{"id":35966,"date":"2024-10-01T13:06:04","date_gmt":"2024-10-01T12:06:04","guid":{"rendered":"https:\/\/zlcopenhagen.com\/?p=35966"},"modified":"2026-03-07T14:46:38","modified_gmt":"2026-03-07T13:46:38","slug":"tandboerstens-skjulte-miljoebombe-dtu-afsloerer-sandheden","status":"publish","type":"post","link":"https:\/\/zlcopenhagen.com\/da\/tandboerstens-skjulte-miljoebombe-dtu-afsloerer-sandheden\/","title":{"rendered":"HVAD ER EN LIVSCYKLUSVURDERING (LCA)?"},"content":{"rendered":"<p>[spb_text_block animation=&#8221;none&#8221; animation_delay=&#8221;0&#8243; simplified_controls=&#8221;yes&#8221; custom_css_percentage=&#8221;no&#8221; padding_vertical=&#8221;0&#8243; padding_horizontal=&#8221;0&#8243; margin_vertical=&#8221;0&#8243; custom_css=&#8221;margin-top: 0px;margin-bottom: 0px;&#8221; border_size=&#8221;0&#8243; border_styling_global=&#8221;default&#8221; width=&#8221;1\/1&#8243; el_position=&#8221;first last&#8221;]<\/p>\n<h1>HVAD ER EN LIVSCYKLUSVURDERING (LCA)?<\/h1>\n<p><strong>En livscyklusvurdering (LCA)<\/strong> er en metode til at m\u00e5le et produkts milj\u00f8p\u00e5virkning gennem hele livscyklussen \u2013 fra r\u00e5materialer og produktion til transport, brug og end-of-life.<\/p>\n<p>Det lyder teknisk, men effekten er konkret: LCA afsl\u00f8rer, hvor aftrykket faktisk opst\u00e5r \u2013 og hvor sm\u00e5 designvalg kan give store reduktioner i CO\u2082, spild og ressourceforbrug.<\/p>\n<p>Eksemplet her bygger p\u00e5 et DTU-semesterprojekt p\u00e5 <strong><a href=\"https:\/\/dtu.dk\/uddannelse\/diplomingenioer\/uddannelsesretninger\/produktion\" target=\"_blank\" rel=\"noopener\">diplomingeni\u00f8rretningen Produktion<\/a><\/strong>, hvor vi bruger LCA som metode til at forst\u00e5, hvor i livscyklussen tandb\u00f8rstens milj\u00f8aftryk typisk topper. P\u00e5 en tandb\u00f8rste handler aftrykket sj\u00e6ldent kun om selve plasten \u2014 men om kombinationen af materialemix (skaft + b\u00f8rsteh\u00e5r), emballage pr. enhed, transport i store m\u00e6ngder og at produktet typisk ender som restaffald.<\/p>\n<h2>TANDB\u00d8RSTENS SKJULTE MILJ\u00d8BOMBE<\/h2>\n<p>Selv simple hverdagsprodukter kan have et overraskende stort milj\u00f8aftryk \u2013 tandb\u00f8rsten er et tydeligt eksempel. For at forst\u00e5 <em>hvor<\/em> aftrykket opst\u00e5r, bruger vi LCA som metode \u2013 pr\u00e6cis som vi l\u00e6rer det p\u00e5 DTU.<\/p>\n<h2>LIFE CYCLE ASSESSMENT (LCA) \u2013 EKSEMPEL FRA DTU<\/h2>\n<p>P\u00e5 <strong>Danmarks Tekniske Universitet (DTU)<\/strong> arbejder vi med <strong>Life Cycle Assessment (LCA)<\/strong> som analysemetode til at vurdere et produkts samlede milj\u00f8p\u00e5virkning gennem hele livscyklussen.<\/p>\n<p><strong>Vigtigt:<\/strong> Denne gennemgang er inspireret af undervisningen og metoden \u2013 og er <em>ikke<\/em> en fuld eller offentlig LCA-rapport. Vi deler ingen case-data, men bruger LCA-logikken til at forklare de typiske faser og \u201chotspots\u201d, som ofte driver aftrykket i hverdagsprodukter.