STP Construction Company & Sewage Treatment EPC Contractor India

VRSIPL constructs all civil structures within an STP — including RCC aeration tanks, clarifiers, digesters, sludge drying beds, inlet and outlet structures, sewerage pumping station (SPS) pump rooms, control buildings, electrical buildings, pipework trenches, boundary walls, and access roads within the plant. VRSIPL is the civil EPC contractor, not an equipment supplier.

An STP equipment supplier provides mechanical and electrical equipment such as blowers, membranes, pumps, and instrumentation. An STP civil contractor like VRSIPL constructs the physical plant — the RCC tanks, pump rooms, buildings, foundations, pipework trenches, and site infrastructure that house and support all equipment. VRSIPL specialises in the civil EPC scope of STP projects.

VRSIPL has executed STP civil works for plants ranging from 2 MLD (small urban towns and AMRUT towns) to 100 MLD (large municipal STPs for major cities), with a total constructed treatment capacity of 200+ MLD across 40+ projects in Gujarat, Maharashtra, Madhya Pradesh, and Rajasthan.

VRSIPL's STP civil clients include GWSSB (Gujarat Water Supply & Sewerage Board), municipal corporations (Ahmedabad, Surat, Vadodara, Rajkot), Smart City SPVs, and state urban development authorities executing projects under AMRUT and NITI Aayog-funded programmes. VRSIPL works as a main contractor and as a sub-contractor to large EPC firms.

Yes, VRSIPL has executed STP civil works under AMRUT (Atal Mission for Rejuvenation and Urban Transformation) and Smart City Mission across multiple cities. These projects typically involve STP civil construction combined with underground sewerage network laying, sewerage pumping stations, and associated infrastructure to create complete city sanitation systems.

VRSIPL has constructed civil structures for STPs based on MBBR (Moving Bed Biofilm Reactor), SBR (Sequencing Batch Reactor), and ASP (Activated Sludge Process) technologies. The civil tank design varies by process — MBBR requires specific reactor dimensions and carrier media holding structures, SBR uses intermittent fill-draw tank configurations, and ASP requires aeration tanks and secondary clarifiers. VRSIPL adapts the civil design to each process.

VRSIPL executes STP civil construction projects primarily in Gujarat, Maharashtra, Madhya Pradesh, and Rajasthan — covering major cities, AMRUT towns, and Smart City Mission areas. VRSIPL's STP civil teams are experienced in executing projects under state pollution control board (SPCB) norms applicable in each state.

VRSIPL constructs all STP RCC tanks to IS:3370 (Concrete Structures for Liquid Retention) with M-30 grade watertight concrete, controlled water-cement ratio, crystalline waterproofing additives, and structured construction joints with PVC water stops. All tanks undergo water tightness testing (leakage test) per IS:3370 Part 1 Annex B before handing over to the treatment equipment contractor.