STUDY OF EFFICIENCY OF PRE-REAGENT TREATMENT OF WASTE WATER FROM BREWERY

The purpose of this research was to determine the effectiveness of the reagent treatment of wastewater from breweries. The object of the study was the wastewater of the Samara brewery. To achieve this goal, a trial coagulation of the original wastewater of the brewery was carried out using six diff erent reagents. During the experiment, the optimal doses of each coagulant were determined. It was found experimentally that the maximum effi ciency of coagulation was 34 % in terms of COD. Comparative results of the reagent treatment with various coagulants showed that an increase in the reagent dose over 150 mg / l in terms of Me2O3 did not lead to an increase in the purifi cation effi ciency, however, the cost of purifi ed water signifi cantly increased. The research results were used in the development of a cleaning scheme for the brewery in Samara.

Investigation of factors of the appearance of odor in river water at the water intake of Rostov-On-Don

The paper presents a study of quality of natural waters and water in a centralized water supply system during the period of an increase in the “Smell” indicator in the spring of 2021. The chemical and physical properties of water, the results of quality and quantity of studying the variety I phytoplankton in the most difficult period of deterioration in quality of river water. Low water and exceeding MPC concentrations of organic substances in river water. The Don River causes altered form odorant substance as evidenced by the results of determination in water 1,2,3- t rihlorbenzol and geosmin, hexachloroethane and aniline shown in operation. Barrier function of reagent treatment methods used at water treatment plants in the lower reaches of the river. The Don River, even when combined with carbonated water, is deficient in odor-producing substances.

Improving the ecological safety of potato chips production by devising a method for wastewater treatment and recycling

The study deals with determining the effectiveness of mechanical and physical and chemical methods for the treatment of wastewater of potato chips enterprises. It was established that the wastewater that is formed at different stages of production differ in composition. Wastewater after washing and peeling potatoes is contaminated mainly with suspended soil substances of about 500 mg/l, which are not settled, and also has soluble organic substances with a value of COD of about 1,000 mg/l. It was found that the use of coagulation-flocculation treatment makes it possible to get clear water suitable for reuse for washing potatoes. Coagulant – aluminum sulfate in the amount of 250 mg/l turned out to be effective to destroy the stability of the dispersed system. To intensify the sedimentation of coagulated flakes of suspended particles, non-ionogenic flocculant, which is recommended to be dosed after the introduction of coagulant in the amount of 2.5 ml/l, was selected. Analysis of clarified water indicates a decrease in the concentration of suspended particles up to 26 mg/l and a decrease in COD and BOD5 to values of 262 mg/l and 176 mg/l, respectively. The completed studies made it possible to propose a circuit of treatment of wastewater after washing potatoes, which consists of pre-filtering, reagent treatment, water clarification, and sediment dehydration. This circuit makes it possible to intensively clean the water to the standards of its discharge into the sewage network. However, additional disinfection of water with oxidizers, for example, ozone, was proposed for the reuse of clarified water to wash vegetables at an enterprise itself. The use of the proposed circuit of intensive water treatment will allow increasing the environmental safety of the production of potato chips by preventing environmental contamination through reducing the volume of tap water consumption

Genetic and Functional Characterization of Novel Brown-Like Adipocytes Around the Lamprey Brain

During the process of vertebrate evolution, many thermogenic organs and mechanisms have appeared. Mammalian brown adipose tissue (BAT) generates heat through the uncoupling oxidative phosphorylation of mitochondria, acts as a natural defense against hypothermia and inhibits the development of obesity. Although the existence, cellular origin and molecular identity of BAT in humans have been well studied, the genetic and functional characteristics of BAT from lampreys remain unknown. Here, we identified and characterized a novel, naturally existing brown-like adipocytes at the lamprey brain periphery. Similar to human BAT, the lamprey brain periphery contains brown-like adipocytes that maintain the same morphology as human brown adipocytes, containing multilocular lipid droplets and high mitochondrion numbers. Furthermore, we found that brown-like adipocytes in the periphery of lamprey brains responded to thermogenic reagent treatment and cold exposure and that lamprey UCP2 promoted precursor adipocyte differentiation. Molecular mapping by RNA-sequencing showed that inflammation in brown-like adipocytes treated with LPS and 25HC was enhanced compared to controls. The results of this study provide new evidence for human BAT research and demonstrate the multilocular adipose cell functions of lampreys, including: (1) providing material energy and protecting structure, (2) generating additional heat and contributing to adaptation to low-temperature environments, and (3) resisting external pathogens.

Ultrasonic Cavitation in Wastewater Treatment from Azo Dye Methyl Orange

The work is devoted to the study of reagent treatment of methyl orange mono azo dye under the action of acoustic vibrations of the ultrasonic range. The positive effect of cavitation phenomena on the rate of mineralization of azo dye (13.4% increase) was compared with the reagent treatment of the solution without ultrasonic vibrations. On the basis of the analyzed information sources and experimental results, a schematic technological scheme of cavitation-reagent mineralization of methyl orange was developed, the main apparatus of which is a hydrodynamic jet cavitator (scaling for industry).

