文档介绍：Biofiltetration of nitrogen oxides by immobilized
nitrifying bacteria cells
Zaishan Wei* Hejingying Niu
School of Environmental Science and Engineering School of Environmental Science and Engineering
Sun Yat-sen University Sun Yat-sen University
Guangzhou 510275, People’s Republic of China Guangzhou 510275, People’s Republic of China
E-mail address: weizaishan98@ E-mail address: niuhejingying@
Abstract—The biofilter packed with immobilized nitrifying concentration, empty bed residence time (EBRT), pH and
bacteria cells (INBC) could be used to removal of nitrogen oxides( sprinkling amount on performance of the biofilter system, and
NOx)in low concentration. Nitrifying bacteria were immobilized the biodegradation ics of immobilized anism was
using sodium alginate and polyvinyl alcohol as entrapped materials. elicited..
The experimental results showed that NOx removal efficiency
achieved %; the optimal pH, sprinkling amount and empty bed
II. MATERIAL AND METHODS
residence time (EBRT) are , l/h and s, respectively.
Nitrogen oxides(NOx)biodegradation reaction rate follows Conditioning of immobilized cells
enzymatic catalytic ics. The use of the immobilization The activated sludge (originally taken from a secondary
anism technique proves to be an efficient way to achieve sedimentation tank at Guangzhou Urban Was