Biosolids Application Plan: Biosolids Testing
The biosolids are continually monitored at the Metro District's treatment facility. The parameters that are monitored are included in the table below: |
Biosolids Testing Parameters
|
Nutrients |
Metals* |
| Nitrate-Nitrogen |
Arsenic |
| Ammonia-Nitrogen |
Cadmium |
| Organic Nitrogen |
Copper |
| Total Kjeldahl Nitrogen |
Lead |
| Total Phosphorus |
Mercury |
| pH |
Molybdenum |
| Total Solids |
Nickel |
| Total Volatile Solids |
Selenium |
| |
Zinc |
* Total and Available Metals are analyzed
|
Because most of the nitrogen is bound within the organic matter of biosolids, a factor of 20 percent is used for calculating the amount of total nitrogen that will be available for the first year. Averaging 7.0 percent total nitrogen (dry weight basis), the available nitrogen is calculated as follows:
(2000 lbs. per dry ton) X (0.070 total N in biosolids) X (0.20 N availability) = 28 lbs. available N per dry ton biosolids
|
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