剩余污泥厌氧发酵和微塑料的相互作用机制

郑晓英; 杨珊珊; 杨萌萌; 赵志琳; 张会杰; 韩宗朔; 周超

doi:10.13205/j.hjgc.202304013

剩余污泥厌氧发酵和微塑料的相互作用机制

doi: 10.13205/j.hjgc.202304013

1. 河海大学环境学院浅水湖泊综合治理与资源开发教育部重点实验室, 南京 210098;
2. 中机国际工程设计研究院有限责任公司华东分院, 南京 210049

基金项目:

国家自然科学基金项目(51678214)

国家重点研发计划项目(2016YFC0400804)

江苏高校优势学科建设工程资助项目(PAPD)

详细信息

作者简介:
郑晓英(1976-),女,教授,主要研究方向为污水资源化利用理论与技术。zhxyqq@hhu.edu.cn

通讯作者:
杨珊珊(1999-),女,硕士研究生,主要研究方向为污水资源化利用理论与技术。Yangss99@163.com

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出版历程
- 收稿日期: 2022-08-03
- 网络出版日期: 2023-05-26
- 刊出日期: 2023-04-01

INTERACTION BETWEEN ANAEROBIC FERMENTATION OF WASTE ACTIVATED SLUDGE AND MICROPLASTICS

1. Key Laboratory of Integrated Regulation & Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China;
2. East China Branch, China Machinery International Engineering Design & Research Institute Co., Ltd., (CMIE), Nanjing 210049, China

摘要

摘要: 以聚乙烯(PE)微塑料作为典型微塑料,在恒定碱性条件(pH=10)和非恒定碱性(初始pH=10)条件下,研究PE和剩余污泥厌氧发酵之间的相互作用机制。结果表明:在污泥厌氧发酵初始阶段,PE对产酸有明显的促进作用,而在后期呈相反趋势。厌氧发酵60 d时,恒定碱性条件下,投加PE组(R2)的VFAs产量与空白组R1相比降低了31.46%;在非恒定碱性条件下,投加PE组(R4)中VFAs产量与空白组R3相比降低了15.78%,说明PE长期胁迫对污泥厌氧发酵VFAs的产生有抑制作用。同时,PE会刺激微生物分泌更多的EPS(主要成分为蛋白质),降低Zeta电位并破坏EPS的结构。另外,综合扫描电子显微镜(SEM)、拉曼光谱、傅里叶变换红外光谱(FTIR)、X射线光电子能谱(XPS)、水接触角分析微塑料的性质特征发现,由于环境条件和微生物活动的影响,污泥厌氧发酵会导致PE老化,且非恒定碱性条件下微塑料的老化速率更快。
- 聚乙烯(PE) /
- 剩余污泥 /
- 厌氧发酵 /
- 产酸 /
- 老化
Abstract: The interaction mechanism between the typical microplastic of polyethylene (PE) and waste activated sludge anaerobic fermentation was studied under constant alkaline condition (constant pH=10) and unsteady alkaline (initial pH=10) condition. The results showed that PE had a significant contribution to acid production in the initial stage of anaerobic sludge fermentation, and showed the opposite trend in the later period. Under constant alkaline condition, compared to the blank group(R1), the VFAs production in the PE group (R2) decreased by 31.46%; under unsteady alkaline fermentation, compared to the blank group(R3), the VFAs production in the PE group (R4) decreased by 15.78%, indicating that PE had an inhibitory effect on the production of VFAs in anaerobic fermentation. Simultaneously, PE stimulated microorganisms to secrete more EPS (mainly proteins), decreased the zeta potential and disrupted the structure of EPS. In addition, the microplastic samples were characterized by SEM, Raman spectroscope, FTIR, XPS, and contact angle meter. The analysis results revealed that anaerobic fermentation of waste activated sludge system led to PE ageing due to environmental conditions and microbial activities, and the ageing rate of microplastics was faster under unsteady alkaline condition.
- polyethylene (PE) /
- waste activated sludge /
- anaerobic fermentation /
- acid production /
- aging

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参考文献(32)

