Our Technology Portfolio
Treatment Technologies
We deploy 10+ proven treatment technologies — selecting based on your wastewater characteristics, site constraints, budget, and compliance requirements. Never one-size-fits-all.
Technology selection at Critical GREEN begins with characterisation of your wastewater — not a catalogue. Here is how we match technology to application.
Anaerobic pre-treatment (UASB or IC Reactor) followed by aerobic polishing (SBR or MBR). Biogas recovery makes the system energy-positive.
DAF or SAF pre-treatment for fats, oils, and grease removal, followed by biological treatment. CAV-DAF for emulsified streams and colour.
ABR + constructed wetlands for low-cost gravity treatment, or SBR/MBR for NEQS-compliant effluent with reuse potential. Underground option for housing societies.
| Technology | Inlet COD Range | Removal Efficiency | Energy Use | Best For |
|---|---|---|---|---|
| UASB Reactor | 1,000–30,000 mg/L | 60–85% COD | Very Low + Biogas | Sugar, Distillery, Food |
| IC Reactor | 5,000–80,000 mg/L | 70–90% COD | Very Low + Biogas | Distillery, Paper, Pharma |
| ABR | 150–800 mg/L | 70–85% BOD | Zero | Municipal, Housing, Rural |
| SBR | 100–2,000 mg/L | >90% BOD | Medium | Textile, Edible Oil, Municipal |
| MBR | 100–1,500 mg/L | >98% BOD | Medium-High | Housing, Hotels, Reuse |
| BAF | 50–500 mg/L | 85–95% BOD | Medium | Municipal, Industrial Polish |
| SAF / DAF | FOG <2,000 mg/L | >92% FOG | Low-Medium | Edible Oil, Dairy, Food |
| Constructed Wetlands | 50–400 mg/L (post ABR) | 70–95% BOD | Zero to Minimal | Municipal, Sugar Polish, Reuse |
UASB achieves 70–85% COD reduction with biogas recovery. SBR polishes to NEQS. Total COD removal >95%.
CAV-DAF removes 60–80% colour and SS. SBR biological stage removes BOD/COD to NEQS. Multimedia filter polishes SS.
SAF removes >95% FOG in pre-treatment. SBR handles residual BOD/COD. NEQS compliance achieved consistently.
MBR produces BOD <5 mg/L, SS ~0 mg/L. UV disinfection for reuse. Installed underground — green area above.
ABR + HSSF wetland = zero electricity, no moving parts, 25-year design life. Lowest cost treatment for Pakistan conditions.
Ammonia stripping tower removes NH₃-N to <50 mg/L before biological stages. (NH₄)₂SO₄ fertiliser by-product recovered.
Share your wastewater parameters and our engineers or AI assistant will recommend the right treatment train.