scholarly journals RESULTS OF EXPERIMENTAL STUDIES OF THE PROCESS OF SOIL REMOVAL AND LOADING IN GREENHOUSES

2020 ◽  
pp. 135-141
Author(s):  
А.О. Везиров ◽  
П.И. Павлов ◽  
А.В. Левченко ◽  
В.В. Корсак
Keyword(s):  
Energy Intensity ◽  
Soil Removal ◽  
Soil Layer ◽  
Experimental Studies ◽  
Machine Design ◽  
Operating Parameters ◽  
Technological Operation ◽  
Natural Components ◽  
Periodic Replacement ◽  
Farming Soil

Выращивание овощей в теплицах позволяет собирать частые урожаи и круглогодично обеспечивать население свежей продукцией. В последнее время, особенно с развитием органического земледелия, наряду с гидропонной широко используется грунтовая технология, при которой растения выращиваются на специально приготовленных почвенных смесях, состоящих из естественных природных компонентов. Использование этой технологии предполагает периодическую замену верхнего (санитарного) слоя почвы в теплицах. Специализированных машин для выполнения операции по удалению санитарного слоя практически не существует, а для выполнения этой технологической операции в хозяйствах используют неприспособленные машины и оборудование. Для выполнения данной операции предложена новая конструкция прицепной машины для удаления и погрузки почвы. Приведены результаты экспериментальных исследований влияния режимных параметров на энергоемкость процесса удаления и погрузки почвы, а также установлен характер зависимости мощности, необходимой на привод машины, от режимных параметров. Полученные результаты позволили установить фактические значения режимных параметров, при которых значения энергоемкости и мощности примут рациональные величины, что позволяет установить эффективность предложеннойконструкции машины, тем самым, полностью механизировать процесс удаления ипогрузки почвы в теплицах. Growing vegetables in greenhouses allows having frequent harvests and provides the population with fresh produce year-round. Nowadays, especially with the development of organic farming, along with hydroponic farming, soil technology is widely used, plants being grown on specially prepared soil mixtures consisting of natural components. The use of this technology involves the periodic replacement of the upper (sanitary) soil layer in greenhouses. There are practically no specialized machines for performing the operation to remove the sanitary layer, and unadapted machines and equipment are used to perform this technological operation on farms. To perform this operation, a new design of a trailed machine for removing and loading soil has been proposed. The results of experimental studies of the influence of operating parameters on the energy intensity of the process of removing and loading soil are presented, and the nature of the dependence of the power required to drive the machine on operating parameters has been established. The results obtained made it possible to establish the actual values of the operating parameters at which the values of energy intensity and power take rational values, which makes it possible to establish the effectiveness of the proposed machine design, thereby completely mechanizing the process of removing and loading soil in greenhouses.

INFLUENCE OF DESIGN AND OPERATING PARAMETERS ON THE POWER CHARACTERISTICS OF THE GREENHOUSE SOIL REMOVAL AND LOADING MACHINE

2021 ◽  
pp. 53-58
Author(s):  
Aleksandr Olegovich Vezirov ◽  
Pavel Ivanovich Pavlov ◽  
Anastasia Vladimirovna Levchenko ◽  
Victor Vladislavovich Korsak
Keyword(s):  
Soil Removal ◽  
Operating Parameters ◽  
Greenhouse Soil ◽  
Power Characteristics ◽  
Loading Machine

Temporal changes of mobile forms of 90Sr on Pripyat River floodplain in vicinity of Chornobyl NPP: measurements and risk assessments for river water contamination

2021 ◽  
Author(s):  
Gennady Laptev ◽  
Oleg Voitsekhovych ◽  
Valentyn Protsak ◽  
Mark Zheleznyak ◽  
Kenji Nanba ◽  
...  
Keyword(s):  
Coming Out ◽  
Water Contamination ◽  
Soil Layer ◽  
Experimental Studies ◽  
Water System ◽  
Water Soluble ◽  
Computational Grids ◽  
Exclusion Zone ◽  
Drastic Increase ◽  
Fuel Particles

