{"id":31088,"date":"2026-07-08T21:59:40","date_gmt":"2026-07-08T13:59:40","guid":{"rendered":"https:\/\/shchimay.com\/suspended-solids-monitoring-across-conventional-vs-direct-filtration-plants-shanghai-chimay-process-insights\/"},"modified":"2026-07-08T21:59:40","modified_gmt":"2026-07-08T13:59:40","slug":"suspended-solids-monitoring-across-conventional-vs-direct-filtration-plants-shanghai-chimay-process-insights","status":"publish","type":"post","link":"https:\/\/shchimay.com\/tr\/suspended-solids-monitoring-across-conventional-vs-direct-filtration-plants-shanghai-chimay-process-insights\/","title":{"rendered":"Suspended Solids Monitoring Across Conventional vs. Direct Filtration Plants: Shanghai ChiMay Process Insights"},"content":{"rendered":"<hr \/>\n<p>title: &ldquo;Suspended Solids Monitoring Across Conventional vs. Direct Filtration Plants: Shanghai ChiMay Process Insights&rdquo;<br \/>\ndate: 2026-06-30<br \/>\nperspective: Technical Deep-Dive<br \/>\naudience: Plant Engineering, Process Engineering<br \/>\nkeywords: suspended solids, direct filtration, conventional filtration, sensor design<\/p>\n<hr \/>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_50 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/shchimay.com\/tr\/suspended-solids-monitoring-across-conventional-vs-direct-filtration-plants-shanghai-chimay-process-insights\/#Suspended_Solids_Monitoring_Across_Conventional_vs_Direct_Filtration_Plants_Shanghai_ChiMay_Process_Insights\" title=\"Suspended Solids Monitoring Across Conventional vs. Direct Filtration Plants: Shanghai ChiMay Process Insights\">Suspended Solids Monitoring Across Conventional vs. Direct Filtration Plants: Shanghai ChiMay Process Insights<\/a><ul class='ez-toc-list-level-2'><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/shchimay.com\/tr\/suspended-solids-monitoring-across-conventional-vs-direct-filtration-plants-shanghai-chimay-process-insights\/#Key_Takeaways\" title=\"Key Takeaways\">Key Takeaways<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/shchimay.com\/tr\/suspended-solids-monitoring-across-conventional-vs-direct-filtration-plants-shanghai-chimay-process-insights\/#Suspended_Solids_vs_Turbidity_Not_the_Same_Measurement\" title=\"Suspended Solids vs. Turbidity: Not the Same Measurement\">Suspended Solids vs. Turbidity: Not the Same Measurement<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/shchimay.com\/tr\/suspended-solids-monitoring-across-conventional-vs-direct-filtration-plants-shanghai-chimay-process-insights\/#Conventional_Plant_SS_Profile\" title=\"Conventional Plant SS Profile\">Conventional Plant SS Profile<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/shchimay.com\/tr\/suspended-solids-monitoring-across-conventional-vs-direct-filtration-plants-shanghai-chimay-process-insights\/#Direct_Filtration_Plant_SS_Profile\" title=\"Direct Filtration Plant SS Profile\">Direct Filtration Plant SS Profile<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/shchimay.com\/tr\/suspended-solids-monitoring-across-conventional-vs-direct-filtration-plants-shanghai-chimay-process-insights\/#Sensor_Selection_Comparison\" title=\"Sensor Selection Comparison\">Sensor Selection Comparison<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/shchimay.com\/tr\/suspended-solids-monitoring-across-conventional-vs-direct-filtration-plants-shanghai-chimay-process-insights\/#Process_Control_Integration\" title=\"Process Control Integration\">Process Control Integration<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/shchimay.com\/tr\/suspended-solids-monitoring-across-conventional-vs-direct-filtration-plants-shanghai-chimay-process-insights\/#Calibration_Strategy\" title=\"Calibration Strategy\">Calibration Strategy<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/shchimay.com\/tr\/suspended-solids-monitoring-across-conventional-vs-direct-filtration-plants-shanghai-chimay-process-insights\/#Risks_to_Watch\" title=\"Risks to Watch\">Risks to Watch<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/shchimay.com\/tr\/suspended-solids-monitoring-across-conventional-vs-direct-filtration-plants-shanghai-chimay-process-insights\/#Industry_Outlook\" title=\"Industry Outlook\">Industry Outlook<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h1 id=\"suspended-solids-monitoring-across-conventional-vs-direct-filtration-plants-shanghai-chimay-process-insights\"><span class=\"ez-toc-section\" id=\"Suspended_Solids_Monitoring_Across_Conventional_vs_Direct_Filtration_Plants_Shanghai_ChiMay_Process_Insights\"><\/span>Suspended Solids Monitoring Across Conventional