Some images are technical illustrations. Real installation photographs where marked.
Overview
The CG BioCore ABR™ (Anaerobic Baffled Reactor) is a passive, gravity-driven treatment technology for applications where simplicity, low cost, and freedom from electrical power are essential. The reactor consists of a series of vertical baffles inside a reinforced concrete chamber that force wastewater to flow alternately upward and downward through separate sludge beds — effectively creating multiple UASB reactors in series within a single structure. Each compartment develops a distinct microbial community specialised for a particular stage of anaerobic decomposition. With no electrical requirements, no moving parts, minimal maintenance, and RCC construction using locally available materials, the ABR delivers BOD/COD reduction and pathogen removal at the lowest lifecycle cost of any biological treatment system.
Working Principle
Wastewater enters the first compartment and flows downward, then upward through the settled sludge bed, over the baffle, and down into the next compartment — repeating across 4–8 compartments. Each upflow-through-sludge passage allows anaerobic microorganisms to digest organic matter. Progressive microbial ecology across compartments provides stable, efficient treatment. Biogas escapes through vent pipes at the top of each compartment. Digested sludge accumulates slowly in the compartment floors and requires removal (desludging) only every 2–5 years using a vacuum tanker.
Key Technical Features
- Zero electricity — fully gravity-driven
- No moving parts — minimal maintenance
- BOD removal: 70–85%
- 4–8 baffled compartments in series
- RCC construction — 25+ year design life
- Tolerates shock loads and flow variations
- Desludging required only every 2–5 years
- Functions as primary and secondary treatment in one unit
- Suitable pre-treatment before constructed wetlands
- Very low sludge production
Design Parameters
| Parameter | Value |
|---|---|
| Flow Range | 20–2,000 m³/day |
| Inlet BOD | 150–800 mg/L |
| BOD Removal | 70–85% |
| Compartments | 4–8 |
| HRT | 8–24 hours |
| Construction | RCC |
| Energy | Zero |
| Desludging | Every 2–5 years |
| Design Life | >25 years |
Applications
- Rural and peri-urban municipal sewage
- Housing society sewage pre-treatment
- Schools and institutional facilities
- Small food processing without reliable power
- Off-grid and remote site treatment
- Pre-treatment before constructed wetlands (ABR+HSSF)
- Low-cost community sanitation
Advantages
- No electricity — works during Pakistan power outages
- No moving parts — no mechanical breakdowns
- Extremely low O&M cost
- All construction materials locally available
- Long life — no membrane or media to replace
- Combine with constructed wetlands for complete treatment at minimal cost
- Odour-free operation if properly covered
- Gravity operation — no pumping required in most configurations
Frequently Asked Questions
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