How to Prevent Bacterial Growth in Ultrapure Water Equipment

After prolonged use, ultrapure water equipment inevitably experiences bacterial growth. This bacterial growth affects the quality of the produced water and can also damage the equipment itself. So, what precautions should be taken to prevent bacterial growth in ultrapure water equipment?

1. The amount of sodium hypochlorite added should be adjusted according to the bacterial count in the water source. In addition to regular bacterial count testing, the free chlorine at the inlet of the mixed ion exchange column should also be tested to prevent excessive free chlorine levels, which can affect the normal operation of the resin.

2. Pay attention to the contamination of the water point stopcock. Stopcocks used less frequently are prone to microbial contamination. Once contaminated, they cannot be restored to their original state without prolonged flushing.

3. Commercially available sodium hypochlorite solution is easily oxidized and decomposed. If the system is used for an extended period or shut down for long periods during holidays, in addition to draining water from the tank to allow the reverse osmosis membrane to run for several hours periodically to maintain system activity, the sodium hypochlorite solution should also be replaced as needed.

4. Mixed ion exchange columns are typically used with one in operation and one on standby. Bacteria can multiply rapidly in stagnant ultrapure water. Therefore, the standby mixed bed is usually regenerated before being put into operation to ensure sterilization effectiveness.

The above is an introduction from Sichuan Youpu Ultrapure Technology Co., Ltd. regarding precautions to prevent bacterial growth in ultrapure water equipment. Bacterial growth in ultrapure water equipment can contaminate anion exchange resin, reducing its exchange capacity, increasing regenerant consumption, deteriorating effluent quality, and shortening resin lifespan. Therefore, it is crucial to pay attention to bacterial growth during use to ensure stable operation of the ultrapure water equipment.