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Purpose <p>Agricultural waste contains large amount of lignocellulosic fibers, which are highly recalcitrant to microbial degradation during composting. This study attempted to enhance the composting efficiency and product quality at low temperature by adding fungal fermentation products into composting piles, as well as to determine the probably microbial mechanism.</p> Methods <p>Two kinds of fungal ferments, which were produced from <i>Trametes</i> sp. W­4 (W­4) and <i>Penicillium</i> sp. SW­3 (SW­3), respectively, were added to the composting pile in Tibetan plateau, where the temperature is low in the whole year. Both the two strains are psychrotrophic and lignocellulolytic. Physico-chemical characters were measured to evaluate the composting efficiency and product quality. Structure and diversity of microbial communities were revealed by high-throughput sequence analysis.</p> Results <p>The addition of fermentation products of SW-3 and W-4 could quickly start up the composting and significantly increase the high-temperature days from 5 to 9 and 13, respectively. At the end of composting, hemicellulose, cellulose and lignin degradation rates in the SW-3 group increased by 14.5%, 10.5%, and 9.5%, respectively, while increased by 6.0%, 20.5%, and 6.5% in W-4 group, respectively. The high-throughput sequence analysis results indicated that the addition of fermentation products from SW-3 and W-4 promoted the growth and reproduction of lignocellulose-degrading bacteria at the cooling and maturation stages. Metabolic function analysis showed that the number of sequences involved in carbohydrate metabolism in SW-3 and W-4 treatments were reduced.</p> Conclusion <p>The addition of fermentation products of SW-3 and W-4 prolonged the thermophilic period, increased germination index (GI) and improved lignocellulose degradation efficiency. The different addition induced different changes in physicochemical properties of compost, which in turn affected the structure of microbial community.</p> Graphical Abstract <p></p>

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Study on Fungal Ferments as Additives to Improve Aerobic Composting Efficiency of Agricultural Waste in Low-Temperature Condition

  • 期刊论文

  • 发表日期：

    2025年7月8日

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  • Suzhen Wei,
  • Jie Yang

摘要

Purpose

Agricultural waste contains large amount of lignocellulosic fibers, which are highly recalcitrant to microbial degradation during composting. This study attempted to enhance the composting efficiency and product quality at low temperature by adding fungal fermentation products into composting piles, as well as to determine the probably microbial mechanism.

Methods

Two kinds of fungal ferments, which were produced from Trametes sp. W­4 (W­4) and Penicillium sp. SW­3 (SW­3), respectively, were added to the composting pile in Tibetan plateau, where the temperature is low in the whole year. Both the two strains are psychrotrophic and lignocellulolytic. Physico-chemical characters were measured to evaluate the composting efficiency and product quality. Structure and diversity of microbial communities were revealed by high-throughput sequence analysis.

Results

The addition of fermentation products of SW-3 and W-4 could quickly start up the composting and significantly increase the high-temperature days from 5 to 9 and 13, respectively. At the end of composting, hemicellulose, cellulose and lignin degradation rates in the SW-3 group increased by 14.5%, 10.5%, and 9.5%, respectively, while increased by 6.0%, 20.5%, and 6.5% in W-4 group, respectively. The high-throughput sequence analysis results indicated that the addition of fermentation products from SW-3 and W-4 promoted the growth and reproduction of lignocellulose-degrading bacteria at the cooling and maturation stages. Metabolic function analysis showed that the number of sequences involved in carbohydrate metabolism in SW-3 and W-4 treatments were reduced.

Conclusion

The addition of fermentation products of SW-3 and W-4 prolonged the thermophilic period, increased germination index (GI) and improved lignocellulose degradation efficiency. The different addition induced different changes in physicochemical properties of compost, which in turn affected the structure of microbial community.

Graphical Abstract