Yielding excellent results for our customers

The Brennfloc coagulants and flocculants product line for liquid solids separation yields excellent technical and economical results for our customers. Brennfloc products are effective in a variety of applications, including: water clarification, solids settling, oil in water emulsion breaking, metals precipitation, filtration, and sludge processing.

In this article you will learn:

Variety of Applications for Coagulants and Flocculants

Brennfloc organic and inorganic coagulants neutralize the anionic charges that surround suspended colloidal particles. These anionic charges cause these fine colloidal particles to repel each other preventing coagulation. By neutralizing charges, these fine particles can collide increasing their size and creating a “pin floc”. Charge neutralization is the first step in water clarification.

In addition, Brennfloc inorganic coagulants neutralize the anionic charges surrounding colloidal suspended particles and produce a metal precipitant. This metal precipitant can aid with settling and clarification.

Brennfloc flocculants improve clarification by gathering the fine coagulated particles (or pin floc), increasing floc size, and increasing these particles’ settling or rise rates. Flocculation is the second step in clarification and can greatly improve the plant operation by speeding up separation and clarity. Terms such as "floc building" or "floc bridging" describe the flocculation step.

Like fine suspended colloidal particles in water, oil can also be suspended, which is known as an oil in water emulsion. Much like the fine particles having negative charges which cause repulsion, these fine oil particles also tend to display the same tendencies. Oil in water emulsions can have surfactants and fine particles which will stabilize the emulsion and hinder separation. Brennfloc coagulants are effective in treating oil in water emulsions by charge neutralization and breaking surfactant bonds.

Water can become contaminated with many dissolved materials such as lead, zinc, copper to name a few. Brennfloc metals precipitants effectively and safely precipitate these contaminates allowing for removal by traditional clarification methods.

Filtration can be used alone to remove particles or as a final polishing step in clarification. Using Brennfloc products enhances filtration efficiency by increasing floc size, improving capture, and extending filter run times.

When solids are removed from water, a sludge is produced. This sludge can contain large amounts of water which can affect disposal, reuse, or reclamation. Brennfloc flocculants improve sludge thickening and sludge dewatering.

Markets and Applications using Water Treatment products

Brennfloc products can be used in numerous industrial and municipal water and wastewater markets for various applications.

Water rushing through pipes


Water treatment plant


  • Drinking water
  • Filtration
  • Flotation
  • Industrial clarifiers
  • Metals precipitation
  • Municipal and industrial sludge dewatering
  • Oil in water emulsion breaking
  • Particle solids settling
  • Raw water clarification
ApplicationEPI PolyamineDADMACNatural Based
Central Waste DisposalXXX
Food WastewaterXXX
General CoagulationXXX
LaundriesX X
Metals ProcessingXXX
Mining XX
Oil and GasXXX
Oil in WaterX X
Potable Water X 
Overview of water treatment plants


Organic coagulants neutralize the negative charge in water allowing particles to come together and grow larger.

There are 3 different types of organic coagulants:

  • EPI Polyamine: refers to epichlorohydrin/alkylamine compounds
  • DADMAC: refers to diallyldimethyl ammoniumchloride compounds
  • Natural-Based: natural based organic coagulants are created from
    plants and other natural ingredients

Brennfloc organic coagulants treat a wide range of applications, giving the flexibility to design a cost effective, tailor-made program for your needs and discharge requirements.

Products are available in wide range of various chemistries, molecular weights, charges and activities, which allows you to zero in on the right product for the application.

Foaming water treatment processing

Inorganic Coagulants

Inorganic coagulants neutralize the negative charges in water but also precipitate to create a metal hydroxide. Brennfloc inorganic coagulants of aluminum and iron salts cover a wide range of applications. Inorganic coagulants are effective as coagulants for suspended particles.

Aluminum salts:

  • Aluminum Chlorohydrate (ACH)
  • Aluminum Sulfate (Alum)
  • Poly-Aluminum Chloride (PAC)
  • Sodium Aluminate

Iron salts:

  • Ferric Chloride
  • Ferric Sulfate
  • Ferrous Chloride
  • Ferrous Sulfate

Organic and Inorganic Coagulants Blends

Blending organic and inorganic coagulants can produce an effective solution compared to using either type of coagulant on its own. When jar testing indicates a dual treatment program, Brennfloc coagulant blends combine the treatment benefits of organic and inorganic coagulants, which yields superior performance.

Our Brennfloc coagulant blends are available in a wide range of chemistries and ratios using various combinations of organic and inorganic coagulants.

Water washing fresh produce

Metals Precipitants

As wastewater metals discharge limits become increasingly strict, there is a growing need for effective but also safe environmentally friendly precipitants.

  • Hydroxide Precipitation: although effective, cannot meet the new lower
    metals discharge limits required by many industries
  • Sulfide Precipitation: also effective but can have toxicity issues

The Brennfloc metals precipitants are effective in meeting these low discharge requirements, safe to use, and environmentally friendly.

Brennfloc metals precipitants are effective in treating: antimony, beryllium, cadmium, copper, lead, nickel, silver, tin, trivalent chrome, and zinc.

Read our guide to removing heavy metals from water


Brenntag Water Treatment offers an extensive range of anionic, nonionic, and cationic flocculants.

  • Anionic Flocculants: negative charge
  • Nonionic Flocculants: neutral charge
  • Cationic Flocculants: positive charge

Emulsions and dry flocculants are available ranging from very high to low molecular weights,and are also available in linear or structured (branched).

Branched or structured polymers deliver exceptional performance when used on centrifuge dewatering applications. The violent actions within a centrifuge expose substantially more charge sites which in turn produces a dryer more stable sludge cak

 Molecular Weight
ChargeMediumHighVery High
10X X
15  X
20X X
25 X 
40X X
60 X 
70 X 
90 X 
95 X 
 Molecular Weight
ChargeLowMediumHighVery High
1 XX 
2  X 
3  X 
4  XX
5  XX
7   X
10 XXX
13  XX
15  X 
24  X 
25  XX
33 XXX
40 XXX
50  XX
95  X 
100  X 
 Molecular Weight
ChargeLowMediumHighVery High
1  X 
2.5  X 
5  X 
10 XXX
15 XXX
20 XXX
55  XX
70 XX 
90 XX 
 Molecular Weight
ChargeVery LowLowMediumHighVery High
0.1  X  
1.5  X  
2    X
2.5  XX 
5  XX 
15  XXX
25 XXX 
30  XX 
35  XXX
40  XXX
50  XXX
60 X X 
70 XXX 
80 XX  
100 XX  
 Degree of Structure or Branching
ChargeVery LowLowMedium LowMediumMedium HighHighVery High
30 X    X
45    X  
50      X
 Degree of Structure or Branching
55  X
80 X 


The Brennfloc coagulants and flocculants product line for liquid solids separation yields excellent technical and economical results for our customers.
Download a full copy of our "Liquid Solids Separation" brochure.