Maintain or Reduce Nutrient Levels
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Nutrient values can be altered with the Little River Pond Mill^® circulators by altering nutrient to carbon ratios, promoting immobilization by microbes, through the adsorption or fixation of nutrients by clay minerals and other elements (formation of complexes), getting the solution aerobic quickly, and a variety of other methods.

1. Nutrient values

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   Nutrient values in municipal effluent rapidly and significantly reduced. Total nitrogen (TKN) values decreased from greater than 60 mg/L to less than 1 mg/L, ammonia levels decreased from greater than 40 mg/L to less than 1 mg/L and phosphorus values decreased from greater than 10 mg/l to less than 1 mg/l in less than 2 months. Enviro Series 600.
   
    

2. Ammonia

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   1. * USA hog processing facility, intermediate, aerobic lagoon.
      * Size: 30 surface acres with a 5 foot depth.
      * Daily input: 2 million gallons of wastewater from processing of 16,000 hogs.

      The lagoon had the required number of 200 hp aerators in operation for many years prior to pond mills installation, however they were not working effectively so 18 pond mills were installed.

      Table 5.0 Ammonia content of intermediate aerobic
      lagoon before and after installation of Little River Pond Mill^® circulator

      Date	Ammonia (ppm)
      May 18, 1995 Prior to machines installation	110-120
      July 24, 1995 60 days after machines installation	less than 2

      
      
      

   2. Pond mills installed on trailer court sewage lagoon, Nebraska, USA, March 25, 1995

      Table 6.0  Ammonia reduction in a trailer court sewage lagoon

      Date	Ammonia (mg/L)
      March 09, 1995	10.6
      June 21, 1995	2.2

      
       
   3. Ammonia reduction in a municipal sewage lagoon - Ontario, Canada, 1991
      
      
      Figure 4.0 Comparison of ammonia concentration in influent vs
      Little River Pond Mill^® circulator treated effluent in a municipal sewage lagoon
      
      
       
   4. Ammonia reduction in a municipal sewage lagoon - Ontario, Canada, 1994
      
      
      Figure 5.0 Municipal wastewater ammonia
      change over time using a Little River Pond Mill^® circulator
      
      
       
   5. Significant reduction in both the dugout and sewage lagoon studies.  (C. Ruiu et. al., 1998)
      
       
3. Phosphorus

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   1. Phosphorus reduction in a municipal sewage lagoon - Ontario, Canada, 1994
      
      Figure 6.0 Municipal wastewater total phosphorus
      change over time using a Little River Pond Mill^® circulator
      
      
      
       
4. Total Kjeldahl Nitrogen (TKN)

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   1. Reduction of TKN in a municipal sewage lagoon - Ontario, Canada, 1991
      
      Figure 7.0 Reduction of TKN in a municipal sewage lagoon
      
      
       
5. Fertilizer value

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   1. One pond mill installed on a 110 sow farrow-to-finish, 105 ft. x 80 ft. x 13 ft. earthen manure storage - August 1993 (K. Smith, Ontario, Canada).  Storage was pumped out in October 1993 for fertigation.  Table 5.0 indicates retained fertilizer value of remediated liquid hog manure.

      Table 5.0 Nutrient value of liquid hog manure after
      3 months of remediation using the Little River Pond Mill^® circulator

      Nutrients	lbs./1000 gallons of liquid
      Nitrogen	13.4
      Phosphorus (P2O5)	2.6
      Potassium (K2O)	13.4

      The financial gain in nutrient value of the remediated hog manure, over the course of one year, was $1,657.24.