生物转鼓工艺好氧同步处理工业废气中的SO_(2)和NO_(x)  

Simultaneous treatment of SO_(2)and NO_(x) in industrial waste gas by aerobic rotating drum biofilter

作　　者：蔡鲁祥[1,2] 沈家辰 黄梦霞 贯文瑶 毛芝娟 沙昊雷[1] CAI Luxiang;HEN Jiachen;HUANG Mengxia;GUAN Wenyao;MAO Zhijuan;SHA Haolei(Zhejiang Provincial Top Discipline of Biological Engineering(Level A),Zhejiang Wanli University,Ningbo 315100,hina;Collegeof Artsand Design,Ningbo University of Finance&Economics,Ningbo 315175,China)

机构地区：[1]浙江省“生物工程”一流学科,浙江万里学院,宁波315100 [2]宁波财经学院艺术设计学院,宁波315175

出　　处：《环境工程学报》2022年第4期1094-1101,共8页Chinese Journal of Environmental Engineering

基　　金：宁波市公益类科技计划项目(2019C50002,2021S143);2021年浙江省一流学科“生物工程”学生创新项目(CX2021030)。

摘　　要：为提升基于脱硫脱硝工艺的生物转鼓对工业废气中SO_(2)、NO_(x)的处理效果,在好氧条件下,分析了生物转鼓的启动过程、稳态下的生物相群落结构,考察了不同进气质量浓度下生物转鼓对SO_(2)、NO_(x)的处理效果和去除负荷,并探讨了生物转鼓同步脱硫脱硝过程中N和S的转化途径。结果表明:生物转鼓的启动挂膜需耗时约25 d;门水平的脱硫脱硝优势菌为变形菌门、拟杆菌门和绿弯菌门,这些菌总占比58%。在NO_(x)进气质量浓度低于800 mg·m^(-3)、SO_(2)进气质量浓度低于2850 mg·m^(-3)时,生物转鼓的同步脱硫脱硝效率高于90%;而当NO_(x)和SO_(2)进气质量浓度较高时,N和S会以NO_(3)^(-)和SO_(4)^(2)的形式富集在液相中。当NO_(x)进气质量浓度为1000 mg·m^(-3)、SO_(2)进气质量浓度为1200 mg·m^(-3)时,NO_(3)^(-)和SO_(4)^(2)可维持平衡。此时,生物转鼓达到最大N、S去除负荷,即最大NO_(x)-N去除负荷为11.81 mg·(L·h);、最大SO_(2)-S去除负荷为28.41 mg·(L·h)^(-1)。本研究可为生物转鼓好氧同步脱硫脱硝工艺的优化提供参考。In order to improve the treatment effect of rotating drum biofilter based on desulfurization and denitrification process on SO_(2)and NO_(x)in industrial waste gas,the start-up process of rotating drum biofilter and the biophase community structure in the steady state were analyzed under aerobic conditions.The treatment effect and removal load of rotating drum biofilter on SO_(2)and NO_(x)under different inlet mass concentrations were also investigated.The transformation of N and S in the synchronous desulfurization and denitrification process of the rotating drum biofilter was also discussed.The results showed that it took about 25 days to start and hang the membrance of the bio-drum.The dominant bacteria of desulfurization and denitrification at the phylum level were Proteobacteria,Bacteroidetes and Chloroflexi,which accounted for 58%in total.When the mass concentration of NO_(x)was lower than 800 mg·m^(-3)and the mass concentration of SO_(2)was lower than 2850mg·m^(-3),the simultaneous desulfurization and denitrification efficiency of the rotating drum biofilter was higher than 90%.However,when the mass concentration of SO_(2)and NO_(x)was high,N and S would be enriched in the liquid phase in the form of NO_(3)^(-)and SO_(4)^(2).When the inlet mass concentration of NO_(x)was 1000 mg·m^(-3),and the inlet mass concentration of SO_(2)was 1200 mg·m^(-3),NO_(3)^(-)and SO_(4)^(2)in the liquid phase maintained a balance At this point,the rotating drum biofilter realized the maximum removal loads of N and S,with the maximum NO_(x)-N removal load of 11.81 mg·(L·h)^(-1),and the maximum SO_(2)-S removal load of 28.41 mg·(L·h)^(-1).This study can provide reference for the optimization of bio-drum aerobic synchronous desulfurization and denitrification process.

关 键 词：生物转鼓 同步脱硫脱硝 好氧 N转化途径 S转化途径 

分 类 号：X512[环境科学与工程—环境工程]