Industrial wastewater treated to the limits in your consent to operate — or recycled back into the plant.
An effluent treatment plant treats the wastewater an industry generates — process effluent, floor and equipment washings, CIP water, scrubber and utility blowdown — so that it can be legally discharged to a drain, a CETP or land, or reused inside the factory. In India the outlet limits come from the Environment (Protection) Rules and the unit's consent from the State Pollution Control Board: typically pH 5.5–9, BOD ≤ 30 mg/L, COD ≤ 250 mg/L, TSS ≤ 100 mg/L, oil & grease ≤ 10 mg/L, plus industry-specific parameters such as colour, phenol, ammonia, chromium or TDS.
No two effluents are alike, so an ETP is designed backwards from the inlet: flow and its daily variation, pH, BOD, COD, TSS, TDS, oil & grease, temperature, and the industry-specific pollutants. That characterisation decides which of the treatment stages below are needed and how large each one is.
Proven, flexible, low capital; needs space and attentive operation.
Biofilm on plastic carriers — compact, robust to shock loads, easy to upgrade an existing tank.
Submerged fixed-film media; simple and stable for medium loads.
Membrane bioreactor — smallest footprint and reuse-grade outlet; higher power and membrane cost.
For COD above ~3,000 mg/L; produces biogas, saves aeration power.
Dissolved-air flotation for oily, fatty or light-solid effluents (food, dairy, refinery).
Hydroxide/sulphide precipitation for chromium, nickel, zinc, copper, fluoride.
Membrane recovery plus evaporation where discharge is not permitted.
Sampling and inlet characterisation → process selection and mass balance → PFD, P&ID and equipment sizing → civil and mechanical drawings → BOQ and procurement → erection supervision → seeding, commissioning and performance guarantee test → O&M. As a packaged skid for small capacities, or a site-built turnkey plant for large ones.
It depends on flow, inlet strength and the outlet required. A simple physico-chemical plant for low-strength effluent costs a fraction of a high-COD pharma ETP with anaerobic, aerobic and ZLD stages. Send your inlet analysis and flow — we give a budget range within one working day.
Roughly 1–2.5 m² per KLD for a conventional plant, less for MBR or packaged units. Anaerobic and ZLD stages add area. We give a footprint with every preliminary scheme.
General standards under the Environment (Protection) Rules: pH 5.5–9, BOD ≤ 30 mg/L, COD ≤ 250 mg/L, TSS ≤ 100 mg/L, oil & grease ≤ 10 mg/L, with industry-specific limits for parameters such as colour, phenol, ammonia, chromium and TDS. Your consent to operate from the State Pollution Control Board states the exact limits that apply.
Yes — after tertiary filtration and, where needed, UF and RO, treated effluent is commonly reused for cooling towers, floor washing, gardening and, in many plants, process make-up. Reuse reduces fresh-water cost and is mandatory in ZLD areas.
A packaged skid for small capacity: 8–12 weeks. A site-built turnkey plant of a few hundred KLD: 5–8 months including civil work, followed by 4–8 weeks of biological seeding and stabilisation.
Share your inlet analysis, capacity and location — we reply with a preliminary scheme and budget range within one working day.