The article presents results of research concerns amount and remove indices of nitrogen and phosphate in domestic sewage treatment plant. Analysis sewage treatment plants are objects working with method of active sludge. The first sewage treatment plant Turbojet EP-4 was installed in Pałecznica in province małopolska. The treatment plant works for Primary schools where about 100 children and theaters’ house inhabited 6 people. Second sewage treatment plant is called Biocompact BCT S-12 and was installed in Rajbrot village near Lipnica Murowana. It takes sewage from schools and a teachers’ house inhabited 12 people. Analysis of results of research concern four years 1999-2003, and in this time took sewers flow to and flow in to sewage treatment plants. The results of research of sewer analyzed statistical for characterize size concentration total nitrogen and phosphates in sewer. In analysis introduce frequency relativity of occurrence concentration indices of biogenic indices in clean sewer. Additionally characterize size of reduction indices in clean process. Composition in flow to sewer was type for living sewer. Mean reduction of biogenic indices was for nitrogen and phosphates for two treatment plant 63,6% and 51,4%. Mean values total nitrogen and phosphates in sewer flow to treatment plant Turbojet EP-4 ...
In paper analyzed the results of research concerning nitrate and total ni-trogen content in drainage effluents as well as surface water coming from facilities located in Lower Silesia area. Detailed analysis were made for participation of nitrate nitrogen in total nitrogen amount. Drainage effluents were characterized by significant content of total nitrogen: average concentration in research period amounted from 22,4 mg N dm3 to 36,9 mg N dm3. In drainage effluents, derived from different drainage section, relation N-NO3:N didn't show significant differences and was in the range 75-88%, despite the fact that this water differed significantly of total and nitrate nitrogen content. The increase of average concen-tration of total nitrogen in surface water for both research objects was cause by outflowing drainage effluents that were reached in nitrogen compounds. In drain-age water in summer period showed smaller relation N-NO3:N, what should be explain by intensive absorbing this ion by plants in vegetation period. Regardless of the analyzed period, there was found higher proportion of nitrate in water below research object. Only in case of lowland object these differences were significant for significant level p=0,05. The more fluctuation of relation N-NO3 conducive smaller participation of nitrate nitrogen in total ...
The aim of the study was to determine the effectiveness of the removal of nitrogen compounds in two domestic sewage treatment plants operate based on activated sludge technology. In addition, the effect of sewage temperature in the bioreactors analyzed the effectiveness of the elimination rate. Also analyzed the treatment Turbojet EP-2 with a capacity designed from 1.2 to 1.8 m3•d-1, and treatment Turbojet EP-4 with a capacity of 3.5÷5.0 designed m3•d-1. During the study period the two objects were hydraulically underloaded. Based on studies conducted in 2008-2010 found that the average concentration of total nitrogen in raw sewage were 82.6 mgNog•dm-3 in the treatment plant Turbojet EP-2 and 102.0 mgNog•dm-3 in the treatment Turbojet EP-4, the mean concentration of total nitrogen in treated wastewater were 30.2 mgNog•dm-3 in the treatment Turbojet EP-2 and 65.5 mgNog•dm-3 in the treatment Turbojet EP-4. During the study found large fluctuations in the concentrations of total nitrogen in treated wastewater, which ranged from 12.2 to 77.1 mgNog•dm-3 in the treatment Turbojet EP-2 and from 15.3 to 130.7 mgNog•dm-3 in the treatment Turbojet EP-4. This demonstrates the instability occurring processes of nitrification and denitrification. High impact on the percentage of disposal process was nitrogen temperature treatment ...
