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DAF Disolved Air Flotation - ClearFox

Intelligent Dissolved air flotation in container or on racks produced by: Description The ClearFox DAF plant is fully automated. Feedwater is supplied to the DAF module via non-clogging cavity pump from client`s balancing tanks or ClearFox buffer tanks. Pre- aerated buffers are advisable for certain applications. The wastewater firstly passes through a pH-controlled inline pipe system where ...Intelligent Dissolved air flotation in container or on racks produced by: Description The ClearFox DAF plant is fully automated. Feedwater is supplied to the DAF module via non-clogging cavity pump from client`s balancing tanks or ClearFox buffer tanks. Pre- aerated buffers are advisable for certain applications. The wastewater firstly passes through a pH-controlled inline pipe system where ...

Dissolved Air Flotation Systems (DAF) Remove TSS, BOD ...

Dissolved Air Flotation is based on a physical / chemical process, where the injection of air into the water stream with chemical assistance causes the particles/flocks to float to the surface. This floating sludge layer is then automatically and continuously removed by a scraper mechanism. The DAF system will produce a treated effluent virtually free of TSS, FOG and remove a large portion of the BOD.Dissolved Air Flotation is based on a physical / chemical process, where the injection of air into the water stream with chemical assistance causes the particles/flocks to float to the surface. This floating sludge layer is then automatically and continuously removed by a scraper mechanism. The DAF system will produce a treated effluent virtually free of TSS, FOG and remove a large portion of the BOD.

DAF DISSOLVED AIR FLOTATION

DAF Brochure 1 of effluent discharge water with air. The vegetable oils, animal processing waste, river DAF Dissolved Air Flotation Systems The DAF Dinky DAF Series Dissolved Air Flotation systems are designed to remove petroleum products, FOG, TSS, BOD, COD and other contaminants in a wide variety of industries applications.DAF Brochure 1 of effluent discharge water with air. The vegetable oils, animal processing waste, river DAF Dissolved Air Flotation Systems The DAF Dinky DAF Series Dissolved Air Flotation systems are designed to remove petroleum products, FOG, TSS, BOD, COD and other contaminants in a wide variety of industries applications.

HydroFloat™ Series Dissolved Air Flotation (DAF) System

HydroFlo Tech' dissolved air flotation technology, or "DAF", is an effective, economical process for removing hard to separate suspended solids from wastewater and also for resolving overall water clarity issues. A dissolved air flotation (DAF) system resolves suspended solids and clarity issues by reintroducing a slip stream of treated water (from the system's effluent) back to the system's influent. This pressurized, recycled water HydroFlo Tech' dissolved air flotation technology, or "DAF", is an effective, economical process for removing hard to separate suspended solids from wastewater and also for resolving overall water clarity issues. A dissolved air flotation (DAF) system resolves suspended solids and clarity issues by reintroducing a slip stream of treated water (from the system's effluent) back to the system's influent. This pressurized, recycled water

Dissolved air flotation - Wikipedia

Dissolved air flotation (DAF) is a water treatment process that clarifies wastewaters (or other waters) by the removal of suspended matter such as oil or solids. The removal is achieved by dissolving air in the water or wastewater under pressure and then releasing the air at atmospheric pressure in a flotation tank basin. The released air forms tiny bubbles which adhere to the suspended matter causing the suspended matter to float to the surface of the water where it may then be removed by a skimming device. Dissolved air flotation (DAF) is a water treatment process that clarifies wastewaters (or other waters) by the removal of suspended matter such as oil or solids. The removal is achieved by dissolving air in the water or wastewater under pressure and then releasing the air at atmospheric pressure in a flotation tank basin. The released air forms tiny bubbles which adhere to the suspended matter causing the suspended matter to float to the surface of the water where it may then be removed by a skimming device.

