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001-es BibID:BIBFORM094689
035-os BibID:(Scopus)85108577674
Első szerző:Magyar Tamás (környezetgazdálkodás)
Cím:Characterization of the biodegradation of synthetic and organic wastewater in an anaerobic tank reactor using microalgae / Tamás Magyar, Felipe Werle Vogel, Florence Tóth, Attila Nagy, János Tamás, Péter Tamás Nagy
Dátum:2021
ISSN:2062-0810 2063-4269
Megjegyzések:The anaerobic digestion is a well-known method in waste management of biodegradable wastes to transform waste to energy. Proper digestion requires optimal fermentation conditions to improve the quality and yield of biogas. The objective of this study was to characterize the biodegradation process of synthetic and organic wastewater. Microalgae (Chlorella vulgaris) were utilized as a bioindicator for anaerobic digestion and monitoring of the fermentation process. Besides bioindication, the viability of the microalgae and the chlorophyll concentration were also assessed in such fermentation processes, since microalgae can be a potential source for biofuel production and a plant nutrient. The biodegradation process was studied for a month in an anaerobic tank reactor. The fermentation processes and lengths of the fermentation stages were successfully monitored and separately identified based on the pH and gas development. Furthermore, the amount and dynamics of the biogas yield also revealed that the fermentation process was about 510 hours in both cases. In contrast, increased temperature in thermophilic range (45?C) accelerates the degradation processes and resulted in shorter hydrolysis (60 hours), acetogenesis (24 hours) and longer methanogenesis (81 hours) stages, where higher biogas yield was also achieved (59.3%). During the process, the concentration of nutrients showed logarithmical tendencies and COD showed power tendency in time. The extent and the direction of the changes were in correspondence with microalgae activity. In thermophilic circumstances, living microalgae biomass dropped significantly without recovery therefore such an environment is not a viable option for microalgae growth. Moreover, dead microalgae biomass seems to act as a substrate for fermentation slightly increasing the concentration of some nutrients in the wastewater.
Tárgyszavak:Műszaki tudományok Agrárműszaki tudományok idegen nyelvű folyóiratközlemény hazai lapban
folyóiratcikk
anaerobic tank reactor
degradation stages
synthetic and organic wastewater
microalgae
nutrients
biogas
Megjelenés:International Review of Applied Sciences and Engineering. - 12 : 2 (2021), p. 166-175. -
További szerzők:Werle Vogel, Felipe Tóth Florence (1973-) (biológus, molekuláris- és sejtbiológia) Nagy Attila (1982-) (környezetgazdálkodási agrármérnök) Tamás János (1959-) (környezetgazdálkodási agrármérnök) Nagy Péter Tamás (1970-) (vegyész)
Pályázati támogatás:ED_18-1-2019-0028
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2.

001-es BibID:BIBFORM094513
Első szerző:Werle Vogel, Felipe
Cím:Biodegradation assessment of agricultural wastewater in an anaerobic tank reactor using microalgae / Werle Vogel Felipe, Nagy Péter Tamás, Tóth Florence, Tamás János, Magyar Tamás
Dátum:2021
Megjegyzések:The anaerobic digestion is a well-known method in the waste management field used to transform biodegradable waste to energy. Proper digestion requires optimal fermentation conditions to improve the quality and yield of biogas.The objective of this study was to characterize the biodegradation processes of organic wastewater. Microalgae (Chlorella vulgaris) was utilized as a bioindicator for anaerobic digestion and monitoring of the fermentation process. Besides bioindication, the viability of the microalgae and the chlorophyll concentration were also assessed during the fermentation process, since microalgae can be a potential source for biofuel production and nutrient generation for plants.The biodegradation process was studied for one month in an anaerobic tank reactor. The fermentation process and the lengths of the fermentation stages were successfully monitored and separately identified based on the pH and gas development. Furthermore, the amount and dynamics of the biogas yield also revealed that the fermentation process was about 510 hours. The process temperature was set up to the thermophilic range (45?C)resulting in a hydrolysis, acidogenesis, acetogenesis and methanogenesis phase of 24, 22, 295, and 170 hours respectively. In addition, a biogas yield of 1.92 dl was achieved by the end of the methanogenesis phase.During the process, the concentration ofnutrients showed logarithmical tendencies and COD showed power tendency in time. The extent and the direction of the changes were in correspondence with the microalgae activity. In thermophilic circumstances, living microalgae biomass dropped significantly without recovery therefore such an environment is not a viable option for microalgae growth. Moreover, dead microalgae biomass seems to act as a substrate for fermentation slightly increasing the concentration of some nutrients in the wastewater.
Tárgyszavak:Műszaki tudományok Agrárműszaki tudományok előadáskivonat
könyvrészlet
anaerobic digestion
organic wastewater
microalgae
biogas
Megjelenés:International Symposium on Environment, Health and Safety (ISEHS) 2021: Book of Abstracts. - p. 9
További szerzők:Nagy Péter Tamás (1970-) (vegyész) Tóth Florence (1973-) (biológus, molekuláris- és sejtbiológia) Tamás János (1959-) (környezetgazdálkodási agrármérnök) Magyar Tamás (1987-) (környezetgazdálkodás)
Pályázati támogatás:EFOP-3.6.1-16-2016-00022
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3.

001-es BibID:BIBFORM089681
Első szerző:Werle Vogel, Felipe
Cím:Experimental investigation of biodegradation of synthetic wastewater in an anaerobic tank reactor using microalgae / Felipe Werle Vogel, Péter Tamás Nagy, Florence Tóth, János Tamás, Tamás Magyar
Dátum:2020
ISSN:2066-6276 2601-5676
Megjegyzések:The objective of this study was to investigate the viability of microalgae biomass (Chlorella vulgaris) as a substrate for anaerobic digestion using synthetic wastewater as well as evaluate the biogas production improvement and the microalgae cultivation rate. The experimental procedure lasted for 700 hours, where a mixture of synthetic wastewater and microalgae were used in the BE4 anaerobic tank reactor. Based on the process parameters (pH and temperature), the degradation phases (hydrolysis, acidogenesis (fermentation acidification), acetogenesis, methanogenesis) were successfully separated from each other. A drop in pH was detected from 7 to 4.5 in the acidogenesis phase, which resulted in a delayed decrease in the total chlorophyll concentration and the microalgae activity rate. In the methanogenesis phase, the pH slightly returned to neutral and caused a relatively low biogas yield (0.15 L in total), which can be explained by the unbalanced carbon/nitrogen rate (C:N) in relation to the substrate. The increase in total chlorophyll concentration was observed by the end of the process as a result of the increasing pH. It was found, that the concentration of major chemical constituents and the COD can be described well by logarithmical curves according to the nutrient consumption of microalgae. The COD decreased from the initial value of 5077 mg?L-1 O2 to 1592 mg?L-1 O2, which refers to an intensive anaerobic degradation process.
Tárgyszavak:Műszaki tudományok Agrárműszaki tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
anaerobic degradation
wastewater
microalgae
tank reactor
water quality
biogas
Megjelenés:Natural Resources and Sustainable Development. - 10 : 2 (2020), p. 210-222. -
További szerzők:Nagy Péter Tamás (1970-) (vegyész) Tóth Florence (1973-) (biológus, molekuláris- és sejtbiológia) Tamás János (1959-) (környezetgazdálkodási agrármérnök) Magyar Tamás (1987-) (környezetgazdálkodás)
Pályázati támogatás:ED_18-1-2019-0028
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DOI
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