Coagulation/submerged hollow-fibre ultrafiltration for natural organic matter removal

Machenbach, Ingo; Leiknes, TorOve; Ødegaard, Hallvard

doi:10.2166/ws.2003.0195

Cited by 6 publications

(3 citation statements)

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“…The used membrane had an outside/in hollow fiber configuration with a molecular weight cut off (MWCO) of 400 kDa [45]. The used ultrafiltration membrane was selected based on the good removal results that have been achieved by Ødegaard et al in their previous work [46][47][48]. The permeate was used for the fouling tests.…”

Section: Ultrafiltration Systemmentioning

confidence: 99%

Investigation of the fouling effect on a commercial semi-permeable membrane in the pressure retarded osmosis (PRO) process

Abbasi-Garravand

Mulligan

Laflamme

et al. 2018

Separation and Purification Technology

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One of the main challenges for generating osmotic power by using PRO technology is the membrane fouling which reduces the permeate flux and consequently increases the cost and decreases the osmotic power generation. In this research, different feed waters with various qualities were used to investigate the effect of fouling on a commercial membrane in PRO mode in continuous conditions. Also, the fouling mechanisms were investigated in order to study the cleaning of the membrane in PRO mode in the future research. In addition, four classic fouling models such as complete blocking model (CBM), intermediate blocking model (IBM), standard blocking model (SBM) and cake filtration model (CFM) were used. Cake enhanced osmotic pressure as a new mechanism for osmotically driven membranes was studied as well. According to the results, the fouling rate when the draw solution was synthetic salt water followed the order of: untreated river water > multimedia sand filter > microfiltration > ultrafiltration effluents. The fouling rate in ultrafiltration and microfiltration effluents using sea water occurred faster compared to the results for untreated synthetic salt water. Complete fouling (permeate flux was negligible) 2 occurred after 580 hours using feed water from ultrafiltration unit. It was observed that cake filtration and cake enhanced osmotic pressure were the main fouling mechanisms that governed the membrane fouling. These models could describe the membrane fouling in PRO processes.

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Section: Ultrafiltration Systemmentioning

confidence: 99%

Investigation of the fouling effect on a commercial semi-permeable membrane in the pressure retarded osmosis (PRO) process

Abbasi-Garravand

Mulligan

Laflamme

et al. 2018

Separation and Purification Technology

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“…Machenbach et al 2002). Figure 5 shows the removal of NOM during the different experimental phases, measured as UVA 254 and DOC.…”

Section: Filtrate Qualitymentioning

confidence: 99%

Influence of hybrid coagulation-ultrafiltration pretreatment on trace organics adsorption in drinking water treatment

Müller

Uhl

2009

Journal of Water Supply: Research and Technology-Aqua

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S. Mü ller W. Uhl (corresponding author) Institute of Urban Water Management (ISI), Chair of Water Supply Engineering,The treatment of raw water by hybrid coagulation-ultrafiltration was investigated. Coagulationultrafiltration removed high molecular weight organics, preferentially humics. Adsorption of the trace compound cis-1,2-dichloroethene, present in raw water, on granular activated carbon was improved considerably as compounds competing for adsorption space had been removed.This was shown in isotherms and breakthrough curves. Aeration during filtration did not affect membrane performance as expressed in permeability. However, aeration in the submerged membrane container resulted in a release of organic matter from the flocs, which resulted in higher concentrations of dissolved organic carbon in the filtrate. ABBREVIATIONS BV bed volumes (m 3 m 23 ) c concentration (mg l 21 or mol l 21 ) c 0 initial concentration (mg l 21 ) c eq liquid-phase concentration at adsorption equilibrium (mg l 21 ) CDOC chromatographic detectable organic carbon (ppb) DCE cis-1,2-dichloroethene (mg l 21 ) DOC dissolved organic carbon (mg l 21 or ppb) FNU formazine nephelometric unit GAC granular activated carbon HPC heterotrophic plate count (ml 21 ) HOC hydrophobic organic carbon (ppb) K F Freundlich parameter (mg g 21 ) LC-OCD liquid chromatography-organic carbon detection l det detection limit m mass of adsorbent (mg) MWCO molecular weight cut-off (Dalton) n number of measurements n F Freundlich exponent NOM natural organic matter OC organic carbon (ppb) P membrane permeability (l m 22 h 21 kPa 21 ) P 0 initial permeability (l m 22 h 21 kPa 21 ) q solid-phase concentration at adsorption equilibrium (mg g 21 ) TMP transmembrane pressure (hPa or kPa) TOC total organic carbon (ppb) UF ultrafiltration UVA 254 ultra violet absorbance at 254 nm (m 21 )

