Bioremediation Calculator

Calculate nutrient dosing for enhanced bioremediation using the C:N:P ratio of 100:10:1.

Treatment area length (m)

Treatment area width (m)

Treatment depth (m)

Soil bulk density (t/m³)

Contaminant concentration (mg/kg)

Carbon fraction of contaminant

N fertilizer grade (%N)

P fertilizer grade (%P)

Tab to move between fields

Contaminant mass (kg)

900

Nitrogen required (kg N)

N fertilizer product (kg)

156.52

Soil volume (m³)1,200

Soil mass (tonnes)1,800

Phosphorus required (kg P)7.2

P fertilizer product (kg)36

N fertilizer rate (kg/m²)0.26

P fertilizer rate (kg/m²)0.06

How to Use This Calculator

Enter the treatment area dimensions (length, width, depth in meters) to define the contaminated zone.
Set the soil bulk density (default 1.5 t/m³) and contaminant concentration in mg/kg.
Enter the carbon fraction of your contaminant (diesel ~0.87, PAHs ~0.9) to size nutrient demand.
Input your fertilizer grades (%N and %P) to convert nutrient needs into product quantities.
Review soil volume, contaminant mass, and fertilizer application rates (kg/m²) to plan amendments.

How the result changes with Treatment area length (m)

Treatment area length (m)	Contaminant mass (kg)	Nitrogen required (kg N)	N fertilizer product (kg)
1,000	30,000	2,400	5,217.39
3,500	105,000	8,400	18,260.87
6,500	195,000	15,600	33,913.04
9,000	270,000	21,600	46,956.52

Treatment area length (m): Length of the contaminated zone in meters.
Treatment area width (m): Width of the contaminated zone in meters.
Treatment depth (m): Depth of contaminated soil to be treated.
Soil bulk density (t/m³): Dry bulk density of soil. Sand ~1.6, clay ~1.3, loam ~1.4 t/m³.
Contaminant concentration (mg/kg): Average contaminant concentration in soil (ppm).
Carbon fraction of contaminant: Fraction of the contaminant mass that is carbon. Diesel ~0.87, benzene ~0.92, PAHs ~0.9.
N fertilizer grade (%N): Nitrogen content of fertilizer product. Urea = 46%, ammonium nitrate = 34%.
P fertilizer grade (%P): Phosphorus content of fertilizer product. Triple superphosphate ~ 20% P.

Soil volume (m³): Total volume of soil in the treatment zone.
Soil mass (tonnes): Total mass of soil to be treated.
Contaminant mass (kg): Total mass of contaminant in the treatment zone.
Nitrogen required (kg N): Elemental nitrogen needed based on C:N = 10:1 ratio.
Phosphorus required (kg P): Elemental phosphorus needed based on C:P = 100:1 ratio.
N fertilizer product (kg): Mass of nitrogen fertilizer product to purchase.
P fertilizer product (kg): Mass of phosphorus fertilizer product to purchase.
N fertilizer rate (kg/m²): Nitrogen fertilizer application rate per square meter of treatment area.
P fertilizer rate (kg/m²): Phosphorus fertilizer application rate per square meter.

Identify Input Parameters
4 parameters
Treatment area length (m) = 30, Treatment area width (m) = 20, Treatment depth (m) = 2, Soil bulk density (t/m³) = 1.5 = 8 input(s) provided
Calculate Contaminant mass
Contaminant mass = soilMass * contaminantConc * 1e-3
900 = 900
Calculate Nitrogen required
Nitrogen required = carbonMass * 0.1
72 = 72
Calculate N fertilizer product
N fertilizer product = nitrogenRequired / (nFertilizerPct / 100)
156.52 = 156.52
Calculate Soil volume
Soil volume = length * width * depth
1200 = 1200
Calculate Soil mass
Soil mass = soilVolume * bulkDensity
1800 = 1800