Ergon Bio Tank - Natural Eco Friendly Process
Ergon Bio Tank Natural Process - Bio STP
Anaerobic + Aerobic + Evapotranspiration Technology
The Ergon Bio Tank System is a 2-stage natural biological wastewater treatment process that combines Anaerobic Digestion, Aerobic Bio-Polishing Plus Evapotranspiration to convert in Stage II treatment and final environmental NET ZERO No Water -Eco friendly. The system operates without electricity, mechanical aeration, or chemicals, utilizing naturally occurring beneficial bacteria and bio-enzymes to stabilize wastewater. Designed for residential, commercial, institutional, hospitality, and industrial applications, sustainable water management with No maintenance, zero energy consumption, and long servicelife.
STAGE I- Ergon Bio Collection Tank
Process Flow - Raw Sewage → Ergon Bio Collection Tank(Anaerobic Bio-Coated Process) → Clear & Odour-Free Effluent → Stage IIAerobic Treatment / Evapotranspiration System
The Ergon Bio Collection Tank is an advancedanaerobicbiological wastewater treatment system designed with a special bio-coated internal surface that promotes the rapid growth of beneficial anaerobic bacterial enzymes. Domestic sewage is retained inside the tank for a controlled hydraulic retention time (HRT), allowing the bacteria to naturally digest organic matter through the stages of Hydrolysis, Acidogenesis, Acetogenesis, and Methanogenesis.
This biological process significantly reduces BOD, COD, Total Suspended Solids (TSS), sludge formation, and foul odour, while converting wastewater into a clear, odour-free effluent suitable for Stage II Aerobic Bio Treatment or Evapotranspiration (ET) Process. The system operates without electricity or mechanical aeration, making it a sustainable, low-maintenance solution for decentralized sewage treatment.
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ERGON BIO EVAPOTRANSPIRATION SYSTEM (ET)
Stage II – Aerobic Bio-Polishing & Natural Evapotranspiration (Zero Liquid Discharge)
1. What is Evapotranspiration?
Evapotranspiration (ET) is a natural wastewater polishing process in which treated water is biologically purified through aerobic microorganisms, plant root zones, soil media and atmospheric oxygen. The remaining water is gradually absorbed by plant roots and released to the atmosphere as water vapour through transpiration while surface evaporation removes additional moisture. The Ergon Bio Evapotranspiration Tank is designed to achieve Zero Liquid Discharge (ZLD) without electrical equipment, mechanical aerators or chemical treatment.
2. How the Ergon Evapotranspiration Process Works
Step 1 – Aerobic Bio-Polishing
Naturally occurring aerobic bacteria oxidize remaining dissolved organic matter, reducing BOD, COD and odour.
Step 2 – Carbon Oxidation
Organic compounds are converted into carbon dioxide, water and microbial biomass.
Step 3 – Nitrification
Ammonia (NH₃) is biologically converted into Nitrite (NO₂⁻) and subsequently into Nitrate (NO₃⁻).
Step 4 – Root Zone Filtration
Plant roots and bio-media absorb nutrients while increasing oxygen transfer into the biological treatment zone.
Step 5 – Evapotranspiration
Water is absorbed by plant roots and released into the atmosphere as water vapour through natural transpiration and evaporation, achieving Zero Liquid Discharge.
3. Biological & Chemical Reactions
Carbon Oxidation
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O
Nitrification
NH₃ → NO₂⁻ → NO₃⁻
Photosynthetic Oxygenation
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
Evapotranspiration
Purified water is naturally released as water vapour through plant transpiration and surface evaporation.
4. Key Benefits
- Zero Liquid Discharge (ZLD)
- No Electricity Required
- No Mechanical Equipment
- No Pumps
- No Aerators
- Low Maintenance
- Natural Wastewater Treatment
- Odour Free Operation
- Reduced Sludge Generation
- Eco-Friendly Technology
- Long Design Life
- Sustainable Water Management
5. Treatment Flow Sequence
Primary Anaerobic Treatment ↓ Aerobic Bio-Polishing ↓ Carbon Oxidation ↓ Nitrification ↓ Root Zone Treatment ↓ Plant Nutrient Uptake ↓ Evapotranspiration ↓ Zero Liquid Discharge
6. CPHEEO Guidelines (MoHUA)
Manual on Sewerage & Sewage Treatment (2013)
- Chapter 12 – On-site Sanitation Systems
- Section 12.4 – Secondary Biological Treatment
- Section 12.7 – Decentralized Wastewater Treatment Systems (DEWATS)
- Natural Land Disposal Concepts
- Waste Stabilization Principles
The Ergon Bio Evapotranspiration System follows the biological treatment concepts described for decentralized wastewater treatment.
7. BIS Standards
- IS 2470 (Part 1):1985 – Septic Tank Design
- IS 2470 (Part 2):1985 – Effluent Disposal
- IS 456:2000 – Plain & Reinforced Concrete
- IS 3370 Series – Concrete Structures for Storage of Liquids
- IS 1893 – Structural Design (where applicable)
8. National Building Code (NBC 2016)
- Part 9 – Plumbing Services
- On-site Wastewater Treatment
- Wastewater Disposal Systems
- Sanitation Engineering
9. CPCB Environmental Requirements
- Environment (Protection) Act, 1986
- Environment (Protection) Rules, 1986
- Schedule VI – Environmental Standards
- General Guidelines for Wastewater Management
10. IGBC Green Building
- Water Conservation
- Wastewater Reuse
- Sustainable Landscaping
- Resource Efficiency
- Reduced Environmental Impact
- Green Infrastructure
The Ergon Bio Evapotranspiration System can support project objectives related to sustainable wastewater management and water conservation.
11. Applications
- Individual Houses
- Residential Villas
- Apartments
- Hotels & Resorts
- Hospitals
- Schools & Colleges
- Commercial Buildings
- Industrial Campuses
- Institutional Projects
- Rural & Remote Developments
12. Technical Disclaimer
Ergon Bio Evapotranspiration System is engineered using recognized aerobic biological treatment, root-zone treatment and natural evapotranspiration principles. References to CPHEEO, BIS, NBC, CPCB and IGBC indicate alignment with established engineering guidance and applicable standards. These references should not be interpreted as certification or approval by those organizations unless separately obtained.
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