Removal of dissolved organic carbon (DOC) from water resulting from adsorption and microbial uptake was examined to determine the importance of biotic and abiotic pathways. Physical-chemical adsorption to components of the stream sediment or water and biotic assimilation associated with the microbial population was determined in recirculating chambers utilizing leachate from alder (Alnus rubru)...

Over the years, various technologies have been utilized for Natural Organic Matter (NOM) removal with varying degrees of success. Conventional treatment methods comprising of coagulation, flocculation, sedimentation, or filtration are widely used to remove NOM. An alternative to these conventional methods is to use spiral wound membranes. These membranes tend to remove too much hardness whilst ...

background: crude oil is a very complex composition with harmful effects in human health such as carcinogenesis and blood effects. using the bioassay method to assess the effect of purification process produces useful results. in this study the effect of ozonation to reduce the toxicity of crude oil in the water is investigated. methods: standard sample of the water soluble fraction were prepar...

Alcohol ethoxylates (AEs) are a class of non-ionic surfactants widely used as detergents, emulsion stabilizers, foaming agents and wetting enhancers. These properties allow large industrial application as additives in the formulation of pesticides, pharmaceuticals, paints and cosmetics, as well as in mineral separation, biotechnology etc. Although there is no known toxic effect of AEs, their co...

In the present study the treatment efficiency of O3 and UV+O3 processes were compared for the oxidation of simulated dyebath effluent containing a mixture of a reactive dye (C.I. Reactive Blue 19) and various dye auxiliary chemicals. The color, COD and TOC removal rates were assessed for different processes. The effect of initial dye concentration and presence of sodium hydroxide and sodium car...

A pilot scale wastewater treatment plant was designed, constructed and operated on site to treat wastewater from a combined effluent drain. The activated sludge process (ASP) was used at three different hydraulic retention times (HRT) of 12, 10 and 8 hrs at an average MLSS concentration of 3500 mg/L. Under each HRT, the pilot plant was operated for a period of 10-12 weeks. Chemical oxygen deman...

There is growing concern from the scientific community that pharmaceutical compounds are not treated sufficiently by current wastewater treatment methods and therefore trace amounts of such compounds are being identified in surface water, ground water and sewage effluents. Advanced oxidation processes (AOPs) are now being proposed for the specific treatment of industrial wastewaters and wastewa...

For stricter drinking water regulations in the future, reducing the humic acid and disinfection byproducts in raw water, namely, trihalomethanes (THMs) and haloacetic acids (HAAs) is worthy for research. To investigate the removal of waterborne organic material using a lab-scale of bio-activated carbon filter under different EBCT, the concentrations of humic acid prepared were 0.01, 0.03, 0.06,...