is supplied to companies such as Madras Refineries, Madras Fertilisers and GMR Vasavi Power for reclamation and reuse.</div><div style="text-align: justify"><br /></div><div style="text-align: justify"><em>Thirsty Industry</em></div><div style="text-align: justify"><br /></div><div style="text-align: justify">The industrial potential is already evident through desalination. VA Tech's Mittal knows that well. His company is the one building the second desalination plant in Chennai, some 45 km away at Nemelli. It is eyeing a big opportunity in the desalination space. Between 2005 and 2010, about 63% of the 5.3 lakh cubic metres per day of desalination capacity was accounted for by the industry. The municipal segment accounted for the rest.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">He reckons the way to go about it is this: waste water treatment for industrial use and desalination for domestic use. Europe does it well. It recycles about 60% of the domestic sewage generated and it is consumed for non-potable applications such as boiler feed water, cooling tower, landscaping, gardening and flushing.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">Anand Chiplunkar, a director of urban development at the Asian Development Bank, says, "Wastewater treatment can generate revenues and thereby not only reduce the operating and maintenance costs but also recover capital costs [when recycled to industries]." Therefore, he says, "it has the potential to attract private sector investments in properly structure projects".</div><div style="text-align: justify"><br /></div><div style="text-align: justify">Rao says, "Waste-water recycling would be particularly attractive to address requirements of industrial use, if the demand is concentrated [eg SEZs]." That's one way to meet India's growing water needs.</div>
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<br><a href="http://economictimes.indiatimes.com/news/politics/nation/simple-cheap-solution-to-indias-grave-water-crisis-waste-water-recycling/articleshow/16507206.cms" class="re" target="_blank">The Economic Times, 23 September, 2012, http://economictimes.indiatimes.com/news/politics/nation/simple-cheap-solution-to-indias-grave-water-crisis-waste-water-recycling/articleshow/16507206.cms</a><div class="clear"></div>
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LATEST NEWS UPDATES | Simple & cheap solution to India's grave water crisis: Waste water recycling-Sanjay Vijayakumar </title>
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<h1 class="cat-box-title">Simple & cheap solution to India's grave water crisis: Waste water recycling-Sanjay Vijayakumar</h1>
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<div style="text-align: justify">-The Economic Times</div><div style="text-align: justify"><br /></div><div style="text-align: justify">Where will India get its water from in the coming years? The water challenge is already grave and could get graver. By 2050, for instance, it is estimated that demand would go up to 1,180 million cubic metres, 1.65 times the current levels, a situation that would be made worse by fast dwindling fresh water resources.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">That's why desalination — removing salt from seawater to make fresh water — is increasingly catching the fancy of administrators. Two of India's most industrialised states, Tamil Nadu and Gujarat, are the keenest among the lot. A water-scarce Tamil Nadu, already running one desalination plant, is working to complete a second plant and planning for the third. Gujarat is also said to have desalination plans.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">"The industrial sector's preference toward desalination is expected to increase with the growing demand for processed water. Many of the coastal municipalities are also keenly looking to invest in desalination," says consultancy Frost & Sullivan's environment technologies expert Sasidhar Chidanamarri. India, along with the US and China, is seen contributing quite a bit to a global doubling of desalination capacity between 2010 and 2025, says Frost & Sullivan. Of course, the biggest contributor would be West Asia, which would by then account for half the world capacity.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">But the question that experts are increasingly asking, at a time when a draft water policy is being debated, is this: is desalination the best option?</div><div style="text-align: justify"><br /></div><div style="text-align: justify"><em>Treating Waste Water</em></div><div style="text-align: justify"><br /></div><div style="text-align: justify">Countries the world over, while being bullish about desalination, are equally bullish about other means, notably waste water recycling. Not India. Only about 31% of municipal wastewater can be recycled. That would be more than 75% in China. In a recent working paper titled "Water Supply in Chennai: Desalination and Missed Opportunities", researcher Sridhar Vedachalam of the New York State Water Resources Institute at Cornell University wrote that "desalination may provide a reliable supply of water to a city with chronic water shortage, but it is hardly the best option for more than one reason".</div><div style="text-align: justify"><br /></div><div style="text-align: justify">"Desalination, while being a source of fresh water, does nothing to address the challenge of managing those extra million litres of wastewater," says Vedachalam. "Recycled water, on the other hand, solves the twin problems in a single shot."