With adequate surface area per machine, and ensuring continuous action of the Little River Pond Mill® circulators through use of electricity or solar power (preferably with a battery backup), a lagoon environment can be turned into, and maintained in, an aerobic or facultative state. There is less opportunity for nitrate already in solution, in a circulator remediated lagoon, denitrifying to nitrous oxide in the field since the suspended solids are significantly reduced thereby potentially preventing the anaerobic conditions typical in the solids portion of liquid manure. We have also witnessed very low conversion of ammonium to nitrate so concerns over nitrate leaching should be minimal. Livestock waste typically does not need to meet municipal waste water standards for biological oxygen demand (BOD) or total suspended solids (TSS). With increased machine numbers and the appropriate surface area for each machine, we could however potentially produce a fertigation liquid from livestock waste with BOD's and TSS’s that meet municipal guidelines (if required). An added feature of Little River Pond Mill® circulator remediated liquid is the fact that it is homogenous due to the intense circulation action the waste encounters. This feature makes testing much quicker, easier, and more reliable. Note: Proper procedures for sample collection and handling must be followed. Alterations to the manure management plan should be addressed since the nutrients (form and ratio) in the Little River Pond Mill® circulator processed liquid livestock manure may be different than those of unprocessed liquid livestock manure. An example would be the significant decrease in organic nitrogen in the form of manure and more being contained in microbial bodies. Typically, unprocessed manure is higher in organic nitrogen in manure form and this nitrogen would be slowly released to the soil over time. The nitrogen in the LRPM processed liquid livestock manure has been exposed to oxygen and therefore a sizable portion of it may have been mineralized and in ammonium form thereby making a larger portion of the nitrogen available to the plant immediately. The fertigation liquid (Little River Pond Mill® circulator processed liquid livestock manure) can be analyzed a week or so in advance of pumping (emptying) the lagoon and nutrient additions or dilutions to it can be made according to crop and field requirements prior to field application. Note: When using circulators it is important to ensure foreign materials do not become entangled in the impeller. Foreign materials will prevent proper circulator action, will reduce or eliminate any significant benefits that circulation would typically provide, and may damage the circulator. The management practice of cleaning the circulator impeller is known as de-ragging. To decrease the requirement for de-ragging in non-separated lagoon systems, a small alteration in management practices can prevent a great deal of work and worry. If you would like to know more about de-ragging, please contact us at info@pondmill.com and we would be more than happy to assist you. - top -
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