metal precipitation

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Wastewater Treatment Chemicals Additional free information on any of these items can be obtained by circling the appropri- ate number on the reader service. CLAY-BASED TECHNOLOGY Wyo-Ben, Billings, Mont. Clear-treat products offer the best alternative for treatment of industrial wastewater from plating, coating, painting, and other operations. This ben- tonite clay-based technology cleans wastewater streams and ties up heavy metals. Clear water can generally be sewered or reused in the process and the sludge usually deposited in municipal landfills. Both off-the-shelf and blends cus- tomized to the specific needs of customers are available. Circle 151 on reader information card MECAL PRECIPITATION Degussa Corp., Parsippany, N.J. TMT-15, a 15% aqueous solution of trimercap- to-s-triazine, precipitates heavy metal ions, form- ing coarse, easily dewatered, nonleachable floes. It works in acidic, neutral, and alkaline media and is an environmentally safe product, exhibit- ing very low toxicity towards aquatic organisms, bacteria, and humans. It will not release toxic gases, such as hydrogen sulfide, or flammable, toxic products, such as carbon disulfide, even at pH values less than 1. In addition sludge volume production is frequently reduced. Circle 153 on reader information card PAINT DETACKIFIER Chemetall Oakite, Berkeley Heights, N.J Gardofloc 2000 is a paint detackifier that aids in the removal of paint overspray in water-wash paint spray booths so it won’t stick to the pump, exhaust fans, booth, or other equipment. The polymeric, liquid additive reacts with paint over- spray collected in water-wash booths, producing a dry, nontacky sludge that can be easily removed manually, with cyclonic extractors or other con- ventional sludge-removal equipment. The prod- uct helps end-users reduce costs associated with excess manual labor to clean out paint buildup, routine booth maintenance, and excessive down- time due to related problems. Compared to previ- ous technologies, Gardofloc 2000 is used at lower concentrations and is much more effective. The solution’s specially formulated chemistry also reacts to and detackifies a wide variety of paints including water-base and high-solids. Circle 152 on reader information card ONE-STEP FLOCCULENT Colloid Environmental Technologies, Arlington Heights, Ill. The RM-10 series of clay-based dry flocculents can remove emulsified oils, soluble metals, and suspended solids from a variety of wastewaters. These materials are bentonite-based reactive separating agents composed of minerals, pH adjustment compounds, and polymers. They can be used to treat wastewaters from paint, vibra- tory deburring, parts washing, and other metal- finishing processes. In addition to the most comprehensive line of formulated clay-based products, CETCO also offers a complete line of liquid coagulants, coagulant aids, and blends. Circle 154 on reader infomation card July 2002 23

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Page 1: Metal precipitation

Wastewater Treatment Chemicals Additional free information on any of these items can be obtained by circling the appropri- ate number on the reader service.

CLAY-BASED TECHNOLOGY

Wyo-Ben, Billings, Mont. Clear-treat products offer the best alternative for treatment of industrial wastewater from plating, coating, painting, and other operations. This ben- tonite clay-based technology cleans wastewater streams and ties up heavy metals. Clear water can generally be sewered or reused in the process and the sludge usually deposited in municipal landfills. Both off-the-shelf and blends cus- tomized to the specific needs of customers are available.

Circle 151 on reader information card

MECAL PRECIPITATION

Degussa Corp., Parsippany, N.J. TMT-15, a 15% aqueous solution of trimercap-

to-s-triazine, precipitates heavy metal ions, form- ing coarse, easily dewatered, nonleachable floes. It works in acidic, neutral, and alkaline media and is an environmentally safe product, exhibit- ing very low toxicity towards aquatic organisms, bacteria, and humans. It will not release toxic gases, such as hydrogen sulfide, or flammable, toxic products, such as carbon disulfide, even at pH values less than 1. In addition sludge volume production is frequently reduced.

Circle 153 on reader information card

PAINT DETACKIFIER

Chemetall Oakite, Berkeley Heights, N.J Gardofloc 2000 is a paint detackifier that aids in the removal of paint overspray in water-wash paint spray booths so it won’t stick to the pump, exhaust fans, booth, or other equipment. The polymeric, liquid additive reacts with paint over- spray collected in water-wash booths, producing a dry, nontacky sludge that can be easily removed manually, with cyclonic extractors or other con- ventional sludge-removal equipment. The prod- uct helps end-users reduce costs associated with excess manual labor to clean out paint buildup, routine booth maintenance, and excessive down- time due to related problems. Compared to previ- ous technologies, Gardofloc 2000 is used at lower concentrations and is much more effective. The solution’s specially formulated chemistry also reacts to and detackifies a wide variety of paints including water-base and high-solids.

Circle 152 on reader information card

ONE-STEP FLOCCULENT

Colloid Environmental Technologies, Arlington Heights, Ill. The RM-10 series of clay-based dry flocculents can remove emulsified oils, soluble metals, and suspended solids from a variety of wastewaters. These materials are bentonite-based reactive separating agents composed of minerals, pH adjustment compounds, and polymers. They can be used to treat wastewaters from paint, vibra- tory deburring, parts washing, and other metal- finishing processes. In addition to the most comprehensive line of formulated clay-based products, CETCO also offers a complete line of liquid coagulants, coagulant aids, and blends.

Circle 154 on reader infomation card

July 2002 23