Krzysztof Dziedzic

Krzysztof Dziedzic
University of Agriculture in Krakow | UR · Department of Mechanical Engineering and Agrophysics

Doctor of Engineering; Ph.D.

About

31
Publications
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271
Citations

Publications

Publications (31)
Article
Full-text available
The combustion of waste biomass is becoming a key challenge for the energy sector, especially in times of growing energy demand and increasing environmental awareness of society. Processing such fuels is usually demanding. Mathematical modeling makes it possible to adapt the course of the process. The best option is to use appropriate fuel mixtures...
Article
Full-text available
Biogas production is an important component of sustainable energy management. In addition to energy-rich biogas, this process also generates solid waste in the form of digestate. The management of this stream has been problematic for many years. One promising method of utilizing this fraction seems to be incineration under controlled conditions. Th...
Article
Full-text available
Increasing production of waste has compelled the development of modern technologies for waste management. Certain fractions of municipal solid wastes are not suitable for recycling and must be utilised in other ways. Materials such as refuse-derived fuel (RDF) fractions are used as fuel in cement or CHP (combined heat and power) plants. The low bul...
Article
Full-text available
Soil microorganisms play a key role in many biochemical processes essential for the environment and for the ecological and production functions of soils, hence they are very important quality indicators. The study aimed at evaluating the effect of 1 and 2% additions of wheat and miscanthus straw biochars on soil enzymatic activity (dehydrogenases,...
Article
Full-text available
The paper deals with the theoretical and experimental investigation of the main characteristics of woody crop cuttings unloading from the hopper. To create a variety of automated systems for material feed there is a need to ensure high performance selecting and unloading the material, in particular, it is of vital importance in designing machines f...
Article
Full-text available
The aim of this study was to determine selected energy parameters, leachability of heavy metals and phytotoxicity of biomass ash for different types of plant biomass (wheat straw, miscanthus straw, bark and sawdust) and poultry manure, as well as biochars produced from them. Based on data from proximate and ultimate analysis of the investigated mat...
Article
Full-text available
In Poland, biomass is still considered as the basic source of renewable energy. Energy from biomass accounts for 15 % of global energy consumption, while in developing countries this share is higher. The main advantage of biomass is lower emissions of sulphur dioxide during combustion compared to fossil fuels. The main sources of biomass for produc...
Thesis
The paper presents an experimental and numerical (based on the mathematical model) analysis of the mechanism and kinetics of waste biomass combustion. The research material comprised four types of digestates from biogas production, obtained by methane fermentation of a mixture of apple pomace and corn silage with different percentages of individual...
Conference Paper
Full-text available
Останнім часом відбулися помітні зміни в енергетичній галузі України, зокрема у сфері відновлюваних джерел енергії, а також індивідуального та централізованого теплопостачання. Все більшого значення набувають питання енергетичної безпеки країни, зменшення залежності від імпортованих енергоносіїв, перш за все природного газу. Спостерігається поступо...
Chapter
Full-text available
The authors of this study aimed at evaluating the influence of plant biomass added to sewage sludge on the product energy potential. In order to improve its physical properties, sewage sludge was mixed with wheat straw, sawdust, and bark of conifers. Materials with a natural water content were mixed at 1:1 weight ratio on a dry matter basis. The sc...
Article
The paper presents the results of research work aimed at determining process parameters for production of quality briquettes from Miscanthus raw material. Raw material was obtained from southern Ukraine from the autumn harvest. The obtained results clearly indicate that adequate grinding, humidity reduction of less than 15% and application of agglo...
Article
The paper presents research aimed to determine the potential of waste biomass from the processing of mustard. Raw material for research came from the central part of Ukraine. Studies have shown that mustard residues are a valuable raw material for the production of solid biofuels in the form of briquettes or pellets. Values of quality parameters (s...
Article
Full-text available
The paper presents the results of research aimed at determining the influence of the composition of the fertilizer mixtures and the compaction pressure on the specific density and density index of fertilizer granules. Investigated mixtures were prepared from fly ash from power plant fuelled by biomass and digestate from biogas plant. The urea, sulf...
Article
Full-text available
Paper presents a concept of the mobile line for the production of granulated fertilizer from digestates and ash mixtures. The main assumption of the designed line is its mobility which allows line work in the place of production of digestate. The premise for developing such model of line was the fact that the transport of highly hydrated digestate,...
Article
Full-text available
Paper presents design process of the prototype line, dedicated for production of fertilizer pellets from digestate-ash mixture. For enrichment of the nutritional characteristics of the final product additives were also used, like urea, elemental sulphur or phosphorite, and special fungal strains from Trichoderma spieces. During this process raw mat...
Book
Full-text available
The tutorial consists of two interrelated parts. The first of them gives an idea of modern structural materials and their main properties, and the second one contains information necessary for the practical manufacture of parts and assembly operations. Part One "Materials Science", consists of 8 sections: Section 1. "Structure, properties and metho...
Article
The authors introduced plastic pyrolytic oil as an alternative fuel characterized in detail and compared to properties of conventional fuels, such as kerosene and diesel. The mixture of polyethylene and polyprophylene was pyrolyzed in a specialistic reactor to produce oil fuel. The mixture was completely pyrolyzed at 420–450 °C for 2 h to obtain th...
Article
Full-text available
This article is a continuation of the first part of the article flue gas cleaning in municipal Waste-to-Energy plants – part I. The first part contains an extensive introduction to the subject of flue gas cleaning and cover subjects: reduction of dust and particle-bounded heavy metals as well as NOX reduction. The second part focuses on reduction o...
Article
Full-text available
All plants based on combustion of the fuel generate a large number of flue gases, which contain variety of pollutants. These include particulates , heavy metals (Hg, Cd, Tl, As, Ni, Pb), carbon compounds (CO, hydrocarbons (VOCs), (PCDD / F, PCB), acid and other gases (HCl, HF, HBr, HI, SO 2 , NO x , NH 3), whose emissions are controlled, and subjec...
Article
Full-text available
The impact of biomass addition to the RDF oversize fraction on quality parameters obtained from this blend of briquettes produced under semi-industrial conditions was analysed. For the purposes related to the experiment four RDF mixtures with fragmented biomass of common willow Salix viminalis L., differing only with percentage participation of bas...
Article
Full-text available
Technology of processing of agricultural raw material and production residues from agri-food industry often requires their dewatering. Digestate is one of such materials i.e. the mass remaining after the bio-gasification process, which has great hydration (above 85%). The objective of the research was to know the impact of dewatering on the change...
Article
Full-text available
The paper presents the results of research, the objective of which was to determine the impact of particle size distribution and density of digestates and ash on density and tensile strength of granular fertilizer obtained from mixtures of these substrates. Particle size distribution, absolute density, envelope density and porosity of substrates we...
Conference Paper
Full-text available
The article presents the possibilities of using products made in the process of dry distillation of plastic waste (with a focus on the liquid fraction) as a fuel in CHP generators. Article contains characteristic of depolymerization process and description of machines which are used for it. It shows the advantages of the depolymerization process ov...
Article
Full-text available
The article discusses an innovative system used for aerobic biostabilisation and biological drying of solid municipal waste. A mechanical–biological process (MBT) of municipal solid waste (MSW) treatment were carried out and monitored in 5 bioreactors. A two-stage biological treatment process has been used in the investigation. In the first step un...
Article
The article discusses an innovative system used for aerobic bio stabilisation and biological drying of solid municipal waste. A mechanical-biological process(MBT) of municipal solid waste (MSW) treatment were carried out and monitoredin 5 bioreactors. A two-stage biological treatment process has been used in the investigation. In the first step an...

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