Dissolved Air Flotation - Water Treatment - Siltbuster

DAF units are specifically designed to reduce suspended solids which are buoyant in nature (or exhibit near neutral buoyancy) or which have a propensity to float under certain conditions. These can include fats, oils and greases (FOGs), organic matter, algae, etc. contained in water or wastewater originating from processes/applications such as:DAF units are specifically designed to reduce suspended solids which are buoyant in nature (or exhibit near neutral buoyancy) or which have a propensity to float under certain conditions. These can include fats, oils and greases (FOGs), organic matter, algae, etc. contained in water or wastewater originating from processes/applications such as:

Dissolved Air Flotation (DAF) Max Efficiency – MAK Water

20 行  The MAK Water Dissolved Air Flotation (DAF) system is a superior counter current system 20 行  The MAK Water Dissolved Air Flotation (DAF) system is a superior counter current system

DAF Disolved Air Flotation - ClearFox

Intelligent Dissolved air flotation in container or on racks produced by: Description The ClearFox DAF plant is fully automated. Feedwater is supplied to the DAF module via non-clogging cavity pump from client`s balancing tanks or ClearFox buffer tanks. Pre- aerated buffers are advisable for certain applications. The wastewater firstly passes through a pH-controlled inline pipe system where ...Intelligent Dissolved air flotation in container or on racks produced by: Description The ClearFox DAF plant is fully automated. Feedwater is supplied to the DAF module via non-clogging cavity pump from client`s balancing tanks or ClearFox buffer tanks. Pre- aerated buffers are advisable for certain applications. The wastewater firstly passes through a pH-controlled inline pipe system where ...

ClearFox® DAF - clearfox DAF

Dissolved Air Flotation. The ClearFox® DAF is a modular unit, designed for highly efficient treatment of any type of industrial wastewater. With advanced technology, we can achieve higher removal rates of pollutants than competitor products. The clearfox DAF is a flexible solution that can be applied to a wide range of wastewater applications.Dissolved Air Flotation. The ClearFox® DAF is a modular unit, designed for highly efficient treatment of any type of industrial wastewater. With advanced technology, we can achieve higher removal rates of pollutants than competitor products. The clearfox DAF is a flexible solution that can be applied to a wide range of wastewater applications.

Dissolved Air Flotation DAF Equipment Waste Water

Dissolved air flotation (DAF) is a physical/chemical waste water treatment process that clarifies waste waters by the removal of suspended solids along oil grease. The removal is achieved by dissolving air in the water or wastewater under pressure and then releasing the air at atmospheric pressure in a flotation tank or basin. The released air forms tiny bubbles which adhere to the suspended ...Dissolved air flotation (DAF) is a physical/chemical waste water treatment process that clarifies waste waters by the removal of suspended solids along oil grease. The removal is achieved by dissolving air in the water or wastewater under pressure and then releasing the air at atmospheric pressure in a flotation tank or basin. The released air forms tiny bubbles which adhere to the suspended ...

Dissolved Air Flotation for Water Wastewater

For process water and wastewater treatment, achieve high solids capture rate in advanced, compact DAF designs. Meet strict industry standards and facilitate compliance to environmental regulations. The patented poseidon* DAF uses dissolved air flotation technology to separate fine dispersed particles from process water and wastewater to reach your desired specifications.For process water and wastewater treatment, achieve high solids capture rate in advanced, compact DAF designs. Meet strict industry standards and facilitate compliance to environmental regulations. The patented poseidon* DAF uses dissolved air flotation technology to separate fine dispersed particles from process water and wastewater to reach your desired specifications.

Dissolved Air Flotation (DAF) - Ecologix Systems

Dissolved air flotation (DAF) is a water treatment process that clarifies wastewaters (or other waters) by the removal of suspended matter such as oil or solids. The removal is achieved by dissolving air in the water or wastewater under pressure and then releasing the air at atmospheric pressure in a flotation tank or basin. The released air forms tiny bubbles which adhere to the suspended ...Dissolved air flotation (DAF) is a water treatment process that clarifies wastewaters (or other waters) by the removal of suspended matter such as oil or solids. The removal is achieved by dissolving air in the water or wastewater under pressure and then releasing the air at atmospheric pressure in a flotation tank or basin. The released air forms tiny bubbles which adhere to the suspended ...

Dissolved Air Flotation (DAF) – AWC Water

DISSOLVED AIR FLOTATION WATER TREATMENT PLANTS. AWC Water Solutions offers packaged water treatment plants based on dissolved air flotation (DAF) technology. These plants excel in treating lake and reservoir water containing high levels of color, algae and turbidity, as well as cold waters and high levels of iron and manganese. Our DAF plants are custom-designed to meet our clients ...DISSOLVED AIR FLOTATION WATER TREATMENT PLANTS. AWC Water Solutions offers packaged water treatment plants based on dissolved air flotation (DAF) technology. These plants excel in treating lake and reservoir water containing high levels of color, algae and turbidity, as well as cold waters and high levels of iron and manganese. Our DAF plants are custom-designed to meet our clients ...

