Urban water supply and sanitation are important basic needs for the improvement of the quality of life and enhancement of productive efficiency of the people. In urban areas, water is tapped for domestic and industrial uses from rivers, streams, wells and lakes. Almost 80% of the water supplied for domestic use comes out as wastewater. In most of the cases wastewater is let out untreated and it either sinks into the ground as a potential pollutant of ground water or is discharged into the natural drainage system causing pollution in downstream areas.
According to the Central Pollution Control Board, municipal sewage may be defined as “Mostly liquid waste originating from a community; may be composed of domestic wastewaters and/or industrial discharges”. It is major source of water pollution in India, particularly in and around large urban centers. In India about 78% of the urban population has access to safe drinking water and about 38% of the urban population has access to sanitation services.
With the enhancement of drinking water supply to urban areas, the wastewater generation is increasing. If such wastewater is not collected, treated and disposed properly, it will directly contribute to pollution of the locally available freshwater supplies. Additionally, the cumulative results of untreated wastewater can have broad degenerative effects on both public health and ecosystem.
Urban environmental management is one of the most pressing issues as the urbanization trend continues globally. Among the challenges faced by urban planners is the need to ensure ongoing basic human services such as the provision of water and sanitation. The accumulation of human waste is constant, and poorly managed wastewater contributes to the contamination of local freshwater supplies. Also, unmanaged wastewater can have degenerative effects on both public and ecosystem health.
Tatva understands these issues, and is committed to providing efficient and cost effective wastewater management services to its clients.
Ahmedabad Urban Development Corporation (AUDA) - Sewage Treatment Plant
Tatva is setting up a remarkable project of 240 MLD capacity sewage treatment plant (STP) for AUDA in Ahmedabad, Gujarat based on the conventional mode of treatment, i.e. activated sludge process followed by secondary clarifier. This STP has been segregated in 4 modules, each having a capacity of 60 MLD average, and 135 MLD peak flow.
Each module has its own primary & secondary treatment section, along with sludge thickening & digestion facilities. Also, available are common facilities for disinfection of biologically treated water, biogas collection & flaring, supernatant/filtrate collection & recirculation system, collection of digested sludge & digested sludge dewatering system, along with common chemical preparation & dosing facilities.
Treated sewage, as per the prescribed norms, shall be disposed off into the nearby Sabarmati river.
Ganga Pollution Control Unit, Uttrakhand Pey Jal Nigam - Sewage Treatment Plant.
Tatva has set up a 27 MLD capacity Sewage Treatment Plant (STP) based on the ASP followed by Sequential Batch Reactor (SBR) technology, in Haridwar, Uttaranchal for the treatment of sewage generated at Ganges river after the Kumbh Mela.
The technology is based on cyclic activated sludge process, using fine bubble diffused aeration system to provide the required oxygen and to keep the C-Tech basins contents in a completely mixed state. It provides the highest treatment efficiency possible in a single step biological process. Treatment system is operated in a batch reactor mode, which eliminates all the inefficiencies of continuous processes. Two or more modules are provided to ensure continuous treatment. The complete process takes place in a single reactor, within which all biological treatment steps take place sequentially.
Municipal Corporation of Delhi - Waste Water Treatment Plant
Tatva has set up a wastewater treatment plant using the technology of DAF (Dissolved Air Flotation) followed by UASB, AB process, chlorination & dual media filtration, with a capacity of 1.75 MLD, for the treatment of waste water generated from the slaughter house at the food processing complex of the Municipal Corporation of Delhi in Ghazipur.
As wastewater contains high suspended solids, a fine screen has been provided to remove the floating impurities. This is followed by raw water collection & pumping, dissolved air floatation & finally wastewater equalization. The waste water is treated with an up-flow Anaerobic Sludge Blanket technology, which has a compact plant design, less capital cost, less power consumption, low sludge production and produces methane energy as a byproduct. This treated wastewater will then be reused for the irrigation and development of the green belt around the facility.
Hindustan Construction Company (Lavasa Corporation) - Sewage Treatment Plant (Recycle plant)
Tatva has set up a 2.4 MLD capacity Sewage Treatment Plant in Dasve village for Lavasa Corporation, Pune, to treat the domestic sewage produced from the housing resort using the Activated Sludge Process technology. Part of the treated sewage is being recycled for domestic secondary use like flushing and gardening.
This is the first Sewage Treatment Plant (STP) of its kind in India where sewage is given such a comprehensive secondary as well as tertiary treatment, and where multiple treatments are provided for disinfection before reuse.
Sewage Treatment Plant at Nerul, Navi Mumbai
Based on the Cyclic Activated Sludge process, this plant has been set up for a municipal corporation and has a capacity of 100 MLD. This plant is based on the PLC automation system.
