LIQUID EXTRACTION CLEANING OF WASTEWATER OF EDIBLE OIL PRODUCTION

Abstract

Ensuring of ecological plants safety where food products are produced as well as elimination of wastes influence upon the environment is our subject problem. Moreover it creates a significant environmental problem, as is the pollution of surface waters by organic substances. So that is why finding ways of industrial wastewater treatment is an urgent task. Our previous goal was the emulsions destruction, which are the main wastewater polluter component. Now our task is to continue further illuminated water purification method using liquid extraction. The methodology of experimental research is as follows: 50 ml of wastewater and 50 ml extractant (40 ml ethyl acetate (butyl acetate) and 10 ml of the appropriate alcohol) is mixed in the mixer for 30 minutes, then in the sump separated into two layers, extract and raffinate. The concentration of the contaminant in wastewater is determined by photocolorimetry analysis. To achieve the maximum degree of wastewater treatment we have chosen extractant, which has selective solubility with respect to pollutants. The authors have learnt that the increase in molar mass of alcohol leads to increasing the concentration of pollutants in the extract. From the list of studied alcohols, the most appropriate for using is butyl alcohol (butanol). Target component distribution between the liquid phases is defined by balance conditions. The authors have constructed line workers that allowed determining the transfer degrees number to the system using two types of extractants such as ethyl atсetat-butanol and butyl acetate – butanol. From the huge amount of liquid-extraction devices designs that can be recommended for oil wastewater treatment plants the most rational is mixing – extractors slop. As a research result suitable extractants are selected – a mixture of ethyl acetate and butyl acetate with butanol, the maximum alcohol content that provides heterogeneous region in the extraction system is defined as well. An operating line and equilibrium line and also transfer steps number are identified. The multistage extraction installation is the most appropriate and gives strong results for sewage treatment from oil production plants.