Water treatment
AssigneeDdp Specialty Electronic Materials US, LLC
InventorsGuillem Gilabert Oriol, Marcus J. Slagt, Gerard Massons
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Abstract
Provided is a method of treating feed water comprising the step of passing the feed water through a biostratum that comprises resin beads and living microorganisms to produce biostratum-treated water, wherein (a) the area-normalized free void volume in the biostratum is 0.018 m3/m2 or less; (b) the packing density in the biostratum is 0.68 to 0.96; (c) the ratio of the exterior surface area of the resin beads to the total free void volume in the biostratum is less than 2.0 to 50 m2/L; (d) the velocity of the water through the biostratum is 1 to 1,500 biostratum volumes per hour; and (e) the Reynolds number of the flow through the biostratum is 0.10 to 3.0.
Claims5
A method of treating feed water comprising the step of passing the feed water through a biostratum that comprises resin beads and living microorganisms to produce biostratum-treated water, wherein (a) the area-normalized free void volume (ANFVV) in the biostratum is 0.018 m3/m2 or less, wherein ANFVV is total free void volume divided by the area of the cross section of the biostratum;
- (b) the packing density in the biostratum is 0.68 to 0.98;
- (c) the ratio of the exterior surface area of the resin beads to the total free void volume in the biostratum is 2.0 to 50 m2/L;
- (d) the flow rate of feed water through the biostratum is 100 to 1,000 biostratum volumes per hour;
- and (e) the Reynolds number of the flow through the biostratum is 0.10 to 3.0;
- and further comprising passing the biostratum-treated water through an apparatus that performs a reverse osmosis process.
Dependencies are inferred from the claim text.