unilax

Sewage Treatment Plant

Water Treatment Plant in Kolkata

Sewage Treatment Plant Manufacturer & Supplier in India

Unilax Industries Pvt. Ltd. is one of the leading Sewage Treatment Plant (STP) Manufacturer and Supplier in India, providing advanced wastewater treatment solutions for residential, commercial, institutional and industrial applications. Our sewage treatment plants are designed to efficiently treat domestic wastewater and sewage and make the treated water suitable for reuse or environmentally safe discharge as per CPCB and SPCB guidelines.

We are based in Kolkata and serve clients across India. We specialize in design, manufacture, supply, installation and commissioning of customized STP systems for reduced freshwater consumption, lower environmental impact and sustainable water management. Whether you need a compact STP for a residential society or a large capacity sewage treatment system for a commercial or industrial project, Unilax offers reliable, energy efficient and cost effective solutions as per your requirements.

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Why Choose Our Sewage Treatment Plants?

Key Benefits

  • Custom STP Solutions for Residential, Commercial and Industrial Projects
  • Compact and energy efficient plant designs
  • Compliance with SPCB and CPCB discharge standards
  • Low maintenance and operating costs.
  • Superior performance with advanced treatments
  • Total design, installation, commissioning & AMC support

Get a Customized STP Solution for Your Project Today.

What is a Sewage Treatment Plant (STP)?

Sewage Treatment Plant (STP) is a type of wastewater treatment plant that treats domestic sewage to remove organic matter, suspended solids, pathogens, oil, grease and other pollutants. The primary purpose of the STP is to treat the wastewater and convert it into treated water that can be safely discharged into the environment or reused for non-potable purposes such as gardening, flushing, cooling towers, and industrial processes.

Stringent environmental norms and water scarcity have made sewage treatment plants a part and parcel of residential townships, hotels, hospitals, educational institutions, office complexes, manufacturing units and municipal infrastructure projects.

An STP that is well designed not only protects the environment, but also reduces significantly freshwater consumption and operating costs by recycling and reusing water.

Types of Sewage Treatment Plants We Offer

Unilax Industries designs and manufactures sewage treatment plants that use different technologies depending on the needs of the project, available space, treatment standards and budget.

Activated Sludge Process (ASP) STP

A biological treatment system , a common one used to treat domestic sewage , and with a reliable and proven performance

Moving Bed Biofilm Reactor (MBBR) STP

Compact and efficient treatment technology using biofilm carriers for higher treatment efficiency with smaller footprint.

Sequential Batch Reactor (SBR) STP

An advanced wastewater treatment process where equalization, aeration and clarification are all carried out in one reactor for improved quality of treatment.

Membrane Bioreactor (MBR) STP

High performance treatment technology that combines biological treatment and membrane filtration achieves excellent quality of treated water.

Prefabricated & Packaged STP

Compact and Modular Sewage Treatment Plants are suitable for Residential Complexes, Hotels, Hospitals, Schools and Institutions where space is a concern.

Customized STP Solutions

We tailor designed sewage treatment systems to influent characteristics, discharge requirements and project specific needs.

STP Treatment Process at Unilax

Our sewage treatment plants use systematic treatment process to ensure the effective removal of contaminants and consistent treated water quality.

1. Preliminary Treatment

Screening systems, grit chambers and oil & grease traps remove large particles, plastics, sand and floating materials from wastewater.

2. Primary Treatment

The suspended solids are removed in the primary settling tanks and the organic load to the biological treatment stage is reduced .

3. Biological Treatment

Aeration systems with ASP, MBBR, SBR or MBR technology allow microorganisms to digest organic contaminants reducing BOD and COD content.

4. Secondary Clarification

Secondary clarification processes remove biological solids from the treated water.

5. Tertiary Treatment

To improve the quality of treated water and to remove pathogens, filtration, activated carbon treatment, chlorination or UV disinfection are used.

6. Sludge Handling

The generated sludge is thickened, dewatered and disposed of in a safe manner in accordance with environmental regulations.

The treatment process guarantees that the treated water is always in compliance with the CPCB / SPCB standards for discharge and reuse.

Applications of Our Sewage Treatment Plants

Our STP systems are widely used across various sectors requiring efficient sewage management and water reuse.

