Graf one2clean sewage treatment plant
Overview: Graf one2clean Sewage Treatment Plant
What It Is
The Graf one2clean is a compact, single-tank, single-chamber sewage treatment system (SBR technology), designed to provide effective and eco-efficient wastewater treatment for properties not connected to mains drainage
Key Advantages & Features
Simple, Efficient Design
Only one tank and chamber required—no internal mechanical elements, pumps, or wiring in the wastewater zone
Uses Sequencing Batch Reactor (SBR) technology with three-step treatment: aeration, settling, and air-lift clear water removal
Superior Effluent Quality
Typical treated water results: BOD ~7 mg/L, Suspended Solids ~14 mg/L, Ammonium ~0.5 mg/L
Consistently outperforms some alternatives e.g. Klargester Biodisc with higher BOD and ammonium levels
Low Maintenance & Operating Costs
Minimal sludge production.
Low energy usage: approximately 46 kWh per person/year or 75 kWh per person/year depending on model/source
Quiet, reliable operation.
Installation & Adaptability
Strong injection-moulded plastic tank, suitable for granular base/backfill no concrete needed and groundwater stable to the mid-line
Lightweight and compact installable in restrictive sites with reduced installation costs
Optional features include raised outlets, vehicle-rated lids, and external control cabinets to suit site-specific needs
Warranty & Certification
CE certified in accordance with EN 12566‑3
Warranty coverage: 10–15 years on the tank, 1–3 years on compressor/technology depending on seller and commissioning arrangements
What Happens Inside
The system operates using an SBR (Sequencing Batch Reactor) process:
Aeration – Compressed air activates aerobic microorganisms to break down waste.
Settling – Aeration stops so solids settle, separating clear water.
Clear Water Removal – Treated water is lifted out via an air-lift pump mechanism, avoiding sludge disturbance
Typically, two treatment cycles occur daily, adjustable according to site requirements
Summary Table
| Feature | Benefit |
|---|---|
| Single-tank SBR design | Streamlined, low maintenance, minimal internal components |
| High effluent quality | Clean discharge meeting stringent environmental standards |
| Low energy use | Efficient~46–75 kWh per person/year |
| Easy installation | Lightweight, minimal groundwork, adaptable to site levels |
| Warranty & certification | 10–15 years on tank; CE-certified; 1–3 years on electronics/compressor |
| Customisation options | Raised outlets, vehicle lids, external cabinets, ideal for diverse site needs |
Use Cases & Applications
Perfect for:
Remote or self-built homes not connected to mains.
Areas with tight environmental regulations or nutrient neutrality requirements.
Property owners who prioritise minimal maintenance, quiet performance, and future-proof compliance.