Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Biofouling in capillary and spiral wound membranes facilitated by marine algal bloom
Villacorte, L.O. ; Ekowati, Y. ; Calix-Ponce, H.N. ; Kisielius, V. ; Kleijn, J.M. ; Vrouwenvelder, J.S. ; Schippers, J.C. ; Kennedy, M.D. - \ 2017
Desalination 424 (2017). - ISSN 0011-9164 - p. 74 - 84.
Algal organic matter - Biological fouling - Capillary and spiral wound membranes - Seawater reverse osmosis - Transparent exopolymer particles (TEP)

Algal-derived organic matter (AOM), particularly transparent exopolymer particles, has been suspected to facilitate biofilm development in membrane systems (e.g., seawater reverse osmosis). This study demonstrates the possible role of AOM on biofouling in membrane systems affected by marine algal blooms. The tendency of AOM from bloom-forming marine algae to adhere to membranes and its ability to enhance biofilm growth were measured using atomic force microscopy, flow cytometry, liquid chromatography and accelerated membrane biofouling experiments. Adhesion force measurements indicate that AOM tends to adhere to clean membranes and even more strongly to AOM-fouled membranes. Batch growth tests illustrate that the capacity of seawater to support bacterial growth can significantly increase with AOM concentration. Biofouling experiments with spiral wound and capillary membranes illustrate that when nutrients availability are not limited in the feed water, a high concentration of AOM – whether in suspension or attached to the membrane – can substantially accelerates biofouling. A significantly lower biofouling rate was observed on membranes exposed to feed water spiked only with AOM or easily biodegradable nutrients. The abovementioned findings indicate that AOM facilitates the onset of membrane biofouling primarily as a conditioning platform and to some extent as a nutrient source for biofilm-forming bacteria.

Long-term performance and fouling analysis of full-scale direct nanofiltration (NF) installations treating anoxic groundwater
Beyer, F. ; Rietman, B.M. ; Zwijnenburg, A. ; Brink, P. van den; Vrouwenvelder, J.S. ; Jarzembowska, M. ; Laurinonyte, J. ; Stams, A.J.M. ; Plugge, C.M. - \ 2014
Journal of Membrane Science 468 (2014). - ISSN 0376-7388 - p. 339 - 348.
surface-water treatment - reverse-osmosis - membrane systems - pretreatment - ro - realization - innovation - diagnosis
Long-term performance and fouling behavior of four full-scale nanofiltration (NF) plants, treating anoxic groundwater at 80% recovery for drinking water production, were characterized and compared with oxic NF and reverse osmosis systems. Plant operating times varied between 6 and 10 years and pretreatment was limited to 10 µm pore size cartridge filtration and antiscalant dosage (2–2.5 mg L-1) only. Membrane performance parameters normalized pressure drop (NPD), normalized specific water permeability (Kw) and salt retention generally were found stable over extended periods of operation (>6 months). Standard acid–base cleanings (once per year or less) were found to be sufficient to maintain satisfying operation during direct NF of the described iron rich (=8.4 mg L-1) anoxic groundwaters. Extensive autopsies of eight NF membrane elements, which had been in service since the plant startup (6–10 years), were performed to characterize and quantify the material accumulated in the membrane elements. Investigations using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), total organic carbon (TOC) and adenosine triphosphate (ATP) measurements revealed a complex mixture of organic, biological and inorganic materials. The fouling layers that developed during half to one year of operation without chemical cleaning were very thin (
Hygiëne in de luchtvaartcatering.
Beumer, R.R. ; Vrouwenvelder, Th. ; Brinkman, E. - \ 1995
In: Hfdst. 3 in: HACCP een praktische handleiding - p. 30 - 37.
HACCP in de luchtvaartcatering.
Beumer, R.R. ; Vrouwenvelder, Th. ; Brinkman, E. - \ 1994
Voedingsmiddelentechnologie 27 (1994)10. - ISSN 0042-7934 - p. 13 - 16.
luchttransport - luchtvaartuig - dierlijke producten - kiemgetal - bacteriologie - controle - gemaksvoedsel - engineering - voedselinspectie - voedselmicrobiologie - voedselbewaring - voedingsmiddelen - bedrijfsvoering - microbiële ecologie - monitoring - voorgekookt voedsel - voorbereide voedingsmiddelen - ruimtevlucht - statistiek - kwaliteitscontroles - queuing theory - haccp - air transport - aircraft - animal products - bacterial count - bacteriology - control - convenience foods - food inspection - food microbiology - food preservation - foods - management - microbial ecology - precooked foods - prepared foods - space flight - statistics - quality controls
Application of HACCP in airline catering.
Beumer, R.R. ; Vrouwenvelder, T. ; Brinkman, E. - \ 1994
Food Control 5 (1994). - ISSN 0956-7135 - p. 205 - 209.
Successful implementation of HACCP in airline catering.
Brinkman, E. ; Beumer, R.R. ; Vrouwenvelder, T. - \ 1992
In: Proc. 3rd World Congr. Foodborne infections and intoxications Vol. 2, Berlin - p. 942 - 945.
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