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Reduction of Greenhouse Gas Emissions From Municipal Wastewater Treatment in Mexico Based on Technology Selection

机译：基于技术选择减少墨西哥城市污水处理产生的温室气体排放

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摘要

As do many developing countries and emerging economies, Mexico needs to invest in wastewater treatment facilities, which has been neglected in the past. Currently, 45% of municipal sewage enters a treatment plant, so a significant fraction of untreated or partially treated water is discharged or used for crop irrigation. This has significant impacts on public health and the environment. In this context, the proper selection of treatment technologies may be an important opportunity for contributing to the ambitious national greenhouse gas (GHG) emission reduction goals in Mexico. Based on actual infrastructure data, the scenarios analyzed in this work show that emission reductions from sewage treatment plants in Mexico could be as high as 34% when compared to the baseline scenario, depending on the treatment technologies. The results show that the anaerobicþaerobic scenario is a better option than the full aerobic scenario, as it would achieve a 4% GHG emission reduction by the year 2030. Moreover, if methane is used for in situ electricity cogeneration in larger facilities, the reduction reaches 27% versus the full aerobic scenairo. The results may be helpful to policy and decision makers to evaluate the cost effectiveness and feasibility of possible GHG mitigation strategies for wastewater treatment facilities, mainly for new infrastructures in developing countries.
机译：像许多发展中国家和新兴经济体一样，墨西哥需要投资废水处理设施，而这在过去一直被忽略。目前，城市污水中有45％进入污水处理厂，因此未处理或部分处理的水有很大一部分被排放或用于农作物灌溉。这对公共卫生和环境具有重大影响。在这种情况下，正确选择处理技术可能是有助于实现墨西哥宏伟的国家温室气体（GHG）减排目标的重要机会。根据实际的基础设施数据，此工作中分析的方案表明，与基线方案相比，墨西哥污水处理厂的减排量可能高达34％，具体取决于处理技术。结果表明，厌氧-好氧方案比完全有氧方案更好，因为到2030年将实现4％的温室气体排放。此外，如果将甲烷用于大型设施的原地热电联产，则可达到与完整的有氧scenairo相比为27％。该结果可能有助于政策和决策者评估废水处理设施（主要是发展中国家的新基础设施）的可能的温室气体减排战略的成本效益和可行性。

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