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A kind of sludge recycling method

A sludge recycling and sludge technology, applied in sludge treatment, sludge treatment, biological sludge treatment, etc., can solve the problems of low resource recycling rate and high energy consumption, reduce investment and production energy consumption, reduce The effect of carbonization and energy consumption reduction

Active Publication Date: 2019-09-20
GUIZHOU HUANKE ENVIRONMENT ECOLOGICAL RES & DEV CO LTD
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Problems solved by technology

[0005] The present invention intends to provide a method for recycling sludge to solve the problems of high energy consumption and low recycling rate of resources in the current sludge treatment technology

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  • A kind of sludge recycling method

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Embodiment Construction

[0019] The present invention will be described in further detail below by means of specific embodiments:

[0020] The invention provides a method for sludge recycling, the specific process is as follows figure 1 shown, including the following steps:

[0021] Step 1. Fermentation: Sludge with a moisture content of 83% and an organic matter content of 64% is sent to an upflow anaerobic sludge bed. The sludge bed is divided into sludge inlet area, reaction fermentation area, three-phase separation area, The air chamber, sedimentation area, supernatant overflow tank and outlet pipe are directly treated by the USAB method, and the sludge is anaerobically fermented, and the organic matter in the sludge is used to generate biogas;

[0022] Step 2. Separation: After 6 days of fermentation, the sludge is subjected to three-phase separation, solid sludge is obtained in the sedimentation area, liquid water is obtained in the supernatant overflow tank, biogas is obtained in the gas chamb...

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Abstract

The invention discloses a sludge recycling method which comprises the following specific steps: 1, fermenting, namely feeding sludge with the moisture content of more than 80% and the organic content of more than 50% into an upflow anaerobic sludge blanket, and performing anaerobic fermentation on the sludge; 2, separating, namely performing three-phase separation on the sludge, obtaining sludge, water and biogas, and directly discharging the water through overflow; 3, drying and carbonizing, namely feeding the obtained solid sludge into a carbonization furnace, drying at a temperature of 120 DEG C for an hour, heating to the temperature of 550 DEG C for carbonizing, wherein the carbonization time is 1.5 hours; 4, activating, namely adding ZnCl2 into the carbonized sludge for activating, thereby obtaining activated carbon; 5, purifying, namely introducing the biogas into the activated carbon, purifying, thereby obtaining the natural gas. According to the method disclosed by the invention, sludge resource recycling is really realized, harmless discharge is achieved, 60m<3> biogas can be produced from the sludge per tonnage, and the produced activated carbon and natural gas have obvious economic benefits.

Description

technical field [0001] The invention belongs to the technical field of resource recycling, and in particular relates to a sludge recycling method. Background technique [0002] With the rapid development of my country's economy and the rapid growth of urban population, a large number of urban sewage treatment plants have been added, and the amount of sludge treatment has increased dramatically. In 2010, my country's sludge output reached 36.65 million tons, and the investment for sludge treatment reached 35 billion yuan. From 2010 to 2016, the average annual growth rate was 12%, while the sludge treatment volume was only 50%, and a large amount of sludge was not treated, causing serious environmental pollution. Sludge treatment has become the focus of environmental pollution. [0003] The original sludge treatment technology is only a simple treatment of sludge through drying, landfill, composting and incineration. How to realize the "reduction", "harmless" and "recycling...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C02F11/04C02F11/13C02F11/10
CPCC02F11/00C02F11/04C02F11/12Y02E50/30Y02W10/20
Inventor 韩克余许善文张朝友赵明伦廖志强谢兴鹏
Owner GUIZHOU HUANKE ENVIRONMENT ECOLOGICAL RES & DEV CO LTD
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