3种组合工艺深度处理污水处理厂二级出水的研究

Study on the advanced treatment of secondary effluent by three advanced wastewater treatment trains

以污水处理厂实际二级出水为研究对象,探讨了混凝沉淀过滤、混凝沉淀-曝气生物滤池和臭氧-生物活性炭3种污水深度处理组合工艺对二级出水中有机物、氮磷和荧光特性的去除效果。结果表明,臭氧-生物活性炭对于COD、UV254和色度的去除效果优于混凝沉淀过滤和混凝沉淀-曝气生物滤池;混凝沉淀-曝气生物滤池对氨氮、亚硝氮的去除更有优势;混凝沉淀过滤对磷的去除效能最高;3种组合工艺对硝氮都没有明显的去除。三维荧光光谱分析结果表明,臭氧能够有效去除腐殖酸类荧光物质。

This paper investigated the removal of organic matter,nitrogen,phosphorus and fluorescence components from real secondary effluent by the coagulation sedimentation filtration,coagulation sedimentation-biological aerated filter and ozone-biological activated carbon filter.Results showed that ozone-biological activated carbon was better than coagulation sedimentation filtration and coagulation sedimentation-biological aerated filter in removing COD,UV254 and chromaticity.Coagulation sedimentation-biological aerated filter had the advantage on the removal of ammonia nitrogen and nitrite nitrogen.Coagulation sedimentation filtration had the highest removal efficiency for phosphorus.Three combined processes had no significant removal on NO-3-N.Ozone could effectively remove humic acid fluorescent components.