Application of DBNPA dosage for biofouling control in spiral wound membrane systems

A Siddiqui, I. Pinel, E. I. Prest, Sz S. Bucs, M. C.M. van Loosdrecht, J. C. Kruithof, J. S. Vrouwenvelder

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)


Biocides may be used to control biofouling in spiral-wound reverse osmosis (RO) and nanofiltration (NF) systems. The objective of this study was to investigate the effect of biocide 2,2-dibromo-3-ni-trilopropionamide (DBNPA) dosage on biofouling control. Preventive biofouling control was studied applying a continuous dosage of substrate (0.5 mg/L) and DBNPA (1 mg/L). Curative biofouling control was studied on pre-grown biofilms, once again applying a continuous dosage of substrate (0.5 mg acetate C/L) and DBNPA (1 and 20 mg/L). Biofouling studies were performed in membrane fouling simulators (MFSs) supplied with biodegradable substrate and DBNPA. The pressure drop was monitored in time and at the end of the study, the accumulated biomass in MFS was quantified by adenosine triphosphate (ATP) and total organic carbon (TOC) analysis. Continuous dosage of DBNPA (1 mg/L) prevented pressure drop increase and biofilm accumulation in the MFSs during a run time of 7 d, showing that biofouling can be managed by preventive DBNPA dosage. For biofouled systems, continuous dosage of DBNPA (1 and 20 mg/L) inactivated the accumulated biomass but did not restore the original pressure drop and did not remove the accumulated inactive cells and extracellular polymeric substances (EPS), indicating DBNPA dosage is not suitable for curative biofouling control.

Original languageEnglish
Pages (from-to)12-22
Number of pages11
JournalDesalination and Water Treatment: science and engineering (online)
Publication statusPublished - 1 Mar 2017


  • Biocide DBNPA
  • Biofouling control
  • Membranes
  • Seawater desalination
  • Wastewater reuse
  • Water treatment

Fingerprint Dive into the research topics of 'Application of DBNPA dosage for biofouling control in spiral wound membrane systems'. Together they form a unique fingerprint.

Cite this