The Little River Pond Mill Purifying The World

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Frequently Asked Questions
  1. What is it and what does it do?
  2. Will you guarantee that it will work?
  3. If it doesn't work can I get my money back?
  4. You aren't blowing any air in. How does it get air into the liquid?
  5. Would this be as good as air-pumpers/injection for putting oxygen in the liquid?
  6. What does it do for salt (minerals) or pH?
  7. Won't it make a lagoon smell worse if you mix it up like that?
  8. How would it remove the odour from my lagoon?
  9. Would I still have to agitate (slurry) my sewage lagoon before I pump it out?
  10. How could it remove the sludge in my sewage lagoon?
  11. How long would it take to remove the sludge in my sewage lagoon?
  12. Would I lose the fertilizer value using this liquid composting process in my livestock lagoon?
  13. Wouldn't this be hard on the land if I apply it to the same field each year?
  14. Can you get enough oxygen in the lagoon with that impeller to remove the odour?
  15. Would the machine be good for fish?
  16. I've got a pond that we use for the house. Would it do anything for that smelly water in the winter and what would it do for the algae?


 

  1. What is it and what does it do?
    The Little River Pond Mill® circulator is a biogeochemical (BGC) remediation facilitator/biological stimulator. Big words! In simple terms, it is a machine that circulates the water and promotes the natural life cycle processes (nutrients, oxygen, and aquatic animals, plants, and insects) to function more effectively.
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  2. Will you guarantee that it will work?
    The machine will do what it is supposed to do - circulate liquid and promote passive re-aeration at the surface (air-water interface). The circulation that the machine creates transfers oxygen throughout the body of liquid. If you have adequate machines numbers, if you have an adequate retention time, if all the biotic and abiotic factors required are available, you should be another happy customer for your application.
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  3. If it doesn't work can I get my money back?
    If the machine isn't working we can provide repair personnel. If the remediation system isn't functioning we have professional personnel that can assist in trouble-shooting so that you achieve your desired result.

    Machine Installation on a Pond
    Assiniboia, SK, Canada
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  4. You aren't blowing any air in. How does it get air into the liquid?
    Oxygen is being input in two ways.
    1. The first pathway involves passive transfer of oxygen at the liquid-air interface via a recirculating toroidal vortex bringing liquid to the surface where it radially flows across the surface. Oxygen transfer at the surface is close to 100% efficient when compared with bubble systems that have efficiencies ranging from 5 - 40% with micro-bubble systems having the highest efficiency of the air-injection systems. The smaller the bubble size the greater the oxygen transfer efficiency; the smallest bubble size is at the molecular level.
     
    2. The second pathway involves promoting active transfer of oxygen through input by photosynthetic bacteria and algae living within the liquid. Remember, the machine promotes a healthy aquatic environment and a balance of organisms, including algae, cyanobacteria and aquatic vegetation.
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  5. Would this be as good as air-pumpers/injection for putting oxygen in the liquid?
    It would be as good or better. Air injection systems do not have one crucial component in the aeration process the circulation. The circulation component is vital for ensuring oxygen is circulated throughout the lagoon, container, pond or lake. The oxygenated water is circulated throughout the entire pond via the recirculating toroidal vortex created by the impeller. It should be noted that with an optimum flow velocity of about 9 m3/s (7.1 million gallons/h) and an effective radius of at least 14 m (46 feet) (depends on the liquid type, temperature, etc.), there is substantial radial movement of water at the liquid-air interface.

    Air-injection systems typically have a slow, negligible or ineffective circulation current created by the movement of bubbles to the surface. Some of the most efficient air bubble systems have seen a theoretical circulation of 4.2 million litres/24 h (1 million gallons/24 h) when compared to the
    Little River Pond Mill® circulator which exceeds 7 times that value per hour. Unless the oxygen and the nutrients are being adequately circulated how are the non-mobile aquatic organisms going to effectively survive?

    Many of the air pumper/injection systems require addition of chemicals to assist in binding up of nutrient and suspended solids components. The
    Little River Pond Mill® circulator promotes alteration of the chemical conditions within the liquid through natural biogeochemical processes and addition of chemicals is not recommended since it typically interferes with, and in many instances destroys, the natural processes we are trying to promote.

    In some wastewater treatment processes, use of the
    Little River Pond Mill® circulator along with the chemicals enhances the chemical addition and a reduction in quantity of chemical use due to improved efficiency has been observed.

    Nutrient (if desired) and solids removal can be effectively achieved by enhancement of the biological and geochemical activity within the water through use of the LRPM Aerobic Remediation System - all without the use of potentially harmful chemicals

