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Sewage Treatment Plant
Overview
Sewage Treatment Plants (STPs) are essential infrastructure for any residential, commercial or institutional development. Green Nature Solutions designs, fabricates, erects, operates and maintains sewage treatment plants that treat domestic wastewater to standards suitable for safe disposal or reuse — for gardening, toilet flushing and groundwater recharge.
How It Works
Raw sewage undergoes a series of physical, biological and chemical treatment stages to progressively remove solids, organic matter, nutrients and pathogens — producing treated effluent that meets pollution control board (PCB) discharge norms.
Treatment Stages
Preliminary Treatment
- Bar screens and fine screens to remove large solids, rags and debris
- Grit chamber to remove sand and heavy inorganic particles
- Equalization tank to buffer flow and load variations
Primary Treatment
- Primary settling tank (PST) for gravity settling of suspended solids
- Sludge collection and transfer to sludge treatment
Secondary (Biological) Treatment
- Activated sludge process, SBR, MBBR, FBBR or MBR depending on design
- Biological removal of BOD, COD and suspended solids by microbial action
- Secondary clarifier for separation of treated water and biomass
Tertiary Treatment
- Sand filtration and activated carbon filtration for polishing
- UV disinfection or chlorination to eliminate pathogens
- Nutrient removal (nitrogen and phosphorus) if required
Sludge Treatment
- Sludge thickening, digestion and dewatering
- Filter press or centrifuge for sludge cake production
- Dried sludge used as manure or landfill
STP Technologies We Offer
| Technology | Best For |
|---|---|
| Conventional ASP | Large municipal and industrial STPs |
| SBR (Sequencing Batch Reactor) | Medium to large residential complexes |
| MBBR (Moving Bed Biofilm Reactor) | Compact, high-load applications |
| MBR (Membrane Bioreactor) | High-quality reuse water requirements |
| FBBR (Fixed Bed Biofilm Reactor) | Small to medium capacity |
| Underground STP | Where surface footprint is a constraint |
Applications
- Residential apartments and housing societies
- Hotels, resorts and commercial complexes
- Hospitals and educational institutions
- Industrial townships and SEZs
- Municipal corporations
- IT parks and campuses
Key Features
- Treated water meets PCB / CPCB discharge norms
- Treated water reusable for gardening, flushing and horticulture
- Low sludge generation with compact design
- Odour control provisions
- PLC-based automation with SCADA for remote monitoring
- Complete O&M support and AMC services available
Technical Specifications
| Parameter | Details |
|---|---|
| Capacity Range | 10 KLD – 10 MLD |
| BOD Removal | > 95% |
| COD Removal | > 90% |
| TSS in Treated Water | < 10 mg/L |
| Treated Water BOD | < 10 mg/L |
| Coliform in Treated Water | < 100 MPN/100 mL |