CDOF Features and Its Applications in Wastewater Treatment
SINOKLE Technology's CDOF (Cyclonic Dissolved Ozone Flotation Unit - an integrated ozone catalytic oxidation and flotation device) technology is an innovative water treatment technology that deeply integrates the ozone-catalyzed advanced oxidation and dissolved air flotation processes. In wastewater treatment, especially in the field of advanced treatment and reuse of refractory industrial wastewater, it demonstrates significant advantages and features.
The following details its features and applications in wastewater treatment:
I. CDOFCore Technical Features
High-efficiency catalytic ozone oxidation:
Core advantage: CDOF is centered on its proprietary catalyst. This catalyst efficiently activates ozone molecules, converting them into hydroxyl radicals with extremely strong oxidizing power.
Strong oxidizing power: The redox potential of hydroxyl radicals is far higher than that of ordinary ozone, enabling non-selective mineralization or chain-cleaving decomposition of the vast majority of refractory organic pollutants (such as COD, BOD, color, toxic substances, antibiotics, pesticides and endocrine disruptors); it is especially good at treating stubborn organics that conventional biochemical methods cannot handle.
High reaction efficiency: The catalyst significantly improves ozone utilization and reaction rate, shortens treatment time and reduces ozone dosage, thereby lowering operating costs。
Deep coupling with dissolved air flotation:
The microbubbles efficiently float and separate the tiny flocs, colloidal matter, partially oxidized pollutants and inert gases formed during the oxidation process。
The microbubbles themselves also provide a certain oxidizing environment (gas-liquid interface effects).
Synchronized separation: the CDOF efficiently integrates the catalytic oxidation reactor with the dissolved air flotation unit. While oxidizing and degrading organics:
Improved water quality: this coupling removes not only dissolved pollutants but also suspended and colloidal matter, significantly reducing effluent turbidity, color and SS, with better effluent appearance and stability.
Broad-spectrum treatment capability:
It can effectively treat industrial wastewater containing complex components such as benzene series, phenols, cyanide, heterocyclic compounds, dyes, surfactants, pharmaceutical intermediates and petroleum hydrocarbons.
It has special effects on high-color, high-toxicity wastewater.
Improved biodegradability:
by oxidizing and decomposing macromolecular, refractory organics into small, readily biodegradable intermediates, the CDOFCDOF can significantly increase the BOD5/COD ratio of the wastewater, creating favorable conditions for subsequent biological treatment; it is often used as a pre-treatment or advanced treatment unit for biochemical systems.
No secondary pollution risk:
The main reaction products are CO2, H2O and inorganic salts; no iron-containing sludge like that of the Fenton process is produced.
Ozone is generated on site, with no hazardous chemical transport or storage risks (unlike liquid chlorine, etc.).
The amount of scum produced is relatively small and easy to handle.
Small footprint and high automation:
The integrated design makes the equipment compact, occupying less space than the conventional combination of 'ozone oxidation + sedimentation/filtration'.
The system is easy to automate, with relatively simple operation and management.
Flexible application: it can be used
as an independent advanced treatment unit, enabling the effluent to meet strict discharge or reuse standards.
It can serve as a pre-treatment unit for biochemical treatment, improving the overall treatment efficiency and stability of the system.
It can be used for upgrading and retrofitting existing wastewater treatment plants, improving treatment performance within limited space.
II. CDOF Applications in Wastewater Treatment
CDOF technology has outstanding application value in the following wastewater treatment scenarios:
Advanced treatment and reuse of refractory industrial wastewater:
Typical industries:Petrochemical, coal chemical, fine chemical, pharmaceutical (antibiotics, synthetic drugs), pesticide, dye and printing-dyeing, coking, landfill leachate (membrane concentrate), electroplating, electronics, etc.
Objective:To deeply remove COD, color, toxic substances and characteristic pollutants so that the effluent stably meets Grade 1A of the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants, special discharge limits or stricter local standards, and even industrial reuse water quality requirements (such as circulating cooling water make-up).
Pre-treatment of high-concentration, high-toxicity wastewater:
For wastewater with very poor biodegradability or containing inhibitory/toxic substances, CDOF as a pre-treatment, it can effectively degrade toxic substances, improve biodegradability and protect the stable operation of downstream biochemical treatment units (such as anaerobic and aerobic units).
Removal of specific pollutants:
It efficiently removes residual antibiotics, endocrine disruptors, persistent organic pollutants and other emerging trace pollutants from water, meeting increasingly stringent environmental requirements.
Wastewater decolorization:
It has extremely strong decolorization capability for high-color wastewater such as dye wastewater, printing/dyeing wastewater and coking wastewater, with removal rates usually above 95%.
Improving existing system capacity and stability:
Used for upgrading existing wastewater plants (especially industrial park plants), adding a CDOFCDOF unit after the biochemical stage, effectively improving COD, color and other compliance indicators without large-scale expansion, and coping with water quality fluctuations.
SINOKLE Technology's CDOF technology, with its high-efficiency catalytic ozone oxidation and deep coupling with dissolved air flotation core features, in the field of refractory industrial wastewater treatment, demonstrates strong competitiveness. It is particularly adept at solving COD, color and toxicity problems that conventional biochemical methods struggle to handle, achieving advanced purification and reuse goals. Its broad-spectrum effectiveness, absence of secondary pollution risk, small footprint and flexible application make it an important technology choice for difficult wastewater treatment, plant upgrading and water resource reuse. Of course, in practical application, comprehensive evaluation and optimized design should be combined with specific water quality and economics.
