Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow
Patent
1978-11-06
1980-06-24
Castel, Benoit
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Responsive to fluid flow
210 16, 210170, 2101951, 47 14, C02C 102
Patent
active
042093880
ABSTRACT:
Steps are disclosed in a method for the complete treatment of sanitary sewage comprising water containing suspended or dissolved organic matter, the concentration of which is measured by biochemical oxygen demand (BOD). A part of the method relies upon a waste stabilization pond containing algae for aerobic decomposition of the organic matter, followed by removal of algae in a second algae removal pond. Another aspect of the invention is provision of a polishing pond constructed with a circumferential weir for maximizing exposure to sunlight and for aeration. A further aspect of the method of the invention involves optional provision of a facultative pond of increased capacity for reduction of BOD by use of combined aerobic and anaerobic treatment which avoids the drawbacks commonly associated with entirely anaerobic treatment processes.
REFERENCES:
patent: 2867945 (1959-01-01), Gotaas et al.
patent: 3431200 (1969-03-01), Davis et al.
patent: 3485750 (1969-12-01), Albertson
patent: 3598726 (1971-08-01), Welch
patent: 3780471 (1973-12-01), Ort
patent: 3819512 (1974-06-01), Praznovsky et al.
patent: 4005546 (1977-02-01), Oswald
Castel Benoit
Jacobson Harvey B.
O#Brien Clarence A.
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