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Preparation method for composite microbial fertilizer with bioleached sludge and composite microbial fertilizer

A compound microbial fertilizer and bioleaching technology, which is applied in the direction of sewage/sludge fertilizer, organic fertilizer preparation, bio-organic part treatment, etc., can solve the problems of fermentation materials such as cohesion and refractory degradation, achieve good nutrient supply capacity, reduce Fermentation cost, the effect of both stability and safety

Active Publication Date: 2014-12-17
天津市环投绿化工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the concentrated sludge for composting fermentation, harmful pests and bacteria, PAM and other substances will be reduced, but there will still be a small part of residues, especially PAM, which has strong water retention and is difficult to degrade. During fermentation, it will cause the fermentation material to stick.

Method used

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  • Preparation method for composite microbial fertilizer with bioleached sludge and composite microbial fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 has the following steps:

[0032] A. Mechanical crushing: use a crusher to pulverize the bioleaching sludge with a moisture content of 50%, the particle size of the pulverized bioleaching sludge is less than 5.0mm, and the organic matter content in the bioleaching sludge is 30%;

[0033] B. Sludge conditioning: add lime according to 0.8% of the dry weight of the above-mentioned bioleaching sludge, and adjust the pH value of the bioleaching sludge to 5.0; meanwhile, add auxiliary materials according to 4% of the wet weight of the bioleaching sludge, The auxiliary material for adjusting the porosity is a mixture of straw and mushroom slag, and the porosity of the bioleaching sludge is adjusted to 55%, and the conditioned bioleaching sludge is used as a fermentation raw material, and the organic matter content of the above fermentation raw material is controlled at 30%;

[0034] C. Reactor fermentation: inoculate the sludge fermentation agent according to 1.5‰...

Embodiment 2

[0038] Embodiment 2 has the following steps:

[0039] A. Mechanical crushing: use a crusher to pulverize the bioleaching sludge with a water content of 60%, the particle size of the pulverized bioleaching sludge is less than 5.0mm, and the organic matter content in the bioleaching sludge is 60%;

[0040]B. Sludge conditioning: add lime according to 1.2% of the dry weight of the above-mentioned bioleaching sludge, and adjust the pH value of the bioleaching sludge to 6.0; meanwhile, add auxiliary materials according to 6% of the wet weight of the bioleaching sludge, The auxiliary material for adjusting the porosity is a mixture of straw and mushroom slag, and the porosity of the bioleaching sludge is adjusted to 65%, and the conditioned bioleaching sludge is used as a fermentation raw material, and the organic matter content of the above fermentation raw material is controlled at 60%;

[0041] C. Reactor fermentation: inoculate the sludge fermentation agent according to 1.5‰ of ...

Embodiment 3

[0045] Embodiment 3 has the following steps:

[0046] A. Mechanical crushing: use a crusher to pulverize the bioleaching sludge with a moisture content of 55%, the particle size of the pulverized bioleaching sludge is less than 5.0mm, and the organic matter content in the bioleaching sludge is 45%;

[0047] B. Sludge conditioning: add lime according to 1.0% of the dry weight of the above-mentioned bioleaching sludge, and adjust the pH value of the bioleaching sludge to 5.5; meanwhile, add auxiliary materials according to 5% of the wet weight of the bioleaching sludge, The auxiliary material for adjusting the porosity is a mixture of straw and mushroom slag, and the porosity of the bioleaching sludge is adjusted to 60%, and the conditioned bioleaching sludge is used as a fermentation raw material, and the organic matter content of the above fermentation raw material is controlled at 45%;

[0048] C. Reactor fermentation: inoculate the sludge fermentation agent according to 1.5‰...

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Abstract

The invention discloses a preparation method for a composite microbial fertilizer with bioleached sludge. The method comprises following steps: taking half-dried bioleached sludge, mechanically grinding, sludge conditioning, fermenting in a reactor, drying, adding functional bacteria, and pelletizing and coating. The invention also discloses the composite microbial fertilizer which is prepared by the method discussed above with bioleached sludge. The composite microbial fertilizer contains organic matter, and nutrient elements which are essential for plant growth, such as nitrogen, phosphor and potassium. Because of the nutrient substances which are added in bioleaching processes and contain iron and sulfur, the composite microbial fertilizer also contains relatively abundant iron and sulfur, and can be used to provide nutrition for photosynthesis, and protein and nucleic acid synthesis of plant. The functional bacteria added into the composite microbial fertilizer possesses high stability and safety, and excellent ability for dissolving K and P. Compatibility of the functional bacteria is reasonable, and effective viable bacteria number is 0.025 billion per gram.

Description

technical field [0001] The invention relates to the technical field of agricultural fertilizer production, in particular to a low production cost, safe and environment-friendly method for producing compound microbial fertilizer from biological leaching sludge and the compound microbial fertilizer. Background technique [0002] Sludge bioleaching technology is a patented technology of Professor Zhou Lixiang of Nanjing Agricultural University (patent application number: 02112924.X; 02137921.1; 200410044843.8; 2011101558711.8). This technology uses yeast (Rhodotorula sp.) R30 to interact with Thiobacillus (Thiobacillus sp.) without adding any flocculant, so that the water content of urban sludge can be reduced to below 60%, and at the same time, it can effectively filter Remove heavy metals in urban sludge and kill pathogenic bacteria in urban sludge. [0003] Bioleaching sludge is the product of this technology. It has no odor, is earthy yellow in color, has a pH value of 3.0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05F7/00C05F17/00
CPCY02W30/40Y02A40/20
Inventor 韩德周魏宏刘才
Owner 天津市环投绿化工程有限公司
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