Most plants that fail norms or run out of capacity do not need replacing. They need re-engineering — and we do it with the plant running.
Treatment plants are built for a design basis that stops being true within a few years: production grows, the effluent changes, norms tighten, reuse becomes mandatory, or the original technology was simply undersized. The civil tanks and most of the piping, however, last decades. A well-engineered retrofit re-uses that investment and delivers a compliant, larger or cheaper-to-run plant for 20–50 % of a new one — often inside the same footprint.
KK Enviro Engineers audits, re-designs and executes upgrades of ETPs, STPs, WTPs, RO/DM systems and ZLD trains built by anyone. We start from your operating data, not from a brochure.
+30–100 % in the same tanks by MBBR or MBR conversion.
Outlet brought inside consent limits without new civil work.
20–40 % reduction with fine-bubble diffusers, VFDs and DO control.
15–30 % reduction with engineered dosing and jar-tested products.
50–80 % of effluent recycled after UF/RO addition.
Disposal volume halved with mechanical dewatering.
Most retrofits executed with the plant online 80–90 % of the time.
As-built P&IDs and O&M manuals updated — the plant becomes maintainable again.
Industrial ETPs (pharma, chemical, textile, food, metal finishing), STPs for townships, hotels and hospitals, municipal STPs and WTPs, RO/DM plants for boilers and process, cooling water systems, and ZLD trains with under-performing evaporators. Built by us or by anyone else — the audit is where every retrofit begins.
Almost always. Tanks, civil structures and much of the piping usually have decades of life left; what fails is the process, the aeration or the operation. Converting an ASP tank to MBBR or MBR, adding a stage, or re-engineering the dosing typically costs a fraction of a new plant.
30–100 % is common. MBBR media in an existing aeration tank raises biomass without new civil work; MBR removes the clarifier and filters altogether; replacing coarse-bubble with fine-bubble diffusers adds oxygen capacity. The exact figure comes from the audit.
Usually only a short one. We phase work by train, use temporary bypass or tankers where needed, and schedule the tie-ins during planned production stops. Most retrofits run with the plant online for 80–90 % of the work.
Yes — after checking that the existing biology and tertiary stages can deliver the feed quality RO needs. We often upgrade pre-treatment first, then add RO, and size the evaporator for the minimum brine volume.
With a plant audit: inlet and outlet data review, equipment condition survey, sampling if data is missing, and a written report with options and life-cycle cost. Then you decide what to do.
Send the plant type, capacity, current inlet/outlet data and the problem — we reply with an audit plan and retrofit options within one working day.