Reading Colour in Water: How Platinum-Cobalt Degrees and Dilution Multiples Are Reported

2026-09-20

Colority looks simple until it has to be recorded as a number. This guide covers the CIE basis of colour measurement, the platinum-cobalt and dilution multiple methods, how the 500-degree stock solution is prepared, and why pH is always reported alongside

Tank Washing Wastewater: Reaching GB 8978-1996 Tertiary Limits Without Gravity Separation Alone

2026-09-20

Tank washing wastewater carries oil, COD and BOD together, and gravity separation only handles the free oil. This article compares simple gravity separation with SINOKLE's two-stage CDFU plus CDOF route and explains how the integrated skid reaches GB 8978

Flowback Fluid, Stage by Stage: Where Gel-Breaking Ends and Cyclonic Flotation Takes Over

2026-09-20

Flowback fracturing fluid is viscous, oily and full of suspended solids, so no single unit can treat it. This walkthrough follows the SINOKLE train stage by stage, from gravity settling and CDOF gel-breaking through CDFU flotation, scum dewatering and fil

Why Heavy-Oil Tank Draining Resists Conventional Flotation, and How a Two-Stage CDFU Train Fixes It

2026-09-20

Tank draining at heavy-oil depots produces a stable oil-in-water emulsion that gravity separation and ordinary flotation cannot break. This article explains why SINOKLE split the duty across two CDFU stages plus an activated-media filter, and what that ch

Heavy Fuel Oil Tank Cleaning Wastewater: Why One Separator Cannot Clear GB 8978-1996

2026-09-18

Tank-farm cleaning water carries oil, COD and BOD at once, and simple oil separation addresses only part of one of them. A three-stage route of CDFU, coalescing fibre recovery and CDOF catalytic ozone oxidation works through the problem in gradients.

Sulphides in Wastewater: Why the Chemistry Behind H2S Matters for Treatment Decisions

2026-09-18

Sulphides are reducing, alkaline in solution, toxic when acidified and aggressive towards metals. Understanding the hydrolysis, redox and precipitation chemistry explains most of the odour, corrosion and dosing problems they cause in collection systems an

Dissolved Air Flotation Design: The Parameters That Decide Whether a DAF Tank Performs

2026-09-18

Most underperforming DAF units are not badly built, they are badly set. This article sets out the pressure, reflux and loading ranges that govern performance, the streams DAF handles well, and the conditions where it should not be specified at all.

Biofilm Reactors: Why Attached Growth Still Beats Suspended Growth for Small Plants

2026-09-18

Attached-growth treatment keeps a microbial population the hydraulic flow cannot wash out. This article works through biofilm structure, maturation, thickness control and the main reactor formats, and explains where biofilm outperforms activated sludge.

MBR at Fifty: What Membrane Bioreactors Actually Changed in Wastewater Practice

2026-09-18

Replacing the secondary clarifier with a membrane looks like a small change and turned out to be a large one. This review covers MBR configurations, the energy penalty nobody escapes, and the high-strength industrial duties where retention pays for itself

Iron or Aluminium? How Coagulant Chemistry and Jar-Test Discipline Decide Oily Wastewater Performance

2026-09-18

Choosing between iron-based and aluminium-based coagulants is rarely decided by the datasheet. This article compares PFS, PAC and the composite salts, then walks through the jar-test protocol and storage conditions that determine whether any of them perfo