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Ammonia amendment promotes high rate lactate production and recovery from semi-continuous food waste fermentation
Abstract
In this study, a reliable approach using ammonia nitrogen was proposed to increase lactate production during semi-continuous food waste (FW) fermentation under mesophilic conditions. Both free ammonia nitrogen (FAN) and ammonium ion (NH4+-N) were present in mesophilic reactors, with a wide FAN/NH4+-N ratio variation due to the intermittent pH control. The investigation of responsible mechanisms revealed that the increased production yield of LA was associated with the acceleration of solubilization, hydrolysis, glycolysis and acidification. The presence of FAN and NH4+-N in proper concentrations increased lactate production by 2.4 folds and recovered lactate production to 24.5 g COD/L from low rate control reactor (9.6 g COD/L) under mesophilic conditions. Furthermore, the microorganisms responsible for LA accumulation (Bavariicoccus, Enterococcus, Bifidobacterium and Corynebacterium) were selectively enriched, and KEGG (Kyoto Encyclopedia of Genes and Genomes) pathways associated with carbohydrate transport and LA production were enhanced in nitrogen fed reactors.
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Authors (9)
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Author links open overlay panelWenjuan Zhang
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Xiang Li
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Ya He
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Hong Chen
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Ai Zhang
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Yanan Liu
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Gang Xue
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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BIORESOURCE TECHNOLOGY
no. 302,
pages 1 - 18,
ISSN: 0960-8524 - Language:
- English
- Publication year:
- 2020
- Bibliographic description:
- Zhang A., Li X., He Y., Xu X., Chen H., Zhang A., Liu Y., Xue G., Mąkinia J.: Ammonia amendment promotes high rate lactate production and recovery from semi-continuous food waste fermentation// BIORESOURCE TECHNOLOGY -Vol. 302, (2020), s.1-18
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.biortech.2020.122881
- Sources of funding:
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- This work was supported by National Natural Science Foundation of China (NSFC) (51878137, 51878136, 51878135); the Fundamental Research Funds for the Central Universities and the Donghua University Distinguished Young Professor Program; Shanghai Chen-Guang Program (17CG34).
- Verified by:
- Gdańsk University of Technology
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