Aeration Fundamentals and Where BAF Fits: Oxygen Transfer, Pump Sizing and Media Choices

2026-09-30

Aeration is gas transfer, and the engineering question is interfacial area versus energy. This covers bubble and surface aeration, the groundwater treatment cases, what a GLM(B)-series aeration pump delivers, and how BAF turns aeration plus media into a c

Electrodialysis for Desalting: Membrane Selectivity, Energy Use and the Six Loss Mechanisms

2026-09-30

Electrodialysis trades desalination depth for cost, and it recovers metals and acids that reverse osmosis cannot. This covers how ion-exchange membrane selectivity works, what EDR changed about operation, the recovery and energy figures, and the six secon

Measuring Ammonia Nitrogen: Electrode Methods, Nessler Reagents and the Toxic Fraction

2026-09-30

Un-ionized ammonia drives aquatic toxicity while ammonium salts barely register, so the measurement method matters. A walk through gas-sensing electrode ranges and detection limits, Nessler colorimetry wavelengths, distillation pretreatment, and what the

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