mechanical-biological sewage treatment plat type ECOLO-CHEF located in commune Spytkowice. The object with project in flow sewers 300 m3·d-1, working on method of low loud active sludge with oxygen stabilization of excessive sediment. Including of sewage-system in commune Spytkowice take 12,4 km. With sewagesystem of using 1303 residents. Actual percent sewage-system is very small and take 13,8%. The research included sewers in flow to sewage treatment plant and clean sewers out flow in river from 01.01.2005 to 31.12.2005 years. The opinion of efficiency of sewage treatment plant matter went to reduction of five choice indexes of pollution i.e. BOD5, COD, total suspension, total nitrogen and total phosphates. The research proved that in flow to sewage of values individuals parameters depart from typical values in sewage from people. Affirmed low of value total suspension (120,28 mg·dm-3) compare with value 375 mg·dm-3 and BOD5 (225,25 mgO2·dm-3) compare with value 300 mgO2·dm-3 announcing in literature. Value of individual pollution in clean sewage with the exception of total phosphates, was far less from values in legislative documentation for sewage treatment plant. In total phosphates affirmed in half analysis exceed permissible of value 2,5 mgPog·dm-3. Permissible of value was exceed on average 62,8%. Exceed of ...
The article presents evaluation of sewage treatment plant in Wadowice operation on the basis of pollutants’ reduction in the period from January 2003 to December 2005. Additional aim was analysing amount of inflowing sewage in the research period. Evaluation of operation capacity was based on reduction size of 5 chosen pollutants’ indexes: BOD5, COD, total suspended solids, general nitrogen and general phosphorus. Values of above mentioned pollutants’ indexes in treated sewage were compared to values from water-law permission given by Wadowice Starost for Wadowice Waterworks and Sewerage Utility Sp. z o. o. from 28.03.2006. Results of analyses of treated sewage composition show, that mean values of BOD5, COD, total suspended solids, general nitrogen and general phosphorus are lower than the admissible values from water-law permission. In the case of BOD5 mean value on the outflow (14,0 mgO2·dm-3) is almost 7% lower than the admissible value (15 mgO2·dm-3), COD (mean value 89,15 mgO2·dm-3) – 28,7% lower than the admissible value (125 mgO2·dm-3), total suspended solids (mean value 27,27 mg·dm-3) – 22,1% lower than the admissible value (35 mg·dm-3), general nitrogen (mean value 22,17 mgNgen·dm-3) – 26,1% lower than the admissible value (30 mgNgen·dm-3) and general phosphorus (mean value 1,26 mgPgen·dm-3) – ...
The article presents effectiveness of sewage pollutants’ reduction in Sewage Treatment Plant „KUJAWY”. Treatment plant “KUJAWY” is meant to neutralise living sewage from Nowa Huta quarter for Krakow city. Capacity of the treatment plant is 80 000 m3*d-1. The research was carried out in the period from 01.04.2006 to 31.03.2007. Results’ analysis was performed on the basis of raw and treated sewage concentration. Three pollutants’ indexes from the basic group were analysed: BOD5, CODCr and total suspended solids and two indexes from the eutrophic group: general nitrogen and general phosphorus. Basing on the results’ analysis, mean effectiveness of BOD5 reduction was defined on the level of 98,5%, CODCr – 96,0%, total suspended solids– 98,2%, general nitrogen– 73,7% and general phosphorus – 91,4%. ...
The aim of the research was defining temperature changes of sewage in sewerage system and in open biological reactor under the influence of atmospheric air temperature. The literature connected with sewage treatment doesn’t give unequivocal information regarding influence of air temperature on sewage temperature in the canalisation. Some authors claim that such a relationship doesn’t occur. The research carried out on the area of sewage treatment plant in Koszyce commune showed, that important relationship exists between mean daily atmospheric air temperature (tair) and mean daily temperature of sewage in sewerage system (tsew). This relationship may be with high accuracy (R2=0,78, p<0,001)described by a cubic polynomial equation: tsew = -0,0011·(tair)3 + 0,0232·(tair)2 + 0,3704·tair + 9,0554. In the research period, mean daily temperature of sewage in sewerage system was going under big fluctuations, from 6,35 to 17,56°C. Changes of sewage temperature in the collector during the day ranged between 0,35°C and 4,60°C. In the winter period, with mean daily air temperature under 5°C, sewage temperature in the canalisation lowered under 10°C, reaching its minimal value of 5,37°C. In biological reactor, which was built as a reinforced concrete open reservoir, mean daily sewage temperature ranged between 5,68 and 21,04°C. Whereas in the ...
