Bioremediation of Polycyclic Aromatic Hydrocarbons in Contaminated Soils Using Vermicompost

Table 1

The physicochemical analysis of the vermicompost.

No.	Parameter	Standard limit		Results
		Class 1	Class 2
1	Organic matter	Min. 35%	Min. 25%	39%
2	Organic carbon	Min. 20%	Min. 10%	23%
3	Organic nitrogen	Min. 1%	Min. 0.5%	1.5%
4	C/N ratio	15–25	10–15	15.1
5	Potassium	Min. 1%	Min. 0.5%	2.3%
6	Electrical conductivity	Max. 8 ds/m	Max. 10 ds/m	2.35 ds/m
7	pH	6.5–8.5	6.5–8.5	7.78
8	Moisture	20–30	20–30	39
9	Ash	Max. 50%	Max. 50%	63
10	Sodium	—	—	1.2%
11	Saturation percentage	—	—	86
12	Percentage of neutralizing agents	—	—	19