US 12,637,374 B2 · Method and system for wastewater treatment by membrane filtration and electrochemical oxidation

Abstract

A system for wastewater treatment comprises a membrane filtration device which receives the stream of pre-treated wastewater from the pre-treatment unit and generates a reject stream which is supplied to an electrochemical oxidation reactor which generates a reactor effluent stream which is divided into a recirculated wastewater stream that is recycled back to the equalization tank and a reactor discharge stream that is discarded from the system. The target fraction ratio between the volume of the recirculated wastewater stream and the volume of the reactor discharge stream is controlled based on the target total dissolved solids amount in the wastewater to be treated, on the amount of regulated organic substances in the wastewater which are treated by the electrochemical oxidation reactor to increase the efficiency of the electrochemical oxidation reactor to a target value and on the composition of the wastewater being discharged from the system.

Claims16

Dependent claims

A wastewater treatment system comprising:

a. first membrane filtration device configured to receive a stream of wastewater to be treated, wherein the stream of wastewater to be treated contains organic and inorganic compounds and the first membrane filtration device is capable of generating a first reject stream and a first treated wastewater stream which is discarded from the system;
and
b. an electrochemical oxidation reactor configured to receive the first reject stream from the first membrane filtration device, wherein the electrochemical oxidation reactor is configured to remove a portion of the selected organic compounds from the first reject stream and thereby generate a reactor effluent stream,
wherein the reactor effluent stream is divided into a recirculated wastewater stream which is directed back to the first membrane filtration device and a reactor discharge stream which is discarded from the system.

1 more element

A method for wastewater treatment by membrane filtration and electrochemical oxidation comprising the steps of:

a. supplying a stream of wastewater to be treated to a membrane filtration device, discharging a reject stream from the membrane filtration device, and discarding a stream of wastewater which was treated in the membrane filtration device out of the system;
b. supplying the reject stream from the membrane filtration device to an electrochemical oxidation reactor which treats the reject stream to remove only a portion of specific organics therefrom and generating a reactor effluent stream which is discharged from the electrochemical oxidation reactor;
c. supplying a portion of the reactor effluent stream back to the membrane filtration device as a recirculated wastewater stream and discarding the rest of the reactor effluent stream as a reactor discharge stream out of the system or merging it with the stream of wastewater treated in the membrane filtration device to be discarded out of the system;
and
d. controlling the ratio between volume of the recirculated wastewater stream from the electrochemical oxidation reactor to membrane filtration device and the volume of the reactor discharge stream.

2 more elements

Dependencies are inferred from the claim text.

Method and system for wastewater treatment by membrane filtration and electrochemical oxidation

Life of this patent

Method and system for wastewater treatment by membrane filtration and electrochemical oxidation

Life of this patent

Abstract

Claims16