Discover our innovative and comprehensive solutions in water and effluent treatment for our elite clientele, spanning over almost three decades…


Welcome to Advent Envirocare, leaders in wastewater and industrial effluent treatment. With three decades of experience, we specialize in a wide range of solutions, including Effluent Treatment Plants (ETP), Common Effluent Treatment Plants (CETP), Zero Liquid Discharge (ZLD) facilities, Effluent Recycling Systems (ERS), Brine Concentration Systems (BCS), Raw Water Treatment Plants (WTP), and Sewage Treatment Plants (STP).

Our portfolio demonstrates our commitment to sustainability and environmental stewardship, featuring projects that address diverse industry needs. From wastewater recycling to pollutant removal, our team combines technical expertise with creative innovation to achieve optimal results. Join us in shaping a cleaner, brighter future for the next generations.


This largest greenfield Common Effluent Treatment Plant in India caters to as many as 125 textile processing, dyeing, and printing units of Ahmedabad, scattered around densely populated residential, commercial and industrial area. Designed to handle 150 MLD daily flow with a peak of 225 MLD, the project incorporates SCADA‐automated sump rooms to ensure quality and quantity compliance of the influent wastewater, closed conduit gravity main and a 100 MLD Common Effluent Treatment Plant based on advanced technology using continuous flow sequencing activated sludge process that surpasses the competing technologies in terms of reliability, operability and simplicity. Advent Envirocare conceptualized the entire project, got its environmental clearance, facilitated the grants from Central and State Governments, provided technology and engineering services and executed the project as the principal contractor


Novel Spent Acid Management (NSAM) is first-of-its-kind community waste acid exchange and by-product exchange project, unique in the world. Promoted by various chemical industrial estates of Ahmedabad and conceptualized and built by Advent Envirocare, this facility is a hub for receiving spent sulphuric acid generated by chemical processing industries in and around Ahmedabad. The spent acid is collected in separate tanks according to its strength and contamination and as far as feasible; it is exchanged out to other industries or CETPs for uses such as neutralization of alkaline waste (caustic waste from textile mercerizing) or recovering by-products such as ferrous sulphate crystals.The mixed acid that cannot be meaningfully exchanged is then neutralized using lime stone powder and hydrated lime and the resultant slurry is then filtered out using membrane filter press. The wet solid waste is almost entirely gypsum, which is stored in a large area and given out to cement industry for adding it in the cement bags as a setting agent. The facility can handle about 180 tons of lime and generate more than 500 tons of wet gypsum every day, while treating 1100 tons of spent sulphuric acid with an average concentration of 20%.


SEPD is a SPV promoted by a cluster of over 800 micro, small and medium enterprises that are involved in processing of textile in the capital city Jaipur of the state of Rajasthan. These units are located within residential and commercial establishments and were being shut down by authorities due to lack of effluent treatment and disposal facilities. Advent Envirocare provided the much needed “hand-holding” to this unorganized cluster and guided them out of the statutory disarray, conceptualized the entire project, got them the grants from Government and designed and built their 12.3 MLD Common Effluent Conveyance and Treatment Facilities Project. The project uses advanced biological treatment with Integral Clarifier Sequencing Reactor, Ultrafiltration, Multi-stage Reverse Osmosis with intermediate TMF-based softening and Turbine-Compressor based Evaporator-Crystallizer with recovery of sodium sulphate. The entire ZLD CETP has been accommodated in just 1.1 hectare plot and has one of the lowest operating costs among most operational ZLD-based CETPs in the country.


For the largest steel producer in the country, Advent provided a 16 MLD Zero Liquid Discharge Plant at its green field project in Orissa, offering 95% recovery through RO for a feed characterized by high hardness and silica level, amongst other impurities. The project incorporates high lime‐soda softening & dolomite treatment, MBR‐based Sewage Treatment, Multi‐stage RO for Desalination and Multiple‐effect Evaporator for disposal of RO Reject. The project uses TMF as pre-treatment to RO as well as for recycling of low TDS stream. Along with blow-downs and neutralized effluent streams, one of the major feed streams to this ZLD system is the effluent from Coke-Oven ETP, also executed by Advent Envirocare. The Coke-oven ETP handles an exotic effluent containing very high levels of phenol, COD, colour, ammonia, thiocyanate, cyanide and colour and treats them to the statutory norms, followed by subsequent water recovery in ZLD supplied by Advent.