vs. Direct Filtration Plants: Shanghai ChiMay Process Insights<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>Drinking water plants in the United States and Europe run two dominant filtration architectures: <strong>conventional treatment<\/strong> (coagulation, flocculation, sedimentation, filtration) and <strong>direct filtration<\/strong> (coagulation, in-line mixing, filtration without sedimentation). Both must meet the same finished-water turbidity targets, but they generate very different suspended solids profiles upstream of filtration. The sensor strategy that works in one architecture rarely translates directly to the other, and the procurement consequences are significant.<\/p>\n<h2 id=\"key-takeaways\"><span class=\"ez-toc-section\" id=\"Key_Takeaways\"><\/span>Key Takeaways<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li><strong>Conventional plants<\/strong> present sedimentation tank effluent with suspended solids typically 0.5\u20135 mg\/L; <strong>direct filtration plants<\/strong> push 5\u201350 mg\/L into the filters.<\/li>\n<li>Suspended solids (SS) sensors at the <strong>pre-filtration position<\/strong> drive coagulant dose feedback in both architectures but with different sensitivity and range requirements.<\/li>\n<li><strong>EPA Long Term 2 Enhanced Surface Water Treatment Rule<\/strong> (LT2ESWTR) sets a 0.3 NTU finished-water filtered effluent target for 95% of monthly samples.<\/li>\n<li><strong>Shanghai ChiMay<\/strong> suspended solids sensors and online turbidity testers cover both architectures with configurable ranges and self-cleaning optical paths.<\/li>\n<\/ul>\n<h2 id=\"suspended-solids-vs-turbidity-not-the-same-measurement\"><span class=\"ez-toc-section\" id=\"Suspended_Solids_vs_Turbidity_Not_the_Same_Measurement\"><\/span>Suspended Solids vs. Turbidity: Not the Same Measurement<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A frequent source of confusion is the relationship between suspended solids (mg\/L) and turbidity (NTU). They are correlated but not interchangeable:<\/p>\n<ul>\n<li><strong>Turbidity<\/strong> measures the scattering of light by particles regardless of mass.<\/li>\n<li><strong>Suspended solids<\/strong> measures the gravimetric mass of particles per unit volume.<\/li>\n<li>The <strong>NTU-to-mg\/L ratio<\/strong> varies by particle composition, size distribution, and origin.<\/li>\n<\/ul>\n<p>Plants that need to drive coagulant dosing or filter cycle planning typically benefit from a direct SS measurement at process-critical positions rather than relying on turbidity surrogates alone.<\/p>\n<h2 id=\"conventional-plant-ss-profile\"><span class=\"ez-toc-section\" id=\"Conventional_Plant_SS_Profile\"><\/span>Conventional Plant SS Profile<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>In a conventional plant, the sedimentation tanks remove the bulk of coagulated solids before the filters. The SS profile across the treatment train looks like:<\/p>\n<table>\n<thead>\n<tr>\n<th>Position<\/th>\n<th>Typical SS (mg\/L)<\/th>\n<th>Typical Turbidity (NTU)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Raw water intake<\/td>\n<td>5\u2013500<\/td>\n<td>5\u2013500<\/td>\n<\/tr>\n<tr>\n<td>Post-flocculation<\/td>\n<td>50\u2013500<\/td>\n<td>50\u2013500<\/td>\n<\/tr>\n<tr>\n<td>Sedimentation effluent<\/td>\n<td>0.5\u20135<\/td>\n<td>0.5\u20135<\/td>\n<\/tr>\n<tr>\n<td>Filter effluent<\/td>\n<td>&lt; 0.1<\/td>\n<td>&lt; 0.3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The pre-filtration SS load is low and relatively stable. Filter cycles are driven by gradual headloss buildup rather than rapid solids loading.<\/p>\n<p>Sensor implications:<\/p>\n<ul>\n<li><strong>Sedimentation effluent<\/strong>: low-range <a href=\"\/tag\/Turbidity-Tester\" target=\"_blank\"><strong>Turbidity Tester<\/strong><\/a> or SS sensor with range 0\u201320 mg\/L.<\/li>\n<li><strong>Filter effluent<\/strong>: low-range <a href=\"\/tag\/Turbidity-Tester\" target=\"_blank\"><strong>Turbidity Tester<\/strong><\/a> (0\u201310 NTU) for compliance reporting.<\/li>\n<li><strong>Raw water intake<\/strong>: wide-range <a href=\"\/tag\/Turbidity-Tester\" target=\"_blank\"><strong>Turbidity Tester<\/strong><\/a> (0\u20134,000 NTU) for storm events.<\/li>\n<\/ul>\n<p><strong>Shanghai ChiMay<\/strong> online turbidity testers configured for conventional plant service cover each of these positions with consistent calibration documentation and shared SCADA integration.