水平搅拌下低高径比SBR中好氧活性污泥的颗粒化

Abstract
Figure/Table
References (36)
Related Citation (15)

Download: PDF (898 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract

Aerobic sludge granulation was investigated in a horizontal mechanical stirred and aerated SBR with lower ratio of height to diameter (H/D) of 1.2. The average shear rate that granules suffered was calculated and the effect of horizontal agitation on the granulation process was discussed. The results show, the aerobic sludge was granulated in the reactor with a mean diameter of 1.12mm and settling velocity of 21.41m/h finally. The average shear rate of granules was calculated out as 27.25s^-1, and the shear force 3.38×10^-2N/m². The average shear rate acted on the surface of the granules positively related to mechanical agitation speed and superficial gas upflow velocity, of which the mechanical agitation speed contributed more to the shear rate, about 37.48times of that the superficial gas upflow velocity did. It was considered that the eddy secondary flow pattern with appropriate shear force caused by transverse rotation of stirrer was essential to aerobic sludge granulation in the reactor with lower ratio of height to diameter.

Key words： aerobic granular sludge low ratio of height to diameter horizontal mechanical stirring hydrodynamic shear

Received: 05 February 2018

X703

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	QU Xin-yue
	FAN Wen-wen
	YUAN Lin-jiang
	ZHANG Rui-huan
	WEI Ping

Cite this article:

QU Xin-yue,FAN Wen-wen,YUAN Lin-jiang等. Aerobic sludge granulation under horizontal mechanical agitation in a SBR with lower ratio of height to diameter[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(9): 3358-3366.

URL:

