Radial-flow constructed wetland sludge treatment system and method thereof

A technology of sludge treatment and constructed wetland, which is applied in the directions of sludge treatment, biological sludge treatment, dehydration/drying/thickened sludge treatment, etc. High costs and other problems, achieve the effect of uniform sludge distribution, low construction and operation costs, and remarkable effects

Active Publication Date: 2013-10-09
CHINA STATE CONSTRUCTION ENGINEERING CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a radial flow artificial wetland sludge treatment system and its method, to solve the problem of high

Method used

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  • Radial-flow constructed wetland sludge treatment system and method thereof
  • Radial-flow constructed wetland sludge treatment system and method thereof
  • Radial-flow constructed wetland sludge treatment system and method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Example 1, see figure 1 As shown, this radial flow constructed wetland sludge treatment system includes a sludge inlet pipe 1, a regulating tank 2, and four constructed wetland sludge treatment tanks. Four constructed wetland sludge treatment tanks are connected in parallel and connected to the regulating tank 2.

[0039] See figure 1 , 2 As shown, the pool body 16 is round or square, and the material of the pool body 16 is concrete, brickwork, soil, plastic or metal. The inside of the body 16 of the constructed wetland sludge treatment tank is successively laid with an anti-seepage film 6 from bottom to top, a gravel drainage layer 7 for collecting sludge leachate, and a filter layer 8 for purifying sludge leachate. And the sand layer 9 used for the separation of mud and water, above the sand layer 9 is a mud cake layer 10 formed by dried sludge, above the mud cake layer 10 is a sludge layer 11 to be treated, the gravel drainage layer 7, filtration Layer 8 and sand lay...

Embodiment 2

[0047] In the second embodiment, the constructed wetland sludge treatment tank 16 is a plastic bucket with a diameter of 0.82m and a height of 1.5m. It contains 15cm gravel with a diameter of 50mm as a gravel drainage layer, on which is a gravel filter layer with a diameter of 10mm and a thickness of 10cm. Above it is a sand layer with a diameter of 1mm and a thickness of 15cm. Above the sand layer is a mud cake layer. Reeds and cattails are planted. The bottom of the plastic bucket is equipped with a leachate outlet and a vent pipe provides air to the bottom of the wetland. After two months of treatment of the remaining sludge from the sewage treatment plant, the volume of the sludge was reduced by 68%, and the organic content in the sludge was reduced by 23%.

[0048]

[0049] This method of sludge drying and stabilization using a radial flow constructed wetland sludge treatment system is as follows:

[0050] Step 1: The sludge produced by the sewage treatment plant enters the adj...

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Abstract

The invention discloses a radial-flow constructed wetland sludge treatment system and a method thereof. The system comprises a sludge water inlet pipe, a regulating pool and at least one constructed wetland sludge treatment pool, wherein a pool body of the constructed wetland sludge treatment pool is internally provided with a gravel drainage layer for collecting sludge percolate, a filtering layer for purifying the sludge percolate as well as a sand layer for separating mud from water from bottom to top, a mud cake layer made of drying sludge is formed on the sand layer, a sludge layer to be treated is arranged on the mud cake layer, and wetland plants are planed in the pool body. The sludge is fully dried, the volume of the treated sludge can be reduced to 4%-30% of the original volume of the sludge; after anaerobic digestion and aerobic digestion are carried out on organic compounds in the sludge in the constructed wetland, and the content of volatile organic compounds in the sludge is reduced by 20%-30%. The constructed wetland sludge treatment technology has the advantages of remarkable sludge reduction and stabilizing treatment effect, low construction and operation cost, environment friendliness and the like.

Description

technical field [0001] The invention relates to an artificial wetland sludge treatment system and a sludge treatment method using the system. Background technique [0002] During the "Eleventh Five-Year Plan" period, my country's sewage treatment industry has developed rapidly, and the sewage treatment capacity and treatment rate have increased rapidly, resulting in a rapid increase in sludge production. By the end of 2012, there were more than 3,300 sewage treatment plants nationwide, with a daily sewage treatment capacity of 142 million tons and a sludge production of more than 30 million tons per day. If a large amount of sludge is not properly treated, random stacking will cause serious secondary pollution problems. [0003] Generally, the main component of sludge produced by sewage treatment plants is water, which exists in a fluid state, and the solid content only accounts for 0.5-2%, while most of the solids are microbial residues, and the organic components in the...

Claims

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Application Information

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IPC IPC(8): C02F11/02C02F11/12
CPCY02W10/20
Inventor 吴文伶宋中南张涛王珂
Owner CHINA STATE CONSTRUCTION ENGINEERING CORPORATION
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