The stability of performance of anaerobic ammonium oxidation (ANAMMOX) reactors was studied and the indices of performance stability were compared.The results showed that under different types of shock load, the react...The stability of performance of anaerobic ammonium oxidation (ANAMMOX) reactors was studied and the indices of performance stability were compared.The results showed that under different types of shock load, the reactors with different configurations displayed different stability.The biofilm reactor stood first in stability towards substrate shock load, followed by anaerobic sequencing batch reactor (SBR) and the granular sludge bed.And the biofilm reactor took the first place towards hydraulic shock load, followed by the granular sludge bed and SBR.The three ANAMMOX reactors were more tolerant to hydraulic shock load than to substrate shock load.When different kinds of stability assessment indices(i.e., sensitivity ratio, mean variance ratio and derivative regression function) were used, inconsistent assessment conclusions were reached.It was suggested that the mean deviation ratio and derivative regression function were more effective and universal.展开更多
针对A^2/O+移动床生物膜反应器(A^2/O+MBBR)双污泥系统,以低碳氮比(C/N)生活污水为处理对象,考察启动过程的污泥特性和反硝化除磷特性,基于脱氮除磷的代谢机理建立系统的快速启动策略。研究结果表明:启动过程历时21 d完成,污泥结构稳定...针对A^2/O+移动床生物膜反应器(A^2/O+MBBR)双污泥系统,以低碳氮比(C/N)生活污水为处理对象,考察启动过程的污泥特性和反硝化除磷特性,基于脱氮除磷的代谢机理建立系统的快速启动策略。研究结果表明:启动过程历时21 d完成,污泥结构稳定且具有较好的污泥沉降性和生物活性;平均重量污泥浓度从1 189 mg/L增加到1 760 mg/L,SVI值在95 m L/g MLSS以下,反硝化聚磷菌(DNPAOs)占聚磷菌(PAOs)的百分比从接种污泥时的10.87%增加到25.46%。启动过程,COD的去除效果基本稳定,A^2/O反应器可实现碳源的高效利用;硝化过程为反硝化除磷提供电子受体,TN的高效去除需要建立在NH+4-N氧化完全的基础上;PO_4^(3-)-P的去除特性与NO_3^--N的变化密切相关,除了缺氧区的同步脱氮除磷,好氧吸磷对稳定PO_4^(3-)-P出水浓度发挥着重要作用。在平均进水碳氮比为3.44的运行条件下,A^2/O+MBBR系统可实现有机物、氮、磷等污染物的同步高效去除,稳定运行阶段出水COD、NH_4^+-N、TN和PO_4^(3-)-P浓度分别为38.5、1.15、14.2、0.15 mg/L,COD、TN和PO_4^(3-)-P去除率分别为82.23%,74.72%和96.80%。DO、pH和ORP等实时控制参数的变化规律与脱氮除磷存在定量关系,稳定运行阶段厌氧区ORP为-398^-336 m V,反硝化过程pH值增幅0.55,ORP增加到-300^-175 m V,硝化过程pH值降低0.37。ORP、pH值可以直观地反映反硝化过程,pH值能够灵敏地反映硝化进程,实时控制参数的联合调控有利于促进系统的快速启动和稳定运行。展开更多
文摘The stability of performance of anaerobic ammonium oxidation (ANAMMOX) reactors was studied and the indices of performance stability were compared.The results showed that under different types of shock load, the reactors with different configurations displayed different stability.The biofilm reactor stood first in stability towards substrate shock load, followed by anaerobic sequencing batch reactor (SBR) and the granular sludge bed.And the biofilm reactor took the first place towards hydraulic shock load, followed by the granular sludge bed and SBR.The three ANAMMOX reactors were more tolerant to hydraulic shock load than to substrate shock load.When different kinds of stability assessment indices(i.e., sensitivity ratio, mean variance ratio and derivative regression function) were used, inconsistent assessment conclusions were reached.It was suggested that the mean deviation ratio and derivative regression function were more effective and universal.
文摘针对A^2/O+移动床生物膜反应器(A^2/O+MBBR)双污泥系统,以低碳氮比(C/N)生活污水为处理对象,考察启动过程的污泥特性和反硝化除磷特性,基于脱氮除磷的代谢机理建立系统的快速启动策略。研究结果表明:启动过程历时21 d完成,污泥结构稳定且具有较好的污泥沉降性和生物活性;平均重量污泥浓度从1 189 mg/L增加到1 760 mg/L,SVI值在95 m L/g MLSS以下,反硝化聚磷菌(DNPAOs)占聚磷菌(PAOs)的百分比从接种污泥时的10.87%增加到25.46%。启动过程,COD的去除效果基本稳定,A^2/O反应器可实现碳源的高效利用;硝化过程为反硝化除磷提供电子受体,TN的高效去除需要建立在NH+4-N氧化完全的基础上;PO_4^(3-)-P的去除特性与NO_3^--N的变化密切相关,除了缺氧区的同步脱氮除磷,好氧吸磷对稳定PO_4^(3-)-P出水浓度发挥着重要作用。在平均进水碳氮比为3.44的运行条件下,A^2/O+MBBR系统可实现有机物、氮、磷等污染物的同步高效去除,稳定运行阶段出水COD、NH_4^+-N、TN和PO_4^(3-)-P浓度分别为38.5、1.15、14.2、0.15 mg/L,COD、TN和PO_4^(3-)-P去除率分别为82.23%,74.72%和96.80%。DO、pH和ORP等实时控制参数的变化规律与脱氮除磷存在定量关系,稳定运行阶段厌氧区ORP为-398^-336 m V,反硝化过程pH值增幅0.55,ORP增加到-300^-175 m V,硝化过程pH值降低0.37。ORP、pH值可以直观地反映反硝化过程,pH值能够灵敏地反映硝化进程,实时控制参数的联合调控有利于促进系统的快速启动和稳定运行。