Mundra SEZ Textile & Apparel Park Pvt. Ltd. - Common Effluent Treatment (CEPT)
Tatva is setting up a 2.5 MLD Common Effluent Treatment Plant (CETP) at Mundra Port & SEZ Ltd., in the District of Kutch. CETP is being set up for the treatment of the wastewater generated from the industries of Mundra SEZ.
The treatment technology is based on the conventional mode that is Activated Sludge Process followed by a secondary clarifier.
Reline Engineers Associates Pvt. Ltd. - Sewage Treatment Plant (STP)
Tatva has set up this Sewage Treatment Plant (STP) based on the Chemo Autotrophic Activated Carbon Oxidation (CAACO) technology, with a capacity of 2.05 MLD, for the treatment of domestic sewage generated from corporate premises in Reliance Corporate Park - Nocil, Navi Mumbai.
CAACO is an aerobic treatment technology which immobilizes specially developed micro-organisms/ bacteria in the pores of activated carbon matrix. It is self sustained & once installed the carbon matrix does not require to be changed. Biomass production is negligible, thereby avoiding sludge handling or dewatering issues.
Out of the plant's total capacity, 820m3/day treated water will be further treated with softener to soften water for HVAC use. Also, the treated water will be reused for flushing and horticultural purposes within the corporate premises.
Oberoi & Raheja - Sewage Treatment Plant based on MBR technology
Utilizing the Membrane Bio-reactor Technology with a capacity of 0.55 MLD, 0.40 MLD & 0.35 MLD, Tatva has executed the recycle & reuse project of domestic and industrial sewage for some of the largest players in the Indian private sector like Raheja and Oberoi Group - Mumbai, Maharashtra, on a BOOT basis.
One of the projects is located in the basement of the commercial mall of Raheja Group. Treated water is being used for the processes of air conditioning in the commercial complex, and flushing and gardening for residential facilities.
For the execution of the project, Tatva has partnered Kubota Corporation, Japan. This project is being done on BOOT basis for 10 years & has successfully completed 2 years of operation and maintenance.
Jodhpur Pradushan Niwaran Trust - Up-gradation of Primary treatment plant of CETP
Tatva setup the upgradation of primary treatment section of Common Effluent Treatment Plant (CETP) with a capacity of 2.5 MLD for the treatment of acidic effluent generated from textile (Dying units) industries and steel rolling mills in Sangaria, Jodhpur, Rajasthan. The Plant uses Activated Sludge Process for this treatment.
Sterlite Industries Limited - Effluent Treatment Plant
Tatva has set up the revamping of a waste acid treatment plant (using the sodium sulfide route) for the treatment of effluent generated in the gas cleaning plant during the production of sulfuric acid in Tutikorine, Tamil Nadu.
Effluents in the gas cleaning plant are highly acidic and corrosive, therefore they are being handled and treated with utmost care and concern for the environment, health and safety.
Enviro Technology Limited (ETL) - Modernisation of Common Effluent Treatment Plant (Primary section)
ETL has its own 1.8 MLD capacity Common Effluent Treatment plant for the treatment of effluent (Raw acidic wastewater) generated from surrounding industries in Ankleshwar, Gujarat. For the expansion and modernization of the existing treatment facilities, Tatva has developed a primary treatment facility parallel to the existing facility for the treatment of the same capacity of wastewater. This facility mainly consists of neutralization tanks; clarifier/thickener; sludge sump, SBC shed & associated mechanical, electrical & instrumentation works.
Wastewater from diversified industries like dyes, dyes intermediates, pharmaceuticals, pigments, chemicals, pesticides, paints & coatings etc. are treated here using the neutralization followed by clarification process.
Enviro Technology Limited (ETL) - Modernisation of Common Effluent Treatment Plant (Secondary section)
Tatva undertook the expansion of the Common Effluent Treatment Plant (secondary treatment facilities) at ETL to increase the treatment capacity of waste from 2500m3/day to 3500 m3/day. This has been achieved by replacing the current Surface Aerator System to the Diffused Aeration system with a capacity of 2.5 MLD in Ankleshwar, Gujarat.
Reliance Industry Limited (RIL) - Waste Water Treatment Plant using UASB Technology
Tatva set up a waste water treatment plant to treat 7.44 MLD of waste water from the PTA Plant in RIL Hazira, Gujarat, utilizing the Up-flow Anaerobic Sludge Blanket Reactor (UASB) technology.
The UASB technology utilizes the high COD reduction capacity of especially cultured granular biomass which leads to a smaller sized reactor, minimum use of energy, and elimination of secondary clarification systems.