<p>Since the 1986 Chornobyl accident transport of radionuclides by Pripyat River shares more than 90% of the annual total flux of radioactivity coming out the Chornobyl Exclusion Zone (ChEZ).  90Sr was the main contributor to this flux. In course of time destruction of the accidentally dispersed "fuel particles" leads to increase of mobile, e.g. water-soluble, forms of 90Sr  on territories affected by, while fixation of 137Cs in soil is reflected by significant reduction in 137Cs aquatic transport outside the ChEZ.</p><p>Heavily contaminated floodplain of the Pripyat River, located in vicinity of ChNPP upstream of Yaniv Bridge up to Ukrainian - Belorussian border, was considered as a “hotspot” with highest risks to the Pripyat and Dnipro water contamination due to recurrent flooding of these territories. This was evidently elucidated after the 1991 ice jam event when drastic increase of 90Sr in water was observed. The dikes splitting leftbank floodplain from the Pripyat river channel were constructed in 1992-1993. Yet, it is still important to quantify the amount of 90Sr that can be washed off the floodplain due to potential dike breakage caused by the extreme floods. </p><p>Key parameters used to describe status of radionuclide in reaching equilibrium in soil-water system are the distribution coefficient (Kd) and kinetic rate that is reciprocal of typical time scale of desorption processes. These parameters subsequently were estimated in 1991 on the basis of batch experiment carried out with the soil monoliths sampled from the Pripyat floodplain ( Laptev and Voistekhovich, 1991). Results were used in the 2D model COASTOX for justification the construction of protecting dikes (Zheleznyak at al., 1992).</p><p>To analyze current ability of 90Sr to be washed off the floodplain, soils monoliths were collected in 2020. The experimental studies of the soil cores collected from same location as the monoliths allowed to estimate mobile speciation of 90S and calibrate mass-exchange parameters. Amount of the readily exchangeable forms of 90Sr in soils significantly increased from 10-30% in the first years after the accident up to 65-75% as to 2020. Results of field and laboratory  studies were used for simulation the scenarios of 90Sr washing off the floodplain during the dikes breaks on the basis of contemporary version of COASTOX model, that includes the parallel algorithms for numerical solution of the model equations on the unstructured computational grids for multi CPU and GPU systems. Approaches for the modelling of the secondary release of 90Sr due the rapid destruction of “fuel particles” are considered. Taking into account two concurrent processes - decrease of amount of 90Sr in uppermost soil layer due to decay and downward vertical migration (1), amid increased amount of exchangeable forms of 90Sr (2), one could project subsequent increasing of 90Sr  in Pripyat and Dnipro river waters downstream the source in case of the dike breakage scenarios. On the other hand, computer simulation suggests that the maximal values of the 90Sr concentrations expected to be not higher than the measured ones during the high floods events after the accident.</p><p> </p>

Production of Ceramic Brick Based on Aluminum-Silicate Wastes

2016 ◽  
Vol 683 ◽  
pp. 156-161 ◽  
Author(s):  
Viktor A. Vlasov ◽  
Nelli K. Skripnikova ◽  
Ivan Yu. Yuriev ◽  
Pavel V. Kosmachev ◽  
Viktoria A. Litvinova ◽  
...  
Keyword(s):  
Power Plants ◽  
Thermal Power ◽  
Experimental Studies ◽  
Raw Material ◽  
Optimum Operating ◽  
Aluminum Silicate ◽  
Operating Parameters ◽  
Chemical Compositions ◽  
Thermal Power Plants ◽  
Ceramic Brick

The paper focuses on the production of ceramic brick based on aluminum silicate waste generated by thermal power plants. The grain size and chemical compositions of the raw material are investigated. Experimental studies are carried out to identify optimum operating parameters of the ceramic brick production. It is shown that the use of aluminum silicate waste, namely, 40–60 % ash together with clay raw material allows obtaining ceramic brick possessing 20–25 MPa compressive strength, 10–15 % water absorption, and frost resistance of over 60 cycles.

Research of extrusion’s process of feed-stuff for fish

10.12737/6503 ◽  
2014 ◽  
Vol 9 (3) ◽  
pp. 95-97 ◽  
Author(s):  
Рудой ◽  
Dmitriy Rudoy
Keyword(s):  
Energy Consumption ◽  
Specific Energy ◽  
Energy Intensity ◽  
Specific Energy Consumption ◽  
Experimental Studies ◽  
Screw Extruder ◽  
Temperature And Humidity

This article discusses a study of extrusion’s process of feed-stuff for fish on the developed two-screw extruder. The main technological requirements of fodder-stuff for fish was determined. The results of experimental studies were described, the relation of the specific energy consumption of the temperature and humidity of feed-stuff was defined. The obtained results show that the specific energy intensity of the two-screw extruder is lower than with other devices for the production of fodder-stuff for fish.

