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This article presents the possibilities of using computer scanning to design a location for a sewage treatment plan taking into account its impact on the landscape. The activities undertaken could constitute a part of the proceedings carried out in performing environmental impact assessments. Completion of the goal requires literary studies and the analysis of interdisciplinary studies, including planning, land and academic research. The research has been divided into several parts, of which the first one concerns, among other things, the analysis of the value of the natural environment in a given area and analysis of the planning documents in place. The land research consists of scanning the area for the sewage treatment plant using the 3D method. The collected data will constitute the basis for the possibility of using computer scanning to visualise the development in an area of high landscape value.
The sewage treatment plant was monitored to determine the efficiency of technologies employed to reduce microbiological threats. Every four weeks, for a year, sewage was sampled to investigate the effects of post-mechanical and post-biological treatment. Changes in Escherichia coli, D-group streptococci and Salmonella spp. number were analyzed. The reduction of the bacteria in sewage treated mechanically was not significant and did not exceed 1 log. However, a significant reduction in an average number was found. In addition, seasonal variation was found to correlate with the number of each of the selected bacteria groups.
Influence of the wastewater from chosen food processing industries located in Szczecin on a quality of receiver’s water was presented. The theoretical part of the paper comprises general fundamentals of the biological treatment of the wastewater, the sources of the wastewater and their impact onto a sewerage system and the receiver at meat processing and dairy industries were also presented in this part of the paper. Szczecin Dairy and Szczecin Poultry Processing Company are both equipped with biological wastewater treatment plants. The treated wastewater is discharged to the receivers that are directly linked to River Odra, thus has an impact on the quality of River Odra water. Basing on a performed research on parameters of untreated and treated wastewater, the treatment performance of the wastewater treatment plants was described as well as an attempt to estimation of an impact of the wastewater onto the receiver was made.
Humic-like substances (HA) were extracted from sludge from three sewage treatment plants with dif­ferent treatment technologies. Investigations of the extracted humic-like substances (HA) were carried out by means of elementary analysis and spectroscopic methods. Results of elementary analysis show that the percentage content of nitrogen is different for HA ex­tracted from sludge derived from the subsequent treatment stages. The influence of the treatment process on nitrogen content also was observed. The percentage content of nitrogen was of the range from 5.05% to 8.99%. The highest value of nitrogen for HA extracted from sludge was obtained from the nitrification and denitrification chamber. The spectroscopic methods confirmed the presence of nitrogen functional groups.
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