The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 23, 2002
Filed:
Mar. 31, 2000
Patrice Chatellier, Paris, FR;
Philippe Caulet, Bailly, FR;
Suez-Lyonnaise des Eaux, Nanterre Cedex, FR;
Abstract
This method uses the on/off sequences of an aeration system of treatment basins. The sequences are imposed by the running of a treatment process, to estimate the respiration of biomass, the latter being measured during non-aeration phases. There is an initial determination, from the concentration of dissolved oxygen, of the change in the amount of oxygen contained in the aeration basin. There is a subsequent determination of the amount of oxygen leaving the aeration basin, the amount of oxygen entering the basin during the non-aeration phase being regarding as zero. Next is a determination, on the basis of the information collected in the above steps, of the respiratory capacity of the purifying biomass. There is then a determination of the mass of suspended matter in the purifying biomass and calculation, from the respiratory capacity of the biomass and from the sludge concentration, of the amount of oxygen consumed per unit mass of biological sludge and per unit time.