Dear Mr. Shayan Khakmardan,

You can refer to some definitions for fouling types as follows:

(1) organic fouling caused by macromolecular organic compounds such as polysaccharides, protein, and humic acid;

(2) inorganic fouling involving the scaling with the crystallization of sparingly soluble mineral salts;

(3) colloidal fouling with the deposition of particles;

(4) biofouling from bacteria attachment

Amongst the various types of fouling, biofouling is considered the biggest challenge. Biofouling is mainly composed of bacteria and extracellular polymeric substances (EPS). In practice, organic fouling and biofouling usually occur together because the organic contents provide the food necessary for biological growth.

Hope you find helpful information.

Cheers,

Thanh Tin Nguyen

living creatures, such as human beings, or flora and fauna mostly possess organic chemistry in their body (organs), which most of their body is formed by hydrocarbons (H-C bonds) -that is why it is called organic chemistry. Proteins, carbohydrates, fats are categorized as organic chemistry. However, they are not alive by themselves and are not able to replicate themselves outside the living creature. When the fouling is in organo-fouling type, most of it is formed due to agglomeration of such chemicals. they are abundant in seawater since so many fish and Phyto/Zooplanktons dead bodies are present there.

While on the other hand, non-living things such as rock, metal, and so on are made up of inorganic chemicals including metal ions, salts, and so on.

There are also other type of contamination called bio-contamination, which germs are responsible for. The term "germs" refers to the microscopic bacteria, viruses, fungi, and protozoa that can cause disease or contamination. Their chemistry is also organic one, but the difference between their contamination and organic contamination is that most of them are alive outside their host's body. they are able to feed themselves with organic matters from other creatures and replicate themselves.

What stands out of above-mentioned explanation is that organo-fouling comes from hydro-carbonic debris of dead creatures. while bio fouling comes from germs, and colloidal fouling mostly comes from inorganic matters. And as Mr. Thanh Tin Nguyen said, " In practice, organic fouling and biofouling usually occur together because the organic contents provide the food necessary for biological growth". However, although they come together, they are different from each other.