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Effects of citric acid and heterofermentative inoculants on anaerobic co-fermentation of Chinese cabbage waste and wheat bran by Jiawei Li; Shuo Jia; Dongbo Ma; Xianglong Deng; Jiahui Tian; Ruixue Wang; Jianping Li; Anshan Shan is a Engineering article available to read on EtoBox.

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The effects of Lactobacillus buchneri, Lactobacillus hilgardii and citric acid on organic acid production, substrate consumption, protein degradation and microbial community were investigated in this study. The results indicated that combined inoculants induced a significant increase in levels of lactic acid (43 g/kg dry matter), acetic acid (14 g/kg dry matter), butyric acid (5 g/kg dry matter), total organic acid (60 g/kg dry matter) and ammonia nitrogen (20 g/kg total nitrogen). Furthermore, citric acid addition into the combined inoculants caused a significant increase in levels of acetic acid (12 g/kg dry matter), water-soluble carbohydrate (12 g/kg dry matter) and a reduction in ammonia nitrogen formation (22 g/kg total nitrogen). Microbiologically, combining inoculants and citric acid enriched Lactobacillus buchneri and Lactobacillus hilgardii and upregulated the functional pathways related to acid production and resistance. Collectively, combining citric acid and heterofermentative inoculants was beneficial to recycle Chinese cabbage waste in producing organic acids.

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Author

Jiawei Li; Shuo Jia; Dongbo Ma; Xianglong Deng; Jiahui Tian; Ruixue Wang; Jianping Li; Anshan Shan

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)