水解酸化-SBR工艺处理果汁废水的研究

Study on treatment of syrup wastewater with hydrolysis acidification-SBR technology

采用水解酸化-SBR工艺，对浓缩果汁生产废水处理进行了试验研究，结果表明：当进水COD浓度为3500～5000mg／L，pH为6．5～7．5，在水解酸化池水力停留时间为8h，SBR反应池MLSS浓度3500～4000mg／L，进水15min，曝气7h，沉淀1h，出水15min的条件下，出水COD去除率保持在97％以E，SS去除率达93％以上。且以水解酸化作为预处理单元可去除果汁废水中的SS达78％以上，为后续SBR工艺的稳定运行创造有利条件，提高组合工艺的整体效果。

An experimental study on syrup wastewater treatment with hydrolysis acidification-SBR technology was carried out. The results showed that when the COD of influent was 3 500 ～ 5 000 mg/L and the pH of influent was 6.5 ～ 7.5, COD and SS removal rates of the wastewater were over 97% and 93% through the combined technology, the optimal HRT of hydrolysis acidification was 8 h, the optimal MLSS concentration of SBR was about 3 500 ～4 000 mg/L, the times for inflow,aeration,settlement and outflow were 15 rain,7 h,1 h and 15 rain,respectively. The experiment also demonstrated that the SS was removed mostly through the hydrolysis acidification process （more than 78% ） , which can create a suitable condition for the subsequent SBR process and enhance the efficiency of the combined technology.