Improvement of activated sludge bacteria growth by low intensity ultrasound

International Conference on Water Resource and Environment 2016

地球科学;生态环境科学

Yan, Y.X.^1 ; Ding, J.Y.^1 ; Gao, J.L.^1

School of Water Conservancy and Environment, Zhengzhou University, Zhengzhou, Henan, China^1

关键词: Activated sludge;    Activated sludge bacteria;    Irradiation time;    Low intensity ultrasound;    Optimal conditions;    Specific oxygen uptake rate;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/39/1/012006/pdf
DOI  :  10.1088/1755-1315/39/1/012006

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Influence of low intensity ultrasound (US) on growth rate of bacteria separated from aerobic activated sludge was studied. In order to reveal the optimal ultrasonic conditions,specific oxygen uptake rate (SOUR) of activated sludge was first detected and results showed that the maximum SOUR was obtained (increased by 40%) at US intensity of 3 Wcm-2 and irradiation time of 10min. Under the optimal conditions, 2 species of bacteria isolated from activated sludge were sonicated and then cultivated for 36h, and increment of 6% and 10% of growth rate were detected for the 2 species of bacteria, respectively, indicating US irradiation of suitable parameters effectively improved activated sludge bacteria growth.