SOBHA’s Sewage Treatment Plant:  Making a mark

March 26th, 2018

SOBHA is known for its quality of planning, design, execution, precision, on time delivery and customer satisfaction across the real estate sector. All our projects offer world-class amenities with an emphasis on sustainable living. While Sewage Treatment Plant (STP) is a neglected area, we believe that it is an integral aspect of a project.  The robust design, execution, ease of operation and maintenance of our STPs has won us appreciation of authorities and customers alike.

 Significance of STP

Water is an indispensable part of our lives. It is required for our everyday needs such as drinking, cooking, bathing, washing, flushing, cleaning and much more. With limited supply of fresh water, people are forced to buy the water tankers, spending huge amounts of money. However, this demand for fresh water can be addressed by reusing the treated water for flushing, cleaning, and watering the landscape, saving around 40% of the total water requirement. Most STPs fail to perform due to poor design, execution, selection of wrong technology, poor arrangements for continuous operation, lack of knowledge about safety requirements, untrained operators, poor maintenance of equipment and improper monitoring to name a few.

 How is SOBHA addressing the fresh water requirement?

Earlier, water requirement for domestic and flushing purposes were fulfilled by bore well / tanker water. Of this approximately, 35% of was used for flushing and the rest for domestic and drinking purposes. However, the STP treated water was only used for watering the landscape area. This prompted the Karnataka State Pollution Control Board (KSPCB) to issue a notice to reuse STP treated water for secondary purposes as well.

The prescribed norms are so stringent that the turbidity value is required to be maintained <2 Nephelometric Turbidity Unit (NTU), which can be achieved through membrane technology. At SOBHA, utmost care is being taken to not only follow the necessary guidelines but also the best of technology to power STPs. In line with this, we have started installing extended aeration models with Ultra Filtration (Membrane Technology) system. These models can be operated in Sequential Batch Reactor mode (SBR) during low flow rates from the start of warranty maintenance. Generally, the sewage flow equivalent to 40% of designed capacity is required to commission the STP and supply the treated water for secondary purposes. However, due to our flexibility in design and execution, the STP treated water is charged for flushing with flow rates as less as 25% of its designed capacity. At the same time, we ensure that the treated water quality complies with the norms prescribed by KSPCB. This has enabled SOBHA to restrict the fresh water demand in the range of 90 to 110 Litres per Capita per Day (LPCD).

Today, wastewater treatment plays a pivotal role in not only solving the water scarcity problems but also promoting a sustainable lifestyle. And, SOBHA is at the forefront of playing its part in the process.

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