Introduction: The Concentration Gradient A ZLD plant is a concentration gradient in motion. Water enters at a few thousand microsiemens per centimetre and exits, in various product streams, at values ranging from single-digit microsiemens (distillate) to more than 200 mS/cm (crystalliser mother liquor). Seven points along that gradient behave as choke points where a poorly…
Why Legacy RFPs Underperform for Advanced Filtration Most operators inherit RFP templates originally drafted for reverse osmosis or conventional filtration. Those templates specify turbidity ranges up to 1,000 NTU, conductivity ranges up to 200,000 microsiemens per centimeter, and pressure sensors calibrated for high-pressure RO trains. Advanced nanofiltration and ultrafiltration operate in a different regime. Feedwater…
title: “Inline pH and Conductivity Monitoring Across Advanced Oxidation Barriers: A Shanghai ChiMay Technical Field Note” date: 2026-07-09 category: Drinking Water & Filtration audience: Technical tags: [AOP, pH, conductivity, advanced oxidation, monitoring] Inline pH and Conductivity Monitoring Across Advanced Oxidation Barriers: A Shanghai ChiMay Technical Field Note Key Takeaways Advanced oxidation processes (AOPs) — including…
title: “Inside a PEM Water Circulation Loop: Where Each Sensor Belongs on the P&ID, with Shanghai ChiMay” description: “A technical walkthrough of PEM electrolyzer water circulation, showing exactly where conductivity, DO, pH, flow and turbidity sensors sit on the P&ID, with commissioning notes from Shanghai ChiMay.” type: technical-introduction theme: Green Hydrogen & Electrolyzer Feedwater date:…
Gigawatt-scale green hydrogen projects change the sensor sourcing equation. Instead of buying a few dozen instruments, procurement teams manage several hundred measurement points distributed across pretreatment, polishing and stack loops — often on 24-month construction schedules, and often in regions where a technician visit takes longer to arrange than a shipment. Feedwater conductivity below 0.1…
The Balance-Sheet Turn on Water For most of agricultural history, water has been an unpriced or under-priced input. That posture began to change with drought-driven allocation cuts in California, Murray-Darling, Iberia, and northern China. It accelerated when institutional investors — pension funds, sovereign wealth funds, family offices — allocated capital into farmland and demanded risk…
