Study on the effect of different foaming methods on nitrogen removal of slow-release carbon source matrix

摘要:

为解决传统缓释碳源材料释碳不稳定和脱氮速率慢的问题,以物理曝气发泡、双氧水(HO)、十二烷基硫酸钠(K12)3种发泡方式对玉米芯、聚己内酯(PCL)和菌悬液(B)为原料的有机缓释碳源基质进行改进,考察了不同发泡方式下改进缓释碳源的释碳性能、脱氮效果和脱氮速率.结果表明,3种改进型缓释碳源(曝气-B,HO-B,K12-B)在中(NO-N为10.00 mg/L)、高(NO-N为20.00 mg/L)质量浓度进水条件下的总氮平均去除率高于原基质,曝气-B缓释碳源基质释碳速率快、释碳稳定,在中、高质量浓度进水条件下总氮平均去除率分别为93.59%和87.34%,比原基质分别高6.38%和13.26%.基于反硝化动力学方程,曝气-B缓释碳源基质的最大比反硝化速率可达到3.06 mg/(L·h·g),从理论上证明了曝气-B缓释碳源基质可提高脱氮速率,为快速脱氮提供了一种新型碳源材料.

In order to solve the problems of unstable carbon release and slow nitrogen removal rate of traditional slow-release carbon source, the organic slow-release carbon source with corncob, polycaprolactone(PCL) and bacterial suspension(B)as materials was modified with aeration, hydrogen peroxide(HO) and sodium dodecyl sulfate(K12)as foaming agents, respectively. The performance of carbon release, denitrification effect and denitrification rate of the modified slow-release carbon source by different foaming methods were investigated. The results showed that when the influent NO-N concentration were medium(10.00 mg/L) and high(20.00 mg/L), the average removal rates of total nitrogen of the three modified carbon sources(aeration-B, HO-B, K12-B)were higher than that of the original substrate. The aeration-B showed the best carbon release performances of releasing rate and stability, the average total nitrogen removal rate of 93.59% and 87.34% in the condution of medium and high concentration, it was 6.38% and 13.26% higher than the original substrate, respectively. According to the denitrification kinetics, the maximum specific denitrification rate of aeration-B can reach 3.06 mg/(L·h·g), which demonstrated the aeration-B slow-release carbon source material can improve denitrification rate theoretically. This study provided a new carbon source material for rapid denitrification.

作者:
于鲁冀 黎亚辉 李廷梅 范鹏宇 彭赵旭 任昆阳

Yu Luji;Li Yahui;Li Tingmei;Fan Pengyu;Peng Zhaoxu;Ren Kunyang(College of Ecology and Environment;b.Research Center for Environmental Policy Planning&Assessment,Zhengzhou University,Zhengzhou 450001,China;College of Water Conservancy Science and Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区:
郑州大学生态与环境学院 郑州大学环境政策规划评价研究中心 水利科学与工程学院

出处:
《betway官方app 学报：自然科学版》 CAS 北大核心 2022年第5期87-93,F0002,共8页

Journal of Henan Normal University(Natural Science Edition)

基金:
国家水体污染控制与治理重大专项(2012ZX07024-001-004 2015ZX07204-002-004)。

关键词:
缓释碳源 反硝化脱氮 脱氮速率 反硝化动力学

slow-release carbon source denitrification nitrogen removal rate denitrification kinetic

分类号:
X52 [环境科学与工程—环境工程]

不同发泡方式改进缓释碳源基质脱氮效果研究.pdf