硫铁比对再生水深度脱氮除磷的影响
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摘要
为了考察硫铁比对反硝化脱氮同步除磷效果的影响,进行了不同硫铁比的反硝化脱氮除磷静态实验,并对复合填料系统反硝化脱氮同步除磷作用进行了分析.结果表明,硫铁复合填料的脱氮除磷效果均显著高于单一填料;硫铁比是影响复合填料反硝化脱氮除磷效果的一个关键因素,当硫铁比(体积比)大于等于1∶1时,TN、TP去除率分别达到了85%和97%以上.复合填料脱氮除磷过程均满足二级动力学方程,系统脱氮作用主要依赖于异养反硝化和硫自养反硝化过程,而除磷主要由于海绵铁腐蚀产生的化学除磷作用.
To study the effects of sulfur/sponge iron ratio on denitrification and phosphorus removal,a series of static experiments were conducted using different ratios of sulfur and sponge iron. The results showed that the denitrification and phosphorus removal effect of sulfur/sponge iron composite fillers was significantly higher than that of single filler,and sulfur/sponge iron ratio was one of the key factors influencing nitrogen and phosphorus removal by composite fillers. When the volume ratio was equal to or greater than 1∶ 1,the removal efficiency of TN and TP reached 85% and 97%,respectively. The denitrification and phosphorus removal process of the composite fillers both fitted second-order kinetic equation,the denitrification was dependent on heterotrophic denitrification and sulfur autotrophic denitrification; the phosphorus removal was mainly chemical phosphorus removal caused by sponge iron corrosion.
To study the effects of sulfur/sponge iron ratio on denitrification and phosphorus removal,a series of static experiments were conducted using different ratios of sulfur and sponge iron. The results showed that the denitrification and phosphorus removal effect of sulfur/sponge iron composite fillers was significantly higher than that of single filler,and sulfur/sponge iron ratio was one of the key factors influencing nitrogen and phosphorus removal by composite fillers. When the volume ratio was equal to or greater than 1∶ 1,the removal efficiency of TN and TP reached 85% and 97%,respectively. The denitrification and phosphorus removal process of the composite fillers both fitted second-order kinetic equation,the denitrification was dependent on heterotrophic denitrification and sulfur autotrophic denitrification; the phosphorus removal was mainly chemical phosphorus removal caused by sponge iron corrosion.
引文
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[29]李杰,王亚娥,王志盈,等.海绵铁生物填料对生化处理效果的影响[J].水处理技术,2006,32(12):64-66.
[30]徐丰果,罗建中,凌定勋.废水化学除磷的现状与进展[J].工业水处理,2003,23(5):18-20.
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[32]Godini H,Rezaee A,Khavanin A,et al.Heterotrophic biological denitrification using microbial cellulose as carbon source[J].Journal of Polymers and the Environment,2011,19(1):283-287.
[2]胡洪营,吴光学,吴乾元,等.面向污水资源极尽利用的污水精炼技术与模式探讨[J].环境工程技术学报,2015,5(1):1-6.
[3]Hao R X,Li S M,Li J B,et al.Denitrification of simulated municipal wastewater treatment plant effluent using a threedimensional biofilm-electrode reactor:operating performance and bacterial community[J].Bioresource Technology,2013,143:178-186.
[4]Lv X M,Shao M F,Li J,et al.Nitrate removal with lateral flow Sulphur autotrophic denitrification reactor[J].Environmental Technology,2014,35(21):2692-2697.
[5]孟成成,郝瑞霞,王建超,等.3BER-S耦合脱氮系统运行特性研究[J].中国环境科学,2014,34(11):2817-2823.
[6]郝瑞霞,王建超,孟成成,等.电流对三维电极生物膜耦合硫自养脱氮工艺的影响[J].北京工业大学学报,2015,41(6):919-925.
[7]Batchelor B,Lawrence A W.Autotrophic denitrification using elemental sulfur[J].Journal of the Water Pollution Control Federation,1978,50(8):1986-2001.
[8]Christianson L,Summerfelt S.Fluidization velocity assessment of commercially available sulfur particles for use in autotrophic denitrification biofilters[J].Aquacultural Engineering,2014,60:1-5.
