ETP — Industrial Effluent
Treats process wastewater from factories and industries. Common concerns include COD, BOD, chemicals, oils, colour, suspended solids, metals or other process contaminants.
Selection Guide
ETP vs STP vs WTP: Difference, Process & Applications
A practical guide to choosing the right plant for industrial effluent, domestic sewage or raw-water treatment.
Treatment Basics
Difference Between ETP, STP and WTP
ETP, STP and WTP are not interchangeable systems. They are designed for different water streams and different treatment objectives. Choosing the correct category is the first step before capacity, technology or equipment selection.
ETP stands for Effluent Treatment Plant and is mainly used for industrial process wastewater. STP stands for Sewage Treatment Plant and treats domestic sewage. WTP stands for Water Treatment Plant and treats raw or incoming water before it is used.
The actual process inside each plant depends on water quality, contaminants, required outlet quality, flow variation, site conditions and reuse or discharge objectives.
Quick Comparison
ETP vs STP vs WTP at a Glance
STP — Domestic Sewage
Treats wastewater from toilets, kitchens, washrooms and other domestic sources in societies, hotels, hospitals, campuses and commercial properties.
WTP — Raw Water
Treats borewell, surface, municipal or other incoming water to achieve the quality required for process, utility, commercial or institutional use.
Typical Treatment Logic
How the Processes Differ
ETP Process
May use equalization, pH correction, coagulation, flocculation, clarification, biological treatment, advanced oxidation, filtration or membrane polishing depending on the effluent.
STP Process
Usually combines preliminary treatment, biological treatment, solid-liquid separation, filtration and disinfection; MBBR, MBR and SBR are common technology options.
WTP Process
May use clarification, media filtration, activated carbon, softening, disinfection, UF, RO or other conditioning depending on source-water quality and required output.
Commercial Pages
Find the Right Manufacturer & Supplier
↗
ETP Manufacturer & Supplier in India
For industrial effluent-treatment projects and process wastewater.
↗STP Manufacturer & Supplier in India
For domestic sewage from residential, hospitality, institutional and commercial facilities.
↗WTP Manufacturer & Supplier in India
For raw-water purification, conditioning and reuse requirements.
Selection Checklist
Information to Share Before Requesting a Proposal
For ETP, provide the industry type, wastewater analysis, average and peak flow, operating hours, existing treatment if any, discharge or reuse target and available footprint.
For STP, provide the number of users or daily sewage flow, project type, operating pattern, available space and intended treated-water reuse.
For WTP, provide source-water analysis, required treated-water quality, daily demand, end use and any specific filtration, softening, RO or disinfection requirement.
Frequently Asked Questions
FAQs
What is the main difference between ETP, STP and WTP?+
ETP treats industrial effluent, STP treats domestic sewage, and WTP treats raw or incoming water to make it suitable for a required use.
Can an STP treat industrial wastewater?+
An STP is primarily intended for domestic sewage or wastewater with similar biodegradable characteristics. Industrial effluent may require a dedicated ETP or pretreatment depending on its composition.
Is WTP the same as wastewater treatment?+
No. WTP generally refers to treating raw or incoming water for use, while wastewater treatment focuses on used water or effluent before reuse or discharge.
How do I choose between ETP, STP and WTP?+
Start with the source and composition of the water: industrial process effluent generally requires ETP, domestic sewage requires STP, and raw water requiring purification or conditioning requires WTP.
Pan-India Project Support
Discuss Your Requirement →Need help selecting the correct treatment plant?
Send the source-water or wastewater details and intended use. We can help determine whether the project requires an ETP, STP, WTP or a combination of treatment systems.