低强度超声在低C/N污水处理中的应用  

Application of low-intensity ultrasound to the treatment of low C/N sewage

作　　者：王佳琪[1] 朱易春[1] 李齐佳 

机构地区：[1]江西理工大学建筑与测绘工程学院,江西赣州341000

出　　处：《工业水处理》2017年第5期63-67,共5页Industrial Water Treatment

基　　金：江西省教育厅重点项目(GJJ150615);江西理工大学重点基金项目(NSFJ2015-K04);江西省研究生创新专项资金项目(016-S312)

摘　　要：采用低C/N污水驯化的污泥为试验对象,以比耗氧速率和脱氢酶活性为表征,研究在超声频率为20 kHz,功率密度为0~0.35 W/mL、辐照时间为0~60 min处理后污泥活性的变化。结果显示,当采用声能密度和辐照时间为0.2 W/mL和12 min时,提高污泥活性的效果最显著。探究最佳条件下超声处理后0~10 h污泥活性的变化规律,发现辐照后5 h污泥活性达到最大,随后逐渐下降,直到8~10 h促进作用基本消失。采用辐照污泥比例分别为5%、15%和25%时,得出的最佳辐照污泥比例为15%,COD、氨氮、总磷出水浓度比对照组分别降低39.6%、37.1%、14.9%。Using low C/N wastewater cultivated sludge as experiment object,and specific oxygen uptake rate（SOUR）and dehydrogenase（DHA） as characterization,the sludge activity changes have been studied,after treated under the conditions below：ultrasonic frequency 20 kHz,power density 0-0.35 W/mL,and irradiation time 0-60 min.The results show that when the sound energy density is 0.2 W/mL and irradiation time 12 min,the effects of increasing sludge activity is the most remarkable.After treated under the optimal conditions for 0-10 h.The changing rule of the activity of sludge is probed into.It is found that after irradiated for 5 h,the sludge activity reaches the highest,then goes down gradually,and the stimulating effect disappears basically till 8-10 h.When the proportions of irradiated sludge used are 5%,15% and 25% respectively,the best irradiated sludge proportion obtained is 15%.Compared with the contrasted group,the concentrations of COD,ammonia nitrogen and total phosphorus in effluent decrease by 39.6%,37.1% and 14.9%,respectively.

关 键 词：低强度超声 污泥活性 低C/N污水 比耗氧速率 脱氢酶活性 

分 类 号：X703.1[环境科学与工程—环境工程]