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001-es BibID:BIBFORM094515
Első szerző:Damak, Mariem
Cím:Statistical evaluation of composting processes in an automated aerobic fermentation system / Mariem Damak, Nagy Péter Tamás, Tóth Florence, Magyar Tamás
Dátum:2021
Megjegyzések:The poultry industry is a very dynamic sector that is continuously growing all over the world generating an extensive amount of organic waste. Composting is a sustainable and effective method for the treatment of biodegradable wastes, therefore integrating the recycling process into the circular economy of agriculture. The quality of the mature compost can be controlled by the proper adjustment of initial parameters of the feeding material and the operational circumstances. In the present paper, the above mentioned key parameters of the composting processes were investigated seasonally (spring, summer and autumn 2019) in an aerobic fermentation system. Our results pointed out that the composting stages can be separated based on the temperature and the moisture content. The length of the fermentation stages and their proportion were determined by the chemical composition and the initial temperature of the feeding material which have a significant effect on the product quality as well. It was observed that the length of the thermophilic stage was the double in the summer period which resulted in an intensive fermentation, than in case of the spring and autumn periods, where similar temperature tendencies were measured. The maximum temperature values were formed in the thermophilic phase (approx. 55?C) in each season, where the local minimum of ammonium concentrations were also detected due to the exact location of the manure turning and chopping mechanical (MTCM) system. As a result of the examinations, the fermentation technology can be significantly shortened. Furthermore, a statistical evaluation had been performed in order to find correlation among the investigated parameters. Linear correlations were statistically proven between the temperature and moisture content (R2=0.627; p<0.05) as well as ammonium content and temperature (R2=0.758; p<0.05). Moreover, based on the obtained results of the statistical analysis, it was concluded that the homogenization of the feeding material was not adequate during the fermentation process, therefore the development of the MTCM system is strongly suggested.
Tárgyszavak:Műszaki tudományok Agrárműszaki tudományok előadáskivonat
könyvrészlet
poultry manure
composting process
key parameters
statistical evaluation
Megjelenés:International Symposium on Environment, Health and Safety (ISEHS) 2021: Book of Abstracts. - p. 11
További szerzők:Nagy Péter Tamás (1970-) (vegyész) Tóth Florence (1973-) (biológus, molekuláris- és sejtbiológia) Magyar Tamás (1987-) (környezetgazdálkodás)
Pályázati támogatás:GINOP-2.2.1-15-2017-00043
GINOP
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2.

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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3.

001-es BibID:BIBFORM082449
Első szerző:Nagy Péter Tamás (vegyész)
Cím:Evaluation of Parameters in an Aerob Industrial Fermentation System / Nagy Péter Tamás, Magyar Tamás, Gorliczay Edit, Berta Kitti, Tóth Florence, Tamás János
Dátum:2019
Megjegyzések:Meat chicken (broiler) industry continuously increasing all over the world. Due to it, the amount of waste from the chicken industry is also increasing. Therefore, more efficient conversion of chicken manure to organic fertilizer is key problem all over the world. Therefore, the aims of present study are to investigate the changes in temperature and moisture content during composting of chicken manure in a tank fermentation system and create a model to describe the biodegradation processes. In this study, Hydrus software was used for modelling the moisture and temperature distribution in the oval tank during the decomposing processes. It was found that the studied oval tank fermenter can be divided into two main parts considering to the changing of temperature and moisture level. In the first phase - after the intake - where the rate of biodegradation is high there is a heterogeneous temperature zone with decreasing moisture content. Moreover, in this stage a special temperature profile was found at the cross-sectional view of the tank. The second phase was more homogenous both in temperature and moisture content. This stage is the weak fermentation part of the technology results an elongated post fermentation section. It was established, that the changes of temperature and moisture content along the tank fermenter are the same and there is a strong connection between them in the examined period. Our results pointed out that the initial turning and mixing results in a large temperature and moisture content drop and later there is sufficient time for composting to take place. The authors recommend that this system could be used as an efficient treatment for chicken manure materials to decompose and get a valuable base organic fertilizer.
Tárgyszavak:Műszaki tudományok Agrárműszaki tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
chicken manure
fermentation
decompose
temperature and moisture model
Megjelenés:Natural Resources and Sustainable Development. - 9 : 2 (2019), p. 221-232. -
További szerzők:Magyar Tamás (1987-) (környezetgazdálkodás) Gorliczay Edit (1991-) (környezetgazdálkodási agrármérnök) Berta Kitti Tóth Florence (1973-) (biológus, molekuláris- és sejtbiológia) Tamás János (1959-) (környezetgazdálkodási agrármérnök)
Pályázati támogatás:GINOP-2.2.1-15-2017-00043
GINOP
NKFIH-1150-6/2019
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4.

001-es BibID:BIBFORM118657
035-os BibID:(cikkazonosító)172
Első szerző:Tóth Florence (biológus, molekuláris- és sejtbiológia)
Cím:Improving the Nutrient Management of an Apple Orchard by Using Organic-Based Composites Derived from Agricultural Waste / Florence Alexandra Tóth, Tamás Magyar, János Tamás, Péter Tamás Nagy
Dátum:2024
ISSN:2311-7524
Megjegyzések:Extreme weather and the declining organic matter content of soils cause serious sustainability problems in agriculture. Therefore, soil conditioner composites (chicken manure, bentonite and super absorbent polymer) were developed and tested in an integrated apple orchard characterized by poor nutrient and water management to study their effects on soil, leaf and fruit attributes. Composites with higher doses of additives increased soil organic carbon by 4?9 g/kg, and organic nitrogen by 1.8?2.8 g/kg compared to the control (p < 0.05). Similarly, soil nitrate content steadily increased from 8?10 mg/kg to 30?38 mg/kg by composites. Composites effectively elevated leaf N, K, Ca, and Mg while not affecting the leaf P (p < 0.05). Treatments significantly enhanced the yields by 14?63% on average compared to the control. Treatments with bentonite improved the fruit weight by 2% and 24% compared to the chicken manure. On average, composite treatments increased the titratable acidity of fruits by 26?43% compared to the control and 0.5?10% compared to the treatment containing solely chicken manure. Overall, the developed organic-based composites are able to cope with changing circumstances that could help mitigate the negative effects of climate change, especially in arid areas, thus contributing to sustainable nutrient management.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
apple
organic manure composites
nutrient management
agriculture sustainability
Megjelenés:Horticulturae. - 10 : 2 (2024), p. 1-14. -
További szerzők:Magyar Tamás (1987-) (környezetgazdálkodás) Tamás János (1959-) (környezetgazdálkodási agrármérnök) Nagy Péter Tamás (1970-) (vegyész)
Pályázati támogatás:GINOP-2.2.1-15-2017-00043
GINOP
RRF-2.3.1-21-2022-00008
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5.

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
EFOP
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6.

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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