Harmless resourceful treatment method for municipal sludge

A technology of municipal sludge and treatment methods, which is applied in the fields of fertilizer treatment control, liquid/slurry treatment, fertilizer treatment heating/cooling, etc., and can solve problems such as not being able to meet environmental protection requirements

Inactive Publication Date: 2018-06-15
江苏省港海环保科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low temperature of traditional incineration, generally at 800-1000 ° C, other components in the sludge (such as Cl, S and other elements) are easy to generate new harmful pollutants such as dioxins during combustion.
In recent years, countries have attached great importance to the pollution of dioxin highly toxic substances, so the existing technology cannot meet the current strict environmental protection requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: a kind of municipal sludge harmless recycling treatment method, described method comprises the following steps:

[0021] Step 1: After the municipal sludge is salvaged, it is mixed with the remaining sludge and activated sludge of the domestic sewage treatment plant according to the weight ratio of 1:1:1;

[0022] Step 2: adding a leavening agent and a conditioning agent to the mixed sludge; adding 100 kilograms of a leavening agent and a conditioning agent to each ton of the mixed sludge;

[0023] Step 3: Stir the mixed sludge after adding leavening agent and conditioning agent evenly;

[0024] Step 4: Transport the mixed sludge evenly stirred in step 3 to the constant temperature drum for fermentation; the constant temperature drum is provided with a heating device; the heating device heats the mixed sludge in the constant temperature drum, and heats the mixed sludge to 50-55 degrees Celsius, and maintain a constant temperature, drive the constant tempe...

Embodiment 2

[0026] Embodiment 2: a kind of municipal sludge harmless recycling treatment method, described method comprises the following steps:

[0027] Step 1: After the municipal sludge is salvaged, it is mixed with the remaining sludge and activated sludge of the domestic sewage treatment plant according to the weight ratio of 1:1:1;

[0028] Step 2: adding a leavening agent and a conditioning agent to the mixed sludge; adding 100 kilograms of a leavening agent and a conditioning agent to each ton of the mixed sludge;

[0029] Step 3: Stir the mixed sludge after adding leavening agent and conditioning agent evenly;

[0030] Step 4: Transport the mixed sludge evenly stirred in step 3 to the constant temperature drum for fermentation; the constant temperature drum is provided with a heating device; the heating device heats the mixed sludge in the constant temperature drum, and heats the mixed sludge to 50-55 degrees Celsius, and maintain a constant temperature, drive the constant tempe...

Embodiment 3

[0032] Embodiment 3: a kind of municipal sludge harmless recycling treatment method, described method comprises the following steps:

[0033] Step 1: After the municipal sludge is salvaged, it is mixed with the remaining sludge and activated sludge of the domestic sewage treatment plant according to the weight ratio of 1:1:1;

[0034] Step 2: Add a leavening agent and a conditioning agent to the mixed sludge; the leavening agent and the conditioning agent are added with 100 kilograms of the leavening agent and the conditioning agent per ton of the mixed sludge; the leavening agent and the finishing agent are straw , straw, sawdust and household waste;

[0035] Step 3: Stir the mixed sludge after adding leavening agent and conditioning agent evenly;

[0036] Step 4: Transport the mixed sludge evenly stirred in step 3 to the constant temperature drum for fermentation; the constant temperature drum is provided with a heating device; the heating device heats the mixed sludge in t...

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PUM

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Abstract

The invention discloses a harmless resourceful treatment method for municipal sludge. The treatment method comprises the following steps: mixing municipal sludge, residual sludge of a domestic sewagetreatment plant and activated sludge according to a weight ratio of 1:1:1 and adding a swelling agent and a conditioning agent, wherein 100 kilograms of the swelling agent and the conditioning agent are added in each ton of the obtained mixed sludge; then carrying out uniform stirring and conveying the mixed sludge into a constant temperature roller for fermentation, wherein a heating device is arranged in the constant temperature roller; and heating the mixed sludge in the constant temperature roller to 50-55 DEG C by the heating device, preserving the temperature, and driving the constant temperature roller to carry out continuous fermentation on the mixed in the constant temperature roller for 30-35 days, so as to obtain a fertilizer. The harmless resourceful treatment method for municipal sludge provided by the application is simple and effective, and can share the pressure of sewage treatment plants.

Description

technical field [0001] The invention relates to a sludge treatment method, in particular to a harmless and resourceful treatment method for urban sludge. Background technique [0002] With the increasing scale of the city and the rapid development of the economy, the output of urban sludge has been increasing and has brought serious harm to the environment of the city and the ecological environment of nearby rivers. The sharp increase in the amount of urban sludge has brought obstacles to urban construction. Urban sludge accounts for a large proportion of the huge urban garbage mountain. [0003] In recent years, due to years of accumulation and no effective treatment methods, the sludge pollution of the lake has posed a serious threat to the surrounding ecological environment. Take Dianchi Lake as an example. At present, because there is no effective treatment method for the pollution of Dianchi Lake, the sludge at the bottom of Dianchi Lake has deposited a thick layer, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F15/00C05F17/00
CPCC05F7/00C05F17/40C05F17/60C05F17/70C05F9/00C05F11/00Y02P20/129Y02W30/40
Inventor 仇万龙仇正旺
Owner 江苏省港海环保科技集团有限公司
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