The Effects of Kind and Concentration of Lye on Regeneration and Utilization in the Activated Carbon Regeneration Technique by Co-utilization of Lye and Ultrasonic Wave

YANG Tang;ZHAO Ying-jie;Du Shan;School of Environmental and Municipal Engineering,Qingdao Technological University;School of Environmental Science and Engineering,Ocean University of China;

Lye and ultrasonic coupling technique;;Activated carbon;;Regeneration;;Carbon loss;;Consumption of recycle lye

[Objective]The research aims to inspect the effects of different kinds and concentrations of lye on activated carbon regeneration efficiency in the lye and ultrasonic coupling technique. [Method] The experiments are conducted with potassium hydrogen phthalate( KHP)standard solution and secondary effluent of a treatment plant. After saturation adsorption,carbon is recycled by the lye and ultrasonic coupling technique. The effects of kind and concentration of lye on regeneration and utilization are researched by measuring consumption of lye and carbon loss. [Result] The usage amounts of Na OH,Mg( OH)2and Ca( OH)2are gradually increased for secondary effluent and KHP standard solution prepared artificially,while carbon decreases in sequence. When regenerating the saturated activated carbon under the same condition,as lye concentration increases,the consumption of any lye all decreases,and carbon loss increases. Controlling the same concentration of organic matter under the same test conditions,lye consumption of KHP standard solution prepared artificially is lower than secondary effluent,while the amount of carbon loss of KHP standard solution prepared artificially is higher than secondary effluent. [Conclusion] The research could provide reference for regeneration technique of the activated carbon.