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Method for producing organic fertilizer by using municipal sludge

A municipal sludge and organic fertilizer technology, which is applied in the preparation of organic fertilizers, organic fertilizers, sewage/sludge fertilizers, etc., can solve the problems of unsuitable for large-scale sludge treatment, production is greatly affected by weather, and low composting process efficiency and other problems, to achieve the effect of reducing water evaporation, reducing the content of heavy metals, and reducing residence time

Inactive Publication Date: 2018-04-20
江西洪城水业环保有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But using existing technology we found that the composting process is inefficient and costly
Not suitable for large-scale sludge treatment
At the same time, it covers a large area, takes a long time to ferment, and requires a large investment. Production is greatly affected by the weather.

Method used

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  • Method for producing organic fertilizer by using municipal sludge
  • Method for producing organic fertilizer by using municipal sludge
  • Method for producing organic fertilizer by using municipal sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] The sludge with water content of 80% is pumped into the agitator with a mud pump, and fly ash (or plant ash) is added according to 10% of the sludge weight, and 0.02% ferric chloride is added according to the sludge weight (1000g sludge is added with 0.2g chlorine Iron), stir at a speed of three revolutions per minute for 5-8 minutes, leave it for 2-3 hours after stirring, enter the screw extruder, squeeze out part of the water, (outlet water into the pool, add heavy metal precipitant and stir for 10 minutes After standing still, the supernatant is returned to the sewage treatment system), until the water content is below 60%, the dewatered sludge is fed into the fermentation tank with a belt,

[0080] At the same time of pretreatment, according to the sludge with a water content of about 80%: auxiliary materials (mushroom dregs or traditional Chinese medicine dregs) = 1000:150-200 ratio, input auxiliary materials into the fermenter with a belt, and open the jacket to he...

Embodiment 2

[0087] In order to verify the application effect of sludge organic fertilizer produced by Jiangxi Hongcheng Water Industry Environmental Protection Co., Ltd. on grass, we conducted a test on the application of sludge organic fertilizer on grass in Jinxian Sewage Plant. Test fertilizer

[0088] The sludge organic fertilizer of the present invention has a total nutrient content of 5.37%, wherein total nitrogen is 2.42%, total phosphorus is 1.97%, total potassium is 0.98%, and organic matter content is 64.7%;

[0089] with

[0090] The "Jinyongyuan" brand organic fertilizer produced by Jiangxi Jinyongyuan Agricultural Technology Co., Ltd. has a product label: total nutrient content ≥ 6%, organic matter ≥ 45%.

[0091] Test soil

[0092] The soil quality is yellow clay, with medium to low soil fertility.

[0093] Test crops

[0094] Tall fescue Airui No. 3 is a greening grass that is customarily planted in the local area.

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Abstract

The invention relates to a method for producing an organic fertilizer by using municipal sludge. The method comprises the following steps: step 1, conditioning to stir and mix sludge containing 80% ofwater, ferric chloride and plant ash, mixing evenly, then allowing to stand for 2-3 hours, and extruding; and step 2, carrying out high temperature fermentation of the extruded sludge, adding mushroom residues or traditional Chinese medicine residues, introducing into a fermentation tank, stirring, heating, supplying with oxygen, adding fermentation bacteria, fermenting for 16-20 hours, and making the moisture of the material less than 30% to obtain the product.

Description

technical field [0001] The invention relates to a method for treating sludge, in particular to a method for producing organic fertilizer from municipal sludge. Background technique [0002] The amount of municipal sludge in our country is at least 1.4 million tons (dry sludge) every year, more than 50% of which have not been digested, which has brought serious pollution to the environment. At present, the treatment technology adopted in China is mainly biological treatment, including anaerobic and aerobic digestion. [0003] As far as the nature of municipal sludge in my country is concerned, the organic matter content in sludge exceeds 50%, and contains a large amount of nutrients such as N and P. The output of municipal sludge is related to the water quality and treatment process of sewage. In general, the output of municipal sludge in my country is huge and its composition is complex. The high content of organic matter makes it easy to corrupt and produce stench, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F15/00C05F17/00C05F7/00
CPCC05F5/00C05F5/006C05F7/00C05F17/00C05F11/08Y02A40/20Y02W30/40
Inventor 洪玉春程宇凯高文华魏锋
Owner 江西洪城水业环保有限公司
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