Wastewaters discharged by several industrial activities, such as synthetic fibers, mineral processing, fertilizers, metal finishing, and ammunitions and explosives industries, have an high-salinity content and are characterized by a very high concentration of nitrates (more than 3 g/L). The treatment of these wastewaters generally deals in an anoxic biological process performed in activated slu...

Between November 1994 and October 1996 a total of 12 samples were collected in order to characterise wastes discharged from the Frutarom complex. The study focused on two principal discharge pipes, one in front of the VCM tanks and a second shorter pipe discharging in front of the main plant. Discharges from this second pipeline had been discontinued by 1996. In 1994 a third discharge, arising ...

Surfactants are among the most widely disseminated xenobiotics that contribute significantly to the pollution profile of sewage and wastewaters of all kinds. Among the currently employed chemical unit processes in the treatment of wastewaters, coagulation-flocculation has received considerable attention for yielding high pollutant removal efficiency. Jar-test experiments are employed in order t...

Chemical coagulation is commonly used in raw water and wastewater treatment plants for the destabilisation of pollutants so that they can be removed in the subsequent separation processes. The most commonly used coagulation chemicals are aluminium and iron metal salts. Electrocoagulation technology has also been proposed for the treatment of raw waters and wastewaters. With this technology, met...

The process of pollutant adsorption from industrial wastewaters is a multivariate problem. This process is affected by many factors including the contact time (T), pH, adsorbent weight (m), and solution concentration (ppm). The main target of this work is to model and evaluate the process of pollutant adsorption from industrial wastewaters using the non-linear multivariate regression and intell...

BIOLOGICAL SULFATE REDUCTION IN SULFATE-RICH INDUSTRIAL WASTEWATERS BY ANAEROBIC FLUIDIZED-BED REACTORS: EFFECTS OF ELECTRON DONORS High sulfate wastewaters are a major problem in industry because they increase the total dissolved solid content, and interfere with methanogenesis resulting in decrease in production of methane, which is a valuable fuel. A large variety of industries including: pu...

Molecular and metabolomic tools were used to design understand the biodegradation of phenolic compounds in real industrial streams. Bacterial species isolated from an wastewater treatment plant a phenol production factory identified using molecular techniques. Next, potential most promising strains was analyzed presence by-product containing phenol, alfa-methylstyrene, acetophenone, 2-cumylphen...

A newly phenol-degrading bacterium, identified as Ralstonia sp. strain PH-S1, was isolated from oil-contaminated soil in Khark Island. It was isolated by a multistep enrichment and screening technique on mineral medium (MM) containing 100 mg.l-1 of phenol as the sole source of carbon. The bacterium was able to degrade up to 1100 mg.l-1 of phenol but the cell growth decreased with higher concent...

as dyes are the most important pollutants of many industrial wastewaters. a large amount of reactive black 5 enters the environment in iran because of the use of this dye in iran's textile industries, so the goal of this study was to survey the catalytic ozonation process with bone char in removal of reactive black 5 dye from synthetic wastewater. in this experimental study bone char (bc) was p...