H_(2)S气态基质对污泥生物沥滤处理效能的影响  

Effect of H_(2)S gaseous substrate on sludge bioleaching treatment efficiency

作　　者：常占坤 张弛[1] 苏冰琴[1,2] 张聪政 王健 权晓慧 CHANG Zhankun;ZHANG Chi;SU Bingqin;ZHANG Congzheng;WANG Jian;QUAN Xiaohui(School of Environmental Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China;Municipal Engineering Graduate Education Innovation Center of Shanxi Province,Taiyuan 030024,Shanxi,China;Shanxi Province Installation Group Co.,Ltd.,Taiyuan 030024,Shanxi,China)

机构地区：[1]太原理工大学环境科学与工程学院,山西太原030024 [2]山西省市政工程研究生教育创新中心,山西太原030024 [3]山西省安装集团股份有限公司,山西太原030024

出　　处：《化工进展》2023年第5期2733-2743,共11页Chemical Industry and Engineering Progress

基　　金：山西省社会发展科技攻关计划(201803D31039);山西省国际科技合作计划(201803D421098)。

摘　　要：采用H_(2)S作为污泥生物沥滤的部分替代营养底物,探究了不同的H_(2)S负荷对生物沥滤处理效能和群落动态的影响。实验考察了生物沥滤过程中pH、ORP、重金属去除率及CST的变化,并进行了群落多样性分析。结果表明:通入气体流量为2mL/min、负荷50mL/L的H_(2)S,能显著加快生物沥滤进程,提高污泥体系中pH的下降速率,保持更高的氧化还原电位。H_(2)S的加入不仅改善了脱水性能,CST加快了35.8s,而且对重金属的浸出也有显著的效果,Ni、Pb、Cr的去除率分别提高了18.35%、21.22%、13.07%,同时促进了各种重金属形态向易溶态的转化。电镜结果显示H_(2)S的加入促进了优势菌群繁殖,并使污泥颗粒变大且紧实。高通量测序显示,H_(2)S气态基质的加入强化了污泥生物沥滤处理效能,加速了污泥体系中的物种数、菌群丰度、群落多样性的减小趋势,促进变形菌门成为优势菌门,嗜酸菌属成为优势菌属。H_(2)S was used as the partially alternative nutrient substrate for sludge bioleaching,and the effects of H_(2)S load on bioleaching treatment efficiency and community diversity were studied.The changes of pH,ORP,heavy metal removal rate and CST were examined,and the community diversity was analyzed.The results showed that H_(2)S load of 50mL/L with gas flow of 2mL/min could significantly accelerate the bioleaching process,improve the decline rate of pH and maintain a higher oxidation reduction potential in the sludge system.The addition of H_(2)S improved dewaterability with CST shortened by 35.8s,had significant effects on heavy metal leaching with the removal rate of Ni,Pb,and Cr increasing by 18.35%,21.22%,and 13.07%respectively,and promoted the conversion of various heavy metal forms to the easily soluble state.The SEM results showed that H_(2)S promoted the reproduction of dominant microflora and made the sludge particles larger and compact.High-throughput sequencing showed that the addition of H_(2)S gaseous substrate strengthened the efficiency of sludge bioleaching treatment,accelerated the trend reducing the number of species,microflora abundance and community diversity in the sludge system,and promoted Proteobacteria as the dominant phylum and Acidithiobacillu as the dominant genus.

关 键 词：H_(2)S 生物沥滤 污泥处理 重金属 脱水性能 群落多样性 

分 类 号：X705[环境科学与工程—环境工程] X703.1