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Dissolved Air Flotation
Application:
Air flotation technology has been widely used in water supply and drainage and wastewater treatment in recent years. It can effectively remove the flotsam that is difficult to settle in wastewater.
Features:

  • Large processing capacity, high efficiency, and small land occupation.

  • The process and equipment structure are simple, easy to use and maintain.

  • It can eliminate sludge expansion.

  • Aeration into the water during air flotation has a significant effect on removing surfactants and odors in the water. At the same time, because aeration 12 increases the dissolved oxygen in the water, it provides favorable conditions for subsequent treatment.

  • For water sources with low temperature, low turbidity, and a lot of algae, the best effect can be achieved by using air flotation.

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DISSOLVED AIR FLOTATION SYSTEM (DAF)

Is an efficient flotation method for water clarification. The term refers to the method of producing flotation by dissolving air in the water under pressure and then releasing the pressure. When the pressure is released the solution becomes supersaturated with air as millions of small bubbles form. These bubbles attach to any particles in the water causing their density to become less than that of water. The particles then rapidly float to the surface for collection and removal, leaving the clarified water behind.

We manufacture and export DAF equipment for Wastewater Treatment over 20 countries. Support Custom design.

  • DAF Equipment
  • DAF Equipment
  • DAF Equipment

NIHAO DAF Machine FEATURES

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Flow rate of one set: 1-150m³/h.

High efficiency pressurization system providing high quantity dissolved-air water to create large quantities of micro bubbles.

Custom design on different dissolved air flotation(DAF) equipment and recycle flow ration according to the type of wastewater and treatment requirement to achieve target removal effect and stability.

Adjustable nylon or stainless steel chain type skimmer to suit the different quantity of sludge.

Integrated coagulation and flocculation tank and cleaning water tank(as optional).

Automatic and remote controllable.

Material of construction:

Carbon steel(epoxy painted)
Carbon steel(epoxy painted)+FRP lining
SUS304
SUS316L

NIHAO DAF Equipment APPLICATION

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DAF Equipment Application

DAF system is a proven, and effective physical-chemical technology commonly used for many industrial and municipal applications, including:

  • Product recovery and reuse
  • Pretreatment to meet sewer discharge limits
  • Pretreatment to reduce loading on downstream biological systems
  • Polishing of biological treatment effluent
  • Removing silt and grease from industrial water

DAF is used extensively in the following industries:

  • Meat, poultry and fish processing
  • Dairy industry
  • Petrochemicals
  • Pulp and paper
  • Food and beverage

NIHAO DAF Equipment SPECIFICATIONS

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Model Dimension Skimmer Power(kw) Mixer Power(kW) Dissolved Air Pump Power(kW) Air Compre ssor Power(kW)
HLDAF-1 φ1200*2800mm 0.55kW / 0.55kW /
HLDAF-2.5 φ1500*2800mm 0.55kW 0.55kW*1 0.55kW /
HLDAF-5 3.5*2.0*2.0m 0.55kW 0.55kW*2 0.75kW /
HLDAF-10 4.5*2.1*2.0m 0.55kW 0.55kW*2 3.0kW /
HLDAF-15 5.0*2.1*2.1m 0.55kW 0.55kW*2 3.0kW /
HLDAF-20 5.5*2.1*2.1m 0.55kW 0.55kW*2 3.0kW /
HLDAF-30 7.0*2.1*2.1m 0.75kW 0.75kW*2 1.5kW 1.5kw
HLDAF-40 8.0*2.15*2.15m 0.75kW 0.75kW*2 2.2kW 2.2kW
HLDAF-50 9.0*2.15*2.15m 0.75kW 0.75kW*2 4.0kW 3.0KW
HLDAF-60 9.0*2.5*2.5m 0.75kW 0.75kW*2 4.0kW 4.0KW
HLDAF-75 9.0*3.0*2.5m 0.75kW 0.75kW*3 4.0kW 5.0KW
HLDAF-00 10.0*3.0*3.0m 0.75kW 0.75kW*3 5.5kW 5.5kW

NIHAO DAF Machine WORKING PRINCIPLE

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DAF WORKING PRINCIPLE

WORKING PRINCIPLE:

Air flotation separation and purification mainly plays the role of solid-liquid separation (at the same time, it can reduce COD, BOD, chromaticity, etc.). Air flotation mainly uses the micro bubbles in the dissolved air water generated by the dissolved air system to bond with the suspended flocs in the water, and the suspended matter rises to the water surface together with the micro bubbles to form flotsam, so that the suspended flocs in the water can be removed.

NIHAO DAF Equipment ADVANTAGE

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  • Total suspended solids (TSS) reduction up to 97%.
  • Chemical oxygen demand (COD) removal up to 85%.
  • Low-cost operation and maintenance.
  • Standard and customized units meet a variety of application and flow ranges.
  • Designed for ease of installation and use.
  • Suitable for high-salinity water.

CONTRAST :

  • NIHAO DAF EQUIPMENT ＞ OTHER COMPANY

  • NIHAO DAF EQUIPMENT ＞ OTHER COMPANY

  • NIHAO DAF EQUIPMENT ＞ OTHER COMPANY

NIHAO DEVELOPMENT AND MAIN ACHIEVEMENTS

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  • IN 2004

    Work on service ,sales and marketing in dissolved air flotation field.

  • 2005

    Design and launch lamella clarifier , and applied in semiconductor industry successfully.

  • 2008

    Develop and apply full coverage counter-flow skimming technology.

  • 2009

    Standardize DAF series as 2000 version.

  • 2010

    Develop integrated box type skimming system and high efficient sedimentation DAF，and obtain the patent accordingly.

  • 2011

    Display high efficient sedimentation DAF in IE EXPO Shanghai.

  • 2012

    Standardize the lamella clarifier as 2013 version.

  • 2019

    Standardize DAF series as 2020 version.

  • 2020

    Develop and launch the Roll flow DAF.

QUALIFICATION CERTIFICATE

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NIHAO DAF Machine Knowledge Extension

Operation and maintenance
The operation of a dissolved air flotation (DAF) machine typically involves the following steps:
Wastewater or process stream is fed into the DAF tank.
Recirculated water is pressurized and saturated with air.
The pressurized water is released into the DAF tank, creating tiny air bubbles that attach to the suspended solids.
The solids rise to the surface and form a floating layer, which can be skimmed off using a scraper or other device.
Maintenance of a DAF system typically involves regular inspection and cleaning of key components, including the tank, skimmer, and air saturation system. The skimmer should be checked and cleaned regularly to ensure that it is functioning properly and removing the maximum amount of solids. The air saturation system should be inspected and serviced periodically to ensure that it is providing the proper amount of air to the process stream. In addition, the tank should be cleaned on a regular basis to prevent buildup of solids and other contaminants. Proper maintenance of a DAF system can help ensure that it operates effectively and efficiently over time.

Benefits and limitation
The benefits of using dissolved air flotation (DAF) machines include their ability to effectively remove suspended solids, oils, and greases from wastewater or process streams, as well as their compact size, ease of operation, and low maintenance requirements.
However, DAF machines also have some limitations. They can be relatively expensive compared to other treatment methods, and their effectiveness can be affected by factors such as temperature, pH, and the type of solids present in the water. In addition, DAF systems may require the use of chemical coagulants and flocculants to achieve optimal performance, which can add to their overall cost and environmental impact.

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