Monitoring and controlling biofouling in an integrated membrane system

Boorsma, M.J.; Dost, Simon; Klinkhamer, S.; Schippers, J.C.

doi:10.5004/dwt.2011.2352

Cited by 14 publications

(7 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure shows the results from the 34 mil STD coupon. Most of the biofouling was accumulated on the feed side of the first element of an RO system, as previously reported . The distribution of biofouling accumulation was similar to that observed on the fouled MFS coupons from the wastewater test (Figure ).…”

Section: Resultssupporting

confidence: 85%

See 1 more Smart Citation

Comparing Biofouling Development in Membrane Fouling Simulators and Spiral-Wound Reverse Osmosis Elements Using River Water and Municipal Wastewater

Massons-Gassol¹,

Gilabert-Oriol²,

Johnson³

et al. 2017

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Membrane fouling simulators (MFS) are flat cell units to simulate the biofouling development of spiral-wound reverse osmosis (RO) elements. MFS units and two RO testing systems were operated in parallel, using different water types. Differences in differential pressure increase and fouling distribution between the two pilot plants were evaluated. Several RO elements and MFS units were operated with the same conditions to assess the reliability of the testing systems. In a second study, the performance of different feed spacer types assembled in full-scale RO elements was compared to the same feed spacer types assembled in the MFS unit. These studies showed that the relative biofouling impact in the MFS units was equivalent to the performance of the RO elements. Additionally, the results from the second study provide indications that a prototype 28 mil feed spacer (28 T1) may provide more significant additional biofouling resistance than any of the other spacers evaluated.

show abstract

Section: Resultssupporting

confidence: 85%

“…Most of the biofouling was accumulated on the feed side of the first element of an RO system, as previously reported. 22 The distribution of biofouling accumulation was similar to that observed on the fouled MFS coupons from the wastewater test (Figure 6). The biofilm was a sticky yellowish slime, mostly attached on the feed spacer strands.…”

Section: Resultssupporting

confidence: 73%

Comparing Biofouling Development in Membrane Fouling Simulators and Spiral-Wound Reverse Osmosis Elements Using River Water and Municipal Wastewater

Massons-Gassol¹,

Gilabert-Oriol²,

Johnson³

et al. 2017

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…The outcomes of this study show that continuous DBNPA dosage of 1 mg/L can prevent biofouling, but the biocide does not have a curative effect for DBNPA concentrations up to 20 mg/L. and chemical cleaning frequency [36,37]. A continuous high DBNPA dosage of 20 mg/L on fouled membranes caused a significant decrease in cleaning frequency due to the stabilization of the pressure drop.…”

Section: Discussionmentioning

confidence: 84%

“…The rejection of DBNPA by membranes has already been studied on industrial scale modules [18]. A few papers mention the use of on-line shock dosages of the biocide [36] but limited information is provided on the efficiency of this application. As continuous dosage of 20 mg/L of DBNPA did not remove the pre-grown biofilm in the MFS, no curative effect on the existing biofilm may be expected by applying shock dosages with the same DBNPA concentration.…”

Section: Discussionmentioning

confidence: 99%

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

Siddiqui¹,

Pinel²,

Prest³

et al. 2017

Desalination and Water Treatment

View full text Add to dashboard Cite

I.; Prest, E.I.; Bucs, Szilard; van Loosdrecht, M.C.M.; Kruithof, J.C.; Vrouwenvelder, Johannes S. Citation Siddiqui A, Pinel I, Prest EI, Bucs SS, van Loosdrecht MCM, et al. (2017) Application of DBNPA dosage for biofouling control in spiral wound membrane systems. DESALINATION AND WATER TREATMENT 68: 12-22. Available: http://dx.a b s t r a c tBiocides 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-nitrilopropionamide (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.

show abstract

“…Many monitors have been developed to study biofilm growth [15][16][17][18][19]. Most monitors were designed to simulate biofouling in heat exchangers, cooling towers, and water distribution networks [20,21], and were not representative for biofouling in membrane systems.…”

Section: Introductionmentioning

confidence: 99%

Development of a setup to enable stable and accurate flow conditions for membrane biofouling studies

Bucs

Farhat

Siddiqui

et al. 2016

Desalination and Water Treatment

View full text Add to dashboard Cite

A B S T R A C TSystematic laboratory studies on membrane biofouling require experimental conditions that are well defined and representative for practice. Hydrodynamics and flow rate variations affect biofilm formation, morphology, and detachment and impacts on membrane performance parameters such as feed channel pressure drop. There is a suite of available monitors to study biofouling, but systems to operate monitors have not been well designed to achieve an accurate, constant water flow required for a reliable determination of biomass accumulation and feed channel pressure drop increase. Studies were done with membrane fouling simulators operated in parallel with manual and automated flow control, with and without dosage of a biodegradable substrate to the feedwater to enhance biofouling rate. High flow rate variations were observed for the manual water flow system (up to ≈9%) compared to the automatic flow control system (<1%). The flow rate variation in the manual system was strongly increased by biofilm accumulation, while the automatic system maintained an accurate and constant water flow in the monitor. The flow rate influences the biofilm accumulation and the impact of accumulated biofilm on membrane performance. The effect of the same amount of accumulated biomass on the pressure drop increase was related to the linear flow velocity. Stable and accurate feedwater flow rates are essential for biofouling studies in well-defined conditions in membrane systems.

show abstract

Monitoring and controlling biofouling in an integrated membrane system

Cited by 14 publications

References 5 publications

Comparing Biofouling Development in Membrane Fouling Simulators and Spiral-Wound Reverse Osmosis Elements Using River Water and Municipal Wastewater

Comparing Biofouling Development in Membrane Fouling Simulators and Spiral-Wound Reverse Osmosis Elements Using River Water and Municipal Wastewater

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

Development of a setup to enable stable and accurate flow conditions for membrane biofouling studies

Contact Info

Product

Resources

About