<\/p>\n<p>Men f\u00f8r vi kan pege p\u00e5 l\u00f8sninger, skal vi forst\u00e5, hvor milj\u00f8p\u00e5virkningen faktisk opst\u00e5r i tandb\u00f8rstens liv. Det er pr\u00e6cis d\u00e9t, Life Cycle Thinking hj\u00e6lper med: at flytte fokus fra \u201cmateriale alene\u201d til hele k\u00e6den \u2013 fra r\u00e5materialer til end-of-life.<\/p>\n<p>Herunder bruger vi derfor LCA-logikken som ramme og gennemg\u00e5r de mest typiske faser og hotspots, som ofte driver aftrykket for hverdagsprodukter som tandb\u00f8rster.<\/p>\n<h2>HOTSPOTS I TANDB\u00d8RSTENS LIVSCYKLUS<\/h2>\n<p>Hotspots er tandb\u00f8rstens \u201csvage punkter\u201d i livscyklussen: d\u00e9r hvor materialer, energi og transport kan g\u00f8re aftrykket un\u00f8digt h\u00f8jt. Tabellen viser hvor \u2014 og hvad man kan g\u00f8re ved det.<\/p>\n<p>[\/spb_text_block] [spb_blank_spacer height=&#8221;30px&#8221; width=&#8221;1\/1&#8243; el_position=&#8221;first last&#8221;] [spb_text_block animation=&#8221;none&#8221; animation_delay=&#8221;0&#8243; simplified_controls=&#8221;yes&#8221; custom_css_percentage=&#8221;no&#8221; padding_vertical=&#8221;0&#8243; padding_horizontal=&#8221;0&#8243; margin_vertical=&#8221;0&#8243; custom_css=&#8221;margin-top: 0px;margin-bottom: 0px;&#8221; border_size=&#8221;0&#8243; border_styling_global=&#8221;default&#8221; width=&#8221;1\/1&#8243; el_position=&#8221;first last&#8221;]<\/p>\n<table>\n<thead>\n<tr>\n<th>LCA-FASE<\/th>\n<th>HVAD DER SKER<\/th>\n<th>TYPISKE HOTSPOTS<\/th>\n<th>HVAD MAN KAN G\u00d8RE<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>R\u00c5MATERIALER<\/td>\n<td>Materialer udvindes og forarbejdes<\/td>\n<td>Plasttyper, energi til r\u00e5vareproduktion<\/td>\n<td>Materialesubstitution, mindre materialeforbrug<\/td>\n<\/tr>\n<tr>\n<td>PRODUKTION<\/td>\n<td>Fremstilling, st\u00f8bning, samling<\/td>\n<td>El-forbrug, spild, kemikalier<\/td>\n<td>Lean, lavere spild, renere energi<\/td>\n<\/tr>\n<tr>\n<td>TRANSPORT<\/td>\n<td>Transport fra fabrik til marked<\/td>\n<td>Fly vs. skib, pakkefylde<\/td>\n<td>Optimer ruter, undg\u00e5 luftfragt, bedre fyldgrad<\/td>\n<\/tr>\n<tr>\n<td>BRUG<\/td>\n<td>Produktets brugsfase<\/td>\n<td>Udskiftningsfrekvens, levetid<\/td>\n<td>L\u00e6ngere levetid, udskifteligt hoved<\/td>\n<\/tr>\n<tr>\n<td>END-OF-LIFE<\/td>\n<td>Bortskaffelse \/ genanvendelse<\/td>\n<td>Mixed materialer, lav genanvendelighed<\/td>\n<td>Design for adskillelse, mono-materialer, take-back<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>[\/spb_text_block] [spb_blank_spacer height=&#8221;30px&#8221; width=&#8221;1\/1&#8243; el_position=&#8221;first last&#8221;] [spb_text_block animation=&#8221;none&#8221; animation_delay=&#8221;0&#8243; simplified_controls=&#8221;yes&#8221; custom_css_percentage=&#8221;no&#8221; padding_vertical=&#8221;0&#8243; padding_horizontal=&#8221;0&#8243; margin_vertical=&#8221;0&#8243; custom_css=&#8221;margin-top: 0px;margin-bottom: 0px;&#8221; border_size=&#8221;0&#8243; border_styling_global=&#8221;default&#8221; width=&#8221;1\/1&#8243; el_position=&#8221;first last&#8221;]<\/p>\n<h3>LCA-ANALYSEN TRIN FOR TRIN (R\u00c5MATERIALER \u2192 PRODUKTION \u2192 TRANSPORT \u2192 BRUG \u2192 END-OF-LIFE)<\/h3>\n<p>For at g\u00f8re det praktisk bruger vi LCA-strukturen som tjekliste: Hvor ligger hotspots \u2013 og hvilke designgreb flytter mest?