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Treating Wastewater – STP

Sewage_Treatment_Plant

Treating Wastewater – STP

Water is one of the most essential necessities of life. As we all are aware, one of the most significant issues faced by the society now is the shortage of fresh water, thus, increasing the price of water, and limiting the usage of water to bare minimum and basic needs. With the rapid speed of urbanization in the country, the need for water also increased rapidly, but without the resources to meet the need. As of now, around 80 percent of the water used for domestic purposes, comes out as wastewater. But sadly, most of the wastewater is left untreated which results in pollution. This, if treated, could be used for flushing toilets and watering plants and several other uses. With today’s ever-evolving technology there are some of the ways water could be treated, helping us regain as much as reusable water as possible. One such process for treating water is STP- Sewage treatment plant.

Sewage treatment is the process of removing contaminants from wastewater and household sewage water. The sewage treatment plant, in short STP, processes are of two types – Anaerobic sewage treatment and Aerobic sewage treatment. But the most convenient process for small-scale treatment is the Aerobic sewage treatment. In this treatment process, aerobic bacteria are important, as they digest the pollutants. There must be a constant supply of air for the bacteria to colonize which could be achieved by surface or diffused aeration. The most modern aerobic sewage system uses natural air currents that do not need electricity or petrol or diesel to run motors for aeration.

Sewage treatment plant involves four stages – the preliminary treatment, the primary treatment, the secondary treatment, and the tertiary treatment. The conventional diagram of STP includes screening and grit removal from the wastewater in the preliminary stage. Sedimentation in the primary treatment follows the previous stage. In the secondary stage, activation of sludge or the trickling filter takes place. And in the last stage, the disinfection, nutrient removal, and solids removal occur. The whole process at the end results in treated water which is reusable.

Wastewater treatment should be highly emphasized not only in apartments but also hospitals, malls, restaurants, etc as it not only saves water by making water eligible to reuse but also stops the damage caused when wastewater is directly released into the environment. It is affordable and simple. It also increases the standard of living of the society. Sewage treatment is a one-time investment. It may cost around maybe fourteen lakh rupees for a 100 apartment community but it just takes 25 rupees per family per month to keep it running. The efforts, as well as the money, are all worth it, in the end.

At the moment it is necessary for all communities to think seriously and act on wastewater as the crises of water shortage is not going away anytime soon. Before we know it, India may become the next Flint (USA) or Cape Town. It is absolutely important to keep the future generations in mind while we progress.

Reference- http://www.crystaltanks.com/sewage_treatment_explained.html
https://economictimes.indiatimes.com/treating-wastewater-with-the-help-of-modern-technology/toshibashow_dp/55050324.cms

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Housing societies take it upon themselves to recycle

Recycling_of_Waste

Housing societies take it upon themselves to recycle

JK Rowling once said, “We are only as strong as we are united, as weak as we are divided.” The famous quote, along with other such phrases and idioms on unity, stand true in the world we live in. When people come together for or against a cause, the results are otherworldly. An excellent example of the effect is Matoshree Pearl Housing Society.

The 22-storied apartment complex in Mumbai houses 65 flats that come together to recycle and reuse the wastes from each home. Wherein the wet wastes, then, is used as manure for the 4,000 square feet terrace vegetable and ornamental garden.

The housing society’s green movement started three years ago when a collective decision was made by the management committee of Matoshree Pearl to use LED lighting instead of tube lights and CFL bulbs. A member of the group, Satish Kini shared, in an interview with The Better India, how he did not wish to stop there. Instead, he went on to find a solution for the friction between the society’s housekeeping staffs and local corporation workers by finding out the root cause—waste management. In a quest to find a way to be less dependent on the BMC (Brihanmumbai Municipal Corporation) for the disposal of garbage, Kini approached RUR Green Life—a social environment enterprise.

With RUR’s help along with support from the management committee, Kini launched a Go Green Campaign in October 2017, the aim of which was to educate the residents about segregating their kitchen wet wastes and turning them into compost. Despite the difficulties the society had to face in terms of infrastructure and implementing their Green plans, the inhabitants came together to fund the terrace garden. Utilizing RUR’s proprietary Bio-Composters and multi-level segregation of dry, recyclable, and non-recyclable wastes from each house, they have created a system that runs like a well-oiled machine.

