• 关键词：多级土壤渗滤系统  BDPs  河道污水  脱氮  除磷

• 基金项目：国家重大水专项(No.2008ZX07102-003);国家自然科学基金面上项目(No.50978001); 国际合作研究项目(No. 2009DFA91780)

• 陈佳利
• 1. 湖南大学环境科学与工程学院,长沙 410082;
  2. 湖南大学环境生物与控制教育部重点实验室,长沙 410082;
  3. 北京大学环境科学与工程学院,北京 100871

• 吴为中
• 北京大学环境科学与工程学院,北京 100871

• 杨春平
• 1. 湖南大学环境科学与工程学院,长沙 410082;
  2. 湖南大学环境生物与控制教育部重点实验室,长沙 410082

• 严森
• 1. 湖南大学环境科学与工程学院,长沙 410082;
  2. 湖南大学环境生物与控制教育部重点实验室,长沙 410082

• 沈志强
• 清华大学核能与新能源技术研究院,北京 100084

• 摘要：针对受污染的流入滇池的河流河水,采用具有曝气段和缺氧段的两段式多级土壤渗滤(multi-soil-layering,MSL)系统,开展了在缺氧段添加非水溶性可生物降解多聚物(BDPs)材料PBS颗粒的强化脱氮除磷研究.结果表明,添加PBS碳源可有效解决传统MSL系统因碳源不足而导致的脱氮效果不理想的问题.在河水污染较轻及较重两种情况下,系统对TN的平均去除率分别达到78%、85%,平均单位表面去除负荷 分别为9.09 g·m^-2·d^-1、24.55 g·m^-2·d^-1;TP平均去除率分别达到92%、98%,平均单位表面去除负荷分别为0.76 g·m^-2·d^-1、2.02 g·m^-2·d^-1. 此外,系统对COD的平均去除率可达到75%以上.

• Abstract：To investigate the polluted river water flowing into the Dianchi Lake, we carried out a study aiming at strengthening nitrogen and phosphorus removal through adding PBS particles, a kind of water-insoluble biodegradable polymers pellets (BDPs) to anoxic phase, by using a two-stage multi-soil-layering (MSL) system with aeration phase and anoxic phase. The results indicated that the addition of PBS carbon resource can effectively improve the poor removal efficiency of nitrogen in traditional MSL system for the lack of carbon resource. Under the conditions of serious and light pollutions, the average removal rate of TN were 78% and 85%, and the reduction loads were 9.09 g·m^-2·d^-1 and 24.55 g·m^-2·d^-1, respectively. The average removal rate of TP were 92% and 98%, and the reduction loads were 0.76 g·m^-2·d^-1 and 2.02 g·m^-2·d^-1, respectively. In addition, the average removal rate of COD were up 75%.

• Key words：multi-soil-layering system  biodegradable polymers pellets  river wastewater  the removal of nitrogen  the removal of phosphorus

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