Agitation & Aeration Equipment
April 30, 2008 by Innovations
An age-old accepted method of
raising the oxygen level of a fluid has been to spray the fluid into
the air and let the droplets attract oxygen as they fall to the
surface. The Fisher Pumps Fisher Pump Aerator system has several
features that offer improved efficiency and capability in this area.
An age-old accepted method of raising the oxygen level of a fluid has been to spray the fluid into the air and let the droplets attract oxygen as they fall to the surface. The Fisher Pumps Fisher Pump Aerator system has several features that offer improved efficiency and capability in this area.
A patent pending air manifold surrounds the intake of the pump. The preentrance of fluid, as it passes through the lower air manifold, draws air through the manifold. The air is blended together with the fluid as it passes through the impeller of the pump. The bubbles of air are much smaller due to this shearing action of the impeller, and this greatly improves the surface absorption of oxygen by the fluid. When the air and fluid mixture discharges from the pump, it passes through a tube equipped with a venturi system to allow the air/fluid mixture to bring in added air in high volume for even more oxygen transfer.
The entire mixture is discharged below fluid level to keep the air and fluid together for as long as possible for maximum oxygen transfer. A deflector on the end of the discharge can control the direction of the discharge flow. If the top of the fluid is the area that requires oxygenation, the discharge can be set horizontally. If solids on the bottom are required to be brought into suspension, the discharge can be lowered to a 45 degree angle to agitate the lower areas with the air/fluid mixture.
The intense biological action of Selective Inc’s Aerobisizer Aerator/Circulator is said to convert “waste” to valuable nutrients while drastically decreasing odor and pathogens.
Rotationally molded plastic gives the Aerobisizer long life and durability. The super-efficient MAGNUM model is said to take care of even the toughest situations with only two horsepower.
The results include elimination of odor, reduced solids and improvements in water quality, animal health and crops, according to the company. There is an increase in nutrient levels, and manure handling and pond management is no longer a chore, but easy and affordable.
The Aerobisizer moves a significant amount of water and improves water quality. It is also said to eliminate slick and slimy floors, eliminate algae, suppress disease, aid in separation and offer a quick payback.
The newest technological development from Absolute Aeration is the Blue Frog Constant Stir Tank Reactor (CSTR). Wastewater engineers have long designed pretreatment systems into wastewater plants to promote solids decomposition and improve bacterial growth. Lagoons have presented a problem as pretreatment of incoming solids has not been possible inside the lagoon.
Absolute Aeration’s CSTR is a combination of Blue Frog Aerators and Bio-Boom which is designed to contain and treat the lagoon influent for a minimum of six hours. Pre-treatment significantly promotes solids decomposition while providing optimum conditions for bacterial growth and multiplication.
The CSTR also provides the required mechanism for de-nitrification. By increasing the dissolved oxygen content inside the CSTR to above 2.5 ppm, the CSTR generates the proper conditions for de-nitrification bacteria to prosper. Once the bacteria leave the CSTR and enter the anoxic zone, they work to de-nitrify the lagoon. The Blue Frog Aerator is the only aerator that can provide the benefits of the CSTR, says the company.
Blue Frog has been shown to significantly reduce solids, eliminate odors, kill pathogens and significantly improve lagoon flush water.
J Houle & Fils Inc has different models of propellers available on its agitators, to agitate up to 33,500 US gallons. The larger screws offer faster agitation without splashing, and results in reduced odor. The units feature heavy duty propellers with bearings in an oil bath protected by a greasable three-seal mechanism. Features include 60 degree sideways articulation and 40 degree vertical articulation, which is standard on threepoint hitch, to break the crust from underneath. When directed down, the propeller strongly pulls chunks to accelerate agitation. The articulation drive line is in an oil bath. Units have a 540 rpm heavy duty drive line with #55 PTO.
Farm operators looking for a way to clean up their pond, lake or waste-water treatment lagoon or interested in pumping water to a stock tank or other location are advised to consider a Koenders Aeration System.
For over 18 years, Koenders has provided an economical and environmentally friendly way to enhance the condition of oxygen-starved water sources.
To keep ponds clean and healthy, water requires oxygen.
Without it, water turns anoxic, resulting in fish kills and bacterial growth. Through the process of aeration (supplying water with air), Koenders systems provide continuous oxygen to stagnant, unhealthy water, even in the winter. This perpetual air circulation ensures ponds remains healthy and won’t deteriorate during any season.
Koenders windmills also bring back a nostalgic feeling to farms—a symbol of the past, with the promise of the future—along with a feeling of stewardship, the company says. Illustrating the many benefits aeration can provide, Koenders systems help to reduce algae, bacteria and odor, reduce pond sediment, reduce the threat of West Nile Virus, and perhaps most importantly, improve livestock and fish health, says the company.
Manufactured with durable 18-gauge galvanized steel, Koenders systems are designed to aerate ponds up to two acres in size, though multiple systems can be combined to aerate a larger pond or lake.
