in this present study the dissolved air flotation (daf) system was investigated for the treatment of kermanshah oil refinery wastewater. the effect of three parameters on flotation efficiency including of flow rate (outflow from the flotation tank), saturation pressure and coagulant dosage on chemical oxygen demand (cod) removal was examined experimentally. all the experiments were done under a...

AIMS To assess the impact of winery wastewater (WW) on biological sand filter (BSF) bacterial community structures, and to evaluate whether BSFs can constitute alternative and valuable treatment- processes to remediate WW. METHODS AND RESULTS During 112 days, WW was used to contaminate a BSF mesocosm (length 173 cm/width 106 cm/depth 30 cm). The effect of WW on bacterial communities of four B...

Background: Qual2k is a stream water quality model and was used to evaluate the water quality of the Kine-Vars River and assess the response of the river to nutrient management strategies. Methods: For that purpose, 7 sample stations were selected and surface water samples were collected in the winter and summer of 2012 and were analyzed for temperature, dissolved oxygen, biological oxygen dem...

Wetlands are land areas that are wet during part or all of the year. Constructed wetlands are man-made systems that mimic the functions of natural wetlands applied for wastewater treatment. The aim of this research is to investigate the feasibility of using a constructed wetland for treatment of kitchen waste water from hostel mess. The wetland plant species grown in the constructed wetland is ...

Water is used for various human activities such as drinking, bathing, washing and recreation. The physicochemical as well as microbiological qualities of water samples collected over a period of ten months from five swimming pools in five randomly-selected hotels in Osogbo metropolis, Southwestern Nigeria were assessed. The collection of the fifty water samples spanned the dry and rainy seasons...

Monthly changes in water quality parameters (physicochemical) of a rain fed lake (Bilikere) in Mysore city, were investigated for two calendar years (2002 and 2003) to assess the suitability of this lake for pisciculture. Although there were monthly fluctuations in water temperature, total suspended solids (TSS), dissolved oxygen (DO), nitrite and ammonia, they were within the desirable limits....

In this study, a water quality model of Haraz basin was used as an evaluative tool to estimate the spatial distribution of variables that are related to water quality and nutrient loads of the Haraz River. Previous studies performed in this river indicate that trout culture activity along the Haraz River have led to various changes in the water quality parameters. In the present work, the possi...

The characterizations of vegetable oil wastewater (VOW) are unpleasant odor, dark color, and high organic contents, including large amounts of oil and grease (O&G), chemical oxygen demand (COD), fatty acids and lipids. Therefore, VOWs should be treated efficiently to avoid the environment pollution. The aim of present study was the investigation of VOW biological treatment using membrane biorea...

With the rapid development of the fisheries, aquaculture species have degraded, especially for high-density aquaculture of random discharge of industrial wastewater and domestic sewage so that capacity of self-purification and regulation of ponds reduced, and water environment exacerbated. For instance, baits and feces entered into the water in the farming mode of main feeding, so that the amou...