生态沟渠处理分散养猪冲洗水特性研究

Study on Characteristics of Ecological Ditch Rinse Water Treatment in Raising Pigs

为强化去除分散养猪冲洗水中的有机物和营养元素,基于生物沸石吸附-再生和固体碳源强化反硝化技术,构建多级生态沟渠系统,并考察其间歇运行性能及水力负荷对系统的影响。结果表明,多级沟渠进一步处理分散养猪冲洗水(先经序批式ABR处理),出水平均COD、氨氮(NH+4-N)、总氮(TN)和总磷(TP)分别为192.0、25.74、60.64和2.63mg/L,符合畜禽养殖业污染物排放标准。进水流量为5L/d时,2号沟渠平均硝酸盐氮(NO-3-N)累积量为75 mg/L左右,NH+4-N去除量为65 mg/L左右,二者大致平衡;稻秆充足时,3号沟渠对NO-3-N的去除量为80 mg/L左右。

To intensively remove the organics and nutrient elements in pig -raising rinse water,we apply the bioze-olite regeneration ability and solid carbon source denitrification techniques to build multistage ecological ditch sys-tem;moreover,we study the performance and effect as well.It turns out that the average COD,NH ＋4 -N,TN and TP are 192.0,25.74,60.64 and 2.63mg/L respectively,which accord with the livestock and poultry industry pollution discharge standard.When the feed water is 5L/d,the average NO -3 -N in the second ditch is about 75 mg/L and the removal of NH ＋4 -N is 65 mg/L,which could keep a balance.On the condition of enough rice straw,the removal of NO -3 -N is 80 mg/L.