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Sunday, September 23, 2012

India’s coming grave water crisis has a simple, cheap India's water crisis' cheap solution: Waste water recycling solution: wastewater recycling


India’s coming grave water crisis has a simple, cheap India's water crisis' cheap solution: Waste water recycling solution: wastewater recycling. But for private capital to get into this, public policy must challenge perception biases against recycled water.
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.

Source :E.T

Monday, September 17, 2012


                                                               GO GREEN
Its high time, and we have to wake up and start going GREEN.The level of chlorofluorocarbons, the level of carbon dioxide, the pollution everywhere leading to contamination of each and every thing in our life.
The temparature is rising at an alarming level due to green house gases, leading to warming up of whole earth.
The glaciers are melting leading to the rise of sea levels, submerging Islands and creating unusual environment for the marine life.
The toxin levels of all the contaminants are increasing day by day.
Result of all these is untimely rains, spreading of diseases, cancers, decreased levels of oxygen, depletion of ground water, Ultimately the bad LIVING CONDITIONS and Difficulty for SURVIVAL in the near future.
                                                lets Go Green
So lets go green, let us utilise our electricity wisely and let us put off the fans,lights and AC's when they are not required.In large scale government has to think of developing technologies which substitute the current energy.It must concentrate on technologies which can efficiently make use of RENEWABLE sources of Energy.Let us utilise wind energy, solar energy,lightning,tidal energy, and strict Regulatory norms should not only be formulated but also IMPLEMENTED STRICTLY.
                                                 It is also each Individuals responsibility to think of all the problems and try to plant trees and keep ur surroundings clean and Minimise the pollution as far as posssible.
                                      GO GREEN

Sunday, September 16, 2012

Marketing Strategy-Aircel Unlimited 3G

Aircel unlimited is little deceiving or in marketing Jargon we say it Persuading the customer.Watever it may be, the offer is attractive to the customers where they think that it is 3G unlimited.But actually it is a limited 3G and Unlimited 2G.
For example we take RC 197, it is 1GB 3G data and Unlimited 2G.
However, the offer is luring to the customer and most of them do not know wat actually it is.But the good thing is atleast it is giving 1GB of 3G data for just 197 which is 'value for money' and unlimited 2G is also another benefit but we have to compromise on the speed.
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