偶氮染料废水厌氧生物脱色强化
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摘要
针对偶氮染料废水的生物降解难题,通过对比投加不同浓度的电子供体(葡萄糖)和氧化还原介体(RM)蒽醌-2,6-二磺酸钠盐和活性炭对偶氮染料的厌氧生物脱色果的影响,探究增强偶氮染料厌氧生物脱色的条件。结果表明:投加电子供体或RM均可有效强化偶氮染料废水厌氧生物脱色;投加300 mg/L葡萄糖时脱色率可高达53.35%,投加200 mmol/L蒽醌-2,6-二磺酸钠盐时脱色率为34.59%,与投加0.6 g/L活性炭的脱色率(35.26%)相当;投加葡萄糖0~24 h的脱色速率最快为1.47%/h,36 h脱色率接近最大值为46.49%;投加蒽醌-2,6-二磺酸钠盐时0~12 h的脱色速率最快为1.03%/h,60 h脱色率接近最大值为33.30%;投加活性炭时0~30 h的脱色速率最快为0.79%/h,60 h脱色率接近最大值为33.65%。
Aiming at the difficult biodegradation of azo dyes wastewater,comparative experimental study on anaerobic biological decoloration of azo dyes was carried out by comparing the influences of adding different concentrations of electron donors( glucose) and redox mediators( RM) anthraquinone-2,6-disulphonic acid disodium salt and activated carbon on the anaerobic biological decoloration of azo dyes so as to explore conditions enhancing the anaerobic decoloration of azo dyes. The results indicate that increasing concentrations of the electron donor or the RM can effectively enhance the anaerobic decoloration of azo dyes wastewater. The decoloration rates up to 53. 35%,34. 59% and 35. 26% can be achieved with dosage of glucose,anthraquinone-2,6-disulphonic acid disodium salt and activated carbon for 300 mg/L,200 mmol/L and 0. 6 g/L,respectively. When the glucose is added,the decoloration rate is 1. 47%/h at 0-24 h,and the decoloration efficiency at 36 h is 46. 49%. When the anthraquinone-2,6-disulphonic acid disodium salt is added,the decoloration rate is 1. 03%/h at 0-12 h,and the decoloration efficiency at 60 h is 33. 30%. When the activated carbon is added,the decoloration rate is0. 79%/h at 0-30 h,and the decoloration efficiency at 60 h is 33. 65%.
Aiming at the difficult biodegradation of azo dyes wastewater,comparative experimental study on anaerobic biological decoloration of azo dyes was carried out by comparing the influences of adding different concentrations of electron donors( glucose) and redox mediators( RM) anthraquinone-2,6-disulphonic acid disodium salt and activated carbon on the anaerobic biological decoloration of azo dyes so as to explore conditions enhancing the anaerobic decoloration of azo dyes. The results indicate that increasing concentrations of the electron donor or the RM can effectively enhance the anaerobic decoloration of azo dyes wastewater. The decoloration rates up to 53. 35%,34. 59% and 35. 26% can be achieved with dosage of glucose,anthraquinone-2,6-disulphonic acid disodium salt and activated carbon for 300 mg/L,200 mmol/L and 0. 6 g/L,respectively. When the glucose is added,the decoloration rate is 1. 47%/h at 0-24 h,and the decoloration efficiency at 36 h is 46. 49%. When the anthraquinone-2,6-disulphonic acid disodium salt is added,the decoloration rate is 1. 03%/h at 0-12 h,and the decoloration efficiency at 60 h is 33. 30%. When the activated carbon is added,the decoloration rate is0. 79%/h at 0-30 h,and the decoloration efficiency at 60 h is 33. 65%.
引文
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[15]HONG Y G,GUO J,XU Z C,et al.Humic substances act as electron acceptor and redox mediator for microbial dissimilatory azoreduction by Shewanella decolorationis S12[J].Journal of Microbiology and Biotechnology,2007,17(3):428-437.
[16]GARC A O,CAMARERO S,COLOM J F,et al.Optimization of a laccase-mediator stage for TCF bleaching of flax pulp[J].Holzforschung,2003,57(5):513-519.
[17]VAN D Z F P,BISSCHOPS I A E,LETTINGA G,et al.Activated carbon as an electron acceptor and redox mediator during the anaerobic biotransformation of azo dyes[J].Environmental Science&Technology,2003,37(2):402-408.
