4/8/2014 Hazardous Waste Treatment

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Central hazardous wastetreatment and recycling facility inMinnesota

Hazardous Waste Treatment

In the past, hazardous waste management meant removing pollutants and disposing ofresiduals in a landfill. As industry and business have become more environmentallyconscientious, and in order to comply with federal, state and local regulations, the need foralternatives to these historic methods has increased, and so has our ability to offer alternatesolutions.

Hazardous w astes are generated as the result of treatment steps

performed on industrial w astew aters prior to discharge, or contaminant-

containing groundw aters. In these cases, the treatment process (for

example, by precipitation, evaporation, f iltration, or ion exchange

technology), produces a residual w aste, including sludge and spent media,

w hich must be analyzed, using the Toxic Characteristics Leaching

Procedure (TCLP) test. The results of the TCLP are used to determine

w hether a w aste is hazardous or non-hazardous.

RCRA is the Resource Conservation and Recovery Act, a set of regulations

adopted by Congress and administered by US Environmental Protection

Agency (EPA), State and local regulatory agencies. RCRA defines w hat

hazardous w astes are and how they must be legally stored, treated and

disposed of. Many US states have been given authority by the EPA to enforce RCRA rules and also establish additional

local and regional rules if necessary, how ever, State law s can never reduce the standards enacted by the EPA. There are

signif icant legal liabilities to companies for not properly managing w aste residuals according to RCRA regulations.

Waste may be classif ied as either Listed or Characteristic hazardous w aste. RCRA regulations provide guidance to assist

the w aste generator in determining w hether the w aste falls into either classif ication.

With few exceptions, the EPA has classif ied the residuals from the follow ing six manufacturing processes, also called

Electroplating Processes, as Listed Hazardous Wastes w hich must be dealt w ith as such. The residuals from these

processes are assigned the F006 hazardous w aste code.

Electroplating

Coating (chromating, phosphating, coloring)

Electroless Plating

Chemical Etching and Milling

Anodizing

Printed Circuit Board Manufacturing

Other metal f inishing processes performed in conjunction w ith the above 6 Listed electroplating processes are also

considered F006 Listed Hazardous Wastes.

If any part of the resulting w astew ater or w aste residual w hich contains the follow ing metals, then the w aste is a

Characteristic Hazardous Waste:

Arsenic - 5 ppm

Chromium - 5 ppm

Mercury - 0.2 ppm

Barium - 100 ppm

Cyanides - 250 ppm

Selenium - 1 ppm

Cadmium - 1 ppm

Lead - 5 ppm

Silver - 5 ppm

Hazardous w aste treatment involves almost anything that can be done to a hazardous w aste prior to disposal. Any

method, technique or, process designed to change the physical, chemical, or biological character or composition of

the hazardous w aste, so as to neutralize the w aste or to make the w aste less hazardous and thereby safer for transport,

increase potential for recovery, reuse or storage, or to reduce w aste volume.

Waste dew atering is a eff icient and effective treatment method used for w aste volume reduction. A variety of treatment

systems are employed to dew ater w aste - including belt presses, centrifuges, and other devices. Siemens offers a

complete range of dew atering systems in a range of sizes and suitable for all forms of reuse applications - including land

application, composting, and incineration.

Evoqua Water Technologies ow ns and operates tw o, fully-permitted facilities w ith federal RCRA Part B and CERCLA

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Hazardous Waste Treatment

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Microfiltration System Reduces Heavy Metal Waste by

Two-Thirds

Marathon Norco Aerospace located in Waco, Texas is one of

the few manufacturers of rechargeable, nickel cadmium

batteries for the aerospace industry. One of the production

problems associated w ith the manufacture of rechargeable,

nickel cadmium batteries is the use of a number of heavy

metals. Tw o of the metals w hich can be problematic w hen it

comes to w aste disposal are cadmium and chromium.

The amount of heavy metal w aste generated at the Waco

facility categorized the plant as a "signif icant hazardous

w aste generator," w hich created costly off-site hazardous

w aste disposal and extensive record keeping and

documentation. Since 1972, the plant has used a

diatomaceous f ilter system to reduce the volume and

concentrate heavy metals in the w aste. The plant's

hazardous w aste production required transport from the plant

of over 100,000 pounds per year.

Read Full Case Study

authority and specializing in the treatment of inorganic w astes and w astew ater. Wastes are sent to the facilities in drums

(of all sizes), portable totes, cubic yard bags or boxes and tanker trucks. Virtually everything that w e take into our facilities

is in some w ay recycled. Recycling reduces liability, w hich is a signif icant incentive to many of our customers.

The heart of our hazardous w aste treatment operations are in facilities located in Roseville, Minnesota and Los Angeles,

California. These facilities serve as regional hubs for the treatment of hazardous w aste and w astew ater and the recovery

of reusable by-products collected from the company’s hazardous w aste customers. Evoqua Water Technologies is the

only company w hose facilities handle and regenerate ion exchange resins and other media.

Our goal is to produce zero hazardous w aste by extracting all reusable material, to eliminate pollutants from the

environment and avoid disposal costs and liability. Most of the treatment residual w astes (F006, etc.) shipped to our

facilities are inorganic or trace organicmaterials. Our advanced processing techniques have allow ed us to increase

beneficial reuse rate of these w astes to over 90% as reusable chemicals and metallic commodities.

Treatment Technologies for Hazardous Waste:

Sludge Dew atering

Waste Reduction & Recycle

Hazardous Waste Treatment Case Study