Antartic krill oil is rich in astaxanthin and Omega-3 fatty acids such as EPA and DHA therefore can be used as highly profitable diet supplements. Recently soft capsules have been commonly used to contain oil-soluble health-care food, and the optimization of the formula for soft capsule shell is one of the key factors in the product development. In this study we measured the dissolution rate as a parameter to determine the optimal formula for the soft-gelatin capsule shell. We used tartrazine as the indicator and selected 424 nm as the absorption wavelength. We then established a linear regression equation between the concentration of tartrazine and its absorbance. The orthogonal method was employed to test four factors in the formula of soft capsule shell: the ratio of gelatin to glycerol, the ratio of water to gelatin, the percentage of sorbitol, and the percentage of fumaric acid. In each factor three levels were set up and tested. The dissolution rates of various soft-gelatin capsule shells were obtained according to the Noyes-Whitney equation. The results showed that the dissolution rate reached the maximum value when the ratio of water, glycerol and gelatin was 0.8 : 1 : 0.5 and the percentages of sorbitol and fumaric acid were 3% and 0.7% respectively. The verification test also revealed that the dissolution rate of this formula was very close to the maximum dissolution rate in the orthogonal experiment. Our optimized formula will provide important scientific data for the design of Antartic krill oil soft capsules and other oil-soluble soft capsules.

In order to prevent oil oxidation, the antioxidative activity of Vitamin E, rosemary extract and ascorbyl palmitate on Antartic krill oil were studied by the Schaal oven accelerated tests. The POV and Anisidine value were used as oil stability evaluation index. The results showed that the antioxidative acitivity of 3 000 mg/L Vitamin E was the best when considering Ansidine value as an evaluation index and the antioxidative acitivity of 3000 mg/L rosemary extract was the best when considering POV as an evaluation index. Considering the costs of antioxidants as well as the national standards for food additive, 3 000 mg/L Vitamin E was choosed as natural antioxidant of Antartic krill oil.

The krill?meal for krill oil needs to be produced as gentle as possible, to protect the biological active substances in the Antarctic krill oil. For the purpose of better production pattern, the effect of temperature and water content in the process of krill?meal production was studied and the optimal conditions were determined by energy consumption computation. The results showed that temperature slightly affected the acid value of krill oil when water content was lower than 10%;However, high temperature made serious lipid rancidity when water content was below 10%. But the higher operation temperature was, the faster drying speed was, the higher manufacture efficiency was, and the lower energy consumption was. Compared to 50℃, dry operation at 80℃made double production efficiency and reduced energy consumption by 25%. In order to protect active substances, phasic dry method was applied ( krill was dried to 15% moisture content under 80℃, then dried under 50 ℃) , instead of single temperature operation. The new way of krill?meal production made manufacture efficiency nearly doubled and energy consumption reduced by 24%.

A new production technology of krill-meal was simulated that krill was boiled , dehydrated and frozen on ship, and then krill was processed into krill-meal on land. Onshore simulated experiments showed that the boiled krill lost weight by 48.1%, and krill-meal yield was 13.6%by solvent treatment on land. The yield was similar to current technology. Krill oil was extracted from krill-meal made by new production technology. Acid value, protein content and ash content of the krill oil were 11.6, 5.25%and 3.83%, respectively. The results showed that quality of the krill oil was no difference between current production technology and the new one.

Disclosed is a method for extracting phospholipid-rich krill oil from Antarctic krill. The method includes using the Antarctic krill or Antarctic krill head shells as raw materials, subjecting the raw materials to pretreatment such as heating for enzyme-killing and sterilization and alkaline solution soaking, performing water removing, drying and smashing, using organic solvents to extract krill powders, performing filtering, subjecting separated extracting solutions to rotary evaporation, and removing the residual organic solvents to obtain the Antarctic krill oil with phospholipid contents over 40%. The method for extracting the phospholipid-rich krill oil from the Antarctic krill is simple in operating, the obtained phospholipid-rich krill oil is cheap, safe, environment-friendly, high in the phospholipid contents, low in acid values and good in liquidity, and the method is capable of improving stability of the phospholipid oil, improving qualities of the phospholipid oil and greatly improving comprehensive utilization rate of the Antarctic krill and can be used as a simple and practicable method for extracting oil and particularly the phospholipid-rich oil from the Antarctic krill.

When the global fishery resources is falling,most fishery variety are overfishing,Antarctic krill resources attract attention more and more.This article analyzed Antarctic krill fishing output changes,the developing situation and its trend.As the fishing output is increaseing,the processing technology is improving,the new products developing application is strengthening,the market is expanding.We are hopeful of the krill's developing prospect.