Screening of inert solids from a low-yield wastewater treatment process

摘要

Disclosed is a wastewater treatment method comprising: combining wastewater comprising readily degradable solids and inert solids with bacteria-laden sludge in a mainstream reactor to form a mixed liquor; separating the mixed liquor into a clarified effluent and an activated sludge; returning a first portion of activated sludge to the mainstream reactor; and treating a second portion of activated sludge in a sidestream bioreactor prior to returning the second portion of activated sludge to the mainstream reactor; wherein at least a portion of the material returned to the mainstream reactor is passed through a screening device to remove at least a portion of the inert solids.