| 摘要 |
[object] A technique for analyzing an oxygen consumption and an oxygen consumption rate in a process in which components of waste water are decomposed by aerobic microbes is provided. [Solving means] An oxygen consumption rate kx=KLa.(DOhf-highDOx) of a last block (block x) containing only one BOD component is first obtained by using the above approximate expression of a dissolved oxygen-concentration change curve, Deltatx=tx-tx-1, and BODx=kx.Deltatx; kx-1 of a block which contains two BOD components and which is second to the last block is then obtained from kx-1=KLa.(DOhf-highDOx-1)-kx=KLa.(highDOx-highDOx-1); by sequentially performing this calculation to a first block, an oxygen consumption rate ki of each BOD component is obtained by using the relationship represented by ki=KLa.(highDOi+1-highDOi); and in addition, the BOD concentration of each BOD component is also obtained based on pBODi=ki.tx.
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