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
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摘要: 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3 500～5 000 mg/L，pH为6.5～7.5，在水解酸化池水力停留时间为8 h，SBR反应池MLSS浓度3 500～4 000 mg/L，进水15 min，曝气7 h，沉淀1 h，出水15 min的条件下，出水COD去除率保持在97％以上，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。Abstract: 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 min,7 h,1 h and 15 min,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.
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Key words:
- syrup wastewater /
- hydrolysis acidification /
- SBR /
- COD /
- SS
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