Experimental Studies on the Influence of Diesel Engine Operating Parameters on Properties of Emitted Soot Particles

2012 ◽  
Vol 184 (1) ◽  
pp. 1-15 ◽  
Author(s):  
Ulrich Leidenberger ◽  
Wolfgang Mühlbauer ◽  
Sebastian Lorenz ◽  
Sebastian Lehmann ◽  
Dieter Brüggemann
Keyword(s):  
Diesel Engine ◽  
Experimental Studies ◽  
Operating Parameters ◽  
Soot Particles

scholarly journals Formula and Technology Development for Obtaining Biologically Active Natural Food Additives

2019 ◽  
Vol 48 (3) ◽  
pp. 105-114 ◽  
Author(s):  
Станислав Смирнов ◽  
Stanislav Smirnov ◽  
Олия Фазуллина ◽  
Oliya Fazullina
Keyword(s):  
Dietary Supplements ◽  
Raw Materials ◽  
Import Substitution ◽  
Food Additives ◽  
Experimental Studies ◽  
Scientific Data ◽  
Biologically Active ◽  
Natural Food ◽  
Plant Materials ◽  
Natural Components

The research featured the development of formulae and technologies for the production of biologically active additives (BAA) for functional foods with potential adaptogenic, antioxidant, and hepatoprotective properties. Shilajit, a natural mineral-organic substrate, and various plant materials were used as sources of natural biologically active substances (BAS). The relevance of the study comes from the need for more efficient use of natural biologically active compounds, as well as from the need to expand the range of domestic dietary supplements with natural ingredients, which resulted from the current import substitution. Scientific data and experimental studies made it possible to choose advantageous raw materials with BAS and to assess their safety and potential properties. An experiment determined the content of BAS in the raw materials and in the control samples. A compatibility test wasconducted by mixing. As a result, five formulae with various combinations of natural components in the composition were scientifically substantiated. The authors defined the physicochemical and technological properties of the mixtures of dry extracts that determined the choice of technology and the quality of the finished product. The present paper also describes technology of obtaining encapsulated dietary supplements based on dry extracts of medicinal plants and shilajit. The advantage of the technology lies in the use of natural components and special processing methods of BAS preservation. The research included the method of water-activated granulation while 20% ethyl was used as a wetting agent. To obtain the granulate, lactose (Russia) and AEROSIL® 200 Pharma (Evonik Industries, Germany) were used as additive agents. As a result, capsules with a dosage of 700 mg were developed. The BAA can be produced on food and pharmaceutical plants.

scholarly journals Influence of stubble biodestructor on soil microbiological activity and grain yield of winter wheat (Triticum aestivum L.)

2021 ◽  
Vol 13 (4) ◽  
pp. 11035
Author(s):  
Antonina PANFILOVA
Keyword(s):  
Winter Wheat ◽  
Grain Yield ◽  
Crop Residues ◽  
Spring Barley ◽  
Soil Layer ◽  
Experimental Studies ◽  
Research Field ◽  
Microbiological Activity ◽  
Harvest Residues ◽  
Post Harvest

The aim of the work was to improve soil fertility and increase the yield of winter wheat using the stubble biodestructor by activating the microbiological activity of the soil. The experimental studies were on the research field of Mykolayiv National Agrarian University (Ukraine). After harvesting the precursor cultures of spring barley and peas the post-harvest residues of these crops were treated with a stubble biodestructor. After treatment of crop residues of spring barley and pea by the stubble biodestructor in the soil layer of 0 up to 20 cm the quantity of cellulose-destructive microorganisms increased by 27.9·105 up to 36.0·105 cfu/g of soil depending on the predecessor culture and the degree of degradation of these residues increased by 31.4 up to 45.1%. The number of nitrogen fixators in the 0-10 cm soil layer grew under the action of treatment of crop residues of spring barley and peas by stubble biodestructor on 13.4 up to 14.1 ·106 cfu/g of soilor 30.3 up to 35.0%. At the same time, a somewhat large number of bacteria in the soil was determined by the processing of post-harvest residues of peas, which was due to the biological characteristics of this legume culture. The average for years of researches at cultivating of winter wheat after spring barley using the stubble biodestructor the grain yield increased by 0.45 t ha–1, or 20.9%, and after pea it increased by 0.67 t ha–1 or 18.8% compared to the treatment variant of stubble just with water.

