聚乙烯微塑料对污泥中高温厌氧消化的影响

甄昭淦; 苏阳; 罗竣潇; 安彤; 陈瑶; 苟敏

doi:10.13205/j.hjgc.202304012

聚乙烯微塑料对污泥中高温厌氧消化的影响

doi: 10.13205/j.hjgc.202304012

四川大学建筑与环境学院, 成都 610065

基金项目:

国家自然科学基金面上项目(52070135)

详细信息

作者简介:
甄昭淦,男,本科,主要研究方向为环境工程微生物。3170232953@qq.com

通讯作者:
苟敏,女,博士,博士生导师,主要研究方向为环境工程微生物。goumin@scu.edu.cn

计量
- 文章访问数: 70
- HTML全文浏览量: 7
- PDF下载量: 9
- 被引次数: 0
出版历程
- 收稿日期: 2022-05-26
- 网络出版日期: 2023-05-26
- 刊出日期: 2023-04-01

EFFECTS OF POLYETHYLENE MICROPLASTICS ON MESOPHILIC AND THERMOPHILIC ANAEROBIC DIGESTION OF SLUDGE

College of Architecture and Environment, Sichuan University, Chengdu 610065, China

摘要

摘要: 城市污水中的微塑料被大量截留在污泥中,可能会影响后续的污泥厌氧消化过程,但已有的相关报道较少。以聚乙烯(PE)微塑料为研究对象,利用批次实验考察了不同浓度 PE 微塑料对污泥中温(37 ℃)和高温(55 ℃)厌氧消化体系性能的影响,定期测定产甲烷量、挥发性脂肪酸(VFAs)等理化指标,并用荧光法测定微生物的辅酶F₄₂₀活性。结果表明:中温条件下,PE微塑料对污泥厌氧消化性能无明显影响;高温条件下,PE微塑料对污泥厌氧消化具有明显的抑制作用。浓度为1,10,100 mg/L的PE微塑料,导致累计甲烷产量分别降低了3.81%、3.27%和9.72%;100 mg/L的PE微塑料使消化反应末期(第28 天)出现了丙酸累积[(400±19) mg/L];荧光观察结果表明,PE微塑料对高温体系的作用可能源于辅酶F₄₂₀活性下降,进而导致氢营养型产甲烷途径的抑制。因此,污泥的高温厌氧消化更容易受到PE微塑料的影响。
- 微塑料 /
- 聚乙烯 /
- 污泥 /
- 厌氧消化 /
- 氢营养型产甲烷途径
Abstract: A large number of microplastics (MPs) in urban sewage are trapped in the sludge, which may affect the subsequent anaerobic digestion of sludge. In this study, polyethylene (PE) MPs with different concentrations were used to investigate their effects on the performance of mesophilic (37 ℃) and thermophilic (55 ℃) anaerobic digestion of sludge using batch test. Physical and chemical indicators including gas production and volatile fatty acids (VFAs) were quantitatively monitored. The coenzyme F₄₂₀ activity of microorganisms was evaluated by fluorescence observation. The results showed that PE MPs have no significant effect on the mesophilic anaerobic digestion of sludge, while they have obvious inhibitory effect on thermophilic anaerobic digestion of sludge. For the thermophilic system, when the addition of PE MPs was 1 mg/L, 10 mg/L and 100 mg/L, the cumulative production of CH₄ decreased by 3.81%, 3.27% and 9.72%, respectively; 100 mg/L PE MPs caused the accumulation of propionic acid [(400±19) mg/L] at the end of the reaction (the 28th day). According to the fluorescence results, the effect of PE microplastics on the thermophilic system may be caused by the decrease of coenzyme F₄₂₀ activity which leads to the inhibition of the hydrogenotrophic methanogenesis pathway. Therefore, thermophilic anaerobic digestion is more easily affected by PE MPs in the sludge.
- microplastics /
- polyethylene /
- sludge /
- anaerobic digestion /
- hydrogenotrophic methanogenesis pathway

HTML全文

参考文献(13)

