Methane recovery from anaerobically treated wastewater

从厌氧处理废水中回收甲烷

• 批准号: 529279-2018
• 负责人: Lee, Jongho
• 金额: $ 1.82万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=657036
• 关键词: Methane; recovery; anaerobically; treated; wastewater

Wastewater is recognized as a promising source for biomethane, a clean, high-energy density fuel. Anaergia**Inc. is a front runner in providing solutions for energy recovery from wastes. One such focus of Anaergia is to**develop an efficient wastewater treatment process for maximized biomethane production. Anaergia recently**developed Omnivore process that effectively concentrates wastewater and facilitates microbial activity for**wastewater treatment. While this process can dramatically increase the methane production, biomethane**produced during wastewater treatment exists as dissolved gas and therefore requires additional steps for its**extraction. However, the relatively low temperature of typical wastewater (~ 15 °C) makes it difficult to**capture the biomethane, as methane becomes more soluble at lower temperature. This technical barrier limits**the full utilization of their Omnivore process for biomethane production and harvesting from municipal**wastewater.**The proposed research develops a novel separation process that can efficiently extract dissolved methane from**wastewater at a wide range of temperature. The process employs an omniphobic membrane, a special**membrane that can resist wetting by liquids. The dissolved methane is withdrawn from the wastewater across**the omniphobic membrane, to a solvent that has high methane solubility. Key objectives of this research are (1)**identification of proper draw solvents, (2) demonstration of methane extraction, and (3) investigation of**impacts of environmental conditions on methane extraction efficiency. Successful demonstration of the**methane extraction will prove the potential of vastly available municipal wastewater as a source of clean**biofuel. Combined with the Omnivore process, the proposed method can potentially turn the currently**energy-consuming treatment processes into a net energy producer.

废水被认为是一种很有前途的生物甲烷来源，生物甲烷是一种清洁的、高能量密度的燃料。阿纳尔贾**公司在提供废物能源回收解决方案方面处于领先地位。AnAergia的重点之一是**开发一种高效的废水处理工艺，以最大限度地提高生物甲烷的产量。AnAergia最近**开发了杂食工艺，可以有效地浓缩废水并促进微生物活动，用于**废水处理。虽然这一过程可以极大地增加甲烷的产量，但在废水处理过程中产生的生物甲烷**以溶解气体的形式存在，因此需要额外的步骤来提取它。然而，典型废水的温度相对较低(约15摄氏度)，由于甲烷在较低温度下变得更容易溶解，因此很难**捕获生物甲烷。这一技术障碍限制了**他们的杂食工艺用于生产生物甲烷并从城市**废水中收集的充分利用。**拟议的研究开发了一种新的分离工艺，可以在广泛的温度范围内从**废水中高效地提取溶解的甲烷。这一过程使用了一种无所不在的膜，一种特殊的**膜，可以抵抗液体的润湿。溶解的甲烷从废水中通过无所不包的膜被抽走，进入一种具有高甲烷溶解度的溶剂。本研究的主要目的是：(1)确定合适的提取溶剂；(2)甲烷提取的示范；(3)研究环境条件对甲烷提取效率的影响。甲烷提取的成功示范将证明大量可用的城市废水作为清洁生物燃料来源的潜力。与杂食过程相结合，建议的方法可能会将目前**耗能的处理过程转变为净能源生产者。