Alexander Szabo and Oscar Engle - Svenskt Vatten
Alexander Szabo and Oscar Engle - Svenskt Vatten
Alexander Szabo and Oscar Engle - Svenskt Vatten
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Figure 6.4: Map over recipient with upstream collection points (1) <strong>and</strong> downstream collection points<br />
(2) (<strong>Szabo</strong> & <strong>Engle</strong>, 2010).<br />
Results <strong>and</strong> discussion<br />
<br />
Figure 6.5: The water quality upstream <strong>and</strong> downstream of WSP on the 14 th of January 2010.<br />
The COD <strong>and</strong> TSS levels are lower downstream of the WSP (Figure 6.5). The stream has not<br />
received any effluent from any kind of treatment facility before passing the WSP. The initial<br />
COD may origin from pollution caused by living organisms such as fishes, birds <strong>and</strong> algae. The<br />
high TSS increase downstream may be the result of the treated waste water, but also from high<br />
concentration of algae <strong>and</strong> bottom sediments stirred up in the stream.<br />
Due to limitations in time <strong>and</strong> the cost for COD reagents, focus has been set on influent <strong>and</strong><br />
effluent water. These values are single analyses of composite samples <strong>and</strong> should only be<br />
considered to give an indication of the changes of pollution levels in the river. To reach a better<br />
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