Enhanced in situ biodegradation of microplastics in sewage sludge using hyperthermophilic composting technology

Chen, Zhi; Zhao, Wenqi; Xing, Ruizhi; Xie, Shengjia; Yang, Xinggui; Cui, Peng; Lü, Jian; Liao, Hanpeng; Yu, Zhen; Wang, Shenghan; Zhou, Shungui

doi:10.1016/j.jhazmat.2019.121271

Cited by 249 publications

(68 citation statements)

References 40 publications

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“…During the composting process, the temperature of the compost pile can reach up to 70 °C [ 40 , 41 ]. Recently, thermophilic and hyperthermophile (>90 °C) composting processes showed effectiveness in degrading plastics [ 42 , 43 ]. However, some microplastics may have high thermal stability [ 44 ], and may not be degraded effectively without any thermochemical conversion processes like gasification, pyrolysis, etc.…”

Section: Resultsmentioning

confidence: 99%

“…[ 20 ]. Lime stabilization of digestate is often practiced for removing pathogens before land application [ 43 , 45 ]. It has been reported that lime application to digestate can disintegrate plastics into microplastics [ 43 , 45 ].…”

Section: Resultsmentioning

confidence: 99%

“…Lime stabilization of digestate is often practiced for removing pathogens before land application [ 43 , 45 ]. It has been reported that lime application to digestate can disintegrate plastics into microplastics [ 43 , 45 ]. The land application of digestate is considered one of the major routes for transmitting antimicrobial resistance genes (ARGs) to the environment [ 46 ], while microplastics can adsorb antibiotics and also serve as potential carriers for ARGs [ 47 , 48 ].…”

Section: Resultsmentioning

confidence: 99%

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Fate of disposable face masks in high-solids anaerobic digestion: Experimental observations and review of potential environmental implications

Albuquerque

Dhadwal

Dastyar

et al. 2021

Case Studies in Chemical and Environmental Engineering

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Fate of disposable face masks in high-solids anaerobic digestion: Experimental observations and review of potential environmental implications

Albuquerque

Dhadwal

Dastyar

et al. 2021

Case Studies in Chemical and Environmental Engineering

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“…Bosker, Bouwman, Brun, Behrens, and Vijver (2019) showed that germination rates of Lepidium sativum plant seeds decreased as a result of exposure to three sizes of plastics (50nm, 500nm, and 4800nm) due to blockage of pores within the seed capsule. Another study shows that the use of hyperthermophilic bacteria during wastewater sludge composting results in biodegradation of almost 44% of microplastics via bio‐oxidation (Chen et al, 2020). Thirty‐one agricultural fields that had previously undergone sludge application were studied for microplastic pollution.…”

Section: Analysis and Quantification Of Characteristicsmentioning

confidence: 99%

Residuals, sludge, and biosolids: Advancements in the field

Brisolara

Gentile

Puszykowski

et al. 2020

Water Environment Research

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Advancements in the field of residuals, sludge, and biosolids have been made in 2019. This review outlines the major contributions of researchers that have been published in peer-reviewed journals and conference proceedings throughout 2019 and includes brief summaries from over 125 articles. The review is organized in sections including life cycle and risk assessments; characteristics, quality, and measurement including micropollutants, nanoparticles, pathogens, and metals; sludge treatment technologies including dewatering, digestion, composting, and wetlands; disposal and reuse including adsorbents, land application and agricultural uses, nutrient recovery, and innovative uses; odor and air emissions; and energy issues.

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“…However, conventional thermophilic composting (cTC) technology still suffers from low composting temperatures, high nitrous oxide (N 2 O) emissions and unsatisfactory germination indices (GIs), leading to a reduction in the environmental bene ts of composting plants [2,9,10]. Given that microorganisms play a crucial role in all events related to the biotransformation of organic substrates during composting [11], hyperthermophilic microorganisms have been recently adopted in composting ecosystem known as hyperthermophilic composting (hTC) [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Keystone Genes Confer Superior Performance in Hyperthermophilic Composting

Cui

Liao

et al. 2021

Preprint

Self Cite

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Background: Large amounts of organic solid wastes originating from anthropogenic activities have imposed enormous pressure on the environment and human health. Our previous studies showed that compared with conventional thermophilic composting (cTC), hyperthermophilic composting (hTC) exhibits superior performance in organic solid waste disposal by providing advantages such as improved composting temperature, nitrogen conservation (NC), nitrous oxide (N2O) mitigation and germination index (GI). However, it remains unclear how hTC communities drive improved performance. Here, we used GeoChip 5.0M coupled with high-throughput 16S rRNA gene sequencing data to investigate the variations in carbon (C)-degrading and nitrogen (N)-cycling genes and microbial communities and their linkages with selected performance indices (composting temperature, NC, N2O emission rate and GI) in hTC and cTC in factory-scale experiments, aiming to identify the keystone biotic drivers for the improved performance. Results: We showed that hTC significantly altered functional composition structures compared with those in cTC, which was driven by taxonomic shift in microbial communities. Specifically, hTC significantly increased the relative abundance of C-degrading genes and decreased the relative abundance of N-cycling genes during composting. These significantly shifted genes were the keystone genes dominating the improved performance of hTC, as indicated by a random forest model. Furthermore, network and partial least squares path modeling analysis suggested that the keystone genes continued to dominantly drive the improved performance after multiple biotic (community composition and other genes) drivers were simultaneously considering in hTC. Conclusions: Together, our study provides evidence that keystone genes potentially play a pivotal role in improving composting temperature, N2O mitigation, NC and GI in hTC and emphasizes the importance of understanding the variation in functions for targeted manipulation of composting practices.

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Enhanced in situ biodegradation of microplastics in sewage sludge using hyperthermophilic composting technology

Cited by 249 publications

References 40 publications

Fate of disposable face masks in high-solids anaerobic digestion: Experimental observations and review of potential environmental implications

Fate of disposable face masks in high-solids anaerobic digestion: Experimental observations and review of potential environmental implications

Residuals, sludge, and biosolids: Advancements in the field

Keystone Genes Confer Superior Performance in Hyperthermophilic Composting

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