Description
Understanding Sewage Treatment Plant (STP Plant)
A Sewage Treatment Plant (STP) is an essential system designed to treat and purify wastewater generated from domestic and commercial sources. In apartments, societies, and residential complexes, an STP ensures that all used water from toilets, bathrooms, kitchens, and laundries is properly treated before being released into the environment or reused for non-potable purposes like gardening and flushing.
With increasing urbanization and population density, especially in cities like Delhi, Noida, Ghaziabad, Gurgaon, and Faridabad, proper sewage treatment is not just a need—it’s a legal and environmental responsibility. A well-designed STP helps maintain hygiene, prevent waterborne diseases, and protect natural water bodies from contamination.
What Is a Sewage Treatment Plant (STP Plant)?
A Sewage Treatment Plant (STP) is a combination of physical, chemical, and biological processes that remove contaminants, organic matter, and harmful bacteria from wastewater. It converts sewage into treated effluent (clean water) and safe sludge that can be reused or disposed of responsibly.
An STP typically includes the following stages:
- Primary Treatment: Removal of solid waste, grease, and large particles.
- Secondary Treatment: Biological breakdown of organic matter using microorganisms.
- Tertiary Treatment: Filtration and disinfection for final water polishing.
After these steps, the treated water is clear, odorless, and suitable for reuse in various non-drinking applications, helping societies save water and contribute to sustainability.
STP Plant Diagram (Explained)
While a diagram visually represents the process, here’s a text-based description of a standard STP plant layout for apartments:
- Inlet Chamber: Raw sewage enters from the apartment’s drainage system.
- Screen Chamber: Removes larger debris such as plastics, rags, or stones.
- Collection & Equalization Tank: Balances the flow and ensures uniform treatment.
- Aeration Tank: Air is pumped to encourage bacterial growth that decomposes organic matter.
- Clarifier or Settling Tank: Solid particles settle at the bottom as sludge; the clear water flows forward.
- Filtration Unit (Sand + Carbon Filter): Polishes the water to remove residual impurities.
- Disinfection Chamber (Chlorination/UV): Kills any remaining pathogens.
- Treated Water Tank: Stores purified water for reuse.
- Sludge Drying Bed: Dries and dewaters the sludge for safe disposal.
This flow ensures that sewage from apartments is efficiently treated to meet pollution control board standards before discharge or reuse.
Sewage Treatment Plant Legal Requirements in India
Setting up an STP in an apartment or housing society is not optional—it’s a mandatory legal requirement under environmental laws in India.
Key Regulations:
- Central Pollution Control Board (CPCB) and State Pollution Control Boards (SPCBs) mandate STP installation in residential complexes with more than 20 housing units or water consumption above 20,000 liters per day.
- Builders and apartment associations must obtain Consent to Establish (CTE) and Consent to Operate (CTO) from SPCB.
- Treated water quality must meet the standards for parameters like BOD (<10 mg/l), COD (<50 mg/l), TSS (<10 mg/l), and pH (6.5–8.5).
- Discharge of untreated sewage is strictly prohibited under the Water (Prevention and Control of Pollution) Act, 1974.
Documentation Required:
- Site layout and design plan
- Process flow diagram
- Details of treatment capacity
- Effluent test reports
- Operation & maintenance plan
Failure to comply with these legal requirements can result in penalties, shutdown orders, or withdrawal of occupancy certificates. Hence, partnering with a professional STP manufacturer like V AQUA ensures compliance, efficiency, and long-term peace of mind.
Sewage Treatment Plant Guidelines for Apartments
When planning to install an STP, apartment owners and builders should follow CPCB and MoEF guidelines for design, operation, and maintenance.
Design & Installation Guidelines:
- Ensure capacity matches actual water usage and population load.
- Provide for easy access and maintenance areas.
- Use energy-efficient aeration systems to minimize operating costs.
- Include automatic control panels for monitoring and data logging.
- Opt for odour control systems to avoid complaints.
Operation & Maintenance Guidelines:
- Regular sludge removal and cleaning.
- Routine testing of treated water quality.
- Annual maintenance contract (AMC) with a reliable service provider.
- Trained operators must oversee plant operations.
- Keep logbooks for flow rate, pH, DO, and power usage.
V AQUA provides AMC, on-site service, and operator training, ensuring your STP remains compliant and efficient throughout its lifespan.
What Is the Cost of an STP Water Plant?
The cost of an STP plant depends on several factors such as capacity, treatment technology, and site conditions.
| Capacity (KLD) | Suitable For | Approx. Cost Range (INR) |
|---|---|---|
| 10–25 KLD | Small apartments or villas | ₹3 – ₹6 lakhs |
| 25–50 KLD | Medium housing societies | ₹6 – ₹10 lakhs |
| 50–100 KLD | Large apartments | ₹10 – ₹20 lakhs |
| 100–500 KLD | Townships, hospitals, industries | ₹20 – ₹50 lakhs+ |
Factors Affecting Cost:
- Technology type: MBBR, SBR, MBR, or FAB process
- Automation level: Manual, semi-automatic, or fully automatic
- Material used: RCC tanks or FRP units
- On-site civil work: Space, depth, and pipeline layout
- Brand and after-sales support
V AQUA offers customizable and affordable STP systems designed to fit your site and budget. With our in-house manufacturing in Noida and New Delhi, we provide top-quality equipment at competitive prices.
