Pit Manure additives study results
By Purdue University - Thirty-five manure storage pit additive products were evaluated by the Purdue University Agricultural Air Quality Laboratory in an experiment supported by the National Pork Board. Vendors voluntarily submitted their products to a well-defined evaluation protocol.
Each product was tested three times (42 days each replicate) in an enclosed 15-inch diameter by 48-
inch tall manure storage reactor. Product effectiveness was determined by comparing odor,
hydrogen sulfide, and ammonia measurements in treated reactors against measurements in
untreated reactors.
Manure characteristics were evaluated at the beginning and end of each trial. Each product summary includes a manufacturer/marketer product description, the method and rate of application of these products to the manure storage pits, any unique application instructions needed to calculate the amount of product to be applied, and the current retail price.
The product tables list parameters measured in the manure or the airspace (headspace) above the manure surface. The table heading of least squares mean and standard error is the statistical average of the three replicate measurements.
The graphs shown for each product represent odor dilution threshold (ODT) and hydrogen sulfide (H2S). ODT, the best measure of odor, was measured on four (4) separate days during each replicate. H2S was measured several times a day throughout the 42-day replicates. Each graph displays the product’s ODT or H2S value difference from the untreated manure value for each of the three replicates. The x-axis of the graph represents the day of sampling.
Each line on the graph represents the difference between treated and untreated manure in the corresponding replicate of testing. The y-axis provides the measure of difference, calculated as treated concentration minus untreated concentration. A negative value indicates a decrease in concentration from the untreated reactor levels. A positive value indicates an increase in concentration above untreated reactor levels.
Statistical analysis provides measures of probability of differences in product activity. The comparison of interest is between untreated manure reactors and the product reactors. While scientists regularly use a 95% probability of success to declare product activity, many producers would be willing to make a decision from 75% probability of success.
Results are reported at both levels of certainty, 95% and 75%. Each product summary table lists the degree of certainty and in what direction (increase or decrease) the treated manure was different from the untreated manure. Also presented is the percent (%) change in product response compared to the control. Listed below are those products that were found to have either a 95% or 75% level of certainty that odor dilution threshold, hydrogen sulfide and ammonia would be decreased under these testing procedures as a result of the product treatment.
75% Certainty of Decrease
75% Certainty of Decrease
To view the whole 197 page pdf report Click Here
Source: US National Pork Board - January 2001
Manure characteristics were evaluated at the beginning and end of each trial. Each product summary includes a manufacturer/marketer product description, the method and rate of application of these products to the manure storage pits, any unique application instructions needed to calculate the amount of product to be applied, and the current retail price.
The product tables list parameters measured in the manure or the airspace (headspace) above the manure surface. The table heading of least squares mean and standard error is the statistical average of the three replicate measurements.
The graphs shown for each product represent odor dilution threshold (ODT) and hydrogen sulfide (H2S). ODT, the best measure of odor, was measured on four (4) separate days during each replicate. H2S was measured several times a day throughout the 42-day replicates. Each graph displays the product’s ODT or H2S value difference from the untreated manure value for each of the three replicates. The x-axis of the graph represents the day of sampling.
Each line on the graph represents the difference between treated and untreated manure in the corresponding replicate of testing. The y-axis provides the measure of difference, calculated as treated concentration minus untreated concentration. A negative value indicates a decrease in concentration from the untreated reactor levels. A positive value indicates an increase in concentration above untreated reactor levels.
Statistical analysis provides measures of probability of differences in product activity. The comparison of interest is between untreated manure reactors and the product reactors. While scientists regularly use a 95% probability of success to declare product activity, many producers would be willing to make a decision from 75% probability of success.
Results are reported at both levels of certainty, 95% and 75%. Each product summary table lists the degree of certainty and in what direction (increase or decrease) the treated manure was different from the untreated manure. Also presented is the percent (%) change in product response compared to the control. Listed below are those products that were found to have either a 95% or 75% level of certainty that odor dilution threshold, hydrogen sulfide and ammonia would be decreased under these testing procedures as a result of the product treatment.
