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Taloja CETP Co-operative Society Ltd. has
cluster of 950 Member Industries. These units are mainly
involved in manufacturing of viz. chemicals, Bulk drugs,
drug Intermediates, Fertilizers, Glass, Petrochemicals,
Pigments, Dyes and Intermediates, Specialty chemicals,
Engineering and Textile, Food and Fish processing. The
product range results in a set of individual effluents,
which have to be provided for a combined treatment. Under
the guidelines from Ministry of Environment & Forests, New
Delhi, the Common Effluent Treatment Plant facility for
industries in Taloja MIDC area was proposed in 1994. The
CETP initially was conceptualized for Small Scale Industries
considering their space, financial and technical constraints
of effluent treatment. Later on the large and medium scale
industries were made the part of CETP due to common effluent
collection and disposal line and considering their treated
effluent as a dilutant of effluent to make the treatment
scheme feasible.
The CETP of 10 MLD capacity was constructed
and brought into operation in December 1999.
In the course of time CETP modifications were
carried out. The equalization volume was increased by
converting disposal sump into equalization tank and the
inefficient surface aerators in aeration tank were replaced
with Diffused Aeration System costing about Rs. 1.31 Crore.
The Decanter Centrifuge costing Rs. 24.18 lacs was
installed. The CETP capacity thus was increased to 12.5 MLD.
Meanwhile, the process of coming up of new
units in the industrial area and existing units expanding
their production capacities started and resulted in the
increase of the effluent quantity considerably. Therefore,
Taloja CETP Society decided to go for the expansion of CETP
by another 10 MLD. The additional 10 MLD Expansion Project
thus has been commissioned in February 2008 and is into
operation.
Thus the capacity of Taloja CETP became 22.5
MLD.
The detailed Project Report of the First
Phase was approved by NEERI, Nagpur and Second Phase was
approved by IIT, Mumbai.
The effluents after treatment are being
disposed in the creek through the HDPE disposal line.
For the on line measurement of various
parameter, CETP has installed On Line pH Meter, Dissolved
Oxygen and Flow Meter and connected to website. The
microscope with CCTV camera has been installed for the
microscopic observation of microorganisms in the biological
treatment unit i.e. Aeration Tank. The electrically driven
actuator valves with timer have been fitted for sludge
removal.
Hooter (alarm) system installed for
indication of overloading of scrapper mechanisms due to
accumulation of sludge.
The 20% amount of the project cost is
collected from the Member Industries as the capital
contribution, 30% amount is taken as loan from IDBI and
balance 50% is received from Maharashtra Pollution Control
Board (MPCB) - 5%, Maharashtra Industrial Development
Corporation (MIDC) - 20% and Ministry of Environment and
Forests, New Delhi (MoEF) - 25% as subsidy.
The operation and maintenance cost of CETP is
recovered from the member industries through Treatment
Charges (TC) and Hydraulic Charges (HC).
The breakup of capital cost of the CETP.
|
Sr. No. |
HEADING |
10 MLD OLD PROJECT
(Rs. in Lakhs) |
10 MLD EXPANSION PROJECT
(Rs. in Lakhs) |
|
1 |
Project Cost |
616.00
|
1,571.00 |
|
2 |
Industry Contribution |
142.00
|
580.84 |
|
3 |
IDBI Loan |
268.00
|
395.00 |
|
4 |
Subsidy -
|
|
|
MPCB |
20.80
|
78.55 |
|
|
MIDC |
83.20
|
314.20 |
|
|
MoEF |
102.00
|
202.41 |
|
|
TOTAL |
206.00
|
595.16 |
| |
|
|
|
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The category wise Effluent Treatment Charging Pattern
|
Category |
Status |
Hydraulic Charge |
Treatment Charges |
Penal Charges |
|
pH violation |
Excess COD (Kgs) |
Excess TSS (Kgs) |
