This study attempts to investigate the effect of phenol on physicochemical properties and treatment performances of partial nitrifying granules (PNGs). Two sequencing batch reactors (SBRs) fed with synthetic ammonium wastewaters were operated in absence (R1) or presence (R2) of phenol. The PNGs in R1 maintained excellent partial nitrification performance and relatively stable physicochemical pr...

abstract   background: phenol and its compounds are common environmental contaminants, which because of their potential harm to human health, are considered as priority pollutants. in this study, the potential of ostrich feather for phenol removing from aqueous solution was studied. methods: removing the phenol from the aqueous solution was studied via considering the effect of absorbent (0.1, ...

A new phenol-degrading bacterium with high biodegradation activity and high tolerance of phenol, strain PD12, was isolated from the activated sludge of Tianjin Jizhuangzi Wastewater Treatment Facility in China. This strain was capable of removing 500 mg phenol/L in liquid minimal medium by 99.6% within 9 h and metabolizing phenol at concentrations up to 1100 mg/L. DNA sequencing and homologous ...

Anaerobic activation of benzene is expected to represent a novel biochemistry of environmental significance. Therefore, benzene metabolism was investigated in Geobacter metallireducens, the only genetically tractable organism known to anaerobically degrade benzene. Trace amounts (<0.5 μM) of phenol accumulated in cultures of Geobacter metallireducens anaerobically oxidizing benzene to carbon di...

Phenol biodegradation under aerobic conditions and its effect on the nitrification process were studied, first in batch assays and then in an activated sludge reactor. In batch assays, phenol was completely biodegraded at concentrations ranging from 100 to 2500 mg l(-1). Phenol was inhibitory to the nitrification process, showing more inhibition at higher initial phenol concentrations. At initi...

biodegradation of phenol is a major focus of toxic organic compound degradation by microorganisms isolated from polluted areas. an increasing number of bacteria and fungi possessing unique biodegradation capabilities have been isolated in recent years. in this study a new isolate, rhodococcus erythropolis sko-1, from polluted soils in the tehran oil refinery region, is reported. identificati...

phenol and phenol compounds are environmental pollutants present in industrial wastewaters such as, coal tar, oil refineries and petrochemical plants exist. phenol removal from industrial effluent is extremely important in protection of environment. recently phenol biodegradation has been considered. marine bacteria are the most important phenol biodegrader. in this study, the phenol-degrading ...

horseradish peroxidase was encapsulated in calcium alginate for the purpose of phenol removal. considering enzyme encapsulation efficiency, retention activity and enzyme leakage of the capsules, the best gelation condition was found to be 1 % w/v of sodium alginate solution and 5.5 % w/v of calcium chloride hexahydrate. upon immobilization, ph profile of enzyme activity changes as it shows high...