Jet Aeration and Jet Mixing Systems for Use in Waste Water and Tank Based Applications
About Us
Mixing Systems, Inc. (MSI), a Dayton, Ohio based manufacturer of submerged jet aeration and jet mixing systems, has been successfully designing waste water treatment systems since 1985. Mixing Systems, Inc. has engineers with over twenty years experience in design, application, marketing and manufacturing of jet aeration systems. Employees include a former Project Manager of the company which pioneered jet aeration systems. Designs are computerized, enabling Mixing Systems, Inc. to respond to your needs with custom designs and proposals in just one to three days. The jet mixing system works on the principle of one fluid contacting another fluid or gas through a series of jet nozzles. Intense mixing and contacting occurs in a common mixing chamber between concentric inner and outer nozzles. The inner nozzle takes recirculation liquid from the tank and creates a stream of liquid traveling at thirty feet per second (twenty miles per hour). Air is introduced into the outer nozzle, causing intense mixing of the air and liquid in the space between the inner and outer nozzle. The outer nozzle shoots the gas/liquid mixture into the surrounding tank liquid, producing a plume of fine bubbles. The plumes travel horizontally and spread throughout the tank before rising to the surface. The expanding jet plumes keep the tank liquid in continual motion and result in excellent mixing. Jet mixing systems are ideally suited for application in Industrial waste water aeration Municipal waste water aeration Aerobic and anaerobic sludge digestion Equalization Post-aeration Chemical oxidation Disinfection using chlorine or ozone Flash mixing Flocculation Mixing stormwater tanks A variety of products are available through MSI. Each system is individually designed to meet customer specifications. The standard material of construction is fiberglass reinforced plastic. However, units are also available is 304 stainless steel and 316 stainless steel design. MSI offers: Eddy Mix Jet Aerators (EMJA) Directional Mix Jet Aerators (DMJA) Bidirectional Mix Jet Aerators (BMJA) Jet Disinfection Units Aspirating Jet Mixers Mixing Systems, Inc. has some of the largest aeration installations in the world. MSI has supplied systems for many large wastewater treatment plants in the following industries: Pulp and Paper Chemical Food Textile Petro-Chemical Pharmaceutical Mixing Systems, Inc. aeration systems range from 50,000 gallons per day to 40 million gallons per day (MGD). BOD loads range from 1,000 pounds per day (lb/day) to 100,000 lb/day. Aeration tank volumes range from 50,000 gallons to 240 million gallons. Connected horsepower ranges from 20 to 4,000. Typical shipment range is two to twelve weeks from date of order. Jet Aeration and Jet Mixing Installations Pulp and Paper Industry Appleton Papers Celgar Pulp Company Consolidated Papers, Inc. Fibreco Pulp Inc. Fletcher Challenge Georgia Pacific Kimberly Clark MacMillan Bloedel Millar Western Pulp Ltd. Quesnel River Pulp St. Marys Paper Tripap West Carrollton Parchment Weyerhaeuser Textile Industry Burlington Industries Dundee Mills Indorayon Texprint, Inc. Chemical Industry American Cynamid Company Aries Chemical BASF Corporation Cain Chemical Plant Canadian Oxy Industrial Cecos International Celanese Fibers Operations Chemco Equipment Company Chemical Products, Inc. Ciba Geigy Corporation Cookson Pigments, Inc. Dow Chemical E.I. Dupont Eastman Chemical Formosa Plastics Hilton Davis Chemicals Kerr-McGee Chemical Mobay Chemical Corporation