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Method for treating domestic sludge by using earthworms

A technology of domestic sludge and earthworms, which is applied in the direction of oxidation treatment of sludge, special treatment targets, biological sludge treatment, etc., can solve the problems of difficult treatment, great impact on human health, small treatment volume, etc., and achieve the ability to improve soil , Realize the effect of reusing resources and reducing damage and harm

Inactive Publication Date: 2018-04-06
吴名根
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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, 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
[0003] At present, the sludge treatment methods mainly include: 1. Landfill. Although this method is low in cost, it will cause great pollution to the surrounding ecological environment and groundwater sources.
2. Incineration, because the dioxins produced during the incineration process are easily leaked from the incineration equipment, which has a great impact on human health, and requires high equipment investment and daily maintenance costs
3. High-temperature aerobic composting. The natural fermentation time of sludge high-temperature aerobic composting is usually 20 to 30 days. It takes a long time and the transformation is slow. It will generate a lot of odor, which will have a great impact on the surrounding environment. The treatment capacity is small and cannot be reduced. Heavy Metals in Sludge
However, earthworm sludge treatment technology has not yet been applied on a large scale, and some key issues have not been resolved, such as sludge acceptance requirements, sludge pretreatment, parameter control during sludge disposal, product utilization, and establishment of pollution prevention and control systems etc. A complete set of disposal system has not yet been formed; at the same time, there is a lack of engineering examples of using earthworms to treat sludge, so more in-depth research is needed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment takes the treatment of one ton of sludge as an example.

[0029] Step 1. Add 200 kg of traditional Chinese medicine dregs, 180 kg of beer dregs, 400 g of potassium permanganate and 500 g of deodorant to one ton of sludge, and then perform preliminary mixing, then add 700 g of EM bacteria to obtain a mixed base material, and pass it through a mixer The mixed base material is mixed evenly, and the mixed base material is left to stand at room temperature for 24 hours at 10°C for 24 hours to obtain the fermented base material through natural fermentation; during the fermentation process, the waste gas generated is deodorized by the waste gas recovery treatment device.

[0030] Step 2, laying an earthworm bed with a fermented base material, the thickness of the earthworm bed is 8cm. The earthworm seeds are placed on the edge of the earthworm bed, and the earthworms climb into the earthworm bed, and the earthworms are cultivated in the earthworm bed.

[0031]...

Embodiment 2

[0033] In this embodiment, the treatment of ten tons of sludge is taken as an example.

[0034] Step 1. Add 3000 kg of traditional Chinese medicine residue, 2000 kg of white wine residue, 5.5 kg of potassium permanganate and 7 kg of deodorant to ten tons of sludge, and then perform preliminary mixing, then add 10 kg of EM bacteria to obtain a mixed base material, and pass it through a mixer The mixed base material is mixed evenly, and the mixed base material is left to stand at room temperature for 24 hours at 8°C for 24 hours to obtain the fermented base material through natural fermentation; during the fermentation process, the waste gas generated is deodorized by the waste gas recovery treatment device.

[0035] Step 2, laying an earthworm bed with a fermented base material, the thickness of the earthworm bed is 5 cm. The earthworm seeds are placed on the edge of the earthworm bed, and the earthworms climb into the earthworm bed, and the earthworms are cultivated in the ear...

Embodiment 3

[0038] This embodiment takes the treatment of one ton of sludge as an example.

[0039] Step 1. Add 250 kg of traditional Chinese medicine dregs, 170 kg of wine dregs and beer dregs, 500 g of potassium permanganate, and 400 g of deodorant to one ton of sludge, then add 800 g of EM bacteria to obtain a mixed base Mix the mixed base material evenly with a mixer, mix the mixed base material evenly, and then stand at room temperature at 22°C for 24 hours to obtain the fermented base material through natural fermentation; during the fermentation process, the waste gas generated is deodorized by the waste gas recovery treatment device deal with.

[0040] Step 2, laying an earthworm bed with fermentation base material, the thickness of the earthworm bed is 10cm. Earthworms are raised in worm beds.

[0041] Step 3: After the earthworms have completed the conversion of the fermentation base material, the earthworms and the vermicompost are separated by a drum sieve, and the vermicomp...

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PUM

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Abstract

The invention discloses a method for treating domestic sludge by using earthworms. The method comprises the following steps: firstly, adding 60-300kg of traditional Chinese medicine residues, 150-200kg of wine residues, 300-600g of potassium permanganate and 400-700g of a deodorant into every ton of domestic sludge, carrying out mixing, then adding 500-1000g of EM bacteria, so as to obtain a mixedbase material, uniformly mixing the mixed base material, and naturally fermenting the mixed base material at a normal temperature to obtain a fermentation base material; then paving an earthworm bedby using the fermentation base material, and cultivating earthworms in the earthworm bed; and finally, carrying out separation treatment on the earthworms and wormcast, wherein the wormcast is used asnutrient soil, and the earthworms are recycled or incinerated for recovering heavy metals. According to the method for treating the domestic sludge provided by the invention, the stink of the domestic sludge is eliminated through fermentation, and the traditional Chinese medicine residues and the wine residues are degraded and converted for preparing good feed for the earthworms, so that the selected earthworms can survive and propagate in the earthworm bed, and the task of phagocytosis digestion and purification of the domestic sludge can be completed. In addition, resource reuse of the traditional Chinese medicine residues and the wine residues is realized.

Description

technical field [0001] The invention belongs to the technical field of biological treatment of domestic sludge, and in particular relates to a method for treating 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, 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. [0003] At present, the sludge treatment methods mainly include: 1. Landfill. Although this method is low in cost, it will cause great pollution to the surrounding ecological environment and g...

Claims

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Application Information

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IPC IPC(8): C02F11/02C02F11/06
CPCC02F11/02C02F11/06C02F2303/02C02F2303/04C02F2303/06
Inventor 吴名根
Owner 吴名根
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