Norm

NEN-ISO 13641-2:2003 en

Water - Bepaling van de remming van activiteit van anaërobe bacteriën - Deel 2: Beproeving bij lage biomassaconcentratie

73,12

Over deze norm

Status Definitief
Aantal pagina's 13
Gepubliceerd op 01-07-2003
Taal Engels
This part of ISO 13641 specifies a screening method for assessing the potential toxicity of substances, mixtures, surface waters, groundwaters and wastewaters, effluents, sludges, or other environmental samples by determining the production of biogas (carbon dioxide and methane) from muds, sediments and other anaerobic environments with low biomass concentration. The growth rate of anaerobic bacteria is much lower, compared with that of aerobic microorganisms. For this reason, the test periods in anaerobic methods are longer than in those with aerobic bacteria. The conditions of this test (for example amount of inoculum and substrate in the test bottles) were adopted to a defined test period over several days. The inoculum can be collected from anaerobic sediments or from large, or laboratory scale, anaerobic digesters. This method is applicable to materials, soluble or insoluble in water, including volatile chemicals (see Reference [1] in the Bibliography).

Details

ICS-code 13.060.70
Nederlandse titel Water - Bepaling van de remming van activiteit van anaërobe bacteriën - Deel 2: Beproeving bij lage biomassaconcentratie
Engelse titel Water quality - Determination of inhibition of gas production of anaerobic bacteria - Part 2: Test for low biomass concentrations

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