High‐Rate Sedimentation in Water Treatment Works | Zendy

Culp Gordon | Zendy; Hansen Sigurd | Zendy; Richardson Gordon | Zendy

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High‐Rate Sedimentation in Water Treatment Works

Author(s) -

Culp Gordon,

Hansen Sigurd,

Richardson Gordon

Publication year - 1968

Publication title -

journal ‐ american water works association

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.466

H-Index - 74

eISSN - 1551-8833

pISSN - 0003-150X

DOI - 10.1002/j.1551-8833.1968.tb03594.x

Subject(s) - sedimentation , turbidity , raw water , filtration (mathematics) , filter (signal processing) , tube (container) , flocculation , environmental science , water treatment , environmental engineering , slow sand filter , geology , geotechnical engineering , waste management , engineering , mathematics , geomorphology , sediment , oceanography , statistics , electrical engineering

Shallow tubes are very efficient sedimentation devices. Two basic tube configurations have been used: essentially horizontal, and steeply inclined. Sludge is removed from the essentially horizontal tubes by automatically draining them each time the filter backwashes and refilling them with filter backwash water. Over 20 water treatment plants using these horizontal tubes with sedimentation detention times of less than 10 minutes with capacities of 20‐2,000 gpm are now in operation. In tests described in this paper, a plant providing flocculation, tube sedimentation, and mixed media filtration, produced potable water (0.1 JU turbidity) from a raw water turbidity of 1,000 JU with an overall plant detention time of 16 minutes. Flow distribution analyses demonstrate that the shallow horizontal tubes enable good flow distribution to be readily achieved.

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