scholarly journals Analysis Of Vibration And Oscillation Sources Of Machine-Tractor Aggregates Units

2019 ◽  
pp. 72-79
Author(s):  
I. V. Galych
Keyword(s):  
Spectral Density ◽  
Soil Fertility ◽  
Dynamic Loading ◽  
Labor Productivity ◽  
Agricultural Production ◽  
Energy Intensity ◽  
Experimental Studies ◽  
Ecological Indicators ◽  
Active Damping ◽  
Agricultural Machine

With the increasing speed of machine-tractor aggregates, the energy intensity of tractors and labor productivity increases. In turn, this leads to an increase in the dynamic loading of nodes and components of machine-tractor aggregates, an increase in the level of oscillation and the emergence of dynamic and vibrational loads, which negatively affects both the node and components of the tractor or the aggregate, and the implementation of agrotechnical requirements. An analysis of recent studies and publications has shown that the introduction of energy-intensive technology into agricultural production leads to a decrease in soil fertility due to spraying and re-compression by engines, which aggravate agro-ecological indicators. In the study, the analysis of sources of vibrations and oscillations of elements of machine-tractor aggregates is presented. The frequency of influence on machine-tractor aggregates of various agrofones at different speeds of motion is analyzed. Experimental studies have determined the spectral density of the hook effort of the tractor during cultivating on disk field and steam. The results of experimental studies of the active damping system are presented. The result of the study is the suggestion to reduce the oscillations of the tractor and agricultural machine to justify comprehensive measures that prevent deterioration of the conditions of the unit. Fluctuations of the tractor, caused by sources of excitations, lead to deterioration of the performance of agrotechnical requirements due to the non-straightforwardness of the trajectory of motion, redevelopment of soil. To reduce the vibrations of the tractor and the agricultural machine it is necessary to substantiate the complex measures that prevent deterioration of the conditions of the unit

Influence of agromeliorative measures on the density and water yield of sodpodzolic soil when irrigated with livestock runoff

2020 ◽  
pp. 27-32
Author(s):  
Viktor Kopytovskiy
Keyword(s):  
Water Loss ◽  
Land Reclamation ◽  
Soil Layer ◽  
Experimental Studies ◽  
Field Research ◽  
Perennial Grasses ◽  
Water Yield ◽  
Run Off ◽  
Experimental Justification ◽  
Reclamation System

The article discusses the results of long-term field research on irrigation of perennial grasses with livestock runoff. The aim of the research was the experimental justification of land reclamation measures and drainage-free run off during irrigation of land with runoff from pig-breeding complexes. Experimental studies were conducted on a specialized reclamation system in Orsha district of Vitebsk region, where the soil cover is represented by sod-podzolic loamy soils. The experimental design included 8 options. As a result of research, it was found out that irrigation with livestock runoff leads to compaction of the upper soil layers. In the arable layer of 0–20 cm, the additional density increased from 1.26 to 1, 32 g/cm3, or 4.8 %, compared to the control, and in variants with irrigation and drainage measures, the compaction was somewhat less. In the soil layer of 0–40 cm, deconsolidation was greater only in the variants with soil deepening and loosening by 4 %, and when applying straw – by 5.1 %.In the 0–60 cm layer, a decrease in the density of addition was observed only in the variants with deep loosening and the introduction of straw. It was also found out that soil water loss varies over time. It is most intense in the first 2–3 hours and almost completely stops after 10–18 hours for monoliths with a thickness of 0.4–0.6 m, and in monoliths of 1.0 m, after 36–48 hours. The highest intensity of water loss was registered in options 5, 6 and 7. The lowest was in the control variant and option 2, where no land reclamation measures were taken. In options 5, 6 and 7, a decrease in the intensity of water loss by years was noted. Thus, in option 5 in 2000, water loss amounted to 0.9 mm /h, in 2001 – 0.87 mm/h, and in 2002 – 0.85 mm/h. Similar patterns were revealed in options 6 and 7. In the control option and option 2 without agro-reclamation measures, the intensity of water loss also decreased. The decrease in the intensity of water loss over the years is associated with changes in the density of the soil caused by anthropogenic impact on it. First of all, with compaction by farm machines and ongoing irrigation of perennial grasses.

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