Behavior and Biochemical Mechanism of High Iron Attapulgite Dosages Affecting Sewage Sludge Composting
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Published:2023-08-17
Issue:16
Volume:15
Page:12527
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ISSN:2071-1050
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Container-title:Sustainability
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language:en
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Short-container-title:Sustainability
Author:
Yu Zhaojing1, Wang Bin1, Jiang Xiaoya1, Zeng Weimin12, Yu Runlan12, Wu Xiaoyan1, Shen Li12, Wu Xueling12, Li Jiaokun12, Liu Yuandong12
Affiliation:
1. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China 2. Key Laboratory of Biometallurgy, Ministry of Education, Changsha 410083, China
Abstract
We first revealed the behavior and biochemical mechanism of high iron attapulgite (HIAP) and different dosages affecting sewage sludge (SS) composting. HS/TOC ratio increased, but HA/TOC and HA/FA ratios reduced with the increase in HIAP dose. High-dose HIAP promoted the formation of more HS by weak catalytic effect but could bind more FA than HA by strong adsorption effect to inhibit the polymerization of the adsorbed FA into HA. Mixing SS with HIAP and subsequent composting as two consecutive processes during HIAP-amended composting significantly influenced the species distribution of heavy metals (HMs) Cu, Zn, and Cr. Each process roughly contributed one-half to HMs passivation. The bioavailable fraction (BF) of HMs reduced with the increase of HIAP dose. HIAP dose greatly affected the microbial community. Both 1% and 5% HIAP treatments promoted Proteobacteria and Firmicutes, but 10% HIAP promoted Actinobacteriota and Bacteroidota. At the thermophilic phase, HIAP dose greatly affected core thermophilic microbial genera, which were significantly correlated to pile temperature and pH value. In the maturity stage, core microbial genera in different treatments were basically similar and closely correlated to the bioavailable fraction (BF) of HMs and HA, and the influence order was BF–Cr > BF–Cu > BF–Zn > HA. The optimal 5% HIAP dose was recommended.
Funder
National Key Research and Development Program of China National Natural Science Foundation of China Central Government Guides Local Science and Technology Development Fund Natural Science Foundation of Hunan
Subject
Management, Monitoring, Policy and Law,Renewable Energy, Sustainability and the Environment,Geography, Planning and Development,Building and Construction
Reference49 articles.
1. Heavy Metal Remediation in Sludge Compost: Recent Progress;Xiong;J. Renew. Mater.,2022 2. Microbial inoculants and struvite improved organic matter humification and stabilized phosphorus during swine manure composting: Multivariate and multiscale investigations;Li;Bioresour. Technol.,2022 3. Comparison of different municipal sewage sludge products for potential ecotoxicity;Borgulat;Arch. Environ. Prot.,2022 4. Bruni, C., Akyol, Ç., Cipolletta, G., Eusebi, A.L., Caniani, D., Masi, S., Colón, J., and Fatone, F. (2020). Decentralized community composting: Past, present and future aspects of Italy. Sustainability, 12. 5. Additives for reducing nitrogen loss during composting: A Review;Shan;J. Clean. Prod.,2021
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