ABR处理垃圾渗滤液及其颗粒污泥的研究

Study on Treatment of Landfill Leachate and Its Granular Sludge with ABR

利用ABR-HBR工艺对广州大田山垃圾渗滤液生物处理系统进行改造。结果表明，ABR可有效提高垃圾渗滤液的可降解性，进水BOD5/COD为0.1时，出水BOD5/COD值提高到0.3左右。通过控制回流比在ABR中实现良好的厌氧氨氧化功能，当进水氨氮浓度为427-543 mg/L时，出水氨氮浓度降至315-443 mg/L，氨氮的去除率达25%；利用探针对ABR厌氧污泥进行原位杂交，结果显示，ABR厌氧污泥中有大量氨氧化细菌。工程运行240 d后，在ABR中观察到厌氧颗粒污泥，颗粒污泥的产甲烷活性较同格中絮状污泥提高82.2%。ABR各格中颗粒污泥的粒径大小存在差异，中间格中的颗粒污泥粒径较大，平均为1.20 mm，两端格中颗粒污泥的粒径平均为1.02 mm。

The biological treatment system on landfill leachate in Guangzhou Datianshan was remoulded with ABR-HBR techniques. The resuits showed that ABR could effectively improve the degradability of landfill leachate. When the BOD5/COD value of influent was 0. 1, the BOD5/COD value of effluent was increased to . about 0. 3. The anaerobic ammonium oxidation function was realized in ABR through controlling reflux ratio. When ammonia conen, of influent was 427 -543 mg/L, the ammonia cohen, of effluent was decreased to 315 -443 mg/L, the removal rate reached 25%. The in situ hybridization on anaerobic sludge in ABR was conducted, and the results showed that there were plenty of ammonia-oxidizing bacteria in anaerobic sludge in ABR. After 240 d of the engineering operating, the anaerobic granular sludge was observed in ABR, and the methanogenie activity of granular sludge was 82.2% higher than that of floeculent sludge in the same lattice. The panicle size of anaerobic granular sludge in lattices of ABR was different, that in middle lattices was bigger, being average of 1.20 mm and that in amphi of lattices was average of 1. 02 mm.