{"id":278,"date":"2026-07-08T15:36:46","date_gmt":"2026-07-08T07:36:46","guid":{"rendered":"https:\/\/www.rubri.cn\/products\/v2-product-1-1\/"},"modified":"2026-10-27T07:18:12","modified_gmt":"2026-10-26T23:18:12","slug":"ultrafiltration-uf","status":"publish","type":"indie_product","link":"https:\/\/www.rubri.cn\/en\/products\/product-components\/ultrafiltration-uf\/","title":{"rendered":"Ultrafiltration UF"},"content":{"rendered":"<p>Ultrafiltration is a pressure-driven screening membrane separation process. It relies on micropores on the membrane surface to retain suspended solids, colloids, macromolecular organics, and microorganisms, keeping permeate turbidity and SDI stably controlled. It is often used as a pre-barrier for reverse osmosis and nanofiltration systems.<\/p>\n<h2>Separation Principle<\/h2>\n<ul>\n<li>It is mainly based on membrane pore size screening. Pressure on the feed side drives water and small-molecule solutes through the membrane pores, while components larger than the pore size are retained and discharged with the concentrate.<\/li>\n<li>It is a physical separation process at ambient temperature without phase change; it does not introduce chemical reaction agents or change the basic chemical form of the material.<\/li>\n<li>Membrane fouling is mainly controlled through periodic air-water backwash, chemically enhanced backwash (CEB), and chemical cleaning (CIP).<\/li>\n<\/ul>\n<h2>Product Features<\/h2>\n<ul>\n<li>Permeate quality is stable, and effluent turbidity and SDI are controlled, significantly extending the operating cycles of downstream reverse osmosis and nanofiltration membranes.<\/li>\n<li>Hollow fiber, tubular, flat sheet, and multi-leaf configurations are available to suit feed liquids with different solids content and viscosity.<\/li>\n<li>Pressure-resistant and chemical-cleaning-resistant PVDF and PES materials can withstand more frequent backwash and chemical cleaning.<\/li>\n<li>Relatively compact footprint and high degree of automation; can operate in coordination with pretreatment and reverse osmosis systems.<\/li>\n<\/ul>\n<h2>Application Industries<\/h2>\n<ul>\n<li>Pretreatment for purification and reuse of surface water, groundwater, and municipal reclaimed water.<\/li>\n<li>Guard filtration ahead of reverse osmosis and nanofiltration systems, replacing conventional multi-media filtration.<\/li>\n<li>Reuse of industrial wastewater from electroplating, printing and dyeing, and papermaking, and side-stream filtration of circulating cooling water.<\/li>\n<li>Clarification, microbial removal, and separation of process liquids in food and beverage, fermentation, and pharmaceutical applications.<\/li>\n<\/ul>\n<h2>Specifications and Models<\/h2>\n<div class=\"iw-table-wrap\">\n<table class=\"iw-table\">\n<tr>\n<th>Parameter<\/th>\n<th>Unit<\/th>\n<th>Typical value<\/th>\n<\/tr>\n<tr>\n<td>Molecular weight cutoff<\/td>\n<td>Da<\/td>\n<td>1000\u2013500000 (typical value)<\/td>\n<\/tr>\n<tr>\n<td>Membrane material<\/td>\n<td>\u2014<\/td>\n<td>PVDF \/ PES \/ ceramic<\/td>\n<\/tr>\n<tr>\n<td>Operating pressure<\/td>\n<td>MPa<\/td>\n<td>0.05\u20130.30 (typical value)<\/td>\n<\/tr>\n<tr>\n<td>Product water turbidity<\/td>\n<td>NTU<\/td>\n<td>\u2264 0.1 (typical)<\/td>\n<\/tr>\n<tr>\n<td>Effluent SDI\u2081\u2085<\/td>\n<td>\u2014<\/td>\n<td>\u2264 3 (typical)<\/td>\n<\/tr>\n<tr>\n<td>Operating temperature<\/td>\n<td>\u2103<\/td>\n<td>5\u201340 (typical)<\/td>\n<\/tr>\n<tr>\n<td>Applicable pH range<\/td>\n<td>\u2014<\/td>\n<td>2\u201311 (typical, depending on material)<\/td>\n<\/tr>\n<\/table>\n<\/div>\n<p>The data in the table are common ranges for similar equipment and are for selection reference only; specific specifications, models, materials, connections, and control methods must be confirmed during the selection stage based on water quality, treatment scale, and site conditions.<\/p>","protected":false},"excerpt":{"rendered":"<p>Retains colloids, suspended solids, and macromolecules to provide stable pretreatment for NF, RO, and electromembrane systems.<\/p>","protected":false},"featured_media":651,"parent":304,"menu_order":60,"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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"indie_product_cat":[],"class_list":["post-278","indie_product","type-indie_product","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/www.rubri.cn\/en\/wp-json\/wp\/v2\/indie_product\/278","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.rubri.cn\/en\/wp-json\/wp\/v2\/indie_product"}],"about":[{"href":"https:\/\/www.rubri.cn\/en\/wp-json\/wp\/v2\/types\/indie_product"}],"up":[{"embeddable":true,"href":"https:\/\/www.rubri.cn\/en\/wp-json\/wp\/v2\/indie_product\/304"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.rubri.cn\/en\/wp-json\/wp\/v2\/media\/651"}],"wp:attachment":[{"href":"https:\/\/www.rubri.cn\/en\/wp-json\/wp\/v2\/media?parent=278"}],"wp:term":[{"taxonomy":"indie_product_cat","embeddable":true,"href":"https:\/\/www.rubri.cn\/en\/wp-json\/wp\/v2\/indie_product_cat?post=278"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}