In addition, the plant efficiently converts the destroyed COD to Biogas, which is used as fuel in fired heaters, thereby minimizing the payback period. This technology minimizes the generation of fresh biomass, resulting in only about 2-3 % of COD being destroyed, as against 25 % of COD being destroyed using Conventional Activated Sludge Systems, hence minimizing the sludge disposal cost.
Biocon Ltd. - Effluent Treatment plant based on UASB Technology
Tatva has set up a 1.16 MLD capacity effluent treatment plant based on Up-flow Anaerobic Sludge Blanket Reactor (UASB) technology for the treatment of pharmaceutical wastewater in Bengaluru, Karnataka.
Wastewater has been classified in 4 different streams i.e. A, B, C & D, based on the nature of waste characteristics like organic load, TDS and pH parameters. After carrying out various studies for the treatment of waste, Tatva developed treatment schemes like neutralization followed by clarification for pre-treatment of stream B & D & equalization along with waste of stream C prior to the combined treatment. Combined treatment mainly includes physicochemical treatment, followed by secondary biological section which consists of UASB reactors, followed by processing in the aeration tank.
Another byproduct, i.e. the chemical and bio sludge generated from this plant, is fed to dewatering systems to concentrate the sludge quantity for disposal. Also, the Biogas generated from the anaerobic section is collected in biogas holders for use as a source of fuel in the incineration process.
Sabic Research Laboratory - Effluent Treatment Plant
Tatva has set up a wastewater treatment plant for waste water being discharged from the Sabic Research Laboratory, (Sabic is one of the world's largest Petrochemical companies) located in Savli , Dist. Baroda, Gujarat.
The effluent treatment plant was designed and constructed to give flexibility to the operation and to accommodate variations in the effluent discharge pattern & characteristics. The resultant plant was a compact plant equipped to treat any of the parameters contributing to the pollution potential, and to accomplish the Company's policy of zero discharge.
Reliance Industry Limited (RIL) - Effluent Treatment plant based on EGSB followed by UASB technology
Capacity: 3.00 MLD
One of the model projects executed by Tatva is revamping of PTA facilities in RIL. This Effluent Treatment Plant is based on a two-stage anaerobic treatment technology i.e. Expanded Granular Sludge Blanket (EGSB) followed by Up flow Anaerobic Sludge Bed Reactor (UASB) processes for the treatment of effluent generated from the PTA complex in Patalganga, Maharashtra.
This treatment process generates Biogas containing more than 65-70% methane gas. RIL has won the ICMA award for this project.
Veraval Industries Association - Conveyance system & Common Effluent Treatment Plant
Tatva has set up a conveyance system for effluent and a Common Effluent Treatment Plant (CETP) with a capacity of 5 MLD based on the Expanded Granular Sludge Blanket (EGSB) followed by the Up flow Anaerobic Sludge Bed Reactor (UASB) technology for the treatment of effluent / waste water generated from the fisheries and food processing industries in Veraval, Gujarat.
The scope of work included route survey, laying pipe lines, construction of pump house with flow measuring meters including collection of effluent for the conveyance of effluent generated from 42 member industries up to the CETP, and also the design, engineering, construction and commissioning of CETP. The treatment scheme consisted of waste screening, oil & grease removal, and equalization to equalize the waste in terms of flow & strength. A fine pore diffused aeration system also results in power savings, when compared to conventional surface aerator systems & coarse bubble aeration.
Enviro Infrastructure Company Limited - Common Effluent Treatment Plant using the ASP Process
Tatva has set up a Common Effluent Treatment Plant (CETP) with a capacity of 2.25 MLD for the treatment of effluent generated from 27 member industries comprising of various chemical, pharmaceuticals & dye manufacturing units located in the surrounding ECP channel in Vadodara, Gujarat.
The treatment scheme consists of primary, secondary & tertiary treatment. Salient features include the establishment of a two-stage activated sludge process for treating the waste to meet the standards of disposal. The sludge produced is dried in sludge drying beds and is then carried for a secured land fill.
Sewage Treatment Plant at Bhandewadi, Nagpur:
50 MLD Sewage Treatment Plant at Erandwane, Pune
45 MLD Sewage Treatment Plant at Mundhwa, Pune
50 MLD Sewage Treatment Plant at Tanajiwadi, Pune
1.35 MLD Sewage Treatment Plant at Goa
160 MLD Sewage Pumping Station at Kasabapeth, Pune
100 MLD Sewage Pumping Station at Bhandewadi, Nagpur
Solid waste can broadly be classified into two categories.
Throughout the developing world, the provision of water supply ...
Waste-to-energy or energy-from-waste is the process ...