Study on nitrogen removal performance of sequencing batch reactor enhanced by low intensity ultrasound

被引：32
|
作者：
Zhang, Ruina [1 ]
Jin, Ruofei [1 ]
Liu, Guangfei [1 ]
Zhou, Jiti [1 ]
Li, Chun Ling [1 ]
机构：
[1] Dalian Univ Technol, Sch Environm Sci & Technol, Key Lab Ind Ecol & Environm Engn MOE, Dalian 116024, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2011年 / 102卷 / 10期
基金：
中国博士后科学基金;
关键词：
Ultrasound irradiation; Wastewater treatment; Biological activity; Nitrogen removal; WASTE-ACTIVATED-SLUDGE; NITRIFYING BACTERIA; DISINTEGRATION; WATER;
D O I：
10.1016/j.biortech.2011.02.112
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Sequencing batch reactor (SBR) was widely used in the treatment of various wastewater. The effects of low intensity ultrasound on the nitrogen removal performance of SBR were studied. The optimum operation conditions were determined to be 35 kHz, 0.15 W cm(-2), and irradiation time of 10 min. Compared with those of the control reactor, the organic, NH4+-N, NO2--N and NO3--N loads of the ultrasound enhanced reactor (UER) were improved by 16.5%, 35.0%, 41.7% and 61.9%, respectively. Increased 2,3,5-triphenyl tetrazolium chloride-dehydrogenase and nitrification activities were observed with sludge in UER. Furthermore, negligible negative effects of ultrasound irradiation on the settle ability and sludge concentration were found, which resulted in no decrease of the nitrogen removal performance of the UER. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：5717 / 5721
页数：5
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