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Evaluation of Lactobacillus kefiri and manganese peroxidase-producing bacteria for decolorization of melanoidins and reduction of chemical oxygen demand
Faculty
Agriculture
Year:
2022
Type of Publication:
ZU Hosted
Pages:
704-714
Authors:
Samir Ahmed Merghani Mahgoub
Staff Zu Site
Abstract In Staff Site
Journal:
Water and Environment Journal Wiley
Volume:
35
Keywords :
Evaluation , Lactobacillus kefiri , manganese peroxidase-producing bacteria
Abstract:
Thirteen bacterial isolates from a bioreactor treating a mixture of municipal and molasses wastewater were investigated for their potential to degrade and decolorize melanoidins. All isolates were initially screened for manganese peroxidase activity and growth potential in the presence of four synthetic melanoidins solutions at concentrations ranging from 3 to 7 g/L/L. Three isolates of potential manganese peroxidase-producing bacteria two Klebsiella sp. (B2-B3) and Escherichia coli (B4) and one strain of Lactobacillus kefiri (B1) showed high synthetic melanoidin tolerance. The 16S rDNA sequence showed that they were closely related to E. coli and Klebsiella sp. The most significant degree of decolorization was observed on day 1, reaching 60-67%. Furthermore, the tested strains reduced the chemical oxygen demand by more than 50% or more than 70% of the initial value with or without additional supplementation of the reaction mixture, respectively. All tested isolates showed increased ability for reducing the organic matter content of a raw melanoidin solution exceeding 65%, favouring, therefore, the utilization potential of the isolated strains for the biological processing of molasses wastewaters. Thus, microbial decolorization could be an innovative wastewater treatment for environmental protection purposes.
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Samir Ahmed Merghani Mahgoub, "Enhancement of drought tolerance in diverse Vicia faba cultivars by inoculation with plant growth-promoting rhizobacteria under newly reclaimed soil conditions", Nature, 2021
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Samir Ahmed Merghani Mahgoub, "Inhibition of Penicillium digitatum in vitro and in postharvest orange fruit by a soy protein fraction containing mainly b-conglycinin", Springer, 2016
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Samir Ahmed Merghani Mahgoub, "Impeding Bacillus spore germination in vitro and in milk by soy glycinin during long cold storage", Journal of General and Applied Microbiology, 2016
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Department Related Publications
Ahmed Abdelmohsen Mahdi , "Effect of high pressure thermal pretreatment on Chlorella vulgaris biomass: Organic matter solubilisation and biochemical methane potential", Elsevier, 2013
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Ahmed Abdelmohsen Mahdi , "Protease pretreated Chlorella vulgaris biomass bioconversion to methane via semi-continuous anaerobic digestion", Elsevier, 2015
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Samir Ahmed Merghani Mahgoub, "Improving growth performance and health status of meat-type quail by supplementing the diet with black cumin cold-pressed oil as a natural alternative for antibiotics", Springer, 2018
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Mohamed TalaatAbdou Mohamed El-Sadony, "Biosynthesis, Optimization and Characterization of Silver Nanoparticles Using a Soil Isolate of Bacillus pseudomycoides MT32 and their Antifungal Activity Against some Pathogenic Fungi", Biosynthesis, Optimization, 2019
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Samir Ahmed Merghani Mahgoub, "Impact of Rosmarinus officinalis cold-pressed oil on health, growth performance, intestinal bacterial populations, and immunocompetence of Japanese quail", Elsevier, 2019
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