[9]Christianson L,Lepine C,Tsukuda S,et al.Nitrate removal effectiveness of fluidized sulfur-based autotrophic denitrification biofilters for recirculating aquaculture systems[J].Aquacultural Engineering,2015,68:10-18.
[10]Lawrenc A W,Bisngni J J,Batchelor B,et al.Autotrophic denitrification using sulfur electron donors[R].Washington,DC:EPA,1978.78-113.
[11]Till B A,Weathers L J,Alvarez P J J.Fe(0)-supported autotrophic denitrification[J].Environmental Science&Technology,1998,32(5):634-639.
[12]刘俊新,李杰,王亚娥.铁细菌在污水除磷中的应用研究[J].环境科技,2012,25(6):61-65.
[13]李杰,张艳梅,王亚娥.零价铁载体填料主料结合方式对生物强化效果的影响研究[J].水处理技术,2015,41(3):41-44.
[14]Rout P R,Bhunia P,Dash R R.Effective utilization of a sponge iron industry by-product for phosphate removal from aqueous solution:a statistical and kinetic modelling approach[J].Journal of the Taiwan Institute of Chemical Engineers,2015,46,98-108.
[15]Jiang C,Jia L Y,He Y L,et al.Adsorptive removal of phosphorus from aqueous solution using sponge iron and zeolite[J].Journal of Colloid and Interface Science,2013,402:246-252.
[16]匡颖,董启荣,王鹤立.海绵铁与火山岩填料A/O生物滴滤池脱氮除磷的中试研究[J].水处理技术,2012,38(9):50-53.
[17]Choe S,Chang Y Y,Hwang K Y,et al.Kinetics of reductive denitrification by nanoscale zero-valent iron[J].Chemosphere,2000,41(8):1307-1311.
[18]Westerhoff P.Reduction of nitrate,bromate,and chlorate by zero valent iron(Fe-0)[J].Journal of Environmental Engineering,2003,129(1):10-16.
[19]冯艳平,李俊国,毕娜,等.球形海绵铁还原去除水中硝酸盐的静态研究[J].环境科学与技术,2008,31(6):14-18.
[20]刘琰,李剑超,赵英花,等.海绵铁转化地下水中硝酸盐的试验研究[J].环境污染与防治,2012,34(11):20-24.
[21]Shin K H,Cha D K.Microbial reduction of nitrate in the presence of Nanoscale Zero-valent Iron[J].Chemosphere,2008,72(2):257-262.
[22]Kielemoes J,De Boever P,Verstraete W.Influence of denitrification on the corrosion of iron and stainless steel powder[J].Environmental Science&Technology,2000,34(4):663-671.
[23]Peng L,Liu Y W,Gao S H,et al.Evaluation on the nanoscale zero valent iron based microbial denitrification for nitrate removal from groundwater[J].Scientific Reports,2015,5:12331.
[24]Kumaraswamy R,Sjollema K,Kuenen G,et al.Nitratedependent[Fe(Ⅱ)EDTA]2-oxidation by Paracoccus ferrooxidans sp.nov.,isolated from a denitrifying bioreactor[J].Systematic and Applied Microbiology,2006,29(4):276-286.
[25]Straub K L,Benz M,Schink B,et al.Anaerobic,nitratedependent microbial oxidation of ferrous iron[J].Applied and Environmental Microbiology,1996,62(4):1458-1460.
[26]王弘宇,杨开,张倩,等.1株铁基质自养反硝化菌的脱氮特性[J].环境科学,2014,35(4):1437-1442.
[27]吴中琴.硫-铁耦合载体在城市污水深度净化中的应用研究[D].北京:清华大学,2012.
[28]苏晓磊,刘雪洁,梁鹏,等.硫-硫铁复合床深度脱氮除磷[J].化学工业与工程,2015,32(4):63-67.
[29]李杰,王亚娥,王志盈,等.海绵铁生物填料对生化处理效果的影响[J].水处理技术,2006,32(12):64-66.
[30]徐丰果,罗建中,凌定勋.废水化学除磷的现状与进展[J].工业水处理,2003,23(5):18-20.
[31]王润众.新型缓释碳源滤料的制备及其应用研究[D].北京:北京工业大学,2015.26-28.
[32]Godini H,Rezaee A,Khavanin A,et al.Heterotrophic biological denitrification using microbial cellulose as carbon source[J].Journal of Polymers and the Environment,2011,19(1):283-287.