医院，城市供水

带有复杂管道系统的大型建筑（例如医院）都会遭遇水传播致病细菌（如军团杆菌和假单胞菌）的影响，从而对患者和职工构成威胁。即使供水水质很好，但是长时间的用水会导致供水系统中产生生物菌膜，从而为上述细菌提供了良好的繁殖场所。

要彻底解决上述问题难度很大，而且成本很高。针对这种情况，滨特尔开发出了医疗用水过滤系列产品，以及内部使用膜结构的定点淋浴和水龙头过滤器。然而，对于新建建筑而言，最好采用“根除式”解决方案，通过使用超滤膜处理所有供水。

The municipality of Kungälv in western Sweden near the city of Gothenburg was facing two main challenges concern­ing its drinking water supply. First, a fast-growing number of households is increasing local and regional demand for drinking water, while at the same time the existing ground infiltration plant was at maximum capacity and could not be expanded. Second, the design of a new treatment plant to take water directly from a river susceptible to varying water quality conditions. The treatment plant is located near Kungälv on the bank of Sweden’s largest river: the Göta river. The COD levels in this surface water are on the rise, and climate change is only going to push them higher. The river is also a strategic transport route and has several wastewater treatment plants that discharge into it.

Higher average temperatures will bring much more pre­cipitation that will have a marked effect on the quality of raw water sources for drinking water. Excess surface runoff brings high humus levels and algal blooms fed by nutrients from fertilizers, entering the aquatic system and causing excessive growth. Microbial contamina­tion will increase in raw water sources as a result. The existing drinking water treatment process in Kungälv was strug­gling to meet the required microbiolog­ical barrier levels, as several wells were being increasingly affected.

To increase the overall system water recovery and to reduce the waste stream, there are two successive ultrafiltration stages. The primary UF system uses the Pentair X-Flow Xiga Solution, the highest surface area-to-footprint ratio in the market, and its backwash waste is treated with the secondary UF system that uses the Pentair X-Flow Aquaflex Solution, the proven technology for high solids membrane filtration applications. 

Membrane+ is the X-Flow approach to ensuring success in every filtration project through close involvement and cooperation from the first concept to full-scale operations. Expert assistance, especially from an early stage onward, will always make the difference in terms of quality, safety, efficiency and reliability. The Pentair X-Flow engineers are committed to provide all practical support you need in every one of the four main project phases.

Pentair Pilot Engineer Martijn Lesscher was involved in the development phase, working together with Purac on the piloting. ‘The combined effort of all operators has made this trial a success. performance.’ During the design phase, various calculations were made for the complete UF system, including all equipment specifications and selection guidelines for a robust system design that meets best engineering practices for operational efficiency and reliability. ‘Our process design and calculations also covered the neutralization system, and the tank dimensioning for the UF system.

The frequent interactions and meetings with the Purac engineering team helped me to understand and meet their specific requirements. Working together closely in every project phase enables us to deliver successful and sustainable ultrafiltration solutions.’

供水控制点可防止形成生物菌膜，并防止医院免受水传播细菌的影响，并持续多年，从而使得感染控制变得更容易，并最具成本效益。此外，其他优点还表现在：根据所在国家的法规，冲洗方案变得简化，同时也降低了流入锅炉的回水的最小温度。

得益于优质水质，所有其他水处理系统（例如反渗透系统、锅炉、制冰机，甚至包括饮水机）均能从中受益。这类控制系统专门针对具体项目并根据所服务设备的需求定制研发。