Exposure Assessment of Airborne Bacteria Emitted from Swine Manure Composting Plant
This study was performed to investigate the distribution characteristics of airborne bacteria emitted from swine manure composting plants. The types of swine manure composting plants selected for the survey in this study were as follows: screw type, rotary type, and natural dry type. Mean levels of...
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| Veröffentlicht in: | Processes 2021-08, Vol.9 (8), p.1283 |
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| description | This study was performed to investigate the distribution characteristics of airborne bacteria emitted from swine manure composting plants. The types of swine manure composting plants selected for the survey in this study were as follows: screw type, rotary type, and natural dry type. Mean levels of airborne bacteria in swine manure composting plants were 7428 (±1024) CFU m−3 for the screw type, 3246 (±1407) CFU m−3 for the rotary type, and 5232 (±1217) CFU m−3 for the natural dry type, respectively. Based on the results obtained from this study, the swine manure composting plant operated by screw type showed the highest concentration of airborne bacteria, followed by the natural dry type and rotary type. The monthly concentration of airborne bacteria was the highest in August and the lowest in November, regardless of the type of swine manure composting plant. The respirable size of airborne bacteria accounted for about 50% of the total. The ratio of respirable to the total quantity of airborne bacteria was 50%. The correlation relationships between airborne bacteria and environmental factors (temperature, relative humidity, particulate matters, and odor) were not found to be significant in the swine manure composting plants. The predominant genera of airborne bacteria identified were Micrococcus spp., Staphylococcus spp., Escherichia (E-coli) spp., Enterococcus spp., and Enterobacteriaceae spp. |
| doi_str_mv | 10.3390/pr9081283 |
| format | Article |
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The types of swine manure composting plants selected for the survey in this study were as follows: screw type, rotary type, and natural dry type. Mean levels of airborne bacteria in swine manure composting plants were 7428 (±1024) CFU m−3 for the screw type, 3246 (±1407) CFU m−3 for the rotary type, and 5232 (±1217) CFU m−3 for the natural dry type, respectively. Based on the results obtained from this study, the swine manure composting plant operated by screw type showed the highest concentration of airborne bacteria, followed by the natural dry type and rotary type. The monthly concentration of airborne bacteria was the highest in August and the lowest in November, regardless of the type of swine manure composting plant. The respirable size of airborne bacteria accounted for about 50% of the total. The ratio of respirable to the total quantity of airborne bacteria was 50%. The correlation relationships between airborne bacteria and environmental factors (temperature, relative humidity, particulate matters, and odor) were not found to be significant in the swine manure composting plants. The predominant genera of airborne bacteria identified were Micrococcus spp., Staphylococcus spp., Escherichia (E-coli) spp., Enterococcus spp., and Enterobacteriaceae spp.</description><identifier>ISSN: 2227-9717</identifier><identifier>EISSN: 2227-9717</identifier><identifier>DOI: 10.3390/pr9081283</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Airborne bacteria ; Bacteria ; Composting ; Data analysis ; Decomposition ; E coli ; Environmental factors ; Escherichia coli ; Humidity ; Livestock ; Manures ; Microorganisms ; Odors ; Recycling centers ; Relative humidity ; Swine ; Temperature ; Variance analysis</subject><ispartof>Processes, 2021-08, Vol.9 (8), p.1283</ispartof><rights>2021 by the author. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). 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The types of swine manure composting plants selected for the survey in this study were as follows: screw type, rotary type, and natural dry type. Mean levels of airborne bacteria in swine manure composting plants were 7428 (±1024) CFU m−3 for the screw type, 3246 (±1407) CFU m−3 for the rotary type, and 5232 (±1217) CFU m−3 for the natural dry type, respectively. Based on the results obtained from this study, the swine manure composting plant operated by screw type showed the highest concentration of airborne bacteria, followed by the natural dry type and rotary type. The monthly concentration of airborne bacteria was the highest in August and the lowest in November, regardless of the type of swine manure composting plant. The respirable size of airborne bacteria accounted for about 50% of the total. The ratio of respirable to the total quantity of airborne bacteria was 50%. The correlation relationships between airborne bacteria and environmental factors (temperature, relative humidity, particulate matters, and odor) were not found to be significant in the swine manure composting plants. The predominant genera of airborne bacteria identified were Micrococcus spp., Staphylococcus spp., Escherichia (E-coli) spp., Enterococcus spp., and Enterobacteriaceae spp.</description><subject>Airborne bacteria</subject><subject>Bacteria</subject><subject>Composting</subject><subject>Data analysis</subject><subject>Decomposition</subject><subject>E coli</subject><subject>Environmental factors</subject><subject>Escherichia coli</subject><subject>Humidity</subject><subject>Livestock</subject><subject>Manures</subject><subject>Microorganisms</subject><subject>Odors</subject><subject>Recycling centers</subject><subject>Relative humidity</subject><subject>Swine</subject><subject>Temperature</subject><subject>Variance 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Plant</atitle><jtitle>Processes</jtitle><date>2021-08-01</date><risdate>2021</risdate><volume>9</volume><issue>8</issue><spage>1283</spage><pages>1283-</pages><issn>2227-9717</issn><eissn>2227-9717</eissn><abstract>This study was performed to investigate the distribution characteristics of airborne bacteria emitted from swine manure composting plants. The types of swine manure composting plants selected for the survey in this study were as follows: screw type, rotary type, and natural dry type. Mean levels of airborne bacteria in swine manure composting plants were 7428 (±1024) CFU m−3 for the screw type, 3246 (±1407) CFU m−3 for the rotary type, and 5232 (±1217) CFU m−3 for the natural dry type, respectively. Based on the results obtained from this study, the swine manure composting plant operated by screw type showed the highest concentration of airborne bacteria, followed by the natural dry type and rotary type. The monthly concentration of airborne bacteria was the highest in August and the lowest in November, regardless of the type of swine manure composting plant. The respirable size of airborne bacteria accounted for about 50% of the total. The ratio of respirable to the total quantity of airborne bacteria was 50%. The correlation relationships between airborne bacteria and environmental factors (temperature, relative humidity, particulate matters, and odor) were not found to be significant in the swine manure composting plants. The predominant genera of airborne bacteria identified were Micrococcus spp., Staphylococcus spp., Escherichia (E-coli) spp., Enterococcus spp., and Enterobacteriaceae spp.</abstract><cop>Basel</cop><pub>MDPI AG</pub><doi>10.3390/pr9081283</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Airborne bacteria Bacteria Composting Data analysis Decomposition E coli Environmental factors Escherichia coli Humidity Livestock Manures Microorganisms Odors Recycling centers Relative humidity Swine Temperature Variance analysis |
| title | Exposure Assessment of Airborne Bacteria Emitted from Swine Manure Composting Plant |
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