Three parallel anaerobic-anoxic/anaerobic-aerobic （AN/AO） processes were developed to enrich denitrifying phosphorus removal bacteria （DPB） for low strength wastewater treatment. The main body of the parallel AN/A...Three parallel anaerobic-anoxic/anaerobic-aerobic （AN/AO） processes were developed to enrich denitrifying phosphorus removal bacteria （DPB） for low strength wastewater treatment. The main body of the parallel AN/AO process consists of an AN （anaerobic-anoxic） process and an AO （anaerobic-aerobic） process. In the AO process, the common phosphorus accumulating organisms （PAOs） was dominate, while in the AN process, DPB was dominate, The volume of anaerobic zone（Vana）：anoxie zone（Vano） ： aerobic zone （Vaer） for the parallel AN/AO process is 1：1：1 in contrast with a Vana：Vaer and Vano：Vaer of 1：2 and 1：4 for a traditional biological nutrient removal process （BNR）. Process 3 excels in the 3 processes on the basis of COD, TN and TP removal. For 4 month operation, the effluent COD concentration of process 3 did not exceed 60 mg/L; the effluent TN concentration of process 3 was lower than 15 mg/L; and the effluent TP concentration of process 3 was lower than 1 mg/L.展开更多
【目的】在减污降碳背景下,为充分挖掘多段多级缺氧/好氧(AO)工艺处理潜能,实现污水厂节能降耗与碳减排目标,探讨其低碳设计优化策略。【方法】结合碳排放分析,对案例污水多段多级AO工艺进行研究,从低碳减排运行及效能提升角度,分析探...【目的】在减污降碳背景下,为充分挖掘多段多级缺氧/好氧(AO)工艺处理潜能,实现污水厂节能降耗与碳减排目标,探讨其低碳设计优化策略。【方法】结合碳排放分析,对案例污水多段多级AO工艺进行研究,从低碳减排运行及效能提升角度,分析探讨曝气系统、进水流量分配、配水方式、池型结构等方面的设计优化策略。【结果】案例污水厂多段多级AO工艺段碳排放强度为0.39 kg CO_(2)-eq/m^(3),占全厂污水处理碳排放总量的55.84%;好氧区曝气系统宜采用渐减布置,并设置脱气变形区,选择合适的多点进水配水控制方式,优化进水流量分配,重视池型与推流器、搅拌器的选型以及各区域联通洞口的开法,保证生物池流态良好;应用精确曝气系统、精确碳源投加控制系统,可使该工艺碳排放强度降低至0.35 kg CO_(2)-eq/m^(3),总体实现碳减排10.3%。【结论】上述设计优化建议能有效降低多段多级AO工艺碳排放强度,对污水厂低碳运行意义重大,可为同类工程设计提供借鉴,助力污水厂更好地衔接生产运行,实现节能降碳目标。展开更多
基金The Shuguang Program of Shanghai Education Committee (No. 03SG20)
文摘Three parallel anaerobic-anoxic/anaerobic-aerobic （AN/AO） processes were developed to enrich denitrifying phosphorus removal bacteria （DPB） for low strength wastewater treatment. The main body of the parallel AN/AO process consists of an AN （anaerobic-anoxic） process and an AO （anaerobic-aerobic） process. In the AO process, the common phosphorus accumulating organisms （PAOs） was dominate, while in the AN process, DPB was dominate, The volume of anaerobic zone（Vana）：anoxie zone（Vano） ： aerobic zone （Vaer） for the parallel AN/AO process is 1：1：1 in contrast with a Vana：Vaer and Vano：Vaer of 1：2 and 1：4 for a traditional biological nutrient removal process （BNR）. Process 3 excels in the 3 processes on the basis of COD, TN and TP removal. For 4 month operation, the effluent COD concentration of process 3 did not exceed 60 mg/L; the effluent TN concentration of process 3 was lower than 15 mg/L; and the effluent TP concentration of process 3 was lower than 1 mg/L.
文摘【目的】在减污降碳背景下,为充分挖掘多段多级缺氧/好氧(AO)工艺处理潜能,实现污水厂节能降耗与碳减排目标,探讨其低碳设计优化策略。【方法】结合碳排放分析,对案例污水多段多级AO工艺进行研究,从低碳减排运行及效能提升角度,分析探讨曝气系统、进水流量分配、配水方式、池型结构等方面的设计优化策略。【结果】案例污水厂多段多级AO工艺段碳排放强度为0.39 kg CO_(2)-eq/m^(3),占全厂污水处理碳排放总量的55.84%;好氧区曝气系统宜采用渐减布置,并设置脱气变形区,选择合适的多点进水配水控制方式,优化进水流量分配,重视池型与推流器、搅拌器的选型以及各区域联通洞口的开法,保证生物池流态良好;应用精确曝气系统、精确碳源投加控制系统,可使该工艺碳排放强度降低至0.35 kg CO_(2)-eq/m^(3),总体实现碳减排10.3%。【结论】上述设计优化建议能有效降低多段多级AO工艺碳排放强度,对污水厂低碳运行意义重大,可为同类工程设计提供借鉴,助力污水厂更好地衔接生产运行,实现节能降碳目标。
