Wyniki wyszukiwania - BazTech

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Effect of Fuel Combustion Products on Carbon Dioxide Uptake Dynamics of Chlorophyll Synthesizing Microalgae

Dyachok Vasyl Volodymyrovych, Mandryk Solomiya, Katysheva Victiria, Huhlych Serhiy

Journal of Ecological Engineering

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2019

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Vol. 20, nr 6

18--24

EN

The research on the effect of sulfur oxides (SO2), nitrogen oxides (NxOy) and phosphorus oxides (P2O5) on carbon dioxide (CO2) uptake dynamics of chlorophyll synthesizing microalgae was conducted. The analytic dependences of microalgae growth rates under their CO2 uptake, SO2, NxOy and P2O5 concentrations were obtained. Mathematical models enabling to predict the maximum values of SO2, NxOy and P2O5 oxides concentrations without inhibiting the CO2 uptake dynamics of chlorophyll synthesizing microalgae were built based on the obtained experimental research results.

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Biodegradation of polymeric materials : generalized kinetic data

Zaikov G. E., Gumargalieva K. Z., Kozlowski R., Kubica S.

Przetwórstwo Tworzyw

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2010

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[R.] 16, nr 3

120-127

EN

The information about generalized kinetic data which can describe biodegradation of polymeric materials (kinetics of biomass growth and methods of investigation of its formal mechanism of biodegradation, microorganism adhesion) presents in this paper.

PL

W artykule zawarto informację dotyczącą ogólnych danych kinetycznych, które mogą opisywać biodegradację materiałów polimerowych (kinetyka wzrostu biomasy oraz badania mechanizmu biodegradacji, adhezja mikroorganizmów).

3

Organics (COD) removal in dependence on loading of volatile fatty acids (VFA)

Bernat K., Wojnowska-Baryła I., Dobrzyńska A.

Archives of Environmental Protection

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2010

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Vol. 36, no. 4

93-105

EN

The aim of the study was to estimate the influence of volatile fatty acids (VFA) loading on the contribution of the biomass growth, cell respiration, denitrification and poly-β-hydroxybutyrate (PHB) accumulation involved in COD removal by activated sludge. Kinetics of PHB production, PHB and COD consumption were determined. Experimental series were carried out in sequencing batch reactor. The amount of air entering SBR was maintained at the stable set-point of 2 mg O_2/L, oxygen depletion phase occurred in initial hours of the reaction time. SBR was fed with the mixture of municipal wastewater and supernatant from the digesters. Feast period of the external organic substrate availability (f_1) and famine period of little organics availability (f_2) were determined. With VFA loading (rVFA) increase from 0.029 to 0.052 g VFA/g VSS•d in the feast period, the effectiveness of COD removal depended on the use of organics for denitrification and internal PHB storage. PHB content in activated sludge increased from 0.2 to 0.35 Cmol/Cmol. In f1 biomass growth and cell respiration in COD removal decreased from 21 to 14% and from 12 to 5%, respectively. In the famine period the remaining organics were removed due to biomass growth and cell respiration, denitrification and internal PHB storage was not observed.

PL

W pracy określono udział usuwania związków organicznych (ChZT) ze ścieków w procesach przyrostu biomasy, oddychania komórkowego, denitryfikacji oraz syntezy kwasu poli-β-hydroksymasłowego (PHB) w zależności od obciążenia osadu czynnego ładunkiem lotnych kwasów tłuszczowych w ściekach. Ponadto przeanalizowano kinetykę magazynowania oraz degradacji kwasu poli-b-hydroksymasłowego. Eksperyment prowadzono w reaktorze sekwencyjnym SBR. Ilość powietrza doprowadzanego do reaktora była automatycznie ustawiona na poziomie 2 mg O_2/L, w początkowych godzinach fazy reakcji notowano fazę wyczerpywania tlenu w reaktorze. SBR był zasilany ściekami komunalnymi z udziałem wód nadosadowych z komór fermentacyjnych.