排出厌氧富磷污水生物化学除磷脱氮ERP-SBR系统研究

ERP-SBR BIO-CHEMICAL PROCESS FOR NITROGEN AND PHOSPHORUS REMOVAL BY DRAINING OUT ANAEROBIC RICH PHOSPHATE SUPERNATANT

ERP-SBR工艺采用循环污泥技术借助化学方法固定厌氧富磷污水中的磷酸盐,将排除活性污泥的传统生物除磷模式变为排除富磷污水,消除了生物除磷脱氮过程中控制污泥龄时存在的矛盾,使生物除磷脱氮系统可以在较长污泥龄条件下获得优异的同时除磷脱氮效果。试验结果表明当SRT为50～80d、进水TN为28.6～58.3mg/L、TP=5.5～13.25mg/L时,ERP-SBR处理出水COD≤34mg/L、TN≤6.02mg/L、PO43-≤0.23mg/L,富磷污水化学固磷所需药剂用量为传统化学除磷法的5%,所得化学污泥含磷量为12～15%,可实现磷资源的回收。

ERP-SBR process adopting the circulating sludge technique and chemical method was used for fixing phosphate in anaerobic phosphorus-enriched sewage to change traditional biological mode of phosphorus removal for draining out active sludge into draining out phosphorus-enriched sewage ,eliminate the contradiction existing in controlling sludge age in the course of biological phosphorus removal and de-nitrogen and make the system of biological phosphorus removal and de-nitrogen obtain excellent effect of concurrent phosphorus removal and de-nitrogen under the condition of longer sludge age. The experimental results showed that, when SRT was 50～80d ,the influent water TN,28.6～58.3mg/L,TP,5.5～13.25mg/L,the effluent water's COD≤34mg/L,TN≤6.02mg/L and PO43-≤0.23mg/L;the usage of chemicals for chemically fixing phosphorus in phosphorus-enriched sewage was 5% of that for traditional chemical phosphorus removal; the phosphorus content of chemical sludge obtained was 12～15%,thus the reclamation of phosphorus resource can be realized .