Improvement and exploration of a water conservation system in the Central Sterile Supply Department (节水型消毒供应中心给水系统改进与探索)

Abstract

Objective To design a water conservation system for reasonable use of water resources and reducing water costs in the Central Sterile Supply Department. Methods To conduct the quality analysis of concentrated water initially. Once recovery requirements are met, the water pipes were modified to recover the concentrated water for storage, and the booster pump was used to pipeline the concentrated water to the water consuming point. The secondary purified water which conductivity ≤5μS/cm(25℃) was used for steam sterilization. The condensate water produced after the completion of pressure steam sterilization was cooled and recycled through a condenser and stored in a condensate storage tank, and then it was used for instrument cleaning, washing, rinsing and as raw water for secondary reverse osmosis after disinfection and sterilization procedure. The quality of concentrated and condensate water was monitored regularly, and were recovered firstly in the process of instrument rinsing and washing, and continuous monitoring of cleaning and sterilization quality was carried out. Results After the improvement of the water system, it was able to recycle 533 tons of condensate and more than 8, 800 tons of concentrated water per year. Conclusion The water conservation system could guarantee the quality of instrument cleaning, disinfection and sterilization, and also reduce the cost of water. (目的 设计节水型消毒供应中心用水系统, 以实现水资源合理利用并降低用水成本。方法 对反渗透制水机浓水水质化验分析, 达到回收要求后, 对管路进行改造, 将浓水回收储存, 并使用增压泵将浓水通过管道送到用水点; 压力蒸汽灭菌蒸汽供给水使用电导率≤5μS/cm(25℃)二级纯化水, 在压力蒸汽灭菌完成后产生的冷凝水, 通过冷凝器进行冷却回收存放于冷凝水储罐中, 经消毒杀菌处理后用于器械冲洗、洗涤、漂洗以及作为二级反渗透原水使用; 对回收的浓水及压力蒸汽灭菌器冷凝水水质定期监测, 在水质电导率指标监测合格情况下, 在常规器械冲洗、洗涤环节优先回收浓水及灭菌器冷凝水, 并对器械清洗质量和灭菌质量连续监测。结果 节水型消毒供应中心用水系统改进后, 医院每年能够回收利用冷凝水533吨、浓水8800余吨。结论 节水型消毒供应中心用水系统的设计既能保障器械清洗消毒灭菌质量, 又能降低用水成本。