Field-tested knowledge on environmental engineering, lithium battery manufacturing, plant design and compliance — written for engineers who build the clean economy.
Electrolyte filling—the step where liquid electrolyte is injected into a sealed or semi-sealed battery cell—looks simple. A needle dispenses liquid into a cell. The cell gets…
Electroplating wastewater is not one wastewater. It's at least three chemically incompatible streams that must be collected, stored, and treated separately before they can ever be…
Every process plant has pipes. Thousands of them. And every experienced plant designer has a story about a piping mistake that cost six figures to fix after construction started.…
When a lithium-ion battery reaches end of life, everyone focuses on the metals—cobalt, nickel, lithium. The electrolyte? Usually burned off during the pyrometallurgical recycling…
A dust collection system that doesn't capture dust at the source is just an expensive fan moving dirty air around the workshop. The hard part isn't sizing the fan or the…
The cathode is 30-40% of a lithium-ion cell's cost and determines its voltage, capacity, safety characteristics, and roughly half its carbon footprint. Pick the wrong cathode…
The A²O process—Anaerobic-Anoxic-Oxic—is the most widely deployed biological nutrient removal (BNR) configuration in the world. It removes organic carbon, nitrogen, and phosphorus…
China Watch is a weekly briefing on under-reported regulatory developments from China's environmental and battery sectors. What Happened On June 1, 2026, China's State…
Oily wastewater is one of those treatment problems where the physics hasn't changed in 50 years, but plants still get it wrong with surprising regularity. The principles—gravity…
Every Monday, China Watch brings you one under-the-radar regulatory or industry development from China that will matter to your business in 3-6 months. Because by the time the…
After coating and drying, your electrode is a porous, fragile film of active material particles loosely bonded to a metal foil. It has about 40-60% porosity, poor electrical…
An MBR (Membrane Bioreactor) gives you the best effluent quality of any biological treatment process—consistently <5 mg/L TSS, <1 NTU turbidity, and 4-6 log pathogen removal. But…