不同曝气量和好氧时间下SPNDPR系统处理低C/N城市污水的脱氮除磷性能
|
摘要
以低C/N城市污水为处理对象,采用延时厌氧(180min)/好氧运行的SBR反应器,通过调控曝气量[单位体积的反应器在单位时间内通过的气体的体积,单位为L·(min·L)~(-1).由0. 125 L·(min·L)~(-1)逐渐降低至0. 025 L·(min·L)~(-1)]和好氧时间(由3 h逐渐延长至6 h),考察了SPNDPR系统的深度脱氮除磷性能.结果表明,当曝气量为0. 025 L·(min·L)~(-1)、好氧时间为6 h时,SPNDPR系统出水NH_4~+-N、NO_2~--N、NO_3~--N和PO_4~(3-)-P浓度分别为0、8. 62、0. 06和0. 03 mg·L~(-1);出水TN浓度约为9. 22 mg·L~(-1),TN去除率高达87. 08%.当曝气量分别由0. 125 L·(min·L)~(-1)降至0. 100 L·(min·L)~(-1)和由0. 100L·(min·L)~(-1)降至0. 075 L·(min·L)~(-1)时,系统硝化速率均能恢复并稳定维持在0. 16 mg·(L·min)~(-1)左右.但曝气量继续降至0. 050 L·(min·L)~(-1)和0. 025 L·(min·L)~(-1)后,硝化速率分别降至0. 09 mg·(L·min)~(-1)和0. 06 mg·(L·min)~(-1)左右.随着曝气量的降低[由0. 125 L·(min·L)~(-1)依次降至0. 100、0. 075、0. 050、0. 025 L·(min·L)~(-1)]和好氧时间的延长(由3 h延长至6h),SPND脱氮性能逐渐增强,SND率由19. 57%升高至72. 11%,TN去除率逐渐升高(由62. 82%升高至87. 08%).降低曝气量和延长好氧时间后的SPNDPR系统,强化了厌氧段内碳源贮存与好氧段好氧吸磷、反硝化除磷、短程硝化、内源反硝化等过程的进行,实现了低C/N城市污水的深度脱氮除磷.
An anaerobic( 180 min)/aerobic operated sequencing batch reactor( SBR) fed with urban sewage was optimized by regulating the aeration quantity to investigate the deep-level nitrogen( N) and phosphorus( P) removal. The amount of aeration was regulated by adjusting the volume of gas per unit volume of reactor passed in unit time,when the unit is L·( min·L)~(-1),from 0. 125 L·( min·L)~(-1) gradually to 0. 025 L·( min·L)~(-1),and aerobic times from 3 h to 6 h. The experimental results show that the effluent NH_4~+-N,NO_2~--N,NO_3~--N,and PO_4~(3-)-P concentrations of the optimized SPNDPR system were 0,8. 62,0. 06,and 0. 03 mg·L~(-1).The effluent TN concentration was about 9. 22 mg·L~(-1),and the TN removal efficiency was up to 87. 08%. When the aeration quantity was decreased from 0. 125 L·( min·L)~(-1) to 0. 100 L·( min·L)~(-1); then decreased to 0. 075 L·( min·L)~(-1),the nitrification rate of the system recovered and stabilized at 0. 16 mg·( L·min)~(-1). However,when the aeration quantity continuously decreased to 0. 050 L·( min·L)~(-1) and then to 0. 025 L·( min·L)~(-1),the nitrification rate decreased to 0. 09 mg·( L·min)~(-1) and 0. 06 mg·( L·min)~(-1).With reduction of the aeration quantity [from 0. 125 L·( min·L)~(-1) to 0. 100,0. 075,0. 050 and 0. 025 L·( min·L)~(-1)]and extension of aerobic time( from 3 h to 6 h),the TN removal efficiency increased gradually from 62. 82% to 87. 08%,and the SND efficiency increased from 19. 57% to 72. 11%. It was proven that reducing the aeration quantity can enhance the SPND function and deep denitrification by the system was realized. By enhancing the anaerobic intracellular carbon storage and aerobic phosphorus uptake,denitrifying phosphorus removal,partial nitrification,and endogenous nitrification were achieved. The SPNDPR system,after reducing aeration and prolonging aerobic time,was able to realize deep-level denitrification and dephosphorization using low C/N urban sewage.
