Domestic wastewater from buildings and towns treated for safe discharge and everyday reuse.
A sewage treatment plant treats domestic wastewater — toilets, bathrooms, kitchens, laundries — from residential complexes, hotels, hospitals, offices, campuses and municipalities. Unlike industrial effluent, sewage is predictable: BOD 200–350 mg/L, COD 400–700 mg/L, TSS 200–400 mg/L, high faecal coliform. The challenge is not chemistry but consistency — daily peaks, weekends, holidays, low-flow nights, and an operator who is usually not a chemist.
Modern STPs are built for reuse: treated water for flushing, gardening, road washing and cooling-tower make-up. Many state PCBs and municipal bye-laws mandate this for larger buildings, and it directly reduces fresh-water bills.
Moving-bed biofilm reactor — compact, forgiving, easy to operate. The default for most buildings.
Sequencing batch reactor — fill/react/settle/decant in one tank; good for municipal and variable flows.
Membrane bioreactor — smallest footprint and reuse-grade outlet without tertiary filters.
Simple, low-sludge; suited to institutions with land.
Civil tanks below podium with odour control and forced ventilation.
Factory-built units for sites without civil works or with a short timeline.
Population and peak-factor based sizing → technology selection against space, noise and reuse targets → civil and mechanical design → supply and erection → seeding and commissioning → operator training and O&M. Reuse-grade plants include UF and disinfection with online monitoring.
Sewage generation in residential buildings is about 100–135 litres per person per day (85–90 % of water supply). A 300-flat society at 4.5 persons per flat needs roughly 150 KLD. Hotels are sized per room, hospitals per bed, offices per person. We size from your occupancy, not a thumb rule.
For most housing societies and hotels a well-designed MBBR is the best balance of cost, robustness and outlet quality. MBR earns its premium where land is very tight or the treated water has a high-value reuse. SBR suits institutional and municipal plants with trained operators. See our comparison article in the Knowledge section.
Yes — that is the standard reuse. With tertiary filtration and disinfection the outlet meets reuse norms for flushing, landscaping and cooling-tower make-up. MBR outlet can go further.
A correctly designed and operated plant does not. Odour comes from undersized aeration, poor sludge removal or open tanks in the wrong place. We design covered inlet works, adequate aeration and, where needed, biofilters.
Typically 0.6–1.5 kWh per m³ treated depending on technology — MBBR at the low end, MBR at the high end. We state the design power consumption in writing with every proposal.
Share your inlet analysis, capacity and location — we reply with a preliminary scheme and budget range within one working day.