Piotr Sołowiej

University of Warmia and Mazury in Olsztyn · Faculty of Technical Sciences

Traditional wastewater purification processes are based on a combination of physical, chemical, and biological methods; however, typical electrochemical techniques for removing pollutants require large amounts of electrical energy. In this study, we report on a process of wastewater purification, through continuous anodic dissolution of iron anode...

Animal biomass is an important substrate in the anaerobic digestion process. The implementation of a waste technology for energy production, such as the production of biogas from animal waste, has been recognized in many countries as one of the best ways to achieve the Sustainable Energy Development Goals. Without a systematic review of resources a...

Composting is the natural, exothermic process where the huge amount of heat that is created is an issue of organic matter decomposition. However, too high temperature can reduce the microbial activity during the thermophilic composting phase. The aim of this study was to analyze the effect of heat excess removal from composted materials on the proc...

In 2020, a fully automated hydropower plant was launched on the Guber River near the town of Kotkowo. The plant is operated by a master control and measurement system, which collects data to evaluate the operation of selected systems of the facility. The number and location of sensors controlling the parameters of hydroelectric systems are selected...

Although cow manure is a valuable natural fertilizer, it is also a source of extreme greenhouse gas emissions, mainly methane. For this reason, this study aims to determine the impact of investments in a biogas plant on the energy and economic aspects of the operation of a dairy farm. A farm with a breeding size of 600 livestock units (LSU) was ado...

As part of the search for effective ways of obtaining energy, a model of a ground heat exchanger was built. It is an element of the ventilation system of a residential building. In order to develop methods for designing ground heat exchangers, it was necessary to build a model to simulate the operation of such an exchanger in laboratory conditions....

The article presents the results of a study aiming to select the optimal source of heat for a newly designed single-family home. Commercial software was used to compare heating and ventilation systems involving a bituminous coal boiler, a condensing gas boiler, a biomass boiler, and a heat pump with water and glycol as heat transfer media. The effe...

Scots pine ( Pinus Sylvestris ) is a very popular tree species in north-eastern Poland. Pines are frequently encountered in allotment gardens in the proximity of residential buildings. Pine biomass should not be composted because the produced humus has acidifying properties. For this reason, the management of pine waste biomass poses a problem. The...

The paper presents a concept of building a passive heat transport system based on the use of an antigravity thermosyphon with a bubble pump. Such solutions are suggested when the heat source is located above the place of its reception, e.g. in the case of solar collector installations. One of the components of the system is the device forcing the c...

During the composting process, waste biomass with high moisture content undergoes various transformation in the presence of oxygen. The composting process is analyzed in dedicated bioreactors which are air-tight facilities with external air supply. Subject to the type of composted plant material, biomass should be periodically turned to promote eve...

The volume of sewage sludge generated in Poland has increased significantly in the last two decades due to the construction of new wastewater treatment plants and the upgrading of the existing facilities. Composting is a highly effective method of managing sewage sludge. Sewage sludge has specific physicochemical properties, and it has to be combin...

Sewage sludge was composted with the addition of straw and sawdust to modify the C: N ratio of dry matter. The experiment was conducted in closed and insulated bioreactors, at four C: N ratios: 9.2, 12.1, 17.0 and 26.4. The following parameters were measured during the composting process: temperature inside the bioreactor, aeration rate, ammonia an...

A condition of obtaining compost with proper sanitary parameters is achieving the organic recycling process temperature which exceeds 7°C. The objective of the paper was to determine the temperature course in the compost tank for organic recycling of dead poultry in relation to the applied structure forming material. Wheat, oat, barley, rapeseed an...

The objective of the paper was, inter alia, to determine the impact of coffee grounds on the heat of combustion of their combination with other biological materials. Research on the heat of combustion and calculations of the calorific value were carried out with the use of a KL-12 Mn calorimeter according to the technical specifications and standar...

More than 95% of electric power in Polish power plants is produced from coal. This results in the emissions of large volumes of CO2 into the atmosphere, hence in some power plant alternative methods of electric power generation are being implemented. One of the many possible solutions is to produce electric power from biomass. There are two biomass...

This paper shows the concept and preliminary test of the composting process control with fuzzy logic. The temperature in the compost heap during the process is greater than 80 °C. Because wastes of agricultural origin do not require hygienization, part of the heat can by retrieved, which lowers the temperature in the heap to 55 °C (this is also the...

Streszczenie. Badaniami prowadzonymi w latach 2001-2006 objęto zespół dziewięciu elek-trowni wodnych o łącznej mocy 14,58 MW, usytuowanych na rzece Raduni w regionie po-morskim. Badany zespól elektrowni produkuje rokrocznie blisko 30⋅10 3 MWh, przy czym najwięcej energii wyprodukowano w 2002 roku a najmniej w 2006. Dokonano identyfikacji czynników...

Streszczenie. Kompostowanie jest znane od dawna jako sposób efektywnej i bezpiecznej utylizacji odpadów biologicznych pochodzenia rolniczego. W fazie pierwszej-mezofilnej ba-danego procesu występuje wysoka aktywność mikroorganizmów, wykorzystujących łatwo-degradowalną materię organiczną – zwłaszcza cukry i aminokwasy. Badania przedstawione w artyku...

Streszczenie. Na Wydziale Nauk Technicznych Uniwersytetu Warmińsko-Mazurskiego w Olsztynie przeprowadzono badania ankietowe dotyczące umiejętności wykorzystania sprzętu komputerowego oraz wybranego oprogramowania użytkowego wśród studentów kie-runku Technika Rolnicza i Leśna. Analiza wyników badań wykazała znaczne zróżnicowanie poziomu znajomości p...

Streszczenie. W pracy przedstawiono możliwości wykorzystania modelowania neuronowego w celu wyznaczenia momentu w którym należy rozpocząć nawadnianie upraw. Właściwy moment rozpoczęcia nawadniania umożliwia uniknięcie przesuszenia roślin, a jednocześnie pozwala na bardziej efektywne wykorzystanie systemów nawadniających uprawy (np. desz-czowni). Ja...

Streszczenie. W pracy przedstawiono szczegółową analizę możliwości zastosowania tech-nologii zgazowywania biomasy odpadowej pochodzenia rolniczego, oraz wykorzystywania otrzymywanych w ten sposób gazowych nośników energii, po odpowiednim ich wcześniej-szym przygotowaniu, do zasilania silników spalinowych mogących stanowić źródło energii w układzie...

Streszczenie. W pracy przedstawiono wyniki badań mających na celu określenie potencjału energetycznego i przewidywanych możliwości jego wykorzystania dla powiatu gołdapskiego leżącego w północno-wschodniej części województwa warmińsko-mazurskiego. Warunki klimatyczne i gospodarcze powiatu określają jego potrzeby energetyczne oraz wskazują na możliw...

Streszczenie. Powstające w ostatnich latach coraz większe plantacje wierzby energetycznej są narażone na atak owadów, które w trakcie gradacji mogą zniszczyć całą plantację. W pra-cy utworzono model matematyczny opisujący rozwój populacji owadów. Na bazie tego mo-delu oraz danych z rzeczywistych plantacji – takich jak: dane geograficzne (tj. wielko...