The biodegradation and detoxification of azo dye - Direct Black G (DBG) with a newly isolated thermophilic microflora was investigated in the present study. It was found this microflora can decolorize DBG at a wide range of pH from 5 to 10, and grow well under high concentration of dye (600 mg·L) and salinity (50 g·L). Its decolorization ratio could reach 97% with 8 h of incubation at optimal conditions. The induction of laccase, manganese peroxidase, lignin peroxidase and azoreductase suggests their synergetic involvements in the degradation process of DBG. In addition, the phytotoxicity analysis indicated the thermophilic microflora converted toxic dye DBG into low toxicity metabolites. PCR-DGGE analysis revealed that there are nine different bacteria presented in this microflora. Furthermore, a new degradation pathway of DBG degradation by this microflora was proposed based on the intermediates identified by LC-ESI-MS/MS.
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http://dx.doi.org/10.1016/j.biortech.2017.11.092 | DOI Listing |
J Food Sci Technol
August 2023
Department of Biology, Faculty SNV-STU, University of Tlemcen, 13000 Tlemcen, Algeria.
Abstract: Spore-forming bacteria are common contaminants of milk powder and processing lines and a major concern for the dairy industry. This dairy-associated microflora was studied extensively and well characterized in developed countries (exporters of milk powder), compared to developing countries (importers). Thereby, the quality issues affecting dairy powders and derived products are not fully controlled in developing countries.
View Article and Find Full Text PDFPeerJ
May 2023
Department of Biological Sciences, Université de Montréal, Montréal, Québec, Canada.
Organic waste decomposition can make up substantial amounts of municipal greenhouse emissions during decomposition. Composting has the potential to reduce these emissions as well as generate sustainable fertilizer. However, our understanding of how complex microbial communities change to drive the chemical and biological processes of composting is still limited.
View Article and Find Full Text PDFMicroorganisms
February 2023
Faculty of Physical Education, Gdansk University of Physical Education and Sport, K. Gorskiego 1, 80-336 Gdansk, Poland.
So far, species bacteria are being used as bacteria concentrates, supplementing cleaning preparations in order to reduce odor and expel pathogenic bacteria. Here, we discuss the potential of species as 'natural' probiotics and evaluate their microbiological characteristics. An industrially used microbiological concentrates and their components of mixed Bacillus species cultures were tested, which may be a promising bacteria source for food probiotic preparation for supplementary diet.
View Article and Find Full Text PDFJ Appl Microbiol
January 2023
Graduate School of Horticulture, Chiba University, Matsudo, Chiba 271-8501, Japan.
Aims: Hercules beetle is a popular pet and large adult individuals are considered valuable. Incorporating compost prepared from marine animals and fermented by thermophilic bacteria into the humus benefits the gut microflora of several livestock. Here, we evaluated whether this compost improves the growth of the Hercules beetle (Dynastes hercules hercules) larvae.
View Article and Find Full Text PDFLife (Basel)
May 2022
The "Stephan Angeloff" Institute of Microbiology, Bulgarian Academy of Sciences, Acad G. Bonchev Str., Bl. 26, 1113 Sofia, Bulgaria.
Anaerobic digestion (AD) is a widespread biological process treating organic waste for green energy production. In this study, wheat straw and corn stalks without any harsh preliminary treatment were collected as a renewable source to be employed in a laboratory-scale digester to produce biogas/biomethane. Processes parameters of temperature, pH, total solids, volatile solid, concentration of volatile fatty acids (VFA), and cellulose concentration, were followed.
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