Device and method for passivating heavy metals by fermenting and composting field livestock and poultry breeding wastes in cold regions

Abstract

The invention discloses a device and a method for passivating heavy metals by fermenting and composting livestock and poultry breeding wastes in a cold region, and aims to solve the problems of difficulty in field aerobic composting temperature rise, incapability of passivating heavy metals, high cost and the like in a cold region low-temperature condition. In the device, the diameter of an upperopening of a fermenter is larger than that of a lower opening, the height of the fermenter is 1 m, round holes are formed in the wall of the fermenter, an upper round plate and a lower round plate arearranged at the upper end opening and the lower end opening of the fermenter respectively and connected with the fermenter through iron wires, and the upper round plate is covered with a cover plate.The method comprises the following steps: 1, digging a fermentation port; 2, digging a fuel channel and a smoke outlet channel; 3, excavating a lower combustion port and an upper combustion port; 4,excavating a lower flue and an upper flue; 5, placing a fermentation barrel; 6, heating the lower surface of the fermentation barrel; 7, adding livestock and poultry manure and crushed straw; 8, heating the upper surface of the fermentation barrel; and 9, stabilizing heavy metals in the livestock and poultry breeding wastes by using biomass carbon. The device and method are used for field composting.

Description

technical field [0001] The invention relates to the field of organic waste treatment, in particular to a heavy metal passivation device and method for fermenting and composting field livestock and poultry breeding waste in cold regions. Background technique [0002] Under low temperature conditions in cold regions, it is difficult to start the temperature of aerobic composting in the field, and the heavy metals added to livestock and poultry farming waste are highly active. If the heavy metals are not passivated, the quality of crops will be affected and human health will be threatened. In order to achieve the above functions, the traditional method is to produce biomass carbon indoors to stabilize heavy metals; indoors through warming facilities or thermal insulation design, artificially add some low-temperature fermentation bacteria agents to achieve the temperature of compost. These undoubtedly increase the processing cost, which is not conducive to the harmless applicati...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a device and method for fermenting and composting heavy metal passivation of field livestock and poultry breeding waste in cold areas in order to solve the problems of difficulty in warming up aerobic composting in the field under low temperature conditions in cold areas, inability to passivate heavy metals, and high cost

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