TW EASTERN CHEM SINGAPORE PTE.LTD
Comparison of Polyacrylamide and Bioflocculant
Polyacrylamide is a linear water-soluble
organic polymer, insoluble in most organic solvents. It can be divided into
anionic, cationic, non-ionic and amphoteric polyacrylamide according to the
groups on the ionic and molecular chains. The product has good flocculation. It
is widely used in sewage treatment and has considerable viscosity. It can play
a thickening role in many industries. The product is white particles or powder,
non-toxic and tasteless. It has been applied in papermaking, printing and
dyeing, metallurgy, mining, coal washing, petrochemical industry, biomedicine,
geological exploration and other industries.
Bioflocculant
is a new product which has been studied only in recent years. It is a kind of
microbial fermented polysaccharides with a variety of biologically active
groups. The molecular weight is generally between 100 and 3 million. The
appearance are usually white or light yellow solids, with a large number of
hydroxyl groups and some carboxyl groups on the microscopic surface. The colloidal particles formed hydrogen bonds, adsorption
bridging and large flocs, and then accelerated the settling of suspended
solids. This product is
widely used in chemical industry, paper making, printing and dyeing, pharmacy,
aquaculture, textile and other industries. It is an efficient flocculant
without secondary pollution.
Comparison
of Polyacrylamide and Bioflocculant:
1. Both of them are macromolecule flocculants.
The molecular weight of polyacrylamide is generally between 6 million and 24
million. Its molecular weight is relatively high. The molecular weight of
bioflocculant is between 1 million and 3 million, and its molecular weight is
relatively low;
2. There are more kinds of polyacrylamide
products than bioflocculants;
3. Polyacrylamide is more widely used than
bioflocculant;
4. Polyacrylamide will remain in production,
and the residual acrylamide has certain toxicity. Bioflocculant is a new type
of water treatment agent which is non-toxic, harmless, non-secondary pollution
and degradable. It has broad prospects, especially in industries with strict
requirements for residues, such as food, medicine, drinking water, cosmetics
and sugar purification;
5. Both of them have their own advantages. In
some areas, the combination of the two is more effective.