biodegradation of polyacrylamide by anaerobic digestion in luxembourg

biodegradation of polyacrylamide by anaerobic digestion in luxembourg
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  • Is polyacrylamide used in sludge dewatering anaerobic digestion?
  • Polyacrylamide (PAM) used in sludge dewatering widely exists in high-solid anaerobic digestion. Degradation of polyacrylamide accompanied with accumulation of its toxic monomer is important to disposition of biogas residues. The potential of anaerobic digestion activity in microbial utilization of PAM was investigated in this study.
  • Does polyacrylamide deamination and depolymerization rate matter in sludge dewatering?
  • The deamination and depolymerization rate of polyacrylamide were explored. The breakdown position of carbon chain backbone was investigated. Polyacrylamide (PAM) used in sludge dewatering widely exists in high-solid anaerobic digestion.
  • 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.
  • Does biological filtration improve polyacrylamide biodegradation?
  • Freedman, D. E. et al. Biologically active filtration for fracturing flowback and produced water treatment. J. Water Process Eng. 18, 29–40 (2017). Dai, X. et al. Waste-activated sludge fermentation for polyacrylamide biodegradation improved by anaerobic hydrolysis and key microorganisms involved in biological polyacrylamide removal.