摘要
以经筛选得到的本地优势浮萍为供试材料,以经稀释的养猪场废水为供试污水,考察了模拟冬季气象条件下浮萍单种体系和浮萍-水花生、浮萍-水葫芦混养体系对污水氮、磷的净化效果及植物生长情况,并与年平均气象条件下的相关结果作对比分析。结果表明,相对于年平均气象条件下的试验结果,冬季气候条件下三种体系对供试废水COD、NH4+-N和TP的去除速率和总去除率均有所下降,最大降幅均出现在浮萍单种体系,而混养体系表现较为稳定,尤其是浮萍-水花生混养体系,其对上述污染物的总去除率均维持在80%左右。浮萍混养体系对废水污染物的去除受冬季气候影响较小,利用其处理废水可克服冬季气候对浮萍单种体系污水处理系统的不良影响,通过合理的工艺组合,可实现浮萍污水处理系统全年气候下的连续运行和对污水氮、磷的高效去除。
Based on the screening of dominant species of local duckweed, removals of pollutants such as COD, NH4^＋-N and TP in swine wastewater are investigated through a laboratory experiment under simulated winter climate condition. Three systems are compared in respect of contaminants removal capacity including single duckweed, duckweed plus Alternanthera philoxeroides and duckweed plus hyacinth. The experimental result indicates that the accrete system, especially duckweed plus Alternanthera philoxeroides, is better in sustaining the adverse winter weather, keeping the pollutants removal still around 80%.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2009年第9期27-31,共5页
Environmental Science & Technology
基金
江苏省低维材料化学重点建设实验室开放课题(JSKC07056)
淮阴师范学院青年优秀人才支持计划(08QNZCK008)
关键词
浮萍
放养体系
养猪场废水
duckweed
cultured system
swine wastewater
