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Stabilizing lactate production through repeated batch fermentation of food waste and waste activated sludge

Abstrakt

Bio-valorization of organic waste streams, such as food waste and waste activated sludge, to lactic acid (LA) has recently drawn much attention. It offers an opportunity for resource recovery, alleviates environmental issues and potentially turns a profit. In this study, both stable and high LA yield (0.72 ± 0.15 g/g total chemical oxygen demand) and productivity rate (0.53 g/L•h) were obtained through repeated batch fermentation. Moreover, stable solubilization and increase in the critical hydrolase activities were achieved. Depletions of ammonia and phosphorus were correlated with the LA production. The relative abundance of the key LA bacteria genera (i.e., Alkaliphilus, Dysgonomonas, Enterococcus and Bifidobacterium) stabilized in the repeated batch reactor at a higher level (44.5 ± 2.53%) in comparison with the batch reactor (26.2 ± 4.74%). This work show a practical way for the sustainable valorization of organic wastes to LA by applying the repeated batch mode during biological treatment.

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Informacje szczegółowe

Kategoria:
Publikacja w czasopiśmie
Typ:
artykuły w czasopismach
Opublikowano w:
BIORESOURCE TECHNOLOGY nr 300, strony 1 - 9,
ISSN: 0960-8524
Język:
angielski
Rok wydania:
2020
Opis bibliograficzny:
Xu X., Zhang W., Gu X., Guo Z., Song J., Zhu D., Liu Y., Liu Y., Xue G., Li X., Mąkinia J.: Stabilizing lactate production through repeated batch fermentation of food waste and waste activated sludge// BIORESOURCE TECHNOLOGY -Vol. 300, (2020), s.1-9
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1016/j.biortech.2019.122709
Źródła finansowania:
  • This work was supported by Natural Science Foundation (NSF) of China (51878137, 51878136); the Fundamental Research Funds for the Central Universities and the Donghua University Distinguished Young Professor Program; Shanghai Chen-Guang Program (17CG34); and the Natural Science Foundation of Shanghai (No. 18ZR1401000).
Weryfikacja:
Politechnika Gdańska

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