CHEN Hao-lin,PENY Yi,AN Dong,et al.Operation Optimization of Multi-stage A/O Process Based on BioWin Software[J].China Water & Wastewater,2020,36(19 19):60-66.
Operation Optimization of Multi-stage A/O Process Based on BioWin Software
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
19 19
Page:
60-66
Column:
Date of publication:
2020-10-01
- Abstract:
- During operation of a multi-stage A/O process, effective utilization of carbon sources in raw water and control of sludge concentration of each unit are of great importance to save energy of the system and comply with discharge standard. Among them, adjustment of influent distribution ratio and external reflux ratio are the most direct operational measures of field process optimization. Based on actual operational data of the wastewater treatment plant（WWTP）, BioWin software was applied to simulate the secondary reaction stage of Beijing Bishui WWTP. The biochemical reaction with real influent quality was simulated through model construction, checking (parameter correction) and verification. When the influent distribution ratio was 50% ∶30% ∶20% and the external reflux ratio (R) was 100%, the operational condition was the best. Engineering verification showed that the multistage A/O process was stable and the effluent quality was the best. Average removal efficiencies of COD, TN and NH3-N were 95%, 73% and 99%, respectively, which were 9%, 10% and 3% higher than those before adjustment. However, restricted by defect of the multi-stage A/O process itself, it was difficult to provide an anaerobic environment for phosphorus removal bacteria due to alternate aerobic-anaerobic operation of the process, resulting in low phosphorus removal efficiency.
Last Update:
2020-10-01