不同碳源异养反硝化动力学研究
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摘要
污水处理过程中,异养反硝化需要一定浓度的有机物来提供电子,促进脱氮反应进行。因此实际应用中,为达到良好的脱氮效果,经常会外加有机物作为碳源。通过外加乙酸钠和甲醇两种碳源,测定了脱氮反应的动力学过程,根据米-门模型确定了动力学参数。通过比较两反应器的优势,为以后在实际应用中根据不同的目的,有选择的选取效率高且经济合理的有机物提供参考。
In the process of wastewater treatment,heterotrophic denitrification requires a certain concentration of organic matter to provide electrons and promote denitrification.Therefore,in practical application,in order to achieve good denitrification effect,organic matter is often added as carbon source.The kinetics of denitrification reaction was determined by adding sodium acetate and methanol as carbon sources.The kinetic parameters were determined according to the Mi-Gate model.By comparing the advantages of the two reactors,it can provide a reference for the selection of efficient and economical organic substances according to different purposes in future practical applications.
In the process of wastewater treatment,heterotrophic denitrification requires a certain concentration of organic matter to provide electrons and promote denitrification.Therefore,in practical application,in order to achieve good denitrification effect,organic matter is often added as carbon source.The kinetics of denitrification reaction was determined by adding sodium acetate and methanol as carbon sources.The kinetic parameters were determined according to the Mi-Gate model.By comparing the advantages of the two reactors,it can provide a reference for the selection of efficient and economical organic substances according to different purposes in future practical applications.
引文
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[2]王淑莹,孙洪伟,杨庆,等.传统生物脱氮反硝化过程的生化机理及动力学[J].应用与环境生物学报,2008,14(5):732-736.
[3]王丽丽,赵林,谭欣,等.不同碳源及其碳氮比对反硝化过程的影响[J].环境保护科学,2004,30(1):15-18.
[4]袁莹,周伟丽,王晖,等.不同电子供体的硫自养反硝化脱氮实验研究[J].环境科学,2013,34(5):1835-1844.
[5]何新慧.双SBR脱氮除磷工艺的启动、特性试验与动力学分析[D].西安:西安建筑科技大学,2006.
[6]Chu L,Wang J.Comparison of polyurethane foam and biodegradable polymer as carriers in moving bed biofilm reactor for treating wastewater with a low C/N ratio[J].Chemosphere,2011,83(1):63-68.
[7]Strong P J,Mcdonald B,Gapes D J,et al.Enhancing denitrification using a carbon supplement generated from the wet oxidation of waste activated sludge[J].Bioresour Technol,2011,102(9):5533-5540.
[8]周莉,汤江武,王新,等.好氧反硝化细菌的筛选鉴定及其反硝化反应条件优化[J].浙江农业学报,2011,23(5):942-947.
[9]肖洋,廖德祥,李小明,等.全程自养脱氮颗粒污泥培养及动力学研究[J].环境科学,2009,30(9):2667-2673.
[10]Kaelin D,Manser R,Rieger L,et al.Extension of ASM3for two-step nitrification and denitrification and its calibration and validation with batch tests and pilot scale data[J].Water Research,2009,43(6):1680-1692.
[11]Lessard P,Beck M B.Dynamic modeling of wastewater treatment processes[J].Environmental Science Technology,1991,25(1):30-39.
[12]陈文倩,周小红,张永明,等.两步脱氮过程的滤池反硝化动力学模型研究[J].给水排水,2013(s1):163-166.