{"id":319,"date":"2026-07-08T15:36:52","date_gmt":"2026-07-08T07:36:52","guid":{"rendered":"https:\/\/www.rubri.cn\/indie_testimonial\/v2-case-9\/"},"modified":"2026-10-27T07:18:13","modified_gmt":"2026-10-26T23:18:13","slug":"high-salt-cod-ammonium-separation-pharma-4m3h","status":"publish","type":"indie_testimonial","link":"https:\/\/www.rubri.cn\/en\/indie_testimonial\/high-salt-cod-ammonium-separation-pharma-4m3h\/","title":{"rendered":"Electrodialysis (ED) for a 4 m3\/h high-salinity COD and ammonium sulfate separation project at a pharmaceutical company"},"content":{"rendered":"<p>Electrodialysis (ED) for a 4 m3\/h high-salinity COD and ammonium sulfate separation project at a pharmaceutical company, used to show the treatment scale and operating indicators of this technical route in similar projects.<\/p>\n<h2>Key indicators<\/h2>\n<ul>\n<li>Treatment capacity: 4m3\/h<\/li>\n<li>Salt content is about 45g\/L<\/li>\n<\/ul>\n<h2>Project background<\/h2>\n<p>Pharmaceutical production wastewater often contains both high-concentration inorganic salts and recalcitrant organic matter, and salts such as ammonium sulfate have recovery value.<\/p>\n<p>If evaporation crystallization is performed directly, organic matter will precipitate together with the salt, resulting in insufficient purity of the salt product and requiring disposal as hazardous waste.<\/p>\n<p>The project objective is to separate salt from organic matter before crystallization so that the salt phase meets the conditions for resource recovery.<\/p>\n<h2>Process route<\/h2>\n<ul>\n<li>With electrodialysis (ED) as the core process, anions and cations are driven to migrate directionally under a direct-current electric field and enter the concentrate chamber.<\/li>\n<li>Through the selective permeability of the ion-exchange membrane, inorganic salts such as ammonium sulfate are enriched in the concentrate chamber, while COD components remain mainly in the diluate chamber.<\/li>\n<li>Influent is pretreated to control suspended solids and hardness and prevent membrane surface scaling and fouling from affecting stable operation.<\/li>\n<li>The salt solution on the concentrate side can be connected to the evaporation crystallization process, while organic matter on the diluate side enters biological treatment or advanced oxidation treatment.<\/li>\n<\/ul>\n<h2>Configuration scale<\/h2>\n<ul>\n<li>Treatment capacity: 4 m\u00b3\/h.<\/li>\n<\/ul>\n<h2>Illustrative materials<\/h2>\n<div class=\"iw-media-grid\">\n<figure><img decoding=\"async\" width=\"778\" height=\"476\" src=\"\/wp-content\/uploads\/2026\/07\/v2-dda885ad7b86.jpeg\" class=\"attachment-large size-large\" alt=\"\u7535\u6e17\u6790\u7528\u4e8e\u67d0\u5236\u836f\u4f01\u4e1a4\u65b9\/h\u9ad8\u76d0COD\u4e0e\u786b\u9178\u94f5\u5206\u79bb\u9879\u76ee\" loading=\"lazy\" \/><figcaption>Illustration of electrodialysis (ED) for a 4 m3\/h high-salinity COD and ammonium sulfate separation project at a pharmaceutical company<\/figcaption><\/figure>\n<\/div>","protected":false},"featured_media":133,"menu_order":90,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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