The project is prepared for Phase I and Phase II of the Vrishabhavathi valley.
In what could be termed a water recycle project for the City, the Bangalore Water Supply and Sewerage Board (BWSSB) has prepared a detailed project report (DPR) on Phase I and Phase II of the Vrishabhavathi valley recycle and reuse project.
In its move towards exploring alternative sources of water for the ever-expanding Bangalore, the BWSSB is now banking on utilising treated water. It has created a separate section, “new water new initiative” for the purpose.
The DPR has suggested a 140-million litre per day (mld) capacity waste water treatment plant (WWTP) at Doddabele in Kengeri where the treated water will be pumped to the Tavarekere pumping station.
Only 50 per cent
Only 50 per cent of this treated water will be let into the Arkvathi river course to be mixed with river water and reach the Thippagondanahalli reservoir. The remaining 50 per cent (70 mld of treated water) will be supplied to Peenya Industrial Area.
The treated water will enter the Thippagondanahalli reservoir through Arkavathi river course and the objective is to recharge the depleted aquifer en route. The reservoir has lost the ability to hold water as water is extracted through various borewells in the surrounding area.
The board will ensure water is retained in the reservoir for the whole year in an effort to recharge water table. The DPR also proposes a 145-mld capacity advanced treatment system at the TG Halli to supply water to the City in future.
Technical component
The phase I of the projectcomprises the technical component which mainly focuses on finding the alternative source, identifying the area, preparing the DPR and creating awareness about treated water.
The Phase II of the project pertains to implementation under which tenders will be called to execute the work.
Collaboration
The project will be taken up in collaboration with Singapore Public Utilities Board (PUB), which has revolutionised the concept of recycled water through its NEWater project.
The Public Utilities Board, Temasek Foundation and CH2M HILL are the project consultants which have prepared reports after studying the ground realities. The BWSSB is looking at various funding options and is said to be preferring Design-Build-Finance-Operate-Transfer model.