Occidental Chemical Sterling Wintrop Union Carbide Pharmaceutical Industry Bayer Corporation Ciba Geigy Corporation Merck Chemical Schering Plough, Ireland Warner-Lambert Food Industry ADM (Archer Daniels Midland) Alabama Feed Products Anheuser-Busch Brewery Armour Swift-Eckrich Cargill, Inc. Carolina By-Products Coca Cola Products, Inc. Frito Lay, Inc. International Flavors Lipton Nabisco Foods Tropicana Tyson Foods Wampler-Longacre Chicken Wawa Dairies Municipal and Utilities Anniston Water Works, AL Appleton, Wisconsin (Zebra Mussels) Cambridge, Minnesota Cleveland Electric Illuminating Heath, Ohio Las Virgenes, California Middleburg, New York Morris County, New Jersey Nelsonville, Ohio Ocean County, Pennsylvania Plainview, Minnesota Roxbury, New Jersey Staples, Minnesota Sussex County, New Jersey Talladega, AlabamaTroy, Ohio Petro-Chemical Industry Amoco Canadian Occidental Exxon Georgia Gulf Gulf Coast Waste Disposal Pemex Refinery, Mexico Star Enterprise Texaco Refineries Specialty Industry Brush Wellman, Inc. Chrysler Corporation General Electric IBM NASA Huntsville, Alabama Norfolk Naval Shipyard Pacific Ship Building Thiele Tanning Company Westinghouse (Nuclear) William Bonnell Company U.S. Department of Energy, Fernald Plant Waste Management Westinghouse Whirlpool Click here to visit our website
Mixing Systems, Inc. (MSI), a Dayton, Ohio based manufacturer of submerged jet aeration and jet mixing systems, has been successfully designing waste water treatment systems since 1985. Mixing Systems, Inc. has engineers with over twenty years experience in design, application, marketing and manufacturing of jet aeration systems. Employees include a former Project Manager of the company which pioneered jet aeration systems. Designs are computerized, enabling Mixing Systems, Inc. to respond to your needs with custom designs and proposals in just one to three days.
The jet mixing system works on the principle of one fluid contacting another fluid or gas through a series of jet nozzles. Intense mixing and contacting occurs in a common mixing chamber between concentric inner and outer nozzles. The inner nozzle takes recirculation liquid from the tank and creates a stream of liquid traveling at thirty feet per second (twenty miles per hour). Air is introduced into the outer nozzle, causing intense mixing of the air and liquid in the space between the inner and outer nozzle. The outer nozzle shoots the gas/liquid mixture into the surrounding tank liquid, producing a plume of fine bubbles. The plumes travel horizontally and spread throughout the tank before rising to the surface. The expanding jet plumes keep the tank liquid in continual motion and result in excellent mixing.
Jet mixing systems are ideally suited for application in
A variety of products are available through MSI. Each system is individually designed to meet customer specifications. The standard material of construction is fiberglass reinforced plastic. However, units are also available is 304 stainless steel and 316 stainless steel design. MSI offers:
Mixing Systems, Inc. has some of the largest aeration installations in the world. MSI has supplied systems for many large wastewater treatment plants in the following industries:
Mixing Systems, Inc. aeration systems range from 50,000 gallons per day to 40 million gallons per day (MGD). BOD loads range from 1,000 pounds per day (lb/day) to 100,000 lb/day. Aeration tank volumes range from 50,000 gallons to 240 million gallons. Connected horsepower ranges from 20 to 4,000. Typical shipment range is two to twelve weeks from date of order.
