WWT Decision Support System
India’s First Self-Service Wastewater Treatment Technology Selection Platform
Screen 65 treatment technologies. Generate NTS feasibility assessments. Compare 3 design options with CAPEX, OPEX, lifecycle NPV, and compliance verification — all validated against CPHEEO Manual 2013 and Metcalf & Eddy 5th Edition.
What Makes This Different
Every parameter, every formula, every cost estimate is traceable to a published Indian or international engineering standard.
Aligned to CPHEEO & CPCB
All 65 technology parameters — removal efficiencies, land requirements, energy consumption, HRT, CAPEX/OPEX — validated against CPHEEO Manual on Sewerage & Sewage Treatment (2013), CPCB performance evaluations, and NMCG benchmark STP data. Sizing equations reference specific Manual chapters and tables.
NTS-First Philosophy
Natural Treatment Systems are the default for sewage — as recommended by CPHEEO Part B Chapter 5. Our 5-check NTS Feasibility Gate (Land, Climate, Flow, Standard, Site) determines if constructed wetlands, WSP, French Reed Beds, or the NMCG-standard UASB+DHS train can serve as primary treatment — delivering 80-95% lower energy and 30-60% lower lifecycle cost.
Multi-Criteria Comparison
9-criterion weighted scoring matrix: CAPEX (20%), OPEX (20%), Lifecycle NPV (15%), Energy (10%), Land (10%), Compliance (10%), Carbon (5%), Simplicity (5%), Flexibility (5%). Each option sized, costed, and compliance-checked against your applicable discharge standard — CPCB, NGT 2019 (Metro or Other), or state-specific norms.
65 Technologies Across 6 Categories
15 Natural Treatment Systems
FWS CW, VFCW, HSSF CW, Hybrid CW (VF+HF), French Reed Bed, Duckweed Pond, Waste Stabilisation Pond (AP+FP+MP), Facultative Pond, Anaerobic Pond, Maturation Pond, Aerated Lagoon, Root Zone Treatment, SAT, HRAP, Floating Treatment Wetland
16 Mechanical Technologies
ASP, SBR, MBR, MBBR, UASB, SAFF, DAF, Trickling Filter, Extended Aeration, RBC, CASS, Package STP, IFAS, ABR, DEWATS, DHS (Downflow Hanging Sponge) — the NMCG-standard post-UASB polishing technology developed by IIT Bombay
34 Advanced & Support Technologies
Physico-Chemical: Coag-Floc, EC, Neutralisation, API/CPI, Chrome Recovery, Cyanide Destruction, Phenol Recovery
Tertiary: DMF, PSF, ACF, UF, RO, NF, UV, Ozone, Chlorination, AOP (Fenton, UV/H2O2), Electro-oxidation
ZLD: MEE, MVR, ATFD, Crystallizer, Solar Evaporation
Sludge: Gravity Thickener, Anaerobic/Aerobic Digester, Belt Press, Centrifuge, Filter Press, Solar Drying, Reed Bed, Composting, Vermicomposting
Engineering Rigour
13 Detailed Unit Sizers
Not just lookup tables — full engineering sizing with dimensional output:
- NTS: FWS CW, VFCW, HSSF CW, Hybrid CW (VF+HF), French Reed Bed, WSP (3-pond series with Marais equation)
- Mechanical: ASP (with primary + secondary clarifier), SBR (F/M, SRT, oxygen demand), MBBR (SALR, media area), MBR (flux, membrane area, TMP), UASB (OLR, biogas, height cap), Extended Aeration, DHS (post-UASB)
Every sizer includes: oxygen demand (carbonaceous + nitrogenous), sludge production (observed yield method), blower sizing, and clarifier design per M&E Chapter 8.
