Sławomir Obidziński

Bialystok University of Technology · Department of Agricultural, Food and Forestry Engineering

Pomace from apples, grapes, blackcurrants, and oranges is a waste product of fruit processing, which is formed during the production of juices. Pomace is a rich source of biologically active compounds such as polyphenols, carotenoids, or vitamins. They also contain pectin, cellulose, lignin, proteins, and minerals. All these components, apart from...

Stabilized municipal sewage sludge and selected waste from agri-food processing can be used for agricultural purposes, which is part of the circular economy. Therefore, chosen residues were tested for the possibility of using them for fertilisation purposes. They were then subjected to the process of composting in a bioreactor with artificial aerat...

The aim of the present study was to evaluate the effect of rye bran addition on the pelleting process of sage waste biomass, and the quality and energetic properties of fuel pellets. The pelleting process was conducted on an SS-4 test stand equipped with a P-300 pelletizer with flat die roller compactors. The addition of 20% rye bran reduced the pe...

The amount and variety of waste increases every year. One of the places where biodegradable waste is generated is the agri-food industry, where it is possible to utilize it for the purpose of energy production. The aim of this research was to determine the possibility of using post-floatation dairy sludge as a raw material for co-pelletization with...

Buckwheat husks are a valuable source of carbon and show the potential to be used as an energy source. However, due to low bulk density and low susceptibility to compaction, it is beneficial to use them in the form of co-pellets. The study presents comprehensive research detailing buckwheat husks' potential for co-pelletization with oily (peanut hu...

This paper presents a proposition of innovative thermoplastics bio-resorbable composite materials based on polylactic acid. The compositions were prepared as an alternative to traditional biodegradable polymers, using grounded and dried plant waste in the form of buckwheat husks and dried onion husks. The main goal of the research was to develop ne...

W 10 próbkach mięsa drobiowego (świeżego, pieczonego, gotowanego lub liofilizowanego), pochodzących ze sklepów spożywczych oznaczono zawartość azotanów(III) i azotanów(V). Próbą referencyjną było mięso drobiowe z hodowli domowej. Najmniejszą zawartość azotanów(III) i azotanów(V) stwierdzono w mięsie pochodzącym z wiejskiej (własnej) hodowli drobiu....

The process of pelleting miscanthus biomass often encounters issues related to the low durability of the obtained pellets and high energy inputs. To solve these issues, the use of copra meal as a supplement is proposed. This paper presents the results of research on energy parameters of miscanthus biomass pellets supplemented with copra meal in ter...

The paper presents the results of the pelletization (agglomeration) tests of post-harvest tobacco waste as a feedstock for fuel pellet production. The experiment was conducted on a prototype pelleting–briquetting device with a flat matrix. The influence of the tobacco waste moisture content (17, 21 and 25wt.%) and the rotational speed of the agglom...

Agri-food waste is generated at various food cycle stages and is considered to be a valuable feedstock in energy systems and chemical syntheses. This research identifies the potential and suitability of a representative agri-food waste sample (i.e., plum stones) as a solid fuel. Ground plum stones containing 10, 15, and 20 wt.% of rye bran were sub...

The aim of the described research was to assess the suitability of onion husk waste as a material for the production of solid fuels in the form of granules (pellets). Due to the low susceptibility to thickening of onion husks, the addition of a binder in the form of potato pulp was used (waste with a high starch content). Both wastes were subjected...

The paper presents the research results of the impact of reduced graphene oxide (RGO) on selected mechanical and functional properties of LDPE foil. The foils were made by blow extrusion, with different amounts of RGO added to the granulate prior the extrusion process. Prepared foil samples were assessed for mechanical properties in a static tensil...

The aim of the presented research was to determine the suitability of cherry stones as a solid fuel. Mixtures of cherry stones with the addition of 10%, 15%, and 20% rye bran as a binder were subjected to the pressure agglomeration process in a rotary matrix working system (170, 220, and 270 rpm). The density of pellets, their kinetic durability, a...

The research aim of this study was to assess the suitability for pellet production of bakery industry waste in the form of "sponge flour" in a mix with peanut postproduction sweepings (20%, 30%, 40%, 50%). An increase in the content of peanuts (from 20% to 50%) in the mix was shown to increase the power demand of the pelleting system and the physic...

Worldwide the search for new raw materials that are suitable for the production of energy pellets is increasing. Each new raw material undergoes evaluation through various analytical processes and quality assessments before being considered for use as energy pellet. In recent times, the raw materials such as agricultural, forestry, and food waste,...

Urządzenie do obróbki przedsiewnej nasion, wyposażone w kosz zasypowy i zbiornik na obrobione nasiona znamienne tym, że w dnie kosza (1) zasypowego zamontowany jest dozownik (2) roweczkowy nasion, a pod nim zamontowany jest przenośnik (3) poziomy z umieszczonym pod nim wibratorem (9) osłonięty płaszczem (4) ochronnym, przy czym nad przenośnikiem (3...

The purpose of the research was to assess the suitability of the milling industry waste, in the form of rye bran, as a supplement to sawdust, as a component of a granular blend, with its purpose for fuel purposes. The specific purpose of the study was to determine the effect of rye bran content in the mixture with sawdust on the power demand of a g...

The aim of the research was to examine the pressure agglomeration process of agri-biomass waste ie. straw with an additive of 20% hard coal. The analyzed parameters included as independent variables the process temperature and the moisture content of the substrate mixture. During the experiment there were examined the maximum densifying pressures a...

