Membrane-Based Point-Of-Use Water Treatment (PoUWT) System in Emergency Situations

Shamsuddin, Norazanita; Das, Diganta Bhusan; Starov, Victor

doi:10.1080/15422119.2014.973967

Cited by 17 publications

(12 citation statements)

References 134 publications

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“…Therefore, isolation and enrichment of active peptides with specific molecular weight from WGH were a prerequisite for the application of WGH in high gravity brewing. Ultrafiltration has been widely used in many industrial separation processes (Shamsuddin et al ., ), whereas separation and enrichment of peptides from protein hydrolysates by ultrafiltration were time‐consuming and high cost. Recently, a simple and rapid method of ethanol precipitation has been proposed for enrichment polypeptide complex from chicken egg yolk, which was based on chemicals causing changes in the hydration of ions and dielectric constant of the proteins, and resulted in protein or peptides precipitation (Zambrowicz et al ., ).…”

Section: Introductionmentioning

confidence: 99%

Effects of wheat gluten hydrolysates fractionated by different methods on the growth and fermentation performances of brewer's yeast under high gravity fermentation

Zhou

Yang

Zong

et al. 2017

Int J of Food Sci Tech

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Summary Wheat gluten hydrolysates (WGH) were fractionated through ultrafiltration membrane with molecular weight (Mw) cut‐off of 3 kDa and ethanol precipitation, respectively. WGH and their fractions were used to examine their effects on the growth and fermentation performances of brewer's yeast under high gravity fermentation. Results showed that WGH and their fractions exhibited significant differences in biomass accumulation, viability, ethanol yield, free amino nitrogen and sugar consumptions under high gravity fermentation. Compared to WGH, the fractions with Mw < 3 kDa and the supernatant of WGH treated with ethanol precipitation showed better fermentation performance for brewer's yeast. The relatively lower molecular weight and the higher levels of Leu, Lys, His and Arg in these two fractions might be responsible for their bioactivity for brewer's yeast. Thus, both ultrafiltration and ethanol precipitation could be used as efficient methods for enriching peptides with significant growth‐ and fermentation‐promoting activity for brewer's yeast under high gravity fermentation.

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Section: Introductionmentioning

confidence: 99%

Effects of wheat gluten hydrolysates fractionated by different methods on the growth and fermentation performances of brewer's yeast under high gravity fermentation

Zhou

Yang

Zong

et al. 2017

Int J of Food Sci Tech

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“…Humans require 3-5 liters of clean and safe drinking water every day in order to survive [1]. Man-made and natural disasters can jeopardize this by damaging water supply infrastructure, putting lives at risk through the difficulty of accessing clean and safe drinking water [2,3].…”

Section: Societal Needsmentioning

confidence: 99%

“…Membrane processes such as microfiltration (MF) and ultra-filtration (UF) have been widely used for water treatment in recent years [6,1]. They have been used as alternative technologies to conventional methods such as coagulation, sedimentation, ozonation, granular activated carbon, flocculation/chlorination, slow sand filtration, etc.…”

Section: Societal Needsmentioning

confidence: 99%

Computational Modeling of Coupled Free and Porous Media Flow for Membrane-based Filtration Systems: A Review

Parasyris

Brady

Das

et al. 2019

AMST

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We review different mathematical models proposed in literature to describe fluid-dynamic aspects in membrane-based water filtration systems. Firstly, we discuss the societal impact of water filtration, especially in the context of developing countries under emergency situations, and then review the basic concepts of membrane science that are necessary for a mathematical description of a filtration system. Secondly, we categorize the mathematical models available in the literature as (a) microscopic, if the pore-scale geometry of the membrane is accounted for; (b) reduced, if the membrane is treated as a geometrically lower-dimensional entity due to its small thickness compared to the free flow domain; (c) mesoscopic, if the characteristic geometrical dimension of the free flow domain and the porous domain is the same, and a multi-physics problem involving both incompressible fluid flow and porous media flow is considered. Implementation aspects of mesoscopic models in CFD software are also discussed with the help of relevant examples.

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“…A more practical alternative method and tool is needed to provide clean drinking water during insurgencies, such as in disaster areas, conflict zones, water crises, and other emergencies. Membrane technology driven by applied pressure and osmotic gradients is suitable for use in emergencies [ 6 ]. The membranes commonly used are microfiltration (MF); followed by ultrafiltration (UF), nanofiltration (NF), reverse osmosis (RO), and forward osmosis (FO) [ 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Development of Chitosan/Starch-Based Forward Osmosis Water Filtration Bags for Emergency Water Supply

et al. 2020

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A forward osmosis (FO) membrane was developed from a mixture of chitosan and Dioscorea hispida starch, cross-linked using glutaraldehyde. The cross-linked chitosan/starch membrane was revealed to have high mechanical properties with an asymmetric structure. The prepared membrane’s performance was investigated as an FO filter assembled in a polypropylene water filter bag and aluminum foil plastic. In order to study the FO process, brackish water was used as a feed solution, drawn using three types of solution (fructose, sucrose, and fructose/sucrose mixture, each with 3 M concentration). The maximum water flux (5.75 L/m2 h) was achieved using 3 M sucrose. The cross-linked membrane restrained the ions in the feed with a rejection factor value close to 100%. The water quality parameters were evaluated for the physical, chemical, and biological criteria, such as pH, salinity, conductivity, total dissolved solids (TDS), heavy metals, and Escherichia coli content. The water quality parameters for the FO-processed water met that set by the World Health Organization for drinking water. FO filter bags with cross-linked chitosan/starch membranes can be an option to produce drinking water during an emergency.

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Membrane-Based Point-Of-Use Water Treatment (PoUWT) System in Emergency Situations

Cited by 17 publications

References 134 publications

Effects of wheat gluten hydrolysates fractionated by different methods on the growth and fermentation performances of brewer's yeast under high gravity fermentation

Effects of wheat gluten hydrolysates fractionated by different methods on the growth and fermentation performances of brewer's yeast under high gravity fermentation

Computational Modeling of Coupled Free and Porous Media Flow for Membrane-based Filtration Systems: A Review

Development of Chitosan/Starch-Based Forward Osmosis Water Filtration Bags for Emergency Water Supply

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