Wastewater is essential to both industrial and municipal operations. A growing population and a scarcity of water in some regions have made it necessary for industrial operations and municipalities to look for more ways to economically produce quality drinking water and to ensure efficient Water Management.
CED’s clarification products enhance plant production in primary, secondary and tertiary treatment. These positively charged chemicals form flocs in wastewater at a pH range of 4 to 9 collect the negatively charged suspended particles. Proper clarification leads to the formation of larger, stronger, heavier flows, resulting in quicker settling rates and a denser sludge blanket. Our clarification products enhance primary treatment, remove suspended solids, reduce BOD and contaminants.
When it comes to fresh water and wastewater clarification, products that utilize a single type of coagulant chemistry typically do not provide exceptional results. Unlike single-component products, our coagulants comprise a family of products that typically utilize two or more chemistries to significantly improve the clarification of fresh water and wastewater over a broad range of conditions.
Most of our coagulant products are formulated from organic polymers, aluminum salts and tannins to give unusually broad effectiveness over a range of pH, temperatures and turbidities, making them ideal replacements for conventional dual-treatment programs.
CED coagulants are also effective in oily wastewater applications such as emulsion breakers. Their use in conjunction with pH and temperature control enhances the speed of the emulsion break as well as improving clarity of the water.
The causes of foam in a wastewater treatment plant are varied. In secondary treatment systems, foam is typically caused by biological activity. However, foam can also be caused by mechanical action and chemical contamination. Surfactants in the influent or in some polymer treatments can also cause foam. Regardless of the cause, foaming in secondary treatment and final effluent areas can result in a variety of environmental, health and safety issues.
Our de-foamers comprise a range of proprietary products that effectively control foam and entrained air in municipal wastewater systems. In addition to collapsing or breaking down existing foam, the de-foamers remain on the water’s surface to prevent the formation of future foam. Common application areas include the activated sludge process, aerated lagoons and plant outflows.
Demulsifiers and Flotation Aids
Treating wastewaters containing oils, fats and solids is a difficult challenge. Such wastewaters are produced in large quantities by petrochemical, oil refining, metal processing and food processing plants. The undesirable oils contained in these waters are present either as emulsions or as very fine droplets that must be separated from the water prior to discharge.
Oily and fatty impurities in wastewaters typically exist as micro-droplets that can be easily skimmed or separated mechanically. However, emulsified oils and fats must first be converted into a free form by means of a suitable demulsifier, so that they can then be separated from the aqueous phase.
Our demulsifiers and flotation aids comprise a family of specially formulated organic products that effectively demulsify oils, fats and solids in industrial and municipal wastewaters. These novel products, which include cationic polymers and polymer blends, facilitate the purification of organically contaminated wastewaters without the addition of metal salts.
In addition to having an outstanding emulsion breaking effect, our products allow fine oil particles to be coagulated and then quickly floated to the water’s surface.
Our dewatering and thickening aids are organic, synthetic, water-soluble, acrylamide-based polymers. These polymers are specifically formulated to accelerate settling of solids and increase the solids density in thickeners, clarifiers, and tailings ponds. They also improve the efficiency of mechanical dewatering operations, such as disc, drum and belt filters, vacuum and pressure presses, and centrifuges.
Our flocculants are a clean solution for optimal liquid/solids separation in a variety of industrial and municipal processes. They are synthesized from organic, macromolecular, water-soluble polyelectrolytes that are based on polyacrylamide.
The flocculants are used to clean industrial and municipal wastewater, to treat process and circulation water and to clarify raw or surface water to produce drinking or industrial water. They can be used wherever effective liquid/solid separation is desired to accelerate the sedimentation or flotation of suspended solid particles and to improve the dewatering of thickened sludge during static or mechanical dewatering processes.
Our neutralizing/masking agents are formulated from organic compounds that effectively control odors and reduce the concentration of hazardous hydrogen sulfide gas from process and wastewater systems with minimal capital investment. The organic compounds react with the sulfur-containing gases to form stable compounds that are not released to the atmosphere.
Amerscent neutralizing/masking agents are applied as a liquid to the offending area in the water phase or as a spray into a vent or stack. The products are easy to handle and feed, and unlike metal salts, are not corrosive and do not produce sludge as a byproduct. Typical application areas include black liquor tank vents, non-condensable gas vents and tanks, scrubber bypass stacks and vessels requiring personnel entry.
Vessel entry times can be reduced compared to conventional air purging when these products are used to scavenge hydrogen sulfides in tanks during outages.
Wastewater plants that receive a lot of fat, oil, grease and surfactants contend with Nocardia formation. In small amounts, Nocardia are beneficial for the wastewater system because they add stability to the floc structure and keep it from breaking up or shearing. In large amounts, however, these branching bacteria can cause poor settling or poor foaming. Nocardia forms in activated sludge plants and sequencing batch reactors. CED’s Nocardia control products degrade the foam by reducing the surface tension.
In many industrial and municipal operations in which water flows, the formation of inorganic or mineral scales represents an imminent problem because it reduces plant efficiency. For example, thin scales on the surfaces of heat exchangers noticeably affect their efficiency and operating capacity. Likewise, scale buildup within pipes considerably reduces water flow and puts an increased strain on pumps and other associated equipment. Left unattended, particularly in areas where the water is very hard, scale can quickly lead to a total blockage of various lines and pipes.
CED scale inhibitors include a family of novel products that effectively control a wide variety of scales in industrial and municipal water systems. The products are specially formulated with polyacrylates, phosphonates and sulphonic acid acrylate copolymers and offer exceptional stabilization and dispersion properties.
The innovative composition of our Scale Inhibitor products ensures efficient scale inhibition over a wide range of system conditions.
Our tertiary treatment is utilized only where it is needed to protect the receiving waters from excess nutrients. Through CED’s tertiary treatment process, the concentrations of phosphorus or nitrogen are reduced through biological or chemical processes- to get turbidity levels to less than 2.0 NTU’s.