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Life Cycle Assessment of an intensive sewage treatment plant in Barcelona (Spain) with focus on energy aspects

机译:西班牙巴塞罗那的一个污水处理厂的生命周期评估,重点是能源方面

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Life Cycle Assessment was used to evaluate environmental impacts associated to a full-scalenwastewater treatment plant (WWTP) in Barcelona Metropolitan Area, with a treatment capacity ofn2 million population equivalent, focussing on energy aspects and resources consumption. Thenwastewater line includes conventional pre-treatment, primary settler, activated sludge with nitrogennremoval, and tertiary treatment; and the sludge line consists of thickening, anaerobic digestion,ncogeneration, dewatering and thermal drying. Real site data were preferably included in theninventory. Environmental impacts of the resulting impact categories were determined by the CLM 2nbaseline method. According to the results, the combustion of natural gas in the cogeneration enginenis responsible for the main impact on Climate Change and Depletion of Abiotic Resources, while thencombustion of biogas in the cogeneration unit accounts for a minor part. The results suggest that thenenvironmental performance of the WWTP would be enhanced by increasing biogas productionnthrough improved anaerobic digestion of sewage sludge.
机译:生命周期评估被用来评估与巴塞罗那大都市区一个规模为200万人口当量的污水处理厂(WWTP)相关的环境影响,重点是能源方面和资源消耗。废水处理线包括常规预处理,一级沉降器,脱氮活性污泥和第三级处理;污泥生产线由增稠,厌氧消化,沼气,脱水和热干燥组成。实际站点数据最好包含在当时的清单中。最终影响类别的环境影响通过CLM 2nbaseline方法确定。根据结果​​,热电联产发动机中的天然气燃烧对气候变化和非生物资源的枯竭具有主要影响,而热电联产机组中的沼气燃烧仅占很小的比例。结果表明,通过改善污泥的厌氧消化来增加沼气的生产,可以提高污水处理厂的环境性能。

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