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  6. What does it do for salt (minerals) or pH?
    The action of the Little River Pond Mill® circulator has been shown to alter pH (increase or decrease) as a result of various naturally occurring chemical interactions, however the machine action cannot eliminate salts, i.e. calcium, magnesium, potassium, sodium, from the ecosystem. Aquatic species remove mineral salts for metabolic processes, and others may become bound (permanent and/or temporary) to mineral and/or clay surfaces; however, they will ultimately remain within the ecosystem unless removed by organisms or through various chemical processes.
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  7. Won't it make a lagoon smell worse if you mix it up like that?
    Liquid manure/sewage and waste water lagoons smell as a result of gases produced by anaerobic (without the presence of oxygen) decomposition of organic substances or the release of odorous volatile intermediates. The introduction of oxygen and circulation promotes the creation of bioflocs and/or biofilms (BAF biologically active filtration) that degrade the organics (essentially they eat them) within the lagoon - aerobically. Aerobic decomposition is more complete than anaerobic and occurs without the production of noxious odours and potentially detrimental gases.
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  8. How would it remove the odour from my lagoon?
    The Little River Pond Mill® circulator itself doesn't remove the odour. The circulation created by the circulator assists in initially venting some stored gases and promotes a recycling of the volatile gases within the system. It also assists in aerobic decomposition of organics, which means the odours and gases aren't being created in the first place.
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  9. Would I still have to agitate (slurry) my sewage lagoon before I pump it out?
    Assuming you have adequate machine numbers to handle the workload (with respect to your retention time and nutrient/organic loading), and assuming environmental conditions haven't slowed the remediation process signficantly, there should be no requirement for agitation of the lagoon prior to pumping it out. The microorganisms should have digested (eaten) down the solids components to the equivalent of a liquid fertilizer solution.
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  10. How could it remove the sludge in my sewage lagoon?
    The machine itself doesn't remove the sludge. The machine promotes the biological processes (aerobic liquid composting or BAF biologically active filtration) through which the solids are digested (eaten) down. The microorganisms decompose (digest) the solids and utilize the carbon (for energy) and the nutrients in the sewage to grow and increase their numbers in much the same manner that our bodies utilize the food we eat.
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  11. How long would it take to remove the sludge in my sewage lagoon?
    This is almost like asking how long is a string. The time element depends on a number of factors including organic/nutrient loading, initial depth of sludge, number of machines used, retention time, presence of chemicals that may slow the remediation process, i.e. antibacterials, ..., environmental factors such as temperature, just to name a few. Some of the factors involved in reducing remediation time include a large surface area (for oxygen transfer), presence of optimum remediation temperatures (e.g. 20-45 C), utilization of adequate or excess machine numbers for your desired retention time just to name a few.
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  12. Would I lose the fertilizer value using this liquid composting process in my livestock lagoon?
    The final fertilizer value will depend upon the nutrient content of the manure going through the liquid composting process and how soon you get the lagoon working more aerobically. Aerobic liquid composting promotes mineralization of nutrients and thus stabilization of those nutrients. Volatile nutrients such as nitrogen and sulfur, which would typically vent off either in the lagoon or during land application, will become stable and will remain in solution using this process. The final fertigation (liquid fertilizer solution) liquid is homogenous and makes nutrient testing fast, easy and reliable. Nutrient ratios of the raw manure (C:N:P:S) will also affect the final nutrient content; microbes will also temporarily utilize some of the nutrients so some nutrients will be stored in their bodies.
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  13. Wouldn't this be hard on the land if I apply it to the same field each year?
    Let me rephrase this question. Would application of this remediated liquid burn my crop or contaminate surface or ground water?

    As with any proper nutrient management plan, a farmer/producer should know what nutrients are in the soil, what is required by the crop in any given year, and what the fertilizer value is of the fertilizer solution being applied. In this case, the liquid is known as fertigation liquid since the remediated liquid manure contains nutrients that will be used to fertilize a crop/land typically via irrigation equipment. The fertigation liquid and the soil should be tested prior to fertigating to insure that nutrient excesses or deficiencies will not be a problem to crop growth.

    With respect to ground water contamination - proper irrigation and nutrient management practices should prevent this potentially serious problem.
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  14. Can you get enough oxygen in the lagoon with that impeller to remove the odour?
    Assuming there are adequate machine numbers and adequate surface area per machine required, anaerobic decomposition should not be occurring and therefore the production of odours should not be a problem.
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  15. Would the machine be good for fish?
    Since the machine promotes both passive and active aeration in surface waters, and since many fish die as a result of oxygen deprivation during mid to late winter and immediately following algae and cyanobacteria blooms in the summer, the machine is very good for fish. The machine enhances the natural cycling processes within the surface water thereby increasing natural diversity, increasing availability of both food and oxygen, and in general - making the environment that the fish live in more conducive to growth and reproduction. Because the machine promotes degradation of organics and synthetics, the machine may promote the degradation of chemicals/hormones,... that have been proven harmful to fish reproduction and growth processes.

    2 - 3 year old Rainbow Trout
    Raised in a 1.8 million gallon pond
    Assiniboia, SK, Canada

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  16. I've got a pond that we use for the house. Would it do anything for that smelly water in the winter and what would it do for the algae?
    The machine will assist in reversing and preventing both conditions. Smelly water in winter is a result of anaerobic gases production. The gases are produced as a result of anaerobic (without the presence of oxygen) decomposition of organics (i.e. leaf matter) in the pond by microorganisms. Because the machine is promoting both passive and active aeration, the pond should not become anaerobic, even during winter, and therefore result in odourless water throughout the winter months. One often over-looked point in good quality water is the condition of the well beside many dugouts/ponds. The well can become quite stagnant and should be aerated to keep water quality good. We have recently developed a solar-powered well aerator to assist in maintaining a clean well and water transmission lines.


    Well Aerator
    Assiniboia, SK, Canada


    Algae and cyanobacteria blooms on your pond during summer months are a result of eutrophication. The algae and cyanobacteria feed off the nutrient rich waters and because there are limited grazers and competition for the nutrients, the algae and cyanobacteria become overpopulated. Some algae and cyanobacteria growth is necessary in any properly functioning aquatic ecosystem; however, algae and cyanobacteria blooms indicate that the system is not functioning properly; there is a missing link. In most cases, this missing link is additional oxygen and circulation which promote the growth of other organisms and assists in tying up of nutrients such as phosphorus. The added oxygen replaces the oxygen that microorganisms use in decomposing dead algae and other plants and animals. The circulation ensures that both nutrients and oxygen are circulated throughout the pond so that the whole pond functions properly. Both the oxygen and the circulation will assist the pond in returning to a fresher state. Remember the ponds in the old days when we used to have frogs and lots of different types of minnows, bugs, and water fowl? There was a diversity of both plants and animals. The machine will assist your pond in returning to a healthy state once again.
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