Abstract
The present study aimed at reducing the pollution of the waste generated by the potato starch industry to the environment and transform the potato pulp and wastewater into single-cell protein (SCP) to be used as animal feed. The chemical oxygen demand of the wastewater was reduced from 26,700 to 9,100 mg/L by batch fermentation with mixed cultures in an aerated 10-L fermenter. The SCP products, with a crude protein content of 46.09 % (higher than soybean meal), were found palatable and safe for mice. During the treatment process, the microbial community was analyzed using the terminal restriction fragment length polymorphism for bacterial 16S rRNA genes. The results of the analysis suggested that Curacaobacter/Pseudoalteromonas and Paenibacillus/Bacillus were the main microorganisms in treating potato starch processing wastes. The 150-m3-scale fermentation demonstrated a potential for treatment in industrial applications. Fermentation of potato pulp and wastewater without adding an extra nitrogen source was a novel approach in treating the potato starch processing waste.
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Acknowledgement
The authors wish to thank the Chinese government for the financial support of this study under the National High Technology Research and Development Program 2011AA10A205 and Heilongjiang Province Technological Project GA08C201.
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Liu, B., Song, J., Li, Y. et al. Towards Industrially Feasible Treatment of Potato Starch Processing Waste by Mixed Cultures. Appl Biochem Biotechnol 171, 1001–1010 (2013). https://doi.org/10.1007/s12010-013-0401-1
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DOI: https://doi.org/10.1007/s12010-013-0401-1