</div><div style="text-align: justify"><br /></div><div style="text-align: justify">When Tamil Nadu launched its first desalination plant in 2010, at Minjur, 27 km from north of Chennai, the benefits seemed apparent. Tamil Nadu's water challenge is historically well chronicled. Now, it houses 6% of the country's population but only has 3% of its water resources. Also, Tamil Nadu gets an annual rainfall of 792 million metres versus the national average of 1,250 million metres. The per capita availability at 800 cubic metres in the state is just a third of the national average.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">"Why not go further and pick a more futuristic technology — one that addresses problems of water supply and wastewater management, is ecologically compatible — and lead the way for the rest of the country and even the world. Reuse can be implemented anywhere (not just in coastal areas) and, therefore, has a much bigger market allowing future improvements in technology and reduction in cost," says Vedachalam.</div><div style="text-align: justify"><br /></div><div style="text-align: justify"><em>Rs 25/litre Difference</em></div><div style="text-align: justify"><br /></div><div style="text-align: justify">For Sam Yamdagni, managing director of the Indian arm of the $3.8-billion US-based water technology company Xylem, there is no way waste water treatment can be missed. "Even when you are creating water through desalination, you have to look at creating waste water treatment because again you are going to generate waste."</div><div style="text-align: justify"><br /></div><div style="text-align: justify">But ecological compatibility isn't the only reason. There's a compelling cost reason favouring waste water treatment.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">R Raghuttama Rao, managing director of Icra Management Consulting Services, points out those cases. He says, "Desal is more expensive upwards of Rs 50 per kilo litre compared to Rs 25-35 per kilo litre for recycled sewage. Desal requires more power and is energy intensive."</div><div style="text-align: justify"><br /></div><div style="text-align: justify">Chidanamarri estimates the capex for desalination plants to be two-and-a-half times that of a conventional treatment technology. "Clearly, desalination is an expensive proposition. And the government is contemplating to offer tax incentives for industries which would help them in recovering the high costs." (He also points out, though, that improved technologies have over the years brought down the cost of water from desalination.)</div><div style="text-align: justify"><br /></div><div style="text-align: justify">Given this, Vedachalam had argued in his analysis, "Reliance on such expensive technology [desalination] does not augur well for a city [Chennai] that already does not collect revenues that match its expenses." A report in 2005 estimated that only a fifth of the water sold in Chennai was metered. The rest of the country may not be vastly different in this respect.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">Data supports this view. According to a presentation available on the Ministry of Urban Development Website, the average cost of wastewater treatment is Rs 4.5-6 a kilo litre, and this can be used for agriculture or gardening purposes. If treated for drinking use, the cost does jump to Rs 12 but this is still far less than what metros in India spend to bring potable water to its residents. Here are the numbers: from Rs 20 per kilo litre in Delhi to Rs 40-60 in Chennai.</div><div style="text-align: justify"><br /></div><div style="text-align: justify"><em>Perception Problems</em></div><div style="text-align: justify"><br /></div><div style="text-align: justify">The other significant side of the story is India's growing demand for water. Nowhere is this as evident as in the industrial sector, which now consumes about 50 billion cubic metres of water annually. That figure will jump to 120 billion cubic metres by 2025, says Frost's Chidanamarri.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">Given this, going in for waste water recycling aggressively should be a no-brainer. But that's not been the case. There's a reason why the actual scope for use of recycled water is far less. "From a mindset perspective, people are more ready to drink desalination water relative to treated waste-water," says Icra's Rao. </div><div style="text-align: justify"><br /></div><div style="text-align: justify">Rajiv Mittal, managing director of water treatment company VA Tech Wabag, agrees about the mindset issue. "In Singapore, the prime minister of Singapore campaigned for safety of recycled water for drinking and he was the first one to use this." Mittal says in Singapore they call it reusable water, not waste water.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">Icra's Rao says indirect potable use (where recycled treated sewage water is pumped into water bodies/river streams which is conventionally treated again) is becoming more popular. Singapore already does this. Bangalore was planning such a project but that has not happened so far, he says.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">But the low-hanging fruit in waste water isn't in challenging strong perceptions of the people but actually is in the industrial sector. Already, there are examples of treated sewage being used by industries in India. In Chennai alone, wastewater is supplied to companies such as Madras Refineries, Madras Fertilisers and GMR Vasavi Power for reclamation and reuse.