KUANGKe,CHANGYing,SUNWei,et al.Process Optimization and Operation Management of Wastewater Treatment Plant Based on Numerical Simulation[J].China Water & Wastewater,2023,39(19):69-74.
Process Optimization and Operation Management of Wastewater Treatment Plant Based on Numerical Simulation
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第19期
Page:
69-74
Column:
Date of publication:
2023-10-01
- Keywords:
- wastewater treatment plant; process simulation; energy conservation and emissions reduction; operation optimization; seasonality
- Abstract:
- The mathematical model of multi?stage AO process (multi?point influent) of a wastewater treatment plant in the dry season and rainy season was established via activated sludge process simulation software. After calibration and verification, the operational parameters such as MLSS, proportion of the influent and DO of the aerobic tank were optimized, and the optimal operation strategy was formed in the dry season and rainy season, which further improved the effluent quality, reduced the operating costs of aeration consumption and chemical dosage, and achieved the goal of energy saving and consumption reduction. The MLSS of the biochemical tank should be controlled in the range of 3.5-4 g/L and 3-3.5 g/L in dry season and rainy season, respectively. The proportion of the influent introducing into the anoxic zone Ⅰ should be increased appropriately. In addition, the DO of the two aerobic tanks should be reduced as much as possible while ensured that there was no accumulation of nitrite, and priority should be given to adjusting the DO of the aerobic zone Ⅰ. After optimization in dry season, the effluent ammonia nitrogen and TN decreased from 0.10 mg/L and 8.03 mg/L to 0.06 mg/L and 7.24 mg/L, respectively, and the aeration intensity and aluminum sulfate dosage decreased by 14.3% and 6.25%, respectively. In rainy season, the effluent ammonia nitrogen and TN decreased from 0.12 mg/L and 7.50 mg/L to 0.06 mg/L and 6.77 mg/L, respectively, and the aeration intensity decreased by 8.94%.
Last Update:
2023-10-01