Dissolved Air Flotation (DAF) Systems for Wastewater

Dissolved Air Flotation (DAF) is a physical chemical separation technique used to remove suspended solids and fats, oils and grease from the wastewater. Using a Dissolved Air Flotation system for wastewater treatment is a common technique across a range of markets; including the food and beverage, plastics recycling and pulp and paper industries, to name a few. Aerofloat has patented Dissolved ...Dissolved Air Flotation (DAF) is a physical chemical separation technique used to remove suspended solids and fats, oils and grease from the wastewater. Using a Dissolved Air Flotation system for wastewater treatment is a common technique across a range of markets; including the food and beverage, plastics recycling and pulp and paper industries, to name a few. Aerofloat has patented Dissolved ...

Produced Water Treatment Andmir

Dissolved Air/Gas Flotation (DAF/DGF) is a liquid/solid separation process that clarifies wastewaters by the removal of suspended matter such as oil and/or solids. The removal of oil and or solids is achieved by dissolving gas in the water or wastewater under pressure and then releasing the gas at atmospheric pressure in a flotation tank. The released gas forms tiny bubbles which adhere to the ...Dissolved Air/Gas Flotation (DAF/DGF) is a liquid/solid separation process that clarifies wastewaters by the removal of suspended matter such as oil and/or solids. The removal of oil and or solids is achieved by dissolving gas in the water or wastewater under pressure and then releasing the gas at atmospheric pressure in a flotation tank. The released gas forms tiny bubbles which adhere to the ...

Dissolved Air Flotation - Kemco Systems

Dissolved air flotation is a water treatment process that clarifies wastewater by removal of suspended solids, oils, greases, BOD, COD, and metals. This is achieved by dissolving air in the wastewater under pressure and then releasing the air at atmospheric pressure in a flotation tank. The released air forms tiny bubbles which adhere to the suspended matter causing it to float to the surface ...Dissolved air flotation is a water treatment process that clarifies wastewater by removal of suspended solids, oils, greases, BOD, COD, and metals. This is achieved by dissolving air in the wastewater under pressure and then releasing the air at atmospheric pressure in a flotation tank. The released air forms tiny bubbles which adhere to the suspended matter causing it to float to the surface ...

Design and Sizing of a Dissolved Air Flotation Separator

If using the smallest possible plate spacing were the answer to building the most efficient DAF, we would be building dissolved air flotation systems with 1/8" plate spacing, or smaller. Unfortunately, this is not the answer. Other considerations come into play. In actual practice, a plate spacing of 2" is the smallest plate spacing recommended. Many other issues come into play, such as ...If using the smallest possible plate spacing were the answer to building the most efficient DAF, we would be building dissolved air flotation systems with 1/8" plate spacing, or smaller. Unfortunately, this is not the answer. Other considerations come into play. In actual practice, a plate spacing of 2" is the smallest plate spacing recommended. Many other issues come into play, such as ...

DAF Disolved Air Flotation - ClearFox

Intelligent Dissolved air flotation in container or on racks produced by: Description The ClearFox DAF plant is fully automated. Feedwater is supplied to the DAF module via non-clogging cavity pump from client`s balancing tanks or ClearFox buffer tanks. Pre- aerated buffers are advisable for certain applications. The wastewater firstly passes through a pH-controlled inline pipe system where ...Intelligent Dissolved air flotation in container or on racks produced by: Description The ClearFox DAF plant is fully automated. Feedwater is supplied to the DAF module via non-clogging cavity pump from client`s balancing tanks or ClearFox buffer tanks. Pre- aerated buffers are advisable for certain applications. The wastewater firstly passes through a pH-controlled inline pipe system where ...

Dissolved Air Flotation for Water Wastewater

For process water and wastewater treatment, achieve high solids capture rate in advanced, compact DAF designs. Meet strict industry standards and facilitate compliance to environmental regulations. The patented poseidon* DAF uses dissolved air flotation technology to separate fine dispersed particles from process water and wastewater to reach your desired specifications.For process water and wastewater treatment, achieve high solids capture rate in advanced, compact DAF designs. Meet strict industry standards and facilitate compliance to environmental regulations. The patented poseidon* DAF uses dissolved air flotation technology to separate fine dispersed particles from process water and wastewater to reach your desired specifications.

