Study on oxygen-gas penetration mechanism and consumption reaction in sanitary landfills

卫生填埋场氧气渗透机理及消耗反应研究

• 批准号: 02650376
• 负责人: TANAKA Nobutoshi
• 金额: $ 1.54万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02650376/
• 关键词: Semi-aerobic landfill; Leachate treatment; leachate drainage and discharge pipe; Stabilization; BOD removal; Oxygen gas; Molecular diffusion; 拡散; ごみ埋立; 酸素侵入; 酸素消費; 反応速度; 多孔質; 拡散流れ

The following conclusions were obtained.1. On air flow in a pipeline network in a sanitary landfill(1) A considerable amount of air can flow into the pipelines when every end of pipeline network is open to the atmosphere. (2) The driving forces of air flow are temperature difference between the atmosphere and landfill layer, and suctim pressure by a wind velocity potential on the surface of a landfill site. (3) Therefore, gas composition in pipelines is nearly the same as the atmosphere. (4) Air flow rate in pipelines is influenced by some factors, such as temperature of pipe wall, wind velocity on landfill surface, depth of landfill layer, and clogging in pipelines.2. On oxygen penetration through landfill layer from pipelines(5) Main mechanism of oxygen penetration through layer is ordinary molecular diffusion with oxygen concentration difference. (6) The flux and depth of oxygen penetration are influenced by some factors , such as pore structure, reaction rate of oxygen consumption … More in the layer and oxygen concentration in pipelines. (7) In order to increase amount of oxygen penetrating, some design or management technique are required, such as appropirate design of pipe line network, prevention of very fine particle such as silt, clay and sludge from landfilling.3. On experimental study about removal ability of soluble BOD in aerobic landfill layer(8) In aerobic refuse or crushed stone layer, active biodegradation occurs and the rate of oxygen consumption is equal to that of TOC removal reaction, which is described by the Monotype equation, using oxygen gas concentration in the layer. (9) Oxidation rate of ammonuium-nitrogen is very low, compared with one of organic carbon.4. On estimation of BOD removal potential in the neighborhood of actual bottom leachate discharge pipe(10) Depth of aerobic zone round leachate discharge pipe in incineration residue, incombustible refuse and mixed refuse landfills is 0.5, 2 and 0.2m respectively. Therefore BOD removal ability in sixed refuse layer is estimated to be very low, but ones in incombustible refuse and crushed stone layer are estimated to be high, that is, several thousands mg/L of BOD can be removed. (11) A stabilization mechanism of leachate BOD in semi-aerobic landfills is considered to be biodegradation in aerobic zone round bottom leachate discharge pipes. Less

得出以下结论：1.关于卫生填埋场管网中的空气流动（1）当管网的每一端都与大气相通时，会有相当多的空气流入管道。(2)空气流动的驱动力是大气与填埋层之间的温差和填埋场表面风速势产生的吸力。(3)因此，管道中的气体成分几乎与大气相同。(4)管道内空气流速受管壁温度、填埋场表面风速、填埋层深度、管道堵塞等因素的影响.填埋场埋管中氧透过填埋层的机理研究（5）氧透过填埋层的主要机理是存在氧浓度差的普通分子扩散。(6)氧渗透的通量和深度受孔结构、耗氧反应速率等因素的影响 ...更多信息 和管道中的氧浓度。(7)为了增加氧气的渗透量，需要一些设计或管理技术，如适当的管网设计，防止淤泥、粘土和污泥等极细颗粒的填埋.好氧填埋层对可溶性BOD去除能力的实验研究（8）在好氧垃圾或碎石层中，生物降解反应是活跃的，耗氧速率与TOC去除速率相等，可用层内氧气浓度的Monotype方程描述。(9)氨氮的氧化速率很低，而有机碳的氧化速率最低.实际底部渗滤液排放管附近BOD去除潜力估算（10）焚烧残渣、不燃垃圾和混合垃圾填埋场渗滤液排放管周围好氧区深度分别为0.5、2和0.2m。因此，垃圾层中BOD的去除能力很低，而不燃垃圾层和碎石层中BOD的去除能力很高，可达数千mg/L。(11)准好氧填埋场渗滤液BOD的稳定化机理是在底部渗滤液排放管周围的好氧区进行生物降解。少

项目成果

田中 信寿: "廃棄物埋立処分地におけるガス及びガス成分の移動についてー廃棄物層・土壌層を流れるガスの移動方程式とその応用ー" 廃棄物学会誌. 2. 46-58 (1991)

Nobuhisa Tanaka：“废物填埋场中气体和气体成分的运动 - 通过废物和土壤层的气体运动方程及其应用”日本废物管理协会杂志 2. 46-58 (1991)。

T. Matuto et al.: "Numerical simulation of air flow in pipeline network of sanitary landfills" Proceedings of the 45th annual conference of the Japan society of civil engineers. 2. 976/977 (1990)

T.Matuto等：《卫生填埋场管网内空气流动的数值模拟》第45届日本土木工程学会年会论文集。

N. Tanaka et al.: "Gas and gas components migration in sanitary landfill sites --A set of basic equations on gaseous flow and diffusion through refuse and soil layers--" Waste Management Research. 2, No. 1. 46/58 (1991)

N. Tanaka 等人：“卫生填埋场中的气体和气体成分迁移——一组关于通过垃圾和土壤层的气体流动和扩散的基本方程——”废物管理研究。

松藤 敏彦,田中 信寿,柴田 清,神山 桂一: "埋立地集排水管内ガス流れの数値シミュレ-ション" 土木学会第45回年次学術講演会講演概要集. 第2部. 976-977 (1990)

Toshihiko Matsufuji、Nobuhisa Tanaka、Kiyoshi Shibata、Keiichi Kamiyama：“填海土地收集和排水管道中气体流动的数值模拟”日本土木工程师学会第 45 届年会学术会议摘要第 2 部分。976-977（1990 年）。

N. Tanaka et al.: "Theoretical study on BOD removal ability of semi-aerobic sanitary landfills" Proceedings of the 45th annual conference of the Japan socety of civil engineers. 986/987 (1990)

N. Tanaka等：《半好氧卫生填埋场BOD去除能力的理论研究》第45届日本土木工程师学会年会论文集。