En fonction des diff\u00e9rentes \u00e9tapes du tannage du cuir (pr\u00e9paration, tannage et finition), les sources d'eaux us\u00e9es de tannage peuvent \u00eatre class\u00e9es en trois cat\u00e9gories :<\/p>\n\n\n\n
1. Au cours de la phase pr\u00e9paratoire, les eaux us\u00e9es proviennent principalement du lavage, du trempage, de l'\u00e9pilation, du chaulage, du d\u00e9chaulage, de l'adoucissement et du d\u00e9graissage ; les principaux polluants sont les d\u00e9chets organiques, les d\u00e9chets inorganiques et les compos\u00e9s organiques.<\/p>\n\n\n\n
2. Au stade du tannage, les eaux us\u00e9es proviennent principalement des processus de lavage, de d\u00e9capage et de tannage ; les principaux polluants sont les sels inorganiques et le chrome, un m\u00e9tal lourd.<\/p>\n\n\n\n
3. Au stade de la finition, les eaux us\u00e9es proviennent principalement des processus de lavage, d'essorage, de teinture, d'encollage et de d\u00e9poussi\u00e9rage ; les polluants comprennent les colorants, les huiles et les compos\u00e9s organiques.<\/p>\n\n\n\n
Par cons\u00e9quent, les eaux us\u00e9es de tannage se caract\u00e9risent par un volume important, des fluctuations significatives de la qualit\u00e9 et de la quantit\u00e9 de l'eau, une charge polluante \u00e9lev\u00e9e, une alcalinit\u00e9 \u00e9lev\u00e9e, une couleur \u00e9lev\u00e9e, une teneur \u00e9lev\u00e9e en mati\u00e8res en suspension, une biod\u00e9gradabilit\u00e9 relativement bonne et un certain degr\u00e9 de toxicit\u00e9.<\/p>","protected":false},"excerpt":{"rendered":"
Depending on the different stages of leather tanning (preparation, tanning, and finishing), tanning wastewater sources can be broadly categorized into three types: 1. In the preparatory stage, wastewater mainly originates from washing, soaking, hair removal, liming, deliming, softening, and degreasing; the main pollutants include organic waste, inorganic waste, and organic compounds. 2. In the tanning…<\/p>","protected":false},"author":1,"featured_media":1864,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[1,32],"tags":[757],"class_list":["post-2281","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-categorized","category-waste-water-treatment-news","tag-tanning-wastewater-characterized"],"_links":{"self":[{"href":"https:\/\/www.luckywwtp.com\/fr\/wp-json\/wp\/v2\/posts\/2281","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.luckywwtp.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.luckywwtp.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.luckywwtp.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.luckywwtp.com\/fr\/wp-json\/wp\/v2\/comments?post=2281"}],"version-history":[{"count":1,"href":"https:\/\/www.luckywwtp.com\/fr\/wp-json\/wp\/v2\/posts\/2281\/revisions"}],"predecessor-version":[{"id":2282,"href":"https:\/\/www.luckywwtp.com\/fr\/wp-json\/wp\/v2\/posts\/2281\/revisions\/2282"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.luckywwtp.com\/fr\/wp-json\/wp\/v2\/media\/1864"}],"wp:attachment":[{"href":"https:\/\/www.luckywwtp.com\/fr\/wp-json\/wp\/v2\/media?parent=2281"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.luckywwtp.com\/fr\/wp-json\/wp\/v2\/categories?post=2281"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.luckywwtp.com\/fr\/wp-json\/wp\/v2\/tags?post=2281"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}