Off-campus UNL users: To download campus access dissertations, please use the following link to log into our proxy server with your NU ID and password. When you are done browsing please remember to return to this page and log out.
Non-UNL users: Please talk to your librarian about requesting this dissertation through interlibrary loan.
A feasibility study of a two-stage renewable energy harvester using rapid waste bio-degradation technologies
Waste-based biomass energy using bio-degradation technologies is a critical solution for both energy harvesting and biomass waste recycling. It has no region restriction and can potentially supply affordable energy for human development. It is an environmentally- and ecologically- friendly renewable energy technology minimizing environmental effects, conserving landfill space, and delivering bio-fuels and organic fertilizers. Primary and secondary costs are low and can be further reduced if the bio-degradation rate can be raised. This study proposes an innovative, two-step renewable energy harvester using rapid waste bio-degradation technologies. The renewable energy harvester has two stages. Stage 1 is a fast biomass waste aerobic degradation system for generating bio-heat energy and effectively pretreating biomass feedstock to readily anaerobically biodegradable products. Stage 2 is a fast biomass waste anaerobic degradation system using the residuals from stage 1 for rapidly producing biogas energy and fertilizers. Laboratory feasibility testing shows that: 1) stage 1 can obtain a sustainable heat recovery rate of 15.0-18.2 W/kg and about 50-90% of energy can be reclaimed in about 4-6 days, 2) stage 2 can obtain an optimal 1.6-1.8 L of biogas production per L of wet biomass waste every day; 25-35% of energy contained in the aerobically pretreated wet biomass mixture can be recovered in 8-12 days. In total, with the combination of fast aerobic and anaerobic bio-degradation processes, the majority of biomass energy can be reclaimed in around two weeks. It is 5-10 times faster than that of traditional bio-degradation technologies. Wide use of this renewable energy harvester with rapid waste bio-degradation technologies for society can realize a number of benefits, such as producing renewable bio-heat and biogas energy for human life and development uses, saving limited, non-renewable fossil fuels, constantly delivering healthy bio-fertilizers, reducing greenhouse gas emissions, saving useable land, and protecting water and air quality.
Alternative Energy|Mechanical engineering|Environmental engineering
Yu, Daihong, "A feasibility study of a two-stage renewable energy harvester using rapid waste bio-degradation technologies" (2012). ETD collection for University of Nebraska - Lincoln. AAI3546820.