摘要
Abstract
Dredged sediments unburned ceramsites (DSUC),which utilized dredged sediments as raw material,were manufactured in an unburned process.Moreover,magnetically modified unburned ceramsites (MUC)were used as a biological ceramsite filter (BCF)for wastewater treatment.To study the performance of wastewater treatment using different materials,commodity sintered ceramsites (CSC)were chosen as a reference,and the optimum biofilm culturing temperature of the MUC and CSC was determined by adjusting the temperature of the circulating water.During the wastewater treatment processes,the inflow of wastewater was continuous,with a velocity of 0.07 mL · s-1 The study results revealed that the treatment performed best at 30 ℃,for which the removals of COD,NH3-N,SS,and TP stabilized after 22 days,and their values were 55 ％,65 ％,78 ％,and 50％,respectively.Among the three types of BCFs (DSUC,MUC,and CSC),the wastewater treating capacity of the DSUC was similar to the CSC,and the performance of the MUC was the most significant.The removal rates of COD,NH3-N,SS,and TP by the MUC were stable at 65 ％,69％,79％,and 51％,respectively,after 22 days.This result showed that microbial activity was more likely enhanced in the weaker magnetic environment,allowing microorganism growth on the surface of the ceramsites to increase,thus improving the wastewater treatment efficiency.关键词
疏浚底泥/免烧陶粒/磁改性/陶粒过滤器/净水效果Key words
dredged sludge/unburned ceramsites/magnetic modification/ceramsite filter/water purification effect分类
资源环境
