In the manufacture of mineral water, there are two kinds of membrane technology, one is microfiltration and the other is ultrafiltration. In the engineering design, the pore diameter of the membrane will be selected according to the water quality analysis report of the mineral water. The type of membrane, in the system design, can choose multi-stage microfiltration membrane series process, or ultra-filtration and micro-filtration combination process, the former is suitable for mineral water source with less colloid, less particulate content, lower turbidity and stable water quality. The latter is suitable for water sources with more colloids and fine particles. It is worth noting that the mineral water production system using ultrafiltration membranes is likely to be discontinued in winter due to the strong seasonality of mineral water, and many mineral water plants are produced in single shifts. Longer, because the pipeline of the ultrafiltration device is more complicated and there are more dead zones, it is especially important in the process of chemical cleaning and disinfection of ultrafiltration membranes. At the same time, considering the possible broken yarn phenomenon of the ultrafiltration membrane module in the production process, a microfilter is usually added after the ultrafiltration to prevent the leakage of the ultrafiltration membrane, but the microfilter has a long service life and an extremely low running cost.
In the manufacture of mineral water, membrane filtration technology is one of the key technologies for effective control of product transparency and bacterial indicators. The quality of the membrane itself directly affects the qualification of mineral water products. The pore size distribution, porosity and membrane integrity are the key indicators of mineral water filtration membranes. Users pay great attention to the purchase.
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