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Method of using municipal sludge for preparing organic fertilizer

An organic fertilizer and sludge technology, which is applied in the preparation of organic fertilizers, organic fertilizers, sewage/sludge fertilizers, etc., can solve the problems of excessive heavy metal content in soil, environmental impact, insufficient organic matter and nutrient content, etc.

Inactive Publication Date: 2019-07-30
北京京创净源环境技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at the same time, there are also problems such as the failure of the garden waste to be disposed of in time, which will cause its impact on the surrounding environment, and the heavy metal content in the soil used for garden planting exceeds the standard, and the organic matter and nutrient content are insufficient.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 15 parts by weight of municipal sludge samples were taken and sterilized, and the temperature during sterilization was controlled at 100°C. After sterilization, add 10 parts by weight of peat, vermiculite and perlite, and fully stir; put the stirred sludge mixture into an organic-inorganic separation device, and add an organic-inorganic composite sludge conditioner, and the organic-inorganic composite sludge The weight ratio between the sludge flocculation dehydrating agent, the seepage drag reducer and the solidified proppant in the sludge conditioner is 1:1:1, and the content of the organic-inorganic composite sludge conditioner is 1% of the sludge weight, and the separation operation After the end, the sludge will be divided into three layers: supernatant, organic sludge and inorganic sludge.

[0033] Then the separated organic sludge is dehydrated, and the dehydrated organic sludge is subjected to sludge aerobic composting. During this process, air blowing and venti...

Embodiment 2

[0035] 15 parts by weight of municipal sludge samples were taken and sterilized, and the temperature during sterilization was controlled at 120°C. After sterilization, add 15 parts by weight of peat, vermiculite and perlite, and fully stir; put the stirred sludge mixture into an organic-inorganic separation device, and add an organic-inorganic composite sludge conditioner, the organic-inorganic composite sludge The weight ratio between the sludge flocculation dehydrating agent, the seepage drag reducer and the solidified proppant in the mud conditioner is 1:2:2, and the content of the organic-inorganic composite sludge conditioner is 2% of the sludge weight, and the separation operation After the end, the sludge will be divided into three layers: supernatant, organic sludge and inorganic sludge.

[0036] Then the separated organic sludge is dehydrated, and the dehydrated organic sludge is subjected to sludge aerobic composting. During this process, air blowing and ventilation ...

Embodiment 3

[0038]15 parts by weight of municipal sludge samples were taken and sterilized, and the temperature during sterilization was controlled at 110°C. After sterilization, add 20 parts by weight of peat, vermiculite and perlite, and fully stir; put the stirred sludge mixture into an organic-inorganic separation device, and add an organic-inorganic composite sludge conditioner, the organic-inorganic composite sludge The weight ratio between the sludge flocculation dehydrating agent, the seepage drag reducer and the solidified proppant in the mud conditioner is 1:1:2, and the content of the organic-inorganic composite sludge conditioner is 3% of the sludge weight, and the separation operation After the end, the sludge will be divided into three layers: supernatant, organic sludge and inorganic sludge.

[0039] Then the separated organic sludge is dehydrated, and the dehydrated organic sludge is subjected to sludge aerobic composting. During this process, air blowing and ventilation a...

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Abstract

The invention relates to the field of sludge treatment and discloses a method of using municipal sludge for preparing organic fertilizer. The method comprises the following steps that A, the sludge issterilized, and peat, vermiculite and perlite are added after sterilization and stirred thoroughly; B, an organic-inorganic composite sludge conditioner is added into the sterilized sludge, and the operation of separating organic sludge from inorganic sludge is performed; C, the organic sludge is subjected to dehydration treatment after separation and then subjected to aerobic composting to obtain the organic fertilizer. By means of the method, the municipal sludge can be effectively treated, the waste is turned into treasure at the same time, the sludge is converted into the organic fertilizer which can be used for garden plants, and sustainable use of resources is realized.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a method for preparing organic fertilizers from municipal sludge. Background technique [0002] With the increase of sewage treatment facilities in Beijing, the improvement of treatment rate and the deepening of treatment degree, the sludge output of sewage treatment plants has increased sharply. According to the "Three-Year Action Plan for Beijing to Further Accelerate Sewage Treatment and Reclaimed Water Utilization (July 2016-June 2019)", by the end of 2019, the level of harmless sludge treatment and resource utilization in the city will be further improved , The amount of sludge generated is expected to reach about 1.8 million tons. In this context, it is very necessary to further realize the ecological utilization of sewage treatment plant sludge. [0003] Currently, Beijing's disposal methods for sludge mainly include: sanitary landfill, incineration, land utilization, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05F17/00C02F11/14
CPCC02F11/148C05D3/02C05F17/00C05G3/00C05D9/00C05F7/00C05F11/02Y02W30/40
Inventor 马雄威高岩顾华于明张雅静
Owner 北京京创净源环境技术研究院有限公司
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