Open AccessProblems of previous local treatment wastewater of oil production and their effective solution
Author(s) -
Larysa Sablii,
Вероніка Жукова,
Lyudmyla Yepishova
Publication year - 2021
Publication title -
problemi vodopostačannâ, vodovìdvedennâ ta gìdravlìki
Language(s) - English
Resource type - Journals
ISSN - 2524-0021
DOI - 10.32347/2524-0021.2021.35.48-55
Subject(s) - wastewater , suspended solids , total suspended solids , sewage treatment , aeration , environmental science , waste management , organic matter , filtration (mathematics) , chemical oxygen demand , pulp and paper industry , chemistry , environmental engineering , engineering , statistics , mathematics , organic chemistry
The technology of local wastewater treatment of oil production is presented. It based on the consistent use of physico-chemical treatment methods and allows to remove organic matter, suspended solids from wastewater to the requirements of regulations and divert treated wastewater into the municipal sewerage system. Wastewater generated during the processing of soapstocks, in terms of pollutants exceeds the standards set for wastewater when discharged into urban drainage systems. Therefore, before removal to municipal treatment facilities, they must be treated locally using physico-chemical and biological methods. In the phase-dispersed state, such wastewater is a stable emulsion. The presence of phospholipids, which are stabilizers of emulsions, complicates the phase separation of wastewater components. In addition, wastewater contains suspended particles, colloidal and dissolved substances of organic and inorganic nature. It was found that the highest values of the effect of removal of organic matter by COD - 78% at the initial COD - 40000 mg / dm3, the effect of reducing the concentration of suspended solids - 72.5% at the initial 6300 mg / dm3 were obtained in the process of coagulation using Al2 (SO4)3 and subsequent flotation with air supply through porous materials. The technological scheme of local treatment of industrial wastewater is proposed. It includes the following main processes: averaging, aeration, alkalinization, coagulation, flotation, oxidation, filtration, adsorption. Experimental studies have shown the effectiveness of treatment of soapstocks in oil production using the proposed technology with bringing the quality of treated wastewater to current sanitary requirements, which allowed to recommend the technology of treatment of soapstocks for successful use in industrial enterprises of the oil industry.