{"id":5127,"date":"2026-10-09T11:29:10","date_gmt":"2026-10-09T04:29:10","guid":{"rendered":"https:\/\/koastal-eco.com\/site\/?p=5127"},"modified":"2026-10-09T11:29:10","modified_gmt":"2026-10-09T04:29:10","slug":"physical-chemical-treatment-process","status":"publish","type":"post","link":"https:\/\/koastal-eco.com\/site\/physical-chemical-treatment-process\/","title":{"rendered":"Physical &#8211; Chemical treatment process"},"content":{"rendered":"<div class=\"wpb-content-wrapper\" id=\"wpb-content-root\"><p>[vc_row][vc_column][vc_column_text css=&#8221;&#8221; css_params=&#8221;&#8221;]<\/p>\n<p class=\"isSelectedEnd\"><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_88 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/koastal-eco.com\/site\/physical-chemical-treatment-process\/#COAGULATION_AND_FLOCCULATION_PROCESS\" >COAGULATION AND FLOCCULATION PROCESS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/koastal-eco.com\/site\/physical-chemical-treatment-process\/#SEDIMENTATION_TANK\" >SEDIMENTATION TANK<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/koastal-eco.com\/site\/physical-chemical-treatment-process\/#DAF_TANK\" >DAF TANK<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"COAGULATION_AND_FLOCCULATION_PROCESS\"><\/span>COAGULATION AND FLOCCULATION PROCESS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>In coagulation and flocculation tank, wastewater is allowed to react with coagulants and flocculants, respectively (with appropriate concentration determined by Jar testing). These chemicals reduce the stability of colloidal particles in water, which enables the particles to interact with each other to form larger flocs. As a result, the process provides a good condition for sedimentation and floatation in respectively downstream sedimentation tanks or DAF tanks. The removal of flocs from wastewater in sedimentation tanks and DAF tanks is implemented using density differences.<\/p>\n<p>This process is often applied to remove color, suspended solids, certain heavy metals as well as parts of organic pollutant in wastewater.<\/p>\n<p>Koastal Eco utilizes the coagulation and flocculation process in most industrial wastewater treatment plants.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"SEDIMENTATION_TANK\"><\/span>SEDIMENTATION TANK<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Sedimentation tank is operated according to gravity settling to separate suspended solids or flocs created from coagulation and flocculation tank. Settled sludge collected by sludge collection hopper will be pumped to the sludge treatment system while treated wastewater will overflow to the next treatment unit.<\/p>\n<p>Types of sedimentation tanks commonly used:<\/p>\n<ul>\n<li>Circular tank (with bottom scraper)<\/li>\n<li>Rectangular tank (with bottom scraper)<\/li>\n<li>Hopper bottom tank (for small flowrate projects)<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/koastal-eco.com.vn\/UserFile\/editor\/images\/TinTuc\/1-1.jpg\" alt=\"\" data-cke-saved-src=\"\/UserFile\/editor\/images\/TinTuc\/1-1.jpg\" \/><br \/>\nCircular sedimentation tank<\/p>\n<h2><span class=\"ez-toc-section\" id=\"DAF_TANK\"><\/span>DAF TANK<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Sedimentation tank separates suspended solids or flocs by gravity settling mechanism, and DAF tank removes them by floatation mechanism. Wastewater, after going through a flocculation tank, is compressed at high pressure (3-4 atm), then reduced to atmospheric pressure in DAF tank. The dissolved air separated from wastewater forms fine air bubbles, which will adhere to the suspended solids in the wastewater and cause them to float to the surface. They will be then removed by a skimming device.<\/p>\n<p>In wastewater treatment, DAF tank is used to remove fat, oil, grease, suspended solids, surfactants, and low-density solids (pulp and paper, rubber industry, etc.). Koastal Eco has applied DAF tank with the capacity up to 8,000 m3\/day.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/koastal-eco.com.vn\/UserFile\/editor\/images\/TinTuc\/2.jpg\" alt=\"\" data-cke-saved-src=\"\/UserFile\/editor\/images\/TinTuc\/2.jpg\" \/><br \/>\nDissolved Air Flotation DAF[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>[vc_row][vc_column][vc_column_text css=&#8221;&#8221; css_params=&#8221;&#8221;] COAGULATION AND FLOCCULATION PROCESS In coagulation and flocculation tank, wastewater is allowed to react with coagulants and flocculants, respectively (with appropriate concentration determined by Jar testing). These chemicals reduce the stability of colloidal particles in water, which enables the particles to interact with each other to form larger flocs. As a result, [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":3506,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"rs_blank_template":"","rs_page_bg_color":"","slide_template_v7":"","footnotes":""},"categories":[276],"tags":[],"class_list":["post-5127","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technology"],"acf":[],"featured_image_src":{"landsacpe":["https:\/\/koastal-eco.com\/site\/wp-content\/uploads\/2020\/12\/video-1-1140x445.png",1140,445,true],"list":["https:\/\/koastal-eco.com\/site\/wp-content\/uploads\/2020\/12\/video-1-463x348.png",463,348,true],"medium":["https:\/\/koastal-eco.com\/site\/wp-content\/uploads\/2020\/12\/video-1-300x165.png",300,165,true],"full":["https:\/\/koastal-eco.com\/site\/wp-content\/uploads\/2020\/12\/video-1.png",1224,672,false]},"_links":{"self":[{"href":"https:\/\/koastal-eco.com\/site\/wp-json\/wp\/v2\/posts\/5127","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/koastal-eco.com\/site\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/koastal-eco.com\/site\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/koastal-eco.com\/site\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/koastal-eco.com\/site\/wp-json\/wp\/v2\/comments?post=5127"}],"version-history":[{"count":2,"href":"https:\/\/koastal-eco.com\/site\/wp-json\/wp\/v2\/posts\/5127\/revisions"}],"predecessor-version":[{"id":5129,"href":"https:\/\/koastal-eco.com\/site\/wp-json\/wp\/v2\/posts\/5127\/revisions\/5129"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/koastal-eco.com\/site\/wp-json\/wp\/v2\/media\/3506"}],"wp:attachment":[{"href":"https:\/\/koastal-eco.com\/site\/wp-json\/wp\/v2\/media?parent=5127"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/koastal-eco.com\/site\/wp-json\/wp\/v2\/categories?post=5127"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/koastal-eco.com\/site\/wp-json\/wp\/v2\/tags?post=5127"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}