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When the water temperature rises, in some Frp Membrane Housing reverse osmosis systems with constant flow operation, the system desalination rate will decrease.
This is due to the increase in water temperature resulting in a decrease in viscosity and an increase in water flux. If the constant flow operation is maintained, the operating pressure required to produce the same flow rate of water will decrease. The decrease in operating pressure will result in a decrease in desalination rate. Subsequent desalination The regeneration period of the equipment will also be shortened at the same time.
To keep the desalination rate of the system unchanged, it is necessary to adopt constant pressure operation, but at this time, the water production will increase, and with the increase of temperature, the water production will continue to increase.
Therefore, under high water temperature conditions, the maintenance of system performance needs to be adjusted accordingly according to actual needs.
However, the problems brought by high water temperature to system maintenance are not limited to these, and the greater danger comes from microbial contamination.
The water temperature in summer is mostly 15-30°C, and this temperature is also a suitable condition for the growth of most bacteria. As the water temperature rises, the bacterial metabolic rate and growth rate will increase accordingly.
Once microorganisms enter the Ro System, they will reproduce and grow with the help of concentrated nutrients in the RO concentrated water section, and they can even survive in the water production section.
In an environment with relatively hot water temperature, microorganisms reproduce rapidly, and a biofilm layer can be formed on the surface of the Ro Membrane within a few days, resulting in a rapid increase in the pressure difference between the inlet and outlet water of the RO system, a rapid decline in water production and desalination rate, and at the same time, the product water polluted.
Biological fouling leads to shrinkage of the diaphragm of roll-type modules, which is called the "telescope" phenomenon in the industry.
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