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  • BSI
    BS EN ISO 20136:2020 Leather. Determination of degradability by micro-organisms
    Edition: 2020
    $418.55
    / user per year

Description of BS EN ISO 20136:2020 2020

This document specifies a test method to determine the degree and rate of aerobic biodegradation of hides and skins of different animal origin, whether they are tanned or not, through the indirect determination of CO2 produced by the degradation of collagen.

The test material is exposed to an inoculum (activated sludge from tannery wastewater) in an aqueous medium. If there is not a tannery nearby then urban wastewater can be used as the inoculum.

The conditions established in this document correspond to optimum laboratory conditions to achieve the maximum level of biodegradation. However, they might not necessarily correspond to the optimum conditions or maximum level of biodegradation in the natural medium.

In general, the experimental procedure covers the determination of the degradation degree and rate of the material under controlled conditions, which allows the analysis of the evolved carbon dioxide produced throughout the test. For this purpose, the testing equipment complies with strict requirements with regard to flow, temperature and agitation control.

This method applies to the following materials:

  1. natural polymers of animal stroma (animal tissue/skins);

  2. animal hides and skins tanned (leather) using organic or inorganic tanning agents;

  3. leathers that, under testing conditions, do not inhibit the activity of microorganisms present in the inoculum.



Standard NumberBS EN ISO 20136:2020
TitleLeather. Determination of degradability by micro-organisms
StatusDefinitive
Publication Date2020-07-21
ReplacesBS EN ISO 20136:2017
Identical National Standard OfEN ISO 20136, ISO 20136:2020
DescriptorsLeather, Test methods, Hides, Degradation, Microorganisms
ICS59.140.30 Leather and furs
CommitteeTCI/69
ISBN978 0 539 01105 0
PublisherBSI
Pages34

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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