Use of MRF residue as alternative fuel in cement production

摘要: Single-stream recycling has helped divert millions of metric tons waste from landfills in the U.S., where rates for municipal solid are currently over 30%. However, material recovery facilities (MRFs) that sort recycled streams do not recover 100% incoming material. Consequently, they landfill between 5% and 15% total processed as residue. This residue is primarily composed high-energy-content non-recycled plastics fiber. One possible end-of-life solution these energy-dense materials to process into Solid Recovered Fuel (SRF) can be used an alternative energy resource capable replacing or supplementing fuel resources such coal, natural gas, petroleum coke, biomass many industrial power production processes. report addresses energetic environmental benefits trade-offs converting post-consumer fiber derived MRF SRF use a cement kiln. An experimental test burn 118 Mg precalciner portion kiln was conducted. The blend 60% 40% post-industrial products producing estimated plastic fibrous mixture. fed at 0.9 Mg/h 24h then 1.8 following 48 h. emissions data recorded were perform life-cycle analysis this study. included steps: transportation, landfill, processing combustion each step tracked two cases: (1) Reference Case, disposed uses coal its source, (2) which offset some accompanying indicate using produce kilns likely advantageous disposal landfills. fossil use, reduce CO2 emissions, away For test-case, 7700 8700 reduced by least 1.4%, diverted 7950 In addition, 19% SO2, while NOX increased 16% 24%. Changes particulate matter, mercury, hydrogen chloride, total-hydrocarbons all less than plus minus 2.2%, however measured Co-location MRFs, facilities, increase even further reducing transportation requirements.