Nanofiltration Between RO and UF: Where Charged Membranes Pay Off on Industrial Wastewater

2026-09-29

Nanofiltration sits between reverse osmosis and ultrafiltration, retaining nanometre-sized particles at lower pressure. Because the membrane itself carries charge, it rejects multivalent ions and mid-weight organics while passing monovalent ions and small

Electrodialysis for Brackish Water and Industrial Recovery: Where It Beats Reverse Osmosis

2026-09-29

Electrodialysis moves ions through selectively permeable membranes under a DC field, which makes it cheaper than reverse osmosis but less complete as a desalination step. This article covers the membrane and electrode chemistry behind it, the performance

Electrodeionization: How Resins, Membranes and Current Produce Ultrapure Water Without Acid Regeneration

2026-09-29

EDI combines ion-exchange resin, ion-exchange membranes and electromigration to desalinate continuously while regenerating the resin electrically. This article explains the ion-exchange fundamentals it rests on - selectivity, equilibria and diffusion cont

Inside the Aeration Tank: What Actually Governs an Activated Sludge Plant

2026-09-29

An activated sludge plant is more than a tank and a blower. This article sets out the five subsystems that make it work, the two-stage mechanism by which organics move from sewage into biomass, why the organic-to-microorganism ratio drives every design ch

Turbidity Units Explained: JTU, NTU, FTU, FNU and EBC, and Why Plants Still Say Degrees

2026-09-29

Turbidity is defined against a standard rather than measured as a mass, which is why several units coexist. This piece traces how the Jackson unit, nephelometric units and the formazin standard relate to one another, where the brewing industry's EBC unit

Lithium Battery Wastewater: Emulsified Oil, NMP Solvent and the Push Toward High Water Reuse

2026-09-29

Electrode coating, electrolyte filling and circulating cooling generate a stable, hard-to-break emulsion carrying NMP, PVDF binder, conductive agents and lithium, cobalt and nickel ions. This article sets out why conventional physicochemical and biochemic

Fine Oil Droplets and Clogged Separators: What a Hypergravity Cyclonic Unit Does Differently

2026-09-29

Traditional oil-water separators lose efficiency on emulsified and micro-fine oil, need chemical dosing, clog easily and take up too much space. This article looks at how hypergravity cyclonic separation, CFD-optimised flow channels and modular skid desig

Battery-Grade Nickel Sulfate: Where Product-Liquor TOC Comes From and How to Strip It Out

2026-09-29

Total organic carbon in nickel sulfate, cobalt sulfate and manganese sulfate product liquors traces back to two sources: extractant residues and organic production additives. They travel with the metal ions and end up in cathode material precursors, causi

Import Dependence in Oily Wastewater: What a Domestic Cyclone Flotation Unit Actually Changes

2026-09-29

Ultra-high water-cut oilfield produced water and refinery electro-desalting cut water were long served by imported flotation equipment that struggled with local conditions. This article examines the three failings of imported and chemical routes, breaks d

Refractory Wastewater: Why Conventional Trains Miss COD and Where Integrated Oxidation-Flotation Fits

2026-09-29

Refinery, pharmaceutical metallurgy, leachate and oilfield streams all hit the same wall: macromolecular polymers, dissolved oil and refractory organics that biology and gravity separation cannot touch. This piece looks at why conventional trains fall sho