Concentrating of wastewater to reduce flow rate, cost, and footprint of treatment system

摘要

A system to remove contaminants from contaminated water contains a pre-concentrating subsystem, a contaminant removal subsystem or a biological subsystem configured to remove two or more contaminants, and a permeate blending subsystem. A process for removing contaminants from contaminated water includes concentrating contaminated water, treating concentrated contaminated water, and combining product water to produce environmentally acceptable product water.

主权项

1. A system to remove contaminants from a contaminated water, the system comprising:
a pre-concentrating subsystem configured to receive a volume of the contaminated water and produce a concentrated contaminated water having between about 10% and about 50% of the volume of the contaminated water and a first product water having between about 50% and about 90% of the volume of the contaminated water, the contaminated water having a first concentration of contaminants, and the concentrated contaminated water having a second concentration of contaminants at least two times higher than the first concentration of contaminants; one of a contaminant removal subsystem configured to receive the concentrated contaminated water and a biological subsystem configured to receive the concentrated contaminated water,
wherein the contaminant removal subsystem comprises zero valent iron media disposed in a reactor, and is configured to remove contaminants selected from the group consisting of selenium-containing compounds, nitrate-containing compounds, arsenic-containing compounds, and mercury-containing compounds from the concentrated contaminated water, and configured to produce a second product water,wherein the biological subsystem is configured to remove contaminants selected from the group consisting of selenium-containing compounds, nitrate-containing compounds, arsenic-containing compounds, and mercury-containing compounds from the concentrated contaminated water, and configured to produce second product water, andthe second product water having a third concentration of contaminants at least about 90% lower than the first concentration in the contaminated water and at least about 95% lower than the second concentration in the concentrated contaminated water; and a permeate blending subsystem configured to receive the first product water from the pre-concentrating subsystem and all of the second product water from one of the contaminant removal subsystem and the biological subsystem to produce a blended product water having a fourth concentration of contaminants at least about 90% lower than the first concentration in the contaminated water, by blending the first product water and the second product water.