{"id":6142,"date":"2024-01-12T15:25:21","date_gmt":"2024-01-12T06:25:21","guid":{"rendered":"https:\/\/www.boken.or.jp\/english\/?p=6142"},"modified":"2024-01-12T15:25:21","modified_gmt":"2024-01-12T06:25:21","slug":"microfiber-release-quantitative-qualitative-biodegradability-environmental-toxicity-evaluation","status":"publish","type":"post","link":"https:\/\/www.boken.or.jp\/english\/latest-news\/6142\/","title":{"rendered":"Microfiber Release Quantitative\/Qualitative\/Biodegradability\/Environmental Toxicity Evaluation"},"content":{"rendered":"\t\t
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This standard is a standardized evaluation method for classifying fiber products based on their environmental impact, especially during the washing process, with regard to microfiber (fiber debris). In this method, fiber products are classified based on the perspective of fiber release (release of fiber debris) during the washing process, using an appropriate analysis system. To simulate the environmental conditions of wastewater treatment plants, the biodegradability in wastewater is tested, and the degree of decomposition within a specified period is measured to classify the degree of decomposition of fiber products (fiber debris). Finally, appropriate environmental toxicity tests are conducted to determine the toxicity of fiber residues after the biodegradation process.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Standard Number<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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DIN SPEC 4872: 2023-02<\/p>

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    Standard Title<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Determination of fibre release during washing and aerobic degradation level in aqueous medium in consideration of ecotoxicity<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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    Summary<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    To determine the environmental impact of fiber products during washing, the following tests are conducted:<\/span><\/p>

    1.Fiber release (fiber debris) analysis: The washing process follows the TMC method\/AATCC TM212.
    <\/strong>\u30fbQuantification of fiber debris (cellulosic fibers\/synthetic fibers).
    \u30fbAverage length and length distribution of fiber debris using a Dynamic Image Analyzer.<\/p>

    2.Biodegradability evaluation<\/strong>
    \u30fbMeasurement of biodegradability in aquatic media (compliant with DIN EN ISO 14851).
    \u30fbActivated sludge is used as the medium.
    \u30fbMeasurement period is up to 2 months.
    \u30fbMeasurement of oxygen consumption using a closed respirometer.<\/p>

    3.Environmental toxicity evaluation<\/strong>
    \u30fbConducted using samples from the test in 2.
    \u30fbEvaluation method based on DIN EN ISO 20079.
    \u30fbUsing duckweed, evaluation is based on the number of mature duckweed leaves and dry mass.<\/p>

    4.Overall test scheme<\/span><\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    Classification<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Fiber Release Classification<\/p>
    Classification<\/td>Fiber Release
    (Fiber Quantity\/Fiber Material 1g)<\/td><\/tr>
    A<\/td>x <\/em>< 1,500<\/td><\/tr>
    B<\/td>1,500 \u2264 x <\/em>< 6,000<\/td><\/tr>
    C<\/td>x <\/em>\u2265 6,000<\/td><\/tr><\/tbody><\/table>

    Biodegradation Level Classification<\/p>
    Classification<\/td>Biodegradation Level
    (Maximum 2 months:%)<\/td><\/tr>
    1<\/td>x > 80<\/td><\/tr>
    2<\/td>40 < x \u2264 80<\/td><\/tr>
    3<\/td>5 \u2264 x \u2264 40<\/td><\/tr>
    4<\/td>x < 5<\/td><\/tr><\/tbody><\/table>

    Environmental Toxicity Impact Classification<\/p>
    Classification<\/td>Environmental Toxicity Impact<\/td><\/tr>
    \u300cT\u300d<\/td>Environmental Toxicity<\/td><\/tr>
    \u00a0<\/td>No Environmental Toxicity<\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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    Contact Us<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    English Contact Form<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

    This standard is a standardized evaluation method for classifying fiber products based on their environmental … more<\/span><\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[275],"tags":[],"class_list":["post-6142","post","type-post","status-publish","format-standard","hentry","category-latest-news"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.boken.or.jp\/english\/wp-json\/wp\/v2\/posts\/6142","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.boken.or.jp\/english\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.boken.or.jp\/english\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.boken.or.jp\/english\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.boken.or.jp\/english\/wp-json\/wp\/v2\/comments?post=6142"}],"version-history":[{"count":22,"href":"https:\/\/www.boken.or.jp\/english\/wp-json\/wp\/v2\/posts\/6142\/revisions"}],"predecessor-version":[{"id":6259,"href":"https:\/\/www.boken.or.jp\/english\/wp-json\/wp\/v2\/posts\/6142\/revisions\/6259"}],"wp:attachment":[{"href":"https:\/\/www.boken.or.jp\/english\/wp-json\/wp\/v2\/media?parent=6142"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.boken.or.jp\/english\/wp-json\/wp\/v2\/categories?post=6142"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.boken.or.jp\/english\/wp-json\/wp\/v2\/tags?post=6142"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}