Effect of Temperature on Nutrient Removal of Pilot scale SBR Process With DO Control by Frequency Conversion
GU Sheng bo,WANG Shu ying,YANG Pei,LI Ling yun,LI lun and YANG Qing
DOI:10.11835/j.issn.1674-4764.2010.04.022
Received December 15, 2009,Revised , Accepted , Available online July 01, 2015
Volume ,2010,Pages 113-117
- Abstract
The effect of temperature on nutrient removal performance and operation cost with DO control by frequency conversion was investigated during the long term operation process of treating realistic domestic wastewater with pilot scale SBR process. It is found that the temperature has limited influence on the removal efficiency of COD and PO43- P, while has obvious impact on ammonia removal. Ammonia oxidation rate decreased sharply with the decrease of temperature when the temperature was from 11 to 26℃. Meanwhile, phosphorous uptake and release rate of microorganism almost fixed at normal level under temperature (18 26℃) and decreased sharply at temperature (11 18℃). Finally, the variation of energy consumption at different temperature was investigated. And the effect of DO control by frequency conversion on the energy consumption of aeration phase was analyzed.