An anaerobic( 180 min)/aerobic operated sequencing batch reactor( SBR) fed with urban sewage was optimized by regulating the aeration quantity to investigate the deep-level nitrogen( N) and phosphorus( P) removal. The amount of aeration was regulated by adjusting the volume of gas per unit volume of reactor passed in unit time,when the unit is L·( min·L)~(-1),from 0. 125 L·( min·L)~(-1) gradually to 0. 025 L·( min·L)~(-1),and aerobic times from 3 h to 6 h. The experimental results show that the effluent NH_4~+-N,NO_2~--N,NO_3~--N,and PO_4~(3-)-P concentrations of the optimized SPNDPR system were 0,8. 62,0. 06,and 0. 03 mg·L~(-1).The effluent TN concentration was about 9. 22 mg·L~(-1),and the TN removal efficiency was up to 87. 08%. When the aeration quantity was decreased from 0. 125 L·( min·L)~(-1) to 0. 100 L·( min·L)~(-1); then decreased to 0. 075 L·( min·L)~(-1),the nitrification rate of the system recovered and stabilized at 0. 16 mg·( L·min)~(-1). However,when the aeration quantity continuously decreased to 0. 050 L·( min·L)~(-1) and then to 0. 025 L·( min·L)~(-1),the nitrification rate decreased to 0. 09 mg·( L·min)~(-1) and 0. 06 mg·( L·min)~(-1).With reduction of the aeration quantity [from 0. 125 L·( min·L)~(-1) to 0. 100,0. 075,0. 050 and 0. 025 L·( min·L)~(-1)]and extension of aerobic time( from 3 h to 6 h),the TN removal efficiency increased gradually from 62. 82% to 87. 08%,and the SND efficiency increased from 19. 57% to 72. 11%. It was proven that reducing the aeration quantity can enhance the SPND function and deep denitrification by the system was realized. By enhancing the anaerobic intracellular carbon storage and aerobic phosphorus uptake,denitrifying phosphorus removal,partial nitrification,and endogenous nitrification were achieved. The SPNDPR system,after reducing aeration and prolonging aerobic time,was able to realize deep-level denitrification and dephosphorization using low C/N urban sewage.
引文
[1]Fux C,Boehler M,Huber P,et al.Biological treatment of ammonium-rich wastewater by partial nitritation and subsequent anaerobic ammonium oxidation(anammox)in a pilot plant[J].Journal of Biotechnology,2002,99(3):295-306.
[2]张小玲.短程硝化-反硝化生物脱氮与反硝化聚磷基础研究[D].西安:西安建筑科技大学,2004.
[3]Virdis B,Read S T,Rabaey K,et al.Biofilm stratification during simultaneous nitrification and denitrification(SND)at a biocathode[J].Bioresource Technology,2011,102(1):334-341.
[4]马放,李平,张晓琦,等.SBR反应器同步硝化反硝化影响因素及其特性[J].哈尔滨工业大学学报,2011,43(8):55-60.Ma F,Li P,Zhang X Q,et al.The influencing factors and the characteristics of simultaneous nitrification-denitrification in SBR[J].Journal of Harbin Institute of Technology,2011,43(8):55-60.
[5]彭赵旭,彭永臻,左金龙.同步硝化反硝化的影响因素研究[J].给水排水,2009,35(5):167-171.Peng Z X,Peng Y Z,Zuo J L.Study of influence factors on simultaneous nitrification and denitrification[J].Water Supply and Drainage,2009,35(5):167-171.
[6]Wang X X,Wang S Y,Xue T L,et al.Treating low carbon/nitrogen(C/N)wastewater in simultaneous nitrificationendogenous denitrification and phosphorous removal(SNDPR)systems by strengthening anaerobic intracellular carbon storage[J].Water Research,2015,77:191-200.
[7]Fu Z M,Yang F L,An Y Y,et al.Simultaneous nitrification and denitrification coupled with phosphorus removal in an modified anoxic/oxic-membrane bioreactor(A/O-MBR)[J].Biochemical Engineering Journal,2008,43(2):191-196.
[8]刘春,年永嘉,张静,等.微气泡曝气生物膜反应器同步硝化反硝化研究[J].环境科学,2014,35(6):2230-2235.Liu C,Nian Y J,Zhang J,et al.Simultaneous nitrification and denitrification in a microbubble-aerated biofilm reactor[J].Environmental Science,2014,35(6):2230-2235.
[9]Münch E V,Lant P,Keller J.Simultaneous nitrification and denitrification in bench-scale sequencing batch reactors[J].Water Research,1996,30(2):277-284.
[10]吕宏德,张树军,王伟,等.A/O短程硝化反应器处理高浓氨氮废水的SND[J].中国给水排水,2008,24(13):89-91,95.LüH D,Zhang S J,Wang W,et al.Study on SND in A/Oshortcut nitrification reactor for treatment of high-concentration ammonia nitrogen wastewater[J].China Water&Wastewater,2008,24(13):89-91,95.
