FCR多级接触氧化系统处理乳品工业废水的研究

Study on Treatment of Simulant Dairy Processing Wastewater Using FCR Multilevel Contact Oxidation System

为提高乳品工业废水生物处理的去污脱氮能力,以新型螺旋状纤维填料作为载体,采用多级氧化槽内不同种类微生物形成的食物链系统（food chain reactor）,详细考察了不同水力停留时间COD、TN、NH4^＋-N、TP等的去除率及其去除机理,并对污泥减量化效果进行了初步探讨.结果表明,当进水COD为842-1 843 mg/L、TN为36.3-92.2 mg/L、NH4^＋-N为30.1-52.1 mg/L,HRT=6 h时,系统COD的平均去除率达到93.3%;TN和NH4^＋-N的去除效果显著,其平均去除率分别达到73.3%和80.7%,出水COD、TN、NH4^＋-N平均值分别为79.4 mg/L、9.6 mg/L、6.1 mg/L,均低于《污水综合排放标准》（GB 8978-2002）的一级标准.该系统不仅具有较高的去污脱氮效果,而且产生的剩余污泥量极少,其污泥产率的平均值为7.7%.该系统运行费用低,操作管理方便,长期运行稳定,可应用于城市污水、中高浓度有机废水（如餐厅污水、食品工业废水）等的处理.

This study applied new helical-fibrous fillers as carrier to treat simulant dairy industrial wastewater in order to improve the ability of nitrogen removal and decontamination.Based on multilevel oxidation system where the food chain was formed by different kinds of microbe,removal ratio and removal mechanism of COD,TN,NH4^＋-N,TP under different HRT and effect of sludge reduction were discussed.When COD of influent was 842～1843mg/L,TN concentration was 36.3～92.2mg/L,NH4^＋-N concentration was 30.1～52.1mg/L,and HRT was 6h,the removal ratio of COD,TN and NH4^＋-N was 93.3%,73.3% and 80.7% respectively.COD, TN and NH4^＋-N for effluent was 79.4mg/L,9.6mg/L and 6.1mg/L, both bellow the first degree of Integrated Wastewater Discharge Standard（GB 8978-2002）.This system not only could remove nitrogen effectively,but also discharged little excessive sludge,and the average sludge production was 7.7%.It shows that this system could be conveniently operated and be used in the long term with low cos t,and could be used in treating municipal wastewater and high concentration organic wastewater such as restaurant wastewater and food industry wastewater.