Wastewater Treatment Membrane Electro Membrane

Abstract

In an apparatus for treating wastewater, water is screened, biologically treated and coagulated with the addition of chemicals before it is drawn through a membrane filter to produce permeate that is then passed through an electro-chemical cell to coagulate and/or oxidize residual contaminants such as phosphorous, nitrogen, or ammonia, and is then passed through a secondary membrane filter to capture and remove any remaining contaminants.

Claims

1. A process for removing contaminants from wastewater comprising of: (a) flowing wastewater into a Membrane Bio-Reactor (MBR) with permeate extracted, (b) MBR permeate flowing into an electro-chemical cell where coagulation and/or oxidation may occur producing an effluent, (c) Electro-chemical cell effluent flowing into a secondary membrane for tertiary treatment with a final permeate/effluent discharged to the environment and suitable for an application of reuse.

2. The system of claim 1 wherein the MBR coagulates contaminants using a chemical additive and provides pre-treatment for the electro-chemical cell effectively increasing the efficiency of the electro-chemical treatment process by reducing the capital and operational costs to treat specified contaminants.

3. The system of claim 1 wherein concentrated oxygen (50% and higher) or ozone may be added to the MBR permeate to enhance residual contaminant removal effectively increasing the efficiency of the electro-chemical treatment process by reducing the capital and operational costs to treat specified contaminants.

4. The system of claim 1 wherein the electro-chemical cell is comprised of an anode-cathode pair and is in contact with permeate generated by the MBR.

5. The system of claim 1 wherein the secondary membrane is in contact with effluent generated by the electro-chemical cell and produces a permeate/effluent with contaminant concentrations between 0.05 mg/L and 0.00 mg/L.

6. The system of claim 1 wherein contaminants may include but are not limited to ammonia, nitrogen, phosphorous, total suspended solids (TSS), heavy metals, emulsified oils (FOG), bacteria, viruses, biological oxygen demand (BOD), chemical oxygen demand (COD), polyfluoroalkyl substances (PFAS) and pharmaceuticals.

7. The system of claim 1 wherein the final permeate/effluent discharged is suitable for use as a potable water source.

Description

DRAWING DESCRIPTION

[0013] FIG. 1 shows a general arrangement of the treatment process claimed.

DETAILED DESCRIPTION OF THE INVENTION

[0014] A reduction of residual contaminants found in permeate produced by a Membrane Bio-Reactor (MBR) can be achieved by further treatment of the MBR permeate in an electro-chemical cell where coagulation and/or oxidization may occur depending on the targeted contaminants. Optionally, concentrated oxygen (50% and higher) or ozone is added to the MBR permeate to enhance residual contaminant removal by the electro-chemical cell. Effluent from the electro-chemical cell is then passed through a secondary membrane functioning as a tertiary filter to capture and remove any remaining residual contaminants.

SEQUENCE LISTING

[0015] Not Applicable