TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preferred Method: In obtaining triglyceride-rich microbial biomass, the carbon source is a lignocellulosic biomass hydrolysate. The carbon source further comprises glycerol. The hydrolysate is obtained from wheat straw, sugarcane bagasse, bagasse, corn oil palm empty fruit bunches, pruning oil palm oil palm fiber pruning vine, olive tree pruning and its combinations. Carbon source is selected from glucose, glycerol, molasses, xylose, arabinose, mannose, fructose, acetate and its combinations, preferably glucose or xylose. The nitrogen source is selected from yeast extract, peptone, corn steep liquid, urea, sodium glutamate, various inorganic nitrogen sources such as ammonium salts and its combinations. It is an ammonium salt, preferably ammonium chloride. The solid medium comprises inhibitor selected from acetic acid, formic acid, levulinic acid, coumaric acid, ferulic acid, succinic acid, 4-hydroxybenzaldehyde, vanillin, vanillic acid, syringaldehyde, 4-hydroxybenzoic acid, catechol, guaicol, syringic acid, furfural, 5-hydroxymethylfurfural and its combinations. The conditions suitable for growth of the microorganism of step (i) comprises: temperature in the range between 18 degrees C and 37 degrees C, dissolved oxygen concentration of at least 20%, and/or constant stirring. Step (ii) is performed by a method selected from filtration, microfiltration, centrifugation and its combinations. The method further comprises drying the microbial biomass from step (ii). In obtaining composition enriched in lipids, the extraction of step (ii) is carried out by mechanical method or by a method of solid-liquid extraction. Extraction method is performed using mechanical screw press, French press or ball mill. The method of solid-liquid extraction is performed using a water immiscible organic solvent. The water immiscible organic solvent is selected from n-hexane, acetone, petroleum ether, ethyl ether and its combinations. In obtaining paraffins, step (ii) is performed by at least one wash with sodium hydroxide (NaOH) at a concentration between 5% and 15%. Step (iii) comprises a hydroprocessing or hydrotreating process. The method comprises hydrotreating; contacting the refined mixture of lipids obtained in step (ii) with water; applying an elevated temperature and pressure; and separating the organic phase from the water. It comprises hydroprocessing; hydrogenating the refined mixture of lipids obtained in step (ii); and refined deoxygenating lipids. Hydrogenation or deoxygenation of the mixture of lipids is carried out in the same step or in consecutive steps. The method comprises performed hydroprocessing at elevated temperature and pressure. It further comprises a catalytic cracking process under suitable conditions to convert paraffins obtained in step (ii) into biokerosene. Catalytic cracking employs a solid catalyst. EXAMPLE - No suitable example given.