Method for treating urban domestic sludge by using earthworms

A technology of urban domestic sludge and earthworms, which is applied in the fields of energy and wastewater treatment, biological sludge treatment, and application to achieve the effect of preventing secondary pollution and low cost.

Inactive Publication Date: 2011-08-17
刘波
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Problems solved by technology

However, a large amount of sludge produced by sewage treatment plants is extremely difficult to treat due to the large amount of pollutants and heavy metals contained in the sludge
With the current treatment technology, such as landfill, dry conversion treatment, etc., not only the treatment cost is extremely high, but also it is easy to cause secondary pollution to the environment and affect people's health

Method used

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  • Method for treating urban domestic sludge by using earthworms
  • Method for treating urban domestic sludge by using earthworms
  • Method for treating urban domestic sludge by using earthworms

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Embodiment Construction

[0020] The method for utilizing earthworms to treat urban domestic sludge comprises the following steps:

[0021] see figure 1 , first place an earthworm production tray 101 at the sludge outlet of the sewage treatment plant, and collect the sludge into the earthworm production tray 101. The earthworm production tray 101 is an opaque plastic tray with a length of 1 meter, a width of 1 meter, and a height of 0.2 meters. Two concave draw-in grooves 102 are provided at the bottom of the earthworm production tray 101, which are convenient for transportation machinery, such as forklifts, etc. When the earthworm production tray 101 is transported, it is clamped to prevent the earthworm production tray 101 from falling.

[0022] Then, put 5,000 to 20,000 special-purpose earthworms for sludge treatment in each earthworm production tray 101. The special-purpose earthworms can be mixed with various types of earthworms from different regions for hybridization, and then a large and live...

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Abstract

The invention provides a method for treating urban domestic sludge by using earthworms. The method comprises the following steps of: collecting the sludge to earthworm production trays; putting the earthworms on the sludge surfaces in the earthworm production trays; conveying the earthworm production trays to a production plant, and stacking the earthworm production trays on a tray rack; placing the earthworm production trays in the production plant for 1 to 2 days; putting dry cow dung into the earthworm production trays, and performing trapping collection on the earthworms; and transferring the mixture of the earthworm excretion and the cow dung to a solar drying shed, and drying the mixture. After the urban sludge is converted into the earthworm excretion by using the earthworms, the earthworm excretion can be used as the nutrient soil of parks or the garbage coverage soil of garbage landfills, so that the method is environmentally-friendly, has low cost and is beneficial to solution to the worldwide problem of difficulty in treating the urban domestic sludge.

Description

technical field [0001] The invention relates to the technical field of urban domestic sludge treatment, in particular to a method for treating urban domestic sludge by using earthworms. Background technique [0002] With the development of cities, a large amount of water resources are consumed and polluted. Now, China has built a large number of urban sewage treatment plants to treat the polluted water resources. However, a large amount of sludge produced by sewage treatment plants is extremely difficult to treat due to the large amount of pollutants and heavy metals contained in the sludge. With the current treatment technology, such as landfill, dry conversion treatment, etc., not only the treatment cost is extremely high, but also it is easy to cause secondary pollution to the environment and affect people's health. Contents of the invention [0003] Aiming at the deficiencies and defects of the above prior art, the object of the present invention is to provide a me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/02C05F3/00
CPCY02A40/20Y02W10/37
Inventor 刘波
Owner 刘波
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