Residential Sector

  • Apartment Complexes
  • Gated Communities
  • Residential Townships
  • Housing Projects

Commercial Sector

  • Hotels & Resorts
  • Shopping Malls
  • Office Buildings
  • IT Parks
  • Convention Centers

Institutional Sector

  • Hospitals
  • Schools & Colleges
  • Universities
  • Hostels
  • Government Buildings

Industrial Sector

  • Manufacturing Facilities
  • Food Processing Units
  • Pharmaceutical Industries
  • Textile Industries
  • Industrial Townships

Municipal Infrastructure

  • Community Sewage Systems
  • Municipal Wastewater Projects
  • Smart City Developments

Our STP solutions are successfully operating across Kolkata, Delhi NCR, Mumbai, Bengaluru, Hyderabad, Chennai, Pune, and other major cities throughout India.

Why Choose Unilax for Sewage Treatment Plants?

Water Treatment Expertise

Water Treatment Knowledge How We have extensive experience designing water and wastewater treatment solutions for a variety of industrial and infrastructure projects.

Customized Plant Design

The design of each sewage treatment plant depends on the influent quality, variation of flow, space availability and the requirements of treated water.

Energy-Efficient Systems

Our STP designs are aimed at reducing power consumption and operating cost.

Easy Operation & Maintenance

Plant operation and maintenance complexity is reduced with operator-friendly layouts and automation options.

Complete Project Execution

We provide end-to-end services from design and engineering to manufacturing, installation, commissioning, operator training and AMC support.

Regulatory Compliance

We design our treatment systems to meet CPCB & SPCB environmental standards to give a sustainable and long term solution.

Sewage Treatment Plant Technical Specifications

The following specifications represent typical design ranges. Actual configurations are customized according to project requirements.

Capacity Range

  • 10 KLD to 1 MLD+

Treatment Technologies

  • ASP
  • MBBR
  • SBR
  • MBR

Inlet BOD

  • Up to 300–350 mg/L

Outlet BOD

  • ≤ 10–20 mg/L

Construction Material

  • RCC
  • FRP
  • Mild Steel

Automation

  • Manual
  • Semi-Automatic
  • Fully Automatic

Power Supply

  • 415V, 3-Phase, 50 Hz

Water Reuse Options

  • Gardening
  • Flushing
  • Cooling Towers

Customized capacities and treatment standards can be provided based on project requirements.

Benefits of Installing a Sewage Treatment Plant

Water Conservation

Treated wastewater can be reused, significantly reducing freshwater consumption.

Lower Operating Costs

Water recycling minimizes water procurement and disposal expenses.

Environmental Protection

Proper treatment prevents pollution of natural water bodies and groundwater sources.

Regulatory Compliance

Helps organizations comply with local environmental regulations and discharge standards.

Sustainable Operations

Supports green building initiatives and sustainable water management practices.

Get a Quote

How can I get a quote for an STP?

Simply share your sewage flow rate (KLD), project location, application type, and treatment objectives with our team, and we will recommend the most suitable solution.

Get a Custom STP Solution for Your Project

If you are looking for a reliable Sewage Treatment Plant Manufacturer in India, Unilax Industries Pvt. Ltd. offers customized, cost-effective, and environmentally compliant wastewater treatment solutions for residential, commercial, institutional, and industrial projects.

From concept and design to manufacturing, installation, commissioning, and after-sales support, we deliver complete turnkey STP solutions tailored to your requirements.

Contact Our Team Today

Call: +91 98300 49878 | +91 81004 45055 | +91 99030 38705

Email: info@unilax.co.in

Frequently Asked Questions

What factors determine the cost of a sewage treatment plant?

The cost varies depending on plant capacity (KLD), treatment technology, level of automation, extent of civil work, discharge standards and site specific requirements.

Routine maintenance is monitoring of pumps and blowers, sludge management, MLSS monitoring, filter cleaning, chemical dosing (if applicable) and periodic inspections.

Yes. Treated water can be reused for gardening, flushing, floor washing, cooling towers and selected industrial applications, depending on the treatment level achieved.

The proper technology depends on space availability, wastewater characteristics, budget, and desired treated water quality. MBBR, SBR and MBR are the popular choices for modern installations.

It is better to include the requirements of sewage treatment during the early stages of architectural and plumbing design to optimize space and infrastructure planning.

Yes. We are providing installation, commissioning, operator training, preventive maintenance, spare parts support and Annual Maintenance Contracts (AMC).

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