This paper described the apparatus for biological pre-treatment of petrochemical wastewater that is collected from styrene and propylene oxide production. The values of organic contaminants loading and the pH of the incoming wastewater to the bioreactor are determined. The dependence of the foam layer height on various parameters of pre-treatment installation is analyzed to manage investigated process. For this purpose we measured height of the foam layer which is generated in a glass column by aerating samples of untreated wastewater and wastewater in the bioreactor by air. It is shown that the foaming process increases with increasing pH of wastewater and content of wastewater contamination. I ncreasing quantity of biomass allows increasing pretreatment efficiency. On the other hand the amount of biomass above 0.12 units by optical density at 590 nm can lead to increase the foaming, which reduces the pretreatment efficiency.
нефтехимические сточные воды, биологическая предочистка, пенообразование, pH, реагенты, биореактор, стирол, окись пропилена, petrochemical wastewater, biological pre-treatment, foaming, pH, reagents, bioreactor, styrene, propylene oxide
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