Biokinetics of biodegradation of surfactants under aerobic, anoxic and anaerobic conditions

Mohan, Prasanna K.; Nakhla, George; Yanful, Ernest K.

doi:10.1016/j.watres.2005.11.030

Cited by 147 publications

(60 citation statements)

References 19 publications

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“…Do oczyszczania tego typu ście-ków stosowane są procesy biologiczne [3] prowadzone w warunkach tlenowych [8, 9, 10,] lub beztlenowych [2,7]. Największe zastosowanie mają jednak układy dwustopniowe beztlenowe lub beztlenowo -tlenowe [11,12]. Zatem istnieje potrzeba oceny w jakim stopniu związki organiczne zawarte w ściekach z produkcji olejów jadalnych i margaryny ulegają przemianom podczas procesów biochemicznych.…”

Section: Wstępunclassified

Analysis of Organic Matter Transformations During Wastewater Anaerobic Treatment From Production of Edible Fats

Przywara¹

2015

Inż. Ekolog.

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STRESZCZENIEW artykule analizowano przemiany materii organicznej podczas beztlenowego oczyszczania ścieków z produkcji olejów i tłuszczów pochodzenia roślinnego. W artykule opisano charakterystykę zanieczyszczeń organicznych, uwzględniającą ich podział na związki biodegradowalne oraz nie podatne na biologiczny rozkład. W celu dokonania oznaczeń fizykochemicznych zastały pobrane próbki ścieków nieoczyszczonych (przemysłowych) oraz ście-ków oczyszczonych. Metodyka oznaczeń frakcji ChZT została opracowana na podstawie wytycznych ATV-131. Efektem beztlenowego oczyszczania ścieków tłuszczowych było obniżenie udziału substancji biodegradowalnych z 64,1% do 44,2% i wzrost udziału związków niebiodegradowlnych z 35,9% do 55,8%.Słowa kluczowe: ścieki z produkcji tłuszczów jadalnych, frakcje ChZT, substancje organiczne biodegradowalne. ANALYSIS OF ORGANIC MATTER TRANSFORMATIONS DURING WASTEWATER ANAEROBIC TREATMENT FROM PRODUCTION OF EDIBLE FATS ABSTRACTIn this paper, transformations of organic matter during anaerobic treatment of wastewater from the production of edible fats were analyzed. The paper describes a method for characterization of organic pollutants, taking into account their division into biodegradable compounds and not susceptible to biological degradation. In order to make physicochemical determinations, the following types of wastewater samples were collected: non-treated and treated. Methodology for COD fractions determination was developed on the basis of the guidelines ATV-131. The effect of anaerobic treatment of wastewater from production of edible fats was to decrease the proportion of biodegradable compounds from 64.1% to 44.2% and increase the proportion of non-biodegradable compounds from 35.9% to 55.8%.

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Section: Wstępunclassified

Analysis of Organic Matter Transformations During Wastewater Anaerobic Treatment From Production of Edible Fats

Przywara¹

2015

Inż. Ekolog.

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“…Biosurfactants, which increase the surface area of hydrophobic water-insoluble substrates can be added to the bioremediation processes to stimulate the growth of oil-degrading bacteria and improve their ability to degrade hydrocarbons (Bodour et al, 2003). Unlike synthetic surfactants, microbialbiosurfactant are easily degraded, effective and particularly suited for environmental applications such as bioremediation and dispersion of oil spills (Mohan et al, 2006). The aim of this study was to isolate, characterize and screen bacterial species from different hydrocarbon polluted sites for biosurfactant production.…”

Section: Introductionmentioning

confidence: 99%

Biosurfactants producing bacteria from oil-polluted soil in Abeokuta, Ogun State

Adebajo¹,

Akintokun²,

Bolaji³

2018

Ife Journal of Science

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Biosurfactants are amphiphilic compounds produced by a variety of microorganisms as extracellular compounds. Biosurfactants are preferable over the chemical surfactant because of their effectiveness, degradability and environmentally friendly nature. This study focuses on the isolation, identification and screening of biosurfactants-producing bacteria. Soil samples were collected from different automobile shops in Abeokuta, Ogun State. Bacteria were isolated and screened for their ability to produce biosurfactant using different methods in a stepwise process such as haemolytic test, drop collapse test, bacterial adhesion to hydrocarbon test and the confirmatory test which was the emulsification test that was assayed every 4 hours. Forty-one bacteria isolates showed beta-haemolysis, 20 exhibited alpha haemolysis and 47 exhibited gamma haemolysis. All positive isolates from the beta haemolytic test were screened for drop collapse test and result showed that 14 isolates were positive to the drop-collapse test. The isolates adhered to hydrocarbon at different rates. Proteus mirabilis had the lowest hydrophobicity value of 41% and the highest was Pseudomonas aeruginosa with a hydrophobicity value of 72%. The result showed that Pseudomonas aeruginosa had the maximum emulsification capacity of 65% at 24 hours while the least emulsification capability for biosurfactant production was exhibited by Proteus mirabilis (43%). This result showed that P. aeruginosa is a better organism for biosurfactant production and are good choice of organisms in many industries because of their emulsion capability.Keywords: Biosurfactant, Bacteria, Hydrocarbon, Soil, Screening ABSTRACT 287

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“…The advantages of biosurfactants include lower cellular toxicity and ready biodegradability [20,21]. In addition, they are more attractive from an environmental perspective for SER processes [22].…”

Section: Introductionmentioning

confidence: 99%

Sorption of triclosan onto sediments and its distribution behavior in sediment–water–rhamnolipid systems

Lin

Zhang

et al. 2011

Environmental Toxicology and Chemistry

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Triclosan has been commonly used as an antimicrobial and disinfectant agent. Distribution between water and sediment plays a key role in its occurrence, transfer, and fate in the aquatic environment. Sorption of triclosan onto sediments and the effect of the biosurfactant rhamnolipid on distribution were studied in the present work. Batch equilibrium experiments were performed on three different sediments, with a wide triclosan concentration range. S-shaped equations can be used to describe the sorption behavior when triclosan concentration is relative high (50-250 µg · g⁻¹). The Pearl River, China (PR), sediment, which has the largest cumulative volume of pores, appeared to have great capability for continuously capturing triclosan. In the lower concentration range (10-150 µg · g⁻¹) assays, linear and Freundlich equations fitted the sorption isotherm data well. The pH value of sediment appeared to have a significant influence on sorption of low triclosan concentrations. Formation of rhamnolipid micelle remarkably decreased the sediment-water distribution ratio, K(d)*. Evaluation of the distribution efficiency, E, suggested that pores of sediment might have played a role in triclosan distribution, whereas sediment organic matter bound triclosan and reduced solubilization of triclosan. Rhamnolipid appears to be a good sorbent for triclosan. The findings of the present study suggest that, to understand the sorption and distribution of triclosan fully, studies should be carried out over a relatively broad concentration range.

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Biokinetics of biodegradation of surfactants under aerobic, anoxic and anaerobic conditions

Cited by 147 publications

References 19 publications

Analysis of Organic Matter Transformations During Wastewater Anaerobic Treatment From Production of Edible Fats

Analysis of Organic Matter Transformations During Wastewater Anaerobic Treatment From Production of Edible Fats

Biosurfactants producing bacteria from oil-polluted soil in Abeokuta, Ogun State

Sorption of triclosan onto sediments and its distribution behavior in sediment–water–rhamnolipid systems

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