STP, WTP and ETP contractor and consultant —sewage, water and effluent treatment plants with pollution-board compliance
Sewage, water and effluent treatment plants — process design, equipment and integration for reuse and statutory discharge norms.
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STP / WTP / ETP by Secured Engineers Pvt. Ltd.
Secured Engineers Pvt. Ltd. — an MEPF & solar EPC contractor and consultant with offices in Ludhiana, Punjab and Noida (Delhi NCR) — provides STP / WTP / ETP as part of its Plumbing scope: Sewage, water and effluent treatment plants — process design, equipment and integration for reuse and statutory discharge norms. 535+ projects across 18+ Indian states.
Enquiries: +91 70099 85817 · sales@securedengineers.com · request a project proposal
What this system decides for your project
Treatment plants are mandatory for occupancy and pollution-board clearance, and treated water reused for flushing/landscape sharply cuts fresh-water cost.
You need a quote for this if: Townships, hospitals, hotels and factories needing treatment & reuse.
Scope of work
The plant is designed from the influent — its flow, daily pattern and characteristics — and from where the treated water is going: flushing and landscape reuse, cooling-tower make-up, or discharge to the norms in the pollution-board consent. Process selection (MBBR, MBR, SBR, or a physico-chemical train for effluent) follows from that, then the tank sizing, the equipment — blowers, pumps, screens, clarifiers, filters, disinfection — and the PLC automation. We design the process, supply and install the equipment and pipework into the civil structure, and integrate the treated-water line into the building's dual plumbing.
How it is delivered — and what you receive
The plant is commissioned through seeding and stabilisation, with the treated-water quality tested against the consent parameters before reuse or discharge begins. Consent to establish is obtained before construction and consent to operate after commissioning, with the test results filed. The client receives the process design basis, the equipment list, the PLC logic, the commissioning results and the operating procedure the plant operator will follow.
Sources and standards
- IS 1172 (1993 (reaffirmed)) — IS 1172 — Code of Basic Requirements for Water Supply, Drainage and Sanitation. Bureau of Indian Standards. Publisher. Per-capita water requirements and sanitary provisions by building type.
- NBC 2016 Part 9 (2016) — National Building Code of India 2016, Part 9 — Plumbing Services. Bureau of Indian Standards. Publisher. Water supply, drainage and sanitation, and the per-capita demand basis.
Standards are cited to support the technical statements on this page. Where a standard has been revised, the edition shown is the one verified at the time of review; the edition in force for a project is the one the authority applies.
Before you ask us to quote: the Plumbing buyer's guide lists what to have ready, what drives cost and timeline, and the approvals that usually apply. Writing the tender? The plumbing & public health specification library has 4 code-referenced clauses architects and consultants can drop into tender documents.
Specify the treatment duty before requesting a plant quote
An STP treats domestic sewage, a WTP treats incoming water for its intended use, and an ETP treats process effluent. For a factory expansion, identify these streams separately before selecting a technology or comparing KLD prices.
What to send with your enquiry
- Site location, activity and whether this is a new plant, an expansion or a plant that is missing its outlet-quality target.
- Measured daily and peak flows, operating hours, recent inlet and outlet laboratory reports, and the water balance where available.
- The applicable consent conditions and intended discharge or reuse route; identify process effluent separately from domestic sewage.
- Available tank dimensions and space, existing process and equipment, power availability, and who will operate the plant.
Compare the same scope
Ask each bidder to state the design inlet load, outlet target, treatment stages and acceptance test. Compare civil works, sludge handling, tertiary treatment, automation, chemicals, operator support and reuse piping as separate scope items. A KLD rate alone does not establish that two plants will do the same job.
Hiring a stp / wtp / etp contractor — what to check
Treatment plants are the one utility where the regulator writes your specification. The State Pollution Control Board's consent conditions define the required outlet quality, and the plant is engineered backwards from that. A vendor who quotes a capacity before reading your consent is quoting a box.
- Design from the consent, not the catalogue. The discharge or reuse standard your consent sets, the load it must meet, and the variation in that load across a working day. Capacity in KLD alone is not a specification.
- Whether the outlet is discharge or reuse. Reuse to cooling towers, flushing or landscape changes the treatment train and usually the tertiary stage. Decide it before the plant is sized, not after.
- Monitoring obligations. Where continuous monitoring applies to your category, the provision for it is part of the plant, not an afterthought retrofitted at inspection.
- Sludge, and who deals with it. Sludge handling and disposal is the part every low bid leaves out and every operator discovers in month two. Get it in the scope.
- The plumbing interface. Someone has to own the line between the building drainage and the plant inlet. Where the plumbing and the plant are two contracts, that joint is where accountability disappears.
Makes we specify for STP / WTP / ETP
Tier-1 manufacturers whose equipment we design around and install. The specification names the make; the site is held to it.
Related to STP / WTP / ETP
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Need STP / WTP / ETP for your project?
Get a free consultation and quote. We design, prepare and file your approvals, and execute — you deal with one team.
Guides that reference this page
- PHE Contractor for a Factory: Scope, Licences and How to Hire One
- STP Cost for a Factory: Capacity, Technology Choice and What Drives It
- Expanding an STP: Check Both Hydraulic and Organic Load
- The Chiller Gave Three Weeks of Warning Before It Failed. Nobody Was Listening.
- The Site Is Insured. The Chiller That Failed on Test Is Probably Not.
- The Architect Wants Gold Certification. The MEP Scope Just Tripled.
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