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2 Journal of Ecological Engineering

2 2019

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The Use of Biochar for the Production of Organic Fertilizers

Czekała Wojciech, Jeżowska Aleksandra, Chełkowski Dawid

Journal of Ecological Engineering

2019

Vol. 20, nr 1

1--8

The fertilizer management is one of the greatest challenges of agriculture in the 21st century. The growing demand for food, along with the similar amount of arable land, creates the necessity of increasing the crop yields in a given area. Due to the fact that the production and use of mineral fertilizers often influence the environment in a negative way, for many years more attention has been paid to natural and organic fertilizers. Their advantage is the transfer of not only organic matter but also nutrients to the soil. In connection with the structural changes in agriculture, the production of natural fertilizers, especially manure decreases, but at the same time, the production of other organic fertilizers, e.g. composts or biochar increases. The aim of the work was to present the possibility of using biochar in the production of organic fertilizers. Moreover, the project concept for obtaining an organic fertilizer containing biochar and its application in the processes of biological transformation of waste was presented.

A Possibility of Functioning Biogas Plant at a Poultry Farm

Janczak Damian, Mazurkiewicz Jakub, Czekała Wojciech, Myszura Magdalena, Kozłowski Kamil, Jeżowska Aleksandra

Journal of Ecological Engineering

2019

Vol. 20, nr 11

225--231

The biogas production constitutes one of renewable energy sources (RES) . In addition, wastes are preferred for energy production. In the case of some wastes, e.g. poultry manure, it is difficult to conduct anaerobic digestion in monofermentation. The aim of this work was to plan the biogas plant, in which the main substrate is the waste from a poultry farm. The scope of work included: preparation of a biogas plant technological project, determining the amount of biogas and methane that can be produced annually on the example of the selected poultry farm, performing the energy and financial calculations for the current conditions prevailing on the renewable energy market in Poland. The installation project assumed the location of a biogas plant at an existing poultry farm – the source of the substrate. The micro-biogas plant includes a fermentation tank with a capacity of 500 m3 and storage of digestate pulp with a capacity of 700 m3. The assumed power biogas plant will generate 112 kW of electricity and 120 kW of heat. The installation will operate in a single-stage mesophilic technology (39 °C), which will avoid incurring additional costs related to heating and the construction of additional fermentation tanks. The use of poultry manure by anaerobic digestion provides benefits through biogas technology. It is necessary to examine the technology in terms of biogas production, which is carried out under better sanitary and environmental conditions. This work was undertaken to investigate the environmentally friendly removal of poultry manure through biogas technology to obtain the best economic effect, and employ it further, e.g. as a fertilizer.