Extraction of Municipal Sewage Sludge Lipids Using Supercritical CO₂ for Biodiesel Production: Mathematical and Kinetics Modeling

Table 5

Comparison of the physicochemical properties of sewage sludge biodiesel with other biodiesel obtained from edible and nonedible Feedstock.

Biodiesel	Density at 15℃ (kg/m^3)	Viscosity at 40℃ (mm^2/s)	Acid value mg (KOH/g)	Cloud point (℃)	Pour point (℃)	Heating value (MJ/Kg)	Flashpoint (℃)	Iodine number g I2/100 g	Cetane number	Reference
Palm	880	4.52	0.25	14.25	14.33	34.41	175	50.5		[34]
Soybean	883	6.75	0.11	N/A	−7.0	N/A	120	N/A	54.60	[35]
Sunflower	860	4.72	0.07	4.0	−5.0	N/A	183	N/A	N/A	[36]
Canola	852	4.74	0.56	—	—	—	217	N/A	N/A	[37]
Jatropha curcas L.	867	4.01	0.04	N/A	N/A	36.66	165	N/A	40.01	[38]
Animal fat	870	4.82	0.07	N/A	−2.0	N/A	149	77.7	N/A	[39]
Waste cooking oil	876	3.66	N/A	N/A	N/A	39.76	160	N/A	63.88	[34]
Algae	872	5.82	0.40	N/A	−16	40.80	N/A	N/A	50.54	[40]
Chicken fat	875	4.60	0.43	2.0	−5.0	N/A	168	N/A	N/A	[41]
Jojoba	868	24.84	0.71	N/A	N/A	46.47	285	50.2	58.25	[21]
MSS	875	4.10	0.50	−2.5	−10.50	39.64	140	75.9	N/A	Present study

N/A: not available.