wastewater

Oil-fat industry produces and recycles vegetable fats and related products. Sewage of this industry contain a large number of pollutants different nature. But, the main contaminating components of this sewage are organic compounds, mainly fatty character. Existing methods of water purification are not capable of providing sufficient degree of wastewater treatment, which would comply established sanitary norms. It’s creates a big problem, because it’s cause pollution of surface waters with organic compounds. Solving this problem is possible when switching to closed water systems.

According to experts, today in Ukraine a quarter of sewage treatment plants and networks worked in value term depreciation. As a result, a large number of cleaning stations decommissioned and wastewater that must be disposed of at these sites, get into the environment completely untreated, causing serious concern because they pose a potential threat to health and life.

The adsorption of Copper (II) and Chromium (III) from aqueous solution by natural zeolite was investigated in fixed bed column. The effects of selected operating parameters such as flow rate and bed depth were evaluated. The breakthrough data are fitted well to Bed Depth Service Time (BDST) and Thomas models with high correlation coefficient, R2 = 0,91. The results showed that zeolite can be an effective adsorbent for Copper (II) and Chromium (III) removal.

The adsorption method of after-treatment of wastewater from the production of vegetable oils was investigated. The reasons of choice the activated carbon as adsorbent was justified. The statics and the kinetics of the adsorption process by activated carbon the organic component from the wastewater of oil production after extraction cleaning was investigated. The experimental data based on the theory of Freundlich and Langmuir were processed and the main constants of the process were defined.

One of the promising ways to solve the problems of environmental safety is the creation of highly efficient methods of wastewater decontamination and destruction of organic compounds in them. The electromagnetic vibration cavitator was created to treat brewing wastewater. The efficiency of vibrocavitation treatment technology for the food industry was studied. The highest degree of decontamination from biological and organic contaminants was found to be provided by the combined action of vibrocavitation and related processing of gases, nitrogen in particular.

The aim of this work was to study the process of adsorption of Copper and Chromium cations by natural zeolites in static conditions. The change of the chemical composition of the surface of the zeolite as a result of sorption of heavy metals was investigated. The influence of the type of the ions and pH selectivity in absorption of heavy metals removal by zeolite was analysed. The reasons for the selective extraction of Copper from two-component solution were explained.

Studies prospects of using waste to produce natural sorbents gypsum binder, their influence on the rheological and physico-mechanical properties.

The  results  of  experimental  studies  of  phosphorus  removal  by  chemical  and  biological methods are provided. The optimum conditions of these processes are made. Наведено  результати  експериментальних  досліджень  вилучення  сполук  фосфору хімічними  та  біологічними  методами.  Встановлено  оптимальні  умови  ведення  цих процесів.

In the given article the theoretical bases of adsorption of typical contaminations of wastewaters are grounded. The review of literary data in relation to application of the klynoptylolite of Sokirnitsa deposit in engineering of environment is carried out. Experimental data of adsorption capacity of natural klynoptylolite are resulted. A mechanism and features of processes of adsorption in static terms is described. Conformities to the law of change of adsorption capacity in accordance to the parameters of molecules of adsorbate were observed.

The present article substantiates the theoretical bases lactic acid adsorption on mineral and carbon adsorbents. Monitoring of wastewater contaminated with wastes of dairy plants, estimation of quantities, peculiarities of wastes localization and estimation of toxicological impacts on the environment was carried out. The existing theoretical apparatus for adsorption processes description was analyzed. Adsorption process mechanism and methods for identification of experimental data in theoretical models was developed.