Aluminum Reactions and Problems in Municipal Solid Waste Landfills
نویسنده
چکیده
Aluminum enters municipal solid waste MSW landfills from untreated raw curbside trash MSW , industrial waste, and aluminum production wastes variously called dross, baghouse fines, salt cake, and other designations. Aluminum related reactions can arise and become problematic for landfill operations by generating undesirable heat, liquid leachate, and gases, such as hydrogen, hydrogen sulfide, carbon monoxide, and ammonia. Temperature excursions up to 150°C 300°F and landfill gas pressures exceeding 210 kPa have been observed. Water from the MSW, precipitation, injection, and/or surface water management can result in sufficient water to trigger problematic aluminum related reactions. Another source of water in a MSW landfill is leachate recirculation, which is not recommended if substantial aluminum is present in the landfill mass because it can lead to a problematic aluminum related reaction. This paper examines the chemical reactions involving aluminum in landfills and the negative consequences of introducing aluminum into MSW landfills regardless of its origin. Proposals for mitigating aluminum reactions are also presented. DOI: 10.1061/ ASCE HZ.1944-8376.0000045 CE Database subject headings: Solid wastes; Aluminum; Chemicals; Waste disposal; Landfills. Author keywords: Solid waste; Leachate stability; Leachate recirculation; Aluminum; Chemical reaction; Waste disposal.
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