Membrane bioreactor wastewater treatment using calcium carbonate

Abstract

The present invention relates to a process for the treatment of wastewater in the membrane bioreactor (MBR) process using at least one membrane module, characterized by the steps of a) providing wastewater, b) contacting the wastewater of step a) with the at least one membrane module in the presence of sludge, c) adding calcium carbonate to the wastewater of step a) before and/or during step b); the use of calcium carbonate in such a process, a method for increasing the membrane permeability in a membrane bioreactor (MBR) process using at least one membrane module by adding calcium carbonate, as well as a method for increasing the membrane flux rate in a membrane bioreactor (MBR) process using at least one membrane module by adding calcium carbonate.

Dependencies are inferred from the claim text.