Abstract:

A sequencing batch reactor（SBR）was used to remove high concentration nitrogen，phosphorus and COD in the abattoir wastewater. The results showed that step-feed could avoid high-level build-up of nitrate and nitrite during the nitrification and create anaerobic conditions for biological phosphorus removal. Two types of abattoir wastewater were used as raw wastewater，one was the effluent from abattoir wastewater and the other was the pre-fermentor wastewater. After a 3-month start-up，removal efficiencies of total phosphorus，total nitrogen and COD were higher than 96%，95% and 95.5%，respectively，when total phosphate，total nitrogen and COD in the influent were 36.5 mg/L，226 mg/L and 2615 mg/L，respectively，under the condition of a sludge age of 14 days at 35 ℃.The concentrations of total phosphate，total nitrogen and COD in the effluent were lower than 1.4 mg/L，10.8 mg/L and 95 mg/L，respectively.

摘要：

研究了采用序列间歇式活性污泥法（SBR工艺）同步去除屠宰废水中高浓度氮、磷和COD。结果表明，SBR工艺采用分步进水，避免了硝化阶段NO₃-N和NO₂-N的积累，能够提供生物除磷所需的厌氧环境。在温度为35 ℃、污泥龄为14天的条件下，采用两种成分废水作为原水（预发酵废水和屠宰废水混合），经过3个月的启动，当原水中TP、TN和COD浓度分别为36.5 mg/L、226 mg/L和2615 mg/L时，TP、TN和COD的去除率分别高于96%、95%和95.5%，出水中TP、TN和COD浓度分别低于1.4 mg/L、10.8 mg/L和95 mg/L。