\u00a0En LCA-beregning d\u00e6kker normalt alle faser i et produkts liv. I praksis handler det om at f\u00e5 overblik over, hvor p\u00e5virkningen er st\u00f8rst \u2013 og hvor forbedringer giver mest effekt.<\/p>\n<h3>1) R\u00c5MATERIALER: PLAST, FIBRE OG \u201cSKJULTE\u201d INPUT<\/h3>\n<p>Hotspot her handler ofte om materialets oprindelse (fossil vs. genanvendt), materialem\u00e6ngder og hvilke tils\u00e6tningsstoffer der bruges for styrke og holdbarhed.<\/p>\n<ul>\n<li><strong>Typisk forbedring:<\/strong> Reduc\u00e9r materialeforbrug, undg\u00e5 un\u00f8dvendige materialemix, og v\u00e6lg genanvendt input hvor det giver mening.<\/li>\n<\/ul>\n<h3>2) PRODUKTION: ENERGI, SPILD OG PROCESVALG<\/h3>\n<p>Produktion kan blive en stille driver, hvis designet kr\u00e6ver mange dele, mange procestrin eller giver h\u00f8j fejlprocent og omk\u00f8rsler.<\/p>\n<ul>\n<li><strong>Typisk forbedring:<\/strong> Design til f\u00e6rre dele, lavere spild og mere stabil produktion (f\u00e6rre fejl og f\u00e6rre ekstra-processer).<\/li>\n<\/ul>\n<h3>3) TRANSPORT: SM\u00c5 PRODUKTER, STOR VOLUME<\/h3>\n<p>Tandb\u00f8rster fylder lidt pr. enhed, men flyttes ofte i enorme m\u00e6ngder. Her kan emballage, pakningsgrad og rutevalg hurtigt blive et hotspot.<\/p>\n<ul>\n<li><strong>Typisk forbedring:<\/strong> Kompakt emballage, bedre pakningsgrad, f\u00e6rre \u201cluft-kilometer\u201d og kortere ruter hvor muligt.<\/li>\n<\/ul>\n<h3>4) BRUG: LEVETID OG FUNKTIONEL ENHED<\/h3>\n<p>I LCA m\u00e5les et produkt typisk p\u00e5 sin funktion over tid. Jo kortere levetid og jo hurtigere udskiftning, desto h\u00f8jere aftryk pr. brug.<\/p>\n<ul>\n<li><strong>Typisk forbedring:<\/strong> Design til l\u00e6ngere levetid og tydelig vejledning, s\u00e5 produktet bruges som tilt\u00e6nkt.<\/li>\n<\/ul>\n<h3>5) END-OF-LIFE: SORTERING, GENANVENDELSE OG DESIGN FOR ADSKILLELSE<\/h3>\n<p>Mange tandb\u00f8rster ender som restaffald, fordi de er sv\u00e6re at sortere eller best\u00e5r af materialer, der ikke kan adskilles.<\/p>\n<ul>\n<li><strong>Typisk forbedring:<\/strong> F\u00e6rre materialetyper, mindre lim\/sammensmeltning og design til adskillelse eller bedre sortering.<\/li>\n<\/ul>\n<h3>OVERORDNEDE BETRAGTNINGER \u2013 IKKE EN FULD LCA-RAPPORT<\/h3>\n<p>Det vigtigste takeaway er sj\u00e6ldent \u201c\u00e9t perfekt materiale\u201d. Det er helheden: f\u00e6rre materialetyper, enklere design, lavere spild, smartere emballage\/transport og en end-of-life-l\u00f8sning, der faktisk kan fungere i praksis. Det er her, LCA flytter mest.<\/p>\n<h2 data-start=\"0\" data-end=\"41\">SP\u00d8RGSM\u00c5L OM LIVSCYKLUSVURDERING (LCA)<\/h2>\n<p data-start=\"43\" data-end=\"252\"><strong data-start=\"43\" data-end=\"84\">Hvad er en livscyklusvurdering (LCA)?