Anaerobic Codigestion of Food Waste and Polylactic Acid: Effect of Pretreatment on Methane Yield and Solid Reduction
Food waste and biopolymers, plastics derived from plants, are unexploited sources of energy when discarded in landfills without energy recovery. In addition, polylactic acid (PLA) and food waste have complimentary characteristics for anaerobic digestion; both are organic and degrade under anaerobic...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/4715904 |
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| author | Shakira R. Hobbs Prathap Parameswaran Barbara Astmann Jay P. Devkota Amy E. Landis |
| author_facet | Shakira R. Hobbs Prathap Parameswaran Barbara Astmann Jay P. Devkota Amy E. Landis |
| author_sort | Shakira R. Hobbs |
| collection | DOAJ |
| description | Food waste and biopolymers, plastics derived from plants, are unexploited sources of energy when discarded in landfills without energy recovery. In addition, polylactic acid (PLA) and food waste have complimentary characteristics for anaerobic digestion; both are organic and degrade under anaerobic conditions. Lab-scale reactors were set up to quantify the solubilization of pretreated amorphous and crystalline PLA. Biochemical methane potential (BMP) assays were performed to quantify CH4 production from both treated and untreated PLA in the presence of food waste and anaerobic digested sludge. Amorphous and crystalline PLA reached near-complete solubilization at 97% and 99%, respectively, when alkaline pretreatment was applied. The PLA that received alkaline treatment produced the most of CH4 throughout the run time of 70 days. The PLA without treatment resulted in 54% weight reduction after anaerobic digestion. Results from this study show that alkaline pretreatment has the greatest solid reduction of PLA and maximum production of CH4 when combined with food waste and anaerobic digested sludge. |
| format | Article |
| id | doaj-art-9e1e91ad4ada4b2a8bbe804015faee02 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-9e1e91ad4ada4b2a8bbe804015faee022025-02-03T05:51:19ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422019-01-01201910.1155/2019/47159044715904Anaerobic Codigestion of Food Waste and Polylactic Acid: Effect of Pretreatment on Methane Yield and Solid ReductionShakira R. Hobbs0Prathap Parameswaran1Barbara Astmann2Jay P. Devkota3Amy E. Landis4Department of Civil Engineering, University of Kentucky, Lexington, KY, USADepartment of Civil Engineering, Kansas State University, Manhattan, KS, USADepartment of Civil Engineering, University of Kentucky, Lexington, KY, USASustainable Energy & Environmental Systems Department, Lawrence Berkeley National Laboratory, Berkeley, CA, USADepartment of Civil and Environmental Engineering, Colorado School of Mines, Golden, CO, USAFood waste and biopolymers, plastics derived from plants, are unexploited sources of energy when discarded in landfills without energy recovery. In addition, polylactic acid (PLA) and food waste have complimentary characteristics for anaerobic digestion; both are organic and degrade under anaerobic conditions. Lab-scale reactors were set up to quantify the solubilization of pretreated amorphous and crystalline PLA. Biochemical methane potential (BMP) assays were performed to quantify CH4 production from both treated and untreated PLA in the presence of food waste and anaerobic digested sludge. Amorphous and crystalline PLA reached near-complete solubilization at 97% and 99%, respectively, when alkaline pretreatment was applied. The PLA that received alkaline treatment produced the most of CH4 throughout the run time of 70 days. The PLA without treatment resulted in 54% weight reduction after anaerobic digestion. Results from this study show that alkaline pretreatment has the greatest solid reduction of PLA and maximum production of CH4 when combined with food waste and anaerobic digested sludge.http://dx.doi.org/10.1155/2019/4715904 |
| spellingShingle | Shakira R. Hobbs Prathap Parameswaran Barbara Astmann Jay P. Devkota Amy E. Landis Anaerobic Codigestion of Food Waste and Polylactic Acid: Effect of Pretreatment on Methane Yield and Solid Reduction Advances in Materials Science and Engineering |
| title | Anaerobic Codigestion of Food Waste and Polylactic Acid: Effect of Pretreatment on Methane Yield and Solid Reduction |
| title_full | Anaerobic Codigestion of Food Waste and Polylactic Acid: Effect of Pretreatment on Methane Yield and Solid Reduction |
| title_fullStr | Anaerobic Codigestion of Food Waste and Polylactic Acid: Effect of Pretreatment on Methane Yield and Solid Reduction |
| title_full_unstemmed | Anaerobic Codigestion of Food Waste and Polylactic Acid: Effect of Pretreatment on Methane Yield and Solid Reduction |
| title_short | Anaerobic Codigestion of Food Waste and Polylactic Acid: Effect of Pretreatment on Methane Yield and Solid Reduction |
| title_sort | anaerobic codigestion of food waste and polylactic acid effect of pretreatment on methane yield and solid reduction |
| url | http://dx.doi.org/10.1155/2019/4715904 |
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