Fe3O4强化厌氧动态膜生物反应器处理黑水性能与机制OA
Enhancing performance and mechanisms of anaerobic dynamic membrane bioreactor for black water treatment using Fe3O4
厌氧消化技术因其低能耗和高效的有机物降解能力,已广泛应用于污水处理.然而,有机物转化率低、处理效率受限以及膜污染等问题,严重影响了厌氧动态膜生物反应器(anaerobic dynamic membrane bioreactor,AnDMBR)的推广应用.因此,为了寻找有效的技术手段来优化反应器性能、减缓膜污染并提高处理效率,构建了两组AnDMBR反应器,旨在探讨四氧化三铁(Fe3O4)对AnDMBR的性能影响,特别是在产甲烷效率、膜污染、电子传递效率和关键酶活性、微生物群落结构等方面的改善作用.实验结果表明,Fe3O4的加入显著提高了COD去除率,在负荷为1.2g COD/(L·d)时,R2组的COD去除率达到97.14%±2.22%.此外,Fe3O4的加入有效增强了产甲烷能力,在有机负荷为1.2g COD/(L·d)时,R2组的比产甲烷率为(157.04±4.70)mL CH4/g CODremoved,表现优于对照组.Fe3O4还通过减缓膜污染的进程,降低了跨膜压差(transmembrane pressure difference,TMP),从而提高了膜的过滤性能.进一步的电子传递效率测试显示,Fe3O4的加入显著提高了污泥电导率和电子传递活性,促进了微生物间的直接电子传递(direct electron transfer,DIET).微生物群落分析表明,Fe3O4的添加改变了反应器内微生物的组成,促进了电活性微生物和产甲烷菌的富集,增强了厌氧消化系统的稳定性和处理效率.通过分析Fe3O4在反应器中的功能机制,评估了其作为外源导电介质对厌氧动态膜反应器的优化潜力,旨在为提高污水处理效率和厌氧消化性能提供理论依据和技术支持.
Anaerobic digestion technology has been widely used in wastewater treatment because of its low energy consumption and high efficiency of organic matter degradation.However,the low conversion of organic matter,limited treatment efficiency and membrane pollution have seriously affected the popularization and application of anaerobic dynamic membrane bioreactor(AnDMBR).Therefore,in order to find effective technical means to optimize reactor performance,mitigate membrane contamination,and improve treatment efficiency,two sets of AnDMBR reactors were constructed.The purpose was to investigate the effects of Fe3O4 on the performance of AnDMBR,especially in methanogenesis efficiency,membrane pollution,electron transport efficiency,key enzyme activity,microbial community structure and other aspects of improvement.The experimental results showed that the addition of Fe3O4 significantly improved the COD removal rate.When the load was 1.2g COD/(L·d),the COD removal rate in the R2 group reached 97.14%±2.22%.In addition,Fe3O4 significantly enhanced methanogenic capacity.At an organic load of 1.2g COD/(L·d),the specific methanogenic rate in the R2 group was(157.04±4.70)mL CH4/g CODremoved and performed better than the control group.Fe3O4 also improved the filtration performance of the membrane by slowing the membrane fouling process and reducing the membrane's transmembrane pressure difference(TMP).Further electron transport efficiency tests showed that Fe3O4 significantly improved the conductivity and electron transport activity of the sludge,promoting direct electron transfer(DIET)between microorganisms.Microbial community analysis showed that the addition of Fe3O4 changed the composition of microorganisms in the reactor,promoted the enrichment of electroactive microorganisms and methanogens,and enhanced the stability and treatment efficiency of the anaerobic digestion system.By analyzing the functional mechanism of Fe3O4 in the reactor,the optimization potential of Fe3O4 as an exogenous conductive medium in the anaerobic dynamic membrane reactor was evaluated,in order to provide theoretical basis and technical support for improving the efficiency of wastewater treatment and anaerobic digestion.
潘伟亮;何秋宏;古励;何强;李勇;张浩程
重庆交通大学环境水利工程重庆市工程实验室,重庆 400074重庆交通大学环境水利工程重庆市工程实验室,重庆 400074三峡库区生态环境教育部重点实验室,重庆 400045三峡库区生态环境教育部重点实验室,重庆 400045重庆川卓环境科技有限公司,重庆 400021重庆川卓环境科技有限公司,重庆 400021
资源环境
四氧化三铁厌氧动态膜电子传递微生物
triiron tetraoxide(Fe3O4)anaerobic dynamic membraneelectron transportmicroorganism
《化工进展》 2026 (4)
2443-2452,10
重庆市技术创新与应用发展专项重点项目(CSTB2022TIAD-KPX0201)重庆市自然科学基金(CSTB2022NSCQ-MSX1438)重庆市研究生联合培养基地项目(JDLHPYJD2024004)重庆交通大学研究生科创基金(2024S0066,2024S0054).
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