Regulatory Intelligence
Complete Indian regulatory database covering every scenario:
- CPCB: Inland (EP Rules Sch. VI), Metro 2017, Sewer Discharge
- NGT 2019: Split Metro (BOD 10, COD 50, FC 100) and Other Towns (BOD 20, COD 100, FC 230)
- 22 States: Maharashtra, Delhi, Karnataka, Tamil Nadu, Gujarat, UP, Bihar, Uttarakhand, and 14 more with state-specific SPCB norms
- Reuse: Irrigation (CPHEEO Ch 7), Industrial Cooling, Potable (BIS 10500)
- ZLD: Textile, Tannery, Distillery, Pharma, Thermal Power mandates
- CETP: Separate CETP discharge standards
- 25 Industry Presets: Textile, Dairy, Food Processing, Pharma, Petrochemical, Hospital, and 19 more with pre-loaded influent quality
Cost Engineering
CAPEX Breakdown
- Civil & Mechanical: 40%
- Equipment: 35%
- Electrical & Instrumentation: 12%
- Design Engineering: 4% (CPHEEO 3-5%)
- Commissioning: 3%
- Contingency: 8%
- Land cost at location-appropriate rates
OPEX Components
- Energy: technology-specific kWh/m3 at Rs 8/kWh
- Chemicals: 15% of base OPEX
- Manpower: CPHEEO Table 10.1 staffing norms
- Maintenance: 2% of CAPEX/year
- Sludge: NTS 0.10 vs Mechanical 0.40 kg/m3
Lifecycle Analysis
- 20-year design horizon
- NPV at 8% discount rate
- Cost per KL over lifecycle
- Carbon footprint: Scope 1 (process) + Scope 2 (energy)
- Grid emission factor: 0.716 kgCO2/kWh (CEA CO2 Baseline Database v19, 2024). Note: actual factor varies by state grid — check your state DISCOM for location-specific values
Report Tiers
Explorer
- 1 recommended technology
- NTS feasibility score
- 2-page summary PDF
- 5 assessments/month
Advisor
- 3 treatment options with full comparison
- Unit sizing per CPHEEO norms
- CAPEX/OPEX engineering estimates
- Compliance verification
- Carbon footprint assessment
- 13-page consulting-grade PDF
- 36-page feasibility report (DPR-grade)
Enterprise
- Everything in Advisor
- 15 assessments per year
- For consulting firms, ULBs, and industrial groups
- White-labelled reports available
- Priority support
Who This Is For
Municipal Authorities & ULBs
AMRUT 2.0, NMCG, SBM 2.0 project planning. Technology selection before DPR commissioning.
Industries & CETPs
ETP design for 25 sectors. ZLD compliance. Pre-treatment selection. SPCB consent applications.
Consulting Engineers
Rapid technology screening. Client proposals. Preliminary sizing before detailed design. DPR annexures.
Students & Researchers
Free tier for academic projects. Compare NTS vs mechanical. Understand Indian regulatory landscape.
Standards & References
Indian Standards
- CPHEEO Manual on Sewerage & Sewage Treatment, 2013 (Part A & B)
- CPHEEO Manual on Septage Management, 2020
- CPCB Directions — Metro STP 2017, CETP, ZLD
- NGT Order dated 30.04.2019 (STP Standards)
- MOEFCC Environment Protection Rules, 1986 (Schedule VI)
- IS 3370 (Water-retaining structures), IS 456 (RCC), IS 1893 (Seismic)
- CEA CO2 Baseline Database for Indian Power Sector, 2024
International References
- Metcalf & Eddy: Wastewater Engineering, 5th Edition (2014)
- IWA Nature-Based Solutions Guidelines
- UN-Habitat: Constructed Wetlands Manual (2008)
- IPCC Guidelines for National GHG Inventories, 2019
- Vymazal (2007): Removal of nutrients in CW
- Mara (2004): Domestic Wastewater Treatment in Developing Countries
Already know which technology? Use WWT Designer for detailed sizing and comparison of 6 specific technologies with CAPEX/OPEX.
The WWT DSS generates preliminary technology assessments. For AMRUT/NMCG-ready DPRs, detailed engineering design (DED), tender documentation, and construction supervision, engage our water engineering team.
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