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Analysing water-energy-GHG nexus in a wastewater treatment plant of Mumbai Metropolitan Region, India

机译：在印度孟买大都市区污水处理厂分析水能-CHG Nexus

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摘要

Developing nations are advancing towards improving municipal wastewater treatment infrastructure. However, there have been limited efforts in these countries to understand Water-Energy-GHG nexus for sustainable wastewater treatment. This study evaluates operational energy, total embodied energy and corresponding GHG emissions of a widely implemented municipal wastewater treatment technology in Mumbai Metropolitan Region of India. Data for wastewater inflow, total energy consumption and materials used in the unit processes of the treatment plant were collected and analysed. Direct GHG emissions from the plant were estimated using the method proposed by the intergovernmental panel for climate change (IPCC). The energy embodied within the materials used in the construction and operations of the plant was estimated using country-specific information. The results show that the energy intensity for plant operation and chemical oxygen demand (COD) removal was 0.23 ± 0.05 kWh/m~3 of wastewater treated and 1.12 ± 0.77 kWh/kg of COD removed, respectively. The embodied energy in chemicals and building materials during the plant's life cycle contributed 19% of the total embodied energy. Wastewater inflow with specific average energy consumption in wet-well pumping and blowers showed a negative and positive correlation, respectively. The total GHG emissions (direct and indirect) from the plant were ～0.22 kgCO_2eq/m~3 of wastewater treated. The study presents the energy accounting of a wastewater treatment system and extensive analysis of infrastructural data, which is scarcely accessible and available in developing countries.
机译：发展中国家正在推动改善市政污水处理基础设施。然而，这些国家有限努力了解可持续废水处理的水能-CHG Nexus。本研究评估了印度孟买大都市区广泛实施的市政废水处理技术的运营能源，总体体现能源和相应的温室气体排放。收集并分析废水流入的数据，用于处理植物的单位过程中使用的总能耗和材料。使用政府间气候变化（IPCC）提出的方法估计来自工厂的直接温室气体排放。使用特定国家的信息估算工厂建设和操作中使用的材料内的能量。结果表明，植物运行和化学需氧量（COD）去除的能量强度为0.23±0.05千瓦/ m〜3污水处理，分别为1.12±0.77kWh / kg鳕鱼。在植物生命周期内的化学品和建筑材料中的体现能量占总体现的19％。湿井泵送和鼓风机中具有特定平均能耗的废水流入分别显示出负相关和正相关。植物的总温室气体排放（直接和间接）为约0.22kgco_2eq / m〜3废水处理。该研究介绍了废水处理系统的能量核算，对发展中国家几乎无法访问的基础设施数据进行广泛分析。

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