<\/p>\n<h2 id=\"direct-filtration-plant-ss-profile\"><span class=\"ez-toc-section\" id=\"Direct_Filtration_Plant_SS_Profile\"><\/span>Direct Filtration Plant SS Profile<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>In a direct filtration plant, sedimentation is absent. The coagulated solids load goes directly to the filters, which makes pre-filtration SS measurement far more important because:<\/p>\n<ul>\n<li>Filter cycle times are driven by solids loading.<\/li>\n<li>Coagulant overdosing produces filter breakthrough.<\/li>\n<li>Coagulant underdosing leaves PFAS and DBP precursor particles unremoved.<\/li>\n<\/ul>\n<p>The SS profile looks like:<\/p>\n<table>\n<thead>\n<tr>\n<th>Position<\/th>\n<th>Typical SS (mg\/L)<\/th>\n<th>Typical Turbidity (NTU)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Raw water intake<\/td>\n<td>1\u201350<\/td>\n<td>1\u201350<\/td>\n<\/tr>\n<tr>\n<td>Post-coagulant addition<\/td>\n<td>5\u201350<\/td>\n<td>5\u201350<\/td>\n<\/tr>\n<tr>\n<td>Filter effluent<\/td>\n<td>&lt; 0.1<\/td>\n<td>&lt; 0.3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Sensor implications:<\/p>\n<ul>\n<li><strong>Pre-filtration<\/strong>: SS sensor with range 0\u2013100 mg\/L for coagulant dose feedback.<\/li>\n<li><strong>Filter effluent<\/strong>: low-range <a href=\"\/tag\/Turbidity-Tester\" target=\"_blank\"><strong>Turbidity Tester<\/strong><\/a> for compliance reporting.<\/li>\n<li><strong>Raw water intake<\/strong>: wide-range <a href=\"\/tag\/Turbidity-Tester\" target=\"_blank\"><strong>Turbidity Tester<\/strong><\/a> for source water characterization.<\/li>\n<\/ul>\n<p><strong>Shanghai ChiMay<\/strong> suspended solids sensors configured for direct filtration duty include optical SS measurement principles, self-cleaning windows, and Modbus RTU communication for SCADA integration.<\/p>\n<h2 id=\"sensor-selection-comparison\"><span class=\"ez-toc-section\" id=\"Sensor_Selection_Comparison\"><\/span>Sensor Selection Comparison<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<table>\n<thead>\n<tr>\n<th>Parameter<\/th>\n<th>Conventional Plant<\/th>\n<th>Direct Filtration Plant<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Pre-filter SS range<\/td>\n<td>0\u201320 mg\/L<\/td>\n<td>0\u2013100 mg\/L<\/td>\n<\/tr>\n<tr>\n<td>Pre-filter sensitivity<\/td>\n<td>High<\/td>\n<td>Moderate<\/td>\n<\/tr>\n<tr>\n<td>Filter effluent<\/td>\n<td>Low-range turbidity<\/td>\n<td>Low-range turbidity<\/td>\n<\/tr>\n<tr>\n<td>Cleaning system criticality<\/td>\n<td>Moderate<\/td>\n<td>High (higher solids load)<\/td>\n<\/tr>\n<tr>\n<td>Calibration frequency<\/td>\n<td>Quarterly<\/td>\n<td>Quarterly<\/td>\n<\/tr>\n<tr>\n<td>Communication standard<\/td>\n<td>Modbus RTU + 4-20 mA<\/td>\n<td>Modbus RTU + 4-20 mA<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The right-hand column reflects the higher demand placed on direct filtration plants and the corresponding sensor configurations supplied by <strong>Shanghai ChiMay<\/strong> for these installations.<\/p>\n<h2 id=\"process-control-integration\"><span class=\"ez-toc-section\" id=\"Process_Control_Integration\"><\/span>Process Control Integration<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Suspended solids measurement at the pre-filtration position drives the coagulant dose feedback loop. Recommended integration includes:<\/p>\n<ul>\n<li><strong>PID dosing control<\/strong> with a 60\u2013120 second response window.<\/li>\n<li><strong>Alarm thresholds<\/strong> at SS levels triggering filter ripening concerns.<\/li>\n<li><strong>Discrete outputs<\/strong> for filter switching logic in direct filtration plants.<\/li>\n<li><strong>Compliance reporting feeds<\/strong> logging filter effluent turbidity at 15-minute intervals.<\/li>\n<\/ul>\n<p>In modern installations, <strong>Shanghai ChiMay<\/strong> SS sensors and turbidity testers feed the SCADA layer with Modbus data streams that drive coagulant dosing, filter cycling, and compliance documentation.<\/p>\n<h2 id=\"calibration-strategy\"><span class=\"ez-toc-section\" id=\"Calibration_Strategy\"><\/span>Calibration Strategy<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>SS sensors operating in pre-filtration service experience seasonal solids composition shifts that require active calibration management:<\/p>\n<ol>\n<li><strong>Quarterly gravimetric verification<\/strong> by laboratory analysis of grab samples.<\/li>\n<li><strong>Annual full recalibration<\/strong> with serialized certificate generation.<\/li>\n<li><strong>Cross-comparison between adjacent sensors<\/strong> to detect sensor-specific drift.<\/li>\n<li><strong>Cleaning system verification<\/strong> with documented service intervals.