使用平板膜同时进行污泥浓缩和还原过程中溶解有机物的特征及其在膜堵塞中的作用。

IF 8.1 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES
Xuefeng Zhu , Zexian Fang , Shicai Cheng , Guangyin Zhen , Xueqin Lu , Hongbo Liu , Jing Qi , Zhichao Wu , Xuedong Zhang , Zhen Zhou , Mika Sillanpää
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引用次数: 0

摘要

使用平板膜的四个平行污泥浓缩和减量同步反应器对污泥进行好氧消化,以探索溶解有机物的特性及其膜堵塞效应。在使用平板膜进行污泥浓缩和减量(MSTR)的最初 8 天内,观察到出水中腐殖酸和类似于可溶性微生物副产物的化合物的浓度明显增加。随后,腐殖酸含量呈波动趋势,可溶性微生物副产物类物质的含量逐渐下降。在最初的 8 天之后,毛细管抽吸时间(CST)从大约 400 秒上升到 800 秒以上,粘度从 20 mPa s 上升到 38 mPa s,膜阻力从大约 6.0+11 m-1 上升到大约 9.0e+11 m-1。这种现象可归因于尺寸与膜孔径相近的污物堵塞了孔隙,导致大分子和较大颗粒的积累和沉积,形成凝胶体层和滤饼层。各种微生物之间的相互作用产生了功能模块,共同影响着 MSTR 内溶解有机物的分布和特性。这些微生物各自发挥新陈代谢作用,并相互影响,形成协同和抑制机制。值得注意的是,微生物之间的协同作用占主导地位,最终提高了系统内的污水质量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Characteristics of dissolved organic matter and their role in membrane fouling during simultaneous sludge thickening and reduction using flat-sheet membranes

Characteristics of dissolved organic matter and their role in membrane fouling during simultaneous sludge thickening and reduction using flat-sheet membranes
Four parallel simultaneous sludge thickening and reduction reactors using flat-sheet membranes were employed for the aerobic digestion of sludge to explore the characteristics of dissolved organic matter and its membrane fouling effect. During the initial 8 days of using flat-sheet membranes for simultaneous sludge thickening and reduction (MSTR), a notable increase was observed in the concentrations of humic acids and compounds that resemble soluble microbial by-products in the effluent. Subsequently, a fluctuating trend in humic acid levels ensued, accompanied by a gradual decline in soluble microbial by-product-like substances. Post the initial 8-day period, the capillary suction time (CST) rose from approximately 400 s to over 800 s, the viscosity increased from 20 mPa s to 38 mPa s, and the membrane resistance increased from roughly 6.0e+ 11 m−1 to approximately 9.0e+11 m−1. This phenomenon can be attributed to the clogging of pores by foulants whose size is similar to that of the membrane pores leading to the accumulation and deposition of macromolecules and larger particulates forming gel layers and cake layers. The interplay among diverse microorganisms engenders functional modules, collectively influencing the distribution and characteristics of dissolved organic matter within the MSTR. These microorganisms exert their metabolic effects individually and interact reciprocally, creating synergistic and inhibitory mechanisms. Notably, the synergistic interactions among microorganisms predominated, culminating in an enhanced effluent quality within the system.
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来源期刊
Chemosphere
Chemosphere 环境科学-环境科学
CiteScore
15.80
自引率
8.00%
发文量
4975
审稿时长
3.4 months
期刊介绍: Chemosphere, being an international multidisciplinary journal, is dedicated to publishing original communications and review articles on chemicals in the environment. The scope covers a wide range of topics, including the identification, quantification, behavior, fate, toxicology, treatment, and remediation of chemicals in the bio-, hydro-, litho-, and atmosphere, ensuring the broad dissemination of research in this field.
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