| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a respiration speed measuring method for calculating the concentration of organic matter capable of being measured simply in a short time without supplying dissolved oxygen due to an oxygen containing gas during measurement. <P>SOLUTION: In the respiration speed measuring method for calculating a respiration speed on the bases of the lowering of dissolved oxygen due to activated sludge of a liquid to be measured containing organic wastewater in aerated to calculate the concentration of easily biodecomposable organic matter and the concentration of delay biodecomposable organic matter, organic wastewater, an activated sludge mixed liquid and dilution water are used in a mixed ratio that the concentration of CODcr concentration originating from the organic wastewater is 7-100 mg/L, the concentration of activated sludge (MLSS) is 300-1,200 mg/L and initial dissolved oxygen is 6-8 mg/L. Dissolved oxygen is measured until dissolved oxygen becomes Omg/L from the start of measurement and a chemical agent for suppressing the action of nitrating bacteria can be added to the liquid to be measured in the case of the presence of ammoniacal nitrogen. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