The article presents effectiveness of sewage treatment in Dąbrowa Tarnowska treatment plant. The research was carried out in the period from January 2005 to September 2007. Two indexes from the basic group: BOD5, total suspended solids and from the eutrophic group: general nitrogen and general phosphorus were physicochemically analysed. Efficiency of treatment was on the low level, which concerns basic pollution indexes BOD5 and total suspended solids, as well as biogenic compounds (general nitrogen and general phosphorus). The reason for this may be bad technical state of the treatment plant, which was built in the sixties of the 20th century. The problem may be solved by building a modern sewage treatment plant, which allows to treat sewages up to the level admissible by the obliging Ordinance. ...
The paper presents the reliability of the sewage treatment plant operation for Tuchów commune. The research was carried out from January 2005 to December 2006. The following sewage pollution ratios were physico-chemically analyzed: BOD5, CODCr, total suspended solids. In order to define the proper treatment plant's operation, the reliability coefficient was calculated (RC) for each of the tested indexes. The empiric reliability was presented. The amount of transgresions of the admissible index values presented in the water-law permis-sion was described. Moreover, the efficiency of the ratios' decrease in the tested period was defined.The carried out research showed the high efficiency of the pollutants' amount decrease: BOD5 - 90,7%, CODCr - 86,6%, total suspended solids - 90,5%. The calculated Reliability Coefficients RC of the analyzed indexes amounted respectively: for BOD5 - 0,52, for CODCr - 0,31 and for total sus-pended solids 0,62. ...
The paper presents the efficiency of the sewage treatment based on the ex-ample of the sewage treatment plant for Krynica-Zdrój. The research was carried out from January 2006 to December 2007. The following sewage pollution indexes were physico-chemically tested: BOD5, CODCr, total suspended solids, general ni-trogen and general phosphorus. The reliability coefficient (RC) was calculated for each of the analyzed indexes. The amount of the transgressions of the admissible index values in relation to the water law permission was defined. Moreover, the ef-fectiveness of the indexes' decrease in the tested period was analyzed. Additionally the amount of sewage flowing into the treatment plant in each months of the tested period was presented. The carried out research showed the high efficiency of the pollutants' removal. The average reduction of the tested indexes balanced on the level of: BOD5 - 95,03%, CODCr - 90,98%, total suspended solids - 94,76%, gen-eral nitrogen - 79,79%, general phosphorus - 63,5%. ...
The aim of the research was to evaluate the pollutants' concentration in the household sewage drained from the rural or rural-urban districts located in Lesser Poland Voivodeship. The research was based on the analysis of 140 raw sewage samples taken from 34 sewerage systems in the period of 2000-2009. Val-ues of five selected pollution indexes were analyzed: BOD5, COD, total suspended solids, general nitrogen and general phosphorus. The results were compared to the amounts presented in the common literature on the sewage treatment. The research showed that the average values of the pollution indexes in the household sewage drained from the rural and urban-rural districts in Lesser Po-land Voivodeship differ from the values presented in the literature. The biggest difference was found in the case of the general nitrogen (value 48% higher) and COD (value 4,4% higher). However the average concentration of the general phosphorus, 11 mgP•dm-3, turned out to be 45,8% lower than the average value presented in the literature. The maximum values of BOD5, COD, total suspended solids and general nitrogen in the tested sewage were much higher than the maxi-mum values in the analyzed references. On the basis of the relationships between the average values ...
In the paper an analysis of sewage management in Baranów Sandomierski commune, locateg in north part of Podkarpackie province was made. The mean efficiency of waork of two sewage treatment plants, located in Baranów San-domierski and Dąbrowica was defined. It was noted, that both treatment plants eliminate pollutions satisfactorily in accordance with current regulations of law. Quality of water of Babulówka river, in section located upstream and below of sewage outflow was characterized. It shows, that quality of water was significantly improved in section located below of sewage outflow in case of BOD5, total phos-phorus and ammonia nitrogen. On the basis of municipal sewage management in the commune a few variants of improvement of sewer system were proposed. In Wola Baranowska build of sewer system with length of 15 km and two collective vegetal and pond treatment plants were taken into consideration. In case of areas with detached buildings individual sewage treatment plants were proposed. ...
