The invention discloses a method for mixing and composting sheep
manure and corn straws, which comprises the following steps:
raw material preparation, filler addition,
moisture adjustment, inoculant
inoculation, composting
fermentation, post-treatment and the like, in the filler addition process,
biochar is modified to prepare a slow-release
fertilizer,
zeolite is added into different
layers of a
fermentation product for multiple times, and the
fermentation product is uniformly mixed with the
zeolite. In the preparation process of the hydrothermal carbonized
biochar, attapulgite loaded with
nutrient elements is added. According to the method, peculiar smell and
ammonia gas emission in the initial stage of composting can be controlled by utilizing the adsorption characteristic of
zeolite in different fermentation stages in the composting process, and the situation that the fermentation starting speed is affected due to insufficient available nutrients of microorganisms caused by adsorption of excessive zeolite is also avoided; meanwhile, attapulgite loaded with
nutrient elements is added in the preparation process of the hydrothermal carbonized
biochar, so that pores of the biochar can be filled, physical support is provided for pore walls of the biochar in the high-temperature and high-pressure
hydrothermal reaction process, and the pores are prevented from collapsing under the action of pressure and temperature.