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180415 ||| eng |
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|a 9789264284029
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| 245 |
0 |
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|a Test No. 244: Protozoan Activated Sludge Inhibition Test
|h Elektronische Ressource
|c Organisation for Economic Co-operation and Development
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| 246 |
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|a Essai no. 244 : Essai d'inhibition des protozoaires des boues activées
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| 260 |
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|a Paris
|b OECD Publishing
|c 2017
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| 300 |
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|a 14 p
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| 653 |
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|a Environment
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| 710 |
2 |
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|a Organisation for Economic Co-operation and Development
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| 041 |
0 |
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|a eng
|2 ISO 639-2
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| 989 |
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|b OECD
|a OECD Books and Papers
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| 490 |
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|a OECD Guidelines for the Testing of Chemicals, Section 2
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| 028 |
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|a 10.1787/9789264284029-en
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| 856 |
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|a oecd-ilibrary.org
|u https://doi.org/10.1787/9789264284029-en
|x Verlag
|3 Volltext
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| 082 |
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|a 363
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| 520 |
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|a This Test Guideline describes a method to assess effects of a test chemical on the phagocytotic activity of activated sludge containing protozoan organisms under defined conditions in the presence of different concentrations of the test chemical. The principle of biological sewage-treatment plants (STP) is to transform the organic matter of incoming waste-water in microbial biomass, which in turn is separated from the liquid yielding a purified effluent. The purpose of the test is to provide a means to record effects of test chemicals on ciliated protozoa in sewage treatment plants, which due to their grazing on bacteria considerably contribute to the functioning of STPs
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