APPARATUS AND METHODS FOR REMOVING CONTAMINANTS FROM WASTEWATER

摘要

Apparatus and methods are provided for removing solids from wastewater. The apparatus may include a dissolved solids removal system including a first membrane stack for removing a first portion of dissolved solids from wastewater, the first membrane stack having a first rejection rate and including at least one first membrane having a first operating pressure rating. A first solution unit may be included downstream of the at least one first membrane, the first solution unit being configured to maintain a differential pressure over the at least one first membrane below the first operating pressure rating. The dissolved solids removal system may also include a final membrane stack for removing a final portion of dissolved solids from the wastewater, the final membrane stack being located downstream of the first membrane stack and having a final rejection rate higher than the first rejection rate.

主权项

1. An apparatus for removing solids from wastewater, comprising:
a wastewater input for providing wastewater having a first concentration of total dissolved solids; and a dissolved solids removal system, which comprises:
a first membrane stack for removing a first portion of dissolved solids from the wastewater, the first membrane stack having a first rejection rate and comprising at least one first membrane having a first operating pressure rating;a first solution unit downstream of the at least one first membrane, the first solution unit being configured to maintain a differential pressure over the at least one first membrane below the first operating pressure rating; anda final membrane stack for removing a final portion of dissolved solids from the wastewater, the final membrane stack being located downstream of the first membrane stack and having a final rejection rate higher than the first rejection rate.