Transformation kinetics of mixed polymeric substrates under transitory conditions by Aspergillus niger
Keywords:
: Polysaccharide, wastewater, starch,, bovine serum albumin, macromolecules, tank-in-series reactor, enzyme.Abstract
A mixture of polymeric substrates (simulating a complex wastewater) was transformed under sewer
conditions and aerobiosis by Aspergillus niger in a tanks-in-series reactor at a hydraulic retention time
of 14 h. Starch was totally removed after 7 h of incubation. Removal of the protein portion with a
molecular weight larger than 2 kDa followed the starch removal and the total proteins were the latest to
be removed. Alkaline phosphatase, leucine aminopeptidase, valine aminopeptidase, α -βglucosidase
and α-mannosidase were abundantly secreted in the growth medium. This research is the first report on
mixed polymeric substrate biodegradation under sewer condition by A. niger, and could be considered
as an open window on fungal biomass valorisation in wastewater treatment.