Everyone in society has his or her part to play in the maintenance of the terrace garden. Children have the responsibility of individual patches distributed among them, and homemakers and the elderly help them with their task. To irrigate the plants effectively, the housing society utilized drip irrigation. The first phase of the terrace garden, however, was creating the manure out of the composters. Approximately, 60-70 kg of manure was produced in a month from 700-800 kg of kitchen waste. Once the compost was ready, the society started planting saplings of decorative plants. It was only later that Matoshree planted vegetables like tomatoes, cucumbers, etc.

All the hard work of the residents and housekeeping staffs, who were in charge of segregating the wastes, paid off when the society started harvesting a variety of vegetables. These veggies are, today, used by the inhabitants; saving money on groceries. However, their hard work benefits the BMC more, for they observed a reduction of 1000-1200 kg of wastes sent to the landfills around Mumbai. With other eco-friendly projects like solar energy production and sewage water treatment in the pipeline, Matoshree Pearl Housing society shows that unity can overcome any number of hurdles and achieve a greater effect.

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Pimpri-Chinchwad uses Rainwater Harvesting to Battle Water Woes

Rain_Water_Harvesting_02

Pimpri-Chinchwad uses Rainwater Harvesting to Battle Water Woes

Summer has brought water woes to a lot of housing societies in Pimpri Chinchwad, which makes citizens spend lakhs of rupees on tankers. One culture in Pimple Saudagar has revealed such wasteful expenditure could be curbed. Roseland Residency executed a rainwater harvesting job on its assumptions and is now reaping the harvest of its foresight. The society is spread across 12 acres.

Chairman Santosh Maskar stated the overall daily need of water presently is 10 to 12 lakh litres, but they get just 70,000 to 80,000 litres every day from PCMC.

“In 2009, we began implementing rainwater harvesting to recharge groundwater so we could draw from the borewells and decrease our reliance on tankers. The pilot project was used in six buildings for Rs 2.5 to Rs 3 lakh. On executing the project, the cost is to Rs 40,000 each construction. We do not require any water tankers in the summertime,” said the chairman.

Rainwater harvesting is a way of collection and storage of rainwater in organic reservoirs or tanks, or the infiltration of surface water to subsurface aquifers (until it’s lost as surface runoff). One way of rainwater harvesting is rooftop harvesting. Together with rooftop harvesting, any surface — plastics, tiles, metal sheets, but not palm or grass foliage — may be used to intercept the flow of rainwater and supply a family with storage and drinking water. Other applications include water for livestock, gardens, and irrigation, etc..

Rainwater harvesting supplies a different water source. In places where water is difficult or expensive to find, rainwater harvesting is a supply of water that is fresh. In developed nations, rainwater is harvested to be utilized as a supply of water as opposed to supply, but the harvesting of rainwater may reduce utilization amounts or a family’s water expenses. Rainwater is safe to consume. Rainwater can also be independent of salinity or pollutants within soil water, raising the value of mobile drinking water accessible when rainwater harvesting is utilized. It may be used for cleaning, washing clothes etc.

The achievement of Roseland Residency could be reproduced by all housing societies. Ashok Shinde, chairman of Kunal Icon housing society, stated, “Our society has 450 apartments and 40-row homes. Each of the four borewells from the society dries up in February, and now we must rely on water tankers to our everyday needs from February to May.”

Anil Deore, secretary of Rosewood Apartment and Condominium co-operative society, stated, “Our society is just three years old. It’s 350 apartments, and we get just 35,000 litres of water every day from PCMC rather than the 1.25 lakh we need. In 2016, we needed to get tankers. We invest Rs 2 lakh a month .”

Both housing societies employed rainwater harvesting facilities in the assumption that water can be yielded by their borewells to recharge groundwater levels, but didn’t gain from it.

Maskar stated they’d assist home societies in Pimple Saudagar to implement rainwater harvesting and prevent the squander of lakhs of rupees on water tankers.

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