For one of the largest integrated chemical manufacturing facilities in India, which was established immediately after India became independent, the challenge was to upgrade the existing internal centralized treatment plant that receives partially-treated wastewater from a plethora of manufacturing facilities within a huge campus that produces hundreds of chemical products on campaign-basis in diverse fields such as bulk chemicals, intermediates, aromatics, crop chemicals, colours, pharmaceutical chemicals, etc. Advent Envirocare worked closely with the customers’ top technical team over many months and evolved a concept of treating 15 MLD wastewater with high COD in a compact land parcel.  Utilizing most of the existing infrastructure, Advent Envirocare designed and built new biological treatment facility in the form of multi-stage AIS, followed by specialized high-capacity Pressure Sand Filters.  Also included in the upgrade is a brand-new Primary Treatment facility based on multi-stage Neutralization and High-Rate Solids Contact Clarifier.


India’s largest red-category-approved chemical industrial park in the Dahej PCPIR area was looking at establishing an ambitious Common Effluent Treatment Plant to handle high COD – high Nitrogen wastewater (5000 ppm and 250 ppm resp.) and selected Advent Envirocare as its design-build-operate partner. The first phase of this greenfield industrial park has 2.5 MLD CETP with scrapper-equipped Equalization Tank, DAF pretreatment, Biological Nitrification-Denitrification using AIS, post-DAF and tertiary PSF-ACF-Chlorination system, with provisions to add advance oxidation and additional bio-treatment stages if required in future. The treated effluent from the CETP is to be discharged to deep sea using the existing infrastructure at Dahej PCPIR.


When the foremost public-sector company of India in the steel sector decided to put up an Effluent Recovery System at its Burnpur (West Bengal) facility to recover usable water from their effluent, Advent Envirocare participated and won the bid for 110 m3/h system with a minimum recovery of 85% high-quality water for reuse. The incoming wastewater to the ERS was cooling tower blow-downs from multiple locations and the project involved tapping, collecting and transferring the wastewater to the new ERS system, which comprised of Dual Media Filters, Ultrafiltration and multi-stage Reverse Osmosis with various chemical dosing at various stages.  Advent Envirocare also took up all civil construction work for the project.


A well-known dyes manufacturer and Advent Envirocare’s long time customer gave the first breakthrough for our new technology offering, the Membrane-based Brine Concentrator.  For dye separation process involving nanofiltration, the permeate stream is the effluent and contains 4-5% NaCl with some dye that exerts COD in 2000-3000 ppm range and colour value in excess of 1000 Hazens.  Traditionally, this effluent was handled using thermal system, MEE, at a high operating cost.  Advent Envirocare’s Brine Concentrator was successfully installed to concentrate 325 m3/day feed stream with 4-5% TDS to 12.5%, reducing the MEE feed by upto 70%.  The Brine Concentrator is based on the concepts of Forward Osmosis and the concentration was achieved at pressures lower than 70 bar.


An agrochemicals giant opted for Advent Envirocare’s Brine Concentrator to minimize the operating cost of Multiple Effect Evaporator for a process stream having 4.3% TDS and about 3000 ppm COD.  The Brine Concentrator was successfully installed to concentrate 200 m3/day feed stream to 16.2%, reducing the MEE feed by upto 74%.  The Brine Concentrator is based on the concepts of Forward Osmosis and the concentration was achieved at pressures lower than 70 bar.


For this Indo‐Chinese joint venture dyestuff manufacturing company, Advent Envirocare provided the first‐of‐its‐kind combination of technologies to achieve zero effluent discharge for difficult wastewater. The effluent generated from manufacturing textile dyes is characterized by high COD of about 5000 mg/L, of which, 30-40% is non‐biodegradable ‘hard’ COD. Apart from this, it has very high colour value and has TDS in brackish range. This effluent is subjected to physicochemical treatment, first stage biological treatment using advanced bio-treatment technology in the form of Integral Clarifier Activated Sludge System (the AIS), second stage biotreatment using cross-flow Membrane Bioreactor technology and finally, a High‐Recovery multi‐stage Reverse Osmosis System. The facility recovers 90% of the effluent as reusable water while the balance 10% is recycled to the processor or disposed of using Multiple‐effect Evaporator, thereby achieving zero effluent discharge.


