Performance and kinetics of ANAMMOX granular sludge with pH shock in a sequencing batch reactor

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境水质学国家重点实验室

	Performance and kinetics of ANAMMOX granular sludge with pH shock in a sequencing batch reactor
	Wang, Dan; Li, Jin; Zhu, Weiqiang; Dong, Huiyu
刊名	BIODEGRADATION
	2017-08-01
卷号	28 期号:4 页码:245-259
关键词	Anammox Ph Shock Nitrogen Removal Particle Size Distribution (Psd) Kinetics
英文摘要	As an efficient and cost-effective nitrogen removal process, anaerobic ammonium oxidation (ANAMMOX) could be well operated at suitable pH condition. However, pH shock occurred in different kinds of wastewater and affected ANANNOX process greatly. The present research aimed at studying the performance and kinetics of ANAMMOX granular sludge with pH shock. When influent pH was below 7.5, effluent -N and -N increased with decreasing pH. At Ph 6.0, effluent -N approached 100 mg/L, and the ratios of approached 2.2 and 1.3, respectively. Both greatly deviated from theoretical values. When influent pH was above 7.5, effluent -N and -N increased with increasing pH. At pH 9.0, ammonium removal rate (ARR) and nitrite removal rate (NRR) decreased to 0.011 +/- 0.004 and 0.035 +/- 0.004 kg/(m(3)center dot d), respectively. Besides, -N:-N deviated from theoretical value. Longer recovery time from pH 9.0 than from pH 6.0 indicated that alkaline surroundings inhibited anaerobic ammonium oxidizing bacteria (AAOB) greater. The sludge settling velocity was 2.15 cm/s at pH 7.5. However, it decreased to 2.02 cm/s when pH was 9.0. Acidic pH had little effect on sludge size, but disintegration of ANAMMOX granule was achieved with pH of 9.0. The Bell-shaped (A) model and the Ratkowsky model were more applicable to simulate the effect resulting from pH shock on ANAMMOX activity (R-2 > 0.95), and both could describe ANAMMOX activity well with pH shock. They indicated that q(max) was 0.37 kg -N/(kgMLSS center dot d) at the optimum pH value (7.47) in present study. The minimum pH during which ANAMMOX occurred was 5.68 while the maximum pH for ANAMMOX reaction was 9.26. Based on nitrogen removal performance with different pH, strongly acidic (pH ae 6.5) or alkaline (pH ae 8.5) inhibited ANAMMOX process. Besides, ANAMMOX appeared to be more susceptible to alkaline wastewater. Compared to extremely acidic condition (low pH), extremely alkaline condition (high pH) affected ANAMMOX granules much more.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/39541]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Wang, Dan,Li, Jin,Zhu, Weiqiang,et al. Performance and kinetics of ANAMMOX granular sludge with pH shock in a sequencing batch reactor[J]. BIODEGRADATION,2017,28(4):245-259.
APA	Wang, Dan,Li, Jin,Zhu, Weiqiang,&Dong, Huiyu.(2017).Performance and kinetics of ANAMMOX granular sludge with pH shock in a sequencing batch reactor.BIODEGRADATION,28(4),245-259.
MLA	Wang, Dan,et al."Performance and kinetics of ANAMMOX granular sludge with pH shock in a sequencing batch reactor".BIODEGRADATION 28.4(2017):245-259.