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Number of results: 8
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Abstract

Dependence Between the Residential Area Type and the Sense of Security. The Case of Poznań. The need for safety is one of the most important needs of every person. The sense of security level depends to a great extent on the place of residence. The study aims at showing the relationship between the residential area type and the sense of security in Poznań. The author uses the results of the survey on the crime risk conducted among Poznań inhabitants and assess the sense of security level of the following types of residential area: tenement houses area, blockhouses area, dettached houses area and the city center. In the opinion of inhabitants, the highest sense of security level was in the dettached house area. The following positions included: the city center and the blockhouses area. The lowest sense of security level was characteristic for the tenement houses area. The time of the day was at great importance in the context of respondents assessments, during the day the sense of security level was higher than at night, regardless to the residential area type.
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Abstract

Selected issues of immovable monuments in planning documents, The work concerns selected issues of immovable monuments in planning documents of the communes: Bielice, Gryfino, Kołbaskowo, Stare Czarnowo i Widuchowa. The proceedings aimed at comparison of heritage and cultural landscape contents in: studies of conditions and directions of communes spatial development, the register of the National Heritage Board of Poland and the Spatial Development Plan of the Westpomeranian Region. This allowed to show inconcistencies in the aspect of cultural heritage in planning documents and to indicate good practices in the proces of caring for material cultural heritage.
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Abstract

Advanced automotive fleet repair facility wastewater treatment was investigated with Zero-Valent Iron/Hydrogen Peroxide (Air/ZVI/H2O2) process for different process parameters: ZVI and H2O2 doses, time, pH. The highest Chemical Oxygen Demand (COD) removal efficiency, 76%, was achieved for ZVI/H2O2 doses 4000/1900 mg/L, 120 min process time, pH 3.0. COD decreased from 933 to 227 mg/L. In optimal process conditions odor and color were also completely removed. COD removal efficiency was increasing with ZVI dose. Change pH value below and over 3.0 causes a rapid decrease in the treatment effectiveness. The Air/ZVI/H2O2 process kinetics can be described as d[COD]/dt = −a [COD]tm, where ‘t’ corresponds with time and ‘a’ and ‘m’ are constants that depend on the initial reagent concentrations. H2O2 influence on process effect was assessed. COD removal could be up to 40% (560 mg/L) for Air/ZVI process. The FeCl3 coagulation effect was also evaluated. The best coagulation results were obtained for 700 mg/L Fe3+ dose, that was slightly higher than dissolved Fe used in ZVI/H2O2 process. COD was decreased to 509 mg/L.
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Abstract

Five cosmetics wastewater samples were treated by Dissolved Air Flotation (DAF) assisted by coagulation. Different aluminum based coagulants were used: (Al2(SO4)3, Al 1019, Al 3010, Al 3030, Al 3035, PAX 16 and PAX 19). The raw wastewater COD values were in the range 285-2124 mg/l. The efficiency of DAF depended on different coagulants and production profi le of factory. COD removal was varied from 11.1 to 77.7%. The efficiency of coagulants was similar during treatment of particular sample. The best results were obtained with Al2(SO4)3 and for sample 5 - lotions and shampoos production. The wastewater from UV fi lter creams production (sample 4) was resistant to treatment by DAF regardless of used coagulant. HS-SPME-GC-MS analysis can be a confirmation of DAF effectiveness
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