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Wyświetlanie 1-3 z 3
Tytuł:
Wpływ ścieków oczyszczonych odprowadzanych z Zakładu Przemysłu Mięsnego na jakość wody rzeki Szkwa
The Impact of Treated Wastewater Discharge from MPP on the Quality of Water in a Collection Reservoir on the Szkwa River
Autorzy:
Wiater, J.
Rynkiewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/1818031.pdf
Data publikacji:
2016
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
oczyszczanie ścieków
przetwórstwo mięsa
związki biogenne
samooczyszczanie
wastewater treatment
meat processing
nutrients
self-purification
Opis:
The aim of the study was to analyze impact of treated wastewater discharged from the MPP on the receiver water quality, which constituted a drainage ditch. In addition, carried out studies were related to verification of water self-purification degree at the 15-km ditch section. The direct receiver of discharged treated domestic and industrial wastewater, rinsing waters form water treatment plant, precipitation and snowmelt waters discharged from facility area is specific drainage ditch that flows into the channel, which is the primary drainage ditch.The final receiver of discharged sewage and water, along the route from outlet and further drainage ditches system, is the river Szkwa. In order to determine fluctuations in water composition and its physico-chemical parameters as well as self-purification degree in drainage ditch and in drainage channel following indications were made: indicators of oxygen (COD, dissolved oxygen), nutrients (total nitrogen, total phosphorus). Samples were collected 3 times in a month, for 10 months period from November 2013 to August 2014. The monitoring of water from the receivers was implemented in six measuring points: one before inflow from sewage treatment facility, four points were deployed at ditch and canal, while the last point was located before the discharge to river. The obtained results showed that wastewater discharged from MPP increased the values of COD, nitrogen, phosphorus and decreased dissolved oxygen concentration in water from the outlet of facility specific drainage to ditch inlet drainage canal. On the basis of these indicators, self- purification of water was observed in watercourse on the canal mouth to river Szkwa. Water at the mouth of the River, was qualified to the first class of purity on the basis of dissolved oxygen, total nitrogen, pH and temperature value. Water quality was deteriorated by COD and phosphorus concentration. The concentration of this nutrient comparing to winter and spring seasons was the lowest in summer. Self-purification process was probably impacted by water temperature and correlated with larger absorption of phosphorus by microorganisms present in water as well as by plants in increased vegetation period. Plants growing at the edges were accumulating large amount of nitrogen and phosphorus compounds which resulted in water quality improvement in summer season.
Źródło:
Rocznik Ochrona Środowiska; 2016, Tom 18, cz. 2; 838-849
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Usuwanie fosforanów z wykorzystaniem osadów potechnologicznych pochodzących ze stacji uzdatniania wody
Removal of Phosphates with Post-technological Sludge from Water Treatment Plant
Autorzy:
Totczyk, G.
Klugiewicz, I.
Pasela, R.
Górski, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/1818613.pdf
Data publikacji:
2015
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
osady z uzdatniania wody
osady pokoagulacyjne zawierające glin
defosfatacja
TZB
oczyszczalnia ścieków
water processing sludge
alumina water processing sludge
dephosphatation
RBC
sewage treatment plant
Opis:
With the treatment of water, especially surface waters, there is produced a high amount of sewage and sludge. They make up a serious ecology problem that due to a high volume and the content of sludge of iron or aluminium oxide-hydroxide or, pollution which occur in the intaken water (mineral and organic substances, algae, protozoa and bacteria) as well as the chemicals added. The environmental protection requires limiting materials as well as it makes you search for effective waste management problem-solving methods. The waste generated at present during water treatment most often undergo dehydration and drying and then they are deposited at the landfill site. The currently binding environmental protection law makes you look for the possibilities of the use of sludge as recycled materials, e.g. in brick factories, cement factories or with sewage treatment. Sludge containing aluminium or iron can be used e.g. in the process of municipal sewage treatment. The application of sludge containing aluminium for dephosphatation has the advantage of protecting the system from secondary release of precipitated phosphates in the environment deprived of dissolved oxygen. The possibilities of sludge application to remove phosphates differ, depend not only on the sludge characteristics but also on the sewage treatment process. The article demonstrates the results of research into using sludge derived from water treatment station in Lubicz to remove phosphates from sewage. At present the sludge after sedimentation and mechanical dehydration with the filtration press finally reaches the municipal landfill site. The sludge, applied for research, concentrated in settling vessels, is a mixture of post-coagulation sludge and washings from anthracite-sand and carbon filters. Its hydration accounting for 98,7% shows a high colour, above 80 mg Pt/dm3, it contains about 2,6 g/dm3 of aluminium as well as organic compounds expressed with BOD5 value equal 170 mg O2/dm3. The sludge shows a high COD of 3990 mg O2/dm3, and organic substance – for 31,6% of dry weight. The study of effectiveness of the removal of phosphates was made with the vessel test method. The sludge was dispensed at a changing volume from 0,5 to 100 cm3 per 1 dm3 of prepared water and then sewage. Both in water and in sewage there was recorded a 90% removal of phosphates by applying 80 cm3 of sludge per 1 dm3 of the sample. Additionally there was investigated the effect of dispensed sludge on the effectiveness of sewage treatment with the model of the treatment plant with rotating biological contactors. Applying the rate of 40 cm3 of sludge per 1 dm3 produced 96,0% elimination of COD, 97,7% removal of organic compounds characterised with the values of COD and BOD5 as well as 100% removal of phosphates. Finally it was found that it is possible to use the sludge to remove phosphates from sludge. During dephosphatation there was reported no use-up of the natural alkalinity of sewage. Sludge dispensing did not result in a decrease in the effectiveness of sewage treatment with the method of rotating biological contactors. The research is preliminary in nature and it needs to be continued.
