Experimental research of efficiency of semi-continuous and periodic biogas production processes by using chicken manure bioloadings
© 2019 Water Environment Federation.
Veröffentlicht in: | Water environment research : a research publication of the Water Environment Federation. - 1998. - 92(2020), 5 vom: 28. Mai, Seite 722-730 |
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Format: | Online-Aufsatz |
Sprache: | English |
Veröffentlicht: |
2020
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Zugriff auf das übergeordnete Werk: | Water environment research : a research publication of the Water Environment Federation |
Schlagworte: | Journal Article biodegradation biological treatment biosolids sludge wastewater treatment Biofuels Manure Methane OP0UW79H66 |
Zusammenfassung: | © 2019 Water Environment Federation. Semi-continuous and periodic biogas production processes were investigated. Dry chicken manure containing 40.0 ± 0.5% volatile solids (VS) was used for the production of bioloading. Semi-continuous operation bioreactor and periodic bioreactor were used to implement research. Bioloading was additionally supplemented with newly prepared parts by removing 10% of decomposed mass and by adding the same amount of preheated mass every 7 days (semi-continuous process). The process was periodic when the mass was completely decomposed (after 45 days of the experiment) and fully removed (bioreactor was loaded with a new portion of raw material to 100% of the working volume again). Total duration of both experiments was 90 days. The results show that biogas production by semi-continuous process is more effective than periodic process due to higher total biogas yield (up to 39.7%) and higher methane yield (up to 33.5%). The maximum concentration of CH4 was determined during the periodic biogas production process, but the difference was only up to 2.1% (68.9% and 66.8%, respectively). Since the produced biogas had quite high average CO2 and H2 S concentrations (<40.0% and 2.1 g/m3 , respectively), it is recommended to use filter-adsorbers or biofilters. According to the results, semi-continuous type bioreactor is more effective than periodic. PRACTITIONER POINTS: Maximum CH4 concentration in biogas, produced during periodic process, is 2.1% higher than during the semi-continuous process. Average CH4 concentration in biogas, produced during periodic and semi-continuous process, reaches 52.7% and 53.0%, respectively. Biogas and methane yield (during periodic process) is 39.7% and 33.5% lower than during the semi-continuous process. CH4 concentration decreases (after supplement) about 6.0%-7.0% (during the semi-continuous process), but increases to the next cyclic bioloading supplement. Semi-continuous biogas production process is more efficient than periodic |
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Beschreibung: | Date Completed 29.04.2020 Date Revised 29.04.2020 published: Print-Electronic Citation Status MEDLINE |
ISSN: | 1554-7531 |
DOI: | 10.1002/wer.1266 |