Water quality. Determination of inhibition of gas production of anaerobic bacteria - General test subscription-only Welders/ fabricators

Welders/ fabricators

A uniform standard coding system complying with BS EN 13508-2 ensures that results from visual inspections can be compared

— Case 1 — resistance welding in contracts which require the manufacturer or sub-contractor to have a quality system in accordance with ISO 9001

7 Technical specification

a) the test piece or product tested is large enough for the hardness instrument to rest upon it

Water quality. Determination of inhibition of gas production of anaerobic bacteria - General test subscription-only Welders/ fabricators1 Scope 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