Abstract
Root Analogous Municipal Solid Waste System “RA-MSW” is a novel management system that manages waste, biogas, and leachate in bioreactor landfill. Different than conventional disposal at landfills, waste is penetrated by synthetic roots that serve dual mission for biogas collection and leachate recirculation. RA-MSW roots are permeable hydropho- bic polymer material that are formed on-place or prefabricated at factory from recyclable material available on the dumping area. Since the material is hydrophobic, it does not contain water in the voids providing more space for gas transport and collection. The roots are also interchangeably used for leachate recirculation where the parameters of wa- ter content, nutrients, pH, and temperature are optimized to enhance biogas production simultaneously with leachate treatment. RA-MSW provides new approach of waste management and control; it has new virtues of landfill operation; new material medium for biogas collection; new biocell design configuration; new manipulation for leachate and biogas. The approach adds new merits for solid waste management, bio-energy utilization, and the concept of 5 R’s cycle for MSW management.
Highlights
Leachate and biogas are two discharges that are characteristic of municipal solid waste (MSW) landfills
Different than conventional disposal at landfills, waste is penetrated by synthetic roots that serve dual mission for biogas collection and leachate recirculation
The roots are interchangeably used for leachate recirculation where the parameters of water content, nutrients, pH, and temperature are optimized to enhance biogas production simultaneously with leachate treatment
Summary
Leachate and biogas are two discharges that are characteristic of municipal solid waste (MSW) landfills. It is effective in enhancing gas production and improving leachate quality especially in terms of COD. The first and most important part in the biodegradation process of organic material in sanitary landfill is the hydrolysis, which is likely to be the rate-limiting step for methane production from solid waste [16]. The second phase of the biochemical process is the acidification, where carbon dioxide and acetate are produced from the biodegradation of organic matter. In this phase, the pH value has important effect on the methanogens [17]. The mass balance coupled with the Monod formula is used to describe the microbial growth within landfill: Mass balance:
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