Several accessories are available to enhance the functionality of the system, including a submersible water pump, vertical well pump, and a freeze control unit for extreme weather conditions.
Since Koenders windmills use wind power (as little as 3-5 mph winds) to bring oxygen back into ponds, little or no chemical treatment is necessary.
Aeration is a time-tested, reliable method used by wastewater treatment plants for odor control. Animal confinement facilities’ manure collection basins and lagoons can be aerated through mechanical aspirating aerators in a standard wastewater lagoon application. Aeration can be continuous or intermittent.
Aeration Industries International, Inc manufactures quality Aire-O2 aeration equipment and wastewater treatment systems, and has provided environmental solutions since 1974 with over 50,000+ aerators in operation in the US and more than 85 countries worldwide. The Aire-02 aspirating aerator is said to be an effective technology for manure lagoon treatment due to its efficient horizontal mixing capabilities and high velocity stream of “fine bubble” aeration, as defined by the US Environmental Protection Agency (EPA).
Aerobic (aeration treatment) is the most effective process to reduce odor from livestock operations, says the company. Using a descriptive scale varying from 0 (none at all) to eight (maximal), research done at North Carolina State University, coupled with results from swine manure aeration projects, showed that the Aire-O2 aerators were able to reduce odor intensity ranging from 6.5 (influent) to 0.75 (treated effluent), according to the company. Other research done in the United Kingdom (UK) found that a farm-scale, continuous aerobic treatment system was able to reduce odor concentrations by 50 to 75 percent with treatment times between 1.7 and 6.3 days.
Dairy Circul8 Photo-Pond Reactor (CPR) is a system power coupling vortex moving water and photosynthesis, arguably two of the most powerful natural phenomenon on the planet in a design-engineered natural photo-biological process. CIRCUL8 Systems create clean-by-design cow-, people- and community-friendly fresh air dairies without the usual odor, emission and vermin problems. CPR separates and processes undigested feed nutrients in liquids streams through phototrophs to valueadded products, before they have a chance to become manure or worse.
Engineered for facilitated biogeochemical processing, with vortex circulated sequential ponds, the CPR photo-biological processing system is said to bring new life to lagoons. It functions through transforming them and the resultant liquids, through photosynthetic purple sulfur microbes and other beneficial microbes, from noxious volatile organic carbon compounds (VOC’s) and other odor sources to sequestered nitrogen (N), sulfur (S) processing ponds, creating design-engineered liquids and clean fiber streams for value-added uses.
CPR products include ultra-clean fiber solids for clean further processing, clean ponds and stabilized N and S nutrient liquids, an abrasive surfactant effective cleaning bio-flush, and as a consequence, clean dairy facilities without the typical emissions, odor and flies.
Advanced Aeration Inc’s innovative Vacuum Bubble Technology is said to have revolutionized the use of aerobic waste management systems in commercial, residential, agricultural and industrial applications. The technology addresses the problems of biochemical oxygen demand (BOD) and waste treatment by improving the performance of aerobic bacteria to consume organic wastes.
The company says the Vacuum Bubble Technology Aerator 300 is ideal for mid-sized CAFO facilities. This unit has a floatation platform available as an option.
Specifications on the VBT 300: cubic feet/minute (air), 5.23; cubic feet/day (air), 7536; lbs oxygen/day, 132; lbs O2/hp/hour, 5.50; approximate flow (gal/day) @ 300 PPM BOD5, 18000; motor, WEG 1 hp; voltage 1 phase, 120/240/full load amps 12.0/6.0; voltage three phase, 230/460/ full load amps 3.2/1.6; motor diameter, 7”; motor height/one phase, 11”; motor height/2 phase, 8.50”; air tube length, 23”; air tube diameter, 8”; min water line, 6”; max water line, 14”.
Nutrient Control Systems
The INTEGRITY Nutrient Control System begins with the separation of the liquid from the manure solids. This allows greater flexibility in treatment, nutrient management and land application. The separated solids and settled sludge contain most of the nutrients, yet constitute only a very small portion of the total waste stream that can be selectively and conveniently land applied, or composted and sold.
The liquid is sent to the main treatment basin (lagoon) where it is subjected to inductive aeration. Odor-producing anaerobes (bacteria that thrive without oxygen) are replaced by aerobic microorganisms. These oxygen-loving bacteria stabilize nutrients, digest organic matter up to 20 times faster than anaerobic bacteria and do not produce unpleasant odors.
The INTEGRITY aeration system creates an oxygenated zone or cap on top of the lagoon. Beneath this cap, anaerobic bacteria break down and digest the solids that create odorous and noxious gases such as hydrogen sulfide, ammonia and methane. The oxygen cap prevents these gases from reaching the atmosphere. Instead they are oxidized and the unpleasant lagoon odor is eliminated, the company says.