<\/strong><br data-start=\"84\" data-end=\"87\" \/>En livscyklusvurdering (LCA) m\u00e5ler et produkts samlede milj\u00f8p\u00e5virkning gennem hele livscyklussen \u2013 fra r\u00e5materialer og produktion til transport, brug og end-of-life.<\/p>\n<p data-start=\"254\" data-end=\"447\"><strong data-start=\"254\" data-end=\"291\">Hvordan laver man en LCA analyse?<\/strong><br data-start=\"291\" data-end=\"294\" \/>En LCA analyse laves ved at definere funktionel enhed og systemgr\u00e6nser, indsamle data og beregne milj\u00f8p\u00e5virkninger for hver fase i produktets livscyklus.<\/p>\n<p data-start=\"449\" data-end=\"633\" data-is-last-node=\"\" data-is-only-node=\"\"><strong data-start=\"449\" data-end=\"485\">Hvad bruges LCA beregninger til?<\/strong><br data-start=\"485\" data-end=\"488\" \/>LCA beregninger bruges til at sammenligne materialer og l\u00f8sninger, reducere CO\u2082-aftryk og prioritere de designvalg, der giver st\u00f8rst milj\u00f8effekt.<\/p>\n<h2>HVORFOR LCA ER VIGTIG FOR HVERDAGSPRODUKTER<\/h2>\n<p>LCA viser, at selv sm\u00e5 produkter kan have komplekse milj\u00f8aftryk \u2013 og at forbedringer sj\u00e6ldent handler om \u00e9n ting. N\u00e5r man arbejder livscyklisk, kan man prioritere de \u00e6ndringer, der giver st\u00f8rst effekt: materialer, spild, emballage, transport og end-of-life.<\/p>\n<p>Hvis du vil se, hvordan samme LCA-logik kan bruges i mode og produktion, s\u00e5 l\u00e6s ogs\u00e5 vores side om <a href=\"https:\/\/zlcopenhagen.com\/da\/tekstilaffald-tojproduktion\/\"><strong>tekstilaffald i t\u00f8jproduktion<\/strong><\/a>. Vil du have en simpel LCA-tjekliste til hverdagsprodukter? Skriv til os \u2014 s\u00e5 deler vi en kort version af den metode, vi bruger p\u00e5 DTU (uden case-data).<\/p>\n<p>Relateret: <a href=\"https:\/\/zlcopenhagen.com\/da\/plastaffald-dtu-baeredygtighed\/\" target=\"_blank\" rel=\"noopener\"><strong>plastaffald og mikroplast<\/strong><\/a>.<\/p>\n<p>Og hvis du vil dykke ned i regenererede materialer, kan du se vores samarbejde med <a href=\"https:\/\/econyl.aquafil.com\/brands\/zlcopenhagen\/\" target=\"_blank\" rel=\"noopener\"><strong>ECONYL\u00ae<\/strong><\/a>.<\/p>\n<p>[\/spb_text_block] [spb_blank_spacer height=&#8221;30px&#8221; width=&#8221;1\/1&#8243; el_position=&#8221;first last&#8221;] [spb_video title=&#8221;HVAD ER LCA?&#8221; link=&#8221;https:\/\/www.youtube.com\/watch?v=EuqjWQrHe50&#8243; remove_related=&#8221;yes&#8221; autoplay=&#8221;no&#8221; full_width=&#8221;no&#8221; width=&#8221;1\/1&#8243; el_position=&#8221;first last&#8221;]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[spb_text_block animation=&#8221;none&#8221; animation_delay=&#8221;0&#8243; simplified_controls=&#8221;yes&#8221; custom_css_percentage=&#8221;no&#8221; padding_vertical=&#8221;0&#8243; padding_horizontal=&#8221;0&#8243; margin_vertical=&#8221;0&#8243; custom_css=&#8221;margin-top: 0px;margin-bottom: 