Wyniki wyszukiwania - BazTech

1

Studying the Effect of Mineral Fertilizers on the Development of the Eutrophication Process in the Water Bodies

Kostenko Viktor, Tavrel Maryna, Bohomaz Olha, Kostenko Tetiana, Kostyrka Olesia, Zemlianskyi Oleh

Ecological Engineering & Environmental Technology

|

2023

|

Vol. 24, iss. 4

79--87

EN

The article is devoted to the disclosure of the effect on the vital activity of cyanobacteria by changes in the nutrients in the chemical composition of artificial aquatic biotopes. The research results allowed us to establish that the dissolution of complex mineral fertilizer (nitrogen, phosphorus and potassium) in the range of up to 10 g/L contributes to the active development of cyanobacteria, which is accompanied by complete binding of mineral additives and absorption of oxygen. The addition of fertilizers in the amount of more than 1 g/L contributes to a sharp increase in the growth rate of the cyanobacteria population, which provokes the conditions for the blooming of the solutions. Enrichment of the nutritive base of biotopes ensures rapid growth of biocenosis and accelerated consumption of dissolved substances. The recorded average absorption rate of phosphorus reached more than 17 g/(L·day), and nitrogen – 30 g/(L·day). The formation of sediment and foam in the test vessels was associated with the depletion of nutrients and the death of hydrobionts. This phenomenon can serve as an indicator of oxygen decrease in the water. The results of the experiment confirmed the ability of cyanobacteria to transform nitrogen and phosphorus dissolved in water into bound organic forms with high intensity. This opens up the prospect of creating biological methods and means of wastewater demineralization.

2

Recirculating Airlift for Aeration of Shallow Water Bodies

Tavrel Maryna, Kostenko Viktor, Bohomaz Olha, Kostenko Tetiana, Zemlianskyi Oleh, Pidhornyy Mykola

Ecological Engineering & Environmental Technology

|

2022

|

Vol. 23, iss. 5

177-187

EN

The article is devoted to solving the issue of ensuring the efficient operation of aeration equipment in the conditions of shallow water bodies with an average depth of only a few meters. The article offers a technical solution for reducing the size of airlift aerators and increasing their performance by creating a recirculation movement of water inside the unit. With the help of a laboratory model, it was established that the dynamics of oxygenation of water in the pool with the help of a recirculating airlift is subject to a logarithmic dependence on the size of the flow regulator. It was possible to increase the oxygen concentration in the pool by 2.6 times within three hours as part of the simulation. The rate of water oxygenation was much higher than for a conventional airlift of the same size. The offered cost-efficient aeration unit, which uses wind flow as an energy source, can be used for fish farms and other applications.

3

Experimental Testing of Water Body Aeration Airlift Technology

Kostenko Viktor, Tavrel Maryna, Bohomaz Olha, Zavialova Olena, Kostenko Tetiana, Myhalenko Kostiantyn, Kostyrka Olesia

Ecological Engineering & Environmental Technology

|

2022

|

Vol. 23, iss. 3

184--192

EN

The article is devoted to substantiation of parameters of water body aeration technology at high, as well as low, air temperatures. As a result of studies, the design of the water aerator based on a two-stage airlift has been improved. A study of its physical model has been conducted. The cost indicators of the set-up and its components have been obtained. It has been established that at various design parameters, the proposed scheme of operation allows to oxygenate water more effectively when compared to conventional design. A new type of water aerator based on two-stage airlift has been proposed. The linear dependence of the dynamics of the aerator flow rate on the supply of compressed air by the compressor, as well as the logarithmic dependence regarding the water oxygenation have been established. The indicator of effective rate, which allows for evaluating efficiency of water body oxygenation has been substantiated. The study results open the possibility of using an aerator with improved design to prevent eutrophication of water in open water and industrial reservoirs, e.g. in construction.

4

Pilot Tests of a Hybrid Solar Installation

Kostenko Viktor, Shkrylova Svitlana, Zavialova Olena, Kostenko Tetiana, Kostyrka Olesia, Rotar Vasyl

Ecological Engineering & Environmental Technology

|

2021

|

Vol. 22, iss. 6

122--130

EN

The article is devoted to the study of the efficiency of the structural elements of the solar collector in cloudy conditions with the stabilization of heat transfer due to the use of terrestrial radiation. The study involves experimental verification of theoretically obtained assumptions about the use of terrestrial radiation to improve the efficiency of the solar installation. Proposed a hybrid version of a solar installation using solar and terrestrial radiation. Based on the results of laboratory and field experimental tests, the efficiency of the offered hybrid installation is confirmed, positive results from short-term compensations of decrease in solar irradiation, e.g., due to clouds, are received. In addition to the known characteristics of heat collectors, for a hybrid installation, such a design parameter as the ratio of the heat capacity of the accumulator and the collector seems to be essential. The increase in the indicator characterizes the increase in the time of effective operation in the presence of clouds. The tests showed a significant impact on the operation of the installation of external factors such as the position of the Sun, ambient temperature, wind speed, etc. This will be taken into account in the further justification of the design of the hybrid installation and its parameters.

5

Sposób oczyszczania wód kopalnianych i przywracania różnorodności biologicznej terenów zdegradowanych

Chepak Olga, Kostenko Viktor, Zavialova Elena

Inżynieria Ekologiczna

|

2019

|

Vol. 20, nr 3

20--25

PL

Celem pracy jest przedstawienie sposobu szybkiego odzyskiwania zdegradowanych terenów likwidowanych kopalń z jednoczesnym oczyszczaniem pompowanych wód kopalnianych. W pracy zaproponowano ulepszoną metodę przyspieszonego odzyskiwania obszaru zdegradowanego działalnością przemysłową z zastosowaniem podnośnika powietrzno-wodnego do oczyszczenia wód kopalnianych, co umożliwi regulację temperatury wody produkowanej z wymienników ciepła. Na podstawie obliczeń określono głębokości rozmieszczenia elementów instalacji podnośniku powietrzno-wodnego. W celu utrzymania temperatury wody w okresie zimowym, w zakresie 10-12°C, ścieki kopalniane o temperaturze 34°C powinny być pompowane z dolnego szybu podnośnika znajdującego się na głębokości 800 m. Z kolei do schłodzenia wody w okresie letnim do temperatury 25°C, ściek kopalniany o temperaturze około 13°C, powinien być pompowany z górnego szybu podnośnika zlokalizowanego na głębokości 120 metrów.

EN

The aim of the work is to show the method of accelerated restoration of the degraded territory of industrial sites of liquidated mines with simultaneous purification of pumped mine waters. The paper proposes an improvement of the method of accelerated recovery of the degraded territory of industrial sites of abandoned mines with simultaneous purification of pumped mine waters through the use of an airlift unit that will allow to regulate the temperature of the water produced from the heat exchangers. The depth of placement of the airlift installation was determined by calculation. In order to maintain the temperature of the water in the bioplate system in winter at the level of 10-12°C, mine water having a temperature of 34°C must be supplied from the lower trunk of the airlift located at a depth of 800 m. To cool the water in the bioplato system to 25°C in summer, the mine water with a temperaturę of about 13°C must be pumped out from the top of the shaft of the airlift to a depth of 120 m.