A granulate produced of a hemp harl with 20% addn. of potato pulp as a binder and a hard coal sample were sep. combusted to study the post-reaction gas compns. Biomass combustion resulted in much higher CO and HCl emissions.

The paper presents results of microbiological research of plastic elements. Plastic elements were made of the polystyrene composition with addition of nanosilver and nanocopper with a laboratory extruder EHP 25ELine. Microbiological research was carried with regard to evaluation of antifungal impact of nanoadditives according to international stand...

The study evaluates granulated coffee grounds use as an additive to soil. Specific physico-chemical and functional properties of soil that enable assessment of its fertility and that have a possible impact on plants growth and development were analysed. The research proved that granulated coffee grounds added to soil increase sorption properties an...

Potato pulp was added (5, 20, and 25% by mass) to buckwheat husks and granulated in the lab. stand (mass flow rates of raw materials 100, 150 and 200 kg/h) by using (i) removable flat matrix (diam. of holes 6, 8 and 10 mm) and (ii) thickening rolls (speed 120, 170 and 220 rpm) to det. the best kinetic strength of obtained granules with min. energy...

Sewage sludge was mixed with coal and with used frying oil and then combusted in a lab. stand with a 25 kW retort grade. The flue gases were studied for chem. compn. (CO, CO2, SOx, NOx, HCl) and for O2 losses. The small addn. of used frying oil resulted in an increase in CO2 concn. in the exhaust gas (from 5.32 to 6.74%) and a decrease in CO conten...

This paper compares the densification work necessary for the pressure agglomeration of fine-grained dusty nettle waste, with the densification work involved in two-stage agglomeration of the same material. In the first stage, the material was pre-densified through coating with a binder material in the form of a 5% potato starch solution, and then s...

The paper presents selected results of performance tests of working elements of a wood machining device. The focus was on operational durability of its working elements. In order to assess the condition of these elements, tests of mechanical properties , the chemical composition of the operational surface layer, and microscope observations of selec...

The article presents an innovative mixing-densifying-dosing system of a pelletizer, which feeds plant material to the densifying system. The structure of the system allows simultaneous realization of the mixing operation as well as non-pressure compression of powdery fractions of the processed material. The paper also sets forth results of the pres...

This paper presents a prototype universal testing device for determining the kinetic durability of products of pressure agglomeration (pellets and briquettes). The device presented in the paper is equipped with replaceable test chambers, making it possible to combine Pfost's and Holmen's methods for the determination of kinetic durability of pellet...

The objective of the paper was to determine usefulness of a new, prototype pelletizing and briquetting device for the process of briquetting waste vegetal material. During research the impact of potato pulp content (15, 20 and 25%) in the mixture with buckwheat husk and the mass intensity of raw material flow (100, 150 and 200 kgh-1) on the demand...

Poniższa publikacja dotyka problemu realizacji innowacyjnych badań naukowych w zakresie agrofizyki. Charakterystyczną cechą agrofizyki, która jest stosunkowo nową dyscypliną naukową jest wykorzystanie metod fizycznych i fizykochemicznych do badań właściwości materiałów rolniczych i produktów rolnych oraz procesów zachodzących w układach gleba-rośli...

This paper presents the results of a research on the influence of potato pulp content in a mixture with oat bran on the power demand of the pelletization process and on the quality of the produced pellets, in the context of use thereof as a heating fuel. The tests of the densification of the pulp and bran mixture were carried out on a work stand wh...

The purpose of this research was to determine the influence of potato pulp content (15, 20, and 25%) in a mixture with buckwheat hulls and the variable mass flow rate of the mixture (50, 75, and 100 kg·h-1) on the following parameters: the density and kinetic durability of the obtained pellets, their heat of combustion, calorific value, and water a...

Celem badań było określenie najkorzystniejszych parametrów procesu zagęszczania mieszaniny roślinnych odpadów otrębów owsianych i wycierki ziemniaczanej, co pozwoliłoby na opracowanie technologii wytwarzania granulatu opałowego z tych odpadów. Badania przeprowadzono na stanowisku SS-3, z układem roboczym „otwarta komora zagęszczania-tłok zagęszczaj...

The results of investigations on the influence of material, process, and construction parameters on the densification process and density of pellets received from different mixtures of tobacco and fine-grained waste of lemon balm are presented. The conducted research makes it possible to conclude that postproduction waste eg tobacco and lemon balm...

The paper describes an attempt to analyse the usability of potato pulp as a future ecological solid fuel. The analysis of potato pulp, carried out within the framework of the study, comprised the following aspects: assessing energetic values of potato pulp, assessing the effects of burning solid fuel in the form of pellets made of potato pulp, asse...

The paper presents factors affecting the pressure agglomeration process of plant material and the quality of the received product as well as the test results of selected apparatus and process parameters on the density and kinetic durability of the received pellets. The tests were conducted in a technical scale on a SS-2 test stand whose basic compo...

W pracy przedstawiono wyniki badań wpływu czasu docierania matrycy pierścieniowej na obciążenia układu roboczego granulatora (maksymalne naciski zagęszczające materiał, moment obrotowy matrycy, zapotrzebowanie urządzenia na moc i energochłonność jednostkową procesu.

Streszczenie. W pracy przedstawiono czynniki mające wpływ na przebieg procesu ciśnie-niowej aglomeracji materiałów roślinnych i jakość uzyskanego produktu oraz wyniki badań wpływu wybranych parametrów aparaturowo-procesowych na maksymalne jednostkowe naciski zagęszczające uzyskane podczas procesu granulowania. Badania przeprowadzono na stanowisku b...