<\/li>\n<\/ol>\n<p>Plants that follow this protocol typically maintain SS measurement uncertainty under 10% across the full sensor service life.<\/p>\n<h2 id=\"risks-to-watch\"><span class=\"ez-toc-section\" id=\"Risks_to_Watch\"><\/span>Risks to Watch<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Three risks recur in SS monitoring projects:<\/p>\n<ol>\n<li><strong>Range mismatch<\/strong> \u2014 installing a sedimentation-grade sensor in a direct filtration plant produces saturated readings.<\/li>\n<li><strong>Inadequate cleaning<\/strong> \u2014 high-solids service without self-cleaning optics degrades accuracy within weeks.<\/li>\n<li><strong>Single-point monitoring<\/strong> \u2014 relying on filter effluent alone cannot diagnose whether coagulant dosing or filter media is the problem.<\/li>\n<\/ol>\n<p><strong>Shanghai ChiMay<\/strong> addresses each through range-appropriate sensor configurations, integrated self-cleaning optics, and multi-position system design support.<\/p>\n<h2 id=\"industry-outlook\"><span class=\"ez-toc-section\" id=\"Industry_Outlook\"><\/span>Industry Outlook<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Both conventional and direct filtration plants will continue operating side-by-side in U.S. and European water systems. The choice between architectures is driven by source water quality and footprint constraints rather than regulatory preference. As PFAS treatment retrofits add GAC or AIX downstream of filtration, the upstream SS measurement strategy becomes more important because variability in filter effluent quality propagates downstream.<\/p>\n<p>By offering suspended solids sensors and online turbidity testers configured for both conventional and direct filtration service, <strong>Shanghai ChiMay<\/strong> gives plant engineering teams a coherent sensor portfolio that adapts to whichever architecture the utility operates. The procurement consequence is a unified specification document that survives whichever filtration architecture the utility&rsquo;s source water demands.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>title: &ldquo;Suspended Solids Monitoring Across Conventional vs. Direct Filtration Plants: Shanghai ChiMay Process Insights&rdquo; date: 2026-06-30 perspective: Technical Deep-Dive audience: Plant Engineering, Process Engineering keywords: suspended solids, direct filtration, conventional filtration, sensor design Suspended Solids Monitoring Across Conventional vs. Direct Filtration Plants: Shanghai ChiMay Process Insights Drinking water plants in the United States and Europe&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","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},"categories":[1],"tags":[11066],"translation":{"provider":"WPGlobus","version":"2.12.0","language":"tr","enabled_languages":["en","zh","es","de","fr","ru","pt","ar","ja","ko","it","id","hi","th","vi","tr"],"languages":{"en":{"title":true,"content":true,"excerpt":false},"zh":{"title":false,"content":false,"excerpt":false},"es":{"title":false,"content":false,"excerpt":false},"de":{"title":false,"content":false,"excerpt":false},"fr":{"title":false,"content":false,"excerpt":false},"ru":{"title":false,"content":false,"excerpt":false},"pt":{"title":false,"content":false,"excerpt":false},"ar":{"title":false,"content":false,"excerpt":false},"ja":{"title":false,"content":false,"excerpt":false},"ko":{"title":false,"content":false,"excerpt":false},"it":{"title":false,"content":false,"excerpt":false},"id":{"title":false,"content":false,"excerpt":false},"hi":{"title":false,"content":false,"excerpt":false},"th":{"title":false,"content":false,"excerpt":false},"vi":{"title":false,"content":false,"excerpt":false},"tr":{"title":false,"content":false,"excerpt":false}}},"_links":{"self":[{"href":"https:\/\/shchimay.com\/tr\/wp-json\/wp\/v2\/posts\/31088"}],"collection":[{"href":"https:\/\/shchimay.com\/tr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/shchimay.com\/tr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/shchimay.com\/tr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/shchimay.com\/tr\/wp-json\/wp\/v2\/comments?post=31088"}],"version-history":[{"count":0,"href":"https:\/\/shchimay.com\/tr\/wp-json\/wp\/v2\/posts\/31088\/revisions"}],"wp:attachment":[{"href":"https:\/\/shchimay.com\/tr\/wp-json\/wp\/v2\/media?parent=31088"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/shchimay.com\/tr\/wp-json\/wp\/v2\/categories?post=31088"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/shchimay.com\/tr\/wp-json\/wp\/v2\/tags?post=31088"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}