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Landfill Gas Processing: Plant-Design Considerations

By Babak Firoozi |

There are several technologies used in the disposal of landfill gas (LFG). Here are some key elements that can guide engineers in designing an optimized LFG processing plant People generate trash. Trash is stored in landfills. Landfills contain bacteria, which decompose the trash to produce combustible landfill gas (LFG) [1]. LFG is a hazardous, flammable greenhouse gas containing mainly methane (CH4), along with many other components, including siloxanes, CO2 and mercaptans, as well as asphyxiants like hydrogen sulfide (H2S) and volatile organic compounds (VOCs). A detailed breakdown of typical LFG composition is given in Table 1. It also can be a valuable source of renewable energy. If not disposed of properly, LFG can become an explosive and hazardous threat to nearby communities [2]. The minimum required disposal for LFG is incineration. This is typically used by smaller landfills, which do not generate enough LFG to produce a valuable volume of product. Direct-use methods, which are typically employed by medium- to large-size landfills, combust the LFG to take advantage of its heat content [3]. Electricity generation, cogeneration (cogen) of steam and electricity, boilers, kilns, iron forges and other thermal applications are…
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