Process

Sr. No.	HEADING	14 MLD OLD PROJECT (Rs. in Lakhs)	2 MLD EXPANSION PROJECT (Rs. in Lakhs)
1	Project Cost	667.00	606.00
2	Industry Contribution	333.50	386.89
3	Subsidy -
	MPCB	33.35	17.19
	MIDC	133.40	116.00
	MoEF	166.75	85.92
	TOTAL	333.50	219.11

Water Connection	Polluting
Size	Amount
Size up to 25 mm	3,90,000 /-
40 mm	9,00,000 /-
50 mm	16,50,000 /-
80 mm	27,00,000 /-
100 mm	42,00,000 /-

Notes: The above rates are based on water connection size. These rates are effective from 01.06.2010 For non polluting industries, the contribution is Rs. 10,000 /- The operation and maintenance cost of CETP is recovered from the member industries through Treatment Charges (TC). Category wise Effluent Treatment Charging Pattern

Sr. No.	Type of Industries	Rate in Rs. /M3 of Water consumption
1.	SSI / MSI Textile and Large Scale Chemical Industries	8.40
2.	SSI Chemical Industry having water consumption more than 260 M3 p.m.	25.20
3.	SSI Chemical Industry having water consumption less than 260 M3 p.m.	21.00

The effluent generated by the industries being collected in CETP by gravity lines from MIDC Phase 1 and MIDC Phase 2 effluent being pumped by MIDC from their collection sump and sent to our CETP Collection sump. The Equalization Tank is used to dampen the variations in the quality and flow rate. In order to keep the effluent suspended solids away from settling and to ensure proper mixing, 5 Nos of Floating mixers have been installed in collection Tank. The pH correction is carried out with lime if required. The effluent is pumped to flash mixer wherein PAC & poly electrolyte is dosed with rapid mixing and led to Clarifier to flocculate and settle suspended solids as well as remove certain portion of suspended organic matter. The Suspended Solids settle down in Primary Clarifier leaving the clear supernatant overflow from the weir top and it is the primary treated effluent, which goes to Aeration Tank for secondary biological treatment. The settled sludge is scrapped with scrapper mechanism and pumped to sludge sump which is further thickened in thickener and dewatered with Centrifuge Decanter. The centrate of the Centrifuge Decanter is taken to Equalization Tank for further treatment. In Aeration Tank, the Biomass has been developed which is the culture of aerobic microorganism. The oxygen required for microorganism is supplied by surface aerator and espirator. The bacteria consume the organic matters present in the effluent as the source of their food producing the new bacterial cells and Carbon Dioxide and water as by-products. The overflow of Aeration Tank goes to Secondary Clarifier where Biomass (MLSS) settles down leaving clear supernatant at the top which is treated water. The treated water is discharged in the Thakurli creek through Nalla provided by MIDC. The settled sludge is partially recycled back to Aeration Tank for maintaining the MLSS concentration in it and partially wasted in sludge sump and is dewatered and dried with sludge generated in primary treatment. The dried sludge is sent to Mumbai Waste Management Ltd., for further treatment & land filling as per the consent conditions.

Name	No. of Units	Design Load	Design Parameters
Equalization Tank	1	16000 m3/day max. Average 667 m3/hr.	HRT	5.3 hrs.
			Available Volume	3500 m3
Flash Mixer	1	16000 m3/day max. Average 667 m3/hr.	HRT	6.5 min
			Volume	72 m3
Primary Clarifier	1	Max: 16000 m3/day Average: 667 m3/hr.	Surface Load	22.64 m3 /m2/day
			HRT	3.14 hrs
			Volume	2100 m3
Biological Reactor	10	16000 m3/day	F/M ratio	0.2/day
			SO	640 mg/L
			S	30 mg/L
			MLVSS	3500 mg/L
			MCRT	33 days
			Px	1965 kg/day
			Oxygen	15120 kg/day
			Total Volume	14265 m3
1 st Stage Secondary Settling Tank	1	16000 m3/ day max. Average 667 m3/hr.	Surface Load	22.64 m3 /m2/day
			HRT	3.14 hrs.
			Volume	2100 m3
V-Notch Sump	1	16000 m3/ day	HRT	0.25 hrs.
			Volume	150 m3
Solid Bowl Centrifuge	2	15 m3/hr.	Primary Sludge	6400 kg/day
			Secondary Sludge	1965 kg/day
			Sludge Consistency	5%
			Slurry Volume	167 m3/ day
			Cross-Section	12.56 m2 each