{"id":1863,"date":"2026-06-16T05:49:45","date_gmt":"2026-06-16T05:49:45","guid":{"rendered":"http:\/\/mingyu.njfmz.com\/?post_type=case&#038;p=1863"},"modified":"2026-06-23T01:56:04","modified_gmt":"2026-06-23T01:56:04","slug":"%e6%b0%b8%e5%b7%9e%e6%9f%90%e7%b2%be%e7%bb%86%e5%8c%96%e5%b7%a5%e5%ba%9f%e6%b0%b4%e5%a4%84%e7%90%86%e5%b7%a5%e7%a8%8b","status":"publish","type":"case","link":"https:\/\/www.mingyuhb.com\/en\/case\/%e6%b0%b8%e5%b7%9e%e6%9f%90%e7%b2%be%e7%bb%86%e5%8c%96%e5%b7%a5%e5%ba%9f%e6%b0%b4%e5%a4%84%e7%90%86%e5%b7%a5%e7%a8%8b\/","title":{"rendered":"Yongzhou Fine Chemical Wastewater Treatment Project"},"content":{"rendered":"<p><strong>Project Overview<\/strong><\/p>\n<ul>\n<li>Located in Fenghuangyuan Industrial Park, Lengshuitan, Yongzhou, the company specializes in three major series of natural essential oils\u2014litsea cubeba oil, natural citral, and citronella oil\u2014comprising over 20 products. The company's products hold international certifications including FDA and EU REACH, and are exported to more than ten countries across Europe, the Americas, and Southeast Asia, with an annual processing capacity exceeding 1,500 tons of essential oils.<\/li>\n<li>The project is designed with a wastewater treatment capacity of 32 m\u00b3\/d, with equipment installation and commissioning now completed.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><strong>Key Technical Challenges<\/strong><\/p>\n<ul>\n<li>The wastewater contains natural essential oils, terpenes, organic acids, and residual organics from extraction processes, exhibiting significant fluctuations in COD, color intensity, and odors. Some aromatic components are bacteriostatic, resulting in poor biodegradability.<\/li>\n<li>Distillation residues and high-strength extraction wastewater contain extremely high pollutant concentrations, requiring strict source-segregation and separate pretreatment to prevent shock loading of the biological system that could lead to non-compliant effluent.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><strong>Process Flow<\/strong><\/p>\n<ul>\n<li>Production wastewater: Production wastewater \u2192 Manual Bar Screen \u2192 Production Wastewater Collection Tank \u2192 Oil-Water Separator \u2192 DAF System \u2192 pH Adjustment Tank \u2192 Iron-Carbon Micro-Electrolysis \u2192 Neutralization &amp; Sedimentation Tank \u2192 Biochemical Feed Tank<\/li>\n<li>Other low-concentration wastewater: Other low-concentration wastewater \u2192 Biochemical Feed Tank<\/li>\n<li>Combined wastewater: Biochemical Feed Tank \u2192 High-Efficiency Anaerobic Reactor \u2192 A\/O Tank \u2192 MBR Tank \u2192 Ozone Oxidation Tank \u2192 Clear Water Tank \u2192 Industrial Park WWTP<\/li>\n<\/ul>","protected":false},"featured_media":2092,"parent":0,"menu_order":32,"template":"","format":"standard","categories":[4],"class_list":["post-1863","case","type-case","status-publish","format-standard","has-post-thumbnail","hentry","categories-specialty-chemical-effluent"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.mingyuhb.com\/en\/wp-json\/wp\/v2\/case\/1863","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mingyuhb.com\/en\/wp-json\/wp\/v2\/case"}],"about":[{"href":"https:\/\/www.mingyuhb.com\/en\/wp-json\/wp\/v2\/types\/case"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.mingyuhb.com\/en\/wp-json\/wp\/v2\/media\/2092"}],"wp:attachment":[{"href":"https:\/\/www.mingyuhb.com\/en\/wp-json\/wp\/v2\/media?parent=1863"}],"wp:term":[{"taxonomy":"categories","embeddable":true,"href":"https:\/\/www.mingyuhb.com\/en\/wp-json\/wp\/v2\/categories?post=1863"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}