水解—SBR工艺处理规模化猪场粪污研究

采用水解－SBR工艺进行了规模化猪场粪污处理试验。水解过程水力停留时间（HRT）为2．0－6．0h,对COD、BOD5、SS、TN的去除率分别为30．1％－47.3%、45．8％－49．4％、56．0％－61．1％、22．3％和55．3％，NH3－N几乎没有去除，水解对COD的去除效率比沉淀处理高17％；SBR的HRT为1．0－1．4d，对COD、BOD5、SS的去除率分别为52．1％－82．1％、89．0％－95．7％、93．9％－97．3％，但出水中仍残留相当数量的难降解COD。SBR对氮有较好的去除效果（TN去除率为74．1％），特别是对高浓度NH3－N的去除取得了相当好的结果（去除率达97％以上）。曝气量对SBR去除NH3－N有显著影响，增加曝气量可以缩短HRT。对比试验证明，NH3－N的去除不是依靠吹脱作用，而是依靠微生物的降解作用。

Treatment of Piggery Wastes with Hydrolysis-SBR Process

Hydrolysis-SBR process was studied on treatment of piggerywastes.When the hydra u lic retention time (HRT) of the hydrolysis process is 2.0 ～6.0 h,the remov al rates for COD,BOD5,SS,TN and TP are 30.1%～47.3%,45.8 %～49.4%,56.0%～61.1%,22.3% and 55.3% respectively,whereas NH3-N is hardly rem oved.The removal rate for COD by hydrolysis is 17% higher than that by sedim entation at the same HRT.When the HRT of SBR process is 1.0～1.4 d,the r emoval rates for COD,BOD5 and SS are 52.1%～82.1%,89.0%～95 .7% an d 93.9%～97.3% respectively,but there is a certain concentration of inert COD in the effluent.SBR process is fairly efficient for TN removal with remov al rate of 74.1%,especially for higher concentrations of NH3-N with removal rate in excess of 97%.Increase of aeration rate can decrease HRT.Control test shows that removal of NH3-N relies on biodegradation rather than on air stripping.