• 关键词：土壤渗滤系统  养猪废水  分流比  脱氮

• 基金项目：福建省科技计划重点项目(No.2012Y0068);福建省区域重大科技项目(No.2010N3004);福建省星火计划重点项目(No.2011S0011);莆田市科技计划院地合作项目(No.2012S15);"十二五"国家水专项课题(No.2012ZX07302-002)

• 王振
• 1. 中国科学院城市环境研究所, 厦门 361021;
  2. 中国科学院大学, 北京 100049

• 刘超翔
• 中国科学院城市环境研究所, 厦门 361021

• 董健
• 1. 中国科学院城市环境研究所, 厦门 361021;
  2. 中国科学院大学, 北京 100049

• 郑加玉
• 1. 中国科学院城市环境研究所, 厦门 361021;
  2. 东北林业大学林学院, 哈尔滨 150040

• 廖德润
• 1. 中国科学院城市环境研究所, 厦门 361021;
  2. 中国科学院大学, 北京 100049

• 黄栩
• 中国科学院城市环境研究所, 厦门 361021

• 刘琳
• 中国科学院城市环境研究所, 厦门 361021

• 林国徐
• 优利可农牧发展有限公司, 莆田 351100

• 摘要：针对污染物浓度较高的养猪废水,开展了不同分流比条件下土壤渗滤系统处理效果的对比研究,并分析了分流比对系统中脱氮微生物数量及氧化还原电位(ORP)变化的影响.试验结果表明,分流比对土壤渗滤系统的脱氮效果影响较大,而对COD、TSS和TP的去除效果无明显影响,当水力负荷(HLR)为0.01 m³·m^-2·d^-1且分流比为1:2时,系统对TN的去除效果最好,平均去除率达80.20%,而对其他污染物的平均去除率均可达90%以上;分流比可影响土壤渗滤系统中脱氮微生物的数量,分流比的增大可促进系统中反硝化细菌数量的增加,强化系统的脱氮效果;另外,分流比还可影响系统填料层中ORP的变化.因此,根据系统进水水质选择合适的分流比,是强化土壤渗滤系统脱氮效果的关键因素.

• Abstract：A comparative study of constructed soil infiltration system (SIS) with four different diffluent ratios in treating swine wastewater was carried out when the hydraulic loading rate (HLR) was 0.01 m³·m^-2·d^-1. The effect of diffluent ratio on the quantity of nitrogen transformation bacteria and the ORP values at different depths in the system was also investigated. The results showed that diffluent ratio could significantly influence the nitrogen removal of SIS, whereas it had no significant influence on the removal of COD, TSS and TP. With the diffluent ratio of 1:2, SIS had the best effect on treating swine wastewater, especially TN. Average removal efficiencies of SIS were as follows: 93.58% for TSS, 92.81% for COD, 91.86% for NH₄⁺-N, 99.83% for Organic N, 80.20% for TN, and 92.14% for TP, respectively. The quantity of nitrogen transformation bacteria could be influenced by diffluent ratio in the system, and the nitrogen removal of SIS was strengthened because of the increasing denitrifying bacterial quantity along with increasing diffluent ratio. In addition, the ORP values at different depths of packing layer fluctuated with the change of diffluent ratio. Accordingly, it was implied that suitable diffluent ratio was the key factor for nitrogen removal when SIS treating swine wastewater.

• Key words：constructed soil infiltration system (SIS)  swine wastewater  diffluent ratio  nitrogen removal

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