The liquid is now treated wastewater that is virtually odor free and very low in nutrient values. It can be land applied in much higher volumes per acre while still meeting nutrient planning requirements.
The INTEGRITY PulseJet permits application of the liquid at a precisely controlled rate adjustable from .009 to .05 inches/acre/hour. The liquid is delivered only to the root zone over an extended period of time so the INTEGRITY PulseJet can be used under wet conditions and without fear of run-off.
Little River Pond Mill
There are many aeration systems used in livestock facilities, and according to Sunset Solar Systems Ltd, it was the first to put out the recirculating toroidal vortex flow circulator, in 1983, which promotes reaeration of livestock waste.
The patented Little River Pond Mill circulator, available in electric, wind and solar models, is said to have a unique flow pattern that brings liquid livestock waste up from the bottom of the lagoon to the surface where it is exposed to UV rays and oxygen. The superior action of the impeller circulates at a phenomenal rate of 9 m3/sec (7.1 million Imperial gph) and ensures oxygen and the livestock lagoon contents are completely circulated, according to the company.
The circulator promotes effective liquid composting which can eliminate pathogenic organisms, reduce solids/sludge depth, stabilize nutrients, and eliminate/reduce the production of noxious and potentially harmful odorous and non-odorous gases including greenhouse gases and acid rain producing emissions. The company says significant cost savings are seen when using the Little River Pond Mill circulator through decreased capital expenditures and farm input costs, low maintenance costs, reduced environmental and social environmental costs, and reduced water and energy consumption. Clients have witnessed annuals savings of greater than $10,000 in reduced electrical costs alone when treating livestock waste. The process can enhance nutrient management and farm safety practices, besides promoting improvements in soil and plant health.
The Vortitech System from JND Thomas Company is said to change waste management systems into nutrient management systems. Aeration by circulation using the Vortitech system creates an organic fertilizer that can be delivered at an agronomic rate to improve soil health, crop growth and yields.
The Vortitech System allows farms to use conventional irrigation equipment without clogging valves, nozzles and screens.
The system uses the power of a vortex to circulate the total contents of lagoons, ponds, or other bodies of water.
As the Vortitech rolls and churns the water in a lagoon, the action exposes the contents to the surface. This allows the most efficient form of oxygen transfer, absorption of oxygen from the atmosphere, to occur.
By replenishing the supply of oxygen to the lagoon, aerobic bacteria thrive. Aerobic bacteria can break through organic material at a rate five times faster than their anaerobic counterparts, says the company.
Aerobic bacteria, in the presence of dissolved oxygen, convert organic matter to stable forms such as carbon dioxide, water, protein and other cell components. The Vortitech System is an economical and efficient method for transforming a typical anaerobic lagoon into a facultative, nutrient-rich, lagoon with fewer odors, the company says. The Vortitech System provides needed circulation and oxygen, moving oxygen rich water from top to bottom, suspending nutrients evenly while preventing build-up of solids. This eliminates the major odor causing products of anaerobic breakdown, which are ammonia and hydrogen sulfide.
J Star Industries
J-Star features tough, powerful and reliable commercial prop agitators, with lengths of 32’, 42’ and 50’.
The agitators feature a 28” heavy duty, three-blade prop which is rated at 120 hp at 540 rpm. They offer fast agitation of large lagoons, with 10,000 gpm agitation. Featuring an 8” by 8” main body, the agitators have curved blades for maximum thrust. They have oil bath lower bearings and seal assemblies for long life and low maintenance. There is a built-in grease gun for the lower seals. The agitators feature high-lift legs for high bank lagoons and a wide stance trailer for stability.
Seven Star Aeration
Seven Star Aeration offers the livestock industry a simple alternative to conventional aeration. The Ultra Venturi Aerator is a unique aerator that has the ability to add oxygen to wastewater with one of the highest efficiency ratings in the industry. This land-based aerator draws wastewater from the bottom of a wastewater pond where the water is the lowest in dissolved oxygen. The Venturi tube—the heart of the Ultra Venturi Aerator—produces micron-size bubbles created by the dramatic pressure drop within the expansion chamber. This creates an environment where the oxygen is rapidly absorbed by the wastewater.
The Ultra Venturi Aerator is said to be the only aerator in the industry that has the ability to draw waste water from the bottom of the waste water pond and discharge the aerated water near the surface. The mixing of cool wastewater from the bottom of the pond with the warmer surface water eliminates the variation of temperature within the pond. This, along with the large circulation, creates an environment that is excellent for microbial growth, the companys says.
The Ultra Venturi Aerator is unique in its simplicity and one of the most cost effective aerators on the market, according to the company.
Anderson Bio Systems
The Anderson submersible mixers range in power from 12.5 to 25 horsepower and can move up to 29,450 gallons per minute. They feature a stainless steel, direct drive propeller and a positive mechanical seal for long life. The units are engineered like a Porsche and built like a tank, the company says. Anderson equipment is available in North America exclusively through Anderson BioSystems.