ABR反应器处理山梨酸废水的启动试验

目的]寻找经济、有效的山梨酸废水的处理工艺。方法]采用ABR高效厌氧反应器,进行山梨酸生产废水的启动试验。结果]在35℃条件下,经历190d,成功地完成对ABR反应器的启动。进水COD容积负荷由0.26kg/（m3.d）增加到2.16kg/（m3.d）,COD去除率达到93%,挥发性脂肪酸（VFA）和pH值也达到要求。在ABR反应器中形成大量性能良好的颗粒污泥,其尺度介于2～5mm。电镜分析表明,不同隔室内呈现种群配合良好的厌氧微生物分布,且各隔室中的颗粒污泥形状各异,表面凸凹不平,存在气孔。第1隔室存在大量优势发酵细菌,沿水流方向颗粒污泥中的微生物逐渐向产甲烷细菌菌群过渡。结论]好氧处理前先采用厌氧法进行处理,可以完成ABR反应器处理山梨酸生产废水的启动。

Start Experiment of Treating Sorbic Acid Wastewater with ABR

Objective] The research aimed to study an economic and effective sorbic acid wastewater treatment technology. Method] The starting of anaerobic baffled reactor (ABR) treating sorbic acid wastewater was studied. Result] The reactor was maintained at a hydraulic retention time(HRT) of 24 h and a temperature of 35 ℃ during performance study stage. When the start-up of the ABR was finished through 190 days,the volumetric loading rate (VLR) was changed from 0.26 to 2.16 kg/(m3·d). COD removal efficiency reached 93% with suitable values of volatile fatty acid (VFA) and pH. Granules were existed in six compartments at the end of the experiment,whose size was 2-5 mm. The microscopic analysis results showed that cooperative anaerobic microbial populations distributed within different compartments. The dominant bacteria in the compartment one were fermentative bacteria. Towards the end of the reactor,the dominant bacterial populations shifted stepwise to Methanogenic bacteria in granular sludge. As to single granular sludge with different shape,the air holes were in its uneven surface. Conclusion] The treatment with anaerobic method before aerobic process could accomplish the start-up of anaerobic baffled reactor (ABR) treating sorbic acid wastewater.