Effects of segmented aerobic and anaerobic fermentation assisted with chemical treatment on comprehensive properties and composition of wheat straw. (October 2022)

• Record Type: Journal Article
• Authors: Xu, Chao; Li, Jun; Zhang, Xin; Wang, Panpan; Deng, Bo; Liu, Nian; Yuan, Qiaoxia
• Is Part Of: Bioresource technology. Volume 362(2022)
• Publication Date: 2022-10
• Subjects: Wheat straw -- Segmented fermentation -- Wood vinegar -- Physicochemical properties -- Composition; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2022.127772
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Novel segmented aerobic/anaerobic fermentation treatments for wheat straw. AN as the first stage could stabilize straw pH value and retain nutrients. Aerobic composting as the first stage could help to degrade hemicellulose. High SiO2 content in ash results in lower organic matter content in straw. Abstract: Traditional aerobic composting used for straw treatment shows limited regulation effects and unstable properties, and it is necessary to introduce some co-processing methods to optimize its performance. Herein, segmented aerobic/anaerobic fermentation, combined with chemical treatment with wood vinegar/NaOH, was used to treat wheat straw. The results showed that anaerobic fermentation when used as the first stage could stabilize the wheat straw pH between 5.19 and 6.13 and improve nutrient contents. All treatments had greater effects on substrate aeration porosities (range of 14%) than on total porosity (range of 6%), and the water-holding porosities were improved to a greater extent by NaOH than by wood vinegar. The hemicellulose degradation rate of aerobic-anaerobic treatment was higher than that achieved with anaerobic-aerobic treatment, while the latter method was more effective at removing the neutral detergent-soluble as well as remaining organic matter, which was generated due to a higher KCl content in the ash.