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Method for manufacturing organic fertilizer by utilizing sludge

An organic fertilizer and sludge technology, applied in the field of aerobic fermentation engineering, can solve the problems of low reduction effect, high investment and operation cost, serious nitrogen loss, etc. The effect of promoting growth and development

Inactive Publication Date: 2009-11-11
POTEN ENVIRONMENT GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At the same time, there are the following problems in the process of sludge composting: serious loss of nitrogen, low reduction effect, long composting time, odor, high investment and operating costs, etc.

Method used

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  • Method for manufacturing organic fertilizer by utilizing sludge
  • Method for manufacturing organic fertilizer by utilizing sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1: provide a kind of method utilizing sludge to produce organic fertilizer, this method comprises the following steps:

[0051] 1) Add an additive with a water content of 15% and a weight ratio of 30% to the sludge with a water content of 80% and a weight ratio of 70% after pressure filtration dehydration.

[0052] 2) The obtained mixture is piled up and fermented for 24 days, and turned over and thrown 4 times a day;

[0053] 3) get rid of the moisture content that mixture produces in the fermentation;

[0054] 4) increase the air content to accelerate the fermentation of the mixture;

[0055] 5) Deodorization;

[0056] 6) The fermented mixture is an organic fertilizer, which is then made into a granular fertilizer product.

[0057] The specific steps of the mixture fermentation obtained in the described step 2):

[0058] a) The mixture was fermented for 2 days under the condition that the temperature gradually increased from normal temperature to 55°C. ...

Embodiment 2

[0064] Example 2 is the same as Example 1, except that in step 2) the mixture obtained is piled up and fermented for 42 days, and turned over and thrown twice a day; Proceed as follows:

[0065] a) The mixture was fermented for 3 days under the condition that the temperature gradually increased from normal temperature to 55°C.

[0066] b) Under the condition of keeping the temperature at 55° C., the mixture was fermented again for 9 days.

[0067] c) the temperature is lowered to normal temperature, and the mixture is finally fermented for 30 days.

[0068] Step 6) described in embodiment 1) the mixture that finishes fermentation is organic fertilizer, and then it is made into powdery fertilizer finished product. In the specific steps of mixture fermentation, step d) that is also included after step c) is to lower the temperature to normal temperature, at this time, the temperature of the mixture is maintained at normal temperature, and the number of times of turning over th...

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Abstract

The invention relates to an aerobic fermentation process, in particular to a sludge processing method; and provides a method for manufacturing organic fertilizer by utilizing sludge comprising the following steps: firstly, adding an additive to the sludge; secondly, piling up the mixture which is obtained in the previous step for fermentation, overturning and throwing; and finally, obtaining the organic fertilizer by secondary fermentation for the mixture, and making the organic fertilizer to particles or powder to obtain fertilizer finished products. The invention has the advantages of less investment, less field occupation, short processing period, low running cost and good product quality; the invention further has the advantage that no 'three wastes' are produced in the manufacturing process.

Description

technical field [0001] The invention relates to an aerobic fermentation project, in particular to a sludge treatment method. Background technique [0002] Urban sewage treatment is an environmental protection problem that needs to be solved during the "Ninth Five-Year Plan" and "Tenth Five-Year Plan" in my country. While vigorously carrying out sewage treatment, it is also facing the problem of treating and disposing of its accompanying organisms --- sludge. Using urban sludge harmless and resource-based agricultural technology, using sludge as raw material, adding industrial waste - fly ash and N, P, K and other additives to make granular organic compound fertilizer, not only solves the problem It solves the problem of urban sewage sludge treatment, and can also comprehensively utilize sludge, fly ash and other pollutants, promote the development of environmental protection industries, and provide agriculture with organic compound fertilizers that can improve soil character...

Claims

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Application Information

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IPC IPC(8): C05F17/00C05F7/00
CPCY02A40/20Y02W30/40
Inventor 王少艮俞彬陈广升王玉慧
Owner POTEN ENVIRONMENT GRP
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