声能密度对短程硝化启动及氨氮去除动力学的影响  

Effect of ultrasonic density on partial nitrification and ammonia nitrogen removal kinetics

作　　者：黄书昌 朱易春[1,2] 章璋 李鑫 田帅[1,2] 连军锋 刘祖文[1,2] HUANG Shuchang;ZHU Yichun;ZHANG Zhang;LI Xin;TIAN Shuai;LIAN Junfeng;LIU Zuwen(Research Center for Water Quality Security Technology at Ganjiang River Basin, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China;School of Architectural and Surveying Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China)

机构地区：[1]江西理工大学赣江流域水质安全保障工程技术研究中心,江西赣州341000 [2]江西理工大学建筑与测绘工程学院市政工程系,江西赣州341000

出　　处：《化工进展》2019年第9期4335-4341,共7页Chemical Industry and Engineering Progress

基　　金：江西省自然科学基金(20181BAB206038);江西省研究生创新专项资金项目(YC2018-S317);国家自然科学基金(51868025)

摘　　要：为探究不同声能密度对短程硝化快速启动的影响,在序批式生物反应器(SBR)中采用不同声能密度超声波辐照污泥进行短程硝化启动性能研究,考察了启动时间、氮素转化、污泥性能、氨氧化菌(AOB)活性的差异,并研究了启动短程硝化过程中氨氮去除动力学参数的变化。结果表明,超声组(0.10W/mL、0.15W/mL、0.20W/mL、0.25W/mL、0.30W/mL)运行25天后,NO2--N浓度达到37.56mg/L,NO3--N浓度维持在10mg/L以下,亚硝酸盐积累率均高于90%,SVI维持在200mL/g左右,氨氧化菌活性(SOURAOB)分别为5.69mgO2/(gMLSS·h)、7.91mgO2/(gMLSS·h)、 10.66mgO2/(gMLSS·h)、 12.80mgO2/(gMLSS·h)、 9.69mgO2/(gMLSS·h),显著高于对照组[3.93mgO2/(gMLSS·h)],成功启动短程硝化。通过双倒数法拟合得到AOB的氨氮半饱和常数(KSN)分别为75.25mg/L、23.15mg/L、24.53mg/L、9.78mg/L和24.79mg/L,当声能密度为0.10W/mL时略大于对照组(74.21mg/L),其他超声组均显著小于对照组,超声波辐照可使AOB优先获得基质并实现增殖,从而快速启动短程硝化。In order to investigate the influence of different ultrasonic density on the partial nitrification rapidly start-up, the partial nitrification start-up performance was studied by using different ultrasonic density treatment in SBR. The start-up time, nitrogen conversion, sludge performance and activity of ammonia-oxidizing bacteria (AOB) were investigated, and the variation of kinetic parameters of ammonia nitrogen removal during partial nitrification were studied. In the ultrasonic group (0.10W/mL, 0.15W/mL, 0.20W/mL, 0.25W/mL, 0.30W/mL), after 25 days of operation, the concentration of NO2--N reached 37.56mg/L, and the concentration of NO3--N was maintained below 10mg/L, the nitrite accumulation rate (NAR) was higher than 90%, and the ammonia oxidizing bacteria activity(SOURAOB) was 5.69mgO2/(gMLSS·h), 7.91mgO2/(gMLSS·h), 10.66mgO2/(gMLSS·h), 12.80mgO2/(gMLSS·h), 9.69mgO2/(gMLSS·h), respectively. It was significantly higher than the control group [(3.93mgO2/(gMLSS·h)].The ammonia nitrogen half-saturation constant (KSN) of AOB obtained by double reciprocal method was 75.25mg/L, 23.15mg/L, 24.53mg/L, 9.78mg/L, 24.79mg/L, respectively. When the energy density was 0.10W/mL, KSN of AOB was slightly larger than the control group (74.21mg/L), and the others were significantly smaller than 74.21mg/L. Therefore, ultrasonic treatment allowed AOB to preferentially obtained the substrate and achieve proliferate, and eventually rapidly realized partial nitrification.

关 键 词：低强度超声波 声能密度 短程硝化 快速启动 动力学 

分 类 号：X703.1[环境科学与工程—环境工程]