STP Plant Process: Step-by-Step Overview
1. Collection and Screening
Wastewater from all apartments is collected through pipelines and passed through bar screens to remove plastics and debris.
2. Primary Sedimentation
The water is allowed to rest in tanks where heavy solids settle at the bottom, forming sludge.
3. Aeration (Biological Treatment)
The clarified water is pumped into an aeration tank where air blowers and diffusers introduce oxygen, promoting microbial activity that breaks down organic waste.
4. Secondary Clarification
The mixed liquor from the aeration tank flows into a clarifier. Solids settle down, and clear water is collected at the top.
5. Filtration & Disinfection
Sand and carbon filters remove suspended solids and odors. The final stage uses chlorination or UV disinfection to ensure bacterial removal.
6. Sludge Handling
Collected sludge is treated in sludge drying beds or filter presses to reduce volume before safe disposal.
7. Reuse of Treated Water
Treated effluent is stored and reused for flushing, gardening, or HVAC cooling, reducing fresh water consumption by 30–40%.
This efficient cycle ensures zero wastewater discharge and promotes eco-friendly apartment living.
Why and How to Buy STP Plant from V AQUA WATER TREATMENT COMPANY
Why Choose V AQUA?
V AQUA WATER TREATMENT COMPANY is a trusted and reputed name in the water and wastewater treatment industry with over 20 years of experience and a 99.3% customer satisfaction rate. We specialize in Household, Domestic, Industrial, and Commercial water treatment systems across Delhi/NCR.
We offer end-to-end STP solutions — from design, manufacturing, installation, and commissioning to AMC, operation, and service.
Key Advantages:
- ✔️ In-house manufacturing units in Noida & New Delhi
- ✔️ Advanced technologies (MBBR, SBR, MBR, FAB)
- ✔️ Customizable capacity from 1 KLD to 500+ KLD
- ✔️ 24/7 customer support and technical assistance
- ✔️ On-site testing and maintenance services
- ✔️ Energy-efficient, low-noise, and compact designs
- ✔️ Eco-friendly and CPCB-compliant systems
Areas We Serve in Delhi/NCR and Pan India:
- Delhi (South Delhi, East Delhi, West Delhi, North Delhi, Central Delhi)
- Noida
- Greater Noida
- Ghaziabad
- Gurgaon (Gurugram)
- Faridabad
- Sonipat
- Manesar
- Bahadurgarh
Wherever your project is located in NCR, V AQUA provides quick response, professional service, and reliable performance.
How to Buy from V AQUA
Buying an STP from V AQUA is simple and transparent:
- Book a Free Site Visit: Our team inspects your apartment site to assess space, load, and treatment needs.
- Get a Customized Quote: Based on your requirement and budget, we design a tailor-made STP solution.
- Manufacturing & Installation: Your STP is built in our Noida or New Delhi unit and installed on-site.
- Testing & Commissioning: We run trials and provide performance certificates.
- After-Sales Support: Our AMC team ensures hassle-free operation and compliance with pollution norms.
Contact us today to get your eco-friendly STP system delivered and installed at your property.
V AQUA WATER TREATMENT COMPANY: Overview
V AQUA WATER TREATMENT COMPANY is one of the leading manufacturers, suppliers, and service providers of water and wastewater treatment systems in India. We cater to a wide range of clients — apartments, homes, hotels, hospitals, industries, and institutions.
Our Product Range Includes:
- RO Water Purifiers
- Commercial & Industrial RO Plants
- Water Softeners
- ETP Plants (Effluent Treatment Plants)
- STP Plants (Sewage Treatment Plants)
- UF Systems
- WTP Plants (Water Treatment Plants)
- Wastewater Treatment Plants (WWTP)
Each solution is customizable on demand and designed to meet international quality standards at reliable prices.
Why Apartments Need STP Plants More Than Ever
With growing population density in Delhi NCR, apartments generate thousands of liters of sewage daily. Without proper treatment, this waste pollutes underground water, drains, and rivers. An STP plant ensures:
- Compliance with environmental laws
- Reduced dependency on municipal water
- Water reuse and recycling
- Better hygiene and odor control
- Green building certification (IGBC/Griha)
By investing in an STP, societies not only protect nature but also save on long-term water bills and maintenance costs.
Contact V AQUA WATER TREATMENT COMPANY
For high-quality Sewage Treatment Plants for Apartments, trust the experts at V AQUA WATER TREATMENT COMPANY.
📍 Head Office: Noida & New Delhi, India
📞 Mobile: 7827654995/9560654995
📧 Email: sales@vaqua.in
🌐 Website: www.roservicepoint.com
💧 Book a Free Demo or Site Visit Today!
Our experts are available 24/7 to assist you in selecting the right STP plant for your apartment or society.
Conclusion
A Sewage Treatment Plant for apartments is not just a regulatory requirement—it’s a responsible step towards sustainability and better living. Whether you’re a builder, RWA, or facility manager, choosing a reliable manufacturer like V AQUA WATER TREATMENT COMPANY ensures performance, compliance, and long-term savings.
From compact residential STPs to large commercial wastewater systems, V AQUA delivers end-to-end water treatment solutions across Delhi NCR with unmatched quality and service excellence.
Choose V AQUA. Choose purity, sustainability, and a greener tomorrow.