[11]苗志加,彭永臻,薛桂松,等.强化生物除磷工艺富集聚磷菌及其微生物菌群分析[J].北京工业大学学报,2013,39(5):743-748.Mao Z J,Peng Y Z,Xue G S,et al.Enrichment and analysis of the population of phosphate accumulating organisms in enhanced biological phosphorus removal system[J].Journal of Beijing University of Technology,2013,39(5):743-748.
[12]Zengin G E,Artan N,Orhon D,et al.Population dynamics in a sequencing batch reactor fed with glucose and operated for enhanced biological phosphorus removal[J].Bioresource Technology,2010,101(11):4000-4005.
[13]Li N,Ren N Q,Wang X H,et al.Effect of temperature on intracellular phosphorus absorption and extra-cellular phosphorus removal in EBPR process[J].Bioresource Technology,2010,101(15):6265-6268.
[14]Wang F,Lu S,Wei Y J,et al.Characteristics of aerobic granule and nitrogen and phosphorus removal in a SBR[J].Journal of Hazardous Materials,2009,164(2-3):1223-1227.
[15]Ma Y,Peng Y Z,Wang X L.Improving nutrient removal of the AAO process by an influent bypass flow by denitrifying phosphorus removal[J].Desalination,2009,246(1-3):534-544.
[16]戴娴.富集聚磷菌的EBPR耦合同步硝化反硝化系统脱氮除磷性能研究[D].北京:北京工业大学,2016.
[17]戴娴,王晓霞,彭永臻,等.进水C/N对富集聚磷菌的SNDPR系统脱氮除磷的影响[J].中国环境科学,2015,35(9):2636-2643.Dai X,Wang X X,Peng Y Z,et al.Effect of influent C/N ratio on simultaneous nitrification-denitrification and phosphorus removal(SNDPR)enriched with phosphorus accumulating organisms(PAOs)[J].China Environmental Science,2015,35(9):2636-2643.
[18]张静,陈洪斌.低碳源污水的脱氮除磷技术研究进展[J].水处理技术,2014,40(1):1-6,15.
[19]刘钢,谌建宇,黄荣新,等.新型后置反硝化工艺处理低C/N(C/P)比污水脱氮除磷性能研究[J].环境科学学报,2013,33(11):2979-2986.Liu G,Chen J Y,Huang R X,et al.Nutrient removal performance of a novel post-anoxic process in treating wastewater with low C/N(C/P)ratios[J].Acta Scientiae Circumstantiae,2013,33(11):2979-2986.
[20]温沁雪,唐致文,陈志强,等.A2O工艺好氧末段溶解氧变化对脱氮除磷影响[J].环境工程学报,2011,5(5):1041-1046.Wen Q X,Tang Z W,Chen Z Q,et al.Effects of dissolved oxygen concentration at the end of aerobic stage in A2O on nitrogen and phosphorus removal[J].Chinese Journal of Environmental Engineering,2011,5(5):1041-1046.
[21]操家顺,陈洵,方芳.低溶解氧对改良A/A/O工艺脱氮除磷的影响[J].净水技术,2013,32(6):40-44,63.Cao J S,Chen X,Fang F.Effect of low concentration of dissolved oxygen on nitrogen and phosphorus removal with modified A/A/O processes[J].Water Purification Technology,2013,32(6):40-44,63.
[22]王建龙,彭永臻,王淑莹.污泥龄对A2/O工艺脱氮除磷效果的影响[J].环境工程,2007,25(1):16-18.
[23]徐伟锋,顾国维,陈银广.SRT对A2/O工艺脱氮除磷的影响[J].水处理技术,2007,33(9):68-71.
[24]许小平,陶晓武,杜敬,等.污泥龄对A2/O工艺脱氮除磷的影响分析[J].中国给水排水,2013,29(21):69-71.Xu X P,Tao X W,Du J,et al.Effect of SRT on nitrogen and phosphorus removal in A2/O process[J].China Water&Wastewater,2013,29(21):69-71.
[25]许劲,孙俊贻.生物除磷脱氮系统工程设计中的污泥龄[J].重庆建筑大学学报,2005,27(5):86-89.Xu J,Sun J Y.Sludge retention time in design of biological phosphorus and nitrogen removal system[J].Journal of Chongqing Architecture University,2005,27(5):86-89.
