Recovering crude oil instead of sludge: the economics of chemical-free CDFU flotation

2026-10-20

Chemical flotation solves the water problem and creates two new ones: degraded waste oil and hazardous sludge. This article examines how CDFU cyclonic dissolved gas flotation separates oil physically, how much of the recovered oil keeps its value, which o

High water cut and polymer flooding: can CDFU replace DAF in produced water treatment?

2026-10-20

As Chinese oilfields move into late development, produced water has become harder to treat while reinjection standards stay fixed. This article compares inclined-plate settling, conventional dissolved gas flotation and the CDFU process, then reports Daqin

Four oilfield wastewater problems that break conventional processes, and how to answer them

2026-10-20

Emulsified oil, toxic residuals, flow swings and sludge cost are the four reasons oilfield wastewater plants fall short of reinjection standards. This article maps each problem to a specific countermeasure, from demulsification chemistry through CDFU flot

Coalescing media selection: why clogging and short life decide the whole separator

2026-10-20

Coalescing internals are usually chosen on separation efficiency and then judged on downtime. This article reviews the design logic behind SINOKLE high-efficiency coalescing media, covering how corrugated geometry buys collision probability, why demulsifi

Sour water from delayed coking: stripping a refinery's most awkward wastewater stream

2026-10-20

Delayed coking produces sour water laced with coke powder and emulsified light oil, and that combination attacks a stripper from the inside. This article traces the mechanism, compares the removal options, and reports an industrial case where CDFU plus co

Oily ship bilge water at ports: meeting Tier-3 discharge in a footprint cut by 60%

2026-10-20

Tighter supervision of ship discharges leaves ports and marine cloud warehouses with a space problem and a compliance problem at the same time. This article examines a zero-chemical skid-mounted approach built on CDOF and CDFU, the effluent numbers it ach

KFM active filter media: a fine filtration stage for reinjection water at 1.5 μm cut-off

2026-10-20

Fine filtration fails more often on chemistry than on mechanics. This article explains how superhydrophilic modification changes what a filter bed does with emulsified oil, what the KFM active filter media unit delivers in effluent quality, how far its pr

Building an oily wastewater train: how CDFU flotation and CDOF oxidation fit together

2026-10-20

A treatment train only works when each stage removes what the next stage cannot tolerate. This article explains why SINOKLE pairs CDFU cyclonic dissolved air flotation with CDOF catalytic ozonation, what each unit removes and at what rate, how the two sta

Sponge city funding explained: central subsidies, PPP bonuses and what cities actually built

2026-10-20

China's sponge city programme paired a hard target for on-site rainfall absorption with a tiered subsidy system and a competitive selection process. This review unpacks how the money was allocated, what the 70% target means for a city's built-up area, and

Why do micro-nano bubbles lift COD removal from 42% to 83% in industrial wastewater?

2026-10-20

Micro-nano bubbles change the arithmetic of industrial wastewater treatment, not just its chemistry. This article walks through the physical properties that make them different, then looks at measured results on high-salinity brine and high-load ethylene