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Water Treatment

Fluoride treatment plants in nine wards

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Deccan Herald             28.11.2013  

Fluoride treatment plants in nine wards

The Bruhat Bangalore Mahanagara Palike (BBMP) will instal 1,000-litre-capacity fluoride treatment plants in nine wards of Yelahanka and Mahadevapura divisions.

The Palike decision comes after it discovered high fluoride and nitrate contents and total dissolved solids (TDS) in the underground water in the nine wards – Chowdeshwari Ward, Attur, Jakkur, Thanisandra, Hoodi, Anjaneya Palya, Hagadur, Varthur and Bellandur – while sinking borewells recently.

Moreover, the High Court had directed the civic authorities to provide potable water to citizens and set up water-filter plants in areas where water contamination is very high. The Palike resorted to sinking borewells as the water table had drastically dipped in these areas.

Nitrate and fluoride are often described as silent killers and slow poison. While fluoride can cause arthritis, osteoporosis and other bone-related ailments, high nitrate content can lead to blue-baby syndrome causing heart-related problems among children.

Nitrate occurs in ground water due to sewage. Most of the water bodies in these areas are highly contaminated because untreated effluents are let directly into them by many apartment dwellers.

“Borewells in Attur are going too deep, almost 1,000 feet, where the chances of fluoride content in water is always very high. Tests have confirmed that fluoride, TDS and nitrate are high in Attur. So, the Palike has floated a tender to set up a water treatment plant in my ward,” said Attur Corporator K N Geetha Shashikumar.

She said the lakes in the newly added wards of the BBMP were highly contaminated due to lack of underground sewerage lines. She said her ward has Attur Lake, spread over 84 acres, but it has dried up despite heavy rains this year. “There was little water due to rains this year, but it has dried up again. The water table has depleted so badly that we have to sink a borewell near Attur Lake and the water again is contaminated,” said the corporator.

 

Ahmedabad Municipal Corporation to reuse sewage water

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The Times of India            27.11.2013

Ahmedabad Municipal Corporation to reuse sewage water

AHMEDABAD: In a bid to save fresh water, the Ahmedabad Municipal Corporation has decided to use treated water of the sewage treatment plant to water its garden.

The AMC to reuse the sewerage water has decided to have a recycling plant for treatment of sewerage water. The capacity of the plant will be about 10000 liters per day and the same will be set up in Navrang garden.

Officials said the plant, with the capacity of 10,000 litres, will be installed in a small area of 20sqm. According to them, the biological oxygen demand in the water will be less than 10 milligrams per litre.

Officials said that untreated water will be brought in the tank and will be treated in three different tanks. First, solid particles will be separated from the water and then the cleaning process will start.

The AMC, which is using bore water to water the gardens, will not only save on the water, but will also save 40 units of power daily which will help save Rs 73,000 annually per garden. If successful, the AMC will implement the same project in the other 200 AMC gardens of the city.

 

New sewage plant to start operation in December

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The Times of India      22.11.2013

New sewage plant to start operation in December

NOIDA: Following positive results during the trial run of the new sewage treatment plant (STP) in Sector 168, Noida Authority is set to commission its full-fledged operations in December. The 50MLD plant has been built for treating sewage generated from 91 sectors, several of which are along Noida-Greater Noida Expressway and yet to be fully developed.

Trial runs of the plant had been temporarily suspended for a month during the monsoon when outlets of the STP were clogged due to reverse flooding from the Yamuna waters. It took UP irrigation department a month to mitigate the after-effects of the floods.

Officials added that equipment at the STP have been found fully functional during tests. Parameters related to effluent quality, like levels of chemical oxygen demand and biological oxygen demand, have also been found to be within check. The plant has been built to treat sewage using the advanced SBR technology.

"The plant is largely a part of infrastructure works being built for newly-developed sectors. The capacity of the plant would be further enhanced as sectors start getting populated," said Samakant Srivastava, PE (Outer), Noida Authority.

The cumulative sewage treating capacity of Noida - with STPs in Sectors 50, 54, 91 and 123 - is 168MLD at present. The new plant will take total sewage treatment capacity of the city to 218MLD even as sewage generation remains slightly above the 150MLD mark.

 


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