d-Amino acid mitigated membrane biofouling and promoted biofilm detachment

Abstract This study investigated the effect of d -tyrosine on membrane biofouling from both inhibited microbial attachment onto and promoted biofilm detachment from nylon membrane surfaces. Results showed that d -tyrosine at the concentrations studied did not influence microbial growth, substrate utilization and the synthesis of cellular ATP, but significantly inhibited production of autoinducer-2 and extracellular polymeric substances, and reduced microbial attachment onto nylon membrane surfaces was observed. Detachment of biofilms precultured on membrane surface was also observed when exposed to d -tyrosine solutions. These indicate that d -tyrosine was able to mitigate membrane biofouling and promote biofilm detachment through inhibition of cellular communication and extracellular polymeric substance (EPS) production.

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