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Method for processing city life sludge by using angleworm

A technology for urban domestic sludge and earthworms, applied in biological sludge treatment, animal husbandry, etc., can solve the problems of loss of nitrogen and long time, and achieve the effect of low treatment cost and simplified treatment process.

Inactive Publication Date: 2009-04-22
LANZHOU JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to stabilize the sludge in this method, the fermentation process takes 8 to 16 days, which takes a long time, and part of the nitrogen in the sludge will be lost during the fermentation process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1 A method for earthworm treatment of municipal domestic sludge, comprising the following steps:

[0015] (1) Selection of earthworm species: Eisenia foetida was selected.

[0016] (2) Domestication of earthworms: at room temperature, feed 0.4-0.5 kg of feed per kg of earthworms per day in the first month, wherein the feed is dehydrated sludge with a moisture content of 60-65% and wheat straw at a ratio of 15:1 Stir the uniform mixture with the weight ratio; then increase the weight of the dewatered sludge in the feed by 1% from the second month, until all are fed with the dewatered sludge.

[0017] (3) Sludge feeding: feed the domesticated earthworms with 0.4 to 0.4 to 0.4 to 0.4 to 0.4 to 0.4 of dewatered sludge with a moisture content of 60 to 65% per kilogram of earthworms per day in an environment where the temperature is 10 to 16°C and the humidity is 70 to 73%. 0.45 kg, fed for 7 days at a time; when all the sludge fed has become vermicompost, then fe...

Embodiment 2

[0019] Embodiment 2 A method for earthworms to treat municipal domestic sludge, comprising the following steps:

[0020] (1) Selection of earthworm species: Bimastus parvus was selected.

[0021] (2) Domestication of earthworms: at room temperature, feed 0.4-0.5 kg of feed per kg of earthworms per day in the first month, wherein the feed is dehydrated sludge with a moisture content of 65-70% and wheat straw at a ratio of 20:1 Stir the uniform mixture with the weight ratio; then increase the weight of the dewatered sludge in the feed by 2% ratio month by month from the second month until all are fed with the dewatered sludge.

[0022] (3) Sludge feeding: feed domesticated earthworms in an environment with a temperature of 16-22°C and a humidity of 73-76%, and feed 0.45-0.5 kg of dewatered sludge with a moisture content of 65-70% per kilogram of earthworms per day. , the amount of feeding for 7 days at a time; when all the sludge fed has become vermicompost, then feed again.

...

Embodiment 3

[0024] Embodiment 3 A kind of method that earthworms treat municipal domestic sludge comprises the following steps:

[0025] (1) Selection of earthworm species: Mix Eisenia chinensis and Diptera microbeast at a weight ratio of 1:1 and set aside for use.

[0026] (2) Domestication of earthworms: at room temperature, feed 0.4-0.5 kg of feed per kg of earthworms per day in the first month, wherein the feed is dehydrated sludge with a moisture content of 60-70% and wheat straw at a ratio of 18:1 Stir the uniform mixture with the weight ratio; then increase the weight of the dewatered sludge in the feed by 1.5% every month from the second month until all are fed with the dewatered sludge.

[0027] (3) Sludge feeding: put the domesticated earthworms in an environment with a temperature of 22-28°C and a humidity of 76-80%, and feed 0.45-0.5 kg of dewatered sludge with a moisture content of 60-70% per kilogram of earthworms per day. , the amount of feeding for 7 days at a time; when ...

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PUM

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Abstract

The invention relates to a method for treating urban domestic sludge by earthworms, which comprises the following steps: (1) selecting earthworm variety, namely selecting one or two of Eisenia foetida and micro double-chest earthworms, and mixing according to the weight ratio of 1 to 1 for standby; (2) domesticating the earthworms, namely, under room temperature, feeding earthworms according to 0.4 to 0.5 kilogram feed per kilogram of earthworm each day in the first month, wherein the feed is a mixture of dehydrated sludge and wheat straw which are mixed evenly according to the weight ratio of between 15 to 1 and 20 to 1; and then adding the dehydrated sludge accounting for 1 to 2 percent of the total weight of the feed into the feed month by month from the second month, till feeding the earthworms totally by the dehydrated sludge; and (3) feeding the earthworms by the dehydrated sludge, under the conditions that temperature is between 10 and 28 DEG C and humidity is 70 to 80 percent, feeding the domesticated earthworms based on 0.4 to 0.5 kilogram of the dehydrated sludge per kilogram of the domesticated earthworms per day, wherein the feeding amount for once is the amount for seven days; and feeding the earthworms again when the fed sludge becomes muckworm totally. The method can shorten treatment time, reduce loss of nitrogen, and obtain high-quality organic fertilizer and efficient adsorbent, namely the muckworm.

Description

technical field [0001] The invention relates to sludge treatment technology in the field of environmental protection, in particular to a method for earthworms to treat municipal domestic sludge. Background technique [0002] Municipal sludge refers to the product of dehydration treatment of residual sludge in sewage treatment plants. Using microbial fermentation to treat domestic sludge and making organic fertilizer is a good way to effectively utilize organic waste. It can effectively treat domestic sludge, avoid environmental pollution, and can also convert organic substances in sludge into Nutrients such as nitrogen, phosphorus, and potassium needed by crops enable organic waste to be recycled. However, in the process of microbial fermentation, part of the nitrogen in the sludge will be lost, and the odor produced during the fermentation process will also have certain adverse effects on the surrounding environment. [0003] It is not uncommon for earthworms to treat org...

Claims

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Application Information

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IPC IPC(8): C02F11/02A01K67/033
Inventor 伏小勇陈学民黄魁
Owner LANZHOU JIAOTONG UNIV
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