[1]周骅,蒋玲燕,薛松.上海静默管理期间污水厂进水波动分析及运行策略[J].中国给水排水,2022,38(19):1-7.
ZHOUHua,JIANGLing-yan,XUESong.Influent Fluctuation Analysis and Operation Strategy of Wastewater Treatment Plants during Shanghai’s City-wide Lockdown Period[J].China Water & Wastewater,2022,38(19):1-7.
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ZHOUHua,JIANGLing-yan,XUESong.Influent Fluctuation Analysis and Operation Strategy of Wastewater Treatment Plants during Shanghai’s City-wide Lockdown Period[J].China Water & Wastewater,2022,38(19):1-7.
上海静默管理期间污水厂进水波动分析及运行策略
中国给水排水[ISSN:1000-4062/CN:12-1073/TU]
卷:
第38卷
期数:
2022年第19期
页码:
1-7
栏目:
出版日期:
2022-10-01
- Title:
- Influent Fluctuation Analysis and Operation Strategy of Wastewater Treatment Plants during Shanghai’s City-wide Lockdown Period
- Keywords:
- COVID-19 epidemic; city-wide lockdown; combined drainage system; influent fluctuation; residual chlorine; exploiting potential
- 摘要:
- 为应对新冠肺炎疫情，上海市在2022年3月底—6月初实施了全市静默管理。作为特大型城市，其工作和生活方式以及产业结构的突变势必对产水特征、污水组分、污水处理厂进水条件以及生产运行造成影响，为此对静默管理期间上海中心城区污水处理厂的进水水量、水质和典型污水厂的主要运行应对措施进行了分析，旨在为今后污水厂再遇到类似情形时的提前预警和防范提供参考。为消除合流制排水系统雨止后的滞后效应导致的干扰，研究了降雨条件和污水厂进水水量、水质的对应关系，建立了“雨日”和“统计旱天”的判别方法。经对近3年来上海中心城区污水处理厂旱季同期数据进行对比分析，发现静默管理期间的进厂水量和水质均呈现逆走势，水量同比下降6%，水质指标COD降幅达33%、氨氮下降17%，大量含氯消毒药剂的投加导致部分污水厂进水余氯浓度有所增加。基于现有污水处理设施的工艺流程和设计参数分析，最终采用了运行挖潜的方式，通过强化预处理、延长泥龄、控制生物段溶解氧、增加除磷药剂投加等措施，实现了稳定运行和达标排放。
- Abstract:
- The city-wide lockdown management was implemented in Shanghai from the end of March to the beginning of June in response to the prevention and control of COVID-19 epidemic. The sudden change of the way of work, lifestyle and industrial structure in the megacity would inevitably influence the characteristics of wastewater production, the composition of wastewater, the influent conditions, and operations of wastewater treatment plants (WWTPs). The main countermeasures of operation in typical WWTPs were analyzed, which could provide a reference for early-warning and precaution when similar situations occur in WWTPs in the future. In order to eliminate the interference caused by the hysteresis effect after the rain stops in the combined drainage system, the corresponding relationship between the rainfall conditions and the influent quantity and quality of WWTPs was studied. The new statistical standard was established for distinguishing “rainy days” or “count dry days”. The contemporaneous data of WWTPs in Shanghai central area during dry season in the past three years was analyzed. It was found that the quantity and quality of the influent showed a reverse trend during Shanghai’s city?wide lockdown period. The quantity of wastewater decreased by 6% in the corresponding period, and the concentration of COD and NH3-N decreased by 33% and 17%, respectively. The addition of a large amount of chlorine?containing disinfectants led to an increase in the concentration of residual chlorine in the influent of some WWTPs. Based on the analysis of treatment process and design parameters of the existing WWTPs, the operation mode of exploiting potentialities was finally adopted. WWTPs operated stably and the effluent quality could meet the discharge standards through measures such as strengthening pretreatment, prolonging sludge retention time, controlling the concentration of dissolved oxygen in the biological reaction section, and increasing the dosage of phosphorus removal agents.
更新日期/Last Update:
2022-10-01