Sewage Treatment Plants (STP) | Centre for Science and Environment

Sewage Treatment Plants (STP)


Kumbh: time to come clean

Maha Kumbh in Allahabad has perhaps no parallel in terms of the sheer size of the congregation. In less than two months over 100 million people are expected to come to this city, which sees the confluence of two rivers of India—the Ganga and the Yamuna. People come to worship on the banks of the Ganga. Even as they celebrate the river it seems they don’t see the river, but only the ritual.

The STP Guide by Karnataka State Pollution Control Board

Karnataka State Pollution Control Board has come with Sewage Treatment Guidebook in the interest of general public. This guidebook takes the reader through the various units, operations and processes in a typical Extended Aeration Biological Treatment Plant.
Download the book

How to Clean the Yamuna

While the Delhi government has been debating on what needs to be done to clean the river, the pollution levels have only worsened.

In its book Sewage Canal: How to Clean the Yamuna, published in 2007, the Centre for Science and Environment reported that the Delhi stretch of the river is not only dead but had an overload of coliform contamination. Two years later, the pollution data shows no respite to the river.

The 22-km stretch of the Yamuna, which is barely 2 per cent of the length of the river basin, continues to contribute over 80 per cent of the pollution load in the entire stretch of the river. There is also no water in the river for virtually nine months. Delhi, impounds water at the barrage constructed at Wazirabad where the river enters Delhi. What flows in the river subsequently is only sewage and waste from Delhi’s 22 drains. In other words, the river ceases to exist at Wazirabad. 

This also means that there is just no water available to dilute the waste. The issue of a basic minimum flow in the river has been discussed time and again, but with water becoming more and more scare and contested, Delhi’s upstream neighbours are reluctant to release water. Delhi itself is water greedy and sucks up each  drop that is released as its share. The river is then reduced to a drain for the filth and waste of the city’s inhabitants.

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Front Page Teaser: 

While the Delhi government has been debating on what needs to be done to clean the river, the pollution levels have only worsened. 
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