The Biotic and Abiotic Carbon Monoxide Formation During Aerobic Co-digestion of Dairy Cattle Manure With Green Waste and Sawdust Stegenta-Dąbrowska, Sylwia Drabczyński, Grzegorz Sobieraj, Karolina Koziel, Jacek Koziel, Jacek Białowiec, Andrzej
dc.contributor.department Food Science and Human Nutrition
dc.contributor.department Civil, Construction and Environmental Engineering
dc.contributor.department Agricultural and Biosystems Engineering
dc.contributor.department Toxicology 2019-10-29T14:47:00.000 2020-06-29T22:36:47Z 2020-06-29T22:36:47Z Tue Jan 01 00:00:00 UTC 2019 2019-10-29
dc.description.abstract <p>Carbon monoxide (CO), an air pollutant and a toxic gas to humans, can be generated during aerobic digestion of organic waste. CO is produced due to thermochemical processes, and also produced or consumed by cohorts of methanogenic, acetogenic, or sulfate-reducing bacteria. The exact mechanisms of biotic and abiotic formation of CO in aerobic digestion (particularly the effects of process temperature) are still not known. This study aimed to determine the temporal variation in CO concentrations during the aerobic digestion as a function of process temperature and activity of microorganisms. All experiments were conducted in controlled temperature reactors using homogeneous materials. The lab-scale tests with sterilized and non-sterilized mix of green waste, dairy cattle manure, sawdust (1:1:1 mass ratio) were carried out for 1 week at 10, 25, 30, 37, 40, 50, 60, 70°C to elucidate the biotic vs. abiotic effect. Gas concentrations of CO, O2, and CO2 inside the reactor were measured every 12 h. The CO concentrations observed for up to 30°C did not exceed 100 ppm v/v. For 50 and 60°C, significantly (<em>p</em> < 0.05) higher CO concentrations, reaching almost 600 ppm v/v, were observed. The regression analyses showed in both cases (sterile and non-sterile) a statistically significant effect (<em>p</em> < 0.05) of temperature on CO concentration, confirming that the increase in temperature causes an increase in CO concentration. The remaining factors (time, O2, and CO2 content) were not statistically significant (<em>p</em> > 0.05). A new polynomial model describing the effect of temperature, O2, and CO2 concentration on CO production during aerobic digestion of organic waste was formulated. It has been found that the proposed model for sterile variant had a better fit (<em>R</em>2 = 0.86) compared with non-sterile (<em>R</em>2 = 0.71). The model predicts CO emissions and could be considered for composting process optimization. The developed model could be further developed and useful for ambient air quality and occupational exposure to CO.</p>
dc.description.comments <p>This article is published as Stegenta-Dąbrowska, Sylwia, Grzegorz Drabczyński, Karolina Sobieraj, Jacek A. Koziel, and Andrzej Białowiec. "The biotic and abiotic carbon monoxide formation during aerobic co-digestion of dairy cattle manure with green waste and sawdust." <em>Frontiers in Bioengineering and Biotechnology</em> 7 (2019): 283. DOI: <a href="" target="_blank">10.3389/fbioe.2019.00283</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/
dc.identifier.articleid 2374
dc.identifier.contextkey 15647033
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_pubs/1089
dc.language.iso en
dc.source.bitstream archive/|||Fri Jan 14 18:30:02 UTC 2022
dc.source.uri 10.3389/fbioe.2019.00283
dc.subject.disciplines Agriculture
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.disciplines Environmental Health
dc.subject.disciplines Toxicology
dc.subject.keywords CO emissions
dc.subject.keywords aerobic digestion
dc.subject.keywords biomass composting
dc.subject.keywords biowaste
dc.subject.keywords manure
dc.subject.keywords mesophilic conditions
dc.subject.keywords thermophilic conditions
dc.title The Biotic and Abiotic Carbon Monoxide Formation During Aerobic Co-digestion of Dairy Cattle Manure With Green Waste and Sawdust
dc.type article
dc.type.genre article
dspace.entity.type Publication
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