DAF–dissolved air flotation: Potential applications in the ...

01/02/2007  DAF or dissolved air flotation, pressure flotation, or flotation with microbubbles (30–100 μm) is the most utilized process removing a number of pollutants, among others, colloids, fines and ultrafines particles, precipitates, ions, microorganisms, proteins, dispersed and emulsified oils in water (Rubio et al., 2002a, Rubio et al., 2002b, Ross et al., 2003, Carissimi and Rubio, 2005a, Matis ...01/02/2007  DAF or dissolved air flotation, pressure flotation, or flotation with microbubbles (30–100 μm) is the most utilized process removing a number of pollutants, among others, colloids, fines and ultrafines particles, precipitates, ions, microorganisms, proteins, dispersed and emulsified oils in water (Rubio et al., 2002a, Rubio et al., 2002b, Ross et al., 2003, Carissimi and Rubio, 2005a, Matis ...

How Dissolved Air flotation Systems for Water Treatment ...

13/02/2018  Dissolved air flotation process for water clarification occurs in a float tank dosed with a coagulant – such as aluminum sulfate or ferric chlorides. The coagulant enables the particles to form larger clusters for safe and effective removal. Water leaving the DAF tank is pumped into a pressure vessel (air drum) where the compressed air is present, resulting in saturation of the pressurized ...13/02/2018  Dissolved air flotation process for water clarification occurs in a float tank dosed with a coagulant – such as aluminum sulfate or ferric chlorides. The coagulant enables the particles to form larger clusters for safe and effective removal. Water leaving the DAF tank is pumped into a pressure vessel (air drum) where the compressed air is present, resulting in saturation of the pressurized ...

Dissolved Air Flotation (DAF) - Ecologix Systems

Dissolved air flotation (DAF) is a water treatment process that clarifies wastewaters (or other waters) by the removal of suspended matter such as oil or solids. The removal is achieved by dissolving air in the water or wastewater under pressure and then releasing the air at atmospheric pressure in a flotation tank or basin. The released air forms tiny bubbles which adhere to the suspended ...Dissolved air flotation (DAF) is a water treatment process that clarifies wastewaters (or other waters) by the removal of suspended matter such as oil or solids. The removal is achieved by dissolving air in the water or wastewater under pressure and then releasing the air at atmospheric pressure in a flotation tank or basin. The released air forms tiny bubbles which adhere to the suspended ...

Dissolved Air Flotation (DAF) – AWC Water

DISSOLVED AIR FLOTATION WATER TREATMENT PLANTS. AWC Water Solutions offers packaged water treatment plants based on dissolved air flotation (DAF) technology. These plants excel in treating lake and reservoir water containing high levels of color, algae and turbidity, as well as cold waters and high levels of iron and manganese. Our DAF plants are custom-designed to meet our clients ...DISSOLVED AIR FLOTATION WATER TREATMENT PLANTS. AWC Water Solutions offers packaged water treatment plants based on dissolved air flotation (DAF) technology. These plants excel in treating lake and reservoir water containing high levels of color, algae and turbidity, as well as cold waters and high levels of iron and manganese. Our DAF plants are custom-designed to meet our clients ...

Treatment of Oilfield Produced Water with Dissolved Air ...

Dissolved air flotation (DAF) was the primary treatment technology investigated in this study for removing oil and grease from synthetic produced water. By itself, DAF achieved less than 70% oil and grease (OG) removal, and was not able to achieve a clarified effluent OG concentration of 30 mg/L required for regulatory discharge limits. At an optimum condition of 20 mg/L ferric chloride (FeCl3 ...Dissolved air flotation (DAF) was the primary treatment technology investigated in this study for removing oil and grease from synthetic produced water. By itself, DAF achieved less than 70% oil and grease (OG) removal, and was not able to achieve a clarified effluent OG concentration of 30 mg/L required for regulatory discharge limits. At an optimum condition of 20 mg/L ferric chloride (FeCl3 ...

Produced Water Treatment Andmir

Dissolved Air/Gas Flotation (DAF/DGF) is a liquid/solid separation process that clarifies wastewaters by the removal of suspended matter such as oil and/or solids. The removal of oil and or solids is achieved by dissolving gas in the water or wastewater under pressure and then releasing the gas at atmospheric pressure in a flotation tank. The released gas forms tiny bubbles which adhere to the ...Dissolved Air/Gas Flotation (DAF/DGF) is a liquid/solid separation process that clarifies wastewaters by the removal of suspended matter such as oil and/or solids. The removal of oil and or solids is achieved by dissolving gas in the water or wastewater under pressure and then releasing the gas at atmospheric pressure in a flotation tank. The released gas forms tiny bubbles which adhere to the ...

