Industrial Wastewater Air Flotation Unit – Dissolved Air Flotation (DAF) For Solid-Liquid Separation
The LK-GX series dissolved air flotation (DAF) system efficiently removes suspended solids, oil, BOD, COD, and metals from wastewater. Modular design with capacities from 1–300 m³/h for industrial and municipal treatment.
Description
LK-GX series air flotation unit is based on the principle that by dissolving a large number of 10-30μm micro-bubbles in water, a large number of micro-bubbles are adhered to the "alum flower" of the wastewater, which makes the flocs float, and then the pollutants in the water (suspended matter, oil, grease, BOD, COD and metals) can be quickly removed to achieve the purpose of water purification, (suspended solids, oil, grease, BOD, COD and metal) to achieve the purpose of water purification, the equipment flocculation, separation, water collection, water in one of the modular design, the treatment capacity covers 1m³/h~300m³/h.
Video Introduction
Scope of application
Usually air flotation unit is suitable for solid-liquid separation or liquid-liquid separation of water treatment, widely used in oil refining, slaughtering, printing and dyeing, chemical industry, electroplating, brewing, vegetable oil production and refining and other industrial wastewater and municipal sewage treatment.
Industrial wastewater treatment
Petrochemical industry: oily wastewater, emulsion wastewater treatment
Paper industry: removal of fibers, suspended solids, ink, etc.
Printing and dyeing industry: removal of dye particles, colloidal substances
Food and beverage industry: removal of proteins, starch, oil and grease, and other organic matter
Slaughtering and breeding industry: removal of grease, blood, hair, etc.
Electroplating industry: removal of heavy metal hydroxide flocs
Leather industry: removal of pollutants in the tanning process
Municipal wastewater treatment
Pre-treatment stage: remove grease, hair, fiber, etc. in raw water
Deep treatment stage: remove suspended solids and colloids left after biochemical treatment
Working principle diagram of the air flotation unit
Installation position
Pre-treatment section: usually placed after the conditioning tank, before the biochemical treatment
Depth treatment section: placed after the secondary sedimentation tank, before the disinfection process
Different types of air flotation machine can be selected according to the scale of treatment and the characteristics of the water quality
Functions and Advantages
High-efficiency solid-liquid separation: through the generation of micro-bubbles with a diameter of 10-30 μm, and the suspended matter in the wastewater (such as oil and grease, fibers, colloid, etc.) to form the "bubbles - particles" composite, and by means of the buoyancy force Rapidly float to the surface of the water to form a scum layer, and then through the scraper to achieve separation.
Water purification: can effectively remove suspended solids (SS), oil, algae and other pollutants in sewage, reduce chemical oxygen demand (COD), biochemical oxygen demand (BOD) and other indicators to improve water quality.
Resource recovery: in the field of food processing, oil and grease industry, etc., it can recover useful substances in wastewater (such as oil, protein, etc.), and realize the reuse of resources.
High treatment efficiency: microbubbles have large specific surface area, and the adsorption efficiency is 3-5 times of the traditional sedimentation, especially for the treatment of low-density pollutants (e.g., oil and grease, fibers).
Adaptable: it can deal with the wastewater whose SS concentration is as high as 5,000 mg/L, and is resistant to pH value and temperature fluctuation. pH value, temperature fluctuations, high tolerance for a variety of water quality conditions.
Energy saving and consumption reduction: the energy consumption of dissolved air flotation machine per unit of treatment capacity is only 1/3 of the traditional sedimentation tank, and the floor space is reduced by more than 40%, reducing the operating costs.
Flexible modular design: the equipment can be customized according to the scale of treatment, from 1m³/h to 300m³/h can be standardized production, easy to upgrade and expand capacity.
Simple operation and maintenance: the process and equipment structure is simple, high degree of automation, reducing manual operation and maintenance workload.
High concentration of scum: High concentration of scum, low sludge production, easy to dewater and reduce the cost of sludge disposal.
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