Autor: Rodziewicz, A - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Wspomaganie denitryfikacji w czterostopniowym biologicznym złożu obrotowym
Denitrification process enhancing in four-stages rotating biological contactor
Autorzy:: Mielcarek, A.
Rodziewicz, J.
Janczukowicz, W.
Wolter, A.
Powiązania:: https://bibliotekanauki.pl/articles/399584.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: rotating biological contactor
denitrification
external organic carbon source
acetic acid
biologiczne złoże obrotowe
denitryfikacja
zewnętrzne źródło węgla organicznego
kwas octowy
Opis:: Celem badań było określenie stopnia wykorzystania substratu organicznego w procesie denitryfikacji z udziałem błony biologicznej w laboratoryjnym modelu czterostopniowego biologicznego złoża obrotowego. Zanurzenie tarcz wynosiło 40%. Jako substrat organiczny zastosowano kwas octowy, wprowadzany do czwartego (ostatniego) stopnia złoża. Obserwowano wykorzystanie substratu dla 2 i 24h. Dla krótszego czasu zanotowano usunięcie 37,9±1,8 mgN·m^-2 przy jednoczesnym wykorzystaniu 499,9±33,2 mgO₂·m^-2 związków organicznych. Wydłużenie czasu gwarantowało wyższą efektywność denitryfikacji. Stosunek wykorzystanego substratu organicznego do ilości usuniętego azotu wynosił 13:1 i 21:1 odpowiednio dla 2 i 24h.
The aim of the study was to determine the degree of an organic substrate consumption in the denitrification process involving a biofilm in four-stages laboratory scale rotating biological contactor (RBC). The discs submergence was 40% of their diameter. Acetic acid, used as external carbon source, was fed to the fourth stage of RBC. Consumption of substrate was observed for 2 and 24 hours. For a shorter period there was the removal of 37.9 ± 1.8 mgN · m^-2, while using 499,9 ± 33.2 mg O₂ · m^-2 of organic compounds. The prolongation of the experiment duration guaranteed higher efficiency of denitrification. The ratio of organic substrate used to the amount of nitrogen removed was 13: 1 and 21: 1 for 2 and 24 hours respectively.
Źródło:: Inżynieria Ekologiczna; 2016, 48; 161-165
2081-139X
2392-0629
Pojawia się w:: Inżynieria Ekologiczna
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Wpływ procesu filtracji na relację między ilością substancji organicznych i związków biogennych w ściekach mleczarskich
The influence of the filtration process on the content of organic compounds in relation to the concentration of nutrients in dairy wastewater
Autorzy:: Ostrowska, K.
Janczukowicz, W.
Rodziewicz, J.
Mielcarek, A.
Powiązania:: https://bibliotekanauki.pl/articles/1819041.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:: proces filtracji
ilość substancji
volatile fatty acids
biological phosphorus removal
sequencing batch reactors
denitrification
wastewaters
fermentation
systems
Opis:: Nowadays, high effective carbon, nitrogen and phosphorus removal based on activated sludge is the most popular method of dairy wastewater treatment. In activated sludge systems efficient nutrient compounds removal is determined by the quantity and quality of easily available forms of organic carbon. For both biological phosphorus removal and biological nitrogen removal to occur, an easily biodegradable carbon source must be present in the treating wastewater. The organic compounds used in the processes of denitrification and enhanced biological phosphorus removal (EBPR) usually are presented in treating wastewater, what is called an internal source of carbon. However, many industrial wastewater, including dairy wastewater, very often do not have sufficient amounts of carbon, in relation to the concentration of nitrate and phosphates, to ensure efficient both denitrification and biological dephosphatation processes. When biological nitrogen and phosphorus removal is limited by the availability of easily biodegradable forms of organic carbon a supplemental carbon source must be add to the wastewater, hence so-called external source of carbon should be applied to provide energy necessary for the nutrient removing bacteria to grow and perform their work. One of the most popular sources of organic carbon is acetic acid, which is one of the best available forms of carbon by denitrifying bacteria and those accumulating polyphosphates (PAO). Apart from acetic acid and acetates use is made of a number of the volatile fatty acids (VFA), including propionic acid, butyric acid, valeric acid, and such substrates as: glucose, methanol or ethanol. Since the use of chemical compounds in the form of technical products (e.g. acetic acid, citric acid) is generally expensive, cost-saving solutions are sought. According to literature data, wastewater with high COD/(N + P) ratio after acidogenic fermentation can be used as an external source of VFA in wastewater with low concentrations of easily available organic compounds treatment. The aim of this study was to determine the influence of the filtration process on the content of organic compounds (measured as COD) in relation to the concentration of nutrients (measured as the sum of TKN and TP) in process dairy wastewater, in terms of the possibility of effective VFA production. It was observed, that filtration process ensures improvement of the COD/(N + P) ratio only in wastewater from the selected sections of dairy production. The best result, if percentage increase of the COD/(N + P) ratio is considered, was obtained for the wastewater from butter production. Densification of wastewater from butter production resulted in 95% increase of the COD/(N + P) ratio without a significant increased nutrient concentration. Filtration process provided the highest COD/(N + P) ratio (219,18 mg O2/(mg N + mg P)) and reduced both nitrogen and phosphorus concentrations in the permeate from the apparatus room. The results obtained suggest, that acidogenic fermentation of wastewater from the apparatus room and butter production with high COD/(N + P) ratio can serve as an external source of VFA in biological wastewater treatment process of wastewater with low concentrations of easily available organic compounds, which ensures effective nitrogen and phosphorus removal.
Źródło:: Rocznik Ochrona Środowiska; 2013, Tom 15, cz. 2; 1411-1425
1506-218X
Pojawia się w:: Rocznik Ochrona Środowiska
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Effect of Acetic Acid on Denitrification and Dephosphatation Process Efficiencies in Sequencing Batch Biofilm Reactor
Autorzy:: Mielcarek, A.
Rodziewicz, J.
Janczukowicz, W.
Bryszewski, K.
Powiązania:: https://bibliotekanauki.pl/articles/123858.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: Sequencing Batch Biofilm Reactor
denitrification
dephosphatation
acetic acid
Opis:: This study investigates the feasibility of using an organic substrate in the form of acetic acid to enable wastewater denitrification in a Sequencing Batch Biofilm Reactor (SBBR). The impact of nitrates presence on the yield of biological dephosphatation was determined as well. The experiment included 296 cycles and was divided into 4 series differing in the load of nitrates. The N:(C and P) ratios were: 7:(140 and 7); 35:(140 and 7); 70:(140 and 7) and 140:(140 and 7). The hydraulic retention time in the reactor was 12h (6h of mixing – dissolved oxygen concentration below 0.1 and 6h of aeration – concentration of dissolved oxygen 3.0±0.8 mgO₂·dm^-3). The study demonstrated that the 30-day adaptation period (60 cycles) was sufficient for the development of a stable biofilm. The C:N ratio of 2 ensured the total nitrogen concentration in the effluent below 1 mgN·dm^-3. The mean efficiency of biological dephosphatation reached 7.0, 17.4, 18.7, and 30.3% in series 1–4, respectively. In the case of series 2 and 3, no significant differences were demonstrated in the total phosphorus concentration in the effluent. In the other series, the differences turned out to be significant.
Źródło:: Journal of Ecological Engineering; 2018, 19, 4; 176-180
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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