نتایج جستجو برای: فیکساتیو پیآاف phenol

تعداد نتایج: 16079  

Journal: :iranian journal of public health 0
a.r. yazdanbakhsh; a.r. mesdaghinia; a. torabian; m. shariat

in this study two identical anaerobic completely mixed fluidized bed reactors with gac and sand media were employed for cod & phenol removal. at loading rate of 1.6 g phenol l-1d-1, the efficiency of phenol removal in gac & sand reactors were 97.7% & 74%, respectively. at high loading rate of phenol (6.09 g phenol i: 1d1) the efficiency of phenol removal in gac reactor was better than 95%. in g...

Journal: :Chemosphere 2007
Irama Sanchez Frank Stüber Josep Font Agustí Fortuny Azael Fabregat Christophe Bengoa

This work deals with a new abiotic oxidation process designed as a suitable pre-treatment step within a biological depuration of wastewater containing phenol or its derivatives (o-cresol, 2-chlorophenol and p-nitrophenol) or aniline. The reaction was carried out in a stirred tank reactor at 20 degrees C and atmospheric pressure in presence of the organic compound, 150mgl(-1), zero valent iron p...

Journal: :Journal of hazardous materials 1999
V M Hebatpuria H A Arafat H S Rho P L Bishop N G Pinto R C Buchanan

In this research, we investigated the use of an inexpensive thermally regenerated activated carbon as a pre-adsorbent in the solidification/stabilization of phenol-contaminated sand. Our results show that even the addition of very low amounts of regenerated activated carbon (1%-2% w/w sand) resulted in the rapid adsorption of phenol in the Chemical solidification/stabilization (S/S) matrix, wit...

2008
Lenka Vilímková Jan Páca Veronika Kremláčková Jan Páca Marie Stiborová

The efficiencies of NADPH-dependent phenol hydroxylase (EC 1.14.13.7) and catechol 1,2-dioxygenase (EC.1.13.11.1) in biodegradation of phenol in the cytosolic fraction isolated from yeast Candida tropicalis were investigated. Enzymatic activities of both NADPH-dependent phenol hydroxylase and catechol 1,2-dioxygenase were detected in the cytosolic fraction of C. tropicalis grown on medium conta...

Journal: :Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] 2016
Maryam Karimi Mehdi Hassanshahian

Phenol and phenolic compounds are environmental pollutants present in industrial wastewaters such as coal tar, oil refineries and petrochemical plants. Phenol removal from industrial effluents is extremely important for the protection of environment. Usually, phenol degradation is carried out by physicochemical methods that are costly and produce hazardous metabolites. Recently, phenol biodegra...

Journal: :FEMS microbiology letters 1995
K T Semple R B Cain

This study investigated the catabolic potential of a eukaryotic alga to degrade one of the most common organic pollutants, phenol. The alga, Ochromonas danica (993/28), was selected for study after screening for its heterotrophic capabilities. The catabolic versatility of the alga was elucidated by incubating with a variety of phenolic compounds. The alga removed phenol, all the cresol isomers ...

2017
Shimin Kang Jinxia Fu Gang Zhang Wentao Zhang Huibin Yin Yongjun Xu

Humins are low-value-added byproducts from the biomass acid hydrolysis process. In the present work, humins were first employed as a phenol replacement for synthesis of modified phenol-formaldehyde adhesives through a two-step process. In this process, humins were first utilized to obtain alkaline soluble products, mainly consisting of phenolics, through a hydrothermal process. The obtained alk...

2011
A. Quintanilla J. A. Casas J. J. Rodriguez M. T. Kreutzer Freek Kapteijn J. A. Moulijn

Wet oxidation of phenol over an Fe/activated carbon catalyst has been studied in a trickle-bed reactor in the following operational window: inlet C phenol=0.5 and 1 g/L, T=100-127 ◦C, PT=3-8 atm, W=0-4.8 g, QL=0.125-2 mL/min and QO2=91.6 NmL/min. The experiments were carried out in the absence of mass transfer limitations. Oxidation and mineralization reactions of phenol are proven to take plac...

2006
YOSHITAKA TAGO HIROSHI KURAISHI

Several floc-forming bacteria and phenol-decomposing bacteria were isolated from a phenol-adapted activated sludge. Strain No. 12 was the best floc-former and the ratio of flocculated cells to total cells was 90 or more. A model floc was formed by the mixed culture of the strain No. 12 and No. 3, which was one of representative strains of phenoldecomposing bacteria. This model floc can successf...

2015
Mohammad-Javad Ghannadzadeh Ahmad Jonidi-Jafari Abbas Rezaee Reza Darvishi Cheshmeh Soltani

In the present study, the removal of phenol from synthetic wastewater was evaluated in a fixed bed reactor with up flow sludge blanket filtration (FUSBF) in comparison with a typical USBF system. At hydraulic retention time (HRT) of 24 hours and solid retention time (SRT) of 20 day, the effect of initial concentration of phenol (260-1020 mg/L) on phenol and chemical oxygen demand (COD) removal ...

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