Shock loading management

Outlet monitoring allows controlling the impact of the shock load on the treatment plant and, if necessary, to divert the outlet effluent into a storage tank for a further 

In case of shock loads, a procedure has been proposed and is schematised in Fig. 24. It takes into account the treatability diagnosis (photodegradation test), the management of an undetected incident on upstream effluent and the limits of UV spectrophotometry (nonabsorbing compounds). 

Finally, it can be noticed in Fig. 24 that five cases can be observed according to the differences between inlet and outlet UV spectra, leading to different yields. The following applications will illustrate the different situations. 

Case 1 presents a significant absorbance decrease corresponding to high organic load abatement UV spectra (Si and So) are regular. 

Case 2 shows similar UV spectra, even if the yield is medium. It can be explained by the presence of nonabsorbing compounds that are partially degraded. The limits of the 

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Figure 23. General procedure for shock load management (A detection and storage of the suspect effluent, a B treatment of effluent with a dilution factor, d).

Figure 24. Proposed procedure synopsis for shock load management (Si and So are the concentration (e.g. TOC) at the inlet and outlet of the plant, respectively, and yr the efficiency yield of the process).

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