[26]Gieseke A,Arnz P,Amann R,et al.Simultaneous P and Nremoval in a sequencing batch biofilm reactor:insights from reactor-and microscale investigations[J].Water Research,2002,36(2):501-509.
[27]戴娴,彭永臻,王晓霞,等.不同厌氧时间对富集聚磷菌的SNDPR系统处理性能的影响[J].中国环境科学,2016,36(1):92-99.Dai X,Peng Y Z,Wang X X,et al.Effect of different anaerobic time on the nutrient removal in simultaneous nitrificationdenitrification and phosphorus removal(SNDPR)systems enriched with phosphorus accumulating organisms[J].China Environmental Science,2016,36(1):92-99.
[28]于德爽,袁梦飞,王晓霞,等.厌氧/好氧SPNDPR系统实现低C/N城市污水同步脱氮除磷的优化运行[J].环境科学,2018,39(11):5065-5073.Yu D S,Yuan M F,Wang X X,et al.Simultaneous nitrogen and phosphorus removal characteristics of an anaerobic/aerobic operated SPNDPR system treating low C/N urban sewage[J].Environmental Science,2018,39(11):5065-5073.
[2]张小玲.短程硝化-反硝化生物脱氮与反硝化聚磷基础研究[D].西安:西安建筑科技大学,2004.
[3]Virdis B,Read S T,Rabaey K,et al.Biofilm stratification during simultaneous nitrification and denitrification(SND)at a biocathode[J].Bioresource Technology,2011,102(1):334-341.
[4]马放,李平,张晓琦,等.SBR反应器同步硝化反硝化影响因素及其特性[J].哈尔滨工业大学学报,2011,43(8):55-60.Ma F,Li P,Zhang X Q,et al.The influencing factors and the characteristics of simultaneous nitrification-denitrification in SBR[J].Journal of Harbin Institute of Technology,2011,43(8):55-60.
[5]彭赵旭,彭永臻,左金龙.同步硝化反硝化的影响因素研究[J].给水排水,2009,35(5):167-171.Peng Z X,Peng Y Z,Zuo J L.Study of influence factors on simultaneous nitrification and denitrification[J].Water Supply and Drainage,2009,35(5):167-171.
[6]Wang X X,Wang S Y,Xue T L,et al.Treating low carbon/nitrogen(C/N)wastewater in simultaneous nitrificationendogenous denitrification and phosphorous removal(SNDPR)systems by strengthening anaerobic intracellular carbon storage[J].Water Research,2015,77:191-200.
[7]Fu Z M,Yang F L,An Y Y,et al.Simultaneous nitrification and denitrification coupled with phosphorus removal in an modified anoxic/oxic-membrane bioreactor(A/O-MBR)[J].Biochemical Engineering Journal,2008,43(2):191-196.
[8]刘春,年永嘉,张静,等.微气泡曝气生物膜反应器同步硝化反硝化研究[J].环境科学,2014,35(6):2230-2235.Liu C,Nian Y J,Zhang J,et al.Simultaneous nitrification and denitrification in a microbubble-aerated biofilm reactor[J].Environmental Science,2014,35(6):2230-2235.
[9]Münch E V,Lant P,Keller J.Simultaneous nitrification and denitrification in bench-scale sequencing batch reactors[J].Water Research,1996,30(2):277-284.
[10]吕宏德,张树军,王伟,等.A/O短程硝化反应器处理高浓氨氮废水的SND[J].中国给水排水,2008,24(13):89-91,95.LüH D,Zhang S J,Wang W,et al.Study on SND in A/Oshortcut nitrification reactor for treatment of high-concentration ammonia nitrogen wastewater[J].China Water&Wastewater,2008,24(13):89-91,95.
[11]苗志加,彭永臻,薛桂松,等.强化生物除磷工艺富集聚磷菌及其微生物菌群分析[J].北京工业大学学报,2013,39(5):743-748.Mao Z J,Peng Y Z,Xue G S,et al.Enrichment and analysis of the population of phosphate accumulating organisms in enhanced biological phosphorus removal system[J].Journal of Beijing University of Technology,2013,39(5):743-748.
[12]Zengin G E,Artan N,Orhon D,et al.Population dynamics in a sequencing batch reactor fed with glucose and operated for enhanced biological phosphorus removal[J].Bioresource Technology,2010,101(11):4000-4005.
[13]Li N,Ren N Q,Wang X H,et al.Effect of temperature on intracellular phosphorus absorption and extra-cellular phosphorus removal in EBPR process[J].Bioresource Technology,2010,101(15):6265-6268.
