750 m³/day DAF System for Industrial Food Wastewater Treatment
It is a physical-chemical wastewater treatment unit designed to separate fats, oils, grease, suspended solids, and associated organic pollutants from food-processing wastewater.
Hinada a competitive factory for a turnkey, containerized, or skid-mounted Dissolved Air Flotation (DAF) system, and integrated wastewater treatment solutions for food and beverage facilities. A project-specific treatment package can combine screening, equalization, pH adjustment, coagulation, flocculation, dissolved air flotation, and sludge handling.
Product Specification
General Description
- Wastewater Source: Industrial food processing and equipment wash water (high fats, oils, and grease).
- Daily Flow Volume: Max 750 m³/day.
- Hourly Design Flow Rate: 35 m³/hour to 40.0 m³/hour (depending on contamination)
Influent Water Quality Profile (Raw Water)These ranges are not necessarily correlated. Actual characteristics vary with raw materials, production processes, cleaning chemicals, and product losses.
- pH Range: 6.0 – 9.5
- COD (Chemical Oxygen Demand): 2,780 – 4,370 mg/l
- BOD5 (Biochemical Oxygen Demand): 1821 – 2,951 mg/l
- SS (Suspended Solids): 800 – 1116 mg/l
- FOG (Fats, Oils, & Grease): 153 – 506 mg/l
- Wastewater Temperature: < 35°C
- pH: 6.0 – 10.0
- COD: < 3,200 mg/l (Average 24h sample)
- BOD5: < 1,600 mg/l
- SS: < 100 mg/l
- FOG: < 20 mg/l
The illustrated DAF expectations correspond to approximately:
**TSS removal:** 80–90%
**FOG removal:** 80–90%
**COD removal:** 20–50%
**BOD₅ removal:** 10–35%
Results depend on pollutant form, chemical selection, operating conditions, and wastewater variability. Strongly emulsified oil and predominantly soluble COD may require additional treatment.
How the DAF System Works
Step 1: Screening and Equalization
Screens remove food debris and other coarse materials. The equalization tank balances flow and water quality before chemical treatment.
Step 2: pH Adjustment and Coagulation
Acid or alkali is added when necessary to establish appropriate treatment conditions. A selected coagulant destabilizes colloidal particles and helps capture dispersed contaminants.
The optimal pH and chemical type must be determined through testing.
Step 3: Flocculation
Gentle mixing and polymer addition help smaller particles form larger flocs that can attach to air bubbles.
Excessive mixing can break flocs and reduce flotation performance.
Step 4: Dissolved Air Flotation
A portion of clarified water is pressurized and contacted with air. When released into the flotation zone, the pressure reduction produces fine bubbles.
These bubbles attach to flocs and lift them toward the surface.
Step 5: Sludge Removal and Effluent Collection
A surface scraper transfers floated sludge to a collection hopper. Clarified water exits through the outlet arrangement and proceeds to the next treatment stage.
Bottom solids should also be removed where the wastewater produces settling material.
Dissolved Air Flotation Machine Specification
Hinada the leading manufacturer of DAF System for industrial wastewater treatment according to project requirement. To make the suitable proposal, we need know more details of project included: capacity, wastewater source,wastewater quality (SS,BOD,COD,FOG etc ).
Dissolved Air Flotation System main feature
DAF System for Food Processing Application
– Dairy and cheese processing
– Meat and poultry processing
– Seafood processing
– Edible oil and prepared-food production
– Industrial bakery rinsing and equipment wash water (high fats, oils, and grease)and confectionery manufacturing
– Vegetable and fruit processing
– Food production facilities with significant washdown wastewater
DAF System Benifits
Dissolved Air Flotation System with the purpose to reduce and remove or low down the COD, TSS and FOG from industrial wastewater. The DAF system utilises fine air bubbles, also known as ‘White Water’, which attach themselves to the suspended material within the waste stream, increasing buoyancy and floating them to the surface. The floated solids are then removed by a simple but effective scraper mechanism. More often than not chemical conditioning is used to increase the effectiveness of the Dissolved Air Flotation process.
