Now trusted across Indian cities including Chennai, Bengaluru, Hyderabad, Coimbatore, Kochi, and Mumbai, the Ergon Bio Tank transforms raw sewage into clear, odorless, reusable or recharge-ready water, helping projects achieve Zero Energy, Zero Discharge, and Net-Zero Wastewater Treatment outcomes.
Nature of System: 100% Biological | Non-toxic | Zero Energy | Zero Chemical Free
Clause C-1: Definition of LPCD
Liters Per Capita Per Day (LPCD) is the average quantity of water supplied
or wastewater generated per person per day and forms the primary basis
for sewage and greywater system design.
Clause C-2: CPHEEO Recommended Domestic LPCD
As per the standard domestic water demand for urban areas with full water supply
shall be taken as 135 LPCD. 50 sewage , 85 Greywater
Clause C-3: Post-COVID Design Adoption
Considering enhanced hygiene practices, frequent handwashing, and
increased cleaning, a higher LPCD may be adopted for realistic and safe
design. Accordingly, 200 LPCD is adopted as a
project-specific CPHEEO-compliant design value.
| Area Category | CPHEEO Standard (Per Capita) | Compliance Goal |
| Metropolitan / Mega Cities | 150 LPCD | Full Sewerage & Industrial projects |
| Urban Cities (with Sewerage) | 135 Post Covid 200 LPCD | Domestic + Commercial + Villas |
| Towns (without Sewerage) | 70 LPCD | Basic Domestic |
| Public Stand Posts (PSPs) | 40 LPCD | Minimum Hygiene Standard |
Clause S-1: Sewage Generation Factor
CPHEEO recommends that 80% to 90% of total water supply
shall be considered as sewage generation.
Clause S-2: Design Intent
The adopted sewage factor shall account for conveyance losses,
consumptive use, and evaporation, while ensuring that treatment units
are not hydraulically under-sized.
Clause G-1: Greywater Definition
Greywater includes wastewater generated from bath, wash basin,
laundry, and kitchen (after grease trap), excluding toilet waste.
Clause G-2: Greywater Proportion
As per CPHEEO planning practice, greywater typically constitutes 60% to 70% of total domestic water consumption.
Clause G-3: Post-COVID Greywater LPCD
In post-COVID conditions, greywater generation shall be adopted as 150 LPCD due to increased washing and cleaning practices,
unless supported by lower metered data approved by authorities.
LPCD values adopted for sewage and greywater design shall be clearly stated in DPRs, drawings, and tender documents and shall conform to CPHEEO philosophy, subject to approval by local bodies and Pollution Control Boards.
Separate treatment of sewage and greywater is encouraged to improve
reuse efficiency, reduce load on STPs, and promote sustainable water
management.
Raw domestic sewage is treated through where naturally occurring anaerobic bacteria decompose organic matter without oxygen, power, or chemicals. Raw sewage comprising blackwater and greywater first enters the Ergon Bio Collection Tank, sealed anaerobic Cylindrical Bio Collection Tank biological digestion, a sealed anaerobic chamber engineered with Ergon’s proprietary Bio-Nano coating. In the absence of oxygen, specialized anaerobic microorganisms—supported by the Ergon Bio Cleanser enzyme process—initiate natural biological digestion.
During this stage, complex organic matter such as fecal solids, fats, oils, grease, starches, and proteins undergo sequential biochemical transformations (hydrolysis → acidogenesis → acetogenesis → methanogenesis). This process significantly reduces organic load, odour, and suspended solids, converting raw sewage into partially treated, odourless, and stabilized effluent without electricity, chemicals, or mechanical equipment.
✔ Nature of Treatment ; 100% Biological | Non-toxic | Chemical-free | Odour-free | Zero-Energy & Zero-Chemical Operation
Anaerobic Digestion Products: CO₂ (Carbon dioxide) | CH₄ (Methane) | H₂O (Water) | Stabilized biomass
Note: Stage I effluent is not intended for direct discharge or reuse without Stage II treatment.
Application: Ergon Bio Tanks, Bio Septic Tanks, Bio STPs, Bio Greywater Systems
Stage 1 – Hydrolysis
CPHEEO 2013 Sec. 12.3 | IS 2470-1 Cl. 4.2
Polysaccharides → Sugars | Proteins → Amino acids | Fats → Fatty acids
Stage 2 – Acidogenesis
CPHEEO 2013 Sec. 7.4.2 | IS 2470-1 Cl. 5
Glucose → VFAs + CO₂ + H₂
Stage 3 – Acetogenesis
CPHEEO 2013 Sec. 7.4.3 | IS 2470-1 Cl. 5.3
VFAs → Acetate + CO₂ + H₂
Stage 4 – Methanogenesis
CPHEEO 2013 Sec. 7.4.4 | IS 2470-1 Cl. 6
CH₃COOH → CH₄ + CO₂
Results: Complete stabilization, minimal sludge, odour elimination
This is to certify that the Ergon Bio Tank® Stage I system operates as a Primary Anaerobic Biological Digestion unit, conforming to:
The system functions without electricity, chemicals, or mechanical components and serves as an approved replacement for conventional septic tanks.
Secondary Bio Evaporation Tank - Aerobic Biological Treatment with Evapotranspiration
In Stage II, the pre-treated effluent enters the Ergon Bio Evaporation Tank, where aerobic microorganisms further oxidize residual organic matter in the presence of atmospheric oxygen. This aerobic bio-polishing process reduces remaining BOD, COD, and pathogens, producing clear, non-toxic, and environmentally safe water.
This is to certify that the Ergon Bio Tank® Stage II system provides Secondary Aerobic Polishing followed by Evapotranspiration / Land Disposal, fully compliant with:
| Parameter | Specification |
|---|---|
| System Type | Primary Anaerobic Bio Collection Tank |
| Design Flow Rate | 50 LPCD per User |
| User Capacity (Indicative) | Good Soil: 06 – 08 Users Clay Soil: 04 – 06 Users |
| Tank Capacity | 1000 Liters |
| Tank Construction | RCC – M25 Grade |
| Tank Dimensions | 5 ft Height × 3.25 ft Diameter |
| Biological Additive | Ergon Bio Cleanser® |
| Dosing Quantity | 200 g × 1 No. |
| Dosing Frequency | Once every 6 months |
| Energy Requirement | Zero Energy • No Mechanical Equipment |
| Performance | Odourless Operation Minimal Sludge Generation Eco-Friendly & Low Maintenance |
| Design Life | Long Service Life with Biological Maintenance |
This is to certify that the Ergon Budget Bio Collection Tank – Stage I operates as a Primary Anaerobic Biological Digestion system, designed for decentralized treatment of domestic sewage / greywater.
The system conforms to the following statutory codes and standards:
The system functions without electricity, chemicals, or mechanical components and serves as an approved, eco-friendly alternative to conventional septic tanks, supporting sustainable sanitation and Net Zero Water objectives.