background: wastewater produced by a dairy in sanandaj is a major source of environmental pollution threatening the city. the dairy uses activated sludge treatment to remove organic pollution from the wastewater. the present study evaluated the performance of this process and its compliance with national requirements for chemical oxygen demand (cod), biochemical oxygen demand (bod), and total s...

human activities in the fields of agriculture, municipal and industry introduce significant amounts of nutrients and organic materials into the rivers and streams resulting in their contamination. computer models such as qual2kw are used extensively for water quality management of rivers and streams. the qual2kw model is a one dimensional, non-uniform, steady water quality model, which has been...

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...

Wastewater is a byproduct of industrial or household waste processes, and its contamination level must be determined before treatment. Discharges liquid effluents generated by mining operations, one the most prevalent forms water, pose risk to human health environment. This study evaluates physicochemical quality effluent discharges from Boukhadra mine (Algeria). Samples were collected washing ...

Improperly managed wastewater effluent poses environmental and public health risks. BOD evaluation is complicated by treatment. Using key parameters to estimate in can improve management monitoring. This study proposes a determination method based on the Artificial Neural Networks (ANN) model combine Chemical Oxygen Demand (COD), Suspended Solids (SS), Total Nitrogen (T-N), Ammonia (NH4-N), Pho...

Real Wastewater from Kitchen Restaurant (RWKR) contains high concentrations of Biochemical Oxygen Demand (BOD) pollutants to pollute the environment. One processing alternatives reduce BOD is adsorption method using activated carbon coconut shells. This study aims determine shell-activated as an adsorbent for organic matter in RWKR. The begins with making adsorbents that are activators on HCl 3...

aims: several methods have been used for textile wastewater treatment. the aim of this study was to evaluate the efficiency of rosa damascena watering waste ash for cod and color removal from textile wastewater.  materials & methods: rose watering waste was gathered from one of the kashan processing plants. the raw wastewater sample was taken from one of the textile industries in kashan country...