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首页> 外文期刊>Energy Conversion & Management >Improving biogas generation from aged landfill waste using moisture adjustment and neutral red additive - Case study: Hampton Downs's landfill site
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Improving biogas generation from aged landfill waste using moisture adjustment and neutral red additive - Case study: Hampton Downs's landfill site

机译：使用水分调节和中性红色添加剂改善老年垃圾填埋场废物的沼气 - 案例研究：Hampton Downs的垃圾填埋场

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摘要

Landfill gas (LFG) generation is typically predicted using the EPA's Landfill Gas Emissions Model (LandGem), which includes two parameters, the methane production potential (L-0, m(3) CH4 Mg-1 wet waste) and the first-order decay-rate constant (k, yr(-1)). In most cases, default parameters obtained from municipal solid waste (MSW) characterisation are used to estimate the LFG generation. However, changes in physical and chemical properties of MSW as a result of aging can affect the LFG results. In this study, aged municipal solid waste (MSW) samples buried in a landfill site between 2013 and 2018 were collected from two different depths to evaluate the effect of moisture and neutral red (NR) additives on biogas generation. The samples were anaerobically digested under different moisture contents. Neutral red (NR) additive with different concentrations was added to facilitate the direct electron transfer in the anaerobic media and to improve biogas generation. The results confirmed that LFG generation can be significantly improved by increasing the moisture content to 45% and introducing additives. This observation was more pronounced for the older samples collected from deeper portion of the same drilled hole. The samples collected from the old phase of landfilling in the presence of 80 mg/L NR aqueous solution produced 300% excess LFG. Higher concentration of NR was found to inhibit biogas generation due to the formation of ammonia-nitrogen. Estimation of LFG potential over 30 years in the LandGem model with new k and L-0 extracted from biogas accumulation curves suggested a 400,000 m(3) increase in LFG for only one gas well.
机译：通常使用EPA的垃圾填埋气体排放模型（LINEGEM）预测垃圾填埋气体（LFG）生成，包括两个参数，甲烷生产电位（L-0，M（3）CH4 MG-1湿法）和一阶衰减率常数（k，Yr（-1））。在大多数情况下，从市政固体废物（MSW）表征获得的默认参数用于估计LFG生成。然而，由于老化而导致MSW的物理和化学性质的变化可以影响LFG结果。在这项研究中，从2013年和2018年间填埋场埋藏的老年人固体废物（MSW）样本从两种不同的深度收集，以评估水分和中性红色（NR）添加剂对沼气产生的影响。样品在不同的水分含量下厌氧消化。加入中性红色（NR）添加不同浓度的添加剂以促进厌氧介质中的直接电子转移并改善沼气产生。结果证实，通过将水分含量增加至45％并引入添加剂，可以显着提高LFG产生。对于从同一钻孔的深部部分收集的较旧样本更加明显这种观察。在80mg / L NR水溶液存在下从填埋水渣的旧阶段收集的样品产生300％过量的LFG。发现较高浓度的NR抑制由于氨氮的形成引起的沼气产生。从沼气累积曲线提取的新K和L-0中LFG潜力估算LFG电位超过30年的LFG潜力建议，LFG仅为400,000米（3）升至仅一个气井。

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  • 来源
    《Energy Conversion & Management》 |2020年第7期|112947.1-112947.10|共10页
  • 作者

    Rasapoor M.; Young B.; Brar R.; Baroutian S.;

  • 作者单位

    Univ Auckland Fac Engn Dept Chem & Mat Engn Auckland New Zealand|EnviroWaste Serv Ltd Auckland New Zealand;

    Univ Auckland Fac Engn Dept Chem & Mat Engn Auckland New Zealand;

    EnviroWaste Serv Ltd Auckland New Zealand;

    Univ Auckland Fac Engn Dept Chem & Mat Engn Auckland New Zealand;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Neutral red; Municipal solid waste; Moisture content; Landfill; Biogas;

    机译：中性红色;市政固体废物;水分含量;垃圾填埋;沼气;

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