摘要
微塑料(MPs)在城市污水处理厂中广泛存在,严重影响了厌氧消化(AD)过程.本研究深入探讨了聚氯乙烯微塑料(PVC-MPs)对AD的影响,并评估了污泥煤矸石基生物炭(SCBC)缓解这种抑制的潜力.同时,通过分析微生物群落演变,揭示了其作用机制.结果显示,当PVC-MPs的浓度达到0.1 g·g^(-1)时,对AD抑制效果最显著,化学需氧量(COD)的去除率和甲烷含量分别下降了17.5%和26.7%.然而,当SCBC添加量为1.0 g·L^(-1)时,其缓解抑制作用最为明显,COD去除率和甲烷含量分别提升了8.3%和118.8%,并且pH恢复至适宜微生物生长的范围,稳定在6.8~7.2之间.高通量测序技术揭示,SCBC能够富集甲烷鬃菌属、甲烷杆菌属、甲烷八叠球菌属、绿弯菌门、变形菌门、拟杆菌门的生长,相对丰度分别提升了19.0%、29.3%、18.9%、76.1%、21.9%、10.8%.综上所述,SCBC为缓解微塑料在AD过程中造成的抑制提供了一种创新方法,同时也为污泥和煤矸石的资源化利用开辟了一种新途径.
Microplastics(MPs)are widely present in municipal wastewater treatment plants,significantly affecting the anaerobic digestion(AD)process.This study systematically investigated the inhibitory effects of polyvinyl chloride microplastics(PVC-MPs)on AD and evaluated the potential of sludge coal gangue-based biochar(SCBC)to mitigate these effects.Furthermore,the microbial community evolution was elucidated through highthroughput sequencing.The results indicated that when the PVC-MPs concentration reached 0.1 g·g^(-1),AD inhibition was most pronounced,with the chemical oxygen demand(COD)removal rate and methane content decreasing by 17.5% and 26.7%,respectively.However,when the SCBC dosage was 1.0 g·L^(-1),the optimal mitigation rate was achieved,leading to an 8.3% increase in COD removal efficiency and a 118.8% enhancement in methane production.Additionally,SCBC stabilized the pH within a favorable range for microbial growth(6.8~7.2).High-throughput sequencing analysis revealed that SCBC facilitated the enrichment of Methanobrilla,Methanobacterium,Methanococci,Crutarobacteria,Proteobacteria,and Bacteroidetes by 19.0%,29.3%,18.9%,76.1%,21.9%,and 10.8%,respectively.In summary,this study demonstrates that SCBC provides an innovative strategy to alleviate microplastic-induced inhibition in the AD process,offering a sustainable approach for the resource utilization of sludge and coal gangue.
作者
贾克青
侯雅欣
马俊
王鹤姝
侯凯玉
范晓军
端允
JIA Keqing;HOU Yaxin;MA Jun;WANG Heshu;HOU Kaiyu;FAN Xiaojun;DUAN Yun(School of Environment and Ecology,Taiyuan University of Technology,Jinzhong 030600)
出处
《环境科学学报》
北大核心
2025年第7期351-360,共10页
Acta Scientiae Circumstantiae
基金
国家自然科学基金面上项目(No.52170045)
中央引导地方发展科技专项(No.YDZX2023024)
山西省重点研发计划项目(No.202102130501008)。
关键词
PVC-MPs
厌氧消化
污泥煤矸石基生物炭
微生物群落
抑制与缓解
PVC-MPs
anaerobic digestion
sludge-coal waste biochar
microbial community
inhibition and mitigation translate into
作者简介
贾克青(1999-),女,E-mail:keqing5299@163.com;端允,E-mail:duanyun@tyut.edu.cn。