</div><div style="text-align: justify"><br /></div><div style="text-align: justify"><em>Thirsty Industry</em></div><div style="text-align: justify"><br /></div><div style="text-align: justify">The industrial potential is already evident through desalination. VA Tech's Mittal knows that well. His company is the one building the second desalination plant in Chennai, some 45 km away at Nemelli. It is eyeing a big opportunity in the desalination space. Between 2005 and 2010, about 63% of the 5.3 lakh cubic metres per day of desalination capacity was accounted for by the industry. The municipal segment accounted for the rest.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">He reckons the way to go about it is this: waste water treatment for industrial use and desalination for domestic use. Europe does it well. It recycles about 60% of the domestic sewage generated and it is consumed for non-potable applications such as boiler feed water, cooling tower, landscaping, gardening and flushing.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">Anand Chiplunkar, a director of urban development at the Asian Development Bank, says, "Wastewater treatment can generate revenues and thereby not only reduce the operating and maintenance costs but also recover capital costs [when recycled to industries]." Therefore, he says, "it has the potential to attract private sector investments in properly structure projects".</div><div style="text-align: justify"><br /></div><div style="text-align: justify">Rao says, "Waste-water recycling would be particularly attractive to address requirements of industrial use, if the demand is concentrated [eg SEZs]." That's one way to meet India's growing water needs.</div>
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<br><a href="http://economictimes.indiatimes.com/news/politics/nation/simple-cheap-solution-to-indias-grave-water-crisis-waste-water-recycling/articleshow/16507206.cms" class="re" target="_blank">The Economic Times, 23 September, 2012, http://economictimes.indiatimes.com/news/politics/nation/simple-cheap-solution-to-indias-grave-water-crisis-waste-water-recycling/articleshow/16507206.cms</a><div class="clear"></div>
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-The Economic Times
Where will India get its water from in the coming years? The water challenge is already grave and could get graver. By 2050, for instance, it is estimated that demand would go up to 1,180 million cubic metres,..." />
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<h1 class="cat-box-title">Simple & cheap solution to India's grave water crisis: Waste water recycling-Sanjay Vijayakumar</h1>
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<div style="text-align: justify">-The Economic Times</div><div style="text-align: justify"><br /></div><div style="text-align: justify">Where will India get its water from in the coming years? The water challenge is already grave and could get graver. By 2050, for instance, it is estimated that demand would go up to 1,180 million cubic metres, 1.65 times the current levels, a situation that would be made worse by fast dwindling fresh water resources.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">That's why desalination — removing salt from seawater to make fresh water — is increasingly catching the fancy of administrators. Two of India's most industrialised states, Tamil Nadu and Gujarat, are the keenest among the lot. A water-scarce Tamil Nadu, already running one desalination plant, is working to complete a second plant and planning for the third. Gujarat is also said to have desalination plans.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">"The industrial sector's preference toward desalination is expected to increase with the growing demand for processed water. Many of the coastal municipalities are also keenly looking to invest in desalination," says consultancy Frost & Sullivan's environment technologies expert Sasidhar Chidanamarri. India, along with the US and China, is seen contributing quite a bit to a global doubling of desalination capacity between 2010 and 2025, says Frost & Sullivan. Of course, the biggest contributor would be West Asia, which would by then account for half the world capacity.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">But the question that experts are increasingly asking, at a time when a draft water policy is being debated, is this: is desalination the best option?</div><div style="text-align: justify"><br /></div><div style="text-align: justify"><em>Treating Waste Water</em></div><div style="text-align: justify"><br /></div><div style="text-align: justify">Countries the world over, while being bullish about desalination, are equally bullish about other means, notably waste water recycling. Not India. Only about 31% of municipal wastewater can be recycled. That would be more than 75% in China. In a recent working paper titled "Water Supply in Chennai: Desalination and Missed Opportunities", researcher Sridhar Vedachalam of the New York State Water Resources Institute at Cornell University wrote that "desalination may provide a reliable supply of water to a city with chronic water shortage, but it is hardly the best option for more than one reason".</div><div style="text-align: justify"><br /></div><div style="text-align: justify">"Desalination, while being a source of fresh water, does nothing to address the challenge of managing those extra million litres of wastewater," says Vedachalam. "Recycled water, on the other hand, solves the twin problems in a single shot."