Dissolved Air Flotation (DAF) Systems for Wastewater

Dissolved Air Flotation (DAF) is a physical chemical separation technique used to remove suspended solids and fats, oils and grease from the wastewater. Using a Dissolved Air Flotation system for wastewater treatment is a common technique across a range of markets; including the food and beverage, plastics recycling and pulp and paper industries, to name a few. Aerofloat has patented Dissolved ...Dissolved Air Flotation (DAF) is a physical chemical separation technique used to remove suspended solids and fats, oils and grease from the wastewater. Using a Dissolved Air Flotation system for wastewater treatment is a common technique across a range of markets; including the food and beverage, plastics recycling and pulp and paper industries, to name a few. Aerofloat has patented Dissolved ...

Design and Sizing of a Dissolved Air Flotation Separator

If using the smallest possible plate spacing were the answer to building the most efficient DAF, we would be building dissolved air flotation systems with 1/8" plate spacing, or smaller. Unfortunately, this is not the answer. Other considerations come into play. In actual practice, a plate spacing of 2" is the smallest plate spacing recommended. Many other issues come into play, such as ...If using the smallest possible plate spacing were the answer to building the most efficient DAF, we would be building dissolved air flotation systems with 1/8" plate spacing, or smaller. Unfortunately, this is not the answer. Other considerations come into play. In actual practice, a plate spacing of 2" is the smallest plate spacing recommended. Many other issues come into play, such as ...

Dissolved Air Flotation “DAF” - WATEQ CANADA

removed by a skimming device. Dissolved air flotation is very widely used in treating the industrial wastewater effluents from oil refineries, petrochemical and chemical plants, natural gas processing plants, paper mills, general water treatment and similar industrial facilities. The proposed equipment is manufactured under ISO 9001:2008removed by a skimming device. Dissolved air flotation is very widely used in treating the industrial wastewater effluents from oil refineries, petrochemical and chemical plants, natural gas processing plants, paper mills, general water treatment and similar industrial facilities. The proposed equipment is manufactured under ISO 9001:2008

DAF–dissolved air flotation: Potential applications in the ...

01/02/2007  DAF or dissolved air flotation, pressure flotation, or flotation with microbubbles (30–100 μm) is the most utilized process removing a number of pollutants, among others, colloids, fines and ultrafines particles, precipitates, ions, microorganisms, proteins, dispersed and emulsified oils in water (Rubio et al., 2002a, Rubio et al., 2002b, Ross et al., 2003, Carissimi and Rubio, 2005a, Matis ...01/02/2007  DAF or dissolved air flotation, pressure flotation, or flotation with microbubbles (30–100 μm) is the most utilized process removing a number of pollutants, among others, colloids, fines and ultrafines particles, precipitates, ions, microorganisms, proteins, dispersed and emulsified oils in water (Rubio et al., 2002a, Rubio et al., 2002b, Ross et al., 2003, Carissimi and Rubio, 2005a, Matis ...

Treatment of Oilfield Produced Water with Dissolved Air ...

Dissolved air flotation (DAF) was the primary treatment technology investigated in this study for removing oil and grease from synthetic produced water. By itself, DAF achieved less than 70% oil and grease (OG) removal, and was not able to achieve a clarified effluent OG concentration of 30 mg/L required for regulatory discharge limits. At an optimum condition of 20 mg/L ferric chloride (FeCl3 ...Dissolved air flotation (DAF) was the primary treatment technology investigated in this study for removing oil and grease from synthetic produced water. By itself, DAF achieved less than 70% oil and grease (OG) removal, and was not able to achieve a clarified effluent OG concentration of 30 mg/L required for regulatory discharge limits. At an optimum condition of 20 mg/L ferric chloride (FeCl3 ...

