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POWER FROM SEWERAGE SYSTEM,1 May 2007 Print E-mail

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New Delhi, 1 May 2007

POWER FROM SEWERAGE SYSTEM

NEW DELHI, May 2 (INFA): Rapid urbanisation is putting a severe strain on the basic resources of cities the world over. One of the main problems plaguing these metros is the absence of an effective waste disposal mechanism. Thankfully, a few cities are waking up to these problems and devising measures to tackle them.

Vietnam’s largest city, Ho Chi Minh City, plans to use a new technology to generate power from wastewater. According to the Japanese company, “Tsukishima Kikai”, which has developed the technology, organic waste from the sewage system would be used to generate power.

The system consists of an aeration panel and an innovative air diffuser with high oxygen transfer efficiency. The waste would be treated in an anaerobic container for 20-30 days, after which it would be turned into biogas.

The technology reduces pathogens and unpleasant odours, stabilizes waste quality and improves treatment performance. The biogas which is obtained as a by-product is used to generate electricity.

The city officials are confident that the technology would be beneficial for the city which every day dumps over one million cu.m of domestic wastewater, 400,000 cu.m of industrial wastewater, 4000-5000 tonnes of household garbage and seven tonnes of untreated non-hazardous garbage into its rivers and canals.

Meanwhile, Salt Lake City, the capital of Utah state in western US is exploring a pilot project to convert sewer waste into energy to run a heating and cooling system in a downtown 8000 square foot building.

According to the city officials who are partly funding the project, the heat will come partly from solid waste, and mostly from warm water that runs in sewage pipes after draining out of toilets, showers, and sinks.

The sewage temperature---between 550C and 600C – combined with a constant ground temperature of about 550C provides a viable ground source for a heat-pump system.

Through the pilot system is expensive and costs $20,000 more than traditional systems, it holds promise because of its environment-friendly nature. And the city officials believe that if it works well, it could eventually be used on a mass scale. ---INFA

BHEL’S PLAN FOR R&D

HYDERABAD, May 2 (INFA): The Hyderabad-based Bharat Heavy Electricals Ltd. (BHEL) has drawn up plans to spend Rs.1,000 crore by the year 2012 on research and development.

It may be added that its expenditure on R&D rose from Rs. 124 crore in 2004-05 to Rs.238 crore last year, recording a 91 per cent increase in the last two years.

The focus would be on the power sector keeping in view the increasing demands in the future.---INFA

 

 

 

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