SBR串联生物强化稳定塘处理养猪废水工艺优化  

Process optimization of SBR-biological stabilization ponds for swine wastewater treatment

作　　者：郑效旭 李慧莉[1] 徐圣君[2] 张宝 张旭坡 安娜 白志辉[2,3] ZHENG Xiaoxu;LI Huili;XU Shengjun;ZHANG Bao;ZHANG Xupo;AN Na;BAI Zhihui(College of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Bejing 100085,China;College of Resources and Environment,University of Chinese Academy of Sciences,Beiing 100049,China)

机构地区：[1]兰州理工大学土木工程学院,兰州730050 [2]中国科学院生态环境研究中心,北京100085 [3]中国科学院大学资源与环境学院,北京100049

出　　处：《环境工程学报》2020年第6期1503-1511,共9页Chinese Journal of Environmental Engineering

基　　金：中国科学院重点部署项目(ZDRW-ZS-2016-5);国家水体污染控制与治理科技重大专项(2015ZX07206006)。

摘　　要：针对亚热带地区某规模化养猪场SBR处理低碳氮比(C/N)沼液出水不达标的问题,研究了以乙酸钠为速效碳源时其投加量对SBR运行效果的影响,并采用4级串联生物强化稳定塘工艺对SBR出水进行强化处理。结果表明:当乙酸钠投加量为400 mg·L-1时,SBR工艺对COD、氨氮和总氮的平均去除率分别从16%±1%、25%±4%和14%±1%提高到了32%±1%、55%±2%、27%±4%;串联生物强化稳定塘(BSPs)工艺对COD、氨氮、总氮和总磷的平均去除率达到了65%±2%、80%±4%、79%±3%和83%±4%,出水平均浓度分别为(155±5)、(67±2)、(89±2)和(6±1) mg·L-1,均可满足《畜禽养殖业污染物排放标准》(GB 18596-2001)的要求。以生物膜和双穗雀稗构成的前2级生物强化稳定塘系统对COD、氨氮、总氮和总磷的消纳量分别占整个串联稳定塘系统消纳量的57%、50%、51%和81%。进一步分析可知,串联生物强化稳定塘工艺对养猪废水主要污染物(COD、氨氮、总氮、总磷)的去除效果显著,采用此技术可实现废水的达标排放。In order to solve the problem not up to the regulatory standards for sequencing batch reactor(SBR)effluent during treating the low C/N ratio swine wastewater from a large-scale pig farm in a subtropical area, the influence of sodium acetate dosage on the SBR treatment of swine wastewater was studied. In addition, a fourstage biological stabilization ponds(BSPs) was used to strengthen the SBR effluent treatment. The results showed that at sodium acetate dosage of 400 mg·L-1, the average removal rates of COD, ammonia nitrogen, and total nitrogen in the SBR were improved from 16%±1%, 25%±4%, 14%±1% to 32%±1%, 55%±2%, 27%±4%,respectively. The average removal rates of COD, ammonia nitrogen, total nitrogen and total phosphorus in the fourstage BSPs were 65%±2%, 80%±4%, 79%±3% and 83%±4%, respectively, and their corresponding average effluent concentrations were(155±5),(67±2),(89±2) and(6±1) mg·L-1, respectively, all of which met the requirements of the Discharge Standards of Pollutants for Livestock and Poultry Breeding(GB 18596-2001). The first two stages of the BSPs, which consisted of biofilms and Paspalumdistichum, could account for 57%, 50%,51% and 81% of the total reduction of COD, ammonia nitrogen, total nitrogen, and total phosphorus along the entire BSPs, respectively. These results indicated that SBR-biological stabilization ponds could achieve the significant removal effects on the main pollutants in swine wastewater, such as COD, ammonia nitrogen, and total nitrogen and total phosphorus, and realize the discharge standard.

关 键 词：养猪废水 序批式活性污泥法(SBR) 生物强化稳定塘(BSPs) 双穗雀稗 生物膜 

分 类 号：X703.1[环境科学与工程—环境工程]