sewage

Two years ago, I visited the Central Park South apartment complex in Old Mahabalipuram Road (OMR) to observe and write about its in-house Sewage Treatment Plant (STP). While large apartment complexes are required to have the facility to treat their sewage, many in Chennai lack one. Unlike other buildings in OMR, Central Park South had little choice, as the Chennai Metropolitan Water Supply and Sewerage Board (CMWSSB) has yet to provide essential services like drinking water and underground drainage. I revisited the apartment this month, eager to see how the sewage treatment system had evolved. While it has had a…

An independent project monitoring wastewater in 46 locations in Bengaluru has interesting data that could potentially work as a city-wide early warning system for COVID-19 outbreaks. The platform called Precision Health has been actively collecting and analysing wastewater samples from Bengaluru since April 2021 to detect and monitor the presence of SARS-CoV-2.  The data from Precision Health mirrors the peak of the second wave in May, and the recent uptick in cases, in terms of the percentage of samples that were positive for SARS-CoV-2. The current findings from wastewater testing show that at the ward level, around half the wards…

In Bengaluru, apartments have to set up their own Sewage Treatment Plants (STPs) to manage the sewage they generate. But the design and operations of most apartment STPs are flawed. Often, residents suffer due to the poor quality of treated water which they have to reuse; and excess sludge from the STP is dumped elsewhere, endangering public health. We, at Brigade Altamont apartment in K Narayanapura, recently fine-tuned our STP system so as to make it fully legally-compliant, and with little investment. K Narayanapura has no underground sewer network, and our apartment is located near a rajakaluve that traverses Arkavathy…

Traditionally, Bengaluru’s lakes stay dry for a couple of months, and fill up during the monsoons. This made it easier for potters, brick makers and farmers to collect silt from lakes. But due to climate change, rapid urbanisation and unplanned development, more lakes have been drying up for longer periods of time. An article by Times of India states that “According to BBMP, about 50% of the lakes have water less than half of their holding capacity. Some of them have gone dry and in others, the water level is fast depleting”. Sowl Kere, Kannamangala lake, Arakere, Sarakki, and Yelahanka…

High Court pulls up Palike for not filling potholes While hearing the Public Interest Litigation filed by four Koramangala residents including Vijayan Menon in 2015, the division bench of Chief Justice Dinesh Maheshwari and Justice S.G. Pandit issued oral directions to the Palike to complete filling 1600 potholes by the next day (September 20). The deadline was then extended to September 24 to ensure that there were no potholes on the roads, but the Palike found it difficult to accomplish the task, especially as the white-topping work was in progress. The HC appointed a commission consisting of  Dinesh Agrawal, Head of…

The fully functional water treatment system. Pic: Akshatha M Arjun Ravi Kumar, a builder, once visited T-Zed, an apartment-cum-villa community that treats and reuses all its waste water. There he met Srinivasan Sekar, who as part of the Management Committee there, worked on the water system design. He recalls, "Sekhar offered me a glass of tap water saying that it is generated from sewage, initially I was a bit reluctant to drink it but when I did, (I realised) it was as good as any bottled water. " Arjun lives in an apartment that his firm built - Surbacon Maple,…

Nearly every citizen of Bangalore has heard of the current state of two of Bangalore’s biggest lakes - the Varthur and Bellandur lakes. The main reasons for the pollution of these lakes are the untreated sewage and industrial effluents that are constantly flowing into the lake.  Map source: All you need to know about Bellandur lake and its problems. Though we all know that these lakes are in bad shape, many of us may not be aware of the extent of  pollution. Check these shocking pictures. VARTHUR LAKE   The froth that we usually see at the top surface of…

At a public awareness programme organized by the BWSSB in November 2016, an irate apartment RWA Member asked the BWSSB official present, "What is the point in setting up an STP when we're already connected to the sewerage network? Treated sewage is going to mix with our neighbouring locality's raw sewage in your drains which you will treat in a large STP. What is the point of all of this?” Over the years, Bengaluru city has not only grown horizontally—to areas outside the sewerage network—but also vertically: previously sewered areas are seeing a manifold jump in sewage generated per acre…

What should Bengaluru - institutions and its citizens - do in the immediate run and the long run, considering the Cauvery dispute and the limits to water scenario? Just remember that only a third among us, or maybe half, are in the Cauvery basin, the rest are not part of the Water Tribunal process. This city has been built on a ridge and in the basin of two rivers, though many of us may not even be able to name the rivers into which Bengaluru empties its sewage. Consider this – we are pumping 1400 million litres of water per…

On the evening on May 12th, raw sewage gushed in from the eastern inlet for nearly 3 hours into Kaikondrahalli lake. With help from BBMP labourers provided by BBMP lakes Engineer Shilpa, and with many of the lake visitors and volunteers staying back at night to oversee the work, we could partially block the inlet. The blocking at the inlet was reinforced in the morning, but sewage continues to trickle in. With a JCB borrowed from Bren Construction, we tried to block the main source of the sewage inflow, but had to re-open it soon as the land owner and…