Pulp and Paper Industry
Textile Industry
Chemical Industry
Pharmaceutical Industry
Food Industry
Municipal and Utilities
Petro-Chemical Industry
Specialty Industry
Click here to visit our website
Benefits of Jet Aerators and Jet Mixers
Mixing Systems, Inc. submerged jet aeration and jet mixing systems are easier and less expensive to install than comparable diffused aeration systems. All equipment is supplied in prefabricated sections that are easily assembled using field joints or flanged connections. In addition, the jet aeration system contains no in-basin moving parts. All mechanical assemblies such as pumps and blowers are placed outside the tanks where they are easy to service. Combined with an optional pneumatic backflush system designed to eliminate clogging, the systems are virtually maintenance free. Aeration is often considered to be the heart of the effluent treatment system at most wastewater treatment plants. The correct selection of an aeration system is crucial because the operation of the aeration system requires about 80% of the total operating power cost for a wastewater treatment plant. Mixing Systems, Inc. jet aeration systems provide both environmentally conscious and cost effective operation. Built of quality components with an established reputation for reliability, Mixing Systems' jet aeration systems have shown energy reductions of up to 40% over other aeration methods. In addition, during periods of low service demands, air flow rates can be reduced by controlling and varying the blower output. By regulating the air flow to the aeration system, oxygen transfer rates can be controlled without affecting the mixing efficiency or solids suspension and additional energy savings are achieved. Process Benefits of Jet Aerators Fine bubble aeration Cost effective Superior oxygen transfer High alpha factor Energy efficient Thermal energy conservation Eliminates splashing Consistent, uniform mixing Independent control Deep tank operation Low off-gases Toxicity removal Mechanical Benefits of Jet Aerators Proven technology Quality manufacturing Corrosion resistant Low maintenance Increased reliability No moving parts No small passages Optional backflush Reliable pumps and blowers Fast, easy installation Flexible operation Custom designs Benefits of Jet Mixers No in-basin moving parts Ideal when liquid level fluctuates Control of mixing intensity No structural supports required No long shafts or submerged bearings Effective in both large tanks and deep tanks No special baffles required Corrosion resistant Installed close to the tank bottom where solids settle May be used to introduce chemicals Fine bubble diffusion option
Mixing Systems, Inc. submerged jet aeration and jet mixing systems are easier and less expensive to install than comparable diffused aeration systems. All equipment is supplied in prefabricated sections that are easily assembled using field joints or flanged connections. In addition, the jet aeration system contains no in-basin moving parts. All mechanical assemblies such as pumps and blowers are placed outside the tanks where they are easy to service. Combined with an optional pneumatic backflush system designed to eliminate clogging, the systems are virtually maintenance free.
Aeration is often considered to be the heart of the effluent treatment system at most wastewater treatment plants. The correct selection of an aeration system is crucial because the operation of the aeration system requires about 80% of the total operating power cost for a wastewater treatment plant. Mixing Systems, Inc. jet aeration systems provide both environmentally conscious and cost effective operation. Built of quality components with an established reputation for reliability, Mixing Systems' jet aeration systems have shown energy reductions of up to 40% over other aeration methods.
In addition, during periods of low service demands, air flow rates can be reduced by controlling and varying the blower output. By regulating the air flow to the aeration system, oxygen transfer rates can be controlled without affecting the mixing efficiency or solids suspension and additional energy savings are achieved.
Process Benefits of Jet Aerators
Mechanical Benefits of Jet Aerators
Benefits of Jet Mixers
Proven Technology
The technology of jet aeration and jet mixing involves combining two fluid streams in a common mixing chamber. One stream is typically a liquid and the second stream is usually a gas. With jet mixing the second stream is another liquid, often entrained from the tank itself. The basic components of the jet aeration or jet mixing system are: Dual concentric jet nozzle Piping for the two fluid streams Pumps to create fine bubbles and circulate the tank Blowers, for jet aeration systems, to supply the pressurized air flow One reason jet aeration is more effective than other methods of aeration is because the system utilizes multiple oxygen transfer zones. High contact zone within the nozzles: Oxygen transfer begins when a stream of recirculated liquid from the inner nozzle comes in contact with a stream of pressurized gas, creating an intense mixing action in the chamber between the inner and outer nozzle. The intimate contact between the gas and liquid streams results in micron-size bubbles. High pressure zone at the tank bottom: Next, oxygen transfer continues as a plume of fine bubbles, from 0.1 to 1 mm