Biodegradation Testing

ISO 13641-1 :

Water quality — Determination of inhibition of gas production of anaerobic bacteria — Part

General test :

ISO 13641-1:2003 is a valuable screening method for assessing the potential toxicity of substances, mixtures, surface waters, groundwaters, wastewaters, effluents, sludges, and other environmental samples. The test focuses on determining the production of biogas (carbon dioxide and methane) from the anaerobic digestion of sewage sludge over a period of up to 3 days. It provides crucial insights into the effects of various substances on anaerobic bacteria gas production, essential for evaluating water quality.

Anaerobic Environment :

The test mimics anaerobic conditions where bacteria thrive without oxygen. As anaerobic bacteria grow at a slower rate compared to aerobic microorganisms, the test periods are longer.

Broad Applicability :

This method is suitable for testing substances soluble or insoluble in water, including volatile chemicals. However, compounds with low water-solubility require special care, and alternative methods may be more appropriate in such cases.

Predictive Information :

ISO 13641-1:2003 offers insights into how a test material may impact biogas production in anaerobic digesters. Longer tests can indicate potential adaptation of microorganisms to the test material or the build-up of compounds adsorbed onto sludge to toxic concentrations over an extended period.

This information aids in making informed decisions to ensure the protection and sustainable management of water resources.

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