Advent Envirocare has designed and built (including civil construction) two coke‐oven WWTP projects for the steel giant’s old facility at Jamshedpur and the new greenfield project at Odisha to treat a highly complex effluent from coke‐oven and by‐products plant having high SCN, total CN, phenol in addition to high COD and BOD contents. The project involves oil & tar removal, equalization, diversion, influent cooling, DAF, an all‐new biologic nitrogen removal AIS and several other ancillary units to treat high COD, CN, phenol and tar content.  The treated effluent from the ETP at the Odisha unit further goes to the central effluent recycling and ZLD project, designed and built by Advent Envirocare.


For a Japanese company foraying in India for a rare earth metals projects at Vishakhapatnam, Advent Envirocare supplied a comprehensive Effluent Treatment Plant of 2.2 MLD capacity to remove heavy metals, oil & grease, and organics in high salinity acidic effluent. Major process stream in this challenging project had over 6000 ppm heavy metals and 1000 ppm O&G at 15% TDS, which was segregated and pre-treated. Neutralization and solids removal was crucial, and so was sludge dewatering using automatic filter presses. The plant was supplied by another Japanese Engineering and EPC major and achieved desired performance soon after initial stabilization. Advent Envirocare also supplied High Purity Boiler Feed Water Plant for this project.


For a Japanese company foraying in India for a rare earth metals project at Vishakhapatnam, Advent Envirocare supplied an ultra-high purity water treatment plant to feed their high-pressure boilers. The plant entailed two trains of Ultrafiltration-Reverse Osmosis-Mixed Bed IX process to provide 40m3/h x 2 product water with less than 0.1 microS/cm conductivity and less than 15 ppb of silica from 2.64 MLD feed having 1000 mg/L TDS and 50 ppm silica. The plant was supplied by another Japanese Engineering and EPC major and achieved desired performance from the onset. Advent Envirocare also supplied Effluent Treatment Plant for this project.


Taking up their fifth ETP project for this dyes manufacturing major based out of Surat, Advent Envirocare serviced the three-decade relationship with an expansion project of additional 6 MLD Effluent Treatment Plant besides the old 4.8 MLD facility that Advent Envirocare provided before 15 years.  The new facility involves biological nitrification-denitrification system for this high-strength wastewater with low biodegradability.  Tertiary PSF and ACF takes care of further reduction of COD and the master plan includes a membrane-based tertiary treatment set-up for future.


A fast-growing aromatic chemicals company with multiple facilities needed a significant upgrade and expansion in existing ZLD-based ETP facility with serious constraints of space.  Advent Envirocare took up the challenge and utilizing all the existing treatment units, upgraded and expanded the plant to 600 KLD while increasing the recovery through and getting high permeate quality recovered water of <50 ppm TDS. The project involved supplying a 600 KLD Submerged Membrane Bioreactor, UF, Lime Softening System for RO reject, a third-stage RO and a second-pass RO alongside the required ancillaries and SCADA-based automation.


For a greenfield multi-chemical manufacturing facility in Dahej PCPIR, the Effluent Treatment Plant was required to treat high-COD feed to the CETP inlet standards and Advent Envirocare provided a simple two-stage biological treatment based on AIS to achieve the same in a compact and operator-friendly plant.  The feed to the ETP depended on performance of upstream Stripper and MEE that handled the process streams directly and the customer wanted a back-up system to handle high COD before the ETP during upsets.  Advent Envirocare provided a batch Fenton Treatment System to partially oxidize the organics to meet the inlet design conditions of the ETP.  The two-tank treatment system was based on receive and treat philosophy to ensure nearly uniform feed to the ETP.


GESCSL is a co-operative body of industries of Vatva Industrial Estate who has put up a large Common Effluent Treatment Plant for 600+ member units, under directives of Gujarat High Court. The CETP was initially designed to treat 16000 m3/day wastewater (16MLD) when commissioned in April ’98, being the first major project for Advent. Primary treated influent raw wastewater had a COD of 3000 mg/L and a high salt content up to 25000 mg/L. The principal treatment units include Equalization Tank, Dissolved Air Floatation Unit, Advent Integral System (Integral Clarifier Activated Sludge System) and Decanter Centrifuge. Advent Envirocare was involved in this as Principal Consultant offering Technology, Engineering and Operational services for this first of its kind project in India.


