Method for preparing pig feed rich in DHA through schizochytrium limacinum fermentation waste liquid

Abstract

The invention discloses a method for preparing a DHA-containing pig feed through schizochytrium limacinum fermentation waste liquid. The method comprises the following steps: regulating the pH value of the schizochytrium limacinum fermentation waste liquid to be 6.5-7.5, and regulating the temperature to be 30-40 DEG C; according to a formula, crushing a pig feed comprising 55-75% of corn, 8-15% of wheat bran, 10-20% of soybean meal, 3-9% of rapeseed meal, 0.5-1.0% of calcium hydrophosphate, 0.8-1.3% of stone powder and 0.05-0.2% of L-lysine according to weight percentage, and mixing to obtain mixed powder; adding the pre-processed schizochytrium limacinum fermentation waste liquid into the mixed powder, stirring for 0.5-2 hours to obtain the DHA-containing pig feed, wherein the adding amount of the pre-processed schizochytrium limacinum fermentation waste liquid into each ton of the mixed powder is 10-30% v/w of the fed materials. According the method, the pig feed rich in DHA is produced through the schizochytrium limacinum fermentation waste liquid, so that a pollution problem caused by waste liquid discharge is solved, and the purpose of water conservation is realized.

Description

technical field [0001] The invention relates to a method for producing pig feed rich in DHA, in particular to a method for producing pig feed rich in DHA by utilizing the fermentation waste liquid of Schizochytrium fungus. Background technique [0002] The rapid development of the fermentation industry not only drives the development of related industries, but also plays an important role in saving food, increasing food varieties, and improving product quality. The fermentation industry involves a wide range of fields, including winemaking, alcohol, organic acids, amino acids, antibiotics, etc.; and many of the commonly used fermentation raw materials such as glucose, acetic acid, paraffin, starch, molasses, and yeast powder also need to be obtained through fermentation. With the vigorous development of the fermentation industry, the environmental protection, green and sustainable treatment of fermentation waste liquid has become increasingly prominent. In recent years, the...

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Problems solved by technology

[0004] Based on the high added value and huge market demand of docosahexaenoic acid products, the production of docosahexaenoic acid by Schizochytrium fermentation has become a hot spot in the field of microbial fermentation, which has led many domestic fermentation companies and colleges to start Research on the production of docosahexaenoic acid by Schizochytrium fermentation. At present, the main research direction is how to increase the biomass and increase the content of oil and docosahexaenoic acid. However, for the fermentation waste liquid after oil extraction Green and sustainable post-processing has received less attention. At the same time, because the fermentation waste liquid contains a large amount of high-value complex components such as amino acids, this will inevitably leave hidden dangers for the development of enterprises and society. Green and low-cost recycling of Schizochytrium fermentation waste liquid Disposal is a major problem that the industry needs to solve urgently