| abstract |
The invention provides a method for producing feed for piglets by cultivating microalgae in pig farm sewage, and relates to the field of breeding technology, comprising the following steps: (1) pre-cultured microalgae in the logarithmic growth phase with a concentration of 1-1.5g/L After the algae liquid is alkaline domesticated and treated, use sewage to expand cultivation; (2) After the pig farm sewage is precipitated, it is diluted, sterilized, and microalgae are inoculated into the sewage for cultivation; (3) The sewage containing microalgae is pumped into the algae collection bag with a water pump Medium filtration to obtain concentrated algae liquid, after fermentation, to obtain microalgae fermentation liquid; making piglet feed, the piglet feed of the present invention can greatly reduce the feeding cost of pig farms, and can reduce the feed coefficient, increase the growth rate of piglets, and reduce the mortality rate , In addition, during the breeding process of microalgae, it can purify sewage, reduce ammonia nitrogen content, total phosphorus content, and COD in sewage, and the purified sewage can be discharged directly, reducing the environmental protection pressure of pig farms. meet the requirements of sustainable development. |