[14]Wang F,Lu S,Wei Y J,et al.Characteristics of aerobic granule and nitrogen and phosphorus removal in a SBR[J].Journal of Hazardous Materials,2009,164(2-3):1223-1227.
[15]Ma Y,Peng Y Z,Wang X L.Improving nutrient removal of the AAO process by an influent bypass flow by denitrifying phosphorus removal[J].Desalination,2009,246(1-3):534-544.
[16]戴娴.富集聚磷菌的EBPR耦合同步硝化反硝化系统脱氮除磷性能研究[D].北京:北京工业大学,2016.
[17]戴娴,王晓霞,彭永臻,等.进水C/N对富集聚磷菌的SNDPR系统脱氮除磷的影响[J].中国环境科学,2015,35(9):2636-2643.Dai X,Wang X X,Peng Y Z,et al.Effect of influent C/N ratio on simultaneous nitrification-denitrification and phosphorus removal(SNDPR)enriched with phosphorus accumulating organisms(PAOs)[J].China Environmental Science,2015,35(9):2636-2643.
[18]张静,陈洪斌.低碳源污水的脱氮除磷技术研究进展[J].水处理技术,2014,40(1):1-6,15.
[19]刘钢,谌建宇,黄荣新,等.新型后置反硝化工艺处理低C/N(C/P)比污水脱氮除磷性能研究[J].环境科学学报,2013,33(11):2979-2986.Liu G,Chen J Y,Huang R X,et al.Nutrient removal performance of a novel post-anoxic process in treating wastewater with low C/N(C/P)ratios[J].Acta Scientiae Circumstantiae,2013,33(11):2979-2986.
[20]温沁雪,唐致文,陈志强,等.A2O工艺好氧末段溶解氧变化对脱氮除磷影响[J].环境工程学报,2011,5(5):1041-1046.Wen Q X,Tang Z W,Chen Z Q,et al.Effects of dissolved oxygen concentration at the end of aerobic stage in A2O on nitrogen and phosphorus removal[J].Chinese Journal of Environmental Engineering,2011,5(5):1041-1046.
[21]操家顺,陈洵,方芳.低溶解氧对改良A/A/O工艺脱氮除磷的影响[J].净水技术,2013,32(6):40-44,63.Cao J S,Chen X,Fang F.Effect of low concentration of dissolved oxygen on nitrogen and phosphorus removal with modified A/A/O processes[J].Water Purification Technology,2013,32(6):40-44,63.
[22]王建龙,彭永臻,王淑莹.污泥龄对A2/O工艺脱氮除磷效果的影响[J].环境工程,2007,25(1):16-18.
[23]徐伟锋,顾国维,陈银广.SRT对A2/O工艺脱氮除磷的影响[J].水处理技术,2007,33(9):68-71.
[24]许小平,陶晓武,杜敬,等.污泥龄对A2/O工艺脱氮除磷的影响分析[J].中国给水排水,2013,29(21):69-71.Xu X P,Tao X W,Du J,et al.Effect of SRT on nitrogen and phosphorus removal in A2/O process[J].China Water&Wastewater,2013,29(21):69-71.
[25]许劲,孙俊贻.生物除磷脱氮系统工程设计中的污泥龄[J].重庆建筑大学学报,2005,27(5):86-89.Xu J,Sun J Y.Sludge retention time in design of biological phosphorus and nitrogen removal system[J].Journal of Chongqing Architecture University,2005,27(5):86-89.
[26]Gieseke A,Arnz P,Amann R,et al.Simultaneous P and Nremoval in a sequencing batch biofilm reactor:insights from reactor-and microscale investigations[J].Water Research,2002,36(2):501-509.
[27]戴娴,彭永臻,王晓霞,等.不同厌氧时间对富集聚磷菌的SNDPR系统处理性能的影响[J].中国环境科学,2016,36(1):92-99.Dai X,Peng Y Z,Wang X X,et al.Effect of different anaerobic time on the nutrient removal in simultaneous nitrificationdenitrification and phosphorus removal(SNDPR)systems enriched with phosphorus accumulating organisms[J].China Environmental Science,2016,36(1):92-99.
[28]于德爽,袁梦飞,王晓霞,等.厌氧/好氧SPNDPR系统实现低C/N城市污水同步脱氮除磷的优化运行[J].环境科学,2018,39(11):5065-5073.Yu D S,Yuan M F,Wang X X,et al.Simultaneous nitrogen and phosphorus removal characteristics of an anaerobic/aerobic operated SPNDPR system treating low C/N urban sewage[J].Environmental Science,2018,39(11):5065-5073.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |