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An innovative integrated system utilizing solar energy as power for the treatment of decentralized wastewater

查看全文 作　　者：Changfu [1]Han;Junxin [1]Liu;Hanwen [1]Liang;Xuesong [1]Guo;Lin [1]Li 高影响力作者 机构地区：[1]Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences高影响力机构 出　　处：《Journal of Environmental Sciences》索引2013年第25卷第2期,共6页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China (No.51138009, 50678170) 摘　　要：This article reports an innovative integrated system utilizing solar energy as power for decentralized wastewater treatment, which consists of an oxidation ditch with double channels and a photovoltaic (PV) system without a storage battery. Because the system operates without a storage battery, which can reduce the cost of the PV system, the solar radiation intensity affects the amount of power output from the PV system. To ensure that the power output is sufficient in all different weather conditions, the solar radiation intensity of 78 W/m 2 with 95% confidence interval was defined as a threshold of power output for the PV system according to the monitoring results in this study, and a step power output mode was used to utilize the solar energy as well as possible. The oxidation ditch driven by the PV system without storage battery ran during the day and stopped at night. Therefore, anaerobic, anoxic and aerobic conditions could periodically appear in the oxidation ditch, which was favorable to nitrogen and phosphate removal from the wastewater. The experimental results showed that the system was efficient, achieving average removal efficiencies of 88% COD, 98% NH 4 + -N, 70% TN and 83% TP, under the loading rates of 140 mg COD/(g MLSS·day), 32 mg NH 4 + -N/(g MLSS·day), 44 mg TN/(g MLSS·day) and 5 mg TP/(g MLSS·day). 关 键 词：集成系统 污水处理 太阳能 分散式 太阳光发电系统 创新 太阳辐射强度 MLSS
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