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PL
Przedstawiony został projekt modernizacji Lewobrzeżnej Oczyszczalni Ścieków w Poznaniu. Modernizacja będzie przebiegać przy zachowaniu ciągłej pracy, planowana jest również budowa oczyszczalni biologicznej.
PL
Uważa się, że ścieki przemysłowe są ściekami wysoko obciążonymi i wymagają różnorodnych metod oczyszczania. Oprócz wskaźników określających zawartość związków organicznych, w ściekach przemysłowych mogą być przekroczone wartości także innych parametrów.
PL
Uporządkowanie gospodarki ściekowej w oparciu o gruntowo-roślinne systemy oczyszczania są wskazane z punktu widzenia całkowitej ochrony wód rzeki Łazęgi.
EN
Arrangement of wastewater based on soil-plant wastewater treatment systems are desirable from the standpoint of the overall protection of waters of the Łazęga river.
EN
Sludge and vermicompost of organic origin were examined in a field experiment aimed at determining their suitability as soil fertilisers. The experiment was performed in three consecutive years (1996-98) on the sludge originating from a biological and chemical tannery sewage treatment plant and vermicompost based on the sewage sludge to which fruit tree leaves and wheat straw were added. Comparison to the farmyard manure proved that higher abundance of organic matter, nitrogen, calcium and sodium was found for both untreated tannery sludge and sludge composted by Eisenia fetida; the content of potassium was, however, much lower while phosphorus and magnesium were found in the amounts similar to farmyard manure. Contamination with heavy metals, apart from chromium, remained within the acceptable limits.
EN
The aim of the study was to determine the extent to which heavy rainfall, that occurred in 2010, affected the infiltration into the selected sewage treatment plants in the Małopolskie voivodeship. The research was conducted in four separate sewer systems, located in poviats adjacent to the city of Kraków, discharging sewage to mechanical-biological treatment plants with a capacity below 1000 m3•d-1. The amount of sewage and extraneous water in the average wet year (2008) were used as control. As a result of heavy precipitation in 2010 the sewer system A received 18 539 m3 more extraneous water than in 2008 (increase by 343%), the sewer sys-tem B - 22 822 m3 (increase by 163%), the sewer system C - 109 715 m3 (increase by 248%) and the sewer system D - 30 796 m3 (increase by 303%). Heavy precipitation in 2010 caused the increase of infiltration and inflow by 264% on average in all studied sewer systems compared to the average wet year. As the result of precipitation, whose annual total in 2010 was higher by 65% than the normal value in 2008, there was an increase in the annual share of extraneous water from 5.3 to 19.7% depending on the facility. The volume of extraneous water, which was discharged into the studied treatment plants in 2010 (the period of heavy rainfall), constituted the following share of the annual value: in the sewer system A - 41.3%, in the sewer system B - 21.2%, in the sewer system C - 14.4%, in the sewer system D - 22.9%. Assuming the average gross amount of 3 PLN paid for treatment of 1 m3 of sewage, cost of extraneous water disposal in 2010 amounted from 78 533 PLN to 552 165 PLN, depending on the facility. The results obtained in the present study suggest that eliminating or reducing infiltration and inflow into the analyzed sewer systems would allow for large financial savings associated with reducing costs both for their transport and treatment as well as for modernization of facilities to enhance their hydraulic eapacity.
7
Content available remote Removal of heavy metals from excessive activated sludge
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EN
This paper presents the laboratory scale anaerobic treatment results from an acidic autolysis of a waste activated sludge and from a desulfiirication process of this sludge, too. The sludge with high contents of the heavy metals used in the study was derived from the treatment plant at Cze_stochowa. The anaerobic first-stage treatment system includes an acid reactor or a fermentation reactor with the population of the sulfate reducing bacteria e.g. Desulfovibrio desulfuricans respectively. The second stage was carried out on the aerated reactor, which was used to heavy metals extraction during bioleaching of the sludge from the first stage with Thiobacillus ferrooxidans bacteria. The removal yield of the heavy metals are given after each stages of the sludge treatment. The organic sludge after second stage operation can be application within agriculture as its heavy metals content is very low. The liquid product on separation phosphates and the metal hydroxides as the carbon source can be used to enhance the nitrogen and phosphorus removal at the waste water treatment plants. These investigations are part of the recycling project called 1TP (integrated treatment plant) process depending on the integration of the desulfurication to waste water treatment with an activated sludge technology at a treatment plant.
