Reverse Osmosis Sizing: Pressure Balance, Transport Models and What Element Specs Really Tell You

2026-09-24

A practical walk through reverse osmosis: where the driving force comes from, how the competing transport models were finally reconciled, and which element specifications genuinely predict plant performance. Covers osmotic pressure, the flux relationship,

Printing and Dyeing Wastewater: Where the Load Comes From and Why Biology Struggles

2026-09-23

A stream-by-stream breakdown of printing and dyeing effluent, from desizing and mercerizing to alkali peeling, the composite quality envelope plants actually see, and why adsorption and biology both fall short.

Membrane Fouling: Sorting Precipitation, Organic Adsorption and Biofilm Before Choosing a Clean

2026-09-23

Fouling is rarely one problem. This piece separates precipitation, organic adsorption, gel-layer formation and biofouling, explains why hydraulic cleaning fails on each, and covers the chemical controls that actually extend a run.

The Anaerobic Baffled Reactor: Phase Separation in One Tank and What It Costs You

2026-09-23

How vertical baffles split acidogenesis from methanogenesis inside a single shell, the geometry and loading rules that govern performance, the start-up strategies, and the process combinations ABR is normally dropped into.

Anammox Bacteria: The Slow-Growing Autotrophs That Cut Aeration and Carbon Demand

2026-09-23

How anammox bacteria convert ammonia and nitrite straight to nitrogen gas, the hydrazine and hydroxylamine chemistry inside the anammoxosome, the six known genera, and what full-scale SHARON, CANON and EGSB combinations have achieved.

Ammonia Nitrogen: What the Number Means and How the Common Methods Actually Measure It

2026-09-23

Ammonia nitrogen is really three species with different toxicity. This piece covers the speciation, the ammonia-sensitive electrode method, Nessler colorimetry, reagent make-up, and the detection limits each route reaches.

Iron or Aluminium? Choosing and Dosing Flocculants Without Wasting Chemical

2026-09-23

A field guide to the iron-based and aluminium-based flocculant families, what the polymer acronyms actually mean, how to make down and meter solutions, and the mixing energies each coagulation stage needs.

Raising the BOD/COD Ratio Before Aerobic Treatment: What Hydrolysis Acidification Really Does

2026-09-23

Why refractory wastewater fails in the aeration tank, how holding anaerobic treatment at the hydrolysis and acidification stages lifts biodegradability, and the retention, upflow and pH windows that make it work.

Packing, Air and Biofilm: Getting Biological Contact Oxidation Right on Industrial Waste

2026-09-23

How submerged packing turns an aeration tank into a fixed-film reactor, why direct aeration beats split-flow on most industrial duties, and the loading, dissolved-oxygen and geometry numbers that keep the media from blinding.

What Actually Governs an Activated Sludge Plant: Tank Shape, Load Rate and Oxygen Timing

2026-09-23

A practical walk through the four units every activated sludge plant shares, why uniform aeration wastes energy, how the sludge load rate sets both effluent and cost, and what conditions keep the biomass healthy.