DAF Systems for Wastewater Treatment

DAF Systems for Wastewater Treatment2022-07-11T15:30:54+00:00
DAF FPAC

Clearwater Industries works with SigmaDAF to manufacture dissolved air flotation clarifiers, also known as DAF systems, for industrial wastewater treatment.

Dissolved Air Flotation (DAF) clarifier systems are advanced separators for the treatment of industrial wastewater. DAF systems separate suspended solids, oils, and fats together with all the pollutants associated with them. This technology applies dissolved air in the form of microbubbles that drag the buoyant solids to the surface of the equipment where skimmers eliminate them. After this process, a clear effluent is discharged from the DAF system.

Our standard clarifiers are built with 304SS and are available in 316SS and other materials upon client request. They are easy to operate, fully automatized, and have a quick start-up procedure.

The DAF systems offered by Clearwater and Sigma cover a wide range of flowrates:

  • DAF FPAC (20 – 705 gpm)
  • DAF FPBC (20 – 1100 gpm)
  • DAF FPHF (880 – 4400 gpm)
  • Compact DAF (<20 gpm, plug&play)

Would you like to learn if a DAF system is the right fit for your application? Contact us and our team will work with you to find the right solution.

DAF SYSTEM PERFORMACE

When it comes to pollutants removal, the results achieved by our DAF systems are the following:

COD > 75%
BOD5 > 75%
Total Suspended Solids > 95%
Turbidity > 95%
Total Phosphorus > 90%
Total Nitrogen > 50%
Oils & Fats > 95%

As mentioned before, DAF clarifiers are applied to industrial wastewater to separate the following pollutants: suspended solids, oil, fats, colloids, and other insoluble pollutants associated (phosphorus, nitrogen, organic matter, etc.). To guarantee that the separation works effectively, the dissolved air flotation process must be complemented by a proper chemical coagulation-flocculation treatment, also designed and provided by Clearwater and Sigma. The pollutants float after applied microbubbles attach to the particles and raise them to the surface of the water, where they are scrapped and eliminated. Heavier solids settle on the bottom of the clarifier and are mechanically removed with an auger.

OUR DISSOLVED AIR FLOTATION (DAF) SYSTEMS

DAF FPAC

The DAF FPAC flotation equipment is a clarification system characterized by a large wastewater flotation area and cross-flow separation. The FPAC is a low-built cross-flow separator with a lot of free surface area for floated solids accumulation.

The FPAC treats small-to-medium flow rates with very high loads of contaminants (impurities, solids).

  • Capacity: 20-705 gpm
  • Achieve sludge with a dry solids content 3 to 4 times higher than a conventional system
  • Large surface area for floating sludge accumulation (8 lbs of dry matter treated per sq ft)
  • Floated and settled sludge discharge

Features:

  • Cross-flow system
  • Static thickener
  • Single movement separator rotates against the hydraulic flow to minimize the skimming distance and eliminate solids carry-over
  • Recirculation pump
  • Air manifold
  • Control panel to control the air supply to the aeration module and the sediment discharge valve
  • Sludge that settles to the bottom of the system is retained, concentrated, and partially dewatered with the shaftless auger system. The settled sludge is transported to the central discharge point and removed through an automatic pneumatic valve. The discharge cycle has a self-cleaning effect and any particle adhered to the DAF tank walls releases and discharges with the rest of the waste.
  • Low maintenance

Industrial Applications:

  • Sludge thickener
  • Slaughterhouse
  • Meat processing
  • Fish processing
  • Fruit & vegetable processing
  • Meal & food processing
  • Drink production
  • Rendering plants
  • Textile production
  • Pulp and paper industry
  • Increase FBR performance
SigmaDAF's FPAC clarifier onsite at a job.

DAF FPBC

The DAF FPBC flotation system is a high-profile separator designed to treat wastewater with low-to-medium loads of contaminants, even those with low buoyancy particles.

Thanks to the application of the plate separating technology, the FPBC DAF system obtains maximum separation efficiency with very low overflow rates. This makes the FPBC model one of the most efficient dissolved air flotation clarifiers in the market.

