Recent advances and perspectives in efforts to reduce the production and application cost of microbial flocculants

Author:

Liu Cong,Sun Di,Liu Jiawen,Zhu Jingrong,Liu WeijieORCID

Abstract

AbstractMicrobial flocculants are macromolecular substances produced by microorganisms. Due to its non-toxic, harmless, and biodegradable advantages, microbial flocculants have been widely used in various industrial fields, such as wastewater treatment, microalgae harvest, activated sludge dewatering, heavy metal ion adsorption, and nanoparticle synthesis, especially in the post-treatment process of fermentation with high safety requirement. However, compared with the traditional inorganic flocculants and organic polymeric flocculants, the high production cost is the main bottleneck that restricts the large-scale production and application of microbial flocculants. To reduce the production cost of microbial flocculant, a series of efforts have been carried out and some exciting research progresses have been achieved. This paper summarized the research advances in the last decade, including the screening of high-yield strains and the construction of genetically engineered strains, search of cheap alternative medium, the extraction and preservation methods, microbial flocculants production as an incidental product of other biological processes, combined use of traditional flocculant and microbial flocculant, and the production of microbial flocculant promoted by inducer. Moreover, this paper prospects the future research directions to further reduce the production cost of microbial flocculants, thereby promoting the industrial production and large-scale application of microbial flocculants.

Funder

National Natural Science Foundation of China

Natural Science Foundation of the Jiangsu Higher Education Institutions of China

Natural Science Foundation of Jiangsu Province

Natural Science Foundation of Xuzhou city

Six Talent Peaks Project in Jiangsu Province

Qing Lan Project of Jiangsu Province, Priority Academic Program Development of Jiangsu Higher Education Institutions

Publisher

Springer Science and Business Media LLC

Subject

Renewable Energy, Sustainability and the Environment,Biomedical Engineering,Food Science,Biotechnology

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