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“…Sanghi and Bhattacharya (2003) Machenbach et al (2003) carried out experiments on the removal of humic substances from highly colored water by using coagulation and outside-in hollow-fiber membrane filtration. Abdessemed et al (2003) tested the coagulation-adsorption-ultrafiltration treatment for reuse of primary effluent.…”

Section: Mixed Processesmentioning

confidence: 99%

Physico‐Chemical Processes

Ahmad¹,

Begum²,

Hoek³

et al. 2004

Water Environment Research

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In this chapter, the physicochemical processes used in the treatment of aqueous streams such as domestic and industrial wastewaters, drinking water, contaminated groundwater, and aqueous residuals from soil treatment are reviewed. Processes that have their own chapter in the WEF review are not included in this chapter. MEMBRANE PROCESSES GENERALMembrane technology is widely accepted as a means of producing various qualities of water from surface water, well water, brackish water, and seawater.Membrane technology is also used in industrial processes and in industrial wastewater treatment, and lately membrane technology has moved into the area of treating secondary and tertiary municipal wastewater and oil field produced water (Nicolaisen, 2003). In many cases one membrane process is followed by another with the purpose of producing water of increasing purity and quality for various purposes. One type of membrane may thus enhance the function of another to meet goals ranging from disposal of wastewater to production of drinking water from alternative sources. 824 Membrane technologies offer the possibility of managing the total water resources in a region, which is of special interest in geographical areas where natural water resources are scarce. A recent project entitled Novel Technologies for Drainage Water Treatment financed by Egyptian Academy of Scientific Research and Technology (ASRT) and executed by National Research Center (NRC) comprised a detailed assessment of the desalting technologies for reclamation of agricultural drainage water (ADW) (Abulnour et al., 2003). This paper addresses the comparative techno-economics of the following systems (a) activated carbon (AC)-ultrafiltration (UF)-reverse osmosis (RO), (b) UF-electrodialysis reversal (EDR)-RO, (c) AC-ED-ion exchange (IE), (d) microfiltration (MF)-UF-RO1-RO2 and (e) slow sand filtration (SSF)-AC-IE. The results reveal that treatment scheme (d) MF-UF-RO1-RO2 provides the lowest cost production of high quality water. The most important recommendations point to the importance of field demonstration in selected locations to explore system reliability and performance under actual applications.The increasing need for water in arid regions of the world has resulted in the emergence of new water re-use technologies. The success of water re-use projects however, does not just depend on the effectiveness and suitability of the technology, but also on the presence of an institutional framework that ensures that the treated water can be distributed and used safely and efficiently. These two diverse issues were examined by MWH in projects carried out in Egypt and in the USA (Lawrence et al., 2003). One project in the East Bank of Cairo assessed the potential benefits of treated wastewater for irrigation in agricultural schemes. The project demonstrated enhanced 825 crop yields but that additional treatment of the wastewater was required to improve its microbiological quality to the standards required by both international and Egyptian legislation for safe re...

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Coagulation/submerged hollow-fibre ultrafiltration for natural organic matter removal

Cited by 6 publications

References 0 publications

Investigation of the fouling effect on a commercial semi-permeable membrane in the pressure retarded osmosis (PRO) process

Investigation of the fouling effect on a commercial semi-permeable membrane in the pressure retarded osmosis (PRO) process

Influence of hybrid coagulation-ultrafiltration pretreatment on trace organics adsorption in drinking water treatment

Physico‐Chemical Processes

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