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Rural sludge organic fertilizer and preparation method thereof

A kind of organic fertilizer and rural technology, which is applied in the field of rural sludge organic fertilizer and its preparation, can solve the problems of solidified sludge that is difficult to degrade, achieve the effects of preventing fertilizer compaction, repairing and improving the soil environment, and reducing impact

Inactive Publication Date: 2021-07-23
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pathogenic bacteria, parasites and other toxic and harmful substances in the remaining sludge and the coagulation sludge produced by the coagulant are difficult to degrade, which is a problem that needs to be solved.

Method used

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  • Rural sludge organic fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1: Collect rural sludge in a decentralized rural domestic sewage treatment facility. It has a black appearance and a pungent smell, and its chemical properties are tested: BOD (biological oxygen demand), COD (chemical oxygen demand), NH3-N ( ammonia nitrogen content), TN (total nitrogen), TP (total phosphorus) contents are 80~100 mg / L, 200~250 mg / L, 35~40 mg / L, 50~55 mg / L, 6~8 mg respectively / L. The collected rural sludge is naturally air-dried, dried at 105°C, crushed and passed through a 100-mesh sieve;

[0025] Step 2: Prepare actinomycetes, lactic acid bacteria, yeast, and bacillus culture solution respectively: actinomycetes culture solution includes glucose 1g, yeast extract 0.4g, peptone 0.4g, dipotassium hydrogen phosphate 0.4g, potassium dihydrogen phosphate 0.4g , magnesium sulfate 0.05g, pure water 100ml; lactic acid bacteria culture solution includes pancreas extract 1g, beef extract 1g, yeast extract 0.5g, glucose 2g, Tween 0.8ml, dipotassium hydroge...

Embodiment 2

[0029] The difference with Example 1 is: in step 3, 25 parts of step 1 gained rural sludge powder, 20 parts of step 2 gained beneficial bacteria culture solution, 5 parts of inorganic minerals, 0.8 part of binder (bentonite, magnesium oxide mass ratio 1 : 1 mixture), 0.4 parts of anti-caking agent (fatty amine, fatty acid mass ratio 1:1 mixture) and stir and mix; add 8 parts of molasses in step 4.

Embodiment 3

[0031] The difference with Example 1 is: in step 3, 30 parts of step 1 obtained rural sludge powder, 22 parts of step 2 obtained beneficial bacteria culture solution, 6 parts of inorganic minerals, 0.8 part of binder (bentonite, attapulgite clay powder, Magnesium oxide mass ratio 1:1:1 mixture), 0.4 parts of anti-caking agent (silicon dioxide, fatty amine, fatty acid mass ratio 1:1:1 mixture) were stirred and mixed; in step 4, 8 parts of molasses were added.

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Abstract

The invention discloses a rural sludge organic fertilizer and a preparation method thereof. The organic fertilizer comprises the following raw materials in parts by mass: 20-35 parts of dried and crushed rural sludge, 15-25 parts of a beneficial bacterium culture solution, 5-6 parts of inorganic minerals, 0.6-1 part of a binder, 0.3-0.5 part of an anti-caking agent and 6-8 parts of molasses. The beneficial bacterium culture solution is a mixed culture solution of actinomycetes, lactic acid bacteria, saccharomycetes and bacillus. According to the rural sludge organic fertilizer, harmful substances such as pathogenic bacteria and parasites in sludge are killed through sludge high-temperature drying pretreatment; fermentation treatment is performed on the rural sludge by utilizing the aerobic bacteria property of the beneficial bacteria culture solution; the formed organic fertilizer avoids high-temperature sterilization, maintains the beneficial bacterium property of a beneficial bacterium culture solution, and improves the microbial activity of soil and the fertility of the soil by combining organic matters, nitrogen, phosphorus, potassium and other elements in the sludge.

Description

technical field [0001] The invention relates to the technical field of agricultural fertilizers, in particular to a rural sludge organic fertilizer and a preparation method thereof. Background technique [0002] With the continuous advancement of urban-rural integration, rural areas have gradually increased their attention to environmental issues, and built a large number of sewage treatment stations, and the amount of surplus sludge in rural areas has also increased year by year. Rural surplus sludge has the following characteristics: (1) high water content; (2) high organic matter content and rich in nitrogen, phosphorus, potassium and other elements; (3) containing heavy metal elements and pathogenic bacteria and other toxic and harmful substances. If a large amount of rural surplus sludge cannot be treated safely and effectively, it will not only cause secondary pollution of the environment, but also cause a waste of resources. [0003] Common residual sludge treatment ...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/30C05G3/80C05F17/20C05G5/12
CPCC05G3/00C05G3/30C05G3/80C05D9/00C05F17/20C05G5/12Y02W30/40
Inventor 陈丽娜赵子龙郭国冕吴问波毛欣宇邵孝候
Owner HOHAI UNIV
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