+91 93211 61989kshitij@kkenviro.in
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STP for Housing Society & Residential Township

STPs are mandatory for larger residential projects, and the ones that fail are the ones nobody planned to run. We design society STPs that are easy to operate, cheap to run, odour-free — and we offer AMC so the committee never has to become plant operators.

The effluent and the norms

UDCPR Maharashtra and most municipal by-laws require an on-site STP for residential projects above a threshold (commonly 20,000 m² built-up or a set number of tenements), with treated water reused for flushing and gardening. Sewage is ~85 % of water supplied (about 110–135 L/person/day); loads are steady but the plant is often in a basement, run by a housekeeping contractor, and judged by odour and electricity bill.

Treatment train we design

  1. Screening and equalisationBar screen, 8–12 h equalisation with submersible pumps (1W+1S).
  2. BiologicalMBBR for simplicity and low power; SBR for larger townships; MBR where footprint or reuse quality demands.
  3. Settling and tertiaryTube settler, PSF/ACF; treated-water tank.
  4. DisinfectionHypochlorite dosing with residual, or UV, before flushing/garden reuse.
  5. SludgeSludge holding and periodic dewatering (bag filter or contract tanker).
  6. OperationAuto mode on level and timers; monthly service under AMC; annual compliance test.

Where we apply it

New residential projects
Design and supply with the builder; handover to society with training.
Existing societies
Revival of non-working STPs; retrofit to MBBR; AMC.
Gated townships
500–5,000 flats; SBR/MBR with large reuse.
Row-house and villa schemes
Decentralised or clustered small STPs.

How KK Enviro Engineers delivers

Sampling plan and inlet characterisation → process design (PFD, P&ID, sizing, BOQ) → supply, erection and commissioning → biological stabilisation → handover with O&M manual and training → AMC if you want us to stay. We also audit and upgrade plants built by others.

Frequently asked questions

What size STP does our society need?

Sewage ≈ 85 % of water consumption, about 110–135 L per person per day. A 200-flat society (~900 people) needs roughly 100 KLD. Use our STP sizing calculator or send occupancy.

Our STP is not working — can it be revived?

Usually yes. A two-week audit tells us whether it is a media/diffuser/blower issue, hydraulics, or operation; most revivals cost far less than a new plant.

What does AMC cost?

Depends on size and visit frequency; for a 50–150 KLD society STP, AMC with operator visits, chemicals and testing is typically a modest per-flat monthly figure. We quote after seeing the plant.

Send your effluent data

Flow, inlet analysis and required outlet — we reply with a scheme and budget range within one working day.