Effect of phosphate availability on biofilm formation in cooling towers.

Ingrid S M Pinel, Lan Hee Kim, Vitor R Proença Borges, Nadia M Farhat, Geert Jan Witkamp, Mark C M van Loosdrecht, Johannes S. Vrouwenvelder

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Phosphate limitation has been suggested as a preventive method against biofilms. P-limited feed water was studied as a preventive strategy against biofouling in cooling towers (CTs). Three pilot-scale open recirculating CTs were operated in parallel for five weeks. RO permeate was fed to the CTs (1) without supplementation (reference), (2) with supplementation by biodegradable carbon (P-limited) and (3) with supplementation of all nutrients (non-P-limited). The P-limited water contained ≤10 µg PO4 l-1. Investigating the CT-basins and coupons showed that P-limited water (1) did not prevent biofilm formation and (2) resulted in a higher volume of organic matter per unit of active biomass compared with the other CTs. Exposure to external conditions and cycle of concentration were likely factors that allowed a P concentration sufficient to cause extensive biofouling despite being the limiting compound. In conclusion, phosphate limitation in cooling water is not a suitable strategy for CT biofouling control.
Original languageEnglish (US)
Pages (from-to)1-16
Number of pages16
JournalBiofouling
DOIs
StatePublished - Sep 5 2020

Fingerprint

Dive into the research topics of 'Effect of phosphate availability on biofilm formation in cooling towers.'. Together they form a unique fingerprint.

Cite this