PL
Wzrost liczby funkcjonujących oczyszczalni hydrofitowych wiąże się z potrzebą rozpoznania potrzeb rozwojowych nie wykorzystywanych dotąd w oczyszczaniu ścieków innych gatunków roślin wodnych, co pomoże w efektywniejszym ich doborze. Celem pracy było określenie skuteczności Hippuris vulgaris w usuwaniu N-NO3-, N-NO2-, N-NH4+ i PO43- z roztworów zanieczyszczonych surowym ściekiem komunalnym (3 kombinacje) bądź osadem ściekowym (2 kombinacje) pochodzących z komunalnej oczyszczalni ścieków. Oznaczenia stężeń badanych związków prowadzono wg Polskich Norm na początku, po 6 i 12 tygodniach. W kombinacjach ze ściekiem surowym redukcja stężenia PO43- wyniosła od 63,1 do 91,2%, a przy zastosowaniu osadu ściekowego od 17,3 do 70,4%. Dla N-NH4+ redukcja stężenia w ścieku 1 i 2 w obu terminach była równa lub bliska 100%. W przypadku użycia osadu ściekowego zmniejszenie stężenia N-NH4+ było prawie 2-krotne. Redukcję stężenia N-NO2- była w granicach 75,4-99,7% w kombinacjach z osadem ściekowym. Stu procentową redukcję stężenia N-NO3- stwierdzono w kombinacjach ze ściekiem surowym w I, a niższą w II terminie. Przy zastosowaniu osadu ściekowego redukcja ta wynosiła w I terminie 89,0% a w II terminie 68,8%. Z kolei przy zastosowaniu podwojonej dawki osadu redukcja stężenia N-NO3- była równa 94,3% i 92,6%. Przęstka pospolita pobierając jony związków N i P efektywnie uczestniczy w oczyszczaniu roztworów powstałych z zastosowanych w doświadczeniu ścieku i osadu ściekowego.
EN
The increasing number of hydrophyte sewage decontaminators makes the needs of hydrophytes never used in decontaminators very important, as it may help in their appropriate selection for more effective hydrophyte decontaminators of the future. The goal of this research was to determine the efficiency of Hippuris vugaris to eliminate N-NO3-, N-NO2-, N-NH4+ i PO43- from solutions contaminated with crude municipal sewage (3 combinations) or sewage sludge (2 combinations) from municipal sewage refinery. The concentrations of the examined compounds in solutions were measured at the beginning, after 6 and 12 weeks using the Polish Standards. In combinations witth raw sewage the reduction of concentration of PO43- was at the level of 63.1-91.2% and in combinations with sewage sludge at the level of 17.3-71.4%. The reduction of N-NH4+ concentration in sewage 1 and 2 at both terms was equal and close to 100%. When it comes to the use of sewage sludge, the reduction of N-NH4+ concentration was at the level of 50%. The reduction of N-NO2- concetration was at the level of 75.4-99.7% in combinations with sewage sludge. A 100% reduction of N-NO3- concentration was measured in combinations with raw sewage at the lst and lower at the 2nd term. The use of sewage sludge caused the reduction at the level of 89.0% at the lst and 68.8% at the 2nd term. Moreover when a double dose of sewage sludge was used the reduction of N-NO3- concentration was at the level of 94.3% and 92.6%. It was proved, that Hippuris vulgaris by effectively absorbing nitrogen and phosphorus ions plays a very important part in decontaminating the solutions of sewage and sewage sludge used in the experiment.
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