http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I9/3358

[1]	Show K Y, Lee D J, Tay J H. Aerobic granulation:advances and challenges[J]. Applied Biochemistry & Biotechnology, 2012,167(6):1622-1640.
[2]	侯爱月,李军,王昌稳,等.不同好氧颗粒污泥中微生物群落结构特点[J]. 中国环境科学, 2016,36(4):1136-1144.
[3]	Van L M C M V, Brdjanovic D. Anticipating the next century of wastewater treatment.[J]. Science, 2014,344(6191):1452-1453.
[4]	Liu Y, Tay J H. The essential role of hydrodynamic shear force in the formation of biofilm and granular sludge.[J]. Water Research, 2002,36(7):1653-1665.
[5]	Liu Y Q, Tay J H. Variable aeration in sequencing batch reactor with aerobic granular sludge.[J]. Journal of Biotechnology, 2006,124(2):338-346.
[6]	Wagner J, Costa R H R D. Aerobic Granulation in a Sequencing Batch Reactor Using Real Domestic Wastewater[J]. Journal of Environmental Engineering, 2013,139(11):1391-1396.
[7]	Awang N A, Shaaban M G. The impact of reactor height/diameter (H/D) ratio on aerobic granular sludge (AGS) formation in sewage[J]. Jurnal Teknologi (Sciences & Engineering), 2015,77(32):95-103.
[8]	Tay J H, Liu Q S, Liu Y. The effects of shear force on the formation, structure and metabolism of aerobic granules[J]. Applied Microbiology & Biotechnology, 2001,57(1/2):227-233.
[9]	Beun J J, Hendriks A, Loosdrecht M C M V, et al. Aerobic granulation in a sequencing batch reactor[J]. Water Research, 2002,36(3):702-12.
[10]	吴昌永,王然登,彭永臻.污水处理颗粒污泥技术原理与应用[M]. 北京:中国建筑工业出版社, 2011.
[11]	Caluwé M, Dobbeleers T, D'aes J, et al. Formation of aerobic granular sludge during the treatment of petrochemical wastewater[J]. Bioresource Technology, 2017,238(1):559-567.
[12]	吴昌永,周岳溪.厌氧/好氧运行方式对颗粒污泥形成的影响[J]. 中国环境科学, 2013,33(7):1237-1243.
[13]	隗启源.好氧颗粒污泥处理低浓度生活污水同步脱氮除磷的研究[D]. 武汉:华中科技大学, 2013.
[14]	高景峰,郭建秋,陈冉妮,等.SBR反应器排水高度与直径比对污泥好氧颗粒化的影响[J]. 中国环境科学, 2008,28(6):512-516.
[15]	李浩,袁林江.好氧SBR反应器中污泥颗粒化过程的成核研究[J]. 中国给水排水, 2008,24(13):42-45.
[16]	Awang N A, Shaaban M G. Effect of reactor height/diameter ratio and organic loading rate on formation of aerobic granular sludge in sewage treatment[J]. International Biodeterioration & Biodegradation, 2016, 112(1):1-11.
[17]	易诚,湛含辉,陈津端,等.搅拌-序批式活性污泥反应器(WSBR)中好氧颗粒污泥的特性研究[J]. 环境科学学报, 2011,31(2):268-275.
[18]	Zhong C, Wang Y, Yao C L I, et al. The characteristic and comparison of denitrification potential in granular sequence batch reactor under different mixing conditions[J]. Chemical Engineering Journal, 2014, 240(6):589-594.
[19]	李冬,苏庆岭,梁瑜海,等.机械搅拌对CANON污泥快速颗粒化的影响[J]. 中国环境科学, 2015,35(1):72-79.
[20]	国家环保局.水和废水监测分析方法[M]. 北京:中国环境科学出版社, 1997.
[21]	Serra T, CasamitjanA X. Structure of the Aggregates During the Process of Aggregation and Breakup Under a Shear Flow[J]. Journal of Colloid & Interface Science, 1998,206(2):505-511.
[22]	Long B, Yang C Z, Pu W H, et al. Rapid cultivation of aerobic granular sludge in a pilot scale sequencing batch reactor.[J]. Bioresource Technology, 2014,166(8):57-63.
[23]	Su K Z, Yu H Q. Formation and characterization of aerobic granules in a sequencing batch reactor treating soybean-processing wastewater.[J]. Environmental Science & Technology, 2005,39(8):2818-27.
[24]	王超,郑晓英.剪切应力对好氧颗粒污泥形态结构和微生物活性的影响机制研究[J]. 环境科学, 2008,29(8):2235-2241.
[25]	Cerri M O, Futiwaki L, Jesus C D F, et al. Average shear rate for non-Newtonian fluids in a concentric-tube airlift bioreactor[J]. Biochemical Engineering Journal, 2008,39(1):51-57.
[26]	Campesi A, Cerri M O, Hokka C O, et al. Determination of the average shear rate in a stirred and aerated tank bioreactor[J]. Bioprocess Biosyst. Eng., 2009,32(2):241-248.
[27]	Kawase Y, Hashiguchi N. Gas-liquid mass transfer in external-loop airlift columns with newtonian and non-newtonian fluids[J]. Chemical Engineering Journal & the Biochemical Engineering Journal, 1996,62(1):35-42.
[28]	湛含辉,钟乐.二次流场促进颗粒污泥成型的研究[J]. 环境工程, 2009,27(s1):205-208.
[29]	湛雪辉,湛含辉,钟乐.高浓度活性污泥中二次流传质效果的实验研究[J]. 矿冶工程, 2007,27(3):37-40.
[30]	湛含辉.二次流原理[M]. 长沙:中南大学出版社, 2006.
[31]	陈冉妮.好氧颗粒污泥的培养、维持及应用的基础研究[D]. 北京:北京工业大学, 2009.
[32]	Ren T T, Mu Y, Liu L, et al. Quantification of the shear stresses in a microbial granular sludge reactor.[J]. Water Research, 2009,43(18):4643-4651.
[33]	Forster C F. The rheological and physico-chemical characteristics of sewage sludges[J]. Enzyme & Microbial Technology, 2002,30(3):340-345.
[34]	Sozanski M M, Kempa E S, Grocholski K, et al. The rheological experiment in sludge properties research[J]. Water Science & Technology, 1997,36(11):69-78.
[35]	李永林,范文雯,袁林江,等.气升流速变化对SBR污泥颗粒化的作用及机理[J]. 环境科学学报, 2017,37(10):3642-3648.
[36]	Pilz R D, Hempel D C. Mechanical stress on suspended particles in two-and three-phase airlift loop reactors and bubble columns[J]. Chemical Engineering Science, 2005,60(22):6004-6012.