</div><div style="text-align: justify"><br /></div><div style="text-align: justify">When Tamil Nadu launched its first desalination plant in 2010, at Minjur, 27 km from north of Chennai, the benefits seemed apparent. Tamil Nadu's water challenge is historically well chronicled. Now, it houses 6% of the country's population but only has 3% of its water resources. Also, Tamil Nadu gets an annual rainfall of 792 million metres versus the national average of 1,250 million metres. The per capita availability at 800 cubic metres in the state is just a third of the national average.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">"Why not go further and pick a more futuristic technology — one that addresses problems of water supply and wastewater management, is ecologically compatible — and lead the way for the rest of the country and even the world. Reuse can be implemented anywhere (not just in coastal areas) and, therefore, has a much bigger market allowing future improvements in technology and reduction in cost," says Vedachalam.</div><div style="text-align: justify"><br /></div><div style="text-align: justify"><em>Rs 25/litre Difference</em></div><div style="text-align: justify"><br /></div><div style="text-align: justify">For Sam Yamdagni, managing director of the Indian arm of the $3.8-billion US-based water technology company Xylem, there is no way waste water treatment can be missed. "Even when you are creating water through desalination, you have to look at creating waste water treatment because again you are going to generate waste."</div><div style="text-align: justify"><br /></div><div style="text-align: justify">But ecological compatibility isn't the only reason. There's a compelling cost reason favouring waste water treatment.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">R Raghuttama Rao, managing director of Icra Management Consulting Services, points out those cases. He says, "Desal is more expensive upwards of Rs 50 per kilo litre compared to Rs 25-35 per kilo litre for recycled sewage. Desal requires more power and is energy intensive."</div><div style="text-align: justify"><br /></div><div style="text-align: justify">Chidanamarri estimates the capex for desalination plants to be two-and-a-half times that of a conventional treatment technology. "Clearly, desalination is an expensive proposition. And the government is contemplating to offer tax incentives for industries which would help them in recovering the high costs." (He also points out, though, that improved technologies have over the years brought down the cost of water from desalination.)</div><div style="text-align: justify"><br /></div><div style="text-align: justify">Given this, Vedachalam had argued in his analysis, "Reliance on such expensive technology [desalination] does not augur well for a city [Chennai] that already does not collect revenues that match its expenses." A report in 2005 estimated that only a fifth of the water sold in Chennai was metered. The rest of the country may not be vastly different in this respect.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">Data supports this view. According to a presentation available on the Ministry of Urban Development Website, the average cost of wastewater treatment is Rs 4.5-6 a kilo litre, and this can be used for agriculture or gardening purposes. If treated for drinking use, the cost does jump to Rs 12 but this is still far less than what metros in India spend to bring potable water to its residents. Here are the numbers: from Rs 20 per kilo litre in Delhi to Rs 40-60 in Chennai.</div><div style="text-align: justify"><br /></div><div style="text-align: justify"><em>Perception Problems</em></div><div style="text-align: justify"><br /></div><div style="text-align: justify">The other significant side of the story is India's growing demand for water. Nowhere is this as evident as in the industrial sector, which now consumes about 50 billion cubic metres of water annually. That figure will jump to 120 billion cubic metres by 2025, says Frost's Chidanamarri.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">Given this, going in for waste water recycling aggressively should be a no-brainer. But that's not been the case. There's a reason why the actual scope for use of recycled water is far less. "From a mindset perspective, people are more ready to drink desalination water relative to treated waste-water," says Icra's Rao. </div><div style="text-align: justify"><br /></div><div style="text-align: justify">Rajiv Mittal, managing director of water treatment company VA Tech Wabag, agrees about the mindset issue. "In Singapore, the prime minister of Singapore campaigned for safety of recycled water for drinking and he was the first one to use this." Mittal says in Singapore they call it reusable water, not waste water.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">Icra's Rao says indirect potable use (where recycled treated sewage water is pumped into water bodies/river streams which is conventionally treated again) is becoming more popular. Singapore already does this. Bangalore was planning such a project but that has not happened so far, he says.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">But the low-hanging fruit in waste water isn't in challenging strong perceptions of the people but actually is in the industrial sector. Already, there are examples of treated sewage being used by industries in India. In Chennai alone, wastewater is supplied to companies such as Madras Refineries, Madras Fertilisers and GMR Vasavi Power for reclamation and reuse.