[1]	PENG G Y, XU P, ZHU B S, et al. Microplastics in freshwater river sediments in Shanghai, China: a case study of risk assessment in mega-cities[J]. Environmental Pollution, 2018, 234: 448-456.
[2]	梁帅, 韩冰, 牛泽普, 等. 淡水中微塑料的来源、迁移途径及生态毒理效应综述[J]. 环境工程, 2021, 39(12): 1-9 , 70.
[3]	白濛雨, 赵世烨, 彭谷雨, 等. 城市污水处理过程中微塑料赋存特征[J]. 中国环境科学, 2018, 38(5): 1734-1743.
[4]	李小伟, 纪艳艳, 梅庆庆, 等. 污水处理厂污水和污泥中微塑料的研究展望[J]. 净水技术, 2019, 38(7): 13-22 , 84.
[5]	ZHANG X L, CHEN J X, LI J, et al. The removal of microplastics in the wastewater treatment process and their potential impact on anaerobic digestion due to pollutants association[J]. Chemosphere, 2020, 251:126360.
[6]	PENG G Y, ZHU B S, YANG D Q, et al. Microplastics in sediments of the Changjiang Estuary, China[J]. Environmental Pollution, 2017, 225: 283-290.
[7]	MAHON A M, O’CONNELL B, HEALY M G, et al. Microplastics in sewage sludge: effects of treatment[J]. Environmental science & technology, 2017, 51(2): 810-818.
[8]	MINTENIG S M, INT-VEEN I, LODER M G J, et al. Identification of microplastic in effluents of waste water treatment plants using focal plane array-based micro-Fourier-transform infrared imaging[J]. Water Research, 2017, 108: 365-372.
[9]	刘亚利, 张宏伟, 康晓荣. 微塑料对污泥厌氧消化的影响和机理[J]. 化工进展, 2022, 41(9): 5037-5046.
[10]	ZHANG J J, ZHAO M X, LI C, et al. Evaluation the impact of polystyrene micro and nanoplastics on the methane generation by anaerobic digestion[J]. Ecotoxicology and Environmental Safety, 2020, 205:111095.
[11]	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.
[12]	江晓影, 刘泳汐, 秦艳, 等. 聚丙烯微塑料对污泥厌氧消化效能作用影响[J]. 中国环境科学, 2021, 41(5): 2252-2257.
[13]	江晓影. 微塑料对污泥厌氧消化效能及抗生素抗性基因消长规律的影响[D]. 上海:东华大学, 2021. [15] 高军,陈莹莹,李建. 氨氮浓度对剩余污泥高温固态厌氧消化的影响[J].现代农业科技,2013(3):252-253, 255. [16] 周旭,闵力,赵圣国, 等. 高通量测序技术在瘤胃产甲烷菌群研究中的应用[J].家畜生态学报, 2018, 39(5): 1-5, 86. [17] WEI W, HUANG Q S, SUN J, et al. Revealing the mechanisms of polyethylene microplastics affecting anaerobic digestion of waste activated sludge[J]. Environmental Science & Technology, 2019, 53(16): 9604-9613. [18] 任南琪, 赵丹, 陈晓蕾, 等. 厌氧生物处理丙酸产生和积累的原因及控制对策[J]. 中国科学(B辑化学), 2002(1): 83-89. [19] 凡慧, 马诗淳, 黄艳, 等. 丙酸互营氧化菌群对厌氧消化过程中丙酸累积的调控研究进展[J].中国沼气, 2016, 34(4): 3-7. [20] SUVI B, MARIANNE R, PRASAD K, et al. Mesophilic and thermophilic anaerobic co-digestion of rendering plant and slaughterhouse wastes[J]. Bioresource Technology, 2012, 104: 28-36. [21] ZHANG Y T, WEI W, HUANG Q S, et al. Insights into the microbial response of anaerobic granular sludge during long-term exposure to polyethylene terephthalate microplastics[J]. Water Research, 2020, 179:115898. [22] TANG L Q, SU C Y, CHEN Y, et al. Influence of biodegradable polybutylene succinate and non-biodegradable polyvinyl chloride microplastics on anammox sludge: performance evaluation, suppression effect and metagenomic analysis[J]. Journal of Hazardous Materials, 2021, 401:123337. [23] TANG X, ZHANG B W, FAN C Z, et al. The presence of cationic polyacrylamide attenuated the toxicity of polyvinyl chloride microplastics to anaerobic digestion of waste activated sludge[J]. Chemical Engineering Journal, 2022, 427:131442. [24] 冯壮,陈子威,陈冰宇,等.基于城市污水处理厂微塑料处理技术及控制策略研究[J].环境科学与管理,2022,47(4):113-117. 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.[14]