MBBR用于西南某污水厂准Ⅳ提标改造冬季脱氮性能研究  

Research on the denitrification performance in winter of MBBR used for the standard IV upgrading and renovation of a WWTP in Southwest China

作　　者：吴迪 陈黎明 杨忠启 周家中 郑志佳 韩文杰 WU Di;CHEN Liming;YANG Zhongqi;ZHOU Jiazhong;ZHENG Zhijia;HAN Wenjie(Biofilm Research Institute,Qingdao SPRING Water Treatment Co.Ltd.,Qingdao 266510,China;Qingdao Key Laboratory of Green and Low Carbon Biofilm and Water Environment Restoration,Qingdao 266510,China;Central&Southern China Municipal Engineering Design and Research Institute Co.,Ltd.,Fuzhou 350001,China)

机构地区：[1]青岛思普润水处理股份有限公司,生物膜研究院,青岛266510 [2]青岛市绿色低碳生物膜与水环境恢复重点实验室,青岛266510 [3]中国市政工程中南设计研究总院有限公司,福建福州350001

出　　处：《环境工程学报》2024年第12期3652-3662,共11页Chinese Journal of Environmental Engineering

基　　金：泰山产业领军人才工程专项资助项目(tscx202211036)。

摘　　要：为验证工程中MBBR工艺处理性能,探索生物膜SND效果来源及优化控制方法,研究生物膜与活性污泥菌群组成差异,以西南某CASS污水厂采用Bardenpho-MBBR工艺进行准Ⅳ类提标改造为例,采用改造前后运行效果对比,改造后沿程水质测定、小试验证、高通量分析结合文献对比讨论等方式分析了改造后系统脱氮性能。结果表明,本项目改造后在冬季进水氮素负荷提升20%左右基础上,核心出水指标稳定优于准Ⅳ类水。MBBR系统最高硝化负荷可达0.286 kg·(m^(3)·d)^(−1),悬浮载体硝化贡献率74.83%,且系统仍存在56.96%的水质及30.57%的水量提升潜力。MBBR区通过悬浮载体SND作用产生近10%TN去除效果,通过调控MBBR区DO为2.47 mg·L^(−1)时能够在保证出水NH_(3)-N稳定达标的基础上实现更佳的SND效果,可去除3.64 mg·L^(−1)TN。高通量测序结果显示MBBR工艺显著提升了系统的微生物群落丰度和多样性,并且生物膜对于硝化菌属Nitrospira以及反硝化菌属SWB02、Pedomicrobium和Hyphomicrobium均存在更强的富集能力,为MBBR工艺在冬季低温下强大的硝化性能和同步硝化反硝化性能奠定了微生物基础。To verify the treatment performance of MBBR process in engineering,explored the sources of biofilm SND and optimization control methods,analyzed the differences in microbial community composition between biofilm and activated sludge,a CASS WWTP in Southwest China adopted Bardenpho-MBBR for Class IV standard upgrading and renovation was used as an example.The denitrification performance of the renovated system was analyzed using methods such as water quality measurement along biochemical tank,pilot-scale experiments,and literature comparison and discussion.The results showed that,after the renovation,the influent nitrogen load increased about 20%,and the effluent indicators stably reached the standard of Class IV.The maximum nitrification load of MBBR system could reach 0.286 kg·(m^(3)·d)^(−1),and the contribution rate of suspended carrier was 74.83%.Moreover,there was still 56.96%for water quality and 30.57%for water quantity potential improvement of the system.The MBBR area generated nearly 10%TN removal efficiency through the action of suspended carrier SND.By regulating the DO of the MBBR area to 2.47 mg·L^(−1),better SND effect could be achieved while ensuring stable NH_(3)-N effluent standards,and 3.64 mg·L^(−1)TN could be removed.The high-throughput sequencing results showed that the MBBR process significantly improved the abundance and diversity of microbial communities in the system,and the biofilm had a stronger enrichment ability for nitrifying bacteria(Nitrospira),and denitrifying bacteria such as SWB02,Pedomicrobium and Hypomicrobium,laying the microbial foundation for the strong nitrification performance and synchronous nitrification denitrification performance of the MBBR process at low temperatures in winter.

关 键 词：悬浮载体 低温 硝化 抗冲击 同步硝化反硝化 

分 类 号：X703[环境科学与工程—环境工程]