Removal of Tetracycline Antibiotic from Wastewater by Fenton Oxidation Process

This study aimed to remove the antibiotic tetracycline from a sample of synthetic wastewater using an advanced oxidation process by Fenton's reagent treatment. Central Composite Design (CCD) software was used to reduce the number of tests required to remove tetracycline. The independent variables identified in batch oxidation experiments are the concentrations of tetracycline (40–250 mg / L), hydrogen peroxide (20–600 mg / L), and Fe(II) (0–60 mg / L). The rate of tetracycline degradation was significantly influenced by the concentration of hydrogen peroxide and tetracycline. The reaction time required for tetracycline removal was determined to be 15 minutes. The optimal ratio of independent variants leading to complete degradation 100% of tetracycline was hydrogen peroxide / Fe2 + / tetracycline 310/30/145 mg / l.

Реагентная очистка различных видов сточных вод трехкомпонентной композицией

Представлены результаты экспериментальных исследований реагентной очистки сточных вод трехкомпонентной композицией (коагулянт, флокулянт, щелочной реагент), которые проводились в ООО «ДальВОДГЕО». Экспериментально подобрано соотношение реагентов в композиции, причем флокулянт растворяется в кальцинированной соде и вводится после коагулянта. Испытания на стоках от пищевых производств (с высоким содержанием органических и минеральных взвешенных веществ) при недостаточном щелочном резерве подтверждают большую эффективность очистки и меньший объем осадка в случае применения композиции по сравнению с раздельным вводом реагентов. Ключевые слова: сточные воды, интенсификация реагентной очистки, коагулят, флокулянт, подщелачивающий реагент, коагулирующая-флоккулирующая щелочная композиция The results of experimental studies of reagent wastewater treatment with a three-component composition (coagulant, flocculant, alkaline reagent), which were carried out at DalVODGEO LLC (from 2015 to 2018, when one of the authors, S.B. Kundenok, worked as a chief project engineer in this organizations), then jointly with the Far Eastern Federal University (2017–2020). The ratio of reagents in the composition was experimentally selected, and the flocculant is dissolved in soda ash and introduced after the coagulant. Tests on effluents from food production (with a high content of organic and mineral suspended substances), with an insufficient alkaline reserve, confirm the greater efficiency of purification and a smaller volume of sediment in the case of using the composition in comparison, with the separate injection of reagents. Keywords: waste water, intensification of reagent treatment, coagulum, flocculant, alkalizing reagent, coagulating-flocculating alkaline composition Contribution of the authors: the authors contributed equally to this article. The authors declare no conflicts of interests.

Reagent treatment of bild water in ship separators

В работе представлены результаты экспериментальных исследований флотационной очистки судовых льяльных вод. Установлена целесообразность предварительной реагентной обработки судовых льяльных вод, направляемых на флотационную очистку. В качестве реагентов апробированы высокомолекулярные флокулянты: Праестол 852, Праестол 853 и К 1020. Определен наиболее эффективный флокулянт – Праестол 852. Обоснована целесообразность применения во флотационных машинах судовых сепараторов диспергаторов воздуха, выполненных из синтетического каучука. Использование синтетического каучука позволяет повысить эффективность извлечения нефтяных загрязнений, а также обеспечить бесперебойность и долговечность работы установки. Методом анализа размерностей получено критериальное уравнение процесса флотации нефтяных загрязнений из раствора льяльных вод. Исследовано влияние следующих технологических параметров процесса: интенсивности подачи воздуха, высоты слоя обрабатываемой жидкости, физико-химических характеристик жидкости, расхода воздуха и льяльной воды. Разработана математическая модель процесса флотации. Определены оптимальные параметры процесса. The paper presents the results of experimental studies of flotation treatment of ship bilge waters. The expediency of preliminary reagent treatment of ship bilge water sent for flotation treatment has been established. High molecular weight flocculants were tested as reagents: Praestol 852, Praestol 853. K 1020. The most effective flocculant, Praestol 852, has been determined. The expediency of using in flotation machines of ship separators of air dispersers made of synthetic rubber has been substantiated. The use of synthetic rubber makes it possible to increase the efficiency of the extraction of oil contaminants, as well as to ensure the uninterrupted and durable operation of the installation. The criterion equation of the process of flotation of oil pollution from a bilge water solution was obtained by the method of dimensional analysis. The influence of the following technological parameters of the process was investigated: the intensity of the air supply, the height of the treated liquid layer, the physicochemical characteristics of the liquid, the air and bilge water consumption. A mathematical model of the flotation process has been developed. The optimal parameters of the process have been determined.