The goal of the presented research works is to prove the following thesis: Does the process of contaminants reduction and effiuent application for arable land fertilization justify the treatment method of waste water from a yeast production facility in soil and plant environment. In order to achieve the above mentioned goal, basically the dynamics of physical and chemical properties change observed for waters, soils and plants irrigated with wastewater from yeast factory has been studied for many years. Part I presented the problems characteristics of production as well as water and wastewater management in the yeast factory, principles and technological effectiveness of the treatment of process wastewater from yeast production in soil - plant environment and impact of irrigation with wastewater on water purity. The research proved that very high biological treatment indices are achieved on the Silesian Yeast Factory fields where process wastewater is utilized i.e. concentration reduction for: BOD5 - 99.3% and COD - 99.7%, - for eutrophic compounds: N,0,.1 - 98.83%, P - 96.25% and K - 99.18%. The obtained percentage of concentration reduction is higher than the standards assumed in the water supply and wastewater discharge consent issued to the factory. The drainage water from the fields irrigated with yeast effluent is of I, II and III class of purity.

This paper presents a new interim check device for coordinate measuring machines (CMMs) built from an AISI 1020 carbon steel bar with the incorporation of calibrated spheres. This artifact’s construction was made to make the interim checks of machines of this type faster and cheaper. Three devices were designed based on the ISO 10360-2 standard, the good practice guide No. 42 (NPL), and prominent authors’ research on the subject. The three options are presented in detail, but only one was built due to budget, size, and adaptability restrictions. An exploratory study was conducted to verify the device’s usability in two CMMs and concluded that the differences between the measurements are not significant. However, one machine had absolute variation values and a total standard deviation higher than the other, generating a larger expanded uncertainty.

Fortyfication Objects of Prussian Ring Fortresses in Poznań and Wrocław (from XIX–XX Cent.) in Current Spatial Planning Documents – Functioning, Protection, Landscape Shaping, Fortifications are valuable elements of cultural heritage of many Polish cities. Unfortunately, in many cases they are not properly used and protected, although some of them have the status of historical monuments. Potentially, tools for strengthening protection of fortifications are provided by spatial planning system. The research was based on detailed analysis of the Study of the Conditions and Directions of the Spatial Management of a Communes and Local Spatial Management Plans, including the area of ring fortresses in Poznań and Wrocław. In the Study of the Conditions and Directions of the Spatial Management of a Commune of both cities one can find references to the location and use of ring fortifications. The area of fortification objects in Poznan is covered by 9 Local Spatial Management Plans, 5 further plans covering the fortifications are in preparation. The area of ring fortress in Wroclaw were covered by 9 Local Spatial Management Plans. The results of the analysis of the spatial planning documents show that the tools used to protect the fortifications offered by the spatial planning system are not fully exploited. The context and landscape values of the fortifications are ignored in most of the plans. Also one can find in spatial planning documents the lack of attempts to link fortress greenery to the greenery system, and, in the case of Wroclaw, the lack of describing fortification greenery as a valuable asset. In most cases, principals of the fortifications objects protection are not enough detailed.

Methane is accompanied by most of the coal deposits. The methane hazard is excessive content of this gas in the mining excavations. This is a source of high risk security and continuity of the mine. The Piast–Ziemowit is the only non-methane mine in the Polish Mining Group. In 2015, 66,4% of the coal mined in Kompania Węglowa S.A. mines comes from methane coal seams. Methane drainage is the most effective but very costly method of combating methane hazard.The costs of prevention and eradication of methane hazard is charged to the costs of coal mining. Therefore, performance of methane drainage in the mines of the Polish Mining Group is adapted to the scale of the methane hazard. The article presents an analysis of the costs of prevention of methane hazard for mines with different absolute methane and its impact on the level of these costs.

This paper presents a model of scheduling of multi unit construction project based on an NP-hard permutation flow shop problem, in which the considered criterion is the sum of the costs of the works' execution of the project considering the time of the project as a constraint. It is also assumed that each job in the units constituting the project may be realized in up to three different ways with specific time and cost of execution. The optimization task relies on solving the problem with two different decision variables: the order of execution of units (permutation) and a set of ways to carry out the works in units. The task presented in the paper is performed with the use of a created algorithm which searches the space of solutions in which metaheuristic simulated annealing algorithm is used. The paper presents a calculation example showing the applicability of the model in the optimization of sub-contractors' work in the construction project.