LOU Dan,MEI Zhu-song,CHEN Qian,et al.Case Analysis of DE Oxidation Ditch Expansion Project of Yuhang WWTP[J].China Water & Wastewater,2020,36(18 18):102-107.
Case Analysis of DE Oxidation Ditch Expansion Project of Yuhang WWTP
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
18 18
Page:
102-107
Column:
Date of publication:
2020-09-17
- Keywords:
- DE oxidation ditch; capacity expansion; mathematical model; electricity consumption; chemical consumption
- Abstract:
- According to the present situation of Yuhang Wastewater Treatment Plant (WWTP), the DE oxidation ditch was simulated by a mathematical model. Through a series of transformation measures such as improving aeration form, adding underwater thrusters, controlling aeration precisely, exploring potential and optimizing operation parameters, the total treatment capacity of Yuhang WWTP was expanded from 6×104 m3/d to 8×104 m3/d and the actual effluent quality reached local standard of Zhejiang Province. After expansion, the average effluent concentrations of COD, ammonia nitrogen and total nitrogen were 17.0 mg/L, 0.32 mg/L and 8.07 mg/L, respectively. Among them, the effluent concentration of COD and total nitrogen were significantly reduced and the operation stability was also better than before. After expansion reconstruction, the electricity consumption per ton of wastewater was basically the same as before, while the consumption of methanol per ton of wastewater decreased by 47.6%. The comprehensive energy consumption of Yuhang WWTP was decreased after expansion.
Last Update:
2020-09-17