Abstract: The present invention is directed to a composition and method to decrease the amount of particulate material in suspension, both in a liquid or in air, especially in industrial processes that generate suspended particulate material. In particular, the invention is directed to a composition and method to decrease the amount of particulate material in suspension in air or a liquid through agglomeration and subsequent biocementation, by application of an exopolysaccharide (EPS) source that can be direct or through inoculation with microorganisms that produce said EPS. This allows in a first step to settle the particulate material and subsequently the cementation of the material when there are calcium containing compounds in the particulate material that has been settled in the first step, by means of the inoculation of a second class of microorganisms that have ureolytic activity.

Abstract: The invention is directed to decreasing the amount of particulate material suspended in air or water, in any situation in which it is desired to decrease the amount of particulate material in suspension, and especially in industrial processes that generate particulate material suspended in air or water. In particular, the invention is directed to decreasing the particulate material in suspension by means of agglomeration with negatively charged ExoPolySaccharides (EPS). To decrease the amount of particulate material suspended in air, this can be sprayed with a negatively charged EPS solution according to the invention, or the EPS can be immobilized on a filter which the air with particulate material passes through. To decrease the amount of particulate material in water, a suspension with a negatively charged EPS solution according to the invention is added to said water, which agglomerates and settles the particulate material by means of the charge attraction principle.