Study of the effect of the preparation “Polyaminol” on the species composition of activated sludge

Abstract

The chemical reagent «Polyaminol» has many advantages, one of which is low consumption (300 ml per 1 cubic meter of sediment is required), which means low costs and reduced storage capacity. This reagent has gained great popularity among water utilities for its use to quickly stabilize sediment, turn it into a soil substrate and eliminate unpleasant odors. In this article, for the first time, the composition of return, drainage waters from silt sites after treatment of sediment with a chemical reagent under the trade name «Polyaminol» was studied and changes in the species composition of the biocenosis of active sludge of nitridenitrifiers during its treatment with this reagent were studied. It is shown that drainage waters from silt maps have a high content of ammonium and phosphates, treatment of sediment with a reagent due to reverse flows at sewage treatment plants can lead to a decrease in the species composition of microorganisms of activated sludge. The assessment of changes in the indicators of the specific biocenosis of activated sludge during the use of the drug «Polyaminol» is given. A technical solution has been proposed to ensure the uniform flow of return waters into the pressure drainage and their mixing in the receiving chamber. This solution will ensure a reduction in the negative impact on the biocenosis active sludge. The results of the study are important in the practice of biological wastewater treatment.