The construction process begins with the formulation of an idea for the project and finishes with the final commissioning. This consists of many stages, the most important of which is the construction of the buildings for the facility. This results from the specific features of the construction project, such as its long duration, its uniqueness, the seasonality of the work, dependence on weather con-ditions, and the necessity of interfering with the environment. There are many more factors, and when we consider the construction of a treatment works plus the sewerage system itself, we must also take into account any special requirements connected with their function in the local water and sewage management system. All these factors generate the risk exposure. Such risks should be included in the initial project-costing, schedule planning, and establishing the duration of the work. Events which can occur during the building of the sewage treatment works and the sewerage system have been detailed in this paper. Such events can lead to cost overruns and the prolonging of the construction phase. The method known as expert interview was used to establish whether the pre-prepared list contained the most important sources of risk. The specialists, all with long ...
The paper presents the efficiency of the sewage treatment based on the ex-ample of the sewage treatment plant in Dobczyce. The resarch was based on the analysis of 44 raw sewage and treated sewage from January 2007 to December 2010. Values of five selected pollution indexes were analyzed: BOD5, COD, total suspended solids, general nitrogen and general phosporus. The amount of the transgressions of the admissible index values in relation to the water law permis-sion was defind. The effectiveness of the indexes' decrease In the tested period was analyzed. The carried out research showed the high efficiency of the pollutants amount decrease: BOD5 - 98,9%, COD - 97,6%, total suspended solids - 97,6%, general nitrogen - 89,4%, general phosporus - 97,6%. ...
Untreated domestic sewerage still poses a serious threat to the environment in ruralareas. The lack of simultaneous construction of water supply and sewerage systemsin rural areas contributed to the significant imbalance between water supply and sewagedischarge. Raw sewage, entering the natural receiver, cause rapid degradation oflife and contribute to the biological imbalance in the environment. Untreated sewagecan cause the deterioration of water quality in private wells and may even lead to itstotal contamination.In areas, where it is impossible to implement collective sewerage systems, there isan alternative in the form of building septic tanks or household sewage treatment plants.The development of household sewage treatment plants in Poland has been observed fordecades. There were 4000 household sewage treatment plants registered in 1998, whilein 1999 this number increased to 18054. A rapid increase was observed in subsequentyears, i.e. in 2008 there were 51,943 registered household sewage treatment plants, in2010 this number increased to about 81 thousand and in 2011 about 103 thousandtreatment plants were registered. In the near future a dramatic increase in the numberof newly built household sewage treatment plants is expected.The aim of this study was to analyze the efficiency of domestic sewage treatmentin a household sewage treatment plant with a ...
The paper presents the assessment of the operation of a sewage treatment plant in Haczów before and after its modernization. The analysis of results was conducted based on data data for the period from January 2011 to March 2015. The paper describes the process line of the studied object and the qualitative assessment of treated sewage based on three basic sewage contamination indicators: BOD5, CODCr and total suspended solids. Moreover, the amount of sewage flowing into the treatment plant over the period of four consecutive years was analyzed. The operation of the sewage treatment plant was assessed for two periods, i.e. before and after its modernization. The conducted analysis showed a significant improvement in the quality of treated sewage after the modernization of the treatment plant. After the modernization, the mean value of the BOD5 indicator in the treated sewage was 8,4 mgO2.dm-3 and was more than seven times lower than in the period prior to modernization. Similar situation was observed for CODCr as its mean value for treated sewage after the modernization was 61,7 mgO2.dm-3 while before the modernization it was 227,9 mgO2.dm-3. A significantly lower value of the mean total suspended solids concentration was also observed in treated ...
The article contains evaluation of functionality of sewage treatment plant in Jasło for multiplicity 2010 - 2014. On the basis of the results raw and cleaned sewage physico-chemical analysis, the efficiency of sewage treatment, coefficient of technological reliability, technological efficiency of sewage treatment and risk of the negative assessment of work of sewage treatment plant, were obtained, for following pollutions indicators: total suspended solids, BOD5, CODCr, total nitrogen and total phosphorus.Based on obtained results its conclude the average reduction of pollution on level below 90%. Only for total nitrogen the average reduction is lower and is on level 77%. Based on other values of indicators of reliability work of sewage treatment plant its conclude that the tested sewage treatment plant may be certified to operate in high quality and the sewage treated by this plant doesn't threaten the collector of the treated sewage. ...
