ETP Manufacturer & Supplier — West Bengal
Turnkey effluent treatment plants for West Bengal's petrochemical, steel, jute, chemicals, food, and engineering industries — WBPCB-compliant ETP and ZLD systems across Kolkata, Howrah, Durgapur, Haldia, Kalyani, and West Bengal's Hooghly-Ganga basin industrial corridors
Industry Overview
ETP Manufacturer & Supplier — West Bengal
West Bengal is one of India's oldest industrialised states, with an industrial history stretching back to British India's Hooghly-side jute mills and engineering workshops in Kolkata and Howrah. Today, West Bengal's industrial base spans petrochemicals and refining (Haldia — India's most important chemical port complex), steel and heavy engineering (Durgapur — Durgapur Steel Plant and associated chemical industries), jute and textiles (Hooghly district — surviving jute mills and synthetic textile units), food and agro-processing (Kolkata's food manufacturing ecosystem, North Bengal's tea and fruit processing), and pharmaceuticals (Kalyani, Naihati — formulation manufacturers). Haldia is particularly significant: the Haldia Development Authority industrial zone hosts HPCL's major refinery, Haldia Petrochemicals (one of Asia's largest naphtha cracker complexes), Indian Oil, Tata Chemicals, Exide Industries, and dozens of downstream chemical manufacturers.
West Bengal Pollution Control Board (WBPCB) operates in a complex regulatory environment — the Hooghly river, a major distributary of the Ganga, flows past Kolkata and through the state's most industrialised districts, making it a direct concern for both NGT Ganga orders and NMCG monitoring. WBPCB has active enforcement programmes in Haldia (petrochemical discharge to the Haldi estuary), Durgapur (Damodar river basin), and the Kolkata-Howrah industrial belt. The East Kolkata Wetlands — a Ramsar site — are threatened by inadequately treated industrial and municipal effluent from Kolkata's eastern industrial zones. WBPCB has been active in issuing closure notices to tanneries at Tangra (Kolkata's tannery cluster) and chemical units along the Hooghly.
Spans Envirotech provides ETP and ZLD EPC services for petrochemical, chemical, food, and pharma sectors across East India. Our chemical ETP expertise — applicable to Haldia's complex industrial profile — and our food processing ETP capability for West Bengal's agro-industrial sector position us well for West Bengal's industrial base. We provide WBPCB consent documentation, process design, equipment supply, commissioning, and AMC for industrial clients across West Bengal.
Industry Challenges
Key Environmental Challenges
Petrochemical and Refinery — Haldia
HPCL Haldia Refinery and Haldia Petrochemicals generate large-volume process wastewater containing hydrocarbons, phenols, sulfides, and dissolved organic compounds. API separators for oil-water separation, DAF for emulsified oil removal, biological treatment (activated sludge or MBBR) for phenol and BOD reduction, and tertiary polishing are required before discharge to the Haldi estuary. NGT Ganga basin compliance requires highest-quality treatment for Hooghly tributary discharge.
Steel and Heavy Engineering — Durgapur
Durgapur Steel Plant and associated industries generate effluent from coke oven operations (phenols, cyanide, ammonia), blast furnace cooling, and rolling mill descaling (oil, scale, heavy metals). Specialised treatment — ammonia stripping, phenol biological oxidation, cyanide destruction, heavy metal removal — is required. Damodar river basin compliance (Damodar Valley Corporation jurisdiction) adds regulatory complexity.
Tannery Effluent — Tangra, Kolkata
Kolkata's Tangra tannery cluster is one of India's oldest and most challenged — chrome tanning effluent, sulfide from liming, and high-BOD wastewater from soaking and pickling in a dense urban zone. WBPCB has ordered ZLD for individual tanneries and enforced CETP connection. Chrome recovery, biological treatment, and advanced polishing are required. East Kolkata Wetlands proximity makes effluent management especially sensitive.
Chemical and Fertiliser — Hooghly Belt
The Hooghly industrial belt from Kolkata to Bhadreswar hosts diverse chemical, fertiliser, and specialty chemical manufacturers. WBPCB enforces CPCB standards with specific conditions for Hooghly river basin discharge — a key Ganga tributary monitored by NMCG. Chemical units generating complex organic, heavy metal, and nutrient-rich effluent require multi-stage advanced treatment.
Food and Tea Processing — Kolkata and North Bengal
Kolkata's food manufacturing ecosystem — biscuits, confectionery, packaged food, dairy — generates high-BOD effluent from production cleaning. North Bengal's tea processing generates tannin-rich, high-BOD effluent from withering, fermenting, and washing operations. WBPCB food sector CTO conditions require biological treatment before discharge to river systems.
Our Solutions
Tailored Wastewater Treatment Solutions
Petrochemical and Refinery ETP — Haldia
API oil-water separators for primary hydrocarbon removal, DAF for emulsified oil, biological activated sludge treatment for phenol and BOD reduction, and tertiary polishing to meet WBPCB Haldi estuary discharge standards. Integrated ETP design for large-volume refinery and petrochemical effluent. WBPCB CTO documentation.
Steel Industry ETP — Durgapur
Specialised ETPs for Durgapur steel sector — ammonia stripping, biological phenol oxidation (extended aeration), cyanide treatment, heavy metal precipitation, and secondary clarification. Damodar river basin compliance documentation and WBPCB CTO support.
Tannery ETP and ZLD — Tangra, Kolkata
Chrome recovery and recycling systems, sulfide precipitation, biological treatment for BOD/COD from soaking and beamhouse operations, and ZLD (RO + MEE/MVR) for Tangra tanneries subject to WBPCB ZLD orders. CETP pre-treatment design and East Kolkata Wetlands protection compliance.
Chemical ETP — Hooghly Industrial Belt
Multi-stage ETPs for Hooghly belt chemical manufacturers — physio-chemical pre-treatment, advanced oxidation (Fenton/ozone), biological treatment, activated carbon polishing. WBPCB Hooghly river basin CTO compliance documentation.
Food and Tea Processing ETP — Kolkata and North Bengal
DAF for fat and protein removal from Kolkata food manufacturers, MBBR biological treatment for tea processing tannin effluent, sludge dewatering, WBPCB food sector CTO documentation. Compact packaged ETPs for distributed North Bengal tea estates.
STP for Kolkata Commercial and New Town Sector
Compact MBBR and MBR-based STPs for New Town Kolkata IT parks, commercial complexes, and residential developments — WBPCB STP norms compliance and treated water reuse for Kolkata's water-stressed commercial zones.
Technologies
Proven Technologies for Your Industry
Benefits
Why Choose Spans for Your Industry
- WBPCB-compliant ETP systems — CTE and CTO documentation support
- Petrochemical and refinery ETP expertise for Haldia industrial complex
- Steel sector ETP capability for Durgapur cluster
- Pan-WB coverage — Kolkata, Howrah, Durgapur, Haldia, Kalyani, North Bengal
- Turnkey EPC from process design to commissioning and AMC
- NGT Ganga/Hooghly basin compliance — NMCG standards documentation
- Post-commissioning AMC for ongoing WBPCB compliance across West Bengal
- Founded 1993 — 30+ years of East India and pan-India ETP delivery
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