Weighing scales – Self-positioning – Buoyancy type
Patent
1988-06-10
1989-05-16
Miller, Jr., George H.
Weighing scales
Self-positioning
Buoyancy type
177 2514, 73444, G01G 502, G01G 1940, G01N 900
Patent
active
048301264
ABSTRACT:
An apparatus for automatically measuring the apparent weight of a sludge contained in a liquid and a system for automatically measuring the PONSAR index of such a sludge, using the apparatus. The apparent weight of a liter of clarified liquid is obtained by means of optoelectronic means (22, 106, 108) allowing the measurement of the difference between the two levels of clarified liquid in a reservoir (18), corresponding to the reaching therein of an equilibrium position by a flask (20) successively filled with sludge-charged liquid and clarified liquid respectively. Detection means (52, 54) allow the measurement of the volume of sludge decanted in half an hour in a test tube (28) filled with 1 liter of sludge-charged liquid and 1.5 liter of clarified liquid. Calculation of the volume-to-weight ratio then gives the PONSAR index.
Application to the operation of sewerage plants. FIG. 2.
REFERENCES:
patent: 3871489 (1975-03-01), Patigalia
patent: 4000657 (1977-01-01), Ponsar
patent: 4216886 (1980-08-01), Puschalovsky et al.
patent: 4779462 (1988-10-01), Boullet et al.
Commissariat a l''Energie Atomique
Miller Jr. George H.
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