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Complete technology for treatment and disposal of sludge

A sludge treatment, complete set of technology, applied in sludge treatment, water/sludge/sewage treatment, fixed/solidified sludge treatment, etc., to achieve the effects of low cost, efficient utilization and simple process

Inactive Publication Date: 2019-04-23
CHINA CONSTR THIRD BUREAU GREEN IND INVESTMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a complete set of technology for sludge treatment and disposal in view of the deficiencies in existing cutter suction sludge dehydration and resource utilization

Method used

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  • Complete technology for treatment and disposal of sludge
  • Complete technology for treatment and disposal of sludge
  • Complete technology for treatment and disposal of sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-9

[0041] Embodiment 1-9 adopts following technological method to carry out processing disposal to sludge:

[0042] (1) Environmental protection dredging: the dredging operation is carried out through the environmental protection cutter suction type, and the sludge slurry is transported to the shore disposal center through pipelines for centralized treatment;

[0043] (2) Sludge slurry pretreatment: use gravity sedimentation and grid machine to remove large-sized gravel, mud, plastic bags, floating objects and other debris in the sludge, and the sludge slurry after removal of impurities flows into the adjustment tank for natural settlement ;

[0044] (3) Depth conditioning of sludge slurry: add flocculant to the pretreated sludge through the dosing system, and fully react through mechanical stirring to complete the flocculation and dehydration of the sludge slurry; after flocculation, the slurry is pumped into the pipeline mixer, and continuously through the dosing system Consol...

Embodiment 8

[0057] The appearance of the prepared silt planting soil in Example 8 shows a loose state, no peculiar smell and no obvious impurities; as can be seen from Table 4, its physical and chemical indicators such as water content and pH all reach the standard "Sludge Disposal of Urban Sewage Treatment Plants-Landscaping Use According to the requirements of Mud Quality (GB / T 23486-2009), its particle size has also been improved, which indirectly shows the cementation effect of the consolidation agent on fine particles; compared with the original silt, its air porosity and soil infiltration rate are both Significantly improved, reaching 26.4% and 151mm / h respectively, indicating that the prepared planting soil has a loose granulated structure, and its seed germination index has reached 92%, indicating that the silt planting soil has good activity and is suitable for plant growth.

[0058] In addition, the maximum water holding capacity of the silt planting soil in Example 8 reaches 172...

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Abstract

The invention relates to a complete technology for treatment and disposal of sludge. The complete technology comprises the following steps of (1) environment-friendly sludge cleaning: cleaning the sludge by an environment-friendly cutter suction method, and centrally treating the sludge; (2) pretreating of sludge slurry: removing foreign matter in the sludge by gravity precipitation and a grillagemachine, enabling the sludge slurry after removal of the foreign matter to flow into a conditioning tank, and naturally settling the sludge slurry; (3) deep conditioning of the sludge slurry: enabling an agent adding system to add a flocculant into the pretreated sludge, mechanically stirring, fully reacting, and completing flocculation and dewatering of the sludge slurry; pumping the slurry after flocculation into a pipeline stirring machine, and enabling the agent adding system to continuously add a solidifying agent; (4) modifying of the sludge: sending the sludge after deep conditioning into a double-shaft continuous type uniform mixing machine, enabling the agent adding system to continuously and quantitatively add a modifying agent, and adjusting the pH (potential of hydrogen) value, total content of nutrients, and porosity of ventilation; (5) curing. The complete technology has the advantages that the technology is simple, and the cost is low; the sludge can be truly properly treated and resourcefully utilized, and the development concept of circular economy is met.

Description

technical field [0001] The invention belongs to the technical field of environmental protection engineering, and in particular relates to a complete set of technology for sludge treatment and disposal. Background technique [0002] In water environment comprehensive improvement projects, dredging is often a key content in internal source control. At present, the environmental protection cutter suction type is being widely used in dredging projects due to its advantages of high precision, low disturbance, and convenient transportation. However, the water content of the cutter suction sludge is extremely high, usually 90% (dry basis divided by total weight) The above is difficult to deal with. At present, the treatment of suction sludge mainly adopts the method of chemical conditioning and plate-and-frame filter press, and the sludge cake is usually disposed of by landfill. Although the moisture content of the treated sludge is low after this process, the process is complicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G24/20A01G24/22A01G24/23A01G24/25A01G24/15A01G24/10A01G24/35A01G24/30C02F11/00C02F11/12C02F11/14
CPCA01G24/10A01G24/15A01G24/20A01G24/22A01G24/23A01G24/25A01G24/30A01G24/35C02F11/00C02F11/008C02F11/12C02F11/14
Inventor 薛强夏志勇罗金学彭冠平刘雯刘军
Owner CHINA CONSTR THIRD BUREAU GREEN IND INVESTMENT CO LTD
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