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Longantai Wastewater Anaerobic,Anoxic,Oxic Process Treatment

Longantai Wastewater Anaerobic,Anoxic,Oxic Process Treatment

2024-11-11

1. Description...
The A/0 process improves upon the activated-sludge process by using an anaerobic selector to develop a biomass. This biomass first stores BOD anaerobically and then assimilates phosphorus in a subsequent oxic, or aerobic zone. Because its operation uses anaerobic uptake of BOD, the process particularly resists hydraulic and organic upsets. It also minimizes the presence of Nocardia and other sludge-bulking organisms commonly found in Activated Sludge plants. The A/0 process for secondary treatment has been proven reliable and cost-effective through extensive pilot testing and actual full-scale plant operation.
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2. Applications...
• Secondary or advanced treatment requirements with air- or oxygen-activated sludge.
• Process control problems resulting from sludge-bulking or wide swings in organic loading.
• Increasing rated design organic load but limited available space to expand.
• Discharge permit may require nutrient control in the future.
3. Features and Benefits...
3.1 Non-Bulking Sludge :
• Resistant to proliferation of bulking organisms. Superior Settling Characteristics :
• Settles rapidly and compacts well.
• Precise process control.
• Improved thickening and dewatering properties.
3.2 Improved Stability :
• Anaerobic selector permits operation over a wide range of hydraulic and organic loading conditions.
3.3 Ease of Operation :
• Equipment is common to most Treatment Plants.
• Physical layouts and flow schemes are similar to conventional activated- sludge plants.
3.4 Reduced Construction Cost :
• High-rate design results in less tankage.
• Better use of existing facilities.
3.5 Air or Oxygen Aeration :
• Compatible with either air or pure oxygen aeration systems (e.g., OASES ).