Patent ID: 9423373
Filing Date: 2016-08-23
CPC Classification: G01N

Claim Text:
1. A method for detecting biochemical oxygen demand (BOD), comprising the steps of: a) subjecting an air-saturated microorganism-containing water sample to microorganism cultivation to obtain a biofilm; b) allowing an air-saturated blank water sample to pass through the biofilm obtained in said step a), and determining a dissolved oxygen (DO) reduction current of said blank water sample; c) allowing an air-saturated target water sample to pass through the biofilm having been subjected to said step b), and determining a DO reduction current of said target water sample; d) calculating the difference between the DO reduction current of said blank water sample and the DO reduction current of said target water sample according to the DO reduction current of the blank water sample obtained in said step b) and the DO reduction current of the target water sample obtained in said step c); and e) determining BOD of the target water sample according to the difference obtained in said step d) and a predetermined standard curve; wherein said microorganism-containing water sample is activated sludge, surface water, domestic sewage or microorganism-containing industrial wastewater; and said blank water sample is one or more selected from tap water, well water, rain water and groundwater.