Method for breeding earthworm by using domestic sludge

Abstract

The invention discloses a method for breeding earthworms by using domestic sludge. The method is characterized by comprising the following steps: performing earlier stage treatment on sludge; preparing an earthworm medium bed and introducing earthworms; adding a mixed sludge material to the surface of the medium bed once every 5 or 7.5 days; spraying a palatability regulation liquid above the medium bed once after the first time of material addition; when the density of the earthworms is 3-4kg / m<2>, harvesting the earthworms, centrally luring grown earthworms once every 15 days, and expanding the bed when the mixed sludge material is 35-40cm high on the medium bed; taking off a high-density earthworm surface layer of 10-15cm thick on one side of the original medium bed and paving on a new medium bed by taking the central line as an axis; exposing the core of the original medium bed after bed expansion, uniformly taking out and piling at an appointed place, and finally resetting and turning over the original medium bed. The method is applicable to cold regions in north China, the problem that domestic sludge cannot be continuously treated because of the cold weather can be solved, the treatment efficiency can be improved, and the bed expansion speed is increased; the method is beneficial to long-term domestication of earthworms, and applicable to industrial large-scale domestic sludge treatment with earthworms.

Description

technical field [0001] The invention relates to a method for cultivating earthworms suitable for northern cold regions, in particular to a method for cultivating earthworms using domestic sludge. Background technique [0002] Conventional treatment methods such as incineration and landfill of domestic sludge cannot fundamentally solve the pollution problem. The calorific value of direct incineration of sludge is too low, and other secondary pollution such as harmful gas and dust pollution must be controlled; direct landfill of sludge is also There are problems of difficulty in compaction and natural fermentation, which directly affect the land reuse of landfill, and the sludge buried in the ground is also a potential threat to the environment. More importantly, most of the organic matter cannot be returned to the soil due to changes in the way organic waste is disposed of and farmers' fertilizer habits, disrupting the natural cycle of the land. Contents of the invention ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for cultivating earthworms using domestic sludge. This method is suitable for the northern cold regions, and can solve the problem that earthworms cannot process domestic sludge continuously due to cold, and realize that domestic sludge can be produced without fermentation. Direct biological treatment improves the treatment efficiency, increases the treatment speed and bed expansion speed of the earthworm bed; it is conducive to the long-term domestication of earthworms, and is suitable for the large-scale treatment of domestic sludge in the industrialization of earthworms

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