The Dissolved Air Flotation process uses the most reliable and positive method of producing air bubbles of the optimum size. This is done by dissolving air into water under pressure and then dropping the pressure on entry to the DAF cell using a controlled nozzle orifice. As the pressure is reduced, the air naturally comes out of solution in the form of micro bubbles.
* Hinada has 10 Years custom DAF System for wastewater treatment designing experiences, we can design and install as your any project requirements, reduce your projects investing cost.
* Standard designs according your application, requirement and budget, we are one of leading DAF system manufacturers in China, we can produce and accept any special requirement orders.
Packaging
Plywood case packed or in container loading.
Our Service
* Hinada has 10 Years custom DAF System for wastewater treatment designing experiences, we can design and install as your any project requirements, reduce your projects investing cost.
* Standard designs according your application, requirement and budget, we are one of leading DAF system manufacturers in China, we can produce and accept any special requirement orders.
* Offer installation and commissioning support.
- Specifications
-
Product Specification
General Description
Wastewater Design Parameters- Wastewater Source: Industrial food processing and equipment wash water (high fats, oils, and grease).
- Daily Flow Volume: Max 750 m³/day.
- Hourly Design Flow Rate: 35 m³/hour to 40.0 m³/hour (depending on contamination)
Influent Water Quality Profile (Raw Water)These ranges are not necessarily correlated. Actual characteristics vary with raw materials, production processes, cleaning chemicals, and product losses.
- pH Range: 6.0 – 9.5
- COD (Chemical Oxygen Demand): 2,780 – 4,370 mg/l
- BOD5 (Biochemical Oxygen Demand): 1821 – 2,951 mg/l
- SS (Suspended Solids): 800 – 1116 mg/l
- FOG (Fats, Oils, & Grease): 153 – 506 mg/l
- Wastewater Temperature: < 35°C
Required Effluent Discharge Limits (Treatment Goals), At the selected calculation basis, daily incoming loads are approximately- pH: 6.0 – 10.0
- COD: < 3,200 mg/l (Average 24h sample)
- BOD5: < 1,600 mg/l
- SS: < 100 mg/l
- FOG: < 20 mg/l
The illustrated DAF expectations correspond to approximately:
**TSS removal:** 80–90%
**FOG removal:** 80–90%
**COD removal:** 20–50%
**BOD₅ removal:** 10–35%
Results depend on pollutant form, chemical selection, operating conditions, and wastewater variability. Strongly emulsified oil and predominantly soluble COD may require additional treatment.
How the DAF System Works
Step 1: Screening and Equalization
Screens remove food debris and other coarse materials. The equalization tank balances flow and water quality before chemical treatment.
Step 2: pH Adjustment and Coagulation
Acid or alkali is added when necessary to establish appropriate treatment conditions. A selected coagulant destabilizes colloidal particles and helps capture dispersed contaminants.
The optimal pH and chemical type must be determined through testing.
Step 3: Flocculation
Gentle mixing and polymer addition help smaller particles form larger flocs that can attach to air bubbles.
Excessive mixing can break flocs and reduce flotation performance.
Step 4: Dissolved Air Flotation
A portion of clarified water is pressurized and contacted with air. When released into the flotation zone, the pressure reduction produces fine bubbles.
These bubbles attach to flocs and lift them toward the surface.
Step 5: Sludge Removal and Effluent Collection
A surface scraper transfers floated sludge to a collection hopper. Clarified water exits through the outlet arrangement and proceeds to the next treatment stage.
Bottom solids should also be removed where the wastewater produces settling material.
Dissolved Air Flotation Machine Specification
Hinada the leading manufacturer of DAF System for industrial wastewater treatment according to project requirement. To make the suitable proposal, we need know more details of project included: capacity, wastewater source,wastewater quality (SS,BOD,COD,FOG etc ).
Dissolved Air Flotation System main feature
- Application
-
DAF System for Food Processing Application
– Dairy and cheese processing
– Meat and poultry processing
– Seafood processing
– Edible oil and prepared-food production
– Industrial bakery rinsing and equipment wash water (high fats, oils, and grease)and confectionery manufacturing
– Vegetable and fruit processing
– Food production facilities with significant washdown wastewater
- Benefits
-
DAF System Benifits
Dissolved Air Flotation System with the purpose to reduce and remove or low down the COD, TSS and FOG from industrial wastewater. The DAF system utilises fine air bubbles, also known as ‘White Water’, which attach themselves to the suspended material within the waste stream, increasing buoyancy and floating them to the surface. The floated solids are then removed by a simple but effective scraper mechanism. More often than not chemical conditioning is used to increase the effectiveness of the Dissolved Air Flotation process.
