Effect of Pulsed Electric Field on Growth Metabolism of Aerobic Denitrifiers

doi:10.12068/j.issn.1005-3026.2022.01.016

Abstract

Abstract: Pulsed electric field(PEF)technology was applied to aerobic denitrification treatment of nitrate wastewater. By comparing the changes of growth metabolism of aerobic denitrifiers under different PEF strength， frequency， electrode distance and inoculation volume， the optimal process parameters of PEF treatment were determined. The results indicated that under the conditions of PEF strength 0.8V·cm^-1， frequency 1000Hz， electrode distance 5cm and inoculation volume 5%， the optical density at 600nm wavelengths (OD600)， removal efficiency of COD and NO^-₃-N of aerobic denitrifiers Pseudomonas putida W207-14 treated with PEF can reach the maximum value in 24h， which were 1.926±0.04，(97.67±1.12)% and(90.34±0.73)%， respectively. Compared with the untreated aerobic denitrifiers， the growth time of the treated aerobic denitrifiers is significantly reduced， and the nitrate removal rate is increased by 115.76%.

Key words: pulsed electric field(PEF); aerobic denitrifiers; growth metabolism; nitrate removal rate; enhancement

CLC Number:

TP20

WANG Fan， HU Xiao-min， LI Xue-jie， ZHANG Bo. Effect of Pulsed Electric Field on Growth Metabolism of Aerobic Denitrifiers[J]. Journal of Northeastern University(Natural Science), 2022, 43(1): 111-117.

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