On using microbial flocculant to water or sewage, waste water treatment process, if the water purification mechanism of microbial flocculant lack of correct understanding, are often can cause a lot of unnecessary loss, such as the use of microbial flocculant to deal with the sewage of the same charge, not only leads to the excessive waste of flocculant, also cannot obtain ideal processing effect; Again, such as ignoring the microbial flocculant optimal dosing quantity, cause the excessive dosing of flocculating agent or additive, often cannot obtain better processing effect.

    Limited to conditions and technical restrictions, so far, the flocculation mechanism of microbial flocculant is the lack of a relatively clear explanation. Nowadays people the effect mechanism of microbial flocculant, there are many kinds of hypotheses include: to principal stress raw rubber bacteria can be based on accumulation of poly hydroxybutyrate PHB aggregation theory; To extracellular filaments can aggregate to form the basis of the floc outer filaments of cellulose theory, in addition to regress - clay hypothesis proposed by terfield, Strantford adsorption bridging theory and put forward the hypothesis of virus and electrical neutralization theory, etc.