Efficient carbon/phosphorus recovery from sludge anaerobic fermentation with recyclable MOF-based conductive materials activating sodium persulfate

IF 11.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Resources Conservation and Recycling Pub Date : 2025-06-10 DOI:10.1016/j.resconrec.2025.108449

Long Chen , Jianming Zhu , Ziwei Lin , Xiaohan Zhi , Zimu Qin , Hongtao Zhu

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引用次数: 0

Abstract

Recovering volatile fatty acids (VFAs) and phosphorus (P) from waste activated sludge (WAS) via anaerobic fermentation (AF) is hindered by several challenges, including low sludge disintegration efficiency and limited P release and recovery. This study addresses these challenges by incorporating a novel and recyclable composite material, FeM@CS, alongside sodium persulfate (PS) in AF. The activation of PS by FeM@CS generates ·SO₄⁻, ·OH, and ¹O₂, which enhance WAS disintegration by a 706.54 % increase in soluble chemical oxygen demand and a 280.90 % increase in VFAs yield. The unique conductive structure of FeM@CS, facilitates electron (e⁻) and proton (H⁺) transfer between enriched functional bacteria (e.g., Firmicutes) on its surface, boosting bacterial metabolism and enzyme activity. Nearly 100 % of released P were adsorbed by 7 g of FeM@CS. This study offering a novel strategy for the efficient resource recovery and the safe disposal of sludge through enhanced e⁻/H⁺ transfer pathways regulated by AF.

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利用可循环mof基导电材料活化过硫酸钠高效回收污泥厌氧发酵过程中的碳/磷

通过厌氧发酵（AF）从废活性污泥（WAS）中回收挥发性脂肪酸（VFAs）和磷(P)受到污泥分解效率低、P释放和回收有限等几个挑战的阻碍。本研究通过在AF中加入一种新型可回收复合材料FeM@CS和过硫酸钠（PS）来解决这些挑战。FeM@CS对PS的活化产生·SO4−、·OH和10o2，从而促进WAS的分解，使可溶性化学需氧量增加706.54%，VFAs产量增加280.90%。FeM@CS独特的导电结构，促进了电子（e−）和质子（H+）在其表面富集的功能细菌（如厚壁菌门）之间的转移，促进了细菌的代谢和酶的活性。7 g FeM@CS吸附了近100%的释放磷。本研究通过AF调控的e - /H+转移途径，为污泥的有效资源回收和安全处置提供了一种新的策略。

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来源期刊

Resources Conservation and Recycling 环境科学-工程：环境

CiteScore

22.90

自引率

6.10%

发文量

625

审稿时长

23 days

期刊介绍： The journal Resources, Conservation & Recycling welcomes contributions from research, which consider sustainable management and conservation of resources. The journal prioritizes understanding the transformation processes crucial for transitioning toward more sustainable production and consumption systems. It highlights technological, economic, institutional, and policy aspects related to specific resource management practices such as conservation, recycling, and resource substitution, as well as broader strategies like improving resource productivity and restructuring production and consumption patterns. Contributions may address regional, national, or international scales and can range from individual resources or technologies to entire sectors or systems. Authors are encouraged to explore scientific and methodological issues alongside practical, environmental, and economic implications. However, manuscripts focusing solely on laboratory experiments without discussing their broader implications will not be considered for publication in the journal.