Hydraulic and earth engineering – Fluid control – treatment – or containment – Flow control
Patent
1980-08-11
1982-10-05
Castel, Benoit
Hydraulic and earth engineering
Fluid control, treatment, or containment
Flow control
210170, 405 91, 405115, 47 14, E02B 700
Patent
active
043525911
ABSTRACT:
The invention is an improved weir means for use in algae growing reactors in a controlled natural purification system for advanced waste water treatment and algae farming. The invention is a pneumatic device that eliminates the need for a mechanically operated lift-type rigid weir for controlling the level of liquids and increasing the algal concentration in an algae growing reactor and separation of suspended solids in the effluent therefrom. The pneumatic toroidal weir consists of a toroid or doughnut shaped means that can be inflated and deflated. The device rests in and is affixed to a circular ring-like base. The interior periphery of the toroid or doughnut configuration is convoluted to improve controlled inflation and deflation; to reduce interior overhang, and to increase toroidal height without increasing volume. Chines are set along and around the outer periphery of the toroidal weir to reinforce the outer wall and to inhibit settled or settling algae from "climbing" over the weir when liquid is decanted from the algae growth reactor in the algae separation mode.
REFERENCES:
patent: 3173269 (1965-03-01), Imbertson
patent: 3834167 (1974-09-01), Tabor
patent: 3855800 (1974-12-01), Ganzinotti
Castel Benoit
Finch Walter G.
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