Recycled water is proposed to be supplied to M/s Karnataka Power Corporation Limited and M/s Pulikeshi Power Corporation for their power generation plants to be located at Bidadi & Kumbalgod industrial areas repectively.

Part of the treated flow is the sewage drained through Vrishabhavathy Valley. The sewage from KM Halli is also lifted and conveyed to the plant for final disposal.

Conventional Bio-filter process has been adopted for secondary treatment. Mechanical screens (coarse and fine), Detritor, Primary clarifiers, Bio-filters, Secondary clarifiers, Primary and Secondary sludge, Re-circulation pump house, Digestors and Drying beds are provided.

The plant is designed to produce an effluent having BOD of not more than 20 mg per litre and suspended solids not exceeding 30 mg per litre. The effluent is discharged into the V-Valley at RL794.00 and is in accordance with IS4764-1973 standards.

Of the two tertiary treatment plants(TTPs) in Bangalore one at Yelahanka and another at v.valley have been planned and executed by BWSSB, the 60 million litre per day (MLD) capacity plant at v.valley is 2nd in the row and biggiest in the country both in size and technology.

The secondary treated sewage is fed into an aerobic attached growth trickling filter, which is the first stage of tertiary treatment. The wastewater flows through a plastic cross flow type media , where attached active biomass feed on organic pollutants. The downward flowing wastewater carries with it excess biomass, which develop as a result of bacterial activity. The output from the trickling filter is fed into the high rate clarifier DENSADEG unit and passes through a flash mixer before entering the clarification unit. The DENSADEG unit combines two facilities in a single tank-separation of floc from water using lamellar separators and counter current flow to separate water from sludge and thickening of sludge that settles at the bottom through a picket fence equipped scrapper . Clarified water from DENSADEG flows into biological filtration unit FLOPAC. Settled sludge is continuously recycled back to flocculation reactor and excess sludge is sent to dewatering.

The oxygen saturated water from the pre-aeration tank flows trough a channel to biological filter and is fed from the top . as the water flow through the media fine, suspended solids are filtered out and active biomass in the presence of dissolved oxygen in water degrades the organic pollutant. Filtered water from the filter is collected in a common treated water channel, which leads into filter water collection tank. The overflow from filtered wash water collection tank flows into dis-infection chamber.The treated water from FLOPAC is finally treated with chlorine solution in the dis infection chamber . The chamber is provided with baffling , to increase the length of travel of water before it reaches water collection tank, and also
to have effective dis-infection action of chlorine.