河南师范大学学报(自然科学版)

2022, v.50;No.226(05) 87-93+172

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不同发泡方式改进缓释碳源基质脱氮效果研究
Study on the effect of different foaming methods on nitrogen removal of slow-release carbon source matrix

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,Zhengzhou University;Research Center for Environmental Policy Planning & Assessment,Zhengzhou University;College of Water Conservancy Science and Engineering,Zhengzhou University;

摘要(Abstract):

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(H_2O_2)、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,H_2O_2-B,K12-B)在中(NO-_3-N为10.00 mg/L)、高(NO-_3-N为10.00 mg/L)、高(NO-_3-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(H_2O_2) 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-_3-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(H_2O_2) 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-_3-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, H_2O_2-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.

关键词(KeyWords): 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

Abstract:

Keywords:

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

作者(Authors): 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,Zhengzhou University;Research Center for Environmental Policy Planning & Assessment,Zhengzhou University;College of Water Conservancy Science and Engineering,Zhengzhou University;

DOI: 10.16366/j.cnki.1000-2367.2022.05.012

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