低强度超声波强化ABR处理低浓度污水
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摘要
为提高ABR(厌氧折流板反应器)对低浓度污水的处理效果,通过设置超声组和对照组ABR的对比试验,考察低强度超声波对ABR处理低浓度污水的强化效果.结果表明,当采用声能密度为0.1 W/m L的超声波,每隔24 h从ABR中各隔室内取出10%的污泥进行10 min的辐照处理时,平均COD总去除率提高7.2%左右.通过该辐照处理,ABR中各隔室内的胞外聚合物总量基本不变、蛋白质的含量有所提高、多糖的含量有所降低、DNA的含量变化不大、颗粒污泥的粒径减小.研究还发现,低温条件下,超声组ABR的平均COD去除率比对照组提高了8.6%,只低于常温条件下对照组0.7%.低温条件下的超声强化效果比常温条件下更显著,而且超声组ABR比对照组提前4 d恢复稳定运行.
To improve the treatment effect of ABR(anaerobic baffled reactor) for low concentration wastewater,the effect of low intensity ultrasound on the treatment of low concentration wastewater was studied by perform-ing a contrast test of ABR in ultrasonic group and control group. The results show that when using the energy density of 0.1 W/m L ultrasonic every 24 h from each compartment of ABR removed 10 % sludge for 10 min of irradiation processing, the average removal rate of COD increased by about 7.2 %. By this irradiation, the total amount of extracellular polymeric in each compartment of ABR is essentially the same, the content of protein is increased, the content of polysaccharides is reduced, the content of DNA changes little, and the particle size of granular sludge is decreased. It is also found that the average COD removal rate of ABR in the ultrasonic group is 8.6 percentage points lower than that in the control group at low temperature, which is only 0.7 per-centage points lower than that in the control group. Under low temperature condition, the strengthening effect of ultrasound is more significant than that of normal temperature,and the ABR of the ultrasound group is 4days earlier than the control group to resume stable operation.
To improve the treatment effect of ABR(anaerobic baffled reactor) for low concentration wastewater,the effect of low intensity ultrasound on the treatment of low concentration wastewater was studied by perform-ing a contrast test of ABR in ultrasonic group and control group. The results show that when using the energy density of 0.1 W/m L ultrasonic every 24 h from each compartment of ABR removed 10 % sludge for 10 min of irradiation processing, the average removal rate of COD increased by about 7.2 %. By this irradiation, the total amount of extracellular polymeric in each compartment of ABR is essentially the same, the content of protein is increased, the content of polysaccharides is reduced, the content of DNA changes little, and the particle size of granular sludge is decreased. It is also found that the average COD removal rate of ABR in the ultrasonic group is 8.6 percentage points lower than that in the control group at low temperature, which is only 0.7 per-centage points lower than that in the control group. Under low temperature condition, the strengthening effect of ultrasound is more significant than that of normal temperature,and the ABR of the ultrasound group is 4days earlier than the control group to resume stable operation.
引文
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[12]何慧,郑敏,付宏祥,等.超声—SBR组合工艺去除污染物和污泥减量效果研究[J].2013(增刊1):151-154.
[13]CHU C P,LEE D J,CHANG B V,et al.Weak ultrasonic pretreatment on anaerobic digestion of flocculated activated biosolids[J].Water Research,2002,36(2):681-688.
[14]谢倍珍,刘红.超声波强化污水厌氧生物处理综述[J].环境污染与防治,2006,28(4):267-269.
[15]ZHU Y C,LI X,DU M A,et al.Promotion of anaerobic baffled reactor in the treatment of low concentration sewage by low energy ultrasonic irradiation[J].International Journal of Earth Science and Eenineering,2014,7(6):2528-2536.
[16]朱易春,李欣,杜茂安,等.低强度超声辐照对厌氧污泥性能的影响[J].中国给水排水,2015,11(21):84-88.
[17]闫怡新,刘红.低强度超声波强化污水生物处理中超声辐照周期的优化选择[J].环境科学,2006,27(5):898-902.
[18]刘红,闫怡新,王文燕,等.低强度超声波改善污泥活性[J].环境科学,2005,26(4):124-128.
[19]关玮,肖莆,周晓铁.污泥中胞外聚合物(EPS)的研究进展[J].化学工程,2009,23(6):35-39.
[20]曹秀芹,赵自玲.胞外聚合物(EPS)构成的影响因素分析[J].环境科学与技术,2010,33(12):420-424.
[2]KRISHNA GVTG,KUMAP P,KUMAR P.Complex wastewater treatment using an anaerobic baffled reactor[J].Environment Progress,2007,26(4):391-398.
[3]杜接弟,王毅力,李炯,等.HRT对ABR处理低浓度废水的效果和颗粒污泥特征的影响[J].环境科学,2009,30(7):2022-2029.
[4]欧阳勇.低浓度废水处理的研究进展[J].广西轻工业,2009,1(12):19-23.
[5]赵来利,佘宗莲,高孟春,等.常温下ABR处理低浓度废水性能及污泥特性[J].环境工程学报,2010,4(4):761-766.
[6]郭昱廷,彭剑峰,宋永会,等.温度对ABR反应器处理效果和微生物群落结构的影响[J].环境科学学报,2012,32(7):1542-1548.
[7]余亚琴,吕锡武,吴义锋.改进型ABR处理太湖富藻水启动研究[J].湖南大学学报,2014,41(3):94-100.
[8]XIE B Z,WANG L,LIU H.Using low intensity ultrasound to improve the efficiency of biological phosphorus removal[J].Ultrasoncs Sonochemistry,2008,15(5):775-781.
[9]XIE B Z,LIU H,YAN Y X.Improvement of the activity of anaerobic sludge by low intensity ultrasound[J].Journal of Environmental Management,2008,90(1):260-264.
[10]谢倍珍,刘红,阎怡新,等.低强度超声波强化污水生物处理理论与技术[M].北京:科学出版社,2013:73-83.
[11]闫怡新,刘红,张山立,等.低强度超声波强化SBR处理生活污水[J].环境科学,2006,27(8):1596-1602.
[12]何慧,郑敏,付宏祥,等.超声—SBR组合工艺去除污染物和污泥减量效果研究[J].2013(增刊1):151-154.
[13]CHU C P,LEE D J,CHANG B V,et al.Weak ultrasonic pretreatment on anaerobic digestion of flocculated activated biosolids[J].Water Research,2002,36(2):681-688.
[14]谢倍珍,刘红.超声波强化污水厌氧生物处理综述[J].环境污染与防治,2006,28(4):267-269.
[15]ZHU Y C,LI X,DU M A,et al.Promotion of anaerobic baffled reactor in the treatment of low concentration sewage by low energy ultrasonic irradiation[J].International Journal of Earth Science and Eenineering,2014,7(6):2528-2536.
[16]朱易春,李欣,杜茂安,等.低强度超声辐照对厌氧污泥性能的影响[J].中国给水排水,2015,11(21):84-88.
[17]闫怡新,刘红.低强度超声波强化污水生物处理中超声辐照周期的优化选择[J].环境科学,2006,27(5):898-902.
[18]刘红,闫怡新,王文燕,等.低强度超声波改善污泥活性[J].环境科学,2005,26(4):124-128.
[19]关玮,肖莆,周晓铁.污泥中胞外聚合物(EPS)的研究进展[J].化学工程,2009,23(6):35-39.
[20]曹秀芹,赵自玲.胞外聚合物(EPS)构成的影响因素分析[J].环境科学与技术,2010,33(12):420-424.