Chemical Industry and Engineering Progress ›› 2019, Vol. 38 ›› Issue (9): 4335-4341.DOI: 10.16085/j.issn.1000-6613.2018-2498

• Resources and environmental engineering • Previous Articles     Next Articles

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

Shuchang HUANG1,2,Yichun ZHU1,2(),Zhang ZHANG1,2,Xin LI1,2,Shuai TIAN1,2,Junfeng LIAN1,2,Zuwen LIU1,2   

  1. 1. Research Center for Water Quality Security Technology at Ganjiang River Basin, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
    2. School of Architectural and Surveying Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
  • Received:2018-12-29 Online:2019-09-05 Published:2019-09-05
  • Contact: Yichun ZHU

声能密度对短程硝化启动及氨氮去除动力学的影响

黄书昌1,2,朱易春1,2(),章璋1,2,李鑫1,2,田帅1,2,连军锋1,2,刘祖文1,2   

  1. 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
  • 通讯作者: 朱易春
  • 作者简介:黄书昌(1994—),男,硕士研究生,研究方向为污水生物处理技术。
  • 基金资助:
    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)

Abstract:

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.

Key words: low-intensity ultrasonic treatment, ultrasonic density, partial nitrification, rapid start-up, kinetics

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。

关键词: 低强度超声波, 声能密度, 短程硝化, 快速启动, 动力学

CLC Number: 

京ICP备12046843号-2;京公网安备 11010102001994号
Copyright © Chemical Industry and Engineering Progress, All Rights Reserved.
E-mail: hgjz@cip.com.cn
Powered by Beijing Magtech Co. Ltd