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:
Nov. 04, 1986
Filed:
Dec. 16, 1985
Curtis S McDowell, Allentown, PA (US);
Polybac Corporation, Allentown, PA (US);
Abstract
This invention pertains to a method for analyzing the biochemical decomposibility of aqueous substrates by microorganisms and particularly to a method for analyzing the quality or biological toxicity of incoming sewage to a sewage disposal plant. The process comprises: placing a preselected amount of bacterial culture, in the form of a dried powder, in contact with a preselected amount of aqueous waste containing greater than 5 mg/l dissolved oxygen, the bacterial culture being capable of effecting aerobic biodegradation of organic waste; measuring the dissolved oxygen content of the aqueous waste during rehydration and respiration development of the microorganisms as a function of time; determining the rate of dissolved oxygen decline at a preselected time; and then comparing the rate of dissolved oxygen decline to the rate of dissolved oxygen for a preselected baseline standard substrate. By comparing the ratio of dissolved oxygen decline at a preselected time with respect to a test sample and a standard substrate one can calculate the relative toxicity or inhibition of the incoming sewage to aerobic respiration and growth.