Method for utilizing earthworm to process urban life sludge

A technology of municipal domestic sludge and domestic sludge, which is applied in the field of treatment and can solve the problems of shortening the treatment time and so on

Inactive Publication Date: 2014-06-18
TIANJIN TANGGU XINYU ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the problems and deficiencies of the existing technologies, firstly to provide a low energy consumption and environmentally friendly treatment method for urban domestic sludge, in order to reduce the treatment cost of urban living sludge and reduce environmental pollution; secondly, to provide a A kind of method that shortens the treatment time and reduces the loss of nitrogen to treat municipal domestic sludge by earthworms

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1 A method of utilizing earthworms to treat municipal domestic sludge comprises the following steps:

[0016] (1) Selection of earthworm species: Eisenia foetida.

[0017] (2) Domestication of earthworms: at room temperature, in the first month, 0.4-0.5 kilograms of earthworms are fed per kilogram of earthworms per day, wherein the feed is dehydrated sludge and wheat straw with a moisture content of 60%-65% by 15: The weight ratio of 1 was used to stir the uniform mixture; then from the second month, the weight of dewatered sludge was increased by 1% in the feed every month until all were fed with dewatered sludge.

[0018] (3) Feeding sludge: feed the domesticated earthworms with dehydrated sewage with a moisture content of 60%-65% per kilogram of earthworms per day in an environment where the temperature is 10°C-16°C and the humidity is 70%-73%. The mud is 0.4-0.45 kg, and it is fed for 7 days at a time; when all the sludge at the head becomes vermicompost...

Embodiment 2

[0020] Embodiment 2 A method of utilizing earthworms to treat municipal domestic sludge comprises the following steps:

[0021] (1) Selection of earthworm species: tiny double-breasted earthworm (Bimastus parvus).

[0022] (2) Domestication of earthworms: at room temperature, in the first month, 0.4-0.5 kilograms of earthworms are fed per kilogram of earthworms per day, wherein the feed is dehydrated sludge and wheat straw with a moisture content of 60%-70% by 20: The weight ratio of 1 was used to stir the uniform mixture; then from the second month, the weight of dewatered sludge was increased by 1% in the feed every month until all were fed with dewatered sludge.

[0023] (3) Feeding sludge: feed the domesticated earthworms with dehydrated sewage with a moisture content of 65%-70% per kilogram of earthworms per day in an environment where the temperature is 16°C-22°C and the humidity is 73%-76%. The mud is 0.4-0.45 kg, and it is fed for 7 days at a time; when all the sludge...

Embodiment 3

[0025] Embodiment 3 A method of utilizing earthworms to treat municipal domestic sludge comprises the following steps:

[0026] (1) Selection of earthworm species: Mix the small Eisensis earthworms and the tiny double-breasted earthworms according to the weight ratio of 1:1 before use.

[0027] (2) Domestication of earthworms: at room temperature, in the first month, 0.4-0.5 kilograms of earthworms are fed per kilogram of earthworms per day, wherein the feed is dehydrated sludge and wheat straw with a moisture content of 60%-70% according to 18: Stir a uniform mixture with a weight ratio of 1; then increase the weight of the dewatered sludge in the feed at a rate of 1.5% month by month from the second month until all are fed with the dewatered sludge.

[0028] (3) Feeding sludge: feed the domesticated earthworms with dehydrated sewage with a moisture content of 60%-70% per kilogram of earthworms per day in an environment where the temperature is 22°C-28°C and the humidity is 7...

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Abstract

The invention belongs to the field of sludge processing, and relates to a method for utilizing earthworm to process urban life sludge. The method is executed according to the following steps: (1) adding microbe bacteria strain in life sludge to perform fermentation processing; and (2) selecting one or two (according to a weight ratio of 1:1) of eisenia foetida and bimastus parvus, mixing for reservation; putting earthworm at environment with the temperature of 10 DEG C-20 DEG C and the humidity of 70%-80%, pouring 0.4-0.5 Kg of dewatered sludge into per Kg of earthworm to feed earthworm, and pouring 7 times every day, and performing pouring when poured sludge all becomes earthworm manure. According to the method for utilizing earthworm to process urban life sludge, firstly, the biological technology combining microbe and earthworm is utilized, so that life sludge is relatively well processed; and secondly, life sludge is utilized for earthworm culture, manure drained by earthworm also can be used as organic fertilizer in agriculture and forestry, and earthworm also can be used as protein forage of livestock instead of common animal protein forages such as fish meal, meat meal and the like.

Description

technical field [0001] The invention belongs to the field of sludge treatment, and adopts a biological technology to treat municipal domestic sludge Background technique [0002] Domestic sludge is a secondary product after domestic sewage treatment. It is an extremely complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, colloids, etc. It is rich in organic matter, nitrogen, phosphorus and other mineral elements. It also contains maintenance A variety of trace elements for the normal growth and development of plants. Studies have shown that domestic sludge can increase the porosity of the soil and improve the ratio of the size of the pores, while reducing the soil bulk density and improving the stability of aggregates in the soil, water holding capacity and soil water retention capacity. has broad application prospects. [0003] At present, there are many problems caused by the sludge landfill of urban sewage plants: first, it consum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/02
Inventor 孙杨张德强吴树壮李卓坪
Owner TIANJIN TANGGU XINYU ENVIRONMENTAL PROTECTION TECH
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