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  • BSI
    BS ISO 13641-1:2003 Water quality. Determination of inhibition of gas production of anaerobic bacteria - General test
    Edition: 2014
    $411.69
    / user per year

Description of BS ISO 13641-1:2003 2014

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 the anaerobic digestion of sewage sludge over periods of up to 3 days. The growth rate of anaerobic bacteria is much lower compared with that of aerobic microorganisms. For this reason, the test periods are longer for anaerobic methods than those used for aerobic bacteria.

This method is applicable to substances, soluble or insoluble in water, including volatile chemicals (see Reference [1] in the Bibliography).

NOTE Special care is necessary with compounds of low water-solubility, and in these cases, see for example, ISO 10634. For general information on biotesting see ISO 5667-16[2].

This method can provide information that is useful in predicting the likely effect of a test material on biogas production in anaerobic digesters. For example, only longer tests, which simulate working digesters more closely can indicate whether adaptation of the microorganisms to the test material can occur or whether compounds likely to be adsorbed onto sludge can build up to a toxic concentration over a longer period than allowed in this test.

Information obtained by this part of ISO 13641 can also be helpful in choosing suitable initial mass concentrations for anaerobic biodegradability tests (e.g. ISO 11734). However, this part of ISO 13641 using undiluted sludge is less suitable for testing dilute digesting sludge than the method described in Part 2 of ISO 13641 where the mass concentrations are a hundredfold more dilute.



Standard NumberBS ISO 13641-1:2003
TitleWater quality. Determination of inhibition of gas production of anaerobic bacteria - General test
StatusConfirmed
Publication Date2014-03-31
Identical National Standard OfISO 13641-1:2003
DescriptorsWater, Organism-activity determination, Anaerobic bacteria, Water testing, Carbon dioxide, Effluents (sewage), Sludge, Sewage, Quality, Toxic gases, Methane, Biological analysis and testing
ICS13.060.70 Examination of biological properties of water
CommitteeEH/3/5
ISBN978 0 580 86078 2
PublisherBSI
Pages24

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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