Biotechnological production of lactic acid integrated with fishmeal wastewater treatment by <Emphasis Type="Italic">Rhizopus oryzae</Emphasis> |
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Authors: | Li Ping Huang Tao Dong Jing Wen Chen Ning Li |
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Institution: | (1) School of Environmental and Biological Science and Technology, Dalian University of Technology, Dalian, 116024, China |
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Abstract: | Fishmeal wastewater, a seafood processing waste, was utilized for production of lactic acid and fungal biomass by Rhizopus oryzae AS 3.254 with the addition of sugars. The 30 g/l exogenous glucose in fishmeal wastewater was superior to starch in view
of productivities of lactic acid and fungal biomass, and COD reduction. Fishmeal wastewater can be a replacement for peptone
which was the most suitable nitrogen source for lactic acid production among the tested organic or inorganic nitrogen sources.
Exogenous NaCl (12 g/l) completely inhibited the production of lactic acid and fungal growth. In the medium of COD 5,000 mg/l
fishmeal wastewater with the addition of 30 g/l glucose, the maximum productivity of lactic acid was 0.723 g/l h corresponding
to productivity of fungal biomass 0.0925 g/l h, COD reduction 84.9% and total nitrogen removal 50.3% at a fermentation time
of 30 h. |
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Keywords: | Lactic acid Fishmeal wastewater Fungal biomass Fermentation |
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