Hydranautics recommended

Table 9.4 Hydranautics recommendation for beta values as a function of feed water quality.2...

Representative results include a drop in rejection for Filmtec FT-30 membranes to 98% over 152 days at a exposure of 1 ppm (see Figure 8.25), and a drop to 96% in 24 days at an exposure of 5 ppm (see Figure 8.26) (both tests were conducted at a pH of 7.0). Work by Glater (1981) shows severe damage at 1200 ppm-hrs exposure at pH 8.6, and relatively little damage under the same conditions at pH 5.8. Little if any studies have been recently reported which is hydranautics recommends are studies are (see chapter 8.2.1. ). ... 

Conventional wisdom calls for Beta values less than 1.2 in an RO design to minimize membrane fouling and scaling. Table 9.4 lists Hydranautics recommended beta values as a function of feed water quality. ... 

Table 9.1 Recommended flux rates as a function of feed water source, as adapted from Dow Water and Process Solutions and Hydranautics.1-...

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