</div><div style="text-align: justify"><br /></div><div style="text-align: justify"><em>Thirsty Industry</em></div><div style="text-align: justify"><br /></div><div style="text-align: justify">The industrial potential is already evident through desalination. VA Tech's Mittal knows that well. His company is the one building the second desalination plant in Chennai, some 45 km away at Nemelli. It is eyeing a big opportunity in the desalination space. Between 2005 and 2010, about 63% of the 5.3 lakh cubic metres per day of desalination capacity was accounted for by the industry. The municipal segment accounted for the rest.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">He reckons the way to go about it is this: waste water treatment for industrial use and desalination for domestic use. Europe does it well. It recycles about 60% of the domestic sewage generated and it is consumed for non-potable applications such as boiler feed water, cooling tower, landscaping, gardening and flushing.</div><div style="text-align: justify"><br /></div><div style="text-align: justify">Anand Chiplunkar, a director of urban development at the Asian Development Bank, says, "Wastewater treatment can generate revenues and thereby not only reduce the operating and maintenance costs but also recover capital costs [when recycled to industries]." Therefore, he says, "it has the potential to attract private sector investments in properly structure projects".</div><div style="text-align: justify"><br /></div><div style="text-align: justify">Rao says, "Waste-water recycling would be particularly attractive to address requirements of industrial use, if the demand is concentrated [eg SEZs]." That's one way to meet India's growing water needs.</div>
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<br><a href="http://economictimes.indiatimes.com/news/politics/nation/simple-cheap-solution-to-indias-grave-water-crisis-waste-water-recycling/articleshow/16507206.cms" class="re" target="_blank">The Economic Times, 23 September, 2012, http://economictimes.indiatimes.com/news/politics/nation/simple-cheap-solution-to-indias-grave-water-crisis-waste-water-recycling/articleshow/16507206.cms</a><div class="clear"></div>
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LATEST NEWS UPDATES | Simple & cheap solution to India's grave water crisis: Waste water recycling-Sanjay Vijayakumar
Simple & cheap solution to India's grave water crisis: Waste water recycling-Sanjay Vijayakumar
Published on Sep 24, 2012
Modified on Sep 24, 2012
-The Economic Times
Where will India get its water from in the coming years? The water challenge is already grave and could get graver. By 2050, for instance, it is estimated that demand would go up to 1,180 million cubic metres, 1.65 times the current levels, a situation that would be made worse by fast dwindling fresh water resources.
That's why desalination — removing salt from seawater to make fresh water — is increasingly catching the fancy of administrators. Two of India's most industrialised states, Tamil Nadu and Gujarat, are the keenest among the lot. A water-scarce Tamil Nadu, already running one desalination plant, is working to complete a second plant and planning for the third. Gujarat is also said to have desalination plans.
"The industrial sector's preference toward desalination is expected to increase with the growing demand for processed water. Many of the coastal municipalities are also keenly looking to invest in desalination," says consultancy Frost & Sullivan's environment technologies expert Sasidhar Chidanamarri. India, along with the US and China, is seen contributing quite a bit to a global doubling of desalination capacity between 2010 and 2025, says Frost & Sullivan. Of course, the biggest contributor would be West Asia, which would by then account for half the world capacity.
But the question that experts are increasingly asking, at a time when a draft water policy is being debated, is this: is desalination the best option?
Treating Waste Water
Countries the world over, while being bullish about desalination, are equally bullish about other means, notably waste water recycling. Not India. Only about 31% of municipal wastewater can be recycled. That would be more than 75% in China. In a recent working paper titled "Water Supply in Chennai: Desalination and Missed Opportunities", researcher Sridhar Vedachalam of the New York State Water Resources Institute at Cornell University wrote that "desalination may provide a reliable supply of water to a city with chronic water shortage, but it is hardly the best option for more than one reason".
"Desalination, while being a source of fresh water, does nothing to address the challenge of managing those extra million litres of wastewater," says Vedachalam. "Recycled water, on the other hand, solves the twin problems in a single shot."
When Tamil Nadu launched its first desalination plant in 2010, at Minjur, 27 km from north of Chennai, the benefits seemed apparent. Tamil Nadu's water challenge is historically well chronicled. Now, it houses 6% of the country's population but only has 3% of its water resources. Also, Tamil Nadu gets an annual rainfall of 792 million metres versus the national average of 1,250 million metres. The per capita availability at 800 cubic metres in the state is just a third of the national average.
