NOVELTY - Biodiesel is prepared through microwave heating using wet algal biomass by filtering or centrifuging microalgae liquid, removing water, transferring wet algal biomass to centrifuge tube, adding chloroform and methanol, homogenizing, placing tube in microwave digestion tank, adding concentrated sulfuric acid, sealing, microwave treating, cooling, transferring algae liquid in collecting container, rinsing tank twice with chloroform, adding chloroform, centrifuging, removing lower phase, adding deionized water, dissolving residue with methanol, glycerol, and water, and centrifuging.    USE - Preparation of biodiesel through microwave heating using wet algal biomass (claimed).    ADVANTAGE - The preparation of biodiesel is simple and has high oil diffusion speed.    DETAILED DESCRIPTION - Biodiesel is prepared through microwave heating using wet algal biomass by filtering or centrifuging microalgae liquid, removing water to obtain wet algal biomass with 40-90% solid content, transferring 1-100 g wet algal biomass to centrifuge tube, adding 4-100 ml chloroform and 4-100 ml methanol, homogenizing by vibration for 20-40 s, placing tube in microwave digestion tank, adding 0.2-5 ml 98% concentrated sulfuric acid, sealing, microwave treating at 500-1000 W power for 40-80 s until temperature reaches 60-90 degrees C, reducing microwave power to 400-600 W, maintaining temperature for 2-0 minutes, cooling microwave digestion tank to 25-30 degrees C, transferring algae liquid in collecting container, rinsing tank twice with 4-100 ml chloroform, pouring liquid to collecting container, adding 15-300 ml chloroform, centrifuging at 4000 r/minute for 5 minutes until layer forms i.e. lower oil phase, middle algae residue, and upper aqueous phase, removing lower phase, adding 10-200 ml deionized water to collecting container, dissolving residue with methanol, glycerol, and water, centrifuging at 4000 r/minute for 5 minutes, extracting lower oil phase, oven drying oil phase in chloroform to obtain bio-oil, weighing, transferring to glass container, adding 1-100 ml n-hexane, standing for 30 minutes, removing upper layer, disposing lower layer, dissolving upper layer in hexane, recovering hexane at 50-70 degrees C, and collecting remaining oil phase.    DESCRIPTION OF DRAWING(S) - The drawing shows a flow chart of preparation of biodiesel through microwave heating using wet algal biomass. (Drawing includes non-English language text).