Method of and apparatus for pre-treating make-up water contamina

Details Method of and apparatus for pre-treating make-up water contamina Method of and apparatus for pre-treating make-up water contamina

1982-03-23

1984-05-01

Wyse, Thomas G.

Liquid purification or separation

Processes

Treatment by living organism

119 2, 126415, 210747, 210170, C02F 332, F24J 302

Patent

active

044460252

ABSTRACT:
Make-up water contaminated with nutrients is pretreated by establishing a stagnant pond of brackish water having an upper wind-mixed layer exposed to solar radiation and of relatively low, uniform salinity, an intermediate halocline whose salinity increases monotonically with depth, and a lower collection layer of relatively high, uniform salinity. Make-up water contaminated with nutrients is added to the wind-mixed layer wherein the nutrients support the growth of photosynthetic microbes. The wind-mixed layer is provided with Artemia salina (brine shrimp) that feed on the photosynthetic microbes growing in the wind-mixed layer and extrude fecal pellets of a density in excess of the density of at least the upper layer of the pond, whereby the pellets sink below the wind-mixed layer, and preferably to the collection layer. Upward diffusion from the collection layer into the wind-mixed layer of the disintegrated constituents of the fecal pellets is suppressed by reason of the stratified nature of the halocline. In this way, the brine shrimp clear the wind-mixed layer of nutrients.

REFERENCES:
patent: 3916832 (1975-11-01), Sweeney
patent: 4171681 (1979-10-01), Berger et al.
patent: 4249480 (1981-02-01), Dugan et al.
patent: 4345581 (1982-08-01), Shacher
Dimentman, Chanan; Distribution and Biology of Artemia salina (L.) (Crustacia: Anostraca in Israel and the Sinai Peninsula; Israel Journal of Zoology; May 1981; Plus Attachment pp. 28-37.
Dimentman, H.; Distribution and Biology of Artemia salina in Israel and Sinai (In Hebrew with English Translation Attached), Hebrew Version Distributed at Zoological Association Meeting in BeerSheva, Israel, about Oct. 8, 1979.

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