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<p>ISO 18749:2004 specifies a screening test method for the determination of the degree of adsorption of substances on to the activated sludge or primary sludge in a waste water treatment plant.</p>
<p>The conditions described in this International Standard normally correspond to the optimum conditions for the adsorption to occur at the chosen activated-sludge concentration and water hardness during the test period.</p>
<p>The method applies to substances for which an analytical method with sufficient accuracy is available and which, under the conditions of the test and at the test concentration used,</p>
<ol><li>are water-soluble;</li><li>or, if only slightly water-soluble, allow sufficiently stable suspensions, dispersions or emulsions to be prepared;</li><li>are not significantly removed from the test solution during the test by known abiotic processes such as stripping or foaming;</li><li>do not deflocculate activated sludge;</li><li>are not readily biodegradable.</li></ol>
Reģistrācijas numurs (WIID)
33631
Darbības sfēra
<p>ISO 18749:2004 specifies a screening test method for the determination of the degree of adsorption of substances on to the activated sludge or primary sludge in a waste water treatment plant.</p>
<p>The conditions described in this International Standard normally correspond to the optimum conditions for the adsorption to occur at the chosen activated-sludge concentration and water hardness during the test period.</p>
<p>The method applies to substances for which an analytical method with sufficient accuracy is available and which, under the conditions of the test and at the test concentration used,</p>
<ol><li>are water-soluble;</li><li>or, if only slightly water-soluble, allow sufficiently stable suspensions, dispersions or emulsions to be prepared;</li><li>are not significantly removed from the test solution during the test by known abiotic processes such as stripping or foaming;</li><li>do not deflocculate activated sludge;</li><li>are not readily biodegradable.</li></ol>