|
SSI
(NP) |
Paid
Unpaid |
WC x Rs. 3.0
WC x Rs. 6.0 |
-
- |
-
- |
-
- |
-
- |
|
SSI (P) |
Paid
Unpaid |
WC x Rs. 3.0
WC x Rs. 6.0 |
WC x Rs.16.0
WC x Rs. 24.0 |
WC x Rs. 21/m3 |
-
|
Kg TSS x Rs. 21.0 |
|
SSI(P)
Pickling Ind. |
Paid
Unpaid |
WC x Rs. 3.0
WC x Rs. 6.0 |
WC x Rs.12.0
WC x Rs. 18.0 |
WC x Rs. 21/m3 |
-
|
Kg TSS x Rs. 21.0 |
|
SSI (P) Fisheries |
Paid
Unpaid |
WC x Rs. 3.0
WC x Rs. 6.0 |
WC x Rs. 9.0
WC x Rs.13.5 |
WC x Rs. 21/m3 |
-
|
Kg TSS x Rs. 21.0 |
|
LSI / MSI |
Paid
Unpaid |
WC x Rs. 3.0
WC x Rs. 6.0 |
-
- |
WC x Rs. 21/m3 |
Kg COD x Rs. 30.0 |
Kg TSS x Rs. 21.0 |
|
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The small scale industries (SSI) have to treat
their effluent for the preliminary treatment in
terms of pH adjustment, detoxification,
degreasing and removal suspended solids as per
MPCB Disposal Norms and Large and Medium Scale
Industries LSI & MSI) in addition to preliminary
treatment have to operate secondary / tertiary
treatment facilities before sending it to CETP
to achieve all the consented parameters within
MPCB limits.
1. SSI (NP) - Small Scale
Industry (Non-Polluting)
2. SSI (P) - Small Scale
Industry (Polluting)
3. LSI - Large Scale
Industry
4. MSI
- Medium Scale Industry
5. WC - Water
Consumption
6. COD
- Chemical Oxygen Demand
7. TSS
- Total Suspended Solids
8. Kgs - Kilograms.
9. MPCB - Maharashtra
Pollution Control Board
|
|
Taloja CETP co-op. Society Ltd. |
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PROJECT CONTRIBUTION PATTERN
|
|
Industry Category |
Polluting |
|
New Industries |
Old Industries |
|
Small Scale |
Rs. 75,000 /-
(Upto 50 m3/d)
and
Rs. 40,000 /-
(For every additional 50 m3/d or part
thereof) |
Nil
[Upto (existing + New <50m3/d)]
and
Rs. 40,000 /-
(For every additional 50 m3/d or part
thereof) |
|
Medium Scale |
Rs. 8,00,000 /-
(Upto 100 m3 / d)
and
Rs. 4,00,000 /-
(For every additional 100 m3/d or part
thereof) |
Nil
(New <150 m3 / d)
and
Rs. 4,00,000 /-
(For every additional 100 m3/d or part
thereof) |
|
Large Scale |
Rs. 10,00,000 /-
(Upto 100 m3/d)
and
Rs. 4,00,000 /-
(For every additional 100 m3/d or part
thereof) |
Nil
(New <150 m3/d)
and
Rs. 4,00,000 /-
(For every additional 100 m3/d or part
thereof) |
|
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Notes :
-
The above rates are based on water
consumption per day.
-
These rates are effective from 1st
January, 2004.
-
For Non-Polluting Industries, the
contribution are as below,
·
Small Scale Industry (SSI) : Rs. 10,000 /-
·
Medium Scale Industry (MSI) : Rs.
2,00,000 /-
·
Large Scale Industry (LSI) : Rs. As above
·
Project Affected People (PAP) : Rs. 6,000 /-
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TREATMENT PROCESS DESCRIPTION
The effluent generated by the industries is
collected through gravity lines in two
Collection Sumps, one near Ghot Village and the
other at CETP. From the Collection Sump near
Ghot village effluent is pumped to the
Collection Sumps at CETP. 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 Floating Aerators have been
installed in old plant and diffused coarse
aeration is there in expansion plant. The pH
correction is carried out with lime if required.
The effluent is pumped to flash mixer wherein
PAC is dosed with rapid mixing and led to
Clariflocculator to flocculate and settle
suspended solids as well as remove certain
portion of suspended organic matter.
The Suspended Solids settle down in Primary
Clarifloculator 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 Diffused Aeration System. 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 Waghivali
Creek by pumping through HDPE closed pipeline.
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 disposal by secured land filling as
per the consent conditions.
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