摘要
用电量和药剂投加量是城市污水处理厂运行的主要成本,也是污水处理厂减污降碳的重要环节。西南丘陵城市具有地势落差大、雨污收集速度快、地下水渗入率较高等显著区域特征,但其城市污水处理中的电力和药剂使用量和使用效率仍不清楚。分析了西南丘陵城市泸州中心区5座城市污水处理厂电力、混凝剂和碳源的使用量和使用效率。研究发现,电力和药剂使用量具有显著的季节特征,夏季降雨较多时的用电量和药剂用量较高。泸州市中心城区污水处理厂的单位处理水量的用电量为0.28~0.46 kW·h·m^(-3),位于全国28%~66%;单位总磷去除量的混凝剂用量为25.11~53.57 mg·mg^(-1),单位总氮去除量的碳源(折合COD计)投加量为0.60~4.88 g·g^(-1),位于全国44%~95%。泸州中心区城市污水处理厂的电力使用效率较高,但碳源使用效率较低,脱氮工艺和操作仍有待优化。本研究可为长江上游地区丘陵城市污水处理厂的优化运行管理和节能降耗工作提供参考。
Electricity consumption and chemical dosage are major costs in the operation of urban wastewater treatment plants and important aspects of reducing pollution and carbon in wastewater treatment plants.Southwestern hilly cities have significant regional characteristics such as large terrain drop-offs,rapid rainwater collection rates,and high groundwater infiltration rates,but the amount and efficiency of electricity and chemical use in their urban wastewater treatment remains unclear.The usage and efficiency of electricity,coagulant,and carbon source in five urban wastewater treatment plants in the central area of the southwestern hilly city of Luzhou were analyzed in this paper.It was found that electricity consumption and chemical dosage had significant seasonal characteristics,with higher electricity and chemical usage in summer due to more rainfall.The electricity consumption per unit of treated water volume in the central urban wastewater treatment plant in Luzhou ranged from 0.28 to 0.46 kW·h·m^(−3),located at 28%~66%nationally.The coagulant dosage per unit of total phosphorus removal ranged from 25.11~53.57 mg·mg^(−1),and the carbon source dosage per unit of total nitrogen removal ranged from 0.60~4.88 g·g^(−1)(reduced COD value meter),located at 44%~95%nationally.The central area of Luzhou urban wastewater treatment plant had a high efficiency of power utilization but a low efficiency of carbon source utilization,and the denitrification process and operation still needed to be optimized.This study can provide important basic information for the optimal operation and management of urban wastewater treatment plants in hilly cities to save energy and consumption reduction in the upper Yangtze River region.
作者
秦元初
王文龙
吴乾元
陈卓
巫寅虎
贾海峰
刘方华
王方
胡洪营
QIN Yuanchu;WANG Wenlong;WU Qianyuan;CHEN Zhuo;WU Yinhu;JIA Haifeng;LIU Fanghua;WANG Fang;HU Hongying(Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety,Key Laboratory of Microorganism Application and Risk Control of Shenzhen,Institute of Environment and Ecology,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China;State Key Joint Laboratory of Environmental Simulation and Pollution Control,Beijing Laboratory for Environmental Frontier Technologies,School of Environment,Tsinghua University,Beijing 100084,China;Luzhou Housing and Urban-Rural Development Bureau,Luzhou 646000,China;Luzhou City Landscape and Greening Service Centre,Luzhou 646000,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2023年第8期2449-2457,F0002,共10页
Chinese Journal of Environmental Engineering
基金
泸州市海绵城市科研课题研究项目(N5105012022000106)
国家自然科学基金资助项目(52000115)。
关键词
泸州市
城市污水处理厂
用电量
混凝剂
碳源
Luzhou City
urban wastewater treatment plant
electricity consumption
coagulant
carbon source
