Biodegradation of Used Motor Oil in Soil Using Organic Waste Amendments

Table 1

Physicochemical properties of soil and organic wastes used for bioremediation.

Parameter	Soil	Organic wastes
		BSG	BS	SMC
pH	6.12±0.23	6.66±0.49	7.04±0.29	5.64±0.25
Nitrogen (%)	0.4±0.02	1.02±0.1	0.4±0.01	0.5±0.03
Phosphorus (mg/kg)	21.8±1.5	20.6±2.0	21.2±1.4	22.5±1.8
Organic C (%)	10.3±1.1	10.9±0.91	10.5±1.3	10.2±1.1
Moisture (%)	7.0±0.3	71.84±3.5	38.5±2.86	62.3±4.12
Sand (%)	37.5±2.6	—	—	—
Silt (%)	18.75±1.95	—	—	—
Clay (%)	43.75±2.75	—	—	—
HUB (CFU/g)	6.2×10^3	7.4×10^2	2.1×10^2	4.5×10^2
Texture	Clayey	—	—	—

BSG: Brewery spent grain, BS: banana skin, SMC: spent mushroom compost, HUB: hydrocarbon utilizing bacteria.