西班牙计划在马德里开设全国第一家使用再生水的绿色氢工厂，且预计将于2024年在平托镇的Arroyo Culebro Cuenca Media Alta废水处理设施投入运营。该工厂由西班牙首都马德里的水资源管理公司Canal de Isabel II负责建造。
该项目的初始年产能约为80000公斤氢气，且因多种原因备受瞩目。首先，它将利用再生水并通过电解法进行额外处理来生产氢气。马德里政府表示，这将是西班牙规模最大的、利用再生水的绿色氢工厂。
这座设施还将结合两项可再生能源技术（即太阳能发电和沼气热电联产），并利用处理厂自身的废水。它还将利用电解过程中产生的氧气加强废水净化处理，以提升处理120万居民生活污染的能力。
Canal de Isabel II将通过三级处理向电解槽提供符合要求的水，每生产1公斤氢气需要12升水。该项目投资达730万欧元（合780万美元），预计将在未来13个月内完工。
此外，这家废水处理厂每天将生产多达3000万升的常规再生水，并借助超滤膜和反渗透水处理法用于灌溉绿地或清洁街道等用途。
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