膜生物反应器PVDF膜和尼龙膜污染特性

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Abstract

PVDF membrane was used in the early operation period (1~129d) and nylon mesh was used in the later operation period (220~360d) to analyze the nitrogen removal performance and membrane fouling characteristics of the two kind of membrane bioreactor (MBR) system. The MBR system was operated stably for 112d with the influent NH₄⁺-N and NO₂^--N concentrations of 400~740mg/L and 460~790mg/L, respectively. During this period, the total nitrogen removal efficiency (TNRE) maintained at about 86%, and the nitrogen removal rate (NRR) was 0.61~1.08kg N/(m³·d). After 263days' operation, mixed liquid suspended solids (MLSS) in the reactor increased from 4918mg/L to 7230mg/L, and the corresponding mixed liquor suspended solids (MLVSS) increased from 2585mg/L to 4455mg/L, the highest special anammox activity (SAA) was 0.46g N/(d·g VSS). For both PVDF membrane or nylon mesh, the cake layer resistance dominates at the end of a membrane fouling cycle, but their fouling mechanisms was different. Compared with that of PVDF membrane system, nylon mesh maintained good anti-fouling performance, even operated under the same HRT to PVDF membrane. Considering the nitrogen removal performance and the membrane fouling cycle, nylon mesh with HRT=1.5h was preferred in this experiment.

Key words： anammox MBR PVDF membrane nylon mesh membrane fouling

Received: 15 August 2019

PACS:

X703.1

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	Articles by authors
	LIU Qing-hua
	ZHU Yi-jing
	CAO Li-juan
	WANG Jun-jie
	WANG Ya-yi

Cite this article:

LIU Qing-hua,ZHU Yi-jing,CAO Li-juan等. Membrane fouling characteristics of PVDF membrane and nylon mesh in Anammox-MBRs[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(3): 1089-1096.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I3/1089

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