in diameter, is ejected horizontally through the outer nozzle into the main tank volume. The horizontal travel of the plume maintains the gas/liquid transfer interface for a much longer period of time than conventional diffused air systems. This high pressure condition gives the gas bubbles a greater opportunity to dissolve in the liquid, increasing the oxygen absorption efficiency. In addition, injection of the plume into the tank volume thoroughly mixes the tank and keeps the solids in suspension. Buoyancy bubble rise: As the momentum of the horizontal plume dissipates, the bubbles, now 1 to 3 mm in diameter, rise to the surface creating an air lift effect allowing for further molecular dispersion and absorption of oxygen. Surface agitation: To further enhance oxygen transfer, the liquid momentum near the tank surface draws the air bubbles from the tank surface and redistributes it through the tank volume. Since all aeration and mixing occurs below the surface, there is no mist or spray problems. There are also no icing problems because the jet aerators eliminate thermal stratification and prevent freezing. Alpha Factor Jet aeration systems yield a higher alpha factor than fine pore membrane and ceramic type aeration systems. Because of the high shear within the jet nozzles, jet aerators produce a high surface renewal at the gas/liquid interface. Most wastewaters have surfactants present. The surfactants create a resistance to oxygen transfer at the gas/liquid interface. The film thickness is the smallest (lowest resistance) with high shear aeration devices such as jet aerators and surface aerators. In actual wastewater treatment plants, due to the high alpha factor achieved by the jet aerators, a lower design standard oxygen is required than with fine pore diffused aeration systems. This is one of the benefits of using jet aerators in wastewater generated from pulp and paper, pharmaceutical, chemical and brewery industries. These wastewaters normally have surfactants present in them and therefore jet aerators are very efficient. The total energy consumed for treatment of these wastewaters is 20% to 30% lower with jet aeration systems than with fine pore diffused aeration systems.
The technology of jet aeration and jet mixing involves combining two fluid streams in a common mixing chamber. One stream is typically a liquid and the second stream is usually a gas. With jet mixing the second stream is another liquid, often entrained from the tank itself. The basic components of the jet aeration or jet mixing system are:
One reason jet aeration is more effective than other methods of aeration is because the system utilizes multiple oxygen transfer zones.
High contact zone within the nozzles: Oxygen transfer begins when a stream of recirculated liquid from the inner nozzle comes in contact with a stream of pressurized gas, creating an intense mixing action in the chamber between the inner and outer nozzle. The intimate contact between the gas and liquid streams results in micron-size bubbles.
High pressure zone at the tank bottom: Next, oxygen transfer continues as a plume of fine bubbles, from 0.1 to 1 mm in diameter, is ejected horizontally through the outer nozzle into the main tank volume. The horizontal travel of the plume maintains the gas/liquid transfer interface for a much longer period of time than conventional diffused air systems. This high pressure condition gives the gas bubbles a greater opportunity to dissolve in the liquid, increasing the oxygen absorption efficiency. In addition, injection of the plume into the tank volume thoroughly mixes the tank and keeps the solids in suspension.
Buoyancy bubble rise: As the momentum of the horizontal plume dissipates, the bubbles, now 1 to 3 mm in diameter, rise to the surface creating an air lift effect allowing for further molecular dispersion and absorption of oxygen.
Surface agitation: To further enhance oxygen transfer, the liquid momentum near the tank surface draws the air bubbles from the tank surface and redistributes it through the tank volume. Since all aeration and mixing occurs below the surface, there is no mist or spray problems. There are also no icing problems because the jet aerators eliminate thermal stratification and prevent freezing.
Jet aeration systems yield a higher alpha factor than fine pore membrane and ceramic type aeration systems. Because of the high shear within the jet nozzles, jet aerators produce a high surface renewal at the gas/liquid interface.
Most wastewaters have surfactants present. The surfactants create a resistance to oxygen transfer at the gas/liquid interface. The film thickness is the smallest (lowest resistance) with high shear aeration devices such as jet aerators and surface aerators.
In actual wastewater treatment plants, due to the high alpha factor achieved by the jet aerators, a lower design standard oxygen is required than with fine pore diffused aeration systems. This is one of the benefits of using jet aerators in wastewater generated from pulp and paper, pharmaceutical, chemical and brewery industries. These wastewaters normally have surfactants present in them and therefore jet aerators are very efficient. The total energy consumed for treatment of these wastewaters is 20% to 30% lower with jet aeration systems than with fine pore diffused aeration systems.
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