摘要
为研究不同植物及组合(美人蕉+黄菖蒲、花叶芦竹、黄菖蒲、旱伞草)与不同填料(陶粒、沸石、改性沸石、改性钢渣)对系统处理分散性生活污水效能的影响,建立了8种不同配置的潜流式人工湿地中试系统。结果表明,各湿地对COD均具有较好的去除效果(去除率大于70%)。旱伞草、黄菖蒲+美人蕉、黄菖蒲和花叶芦竹四植物系统对TN的去除率均呈先降低后上升的趋势,最终平均去除率分别为57.8%、51.1%、50.4%和45.5%。改性沸石、沸石、陶粒和改性钢渣填料系统对TN平均去除率分别为96.4%、83.7%、34.6%和26.6%。各植物系统对TP的去除效果差异不显著,其中旱伞草系统TP平均去除负荷最大(0.63 g/(d·m2))。各填料对TP的去除效果从大到小依次为改性钢渣、改性沸石、陶粒、沸石,改性钢渣和改性沸石对TP的去除能力显著高于陶粒和沸石,平均去除率达86.3%和78.8%。研究表明,分别采用旱伞草和改性沸石为湿地植物和填料具有较好的应用前景。
The paper is aimed at exploring the efficiency of different configuration modes of the wetlands in dealing with the decentralized domestic sewage in constructed wetlands（ CWs）,which have long been acknowledged as a promising technology for in-situ treatment of the decentralized domestic sewage due to their easy management and maintenance. However,the treating behavior in the CWs is often considered to be a figurative black-box in which little is known as to the interaction among the vegetation,water and microorganisms. Therefore,in order to make out the effects of the different types of plants（ Cannaindica,Arundo donax var versicolor,Irispseudacorus,Cyperus alternifolius） and their combinations（ e. g. Cannaindica and Irispseudacorus） as well as the different types of substrates（ ceramsite,zeolite,modified zeolite,modified steel slag） on the removal efficiencies of the system,we have established 8 different modes of subsurface-configured wetland systems（ pilot-scale）,which are intended to be used for treating the decentralized domestic sewage. The results of our study have shown that all of the aforementioned wetland systems work well on the COD removal,with the average removal rate over70%. In addition,while the 8 systems were running stable,the TN removal rate of different plant systems has been firstly found decreased slightly,and then increased. The TN removal rate of the different plants can be illustrated from the best to the poorest in a descending order,that is,Cyperus alternifolius（ 57. 8%） Cannaindica with Irispseudacorus（ 51. 1%） 〉Irispseudacorus（ 50. 4%）〉 Arundo donax var versicolor（ 45. 5%）. As for TN,its removal rate of different substrates from the best to the poorest can also be shown in a descending order,that is,the modified zeolite（ 96. 4%）〉 zeolite（ 87. 6%） 〉ceramsite（ 34. 6%） 〉modified steel slag（ 26. 6%）. Nevertheless,the differences of TP removal efficiencies of different plants were not significant.Whereas cyperus has the best re
出处
《安全与环境学报》
CAS
CSCD
北大核心
2016年第4期332-337,共6页
Journal of Safety and Environment
基金
江苏省高校自然科学研究重大项目(12KJA610002)
苏州市环保科技项目(201309)
关键词
环境工程学
人工湿地
生活污水
湿地植物
改性填料
environmental engineering
constructed wetland
decentralized domestic sewage
wetland plant
modified carrier