[1]	林旭萌, 宿程远, 吴淑敏, 等. 微塑料PES与2,4-DCP复合污染对厌氧污泥胞外聚合物与微生物群落的影响[J]. 环境科学, 2021, 42(4): 1946-1955.
[2]	LI M, LIU Y, XU G H, et al. Impacts of polyethylene microplastics on bioavailability and toxicity of metals in soil[J]. Science of the Total Environment, 2021, 760: 144037.
[3]	WANG F, WONG C S, CHEN D, et al. Interaction of toxic chemicals with microplastics: a critical review[J]. Water Research, 2018, 139: 208-219.
[4]	中华人民共和国国务院办公厅. 新污染物治理行动方案[EB/OL]. 2022-05-24.http://www.gov.cn/zhengce/zhengceku/2022-05/24/content_5692059.htm.
[5]	PETROODYS S A, HASHEMI S H, VAN GESTEL C A M. Transport and accumulation of microplastics through wastewater treatment sludge processes[J]. Chemosphere, 2021, 278: 130471.
[6]	LIU X N, YUAN W K, DI M X, et al. Transfer and fate of microplastics during the conventional activated sludge process in one wastewater treatment plant of China[J]. Chemical Engineering Journal, 2019, 362: 176-182.
[7]	SUN J, DAI X H, WANG Q L, et al. Microplastics in wastewater treatment plants: detection, occurrence and removal[J]. Water Research, 2019, 152: 21-37.
[8]	LI X W, CHEN L B, MEI Q Q, et al. Microplastics in sewage sludge from the wastewater treatment plants in China[J]. Water Research, 2018, 142: 75-85.
[9]	ZHANG Z Q, CHEN Y G. Effects of microplastics on wastewater and sewage sludge treatment and their removal: a review[J]. Chemical Engineering Journal, 2020, 382: 122955.
[10]	LI X W, MEI Q Q, CHEN L B, et al. Enhancement in adsorption potential of microplastics in sewage sludge for metal pollutants after the wastewater treatment process[J]. Water Research, 2019, 157: 228-237.
[11]	FANG W, ZHANG X D, ZHANG P Y, et al. Overview of key operation factors and strategies for improving fermentative volatile fatty acid production and product regulation from sewage sludge[J]. Journal of Environmental Sciences, 2020, 87(1): 93-111.
[12]	CHEN Y, RUHYADI R, HUANG J J, et al. Comprehensive comparison of acidic and alkaline anaerobic fermentations of waste activated sludge[J]. Bioresource Technology, 2021, 323: 124613.
[13]	PANG H L, JIAO Q Q, HE J G, et al. Enhanced short-chain fatty acids production through a short-term anaerobic fermentation of waste activated sludge: synergistic pretreatment of alkali and alkaline hydrolase blend[J]. Journal of Cleaner Production, 2022, 342: 130954.
[14]	LI L, GENG S X, LI Z Y, et al. Effect of microplastic on anaerobic digestion of wasted activated sludge[J]. Chemosphere, 2020, 247: 125874.
[15]	WEI W, HUANG Q S, SUN J, et al. Polyvinyl chloride microplastics affect methane production from the anaerobic digestion of waste activated sludge through leaching toxic bisphenol-A[J]. Environmental Science & Technology, 2019, 53(5): 2509-2517.
[16]	SONG Y K, HONG S H, JANG M, et al. Combined effects of UV exposure duration and mechanical abrasion on microplastic fragmentation by polymer type[J]. Environmental Science & Technology, 2017, 51(8): 4368-4376.
[17]	LU B, JIANG C, CHEN Z, et al. Fate of polylactic acid microplastics during anaerobic digestion of kitchen waste: insights on property changes, released dissolved organic matters, and biofilm formation[J]. Science of the Total Environment, 2022, 834: 155108.
[18]	ALIMI O S, FARNER BUDARZ J, HERNANDEZ L M, et al. Microplastics and nanoplastics in aquatic environments: aggregation, deposition, and enhanced contaminant transport[J]. Environmental Science & Technology, 2018, 52(4): 1704-1724.
[19]	杨明明, 刘子涵, 周杨, 等. 厌氧氨氧化颗粒污泥 EPS 及其对污泥表面特性的影响[J]. 环境科学, 2019,40(5): 2341-2348.
[20]	LI Q L, WU J T, ZHAO X P, et al. Separation and identification of microplastics from soil and sewage sludge[J]. Environmental Pollution, 2019, 254: 113076.
[21]	杨波,贾丽娟,徐辉,等. 投加颗粒活性炭和二氧化锰对剩余污泥厌氧消化的影响[J]. 环境科学, 2020, 41(4): 1816-1824.
[22]	CHEN H B, TANG M G, YANG X, et al. Polyamide 6 microplastics facilitate methane production during anaerobic digestion of waste activated sludge[J]. Chemical Engineering Journal, 2021, 408: 127251.
[23]	FENG Q, GE R, SUN Y Q, et al. Revealing hydrodynamic effects on flocculation performance and surface properties of sludge by comparing aeration and stirring systems via computational fluid dynamics aided calculation[J]. Water Research, 2020, 172: 115500.
[24]	CHEN H B, ZOU M, ZHOU Y Y, et al. Monitoring the nitrous oxide emissions and biological nutrient removal from wastewater treatment: impact of perfluorooctanoic acid[J]. Journal of Hazardous Materials, 2021, 402: 123469.
[25]	JIA X, WEI J, ZHANG J, et al. Changes of extracellular proteins and polysaccharides in phenol degradation by anaerobic microorganism[J]. China Water & Wastewater, 2018, 34(13): 20-25.
[26]	JIAO Y M, ZOU M, YANG X, et al. Perfluorooctanoic acid triggers oxidative stress in anaerobic digestion of sewage sludge[J]. Journal of Hazardous Materials, 2022, 424: 127418.
[27]	王浩宇, 苏本生,等. 好氧污泥颗粒化过程中Zeta电位与EPS的变化特性[J]. 环境科学, 2012, 33(5): 1614-1620.
[28]	DU W, WANG F, FANG S Y, et al. Antimicrobial PCMX facilitates the volatile fatty acids production during sludge anaerobic fermentation: insights of the interactive principles, microbial metabolic profiles and adaptation mechanisms[J]. Chemical Engineering Journal, 2022,446: 137339.
[29]	LI X W, CHEN L B, JI Y Y, et al. Effects of chemical pretreatments on microplastic extraction in sewage sludge and their physicochemical characteristics[J]. Water Research, 2020, 171: 115379.
[30]	ARIZA-TARAZONA M C, VILLARREAL-CHIU J F, HERNÁNDEZ-LÓPEZ J M, et al. Microplastic pollution reduction by a carbon and nitrogen-doped TiO₂: effect of pH and temperature in the photocatalytic degradation process[J]. Journal of Hazardous Materials, 2020, 395: 122632.
[31]	LÓPEZ A D F, TRUCHET D M, RIMONDINO G N, et al. Microplastics and suspended particles in a strongly impacted coastal environment: composition, abundance, surface texture, and interaction with metal ions[J]. Science of the Total Environment, 2021, 754: 142413.
[32]	YAN W, HAMID N, DENG S, et al. Individual and combined toxicogenetic effects of microplastics and heavy metals (Cd, Pb, and Zn) perturb gut microbiota homeostasis and gonadal development in marine medaka (Oryzias melastigma)[J]. Journal of Hazardous Materials, 2020, 397: 122795.