双室悬浮载体低温工业废水脱氮处理研究

根据生物脱氮原理设计了一套一体化反应器并将其用于工业废水处理,研究双室悬浮载体对工业废水脱氮影响的同时分析了系统中微生物群落的结构组成。结果表明:在低温状态下,双室载体内生物种类较多,且主要以杆菌为主,钟虫和线虫等也较多。COD去除率总体较低但相对稳定,各反应器平均去除率均在65%以上。双室悬浮载体比普通悬浮载体的氨氮和总氮去除率高7%~10%。对处理前后废水进行GC-MS扫描后发现,双室悬浮载体可去除废水中的苯酚类同系物及甲苯并具有一定的脱硫能力。以Grau模型计算了进水底物浓度变化时的底物降解常数,利用双室悬浮载体,HRT为20 h时的底物降解常数最大(0.358)。因此,双室悬浮生物载体对工业废水低温脱氮来说是一种较好的微生物载体。

Denitrification of Industrial Wastewater with a Bench-scale Double-room Suspended Carrier at Low Temperatures

This paper introduced the double-room suspended carrier,a laboratory installation of wastewater treatment specific for denitrification of industrial effluents at relatively low temperatures around 4°С.Observation by microscopy of microbes grown and attached on the carrier showed that their main species were Coli,Vorticella and Nematodes.As demonstrated by GC-MS,phenols and toluene,as well as a certain amount of sulfur could be removed by the double-room suspended carrier.In addition,Grau model was used to calculate the substrate degradation constant,which indicated the maximum degradation constant(0.358) was obtained when HRT extended to 20h.