ANAEROBIC BIODEGRADATION OF A BIODEGRADABLE MATERIAL UNDER ANAEROBIC - THERMOPHILIC DIGESTION
This paper dertermined the anaerobic biodegradation of a polymer obtained by extrusion process of native cassava starch, polylactic acid and polycaprolactone. Initially a thermophilic - methanogenic inoculum was prepared from urban solid waste. The gas final methane concentration and medium’s pH rea...
| Main Authors: | , |
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| Format: | Article |
| Language: | Spanish |
| Published: |
Universidad del Cauca
2014-12-01
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| Series: | Biotecnología en el Sector Agropecuario y Agroindustrial |
| Subjects: | |
| Online Access: | http://revistabiotecnologia.unicauca.edu.co/revista/index.php/biotecnologia/article/view/352/302 |
| Summary: | This paper dertermined the anaerobic biodegradation of a polymer obtained by extrusion process of native cassava starch, polylactic acid and polycaprolactone. Initially a thermophilic - methanogenic inoculum was prepared from urban solid waste. The gas final methane concentration and medium’s pH reached values of 59,6% and 7,89 respectively. The assay assembly was carried out according ASTM D5511 standard. The biodegradation percent of used materials after 15 day of digestion were: 77,49%, 61,27%, 0,31% for cellulose, sample and polyethylene respectively.
Due cellulose showed biodegradation levels higher than 70% it’s
deduced that the inoculum conditions were appropriate. A biodegradation level of 61,27%, 59,35% of methane concentration in sample’s evolved gas and a medium’s finale pH of 7,71 in sample’s vessels, reveal the extruded polymer´s capacity to be anaerobically degraded under thermophilic- high solid concentration conditions.
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| ISSN: | 1692-3561 1909-9959 |