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Public Health / Sanitation

Nano filter can clean Cooum

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Deccan Chronicle 30.07.2009

Nano filter can clean Cooum

July 30th, 2009
By Our Correspondent

Chennai, July 29: The Cooum river, a blot on the face of Chennai, could be cleaned and made beautiful, claims a Chennai scientist. Prof Sundara Ramaprabhu of IIT-Madras has developed a low cost nano material that can be installed in the sewage outlets discharging the city’s effluents into the river.

The nano material will filter the effluent and ensure that the sewage let into the river is clean.

Prof Ramaprabhu has already tested his nano filter and hopes to get the nod from the state government to mass-produce and use it in a big way to clean up the three waterways that pass through Chennai and pollute the city by taking in the filthy sewage of the seven million residents.

The professor has applied for patent for his filter which will revolutionise urban sewer treatment and ensure cleaner environment.

“We can remove all toxic and non-toxic materials from the Cooum or any other water source by this nano filter,” Prof Ramaprabhu, head, Alternative Energy and Nanotechnology Laboratory, told Deccan Chronicle.

He said the filter material was fully indigenous.

What is unique about Prof Ramaprabhu’s technology is its simplicity. “The nano material will adsorb all toxic and harmful elements from the effluent waters. It could be purified by simple fluid wash and reused several times,” he said. He added that the technology does not require costly plants or equipment.

The exit points of all inlets that bring effluent water will be covered with the nano filter.

“This will ensure the purification of the contaminated water. The same water could be used for industrial purposes,” said Prof Ramaprabhu.

He said senior Tamil Nadu government officials who were shown the laboratory-scale demonstration had expressed satisfaction over the new technology.

 

Bids soon for Chennai storm water drains

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The Business Line 29.07.2009

Bids soon for Chennai storm water drains

M Ramesh

Chennai, July 28 The Corporation of Chennai expects to float tenders for the Rs 830-crore project for the construction of storm water drains for 12 watershed areas in Chennai.

Tenders are out for consultancy (‘third-party quality assurance and quality control services’) for the project, which is to receive funding under the Jawaharlal Nehru National Urban Renewal Mission (JNNURM).

This, of course, is for the Corporation’s part of the project. The other part will be taken up by the Public Works Department.

The total outlay for the project is about Rs 1,400 crore.

Water logging

The Corporation Commissioner, Mr Rajesh Lakhoni, told Business Line on Tuesday that upon completion of the project, Chennai city would be rid of water logging during the rains.

Further, the flows through the major drains will also improve. He said the project would be completed in about two-and-a-half years from now.

The project includes purging of silt and construction of RCC side walls for the 16 main arterial drains flowing within limits of the Corporation.

Quality assurance

“In order to ensure good quality of construction and improving efficiency, it is proposed to provide third-party quality assurance through an independent agency, thereby, assisting the Corporation of Chennai in ensuring good quality of construction for the works being taken up by Corporation of Chennai,” says the tender document.

Last Updated on Wednesday, 29 July 2009 12:35
 

Roadside eateries pose health hazards

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The Hindu 29.07.2009

Roadside eateries pose health hazards

K.V. Prasad

Majority of the eateries use oil of poor quality and artificial colouring agents

— Photo: M. Periasamy.

Unsafe: Doctors and health officials point out that the food items served at roadside eateries cause health problems.

COIMBATORE: Poor quality of stored water, the use of non-permitted colouring agents and the overall lack of hygiene are some of the potential health hazards that roadside eateries pose to the people, according to doctors.

“I am getting a large number of patients complaining of food poisoning. This is seen especially in those who are frequenting the roadside eateries,” says Senior Consultant Paediatrician V. Radhakrishnan. He attributes this to poor hygiene at the eateries.

Food contamination may lead to dysentery, cholera and jaundice. A majority of the eateries use oil of poor quality and artificial colouring agents, the paediatrician says.

“Children have lesser resistance compared to adults. That is why they run into complications quickly after consuming some items at these eateries,” he says, indicating at the risk of children flocking to such eateries near parks that are the only entertainment centres in the city.

The doctor recalls the case of a boy brought to him with a complaint of urine discolouration. “His urine was red. I had not seen such a case in my 30 years’ experience. After enquiring about the food taken over the last few days, the doctor found that a candy sold on the roadside was the culprit. “It must have had a non-permitted colouring agent. That is why this particular problem was caused in the child.”

Director of Sri Ramakrishna Institute of Oncology and Research P. Guhan says both adults and children must keep off highly coloured food, whether in roadside eateries or big hotels.

Mostly, the chilli cauliflower and chilli mushroom items have very high content of artificial colouring agents. The salt content is also high as it is used as a preservative. Therefore, repeated consumption can cause cancer in the stomach and aesophagus in people who may be vulnerable to the disease.

“We cannot say that everyone will get cancer if they eat these items. But, it is also unwise for people to assume that they will not be affected. They must note that there is no test to find out who is vulnerable and who is not,” Dr. Guhan explains.

Dr. Radhakrishnan calls for concerted efforts to eliminate the health hazards posed by the stalls and quotes some officials as saying that sufficient food or health inspectors are not available to check the menace.

Assistant City Health Officer of the Coimbatore Corporation R. Sumathi says she and her team of food inspectors have raided the roadside stalls, especially at Tatabad and on Thadagam Road, many times and imposed fines on them.

Even as the Corporation is trying to regulate these stalls and ensure that food sold in any eatery of any type is hygienic, the health official advises people to stay away from unhygienic eateries.

Dr. Sumathi agrees that artificial colouring is bad, even if permitted colours are used. “Even permitted colours are made out of petroleum products. Therefore, these can cause cancer,” she warns. Another problem is that the roadside eateries, especially the ones on pushcarts, re-heat oil. This can increase cholesterol to dangerous levels. Another danger is from mixing of oils. These stalls mix rice bran oil with coconut oil to increase taste and minimise expense, she said.

Last Updated on Wednesday, 29 July 2009 11:08
 


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