  • Capacity: 20-1,100 gpm
  • Achieve sludge with a dry solids content 3 to 4 times higher than a conventional system
  • Inclined plate pack increases surface area for solids separation
  • Floated and settled sludge discharge

Features:

  • Counter-current flow principle achieved through inclined plate pack
    • Plate pack technology increases separation efficiency for highly contaminated water
  • Single movement separator rotates against the hydraulic flow to minimize the skimming distance and eliminate solids carry-over
  • Recirculation pump
  • Air manifold
  • Control panel to control the air supply to the aeration module and the sediment discharge valve
  • Sludge that settles to the bottom of the system is retained, concentrated, and partially dewatered with the shaftless auger system. The settled sludge is transported to the central discharge point and removed through an automatic pneumatic valve. The discharge cycle has a self-cleaning effect and any particle adhered to the DAF tank walls releases and discharges with the rest of the waste.
  • Low maintenance

Industrial Applications:

  • Power & energy industries
  • Slaughterhouse
  • Meat processing
  • Fish processing
  • Fruit & vegetable processing
  • Meal & food processing
  • Drink production
  • Petrochemical industry
  • Textile production
  • Pulp and paper industry
  • MBBR treatment

DAF FPHF

The DAF FPHF is a separation system that represents an improvement over the existing lamella plate technologies; it uses a combination of cross-flow and counter-current-flow for optimized separation. The FPHF treats large flows with medium-to-large loads of contaminants (impurities, solids).

 

  • Capacity: 880-4,400 gpm
  • Sludge with a dry solids content 3 to 4 times higher than a conventional system
  • Inclined plate pack increases surface area for solids removal
  • Floated and settled sludge discharge

Features:

  • Plate pack technology with a combination of cross-flow and counter-current flow increase separation efficiency
  • Single movement separator rotates against the hydraulic flow to minimize the skimming distance and eliminate solids carry-over
  • Recirculation pump
  • Air manifold
  • Control panel to control the air supply to the aeration module and the sediment discharge valve
  • Sludge that settles to the bottom of the system is retained, concentrated, and partially dewatered with the shaftless auger system. The settled sludge is transported to the central discharge point and removed through an automatic pneumatic valve. The discharge cycle has a self-cleaning effect and any particle adhered to the DAF tank walls releases and discharges with the rest of the waste.
  • Low maintenance

Industrial Applications:

  • Power & energy industries
  • Oil refineries
  • Petrochemical industry
  • Slaughterhouse
  • Food processing plants
  • Dairy industry
  • Manure processing
  • Pulp and paper industries
  • MBBR Treatment
  • Increase FBR performance
SigmaDAF's FPHF DAF Clarifier outside at a job site.

COMPACT DAF

The COMPACT DAF is a robust, flexible, efficient, and easy-to-operate system for industrial wastewater treatment.

The “plug&play” technology is efficient and easy to operate; an operator only needs to adjust the chemical dosing and pump flow through a modern and complete control system to start operating the Compact DAF solution efficiently. The working parameters are adjusted from a PLC system with remote control option.

The COMPACT DAF equipment has a high removal performance of organic load, solids, oils and fats, and other wastewater pollutants.A rendered image of a dissolved flotation clarifier skid with a metal tank, control panel, and plastic tank.

Benefits

  • Plug & Play solution
  • Maximum reliability and durability
  • Constant effluent quality
  • High pollutant removal efficiency
  • Easy to operate
  • Quick Start-up
  • Portable. Capable of installation in containers or on platforms
  • Low maintenance requirements
  • No civil work needed
A DAF clarifier tank on a skid with a control panel, flocculator tubes, a plastic tank and pumps.

Compact DAF Includes:

  • DAF consists of a rectangular tank, skimmer, settled sludge extraction valve, air supply valves, pneumatic panel, and recirculation pump
  • Flocculator Tubes: In-line coagulation-flocculation system
  • Coagulant dosing pump
  • Caustic soda dosing pump
  • Polymer flocculant dosing pump
  • Polymer flocculant preparation unit
  • pH sensor and flow meter
  • Feed pump, sludge pump, and levels
  • Skid-type platform
  • State-of-the-art electrical control panel – Fully intuitive and user-friendly interface

The Compact DAF system is designed and manufactured to meet the discharge standards for your specific effluent and industry.

A DAF clarifier tank on a skid with flocculator tubes, a plastic tank and pumps.

A compact DAF clarifier with a control panel, flocculator tubes, chemical totes, and forklifts in the background.

INDUSTRIES AND APPLICATIONS

Clearwater and SigmaDAF have extensive experience working with a wide range of industries in the US and many other countries all over the world. 

The scope of applications of our DAF systems is virtually unlimited, but here are some of the most common industries that we have worked with:

This knowledge and expertise allow us to provide our customers with the most efficient technologies and solutions for the treatment of the wastewater generated in their production processes.

CASE STUDIES

Installation of a DAF Clarifier as Part of an FBR Process for the Treatment of Wastewater from the Meat Industry

By |June 18th, 2022|Case Studies, DAF Case Studies|

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Reuse of Wastewater in the Cosmetic Industry: Full Treatment Process Applying CAF, DAF, & MBR

By |April 19th, 2022|Case Studies, DAF Case Studies|

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