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A method of using earthworms to treat domestic sludge
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A domestic sludge and earthworm technology, applied in the direction of microbial treatment, combined biological treatment, sewage/sludge fertilizer, etc., can solve the problems of sludge treatment efficiency decline, sludge limitation, etc., to reduce heavy metal content, increase thickness, The effect of high fertilizer efficiency
Active Publication Date: 2022-04-29
冯良山
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However, since earthworms need to treat sludge under aerobic conditions, at present, when using earthworms to treat domestic sludge, it is necessary to control the thickness of the sludge within 15 cm, which limits the amount of sludge treated each time , the efficiency of sludge treatment is greatly reduced
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Embodiment 1
[0030] (1) According to the weight ratio of 100:0.5, add wormwood to domestic sludge and mix uniformly to obtain material A; adjust its water content to 70wt%, lay it on the vibrating table, and lay the thickness of 30cm. Put 10,000 earthworm seedlings into material A to treat the sludge. The earthworm seedlings are composed of Taiping No. 2 and Chizi Aisheng with a quantity ratio of 1:1. During the treatment, the vibrating table is intermittently vibrated at a frequency of 15Hz, vibrate for 0.5h every 2h, keep the temperature at 20°C during the treatment process, and control the moisture content of the sludge at 70wt%;
[0031] (2) After 10 days, trap and collect earthworms with dry cow dung, add straw to the material B obtained by earthworm treatment with a weight ratio of 20:3, then add urea, adjust the carbon-nitrogen ratio to 25, and then add Bacillus natto, Cellulolytic bacteria, Bacillus megaterium, saccharomyces and Bacillus licheniformis are prepared according to the ...
Embodiment 2
[0034] (1) Add wormwood to domestic sludge according to the weight ratio of 100:0.5 and mix it uniformly to obtain material A; adjust its moisture content to 65wt%, lay it on a vibrating table, and lay it with a thickness of 25cm, and then add it to each ton of material In A, put 8000 earthworm seedlings to treat the sludge. The earthworm seedlings are composed of Taiping No. 2 and Chizi Aisheng with a quantity ratio of 2:1. During the treatment, the vibration table is intermittently vibrated with a vibration frequency of 10Hz. , vibrate for 0.5h every 3h, keep the temperature at 25°C during the treatment process, and control the moisture content of the sludge at 65wt%;
[0035] (2) After 15 days, trap and collect earthworms with dry cow dung, add straw to the material B obtained by earthworm treatment with a weight ratio of 5:1, then add urea, adjust the carbon-nitrogen ratio to 20, and then add Bacillus natto, Cellulolytic bacteria, Bacillus megaterium, saccharomyces and Bac...
Embodiment 3
[0038] With embodiment 1, the difference is that the earthworm in the step (1) is replaced by a separate Taiping No. 2.
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Abstract
The invention discloses a method for treating domestic sludge by using earthworms, which belongs to the technical field of sludge treatment. The method comprises the following steps: adding wormwood to domestic sludge to obtain material A, and then putting in earthworm seedlings and performing vibration treatment After the treatment is completed, the earthworms are trapped and collected, and straw and fermented bacteria are added to the material B obtained from the earthworm treatment for fermentation; the present invention maintains the freshness of the biological sludge by adding wormwood, improves the efficiency of earthworm treatment, and then carries out Fermentation treatment enables the components in the domestic sludge to be fully decomposed; the present invention adds vibration treatment during the fermentation treatment to incorporate more oxygen into the sludge, thereby increasing the thickness of the sludge in a single treatment and improving sludge treatment. Efficiency: After the domestic sludge is treated by the method of the present invention, it meets the standards of organic fertilizer or bio-organic fertilizer, and can be directly used as organic fertilizer or bio-organic fertilizer, and has high fertilizer efficiency, which can significantly increase crop yield.
Description
technical field [0001] The invention belongs to the technical field of sludge treatment, and in particular relates to a method for treating domestic sludge by using earthworms. Background technique [0002] With the improvement of urbanization and the expansion of city scale, the output of urban domestic sludge is also increasing. The composition of urban domestic sludge is complex, containing a large amount of organic matter and pathogenic bacteria. In addition, it is also rich in N, P, K and Heavy metal elements, if not effectively treated, will cause serious harm to water bodies, soil, etc., and will also indirectly affect people's health. [0003] The treatment of domestic sludge by means of incineration, landfill, etc. is not only extremely costly, but also cannot fundamentally solve the pollution problem, and it is easy to cause secondary pollution to the environment, such as the heat generated by direct incineration of sludge. If the value is too low, it is necessary...
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