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化工学报  2015 

木质框架土壤渗滤系统处理养猪废水厌氧消化液的效能

DOI: 10.11949/j.issn.0438-1157.20150111, PP. 2248-2255

Keywords: 养猪废水,厌氧消化液,废物处理,填充床,渗透,脱氮

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Abstract:

为处理高氨氮、低C/N比的养猪废水厌氧消化液,构建了具有缓释碳源特性的木质框架土壤渗滤系统(WFSI),并通过运行测试了进水浓度和表面水力负荷(SHL)对系统处理效能的影响。在SHL为0.2m3·m-2·d-1条件下,当进水COD和NH4+-N平均浓度分别从152和175.5mg·L-1提高到421和788.7mg·L-1时,系统对COD的去除率从52.3%提高到61.2%,NH4+-N去除率从84.2%下降到61.5%,TN去除率从28.6%提高到了33.5%,NH4+-N和TN去除负荷分别达到了75.5和41.7g·m-3·d-1。当SHL提高为0.32m3·m-2·d-1时,系统仍能维持运行,但处理效能受到显著影响。在进水COD和NH4+-N分别为265和465mg·L-1左右时,COD、NH4+-N及TN的去除率分别平均为56.5%、53.3%和20.9%。木质填料及其附着层形成的NH4+-N浓度梯度,可使系统承受较高的SHL的同时获得缓释碳源,并保护氨氧化细菌免受自由氨毒性。

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