1. Fermentation process
Firstly, the cow dung should be dried or dried to control its moisture below 85%. Then, the proportion of straw added is 7:3, so that the carbon ratio of raw materials (cow dung) and auxiliary materials (straw powder) can be controlled between 23 and 28, and the moisture content can be controlled between 52% and 68%. Finally, the organic fertilizer fermentation maturing agent was added. It can also build a fermentation tank 50 meters long and 4 meters wide, and can build many tanks. The mixtures were stacked flat in the fermentation tank, and then turned by the organic compost machine. The turning depth could reach 0.7 m~1 M. The mechanical dump is even and thorough, and the low-level special materials are dumped into the middle and upper parts of the dump, so as to fully decompose. After the first pile-up, the pile-up will be done every day. However, when the temperature exceeds 70 degrees, it must be turned over immediately, otherwise beneficial microorganisms and fermentation bacteria will be massively killed, which is not conducive to fermentation maturation.