Advent Envirocare undertook a major upgradation at the existing Common Effluent Treatment Plants catering to textile processing units of Pali in Rajasthan. The project involved Tilted Plate Separator for removal of oil & suspended solids, additional Equalization Tanks, mechanized Chemical Dosing Systems, replacement of existing Aeration System and mechanical dewatering using Decanter Centrifuges. The unit at Mandia Road treated 13.6 MLD flow while the one at Punayta Road treated 9.1 MLD flow. The upgradation was done on turnkey basis within 15 months. The project also involved Operation & Maintenance for 12 months.


For A reputed knit textile dyeing unit IN Tirupur, Advent Envirocare supplied RO‐based Effluent Recycling System way back in 2005 to recover and reuse 85% of the 65 m3/h (1.3 MLD) feed. The two‐stage triple‐array RO system with booster pump uses low‐fouling brackish water membranes to yield excellent quality of permeate. The plant used conventional RO pre‐treatment for the treated wash water, such as chlorination, coarse filtration, adsorption, chemical dosing and micro‐filtration. The reject from RO is evaporated in a 4‐effect evaporator provided by project partners, Chem Process.


For a new plant with an annual capacity of 15,000 tons at a chemical complex in Dahej, Advent Envirocare provided distinctive combination of technologies to manage multifarious waste-water from various streams in the plant. The effluent generated from the manufacturing unit is divided into 4 different streams–High TDS Organic Stream with TDS around 25% (max), Utility Stream with high level of Ca and Mg Hardness, Organic Stream with COD level of 6000 mg/L and Inorganic Stream. The Effluent Management Scheme includes Triple Effect Evaporator for High TDS Organic Stream. Organic Streams consisting of Plant wash and dilute aqueous streams were treated in ETP based on cross-flow Membrane Bio-reactor Technology while the Utility Streams from the plant was subjected to Primary Treatment followed by Ultra-filtration and RO System to re-use permeate in cooling tower make up and washing applications. Combined treatment capacity of all systems is about 3 MLD, wherein the Utility Stream UF‐RO System was designed for 120m3/h.


Advent Envirocare provided a fully‐automated Effluent Treatment Plant for a new large-scale paints manufacturing facility at Rohtak on EPC basis. The ETP can operate automatically based on PLC and is hooked up to plant’s DCS system. It involves batch treatment of process effluent high in COD, TSS & Oil & Grease with cascaded feed, automated chemical dosing, clarification and sludge dewatering. The biological treatment is in the form of integral clarifier activated sludge system (the AIS) and is followed by tertiary treatment to target 50 mg/L COD in the final outlet. The treated water is used for landscaping while during monsoon, it is recycled as cooling tower make‐up using an RO system.


This pharma giant opted for a “vertical” ETP to minimize the footprint to save on space as well as to minimize seepages. The ETP is a three‐tier structure with Equalization Tank on top, Primary Treatment in middle and Secondary Treatment at ground level. Tertiary Treatment and Filter Press for Sludge dewatering are also located at ground level. The ETP has a capacity of 160 m3/day and involves two‐stage biological treatment because of the high organic load in manufacturing bulk‐drugs (API).  The entire plant, including laboratory and control room, is accommodated in a space of just 200 m2.


Advent Envirocare provided new Zero Effluent Discharge System on a turn‐key basis to this fine chemicals plant put up by a large pharma company in India and later sold to a US major. The Project comprises of Sewage treatment plant and Effluent Recycling System (ERS) followed by Single Effect Evaporator System. The Sewage treatment plant is based on advanced Biological Treatment consisting of Fixed Film Reactor. The effluent from different sections in the plant is treated in ERS consisting of cross-flow Membrane Bioreactor followed by RO System.


This pharmaceutical major wanted a reliable and cost-effective solution to handle high COD effluent for its expansion at its API unit in Dahej SEZ.  The wastewater flow was 150 KLD with a COD of 15000 mg/L, with the target to achieve disposal standard of 250 mg/L.  Advent Envirocare took up this challenging project and constructed the plant during the pandemic, successfully meeting the desired norms.  The project involves two-stage biological treatment using Advent Envirocare’s proprietary AIS technology, followed by tertiary filters.

Our Achievements

In our three-decade journey, Advent Envirocare has completed nearly 150 projects, including India's largest CETP, of its kind. Pioneering ZLD facilities and ERS, innovating in BCS and WTP technology, and enhancing public health with advanced STP solutions, we remain dedicated to sustainability and excellence.
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