[2]余燚,郑平,金仁村,等.印染废水生物处理技术进展[J].化工进展,2008,27(11):1724-1727.YU Yi,ZHENG Ping,JIN Rencun,et al.Biotechnology for dyeing and printing wastewater treatment[J].Chemical Industry and Engineering Progress,2008,27(11):1724-1727.
[3]谢学辉,朱玲玉,刘娜,等.印染废水处理功能菌研究进展[J].化工进展,2015,34(2):554-560.XIE Xuehui,ZHU Lingyu,LIU Na,et al.Progress of functional bacteria in printing and dyeing wastewater:biological treatment[J].Chemical Industry and Engineering Progress,2015,34(2):554-560.
[4]贾艳萍,姜成,郭泽辉,等.印染废水深度处理及回用研究进展[J].纺织学报,2017,38(8):172-180.JIA Yanping,JIANG Cheng,GUO Zehui,et al.Research progress on deep treatment and recycling of dye wastewater[J].Journal of Textile Research,2017,38(8):172-180.
[5]MARTINS L R,BAETA B E L,GURGEL L V A,et al.Application of cellulose-immobilized riboflavin as a redox mediator for anaerobic degradation of a model azo dye Remazol Golden Yellow RNL[J].Industrial Crops and Products,2015,65:454-462.
[6]刘桂萍,王鲁萍,王瑾,等.开放体系下霉菌7对偶氮染料的吸附降解[J].纺织学报,2012,33(3):67-73.LIU Guiping,WANG Luping,WANG Jin,et al.Absorption and degradation of azo-dye by Mold 7 under open system[J].Journal of Textile Research,2012,33(3):67-73.
[7]VAN D Z F P,VILLAVERDE S.Combined anaerobicaerobic treatment of azo dyes:a short review of bioreactor studies[J].Water Research,2005,39(8):1425-1440.
[8]ROTT U,MINKE R.Overview of wastewater treatment and recycling in the textile processing industry[J].Water Science and Technology,1999,40(1):137-144.
[9]张隆,王竞,周集体,等.酸性偶氮染料还原产物强化偶氮染料生物脱色[J].中国环境科学,2008,28(3):237-241.ZHANG Long,WANG Jing,ZHOU Jiti,et al.Enhanced biological decolourization of azo dyes by the catalysis of reduced acid azo dyes[J].China Environmental Science,2008,28(3):237-241.
[10]DAI R,CHEN X,LUO Y,et al.Inhibitory effect and mechanism of azo dyes on anaerobic methanogenic wastewater treatment:can redox mediator remediate the inhibition?[J].Water Research,2016,104:408-417.
[11]DAI R,CHEN X,MA C,et al.Insoluble/immobilized redox mediators for catalyzing anaerobic bio-reduction of contaminants[J].Reviews in Environmental Science and Bio/Technology,2016,15(3):379-409.
[12]CERVANTES F J,GARCIA-ESPINOSA A,MORENOREYNOSA M A,et al.Immobilized redox mediators on anion exchange resins and their role on the reductive decolorization of azo dyes[J].Environmental Science&Technology,2010,44(5):1747-1753.
[13]李志刚.偶氮染料降解氧化产物苯胺的液相色谱/质谱联用法测定[J].纺织学报,2015,36(5):69-73.LI Zhigang.Determination of oxidative product aniline in degradation azo dye by liquid-phase chromatography coupled with mass spectrometry[J].Journal of Textile Research,2015,36(5):69-73.
[14]CERVANTES F J,SIJRK V D V,LETTINGA G,et al.Competition between methanogenesis and quinone respiration for ecologically important substrates in anaerobic consortia[J].FEMS Microbiology Ecology,2000,34(2):161-171.
[15]HONG Y G,GUO J,XU Z C,et al.Humic substances act as electron acceptor and redox mediator for microbial dissimilatory azoreduction by Shewanella decolorationis S12[J].Journal of Microbiology and Biotechnology,2007,17(3):428-437.
[16]GARC A O,CAMARERO S,COLOM J F,et al.Optimization of a laccase-mediator stage for TCF bleaching of flax pulp[J].Holzforschung,2003,57(5):513-519.
[17]VAN D Z F P,BISSCHOPS I A E,LETTINGA G,et al.Activated carbon as an electron acceptor and redox mediator during the anaerobic biotransformation of azo dyes[J].Environmental Science&Technology,2003,37(2):402-408.