The Dissolved Air Flotation process uses the most reliable and positive method of producing air bubbles of the optimum size. This is done by dissolving air into water under pressure and then dropping the pressure on entry to the DAF cell using a controlled nozzle orifice. As the pressure is reduced, the air naturally comes out of solution in the form of micro bubbles.
* Hinada has 10 Years custom DAF System for wastewater treatment designing experiences, we can design and install as your any project requirements, reduce your projects investing cost.
* Standard designs according your application, requirement and budget, we are one of leading DAF system manufacturers in China, we can produce and accept any special requirement orders. - Packaging
-
Packaging
Plywood case packed or in container loading.
- Our Service
-
Our Service
* Hinada has 10 Years custom DAF System for wastewater treatment designing experiences, we can design and install as your any project requirements, reduce your projects investing cost.
* Standard designs according your application, requirement and budget, we are one of leading DAF system manufacturers in China, we can produce and accept any special requirement orders.
* Offer installation and commissioning support. - DAF System Video
-
Send Inquiry To Us
What is dissolved air flotation (DAF)?
Dissolved Air Flotation System with the purpose to reduce and remove or low down the COD, TSS and FOG from industrial wastewater. The DAF system utilises fine air bubbles, also known as ‘White Water’, which attach themselves to the suspended material within the waste stream, increasing buoyancy and floating them to the surface. The floated solids are then removed by a simple but effective scraper mechanism. More often than not chemical conditioning is used to increase the effectiveness of the Dissolved Air Flotation process.
The Dissolved Air Flotation process uses the most reliable and positive method of producing air bubbles of the optimum size. This is done by dissolving air into water under pressure and then dropping the pressure on entry to the DAF cell using a controlled nozzle orifice. As the pressure is reduced, the air naturally comes out of solution in the form of micro bubbles.
DAF is used in municipal wastewater treatment, industrial wastewater treatment, In these treatment systems, DAF is used to remove a diverse range of pollutants as listed in Table 1. These include suspended solids, organic matter, hydrocarbons from the oil and gas industry, phosphorus and nitrogen from the food and beverage industry, and minerals and metals from the mining industry.
How does a dissolved air flotation system work?
In a DAF system, compressed air is pumped into the flocculation chamber of the wastewater system and the compressed air is released at atmospheric pressure. The released air forms tiny bubbles that adhere to the suspended matter. The air bubble-suspended matter floats to the surface of the water (called the floc) and can be removed by a skimming device.
Coagulantor flocculants are added to allow suspended solids and colloidal solids to clump together for their removal by the DAF system. Polyelectrolyte or polymers could be included in situations of reduced performance of the DAF system if the floc is fragile and cannot be removed entirely by skimming.
Coagulants include alum, poly aluminum chloride, poly aluminum sulfate, ferric chloride, bentonite, and organic polymers. The use of these chemicals depend on what needs to be removed. For example, a study showed that monomeric aluminum was more efficient in removing suspended solids and soluble chemical oxygen demand (COD) than polymeric or colloidal aluminum. However, polymeric or colloidal aluminum were more effective in removing soluble silica.
The DAF System Advantages:
- Light particles such as algae that are difficult to settle can be removed by DAF.
- DAF treatment can remove light particles of low concentrations unlike sedimentation that requires a higher concentration of particles to settle for their removal. DAF treatment can be operated using much higher surface loading rates (SLR) than sedimentation.
- DAF treatment leads to clarified water by removing pollutants to assist the water in meeting regulatory standards and depending on the wastewater treatment system, for safe discharge of the treated water into the water bodies.
- Chemical oxygen demand (COD) and biological oxygen demand (BOD) removal.
- Helps drinking water achieve clarity and contributes to preventing issues related to taste, odor, and the possible formation of disinfection byproducts during the water treatment.
