Biological treatment of hypersaline wastewater by a biofilm of halophilic bacteria

Woolard, Craig R.; Irvine, Robert L.

doi:10.2175/wer.66.3.8

Cited by 132 publications

(56 citation statements)

References 6 publications

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“…More over, increased salinity decreases the degradation of the number or type of substrate and the ability of some microorganisms (Sing, 2006;Obuekwe, 2005). In addition, biodegradation by microorganisms in the present salinity was slow, because this environment tends to disrupt cell membrane, denature some proteins, change osmotic force which any of these situation could be lethal (Woolard & Irvine, 1994;Kargi & Dinçer, 2000).…”

Section: Results and Discussion Screening And Isolating Fungimentioning

confidence: 98%

Simple Screening for Potential Chrysene Degrading Fungi

Hidayat¹,

Tachibana

2015

KLS

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Chrysene is a class of organic compounds, arranged in four benzene rings, and a polycyclic aromatic hydrocarbon (PAH), It has been found to have a variety of toxicity, mutagenicity, teratogenicity, and carcinogenicity on microorganisms, plants and animals in environment. Nowadays, the most attention on degradation of PAHs is investigating degradation of high-molecular-weight molecules. However, microbes which have ability to degrade PAHs containing more than three benzene rings are more difficult to be obtained. In order to provide chrysene degrading fungi, this study was conducted for screening, and isolating the fungi from soil, and hence investigating the selected fungi having high chrysene degradation activity. From the 62 soil samples collected from Matsuyama-Japan, 92 isolates were found and 20 isolates of them grew well in Malt extract media contaminated with chrysene (covered up 90%). Among them, a fungus, Fusarium sp. has the highest activity to degrade chrysene compared to others screened fungi. This fungus was evaluated further on liquid medium from distilled water and sea water to confirm their validity in degrading chrysene. The result showed that Fusarium sp. F092 degraded 48% of chrysene, where the chrysene degradation showed no differences at salinity of 35 o / oo . The effect of variation of enzymes activities on incubation times was evaluated simultaneously. When the fungus was grown in a liquid culture, the highest activity of 1,2-dioxygenase reached 203.5 UL -1 were observed on 30 days incubation and 29.7 Ul -1 for 2,3-dioxygenase on 40 days incubation. The products of chrysene degradation by Fusarium sp. F092 are, 1-hydroxy 2-napthoic acid and catechol. In conclusion, Fusarium sp. F092 shows a high potential activity degrade PAHs contamination .

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Section: Results and Discussion Screening And Isolating Fungimentioning

confidence: 98%

Simple Screening for Potential Chrysene Degrading Fungi

Hidayat¹,

Tachibana

2015

KLS

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“…A techno-economic model would form an important input into scale-up design strategies. Improvements in MABR performance may also be gained by further exploration of non-continuous operation, such as sequencing batch MABRs 41,[73][74][75] , or by novel hybrid designs that combine the MABR with other technologies [38][39][40][41][42] . There is also a continuing need for basic research into fundamental mechanisms governing MABR performance.…”

Section: Outlook and Priorities For Technology Developmentmentioning

confidence: 99%

Membrane-Aerated Biofilms for High Rate Biotreatment: Performance Appraisal, Engineering Principles, Scale-up, and Development Requirements

Syron

Casey

2008

Environ. Sci. Technol.

222

126

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RECEIVED DATE (to be automatically inserted after your manuscript is accepted if required according to the journal that you are submitting your paper to)Running title: membrane-aerated biofilms for high-rate biotreatment. Phone +35317161877ABSTRACT: Diffusion of the electron acceptor is the rate controlling step in virtually all biofilm reactors employed for aerobic wastewater treatment. The membrane-aerated biofilm reactor (MABR) is a technology that can deliver oxygen at high rates and transfer efficiencies, thereby enhancing the biofilm activity. This paper provides a comparative performance rate analysis of the MABR in terms of its application for carbonaceous pollutant removal, nitrification/denitrification and xenobiotic biotreatment. We also describe the mechanisms influencing process performance in the MABR and the inter-relationships between these factors. The challenges involved in scaling-up the process are discussed with recommendations for prioritization of research needs.`

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“…However, the mechanism of aerobic granulation in treatment of saline wastewater is still unknown 7 . Bio-treatment of hypersaline wastewater by pure halophilic bacteria has been investigated in various biofilms and SBR 14,22 .…”

Section: Introductionmentioning

confidence: 99%

Removal of BOD5 and COD From Saline Wastewater Using Fixed Bed Column of Aspergillus Oryzae and Halobacillus Dabanensis

Ghaed

Marandi

Mazhar

2015

Curr. World Environ

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5-day BOD and COD can be removed by biological aerobic treatment of saline wastewater. In this research, halophilic microorganisms, namely Aspergillus oryzae and Halobacillus dabanensis were isolated from a return sludge basin of a wastewater treatment plant in the City of Bandar Abbas in southern Iran , that contained a Total Dissolved Solid (TDS) of about 7500 mg l -1 . These microorganisms (bacteria and fungi) could tolerate 20% concentration of salt (NaCl) in Sabouraud-4% dextrose agar and Sabouraud-2% dextrose broth medium and brain heart (BHI) agar and BHI broth medium. The films of Aspergillus oryzae and Halobacillus dabanensis were formed around the Caalginate. These bioflims were introduced to a fixed bed column, on top of which saline wastewater was released with flow rates of 2-6 ml min . The removal process in fixed bed column was stopped after 1200 minutes.

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Biological treatment of hypersaline wastewater by a biofilm of halophilic bacteria

Cited by 132 publications

References 6 publications

Simple Screening for Potential Chrysene Degrading Fungi

Simple Screening for Potential Chrysene Degrading Fungi

Membrane-Aerated Biofilms for High Rate Biotreatment: Performance Appraisal, Engineering Principles, Scale-up, and Development Requirements

Removal of BOD5 and COD From Saline Wastewater Using Fixed Bed Column of Aspergillus Oryzae and Halobacillus Dabanensis

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