Solid Radioactive Waste Strategy Report.pdf - UK EPR
Solid Radioactive Waste Strategy Report.pdf - UK EPR
Solid Radioactive Waste Strategy Report.pdf - UK EPR
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<strong>EPR</strong> <strong>UK</strong><br />
N° NESH-G/2008/en/0123<br />
REV. A PAGE 59 / 257<br />
FIGURE 11: EVAPORATOR USED FOR LIQUID EFFLUENT TREATMENT<br />
7.3.2 Liquid Effluent Treatment By Biological Treatment<br />
Biological liquid effluent treatment can be used as a pre treatment step for liquid effluent<br />
containing a high concentration of detergents and/or organic materials; for example laundry<br />
effluent or shower arisings [Ref.37].<br />
Biological liquid effluent treatment results in the removal of the majority of the organic<br />
radioactive and non-radioactive waste constituents. Typically biological treatment is performed<br />
under aerobic conditions. Bacterial action is used to decompose the biodegradable<br />
consitituents of the liquid effluent into carbon monoxide and carbon dioxide.<br />
Following completion of the treatment the bacteria sludge generated is treated using a separator<br />
to extract the bacteria into a concentrated sludge. The bacteria are then treated using hydrogen<br />
peroxide prior to transfer of the residual material to other systems. There is no transfer of<br />
bacteria to other systems.<br />
Following treatment the effluent can be directly discharged or routed for further treatment. The<br />
remaining concentrate contains primarily mineralised residuals that require further conditioning<br />
prior to final disposal.<br />
Application<br />
Treatment of all types of liquid effluent, primarily used for liquid effluent containing undissolved<br />
solids such as laundry water, drains from showers and sinks, sump water, regenerants, etc.
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