Dissolved Air Flotation (DAF) – AWC Water

DISSOLVED AIR FLOTATION WATER TREATMENT PLANTS. AWC Water Solutions offers packaged water treatment plants based on dissolved air flotation (DAF) technology. These plants excel in treating lake and reservoir water containing high levels of color, algae and turbidity, as well as cold waters and high levels of iron and manganese. Our DAF plants are custom-designed to meet our clients ...DISSOLVED AIR FLOTATION WATER TREATMENT PLANTS. AWC Water Solutions offers packaged water treatment plants based on dissolved air flotation (DAF) technology. These plants excel in treating lake and reservoir water containing high levels of color, algae and turbidity, as well as cold waters and high levels of iron and manganese. Our DAF plants are custom-designed to meet our clients ...

Dissolved Air Flotation (DAF) Systems for Wastewater

Dissolved Air Flotation (DAF) is a physical chemical separation technique used to remove suspended solids and fats, oils and grease from the wastewater. Using a Dissolved Air Flotation system for wastewater treatment is a common technique across a range of markets; including the food and beverage, plastics recycling and pulp and paper industries, to name a few. Aerofloat has patented Dissolved ...Dissolved Air Flotation (DAF) is a physical chemical separation technique used to remove suspended solids and fats, oils and grease from the wastewater. Using a Dissolved Air Flotation system for wastewater treatment is a common technique across a range of markets; including the food and beverage, plastics recycling and pulp and paper industries, to name a few. Aerofloat has patented Dissolved ...

A Case Study of DAF Pilot Plant for Application of Water ...

dissolved air flotation (DAF) facilities for drinking water applications. High rate DAF processes are now available at loading rates of 20 to 40 m. 3 /m. 2. ∙h. The objective of the present work is to develop commercialization technology on physical process for algae removal in water treatment plant. During the service period of 2016.05 to 20163 06, DAF pilot plants (500 ton/day) process has ...dissolved air flotation (DAF) facilities for drinking water applications. High rate DAF processes are now available at loading rates of 20 to 40 m. 3 /m. 2. ∙h. The objective of the present work is to develop commercialization technology on physical process for algae removal in water treatment plant. During the service period of 2016.05 to 20163 06, DAF pilot plants (500 ton/day) process has ...

DAF Equipment - Wastewater Equipment, Sludge Scraper

In the middle, the dissolving water and the flocculated raw water adhere to each other and rise slowly into the air flotation separation chamber, which ensures the space and time between the flocs and the micro bubbles, and the release rate of the dissolved air is 80-100%. Combined DAF Equipment Features. Compact structureIn the middle, the dissolving water and the flocculated raw water adhere to each other and rise slowly into the air flotation separation chamber, which ensures the space and time between the flocs and the micro bubbles, and the release rate of the dissolved air is 80-100%. Combined DAF Equipment Features. Compact structure

AquaDAF* Clarifier SUEZ Water Technologies Solutions

Dissolved Air Flotation (DAF) is an excellent solution for clarifying water with high levels of algae and other low-density solids that cannot be removed efficiently by sedimentation. The AquaDAF* clarifier combines conventional DAF principles with several enhanced components, including a unique effluent collection system.Dissolved Air Flotation (DAF) is an excellent solution for clarifying water with high levels of algae and other low-density solids that cannot be removed efficiently by sedimentation. The AquaDAF* clarifier combines conventional DAF principles with several enhanced components, including a unique effluent collection system.

Design and Sizing of a Dissolved Air Flotation Separator

If using the smallest possible plate spacing were the answer to building the most efficient DAF, we would be building dissolved air flotation systems with 1/8" plate spacing, or smaller. Unfortunately, this is not the answer. Other considerations come into play. In actual practice, a plate spacing of 2" is the smallest plate spacing recommended. Many other issues come into play, such as ...If using the smallest possible plate spacing were the answer to building the most efficient DAF, we would be building dissolved air flotation systems with 1/8" plate spacing, or smaller. Unfortunately, this is not the answer. Other considerations come into play. In actual practice, a plate spacing of 2" is the smallest plate spacing recommended. Many other issues come into play, such as ...

The Use of Polymers in the Flotation Treatment of Wastewater

17/06/2019  dissolved air flotation (DAF) a double system of a cationic followed by an anionic polymer (Vaughan et al. 2000) [21]. The sludge produced by the single cationic polymer system was 2 3 times the volume of the dual one, and the chemicals and sludge disposal cost was almost twice as high.17/06/2019  dissolved air flotation (DAF) a double system of a cationic followed by an anionic polymer (Vaughan et al. 2000) [21]. The sludge produced by the single cationic polymer system was 2 3 times the volume of the dual one, and the chemicals and sludge disposal cost was almost twice as high.