POTENTIAL OF REDUCING THERMOTOLERANT MICROORGANISMS FROM LIVESTOCK WASTEWATER THROUGH ANAEROBIC DIGESTION WITH AND WITHOUT INOCULUM
Brazil has agribusiness as one of its major economics components, representing about 21.4% of the Gross Domestic Product (GDP) in the year 2019, according to Brazilian Ministry of Agriculture, Livestock Industry and Supply report. Further, the dairy cattle herd has an important role such as economically, with a gross income amount of production around R$33 billion annually, as well as socio-environmentally, because of its great volume of livestock waste that is a source of contamination and proliferation of pathogenic microorganisms, which can be led to significant public health issues and environmental pollution. Thus, anaerobic digestion appears as an available solution for these major problems, likewise as a profitable opportunity with its byproducts - biogas and biofertilizer. There are a lot of concerns about the reintroduction of the biofertilizer in the field and one of them relates to the minimum quantity allowed of thermotolerant microbes, related to fecal contamination. In such manner, the objective of this work was to identify the potential of reduction of thermotolerant microorganisms during the process of anaerobic digestion of dairy cattle manure, in two separate treatments, with and without inoculum, utilizing information from the database gathered by the DNA extraction of these microorganisms. The result obtained with the inoculum treatment was a 100% reduction of the thermotolerant organisms, in a different manner the non-inoculum group encountered an 80% reduction. With the present study, the hypothesis from the inoculum’s determinant role of thermotolerant-reduction from animal manure during anaerobic digestion was corroborated.
| Main Authors: | , , , , , |
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| Format: | Digital revista |
| Language: | por |
| Published: |
Instituto de Ingeniería, Universidad Nacional Autónoma de México
2022
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| Online Access: | https://www.revistas.unam.mx/index.php/aidis/article/view/81528 |
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