the abovementioned procedure and the toc value thereof was reduced from 12250 ppb to 7840 ppb with a removal rate of 36 a further treatment on the discharge water of 7840 ppb by repeating the abovementioned procedure successfully reduced the toc value to 4468 ppb with a removal rate of 43 thus when the waste water was repeated treated by the abovementioned procedure the toc value thereof can be reduced below a desired concentration the uv ozone oxidation removal modules could be connected in series continuously or discontinuously i e another purification element that was not a uv ozone oxidation removal module could be inserted between two adjacent modules the experimental steps of example 1 were repeated with the influent being changed to a waste water containing a toc of nmp of about 10053 ppb the toc of the influent was first reduced to about 6700 ppb with a removal rate of 33 and then to about 3820 ppb with a removal rate of 43 thus when the waste water was repeated treated by the abovementioned procedure the toc value thereof could be reduced below a desired concentration the uv ozone oxidation removal modules could be connected in series continuously or discontinuously i e a purification element that was not the uv ozone oxidation removal module could be inserted between two adjacent modules 0028 fig1 shows a block diagram of an oxidation removal module 13 for removing organic compounds from waste water in a preferred embodiment according to the present invention 0029 fig2 shows a block diagram of an oxidation removal module 15 for removing organic compounds from waste water in another preferred embodiment according to the present invention 0030 fig3 shows a.