System and method for wastewater treatment

Abstract

The present disclosure is directed towards systems and methods for the treatment of wastewater. A system in accordance with one particular embodiment may include at least one resin tank including an ion exchange resin configured to target a particular metal. The at least one resin tank may be configured to receive an output from an oxidation reactor configured to receive a flow of wastewater from a wastewater producing process. The system may further include a vacuum filter band system configured to receive a saturated resin tank and to apply a water rinse to the resin to generate a resin slurry, the vacuum filter band system including a vacuum filter band configured to receive the resin slurry. Numerous other embodiments are also within the scope of the present disclosure.

Description

RELATED APPLICATIONS[0001]This application claims the priority of the following application, which is herein incorporated by reference: U.S. Provisional Application No. 61 / 119,567; filed 3 Dec. 2008, entitled: “Ion Exchange Based Metal Bearing Wastewater Treatment and Recycling System Therefore”.TECHNICAL FIELD[0002]This disclosure generally relates to the field of industrial wastewater treatment of metal bearing wastes. More specifically, the present disclosure relates to the equipment, operating procedures, chemical processes, and physical processes employed to remove regulated and non regulated contaminants from industrial wastewater.BACKGROUND[0003]Many industrial manufacturing processes generate wastewater containing metals and other contaminants; both organic and non-organic. Due to their inherent toxicity, regulatory authorities place strict limits on the maximum concentration of certain metals that can be legally discharged into the environment. In order to comply with these...

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Benefits of technology

[0015]One or more of the following features may be included. The method may include providing a resin rinse to the resin slurry via at least one spray nozzle. The method may also include providing a cascading resin rinse to the resin slurry via a plurality of spray nozzles associated with the at least one spray nozzle. The method may further include applying a negative pressure via the vacuum filter band to at least partially dewater the resin slurry. The cascading resin rinse may include at least one of HCL, NaOH, H2O, oxidants, and reducing agents.

[0016]In some embodiments, the method may also include pumping, via a resin slurry pump, the resin slurry from a holding vessel to the vacuum filter band. The m

Problems solved by technology

Due to their inherent toxicity, regulatory authorities place strict limits on the maximum concentration of certain metals that can be legally discharged into the environment.

However, the need to handle, transport, and dispose of the resulting hazardous sludges is one of the most costly, labor intensive, resource demanding and difficult problems with chemical precipitation as a wastewater treatment.

The inherent disadvantage of chemical precipitation is that it is an active and additive process and, as such, requires that chemicals be added to the wastewater in order to remove regulated metals.

The side effect of this is an increase in the concentrations of many other substances, as well as a deterioration in characteristics such as chemical oxygen demand (COD) and conductivity; thus requiring additional treatments and rendering the water unsuitable or uneconomical for recycling and reuse.

Furthermore, the metals removed are not only unrecoverable, they are rendered into a regulated hazardous material requiring specialized disposal.

Underdosing of chemicals results in incomplete precipitation and removal of regulated metals, wh

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