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.
基于仿真模拟的污水厂工艺优化及运行管理
- Title:
- Process Optimization and Operation Management of Wastewater Treatment Plant Based on Numerical Simulation
- Keywords:
- wastewater treatment plant; process simulation; energy conservation and emissions reduction; operation optimization; seasonality
- 摘要:
- 基于活性污泥工艺模拟软件建立了某污水厂旱季和雨季时多级AO（多点进水）工艺的数学模型，经校核率定后优化了MLSS、进水比例和好氧池DO等运行参数，形成了旱季和雨季最佳的运行策略，使出水水质进一步提升，且降低了曝气和药剂投加的运行成本，达到了节能降耗的目标。结果表明，旱季和雨季生化池MLSS应分别控制在3.5~4和3~3.5 g/L范围内的较低水平；适当增加缺氧Ⅰ区的进水比例；在保证不出现亚硝酸盐积累的情况下，尽量降低两个好氧区DO，且优先考虑调整好氧Ⅰ区的DO。优化后，旱季出水氨氮、TN分别从0.10和8.03 mg/L降至0.06和7.24 mg/L，曝气量和硫酸铝药剂投加量分别减少14.3%和6.25%；雨季出水氨氮和TN分别从0.12和7.50 mg/L降低至0.06和6.77 mg/L，曝气量减少8.94%。
- 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%.
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