biodegradation of hydrolyzed polyacrylamide by a bacillus

biodegradation of hydrolyzed polyacrylamide by a bacillus
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  • Which conditions are more conducive to hydrolyzed polyacrylamide biodegradation by Bacillus megaterium strain SZK?
  • Song et al. (2019) found that mild basic conditions (pH 8.19) was more conducive to hydrolyzed polyacrylamide biodegradation by Bacillus megaterium strain SZK-5 comparing with neutral and acidic conditions (pH 5–7).
  • Can Bacillus megaterium degrade hydrolyzed polyacrylamide (HPAM)?
  • Bacillus megateriumcould effectively degrade hydrolyzed polyacrylamide (HPAM). Cytochrome P450 played a central role in cleaving the carbon chain of HPAM molecule. Nitrogen removal was mainly catalyzed by urease. Enzymes in different fractions played distinct roles in the biodegradation of HPAM.
  • How is polyacrylamide biodegraded?
  • Both single microbial species as well as mixed populations have been investigated for degradation. Biodegradation of polyacrylamide begins with amidase catalysed deamination of polyacrylamide to ammonia and polyacrylate. The liberated ammonia is then used as a nitrogen source for growth by the microbes.
  • Is polyacrylate more recalcitrant to biodegradation than amide?
  • The carbon backbone, polyacrylate, is more recalcitrant to biodegradation than the amide moieties. There are nevertheless reports on microbial growth with polyacrylamide and polyacrylate as the carbon sources.