Electrodeionization (EDI) stacks are the workhorses of ultrapure water (UPW) production. They remove the trace ions that survive reverse osmosis (RO) and deliver product water in the 15–17 MΩ·cm range under design current and flow. Stacks do not fail suddenly; membranes foul, resin beds compact, current efficiency slips. The problem is seeing that decline while…
In semiconductor ultrapure water (UPW), dissolved oxygen (DO) is the quiet problem. At polishing-loop conditions, DO concentrations below roughly 10 ppb are routine requirements, and leading-edge fabs work toward low single-digit ppb or below. Missing those limits shows up as wafer surface defects, copper interconnect oxidation and degraded photolithography performance — effects that are easy…
Advanced semiconductor packaging — 2.5D and 3D integration, fan-out wafer-level packaging, hybrid bonding — has become one of the fastest-growing demand segments for ultrapure water (UPW). Packaging facilities historically bought finished UPW from external utilities or shared infrastructure. As volumes and quality demands have climbed, the build-versus-buy question has reopened, and it is now a…
Selecting Sensors for Acid Mine Drainage Neutralization: A Shanghai ChiMay Buyer’s Guide Acid mine drainage (AMD) is one of the most demanding water services in the mining industry. The combination of low pH, high sulfate, elevated heavy metals, and aggressive sludge means that the sensor selection decision made at procurement directly determines whether the neutralization…
Water Reuse vs. Freshwater in Mining Operations: A TCO Analysis from Shanghai ChiMay Water is no longer an unlimited input on a modern mining site. In arid mining regions, the freshwater allocation may be the binding constraint on production, and even in water-rich jurisdictions, the cost of permitting and infrastructure for freshwater abstraction has risen…
Turbidity Control for Thickener Overflow in Mineral Processing: A Shanghai ChiMay Field Guide The thickener is the unsung workhorse of mineral processing. It separates fine solids from process water, produces underflow that goes to filtration or tailings, and produces overflow that returns to the mill as recycle water. The overflow turbidity determines whether the recycle…