"Why not go further and pick a more futuristic technology — one that addresses problems of water supply and wastewater management, is ecologically compatible — and lead the way for the rest of the country and even the world. Reuse can be implemented anywhere (not just in coastal areas) and, therefore, has a much bigger market allowing future improvements in technology and reduction in cost," says Vedachalam.
Rs 25/litre Difference
For Sam Yamdagni, managing director of the Indian arm of the $3.8-billion US-based water technology company Xylem, there is no way waste water treatment can be missed. "Even when you are creating water through desalination, you have to look at creating waste water treatment because again you are going to generate waste."
But ecological compatibility isn't the only reason. There's a compelling cost reason favouring waste water treatment.
R Raghuttama Rao, managing director of Icra Management Consulting Services, points out those cases. He says, "Desal is more expensive upwards of Rs 50 per kilo litre compared to Rs 25-35 per kilo litre for recycled sewage. Desal requires more power and is energy intensive."
Chidanamarri estimates the capex for desalination plants to be two-and-a-half times that of a conventional treatment technology. "Clearly, desalination is an expensive proposition. And the government is contemplating to offer tax incentives for industries which would help them in recovering the high costs." (He also points out, though, that improved technologies have over the years brought down the cost of water from desalination.)
Given this, Vedachalam had argued in his analysis, "Reliance on such expensive technology [desalination] does not augur well for a city [Chennai] that already does not collect revenues that match its expenses." A report in 2005 estimated that only a fifth of the water sold in Chennai was metered. The rest of the country may not be vastly different in this respect.
Data supports this view. According to a presentation available on the Ministry of Urban Development Website, the average cost of wastewater treatment is Rs 4.5-6 a kilo litre, and this can be used for agriculture or gardening purposes. If treated for drinking use, the cost does jump to Rs 12 but this is still far less than what metros in India spend to bring potable water to its residents. Here are the numbers: from Rs 20 per kilo litre in Delhi to Rs 40-60 in Chennai.
Perception Problems
The other significant side of the story is India's growing demand for water. Nowhere is this as evident as in the industrial sector, which now consumes about 50 billion cubic metres of water annually. That figure will jump to 120 billion cubic metres by 2025, says Frost's Chidanamarri.
Given this, going in for waste water recycling aggressively should be a no-brainer. But that's not been the case. There's a reason why the actual scope for use of recycled water is far less. "From a mindset perspective, people are more ready to drink desalination water relative to treated waste-water," says Icra's Rao.
Rajiv Mittal, managing director of water treatment company VA Tech Wabag, agrees about the mindset issue. "In Singapore, the prime minister of Singapore campaigned for safety of recycled water for drinking and he was the first one to use this." Mittal says in Singapore they call it reusable water, not waste water.
Icra's Rao says indirect potable use (where recycled treated sewage water is pumped into water bodies/river streams which is conventionally treated again) is becoming more popular. Singapore already does this. Bangalore was planning such a project but that has not happened so far, he says.
But the low-hanging fruit in waste water isn't in challenging strong perceptions of the people but actually is in the industrial sector. Already, there are examples of treated sewage being used by industries in India. In Chennai alone, wastewater is supplied to companies such as Madras Refineries, Madras Fertilisers and GMR Vasavi Power for reclamation and reuse.
Thirsty Industry
The industrial potential is already evident through desalination. VA Tech's Mittal knows that well. His company is the one building the second desalination plant in Chennai, some 45 km away at Nemelli. It is eyeing a big opportunity in the desalination space. Between 2005 and 2010, about 63% of the 5.3 lakh cubic metres per day of desalination capacity was accounted for by the industry. The municipal segment accounted for the rest.
He reckons the way to go about it is this: waste water treatment for industrial use and desalination for domestic use. Europe does it well. It recycles about 60% of the domestic sewage generated and it is consumed for non-potable applications such as boiler feed water, cooling tower, landscaping, gardening and flushing.
Anand Chiplunkar, a director of urban development at the Asian Development Bank, says, "Wastewater treatment can generate revenues and thereby not only reduce the operating and maintenance costs but also recover capital costs [when recycled to industries]." Therefore, he says, "it has the potential to attract private sector investments in properly structure projects".
Rao says, "Waste-water recycling would be particularly attractive to address requirements of industrial use, if the demand is concentrated [eg SEZs]." That's one way to meet India's growing water needs.
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