Odor Dilution Threshold
95% Certainty of Decrease- None of the products tested decreased odor dilution threshold at this level of certainty.
Alken Clear-Flo® | see page 43 |
Biological Manure Treatment (BMT) | see page 55 |
Super Microbial Odor Control (SMOC) | see page 155 |
Zymplex. | see page 167 |
Headspace Hydrogen Sulfide Concentration
95% Certainty of DecreaseAlken Clear-Flo® | see page 43 |
Biocharge Dry | see page 51 |
GT-2000OC & BC-2000AF | see page 75 |
INHIBODOR® | see page 79 |
Roebic Odor Eliminator (ROE) | see page 143 |
Super Microbial Odor Control (SMOC) | see page 155 |
Zymplex | see page 167 |
MBA-S | see page 99 |
PS1 | see page 135 |
UC-40™ Microbe Formula | see page 159 |
Headspace Ammonia Concentration
95% Certainty of DecreaseAgriKlenz Plus | see page 39 |
AWL-80 | see page 47 |
Biocharge Dry | see page 51 |
Biological Manure Treatment (BMT) | see page 55 |
EM Waste Treatment | see page 71 |
Krystal Air™ | see page 87 |
Manure Management Plus ™ | see page 95 |
Peroxy Odor Control | see page 127 |
Agricycle™ & Microcycle™ | see page 35 |
Digest 54 Plus | see page 67 |
MBA-S | see page 99 |
N-P 50 | see page 119 |
This table shows the degree of certainty that products were successful in decreasing odor, H2S, and NH3 during Testing. |
|||||||
Product Name | Decreases Odor (ODT) |
Decreases Hydrogen Sulphide H2S |
Decreases Ammonia NH3 |
see page |
|||
Decrease |
Certainty |
Decrease |
Certainty |
Decrease |
Certainty |
||
Agri-Clean | 31 |
||||||
Agricycle™ |
|
3% |
75% |
35 |
|||
AgriKlenz Plus | 6% |
95% |
39 |
||||
Alken Clear-Flo® | 27% |
75% |
47% |
95% |
43 |
||
AWL-80 |
|
10% |
95% |
47 |
|||
Biocharge Dry | 37% |
95% |
7% |
95% |
51 |
||
Biological Manure Treatment | 25% |
75% |
5% |
95% |
55 |
||
BIO-MAX Biosystem | 59 |
||||||
Conserve-N | 63 |
||||||
Digest 54 Plus | 2% |
75% |
67 |
||||
EM Waste Treatment | 15% |
95% |
71 |
||||
GT-1000OC & BC-2000AF | 34% |
95% |
|
|
75 |
||
INHIBODOR® | 36% |
95% |
|
|
79 |
||
KOPROS® | 83 |
||||||
Krystal Air™ | 7% |
95% |
87 |
||||
Lagoon Aid | 91 |
||||||
Manure Management Plus™ | 6% |
95% |
95 |
||||
MBA-S | 19% |
75% |
3% |
75% |
99 |
||
MICROBE-LIFT | 103 |
||||||
MUNOX® | 107 |
||||||
M2 Acid Buffer | 111 |
||||||
Nature’s Key Pit & Lagoon Treatment™ | 115 |
||||||
N-P 50 | 3% |
75% |
119 |
||||
OdorKlenz BMT |
123 |
||||||
Peroxy Odor Control | 3% |
95% |
127 |
||||
Pit Remedy | 131 |
||||||
PS1 | 14% |
75% |
135 |
||||
Roebic Manure Liquefier | 139 |
||||||
Roebic Odor Eliminator |
|
23% |
95% |
|
|
143 |
|
SEPTI-SOL | 147 |
||||||
Solmar AW-509 | 151 |
||||||
Super Microbial Odor Control (SMOC) | 32% |
75% |
37% |
95% |
|
|
155 |
UC-40™ Microbe Formula | 15% |
75% |
|
|
159 |
||
X12 |
|
|
|
|
163 |
||
Zymplex | 28% |
75% |
27% |
95% |
|
|
167 |
To view the whole 197 page pdf report Click Here
Source: US National Pork Board - January 2001