Lake Eutrophication: Why Closing the Inflow Pipe Is Only Half the Job

2026-09-28

Eutrophication is treated as a nutrient input problem, but the sediment at the bottom of a lake keeps feeding algae long after external loads stop. This article covers the limiting-nutrient logic that separates fresh water from seawater, the indicator thr

Polyaluminum Chloride: Reading Basicity, Colour and Grade Before Signing the Order

2026-09-28

Polyaluminum chloride looks like a commodity but behaves like a graded product. Basicity, feedstock and colour decide how it performs, and the production route decides what impurities ride along. This guide covers the five synthesis routes, the four desta

Where Polyferric Sulfate (SPFS) Earns Its Place in a Coagulation Programme

2026-09-28

Polyferric sulfate has displaced low-molecular iron and aluminium salts across printing and dyeing, electroplating and papermaking effluent. This piece walks through the chemistry of PFS, the four preparation routes that shape product quality, the pH wind

Homeward Bound with Honors: Sinokle Welcomes Back Its Overseas Frontline Warrior

2026-09-24

After venturing across seas and mountains in pursuit of their dreams, our colleague has returned home safe and triumphant! Recently, Mr. Liao, an employee assigned to the oily wastewater treatment pro

Super-Gravity Cyclone Separation for Oily Wastewater: What the SINOKLE High-Efficiency Hydrocyclone Changes

2026-09-24

How replacing gravity with a centrifugal field hundreds to thousands of times stronger reshapes oily wastewater separation: the CFD-optimised flow field, zoned parameter adjustment, non-powered operation without chemicals, skid-mounted deployment, and how

Aerobic Biological Treatment: the Operating Envelope, the Microbial Indicators and the Sludge Stages

2026-09-24

The operating envelope for aerobic biological treatment: dissolved oxygen, pH, temperature, nutrients, toxicity and influent BOD5, plus what the BOD5/COD ratio tells you before design starts. Covers the three purification stages in the aeration tank, what

Phosphates in Water and Industry: Speciation, Production Routes and Why the Chemistry Drives Eutrophication

2026-09-24

Why phosphate shows up as a fertiliser, a food additive, a refractory binder and a eutrophication suspect all at once. Covers the four protonation states, orthophosphate and condensed phosphate salt families, the thermal, wet and electrochemical productio

Anammox in the Treatment Plant: Cell Biology, Reactor Configurations and Reported Nitrogen Removal Rates

2026-09-24

How anammox bacteria remove nitrogen without carbon or aeration: the anammoxosome and its ladderane membrane, the hydrazine intermediate pathway and the proton gradient that drives ATP synthesis, what each Candidatus species tolerates, and the nitrogen re

BOD5 as a Design Number: What the Five-Day Test Measures, and Where It Misleads

2026-09-24

BOD5 is not a measure of how much organic matter is present - it is the oxygen a microbial population consumes under fixed conditions. Covers what the five-day test counts, the discharge tiers it is read against, why the BOD/COD ratio is the genuinely use

Ammonia Nitrogen: Why Speciation Decides Toxicity, and How the Two Laboratory Methods Compare

2026-09-24

Why ammonia nitrogen speciation, not total concentration, decides toxicity: NH3 is the harmful fraction while NH4+ is comparatively benign, and pH and temperature set the balance. Covers the four nitrogen forms found in wastewater, the sources of high-amm