The article contains analysis and evaluation of the impact of clean sewage on sewage treatment plant in Myślenice, in the period 2008 - 201,1 on the physico-chemical composition and water quality of the receiver - river Raba. The analysis conducted based on collected and statistical research: amount and composition of clean sewage and composition of the water receiver in cross-section: Stróże (above of inflow clean sewage) and Osieczany (below of inflow clean sewage). The following pollution index were tested: total suspended solids, BOD5, CODCr, total nitrogen and total phosphorus. Based on obtained results its concluded that in period 2008 - 2011 sewage treatment plant was working properly, what explain quality of clean sewage. What reflected in directly protection of receiver water against pollution. Moreover, based on the results of U Mann Whitney test, concluded that in the both cross-section, composition of the water of Raba river was similar, what explain the results of this test, which didn't show statistically significant differences between average values of concentrations analyzed indicators of pollutions. Based on obtained results its concluded that sewage treatment plant in Myślenice doesn't negatively impact on quality of the water receiver -Raba river. ...
The paper analyzes the variability of sewage inflow to a treatment plant in Dębica. For this purpose, the following basic descriptive statistics of the sewage inflow to the treatment plant were determined: mean value (Qdm), median (Mo), minimum value (Qdmin), maximum value (Qdmax), standard deviation (), coefficient of variation (Vzm), range (Ro). Histogram of a number of sewage inflows to the treatment plant for the specified observation intervals was determined. Detailed diurnal raw sewage inflows to the treatment plant in Dębica were summarized for the period of 2009-2015 compared to the limit value specified by the water-legal permit and the to the mean value. Mean diurnal sewage flow values for individual months from the period of 2009-2015 were also summarized. Mean diurnal sewage flows in individual years of the studied period, as well as mean diurnal sewage flow values in each day of the week were compared. Moreover, runoff data were obtained from the Tarnów station (the nearest rainfall station to the studied facility) and on this basis mean values of diurnal precipitation for individual months in the period of 2009-2015 were determined. Subsequently, the days of the study period were divided into 7 major groups based on the amount ...
This study was aimed to conduct an analysis of the efficiency of pollutant elimination in the Dobra treatment plant, which operates based on the SBR reactor. The object purifies domestic sewage and pre-treated industrial sewage from a slaughterhouse within the Dobra municipality. The source material for the analysis comprised the values of pollution indicators: BOD5, CODCr, total suspended solids (TTS) in raw sewage (19 samples) and treated sewage (34 samples). The results of chemical analyses were obtained in the period 2007-2014. The results were compared with the limit values imposed by the Regulation (2014). The coefficient of reliability of the treatment plant was also calculated in this study. The average efficiency of pollutant elimination in the treatment plant was: BOD5 - 98.6%, CODCr - 94.9%, total suspended solids - 97.6%. These results demonstrate that the studied facility operates flawlessly and the treatment efficiency is high. On the other hand, the reliability coefficient values indicate that the operation of this object is unstable. ...
The paper presents an analysis of sewage susceptibility to biodegradation on an example of sewage treatment plant in Wodzisław Śląski in the Śląskie province. For this purpose, dependencies between selected indices of domestic sewage pollution were applied. Descriptive statistics of the respective indices rations COD/BOD5, BOD5/TN, BOD5/TP were presented. Moreover, an analysis was conducted on the composition of raw sewage flowing into the treatment plant, pre-treated sewage and sewage leaving the studied treatment plant. The analysis was carried out on the basis of three basic indices of sewage pollution (BOD5, COD and total suspended solids) and two biogenic indices (total nitrogen and total phosphorus). Tests on the sewage composition were conducted in the years 2010-2015. Basic descriptive statistics were compiled for the values of the studied indices of sewage pollution and the obtained results were interpreted. On the basis of collected material it may be said that sewage reaching the treatment plant in Wodzisław Śląski revealed a good susceptibility to biodegradation, whereas the BOD5/TN and BOD5/TP ratios were below the optimum value. ...
