厌氧膜生物反应器对乳品废水处理效果的研究
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摘要
采用厌氧膜生物反应器(AnMBR)对乳品废水进行处理,装置连续运行100d,研究了不同进水COD_(Cr)浓度(3 000、5 000、7 000、9 000 mg/L)对出水水质及反应器内污泥特性的影响,并与常规厌氧生物反应器的处理效果进行对比。结果表明,温度为35℃,HRT为48h时,COD_(Cr)去除率和氨化率随着进水COD_(Cr)浓度的降低而升高,最高可达89%和38%以上。TN去除率随着进水COD_(Cr)浓度的增加先增高后降低,在7 000 mg/L条件下,去除率为55%。装置在运行过程中,MLVSS/MLSS平均值约为0. 7,SVI值在60～80 m L/g的范围内,污泥具有良好的活性与沉降性。AnMBR与常规厌氧生物反应器相比,在处理高浓度乳品废水时运行更加稳定,耐冲击负荷能力更强,出水水质更好。
The anaerobic membrane bioreactor( An MBR) was used to treatment dairy wastewater,and the effects of different COD_(Cr)influent concentration( 3 000,5 000,7 000 and 9 000 mg/L) on effluent water quality and sludge characteristics in An MBR were investigated,and the performance of An MBR was compared with conventional anaerobic bioreactor under the same conditions. The result showed that at the temperature of 35 ℃,HRT was 48 h,the COD_(Cr)removal rate and ammonification rate increased with the decrease of COD_(Cr)concentration,can reach 89% and 38%,respectively. The TN removal rate increased first and then decreased with the increase of influent COD_(Cr)concentration,and reached the maximum removal rate of about 55% when the influent COD_(Cr)concentration was 7 000 mg/L. During treatment process,the MLVSS/MLSS was 0. 7 on average,the SVI value was in the range of 60 ～ 80 m L/g,which indicted a good activity and sedimentation of sludge. In addition,by comparing with conventional anaerobic bioreactors,An MBR runs more steadily and exhibited a stronger ability to mitigate shock load in the treatment of concentrated dairy wastewater.
The anaerobic membrane bioreactor( An MBR) was used to treatment dairy wastewater,and the effects of different COD_(Cr)influent concentration( 3 000,5 000,7 000 and 9 000 mg/L) on effluent water quality and sludge characteristics in An MBR were investigated,and the performance of An MBR was compared with conventional anaerobic bioreactor under the same conditions. The result showed that at the temperature of 35 ℃,HRT was 48 h,the COD_(Cr)removal rate and ammonification rate increased with the decrease of COD_(Cr)concentration,can reach 89% and 38%,respectively. The TN removal rate increased first and then decreased with the increase of influent COD_(Cr)concentration,and reached the maximum removal rate of about 55% when the influent COD_(Cr)concentration was 7 000 mg/L. During treatment process,the MLVSS/MLSS was 0. 7 on average,the SVI value was in the range of 60 ～ 80 m L/g,which indicted a good activity and sedimentation of sludge. In addition,by comparing with conventional anaerobic bioreactors,An MBR runs more steadily and exhibited a stronger ability to mitigate shock load in the treatment of concentrated dairy wastewater.
引文
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[10]Rad S J,Lewis M J.Water utilisation,energy utilisation and waste water management in the dairy industry:a review[J].International Journal of Dairy Technology,2014,67(1):1-20.
[11]Karadag D,K9ro4lu O E,Ozkaya B,et al.A review on anaerobic biofilm reactors for the treatment of dairy industry wastewater[J].Process Biochemistry,2015,50(2):262-271.
[12]Yu H Q,Fang H H P.Acidogenesis of dairy wastewater at various p H levels[J].Water Science and Technology,2002,45(10):201-206.
[13]Sivakumar P,Bhagiyalakshmi M,Anbarasu K.Anaerobic treatment of spoiled milk from milk processing industry for energy recovery-A laboratory to pilot scale study[J].Fuel,2012,96:482-486.
[14]Diamantis V I,Kapagiannidis A G,Ntougias S,et al.Two-stage CSTR-UASB digestion enables superior and alkali addition-free cheese whey treatment[J].Biochemical Engineering Journal,2014,84:45-52.
[15]Kalyuzhnyi S V,Martinez E P,Martinez J R.Anaerobic treatment of high-strength cheese-whey wastewaters in laboratory and pilot UASB-reactors[J].Bioresource Technology,1997,60(1):59-65.
[16]孙凯,陆晓峰,周保昌,等.厌氧膜生物反应器(An MBR)处理高浓度豆制品废水的研究[J].膜科学与技术,2011,31(4):65-69.
[2]Baskaran K,Palmowski L M,Watson B M.Wastewater reuse and treatment options for the dairy industry[J].Water Science and Technology:Water Supply,2003,3(3):85-91.
[3]Balannec B,Gésan-Guiziou G,Chaufer B,et al.Treatment of dairy process waters by membrane operations for water reuse and milk constituents concentration[J].Desalination,2002,147(1-3):89-94.
[4]晁雷,赵晓光,李晓东,等.国内外乳制品工业废水生物处理技术研究进展[J].江苏农业科学,2014,42(1):1-4.
[5]白玲.浸没式双轴旋转厌氧膜生物反应器的研究[D].南昌:南昌大学,2008.
[6]许颖,夏俊林,黄霞.厌氧膜生物反应器污水处理技术的研究现状与发展前景[J].膜科学与技术,2016,36(4):139-149.
[7]O’Flaherty V,Collins G,Mahony T.The microbiology and biochemistry of anaerobic bioreactors with relevance to domestic sewage treatment[J].Reviews in Environmental Science and Bio/Technology,2006,5(1):39-55.
[8]张欣欣,沈菊李,朱宝库,等.厌氧膜生物反应器的研究及其在废水处理中的应用[J].膜科学与技术,2008,28(2):79-84.
[9]Galib M,Elbeshbishy E,Reid R,et al.Energy-positive food wastewater treatment using an anaerobic membrane bioreactor(AnMBR)[J].Journal of environmental management,2016,182:477-485.
[10]Rad S J,Lewis M J.Water utilisation,energy utilisation and waste water management in the dairy industry:a review[J].International Journal of Dairy Technology,2014,67(1):1-20.
[11]Karadag D,K9ro4lu O E,Ozkaya B,et al.A review on anaerobic biofilm reactors for the treatment of dairy industry wastewater[J].Process Biochemistry,2015,50(2):262-271.
[12]Yu H Q,Fang H H P.Acidogenesis of dairy wastewater at various p H levels[J].Water Science and Technology,2002,45(10):201-206.
[13]Sivakumar P,Bhagiyalakshmi M,Anbarasu K.Anaerobic treatment of spoiled milk from milk processing industry for energy recovery-A laboratory to pilot scale study[J].Fuel,2012,96:482-486.
[14]Diamantis V I,Kapagiannidis A G,Ntougias S,et al.Two-stage CSTR-UASB digestion enables superior and alkali addition-free cheese whey treatment[J].Biochemical Engineering Journal,2014,84:45-52.
[15]Kalyuzhnyi S V,Martinez E P,Martinez J R.Anaerobic treatment of high-strength cheese-whey wastewaters in laboratory and pilot UASB-reactors[J].Bioresource Technology,1997,60(1):59-65.
[16]孙凯,陆晓峰,周保昌,等.厌氧膜生物反应器(An MBR)处理高浓度豆制品废水的研究[J].膜科学与技术,2011,31(4):65-69.