基于正交试验设计的SBBR处理造纸废水工艺优化
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摘要
为提高原序批式活性污泥法(SBR)工艺对造纸废水的处理效能,在SBR工艺的基础上投加悬浮填料进行改进,即构成序批式生物膜反应器(SBBR)。正交试验是利用正交表来设计试验方案的多因素多水平优选的一种高效试验设计方法。采用SBBR工艺,通过正交试验探讨不同水平的水力停留时间(HRT)、曝气量以及填充率对废水中污染物去除效果的影响。结果表明,经30 d的培养驯化,反应器正式启动,采用极差法及综合平衡法分析确定最优水平组合:HRT为8 h,曝气量为9 L·min~(-1),填充率为35%时,污染物去除率最高。在此工况下运行时,COD、NH_3-N、SS的平均去除率分别可达92.62%、88.26%、88.42%。
In order to improve the treatment efficiency of papermaking wastewater of sequencing batch reactor(SBR), adding suspension fillers on the basis of SBR process was proposed to construct sequential batch biofilm reactor(SBBR). Orthogonal test was a kind of efficient test design method which used orthogonal table to design the test scheme. The effects of different levels of hydraulic retention time(HRT), aeration and filling rate on the removal of pollutants in wastewater were investigated through orthogonal test by using SBBR process. The results showed that after 30 days of culture and acclimation, the reactor was officially started, and the optimal level combination was determined by using range method and comprehensive balance method:when the HRT was 8 h, the aeration was 9 L · min~(-1), and the filling rate was 35%, the pollutant removal rate was the highest. Under this condition, the average removal rates of COD, NH_3-N and SS were 92.62%, 88.26% and 88.42%, respectively.
In order to improve the treatment efficiency of papermaking wastewater of sequencing batch reactor(SBR), adding suspension fillers on the basis of SBR process was proposed to construct sequential batch biofilm reactor(SBBR). Orthogonal test was a kind of efficient test design method which used orthogonal table to design the test scheme. The effects of different levels of hydraulic retention time(HRT), aeration and filling rate on the removal of pollutants in wastewater were investigated through orthogonal test by using SBBR process. The results showed that after 30 days of culture and acclimation, the reactor was officially started, and the optimal level combination was determined by using range method and comprehensive balance method:when the HRT was 8 h, the aeration was 9 L · min~(-1), and the filling rate was 35%, the pollutant removal rate was the highest. Under this condition, the average removal rates of COD, NH_3-N and SS were 92.62%, 88.26% and 88.42%, respectively.
引文
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[2]邹丽,郑红领.造纸废水技术现状及展望[J].山东化工,2017,11(46):179-184.
[3]万建信,何仕均,孙伟华,等.造纸废水的电离辐射预处理工艺研究[J].环境科学,2011,32(6):1638-1643.
[4]凌琪,李尚尚,伍昌年,等.投加气化渣对DMBR处理造纸废水污泥性能及膜污染的影响[J].阜阳师范学院学报(自然科学版),2018,35(2):15-20.
[5]张成,雷利荣,李友明.臭氧处理对造纸废水COD和色度去除效果研究[J].造纸科学与技术,2016,35(3):79-81.
[6]ROBERT L I,PETER A W,HANS-CURT F.Con trolled unsteady state Processes and technologies and technologies-an overview[J].Wat Sci Tech,1997,35(1):1-10
[7]PETER A W.Thchnology of membrane bilfilm reactors operat edunder periodically changing process condition[J].Wat Sci Tech,1995,31(1):173-183
[8]宋箭,赵秋燕,伍昌年,等.复合式动态膜生物反应器处理印染废水效能及膜污染控制研究,环境工程学报.2016,10(5):2193-2200.
[9]刘瑞江,张业旺,闻崇炜,等.正交试验设计和分析方法研究[J].实验技术与管理,2010,27(9):52-55.
[10]国家环境保护总局.水和废水监测分析方法(第4版).北京:中国环境科学出版社,2002.
[11]丛岩.UAFB-EGSB组合工艺处理城镇生活污水的研究[D].哈尔滨:哈尔滨工业大学,2013.
[12]谢元华,朱彤,徐成海,等.膜生物反应器中膜污染影响因素的研究进展[J].化学工程,2010,38(10):23-32.
[13]YUN M A,YEON K M,PARK J S,et al.Characterization of biofilm structure and its effect on membrane permeability in MBR for dye wastewater treatment[J].Water Research,2006,40(1):45-52.
[14]Kim H Y,Yeon K M,Lee C H,et al.Biofilm structure and extracellular polymeric substances in low and high dissolved Oxygen membrane bioreactors[J].Separation Science and Technology,2006,41(7):1213-1230.
[15]洪俊明,尹娟.溶解氧对动态膜生物反应器的处理效果及膜污染特性[J].化工进展,2011,30(5):1130-1134.
[16]何争光,张珂,谢丽清.SBBR工艺悬浮填料填充率的优化[J].中国给水排水,2012,28(15):28-30.
[17]金云霄,冯传平,丁大虎,等.悬浮填料SBBR处理生活污水的运行工况优化研究[J].中国给水排水,2010,26(3):34-38.
[18]张可方,张朝升,方茜,等.序批式生物膜法的脱氮除磷功效研究[J].中国给水排水,2006,22(3):77-79.