STP site requirements: what to confirm before you order

Most delays in an STP project come from basic site facts that were not settled before the order. Check these first.

Flow and population

Design flow: Based on residents, rooms, beds or occupancy. We size on average flow and apply a peak factor for the inlet works and hydraulics.
Future expansion: Say now if more towers, rooms or phases are coming. Planning for it costs little; adding it later costs a lot.
Type of sewage: Domestic only, or mixed with kitchen, laundry, hospital or commercial discharge. This changes screening, oil and grease handling and disinfection.

Site and civil

Land: Available area and shape, and distance to the nearest building. Plant location also affects odour and noise planning.
Levels: Inlet sewer level, outlet level and slope of the site. This decides whether you need lifting pumps and how deep the tanks go.
Soil and groundwater: Bearing capacity and groundwater level affect tank design and cost.
Existing civil: If tanks already exist, share the drawings so the process can be fitted to them.

Power, treated water and permits

Power: Connected load available, supply stability and generator backup. Blowers are the largest load.
Treated water use: Flushing, gardening, cooling or discharge. This sets the treated quality and the tertiary stage.
Discharge norms and consent: The standard set by your pollution control authority, and the consent or approval process for your project.
Operator: Who will run it, and for how many hours a day. We design for the operator you will actually have.

Next step

Send these details with the RFQ checklist and we will reply with a scheme and budget range. Related: MBBR vs SBR vs MBR, packaged STP.

Common questions

How much land does an STP need?

It depends on flow and technology. MBBR and MBR plants are compact, SBR needs more tank volume. We give the footprint in the scheme once flow and site are known.

Can an STP be installed underground?

Yes, tanks can be below ground with equipment above or in a room. It affects cost, ventilation and access, so decide it early.

Who gets the consent from the pollution control board?

The project owner applies. We provide the process description, drawings and treated-water data that the application needs.

Need help checking your site?

Send what you have. We tell you what is missing and give a scheme within one to two working days.

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