Reduced pH is the primary factor promoting humic acid formation during hyperthermophilic pretreatment composting

Cao, Yun; Gu, Junyu; Zhang, Jing; Bao, Changchun; Xu, Yanbin; Liu, Dongyang; Hu, Hang‐Wei; Huang, Hongying

doi:10.1016/j.jenvman.2022.115215

Cited by 18 publications

(4 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…28 Moreover, the biotransformation of organic acids, such as the biodegradation of amino acids and the formation of humic acids, could also contribute to the slight pH variation in composting. 29 Given favorable conditions for nitrification and NH 4 + -N accumulation, the NO 3 − -N content increased rapidly within the first week to a stable level of approximately 0.02 g•kg −1 of DM (Figure 2E). Of the three treatments, cornstalks favored organic biodegradation and temperature increase as discussed above, thereby resulting in lower matrix pH and NH 4 + -N content but higher NO 3…”

Section: Resultsmentioning

confidence: 94%

“…Nevertheless, NH 4 + -N could escape from composting piles as NH 3 to reduce its occurrence and thus matrix pH . Moreover, the biotransformation of organic acids, such as the biodegradation of amino acids and the formation of humic acids, could also contribute to the slight pH variation in composting . Given favorable conditions for nitrification and NH 4 + -N accumulation, the NO 3 – -N content increased rapidly within the first week to a stable level of approximately 0.02 g·kg –1 of DM (Figure E).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Role of Lignocellulosic Biomass Composition to Regulate Microbial Mutualism for Organic Mineralization and Humification during Digestate Composting

Gao,

Xu,

Shi

et al. 2024

ACS EST Eng.

View full text Add to dashboard Cite

This study investigated the performance of lignocellulosic wastes to regulate microbial interactions to improve the composting of digestate from the anaerobic digestion of food waste regarding organic mineralization and humification. Garden waste, rice husk, and cornstalks with diverse lignocellulosic biomass compositions and structures were representatively selected for comparison. High-throughput sequencing was integrated with a modular network analysis to decipher microbial community structures and their interactions. Results showed that mixing 15% of cornstalks and garden waste with digestate (wet weight) was more effective than rice husk to enrich functional microbes (e.g., Tepidimicrobium and Mortierella) to promote the microbial interkingdom for lignocellulosic degradation and humus formation. In particular, a stronger bacterial intrakingdom mutualism was observed with cornstalk addition to facilitate the progressive succession of bacteria in digestate from anaerobic to aerobic and thus inhibit the activities of anaerobic and denitrifying microbes to reduce the emissions of methane and nitrous oxide by 14.2−49.1%. Furthermore, garden waste with more lignin could effectively strengthen intrakingdom mutualism within fungi and their interkingdom interaction with bacteria to mitigate organic carbon mineralization and reduce carbon dioxide emission by 39.8−42.7%. By contrast, rice husk weakened microbial interkingdom mutualisms to retard organic biodegradation and humification during digestate composting. Results from this study provided fundamental understanding on selecting lignocellulosic wastes to regulate organic biotransformation and to improve humification and simultaneously mitigate gaseous emissions in digestate composting.

show abstract

Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Role of Lignocellulosic Biomass Composition to Regulate Microbial Mutualism for Organic Mineralization and Humification during Digestate Composting

Gao,

Xu,

Shi

et al. 2024

ACS EST Eng.

View full text Add to dashboard Cite

show abstract

“…67 The pH significantly impacts humification, as its certain ranges provide optimal conditions for microbial activity and enzymatic reactions involved in the formation of HS. 68 Additionally, the presence of specific microorganisms, such as bacteria and fungi, contributes to the production of HS. Microbial activity and the associated enzymatic processes play a important role in breaking down and transforming organic matter into HS.…”

Section: Formation Mechanisms and Factorsmentioning

confidence: 99%

“…However, excessively high temperatures may hinder microbial activity, thereby affecting HS formation . The pH significantly impacts humification, as its certain ranges provide optimal conditions for microbial activity and enzymatic reactions involved in the formation of HS . Additionally, the presence of specific microorganisms, such as bacteria and fungi, contributes to the production of HS.…”

Section: Hs: Properties Formation and Pollutant Immobilizationmentioning

confidence: 99%

Transforming Organic Solid Waste Management: Embracing Humification for Sustainable Resource Recovery

Bian,

Boguta,

Huang

et al. 2024

ACS Sustainable Resour. Manage.

View full text Add to dashboard Cite

The paper provides an overview of the potential use of humic substances (HS) derived from organic waste in transforming waste management practices. It discusses various types of organic waste, the production methods of HS, and their applications in agriculture, environmental remediation, and industry. The Perspective emphasizes the transformative potential of HS in reshaping organic waste management practices, highlighting improved soil fertility, mitigation of soil degradation, and immobilization of pollutants in soil and water systems. Additionally, it explores the economic viability of HS-based waste management and potential revenue streams from value-added products derived from HS. The paper also addresses environmental and regulatory considerations, emphasizing the importance of comprehensive regulatory frameworks, international policy and regulatory support, and continuous monitoring and evaluation of waste management practices. By integrating HS-based waste management into circular economy models, the paper suggests that it can contribute to resource conservation, nutrient recycling, and the development of a bio-based economy. Overall, the utilization of HS in organic waste management has the potential to revolutionize the field and contribute to sustainable resource recovery. The paper suggests that future research should continue to explore the quantifiable benefits of integrating HS into organic waste management, ultimately contributing to a more sustainable and efficient waste management system.

show abstract

Large-scale production of a nutrient-rich soil conditioner by optimized biodegradation of vegetable waste: biodiversity and toxicity assessments

Pottipati

Haq

Kalamdhad

2023

Biomass Conv. Bioref.

View full text Add to dashboard Cite

Reduced pH is the primary factor promoting humic acid formation during hyperthermophilic pretreatment composting

Cited by 18 publications

References 41 publications

Role of Lignocellulosic Biomass Composition to Regulate Microbial Mutualism for Organic Mineralization and Humification during Digestate Composting

Role of Lignocellulosic Biomass Composition to Regulate Microbial Mutualism for Organic Mineralization and Humification during Digestate Composting

Transforming Organic Solid Waste Management: Embracing Humification for Sustainable Resource Recovery

Large-scale production of a nutrient-rich soil conditioner by optimized biodegradation of vegetable waste: biodiversity and toxicity assessments

Contact Info

Product

Resources

About