Enhanced bio-hydrogen production from protein wastewater by altering protein structure and amino acids acidification type.

ABSTRACT: Enhanced bio-hydrogen production from protein wastewater by altering protein structure and amino acids acidification type via pH control was investigated. The hydrogen production reached 205.2 mL/g-protein when protein wastewater was pretreated at pH 12 and then fermented at pH 10. The mechanism studies showed that pH 12 pretreatment significantly enhanced protein bio-hydrolysis during the subsequent fermentation stage as it caused the unfolding of protein, damaged the protein hydrogen bonding networks, and destroyed the disulfide bridges, which increased the susceptibility of protein to protease. Moreover, pH 10 fermentation produced more acetic but less propionic acid during the anaerobic fermentation of amino acids, which was consistent with the theory of fermentation type affecting hyd

SUBMITTER: Xiao N 

PROVIDER: S-EPMC3913933 | biostudies-literature | 2014 Feb

REPOSITORIES: biostudies-literature