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| CEMCOT - Pallavaram Tanners Industrial Effluent Treatment Co., (PTIETC) |
The Common Effluent Treatment Plant (CETP) at Pallavaram in Chennai treats around 3000 m3/day of wastewater from the tanneries in the cluster processing mostly semi finish to finished leather. The CETP at Pallavaram is named as Pallavaram Tanners Industrial Effluent Treatment Co., (PTIETC). It is about 3 km from the Chennai airport. Pallavaram is an industrial town in southern part of Chennai metro area and located on the Chennai-Tiruchi National Highway. There are nearly 200 tanneries operating in and around Pallavaram area. About 122 units in the Pallavaram cluster have established the CETP with a capacity of 3000 m3/day. Apart from the tanneries there are many downstream leather product industrial units, including shoes, garments and other leather goods factories. The total annual turnover of the Pallavaram leather industrial sector is in the order of Rs.1800 Crores.
The treatment process in the Pallavaram CETP includes primary physio-chemical treatment, followed by a secondary biological treatment and the treated effluent generally meets all parameters stipulated by the Tamilnadu Pollution Control Board (TNPCB), except for Total Dissolved Solids (TDS) which represents the salt (mainly chloride and sulphates) in the effluent. These salts are not removed by conventional treatment systems and need complex & expensive treatment such as Membrane System including Reverse Osmosis (RO).
With an aim to achieve all parameters of TNPCB including TDS and to minimise the drawal of fresh water from natural sources by the tanning industry, the management of the Pallavaram CETP (PTIETC) has initiated implementation of a Zero Liquid Discharge (ZLD) system by adopting RO for recovery of water from treated effluent and thermal evaporation for the management of saline reject from the RO system. The Pallavaram CETP, (PTIETC), joining with other six CETPs in Tamilnadu, formed an SPV by name M/s Chennai Environmental Management Company of Tanners (CEMCOT) for implementation of the project.
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| Project Details |
The ZLD system proposed in SIDCO-I1 CETP consists of the following: |
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CETP UPGRADATION : New mechanical screen, Optimization of primary and secondary clarifiers, Improved blowers and diffusers, Additional mechanical sludge dewatering system, Tertiary treatment to remove hardness and residual pollutants, Updated monitoring system |
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UF/RO SYSTEM IN NEW BUILDING : Post treatment including filtration, Ultra-filtration, Micro filter, Multiple stage Reverse Osmosis, Automatic Control System |
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MECHANICAL EVAPORATION/ RO REJECT MANAGEMENT : Multiple effect evaporation system , Additional system to reduce load to evaporator, Boiler system, Special centrifuge forseparation of salts, Control system |
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SALT DISPOSAL YARD : Special disposal unit with proper corrosive-resistant flooring, sidewall and roofing. The recovered salt is proposed to be collected in a leak proof polymer bags. |
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RECOVERED WATER / RESIDUAL WATER DISCHARGE MANAGEMENT : This includes overhead water tanks and piping network for conveying the recovered water back to individual tanneries. Individual tanneries have been advised to provide storage tanks for their use with required storage capacity.
ASSOCIATED COMPONENTS AND STANDBY PROVISIONS : Required associated components such as service roads, storm water drain, illumination, safety components, etc., will be provided to suit the field conditions and other operational requirements.
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| The implementation of the project was awarded to the Hyderabad based firm M/s Ramky Infrastructure Ltd. following two stage competitive tendering process. The contract value of the turnkey project is Rs.36 Crores. The total project cost including administrative charges is Rs.37.8 Crores. Department of Industrial Policy & Promotion (DIPP) of Government of India contributions to the tune of 50% of the projects cost, Government of TamilNadu contributing to the tune of 15% of the project and the balance of 35% project cost is borne by the Pallavaram CETP. |
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| Progress Status upto September 2011 |
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 Up-gradation of CETP with new screens, mixers in equalization tanks, new clarifier mechanism for primary and secondary unit, additional blowers, diffusers, chamber filter press etc., have been completed and the system is under operation for full capacity.
New building for RO system, tertiary treatment units, ultra filtration, Reverse Osmosis in the stages and recovered water, storage tanks etc. |
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New building with two floors has been completed in all respects for installation of UF / RO system. |
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All membrane units such as UF / RO Pressure vessel piping system / pumps have been supplied and erected during March / May 2011. The UF system has been loaded and tested during July /Aug 2010. Scheduled to be stabilized during Oct/ Nov 2011. |
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On stabilization of UF system, the two stage RO unit will be tested and stabilized from November 2011 onwards |
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| Recovered water storage tanks, recovered water distribution network, associated components |
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Main over head tank has been built in RCC. The system has been tested and ready for operation |
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70% (4 Kilometer) of the Pipe laying work has been completed. The balance work completed in another two months period. Due to narrow streets, restriction in operation hours in the public road more time is being taken for completing this job. |
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| Saline water evaporation, salt storage system with roof, associated works etc., |
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Base foundation works in the additionally purchased land by the CETPhas been completed. |
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Fabrication of evaporator system has been completed in the factory. The delivery and erection of evaporator has started from September 2011 onwards. |
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Technically these units are required at the final stage of the project. The completion of these items of work during Nov/ Dec 2011 will be matching the stabilization of UF/RO and financial deliveries from DIPP & Govt. of Tamilnadu. The CETP has made 100% remittance of their contribution to the project. |
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| Additional requirement over and above the project plan |
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Considering the anticipated quality of the saline reject stream with low TDS in Pallavaram CETP the performance of the evaporator recently installed in similar CETPs, the following additional treatment units are proposed to be imported and installed for the successful operation of the evaporation system. |
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Chemical treatment / filter |
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Special micro filter with self cleaning provision |
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Additional third level membrane unit etc., |
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| The above additional units are not originally envisaged in the project. The equipment will be imported and installed in a period of about four months. |
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| Project Location |
| Location of PTIETC- CETP, Pallavaram, Chennai Click the the map for larger view |
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| Project Photos |
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Overview of PTIETC CETP,
Pallavaram |
New Submersible Mixer in
Equalisation Tank |
New Chamber Filter Press
Under Operation |
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New Blowers For Aeration
System |
New Pressure Filters
(SAND/ CARBON) |
Reactor Clarifier With Feed Tank |
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| Electrical Panel For UF / RO System |
Organic Scavengers In RO Building |
Ultra Filtration (UF) System |
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| Multiple Stage RO System |
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| Contact details of the PTIETC |
CEMCOT - Pallavaram Tanners Industrial Effluent Treatment Co., (PTIETC)
No. 105, Anna Salai, Nagalkeni,
Chrompet, Chennai – 600 044
Telephone : 2238 6227 / 2241 6522.
Email: ptietc@yahoo.co.in |
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