Źródło:
Rocznik Ochrona Środowiska; 2015, Tom 17, cz. 2; 1660-1673
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Podczyszczanie ścieków organicznych metodą koagulacji siarczanem glinu
Pre-treatment of Organic Wastewater by Coagulation with Aluminium Sulphate
Autorzy:
Kościelnik, B.
Kowalska, A.
Powiązania:
https://bibliotekanauki.pl/articles/1813867.pdf
Data publikacji:
2017
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
podczyszczanie ścieków organicznych
kleje organiczne
przetwórstwo drewna
oczyszczanie ścieków
koagulacja
siarczan glinu
organic sewage sludge
organic adhesives
wood processing
sewage treatment
coagulation
aluminum sulphate
Opis:
W pracy przedstawiono wyniki badań laboratoryjnych jednego węzła układu technologicznego podczyszczania ścieków przemysłowych, których dominującym składnikiem były resztki kleju oraz utwardzacza. Badania dotyczyły koagulacji siarczanem glinu Al2(SO4)3 i sedymentacji grawitacyjnej. Ponadto, oceniono wpływ dawki koagulanta, czasu sedymentacji oraz stężenia początkowego zanieczyszczeń na efektywność procesu. Zastosowanie koagulacji siarczanem glinu umożliwiło zmniejszenie o około 80% stężenia substancji organicznych trudno rozkładalnych wyrażonych jako ChZT oraz o 75% stężenia węgla organicznego. Jako optymalne warunki procesu przyjęto dawkę Al2(SO4)3 wynoszącą 0,6 g/dm3 oraz czas sedymentacji ts 2 godziny. Wartości wskaźników zanieczyszczeń w wodzie nadosadowej po koagulacji zależały ściśle od stężenia początkowego w ściekach, przy czym zależność ta (spadek) była liniowa. Zaproponowano, aby ścieki po koagulacji i sedymentacji grawitacyjnej były doczyszczane w kolejnych węzłach, tj. w procesie filtracji grawitacyjnej oraz sorpcji. Na podstawie uzyskanych wyników badań wyznaczono, stosując metodę punktu centralnego, równania analityczno-empiryczne opisujące wpływ poszczególnych parametrów niezależnych na wartości parametrów wynikowych.
This paper presents results of laboratory investigations on one node of proposed technological setup for pre-treatment of industrial wastewater, which contain mainly residual glue and hardener. The investigations concern coagulation process with application of Al2(SO4)3 and sedimentation process. Authors estimated influence of coagulant dose, sedimentation time and initial concentration of contaminants on process effectiveness. Applied process of coagulation with Al2(SO4)3 reduces concentration of organic substances hardy digestible (COD) almost 80% and 75% of organic carbon . The investigations allowed to determine optimal values of process parameters: Al2(SO4)3 dose – 0.6 g/dm3, sedimentation time – 2 hours. The values of contamination parameters in wastewater after sedimentation depended strictly on their concentration before process, and this dependence (decrease) was linear. Pre-treatment of wastewater containing glue using coagulation Al2(SO4)3 allowed to decrease concentrations of all contamination parameters, which were investigated in this work. However, when compared with requirements for wastewater inflowing to sewage system, wastewater after coagulation should undergo next processes proposed in technological setup, including filtration ad sorption. On the basis of investigation results, analytical and empirical equations, which describe influence of individual independent parameters on resulting parameters, were determined using method of central point.
Źródło:
Rocznik Ochrona Środowiska; 2017, Tom 19; 557-571
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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