Turnkey Engineering in Sri Lanka

Sewage Treatment Plants (STP) & Package STPs in Sri Lanka

Name: Package Sewage Treatment Plant (STP) Sri Lanka
Brand: Water Lanka
Availability: InStock

Water Lanka Services (Pvt) Ltd engineers, fabricates, and installs high-efficiency Package Sewage Treatment Plants and centralized STPs for apartments, hotels, resorts, schools, restaurants, commercial buildings, and industrial manufacturing sites across Sri Lanka. Our biological treatment plants deliver 100% odorless operation, silent blowers, compact underground/above-ground footings, and crystal-clear treated effluent that meets or exceeds the discharge tolerance standards of the Central Environmental Authority (CEA) Sri Lanka.

Package Sewage Treatment Plant in Sri Lanka

Pre-Engineered Package Sewage Treatment Systems

Space constraints and rapid project schedules in Sri Lanka demand modular, plug-and-play sewage treatment solutions. Water Lanka’s package STPs are factory-fabricated in heavy-duty carbon steel with epoxy coating or modular FRP tanks, pre-piped and pre-wired with intelligent PLC control panels for swift on-site installation.

Our biological reactors utilize cutting-edge Sequencing Batch Reactor (SBR), Moving Bed Biofilm Reactor (MBBR), and Membrane Bioreactor (MBR) processes that degrade organic carbon (BOD/COD), nitrify ammonia, and digest bio-sludge with minimal energy consumption and zero offensive odors.

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Customized Sewage Treatment Solutions by Sector

Engineered to meet specific discharge and footprint challenges across Sri Lanka

Apartments & Condominiums

Compact underground or basement package STPs designed for high-rise residential towers in Colombo, Rajagiriya, Dehiwala, and Gampaha. Silent air blowers, zero odor, and automated treated water recycling for garden irrigation and dual-plumbing toilet flushing.

Apartment STP Specs

Hotels, Resorts & Restaurants

Aesthetic biological sewage plants for luxury beachfront resorts, eco-lodges, and city hotels in Galle, Bentota, Negombo, Kandy, and Colombo. Integrated grease traps, shock load balancing, and high-purity effluent for golf courses and landscaped gardens.

Hotel STP Solutions

Schools & Universities

Economical, robust sewage treatment plants for educational campuses, international schools, and boarding colleges. Handles fluctuating peak student loads with automated SBR biological aeration cycles and foolproof safety disinfection.

School STP Sizing

Industrial & Factory Campuses

Domestic sewage treatment systems for garment factories, export processing zones (Katunayake FTZ, Biyagama, Seethawaka), food processing plants, and industrial warehouses with workforce capacities from 100 to 10,000+ workers.

Industrial STP Quote

Standard Package STP Specifications & CEA Tolerance Compliance

All Water Lanka Sewage Treatment Plants are engineered to guarantee compliance with the Gazette of the Democratic Socialist Republic of Sri Lanka (Central Environmental Authority) National Environmental (Protection & Quality) Regulations:

Water Quality Parameter	Raw Sewage Influent	Water Lanka STP Treated Effluent	CEA Sri Lanka Tolerance Limit
BOD5 (Biochemical Oxygen Demand)	250 – 450 mg/L	< 10 – 20 mg/L	< 30 mg/L (General Inland)
COD (Chemical Oxygen Demand)	400 – 800 mg/L	< 50 – 100 mg/L	< 250 mg/L
TSS (Total Suspended Solids)	200 – 400 mg/L	< 10 – 20 mg/L	< 50 mg/L
pH Value	6.5 – 8.5	6.8 – 7.8	6.0 – 8.5
Oil and Grease	20 – 50 mg/L	< 5 mg/L	< 10 mg/L
E. Coli / Faecal Coliforms	10^6 – 10^8 MPN/100ml	Nil / Disinfected (UV/Chlorine)	< 40 MPN/100ml

Serving All Industrial Hubs & Municipalities in Sri Lanka

Water Lanka Services provides comprehensive site survey, civil design, mechanical fabrication, electrical automation, chemical supply, commissioning, operator training, and annual maintenance contracts (AMC) across:

Western Province (Colombo, Gampaha, Kalutara) Katunayake & Biyagama Free Trade Zones Central Province (Kandy, Matale, Nuwara Eliya) Southern Province (Galle, Matara, Hambantota) North Western Province (Kurunegala, Chilaw, Puttalam) Sabaragamuwa (Ratnapura, Avissawella)

Frequently Asked Questions: Sewage Treatment Plants Sri Lanka

What is a Package Sewage Treatment Plant and why is it preferred in Sri Lanka? +

A Package Sewage Treatment Plant is a compact, pre-fabricated biological treatment system housed in durable steel or FRP tanks. It requires 60% less footprint than conventional open concrete sewage lagoons, eliminates unpleasant odors, and operates with low maintenance. In Sri Lanka, where land costs and municipal building regulations in urban areas like Colombo and Gampaha are strict, package STPs provide fast installation and guaranteed CEA compliance.

Can treated sewage water be reused for other purposes? +

Yes! With Water Lanka's tertiary multimedia sand filtration, activated carbon polishing, and UV or chlorine disinfection, the treated water is clear, odorless, and pathogen-free. It can be safely reused for garden lawn watering, landscaping, car washing, cooling tower make-up, and toilet flushing in commercial complexes.

Does Water Lanka assist with Central Environmental Authority (CEA) approvals? +

Yes, our certified water and wastewater engineers provide complete technical drawings, process design notes, and water quality testing documentation required for obtaining CEA Environmental Protection Licenses (EPL) and local municipal approvals across Sri Lanka.