Views: 888 Author: Yosun Publish Time: 2025-07-08 Origin: Site
Dissolved air flotation equipment (DAF) is a highly effective system used for the separation of suspended solids, oils, greases, and other pollutants from contaminated water. It is widely applied in industrial and municipal wastewater treatment plants due to its compact design and superior clarification capabilities. The core principle behind DAF is to attach micro air bubbles to suspended particles, making them buoyant and causing them to float to the water's surface for removal.
As a company specialized in manufacturing dissolved air flotation equipment, we deliver customized DAF systems that help clients maintain high water quality, meet strict discharge regulations, and optimize operational efficiency.
The operation of a DAF system starts by introducing a saturated solution of air into the influent water stream under pressure. As the pressure is released inside the DAF tank, microscopic air bubbles (typically 30–50 microns) are formed. These bubbles attach to contaminants in the water, such as solids, fats, oils, and greases, making them rise to the surface.
A surface skimmer then continuously removes the accumulated floating layer and transfers it to a sludge collection hopper. Meanwhile, clarified water exits from the bottom of the DAF tank. This efficient separation process makes the DAF unit ideal for treating heavily contaminated water where gravity sedimentation is ineffective.
A standard DAF system includes the following components:
DAF tank: The core of the flotation process, where air is released and contaminants are separated.
Control panel: Allows operators to adjust flow rates, air pressure, and chemical dosing with precision.
Air dissolving system: A pressurized saturator that ensures the formation of high-density microbubbles.
Surface skimmer: Continuously removes floated sludge from the water surface.
Chemical pretreatment modules: Optional components for coagulation and flocculation, enhancing separation.
Our systems include corrosion-resistant construction, easy access hatches for maintenance, and programmable logic controllers (PLCs) for fully automated operation.
DAF systems are used in many industries that produce contaminated water containing solids and fats. These industries include:
Food processing plants: Removal of proteins, fats, and food particles.
Dairy and beverage: Elimination of oils and greases, lactose solids, and BOD.
Textile and dyeing factories: Treatment of colored effluents and suspended solids.
Oil and gas production: Separation of hydrocarbons and drilling by-products.
Municipal treatment plants: Used as primary or secondary clarifiers in pre- or post-biological treatment.
The flexibility of DAF technology allows it to be integrated into both new and retrofitted systems for small- and large-scale treatment facilities.
Our dissolved air flotation equipment is designed for durability, efficiency, and ease of operation. Key benefits include:
Compact footprint: Suitable for areas with space limitations.
High removal rates: Especially for oils, greases, and suspended solids.
Flexible flow rates: Systems range from small pilot units to high-capacity clarifiers.
Low energy consumption: Optimized pump design reduces operational cost.
Custom-built solutions: Designed based on the specific characteristics of the wastewater and treatment goals.
The ability to maintain consistent flow rates and treat varying pollutant concentrations makes our systems reliable for even the most demanding environments.
For heavily polluted water, DAF systems often require chemical pre-treatment. This involves dosing coagulants and flocculants into the influent to bind small particles into larger flocs. These flocs provide better surfaces for microbubble attachment, improving the flotation process.
Our DAF units are designed to integrate with chemical mixing tanks and flocculation chambers. With real-time monitoring, the system ensures optimal chemical usage and consistent water quality output.
To ensure stable performance, our equipment includes a user-friendly control panel that monitors system functions. Operators can track variables such as:
Inlet and outlet flow rates
Recycle pump pressure
Dissolved air concentration
Sludge thickness
Chemical dosing levels
These controls help avoid issues like sludge overloading, under-aeration, or improper chemical reactions, ensuring that your wastewater treatment goals are consistently met.
DAF systems are crucial in helping facilities meet environmental discharge limits. Our systems support compliance with local and international standards for:
Total Suspended Solids (TSS)
Biochemical Oxygen Demand (BOD)
Chemical Oxygen Demand (COD)
Oils and greases (O&G)
By using dissolved air flotation clarifiers, clients can reduce their environmental footprint and avoid fines or operational disruptions due to non-compliance.
Our company focuses exclusively on producing high-quality, customizable DAF systems for treating contaminated water. Our systems include:
Modular and plug-and-play designs
Full technical support from engineering to installation
Proven field performance across a variety of industries
Compatibility with sludge dewatering and MBBR systems
With decades of experience in water treatment, we help industrial and municipal clients reduce their wastewater challenges and meet their sustainability goals.
