Membrane bioprocesses for the denitrification of drinking water supplies

Chang, Jian; Manem, J.; Beaubien, A.

doi:10.1016/0376-7388(93)85147-o

Cited by 33 publications

(22 citation statements)

References 2 publications

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“…The data show that membrane separation offers an effective means of Fe 3+ removal from the treated water with 92% removal being achieved at pH 2.3 and complete removal at pH 5.0. The increased removal at the higher pH is due to the increasing precipitation of Fe(OH) 3 with increasing pH. The data show that J * P also increased with increasing pH due to increased Fe(OH) 3 precipitation.…”

Section: Membrane Separationmentioning

confidence: 67%

“…The total height of the reactor and the inner diameter were 100 cm and 3.1 cm, respectively, giving a total volume (V T ) of 755 cm 3 of which only 551 cm 3 (73 cm height) was packed with 84.8 g sterilised vegetable sponge (L cylindrica). The void volume in the active section of the reactor was determined experimentally to be 260 cm 3 before the development of biofilm.…”

Section: Reactormentioning

confidence: 99%

“…4,5 MBR applications in biological wastewater treatment processes have, therefore, received increased attention. 3 Fig 1. As seen from the figure the oxidation reaction with alkali addition is practically impossible until a pH value of around 7 is reached. Because of this, conventional treatment processes operate usually at pH values between 7 and 7.5.…”

Section: Introductionmentioning

confidence: 97%

“…Combined with no net CO 2 addition to the atmosphere, the system offers an environmentally friendly technology for wastewater treatment. Advantages of the presents system are (a) no additional carbon source is required for biological growth, (b) alkali requirement is minimal due to biological oxidation at pH values less than 2.5, and (c) space savings mainly due to the membrane separation system used for the separation of Fe(OH) 3 . The present system, thus, can be characterised as process intensification.…”

Section: Introductionmentioning

confidence: 99%

“…2 Recent developments in membrane technology have prompted the use of membrane processes as an alternative to sand and active carbon filtration beds as post-treatment processes. 3 A bioreactor integrated to a membrane module system is usually referred to as a membrane bioreactor (MBR). Membranes, depending on the type and the pore size, are able to separate mixed liquor suspended solids (MLSS) and solid contaminants such as carbon source residues.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Process intensification in wastewater treatment: ferrous iron removal by a sustainable membrane bioreactor system

Pekdemir

Keskinler

Yildiz

et al. 2003

J of Chemical Tech & Biotech

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Increasing the flowrate of the inlet wastewater caused a reduction in conversion rate. The oxidation rate reduced along the reactor height as the wastewater moved towards the exit at the top but conversion showed the opposite trend. Increasing Fe 2+ concentration up to a critical point resulted in an increased oxidation rate but beyond the critical point caused the oxidation rate to decrease. Luffa cylindrica displayed suitable characteristics for use as a support matrix for formation of a Thiobacillus ferrooxidans biofilm and showed promising potential as an ecological and sustainable alternative to existing synthetic support materials. Membrane separation was shown to be a very effective means of Fe 3+ removal from the wastewater with removal changing from 92% at pH 2.3 to complete removal at pH 5.0.

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Section: Membrane Separationmentioning

confidence: 67%

Section: Reactormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Process intensification in wastewater treatment: ferrous iron removal by a sustainable membrane bioreactor system

Pekdemir

Keskinler

Yildiz

et al. 2003

J of Chemical Tech & Biotech

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Mechanism of charged pollutants removal in an ion exchange membrane bioreactor: Drinking water denitrification

Велизаров

Rodrigues

Reis

et al. 2000

Biotechnol. Bioeng.

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Loofa (Luffa cylindrica) sponge: Review of development of the biomatrix as a tool for biotechnological applications

Saeed¹,

Iqbal²

2013

Biotechnology Progress

101

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The review discusses the development of loofa sponge (Luffa cylindrica) as a biotechnological tool and the diversity of applications in which it has been successfully used since it was first reported as a matrix for the immobilization of microbiological cells in 1993. The fibro-vascular reticulated structure, made up of an open network of random lattices of small cross-sections coupled with very high porosity (79-93%), having very low density (0.02-0.04 g/cm(3) ), and high specific pore volume (21-29 cm(3) /g), has the characteristics of a carrier/scaffold well-suited for cell immobilization. This has been confirmed through the immobilization of cells of diverse types, including filamentous and microalgae, fungi, bacteria, yeasts, higher plants, and human and rat hepatocytes. The cells immobilized in loofa sponge have performed well and better than free suspended cells and those immobilized in conventionally used natural and synthetic polymeric materials for the production of ethanol, organic acids, enzymes, and secondary metabolites. The loofa-immobilized cell systems have been efficiently used for the treatment of wastewaters containing toxic metals, dyes, and chlorinated compounds, and the technology has been used to develop biofilms for the remediation of domestic and industrial wastewaters rich in inorganic and organic matter. In addition, three-dimensional loofa sponge scaffolds for hepatocyte culture have been suggested to have the potential for development into a bioartificial liver device. Loofa sponge is a cost-effective, eco-friendly, and easy to handle matrix that has been used successfully as a biotechnological tool in a variety of systems, purposes, and applications.

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Membrane bioprocesses for the denitrification of drinking water supplies

Cited by 33 publications

References 2 publications

Process intensification in wastewater treatment: ferrous iron removal by a sustainable membrane bioreactor system

Process intensification in wastewater treatment: ferrous iron removal by a sustainable membrane bioreactor system

Mechanism of charged pollutants removal in an ion exchange membrane bioreactor: Drinking water denitrification

Loofa (Luffa cylindrica) sponge: Review of development of the biomatrix as a tool for biotechnological applications

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