Cleaning of fouled ultrafiltration (UF) membrane by algae during reservoir water treatment

Liang, Heng; Gong, Weijia; Chen, Jie; Li, Guibai

doi:10.1016/j.desal.2007.01.033

Cited by 103 publications

(38 citation statements)

References 10 publications

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“…Physical cleaning generally uses mechanical forces to remove foulants from the membrane surface [124] and such methods include backflush/forward flush/reverse flush, scrubbing (e.g. using foam balls for tubular modules), air sparging, CO 2 back permeation, vibration and sonication.…”

Section: Organicsmentioning

confidence: 99%

Fruit Juice Processing and Membrane Technology Application

et al. 2011

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This article provides an overview of recent developments and the published literature in membrane technology with regard to fruit juice processing and considers the impact of such technology on product quality. In the fruit juice industry, membrane technology is used mainly to clarify the juice by means of ultrafiltration and microfiltration and to concentrate it by means of nanofiltration and reverse osmosis. We look at enzyme immobilization techniques to improve filtration performance and operation methods to quantify fouling. Membrane fouling is a critical issue and inhibits the broader application of membranes in the fruit production industry. Pectin and its derivatives form a gel-like structure over the membrane surface, thereby reducing the permeate flux. In order to degrade pectin, the raw juice is usually subjected to an enzymatic treatment with pectinase, which hydrolyses pectin and causes its protein complexes to flocculate. The resulting juice has reduced viscosity and a much lower pectin content, which is advantageous in the subsequent filtration processes.

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Section: Organicsmentioning

confidence: 99%

Fruit Juice Processing and Membrane Technology Application

et al. 2011

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“…Traditional pretreatment processes include coagulation, adsorption, and oxidation. The use of coagulation pretreatment is effective for reducing macromolecular organics but is ineffective for removing small molecular organics [15]. Powered active carbon (PAC) can efficiently remove low molecular AOM, but a high dose of PAC may be required [16,17].…”

Section: Introductionmentioning

confidence: 99%

A membrane combined process to cope with algae blooms in water

et al. 2015

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“…Non-conventional physical cleaning methods are the application of ultrasonic [12][13][14], electrical fields [15] and magnetic fields [16][17] with different results. Hydraulic cleaning methods are often adopted in UF for drinking water treatment [18].…”

Section: Physical Cleaningmentioning

confidence: 99%

“…Chemicals were chosen according to the membrane manufacturer's recommendations, bibliography consulted [9,18,33] and also considering its affordability, low cost and world-wide extension.…”

Section: Cleaning Strategies Under the Scope Of The Aquapot Projectmentioning

confidence: 99%

Cleaning of ultrafiltration membranes after the treatment of surface water: static–dynamic test

García-Fayos

Arnal

Sancho

2012

Desalination and Water Treatment

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Access to safe drinkable water is a basic human right and an international development goal. AQUAPOT international project, created by Chemical and Nuclear Engineering Department of the Polytechnic University of Valencia, has been focused on research and development of low-cost and effective water treatment technologies based on membrane technology able to be used in developing countries. After several years of intensive laboratory and field research, Aquapot's UF plants have been settled in different locations of Ecuador (province of Azuay) and Mozambique (province of Maputo). At present, most of the installed plants work successfully, producing drinking water suitable for human consumption and even for industrial use. However, installation of the designed UF-drinking water treatment facilities has shown that cleaning standard protocol of ultrafiltration membranes is not effective. This fact could affect microbiological quality and volume of the pure water produced and also life of the membrane and the UF-plant. In order to develop optimized cleaning protocols based on the use of common and accessible chemicals, Aquapot started an applied research studying several cleaning methods. Previous studies have been focussed in applying different types of cleaning: chemical cleaning (by means of static tests and dynamic tests) and physico-chemical cleaning (combining chemical reagents with the hydrodynamic action of air bubbles). This work describes the experimental procedure performed in static-dynamic cleaning test which combine soaking with dynamic circulation of cleaning solutions. Sodium hypochlorite and Hydrogen Peroxide at 25 ºC performed the best results, recovering permeate flux from 10 to 12 times respectively compared with fouled membranes. Main results obtained for the different chemical solutions tested at 25 and 40 ºC were also compared with previous chemical (static and dynamic test) and physico-chemical cleanning. Results showed that the tested cleaning protocol improves the effectiveness of the cleaning and recovers UF membrane performance even until 30 times, when sequence of cleaning is Sodium hypochlorite followed by hydrogen peroxide.

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Cleaning of fouled ultrafiltration (UF) membrane by algae during reservoir water treatment

Cited by 103 publications

References 10 publications

Fruit Juice Processing and Membrane Technology Application

Fruit Juice Processing and Membrane Technology Application

A membrane combined process to cope with algae blooms in water

Cleaning of ultrafiltration membranes after the treatment of surface water: static–dynamic test

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