0px;&#8221; border_size=&#8221;0&#8243; border_styling_global=&#8221;default&#8221; width=&#8221;1\/1&#8243; el_position=&#8221;first last&#8221;] HVAD ER EN LIVSCYKLUSVURDERING (LCA)? En livscyklusvurdering (LCA) er en metode til at m\u00e5le et produkts milj\u00f8p\u00e5virkning gennem hele livscyklussen \u2013 fra r\u00e5materialer og produktion til transport, brug og end-of-life. Det lyder teknisk, men effekten er konkret: LCA afsl\u00f8rer, hvor aftrykket faktisk opst\u00e5r \u2013 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":48342,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1545],"tags":[1611,1614,1612,1615,1613,1610,1616],"class_list":["post-35966","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-baeredygtighed-csr","tag-baeredygtigt-produktdesign","tag-cirkulaer-oekonomi","tag-danmarks-tekniske-universitet","tag-fns-verdensmaal","tag-lca-vaerktoejer","tag-livscyklusvurdering","tag-miljoepaavirkningsanalyse"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.6 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Livscyklusvurdering af en tandb\u00f8rste \u2013 LCA forklaret | DTU<\/title>\n<meta name=\"description\" content=\"Hvad er en livscyklusvurdering (LCA)? Se hvordan milj\u00f8p\u00e5virkningen af en tandb\u00f8rste analyseres gennem materialer, produktion, transport og affald \u2013 baseret p\u00e5 undervisning ved DTU.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/zlcopenhagen.com\/da\/tandboerstens-skjulte-miljoebombe-dtu-afsloerer-sandheden\/\" \/>\n<meta property=\"og:locale\" content=\"da_DK\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ZLCOPENHAGEN: Danish-Punjabi Ethical Menswear\" \/>\n<meta property=\"og:description\" content=\"ZLCOPENHAGEN merges Danish minimalism with Punjabi pride. Ethical menswear with muscle, message, and meaning. Designed with zidd.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/zlcopenhagen.com\/da\/tandboerstens-skjulte-miljoebombe-dtu-afsloerer-sandheden\/\" \/>\n<meta property=\"og:site_name\" content=\"zlcopenhagen.com\" \/>\n<meta property=\"article:published_time\" content=\"2024-10-01T12:06:04+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-03-07T13:46:38+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/zlcopenhagen.com\/wp-content\/uploads\/2016\/06\/1926177_778736705472750_1843377885_o.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1582\" \/>\n\t<meta property=\"og:image:height\" content=\"2048\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"ZLC Team\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Skrevet af\" \/>\n\t<meta name=\"twitter:data1\" content=\"ZLC Team\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimeret l\u00e6setid\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutter\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Livscyklusvurdering af en tandb\u00f8rste \u2013 LCA forklaret | DTU","description":"Hvad er en livscyklusvurdering (LCA)? 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