Indexed by:期刊论文

Date of Publication:2009-02-01

Journal:BIORESOURCE TECHNOLOGY

Included Journals:SCIE、PubMed

Volume:100

Issue:3

Page Number:1055-1060

ISSN No.:0960-8524

Key Words:Partial nitrification; Membrane bioreactor (MBR); Free ammonia (FA); Fluorescence in situ hybridization (FISH)

Abstract:In this study, the partial nitrification process was started-up successfully in a membrane bioreactor (MBR). The influence of temperature and DO was investigated by sequencing operation of membrane bioreactor. The preferred values were proved as 35 degrees C and 0.3-0.5 mg/L, respectively, and were indicated as indispensable controlling factors. In order to increase the sludge concentration, new seed sludge was added into the reactor, which caused the absolute destruction of the reactor performance. The results of reactor experiments showed that the free ammonia (FA) concentration of 74 mg NH(3)/L, as the influent ammonium concentration of 600 mg N/L, was a useful and effective factor to recover the partial nitrification performance. Fluorescence in situ hybridization analysis indicated that nitrifiers hybridizing with NIT3 and NSRI 156 were present and active in MBR, which were then eliminated under high FA concentration. The microbiological community analysis further provided the necessary biological information for the realization of partial nitrification. (c) 2008 Elsevier Ltd. All rights reserved.