模拟成藏地质填埋及诱导填埋有机质生气的理论初探

Sanitary landfill as biogas reservoir for promoting methane production

填埋处理和垃圾生物气的开发利用是实现城市生活垃圾资源化、无害化、减量化处理的有效途径,引入模拟生物气成藏和含气系统的思路,开展地质填埋与诱导填埋有机质生气研究是对能源地质学和填埋设计理念的新探索。通过对比研究地质填埋结构与地质学中生物气藏系统的异同点、生气机理和影响因素的共性与差异,初步论证了将模拟生物气藏理论引入地质填埋设计、优化地质填埋结构、提高填埋有机质生物气化效率和抽排利用效率的可行性;探讨了生物气藏理论在构建地质填埋结构中的可能应用和启示。研究表明:模拟生物气藏地质填埋设计和非常规生物气开发理念具有理论依据和现实基础;生物气藏生、储、盖要素和运、圈、保过程的模拟可应用于垃圾地质填埋场的构建,微生物地球化学理论有助于对诱导填埋有机质生气条件优化的认识。

Sanitary landfill with biogas collection is an attractive option for disposal of municipal solid waste （MSW）. Designing the landfill as a biogas reservoir to promote the methane production is a new concept for better utilization of an important source of available energy. The paper presents a literature review comparing the structure, biogasification mechanism and major parameters of landfill and biogas reservoir and suggests applying the biogas reservoir concept in the design of a sanitary landfill to promote methane production. Designing the landfill as a biogas reservoir for enhanced generation, collection and utilization of methane is reasonable and realistic. Modeling of biogas generation, seal in rocks and traps, migration and storage in a natural oil/gas reservoir as well as the geological microbiology fundamentals are helpful information for optimizing biogasification of organic fraction of MSW in landfill.