Model experiments on the coagulation-membrane post-treatment of complex wastewater

Abstract

With the development of technology of purification of toxic oil-containing liquid waste it was shown that the complex compound of the wastewater, its reducing nature (low negative redox-potential) can cause low efficiency of electrolytic coagulation stage and induce coagulation after membrane filtration stage. The possibility of "membrane activation" of the coagulation process was tested with the polystyrene latex model system. In addition, there was shown a lower rate of the electrolytic coagulation with the model system based on phosphate buffer, sodium chloride, an organic dye, gasoline, sodium sulfide than with a similar system adjusted to positive values of redox-potential using hydrogen peroxide. In both cases the analysis of particle size distributions was performed using the analyzer Zetatrac (Microtrac Inc., USA, measured outside dimensions 0.8–6500 nm). Thus, the necessity of control and correction of the redox-potential of the wastewater entering to the coagulation-membrane post-treatment for the effective process of electrolytic coagulation preceding the membrane filtration stage was shown

Experimental Modeling and Electrochemical Analysis of Salted Oily Wastewaters

“…At the same time, constantly new studies are carried out to improve existing or develop new methods, materials, technologies.The laboratory scientific researches needed to develop new technologies for treatment of oily wastewatersare problematic for several reasons.They include the toxicity of such effluents, difficulty in providing of variations in their composition in a wide concentration range of the individual components. Therefore, a number of studies should be carried out on model systems [12].…”

Modification of Wastewater Treatment Technology at Cottonseed Oil Plant

“…Many of them are also widely applied in treatment of other types of waters. For example, coagulation and filtration are used in treatment of drinking water [9,10], municipal wastewater [11,14], drainage water [15], separation and flotation are used in treatment of industrial wastewaters polluted with petroproducts [10,16,17].…”