Biogenic Flocculant Composition To Enhance Flocculation And Dewaterability Of Chemically Enhanced Primary Treatment Sludge

摘要

The present invention discloses a composite biogenic flocculant for enhancing flocculation and dewaterability of chemically enhanced primary treatment (CEPT) sludge. The present invention also discloses method of conditioning CEPT sludge using the composite biogenic flocculant.

主权项

1. A biogenic flocculant composition for CEPT sludge conditioning comprising at least one of
a) a first flocculant component which comprises at least one acidophilic auto-trophic iron-oxidizing bacterium and at least one species of acid tolerant organotrophic microbes which are grown in medium containing iron (II) salt as an energy substrate or an organic waste hydrolyzate as a growth medium; b) a second flocculant component which comprises a consortium of sulfur oxidizing bacterium in a mineral medium or in sludge filtrate with sulfur as an energy substrate, at concentrations of 0.1% to 1% (v/v); or c) a third flocculant component which comprises an organotrophic consortium comprising at least three different organotrophic microbes using sludge or food waste hydrolyzate as a cultivation medium.