西安思源学院污水处理再生水回用系统的决算和运行成本分析
Account and Operation Cost Analysis of Reclaimed Water Reuse System of Sewage Treatment—Take Xi’an Siyuan University as an Example

西安思源学院的污水处理再生水回用工程是一个完整的从原材料(污水收集、处理)到合格产品(符合国家回用水标准的再生水)流通成为商品(再生水回用)系统。该工程(子系统建设费用包括4000m³/天的A²/O-MBR污水处理建筑与设备、校园内再生水回用管道与泵站、和摊销费用等)的决算为2238.13万元人民币。单位投资费用为5595.33元/m³/天。根据西安思源学院运转10年A²/O-MBR的有关数据分析，第一年至第五年，包含膜折旧期和分摊销费的单位回用水成本为3.29~3.58元/m³。在没有膜更换的前提下，完成膜折旧和摊销费用折旧的第六年到第十年，单位回用水成本为2.46~2.64元/m³。迄今为止，该系统已处理670万m³的污水，产出440万m³符合国家标准再生水并全部回用。
The sewage treatment reclaimed water reuse project of Xi'an Siyuan University is a complete system from raw materials (sewage collection and treatment) to qualified products (reclaimed water conforming to the national reclaimed water standards) into the commodity (reclaimed water re-use). The final account of the project (subsystem construction costs include 4,000 m³/day of A²/O-MBR se wage treatment building and equipment, reclaimed water reuse pipeline and pump station on campus, and amortization expenses, etc.) is RMB 22.3813 million. The unit investment cost is 5595.33 yuan/m³/day. According to the relevant data analysis of A²/O-MBR of Siyuan University for 10 years, from the first year to the fifth year, the unit water reuse cost including membrane depreciation period and partial amortization expenses is 3.29 to 3.58 yuan/m³. Without film replacement, from the sixth year to the tenth year after the depreciation of membrane depreciation and amortization expenses is completed, the unit reuse cost is 2.46~2.64 yuan/m³, the unit water reuse cost is 2.46~2.64 yuan/m³. So far, 6.7 million m³ sewage has been treated by the system, and 4.4 million m³ reclaimed water in accord with the national standards has been produced and reused.