Process for single system electrocoagulation, magnetic, cavitation and flocculation (EMC/F) treatment of water and wastewater

摘要

The current invention provides a novel process for the treatment and reclamation of drilling frac flowback and produced wastewater from the drilling industry. The wastewater is delivered to the EMC/F System from a frac tank or other reservoir. The wastewater is pumped into the system and is treated sequentially by passing through a mechanical hydrocavitation unit, an electromagnetic unit, an electrocoagulation unit and/or a hydrocyclone and a flocculation-sedimentation tank. Polishing of the final effluent is accomplished by passing the water through a mixed media tank.

主权项

1. A mobile or portable water treatment process for capturing and removing suspended and dissolved solids, carbon dioxide, hydrogen sulfide, volatile and non-volatile organic compounds, oxides and hydroxides of heavy metals, metal carbonates, petroleum products, or a mixture thereof from frac flowback or produced water, comprising:
a) pumping the frac flowback or produced water through a pair of filters having a plurality of inlets, the inlets being hydraulically connected to a source of the frac flowback or produced water, wherein the filters capture macroscopic debris for disposal giving a filtered flowback water; b) pumping the filtered flowback water from the pair of filters through an outlet having a connection to a pair of first flowlines with probes inserted into the flowlines to monitor temperature, pH, flow, and conductivity; c) pumping the filtered flowback water through the pair of first flowlines, wherein the pair of first flowlines is in hydraulic communication with a magnetic field produced by an around-the-pipe electromagnet, or by a pet anent magnet, to give a second flowback in water; d) pumping the second flowback water through a divided second flowline having two or more divided lines wherein each divided line is in hydraulic connection to one of two mechanical hydrocavitation devices to produce a treated second flowback water; e) pumping the treated second flowback water through a third flowline in fluid connection to a horizontal surge separation tank having a horizontal surge separation tank outlet to give a third flowback water; f) flowing the third flowback water from the horizontal surge separation tank outlet into a fourth flowline, wherein the fourth flowline has two or more divided lines and each divided line is in hydraulic communication with one of two electrocoagulation devices to give a fourth flowback water; g) pumping the fourth flowback water into a fifth flowline which is in fluid communication with a horizontal atmospheric separation tank to give a fifth flowback water; h) flowing the fifth flowback water from the horizontal atmospheric separation tank into a sixth flowline to give a sixth flowback water, wherein the sixth flowline is in fluid communication with one of two pumps; i) pumping the sixth flowback water via a seventh flowline to give a seventh flowback water, wherein the seventh flowline is in fluid communication with a hydrocyclone; j) discharging the seventh flowback water via an eighth flowline to a flocculation/sedimentation tank separating any remaining formed solids from the seventh flowback water, said eighth flowline equipped with probes to monitor pH, flow, and conductivity; and k) removing the seventh flowback water from the flocculation/sedimentation tank for recycle in well fracing operations.