Performance and mechanism of sodium percarbonate (SPC) enhancing short-chain fatty acids production from anaerobic waste activated sludge fermentation

Wang, Yufen; Sun, Peizhe; Guo, Haixiao; Zheng, Kaixin; Zhu, Tingting; Liu, Yiwen

doi:10.1016/j.jenvman.2022.115025

Cited by 57 publications

(10 citation statements)

References 48 publications

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“…6 and Table S4 ). The enhanced activity of acetate kinase strengthened the conversion of acetyl-CoA to acetic acid, benefiting the acetate-dependent methanogenesis [ 48 ]. Further, coenzyme F 420 , responsible for all methanogenesis pathways, increased in response to PI dosage ( Table S4 ).…”

Section: Resultsmentioning

confidence: 99%

“…Further, coenzyme F 420 , responsible for all methanogenesis pathways, increased in response to PI dosage ( Table S4 ). Although a previous study reported that methanogenic archaea had low tolerance to a strong oxidating environment [ 48 ], the dilution effects of inoculum offset the possible inhibition of PI on coenzyme F 420 . More importantly, the remarkable improvement of biodegradability of pretreated WAS, including the release of biodegradable substrates from the cells and the decrease of refractory organics under the oxidation effects of PI, and the subsequent shifts of functional microbial populations, might play positive roles in stimulating the expressions of these enzymes.…”

Section: Resultsmentioning

confidence: 99%

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Enhanced anaerobic digestion of waste activated sludge with periodate-based pretreatment

Guo

Tian

Wang

et al. 2023

Environmental Science and Ecotechnology

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Enhanced anaerobic digestion of waste activated sludge with periodate-based pretreatment

Guo

Tian

Wang

et al. 2023

Environmental Science and Ecotechnology

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“…First of all, six replicate reactors (working volumes of 500 mL) were added with 300 mL of WAS and different amounts of PI powder, obtaining the initial dosages of 0, 10, 20, 30, 50, and 70 mg PI/g TS. To fully mix the PI powder and sludge, magnetic stirring (200 rpm) was implemented for 1 h. 11 The oxidation−reduction potential (ORP) at the end of pretreatment was measured through an ORP meter (Leici, Shanghai). Subsequently, the reactors were washed using N 2 for 5 min, guaranteeing the anaerobic environment before being sealed.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…It was generally reported that the recalcitrant organics contained in WAS were detrimental to SCFA production. 3,11 Also, there were contrary observations recently. For example, He et al 7 found that the hydrophilic functional groups and three-dimensional aromatic ring skeletons formed after ionization of lignin exhibited surfactant properties, which improved the solubilization of sludge and thereby boosted SCFA production.…”

Section: Acs Esandt Engineeringmentioning

confidence: 99%

“…), , physical pretreatments (microwave, thermal, ultrasonic, etc. ) and integration of these, , to overcome the aforementioned issues and enhance the SCFA yield. Among these pretreatment techniques, advanced oxidation strategies are of great promise for improving the SCFA production because of the high efficiency and beneficial side effects on the degradation/removal of hazardous substances (e.g., pollutants and pathogens). , For instance, Yang et al reported that the SCFA yield from WAS with peroxymonosulfate pretreatment (90 mg/g TSS) could be enhanced from 29.69 to 311.67 mg COD/L.…”

Section: Introductionmentioning

confidence: 99%

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Novel Insights into the Mechanisms of Periodate-Based Pretreatment in Enhancing Short-Chain Fatty Acids from Waste Activated Sludge

et al. 2023

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Resource recovery in the form of short-chain fatty acids (SCFAs) from waste activated sludge (WAS) is usually limited due to the quantity and quality of SCFAs. To mitigate these restrictions, this study provides a novel method by using periodate (PI) pretreatment. With an increase in the PI concentration from 0 to 50 mg/g total solids (TS), the SCFA yield increased from 1486 to 3109 mg COD/L and acetic acid production was enhanced by more than twice. Further increase of PI had an adverse effect on SCFA production. Electron spin resonance analysis confirmed that hydroxyl radicals (•OH) and superoxide radicals (•O2 –) might play crucial roles in the pretreatment process. Further mechanism studies revealed that PI pretreatment improved the disintegration of WAS and decomposition of humus as well as lignocellulose, thereby providing more substrates for SCFA production. The model-based synthetic wastewater tests combined with enzymatic analyses revealed that the stronger suppression of SCFA consumers compared to SCFA generators causes SCFA accumulation; specifically, the inhibitory order was methanogenesis > hydrolysis > acetogenesis > acidogenesis. The suppressed gene expression of acetate-dependent (such as cdh [EC: 2.1.1.245]) and CO2-type methanogenesis (such as fwd [EC: 2.3.1.101] and mch [EC: 1.5.98.1]) further triggered SCFA accumulation with PI addition. Moreover, PI pretreatment caused the microbial community to shift toward the favorable hydrolytic and acidification-associated (e.g., Longilinea, Acinetobacter, and Macellibacteroides) microorganisms. This study is expected to broaden an unknown application of PI and provide an alternative strategy for resource recovery in some specific circumstances.

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Effects of pesticide treatment against nematode disease on soil bacterial community structure and sweet potato yield and quality

Luo,

Zhu,

Xia

et al. 2024

Food and Energy Security

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Sweet potato stem nematode disease is a devastating disease, which seriously affects the yield and quality of sweet potato (Ipomoea batatas (L.) Lam.). At present, soil treatment with pesticides is mainly used to prevent sweet potato stem nematode disease. In this study, Illumina MiSeq high‐throughput sequencing technology was used to analyze the diversity of soil bacterial and fungal communities treated with different pesticides. At the same time, high performance liquid chromatography was used to determine the pesticide residues in soil and sweet potato, and the impact on sweet potato yield was investigated. Kruskal–Wallis test was used to analyze the four α‐diversity indexes of soil under different pesticide treatments, and the differences were not significant (p > 0.05), indicating that there was no significant difference in the diversity and abundance of bacterial and fungal communities in soil under different pesticide treatments. The results of principal coordinate analysis showed that there was no significant difference in bacterial and fungal community structure among different pesticide treatments (p > 0.05). Pesticide residue analysis and yield statistics of sweet potato showed that the residual amount of three kinds of pesticides in sweet potato did not exceed the maximum limit stipulated by the current National Standards for Food safety (GB2763‐2021). When 5% chlorpyrifos phoxim particles were applied at 15.18 kg/acre, sweet potato was unaffected by pests and diseases basically, and the yield was the highest.

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Performance and mechanism of sodium percarbonate (SPC) enhancing short-chain fatty acids production from anaerobic waste activated sludge fermentation

Cited by 57 publications

References 48 publications

Enhanced anaerobic digestion of waste activated sludge with periodate-based pretreatment

Enhanced anaerobic digestion of waste activated sludge with periodate-based pretreatment

Novel Insights into the Mechanisms of Periodate-Based Pretreatment in Enhancing Short-Chain Fatty Acids from Waste Activated Sludge

Effects of pesticide treatment against nematode disease on soil bacterial community structure and sweet potato yield and quality

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