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Analysis of different substrates for processing into biogas

100%

Mursec B. , Vindis P. , Janzekovic M. , Brus M. , Cus F.

2009

tom Vol. 37, nr 2

652-659

Purpose: The main target is to produce as much biogas as possible with highest possible biomethane content from crops representing the principal fuel for driving the gas motors and electric generators and, consequently, production of electricity. Design/methodology/approach: The biogas production was measured by a mini digester according to the German standard DIN 38414, Part 8. It was effected in the mesophilic temperature range. The biogas production from six different energy crops and pig slurry was measured in the laboratory of the Faculty of Agriculture and Life Sciences. In six trial fields the monocultures such as maize, sorghum, amaranth, sunflower, Jerusalem artichoke and sugar beet were grown. Findings: The highest biomethane production was achieved with the sunflower substrate (283 Nl/kgVS), followed by the sorghum substrate (188 Nl/kgVS) and maize (187 Nl/kgVS). The amaranth substrate produced 225 Nl/kgVS and the Jerusalem artichoke 115 Nl/kgVS. The least amount of biomethane was produced from the sugar beet (95 Nl/kgVS). Research limitations/implications: The basic structure of the laboratory device is welded from stainless steel (inox) and is limited by the following dimensions: 2500 mm length, 1000 mm height and 350 mm width. The device consists of twelve units of fermentors ensuring four tests simultaneously with three replications and assuring high accuracy of results. Practical implications: The test fermentors serve to test the biogas production from different energy crops and other materials of organic origin. The results reached serve to plan the electricity production in the biogas production plant. Originality/value: The mini digesters simulated in laboratory the actual state from the biogas production plant. Anaerobic fermentation was introduced and the biogas to be processed into electricity was produced.

Skomputeryzowany system sterowania hodowlą bakterii aerobowych w fermentorze

84%

Trzmiel T.

tom Z. 65

79-90

W pracy przedstawiono opis budowy i działania skomputeryzowanego systemu sterowania pracą fermentora, który opracowano w Instytucie Biochemii Technicznej oraz na przykładzie biosyntezy subtilizyny przez bakterie B.subtilis IBTC-3 pokazano jego możliwości.

Construction and basis work of the Computerizing System Steering of Fermentor (SSSF), mounting in Institute of Biochemistry Technical University Łódź were described. The results of biosynthesis of subtilisin by Bacillus subtilis IBTC-3 in SSSF were also described.

Anaerobic moving bed biofilm fermenter for biogas production

48%

Szentgyörgyi E. , Nemestóthy N. , Bélafi-Bakó K.

2010

tom Vol. 36, nr 4

117-125

On of the most promising technologies in the disposal of agro-industrial organic wastes is biodegradation under anaerobic circumstances. The major, profitable product of anaerobic degradation is biogas, from the environmental aspect a renewable resource. To enhance biogas production and produce a methane-rich final product an integrated anaerobic membrane bioreactor filled with moving biofilm carriers was designed. In this study, the intensification of anaerobic fermenter was investigated by using polyvinyl-alcohol (PVA) gel beads as biofilm carriers. The solid retention time can be increased by attaching microorganisms to PVA-gel beads and as a result the efficiency of biogas production can be improved. Two laboratory-scale anaerobic fermenters were run in parallel, one with biofilm carriers and one without. The results showed that, compared to the control system, in the carrier-filled fermenter the efficiency of biogas production was enhanced by 28% as a result of the biofilm formation on the surface of the carriers. In addition, the COD concentration of the effluent was decreased by 80-88%, 10% more than in the control reactor.