Abstract
The complexity of biochemical wastewater treatment is most often due to the presence of a large number of organic impurities, causing the death of the biological community of activated sludge microorganisms. Application of the method of lowering the pH of industrial effluents to minimum value reduces the solubility of organic substances in water, separating them into a separate layer of emulsified wastewater. In this case, the process of removing organic impurities from treated wastewater becomes the most accessible, but also requires solving the problems of technological and environmental safety. Dissolution of wastewater organic impurities separated into a separate layer a solvent – the extractant followed by the extraction of organic components extracted from it, reduces the level of wastewater pollution with organic substances according to the oxidation index (COD) to an acceptable level. The technology of the applied method allows for the final treatment using biological methods; and practically constructively mounts and build a new modernized technological line.
Highlights
Issues of integrated wastewater treatment are especially relevant in recent years, due to the fact that environmental requirements for the degree of purification of water used by enterprises are constantly tightening, as well as the requirements to ensure the safety of the technological process [1, 2]
The degree of purification of wastewater from organic components was determined by changing the water oxidation index (COD)
The results of the study in determining the chemical composition revealed that 30% of the components contained in the organic part of wastewater are considered to be volatile
Summary
Issues of integrated wastewater treatment are especially relevant in recent years, due to the fact that environmental requirements for the degree of purification of water used by enterprises are constantly tightening, as well as the requirements to ensure the safety of the technological process [1, 2]. The technology of wastewater treatment itself requires compliance with certain conditions that are not always possible in practice Another important reason for the urgent issue of wastewater treatment is the high cost of reagents and apparatus design. Often overlooked is the issue of environmental friendliness of the wastewater treatment process, because it is necessary to regenerate the used reagents, recycle or bury waste [10, 11]. The combination of these reasons creates great difficulties in the organization of the complete water treatment process for most enterprises. The search for new effective, environmentally friendly and economical methods of industrial wastewater treatment is still urgent [12,13,14]
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