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Method for high-pressure homogeneous anaerobic digestion of high-solid-content sludge

A high-pressure homogenization and anaerobic digestion technology is applied in the environmental field to achieve the effects of low economic cost, remarkable effect and improved efficiency

Inactive Publication Date: 2022-01-07
JIANGSU TIANHONG ENVIRONMENTAL ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention provides a method for high-pressure homogeneous anaerobic digestion of sludge with high solid content, which is equipped with a method for high-pressure homogeneous anaerobic digestion of high-solid sludge, and realizes the reduction of sludge , stabilization and resource utilization, etc., which solve the problems of the above technologies

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  • Method for high-pressure homogeneous anaerobic digestion of high-solid-content sludge

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Experimental program
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Effect test

Embodiment 1

[0046] (1) Get a certain amount of sludge with a solid content rate of 17.10%, dilute it into sludge with a solid content rate of 9.10%, and use a 50 colloid mill to pulverize large-size impurities in the sludge;

[0047] (2) Take 500mL of the sludge prepared in step (1), pour it into the hopper of the high-pressure homogenizer, adjust the pressure gauge to 50MPa, stir the sludge in the hopper, and obtain the high-pressure homogenized sludge through the discharge port, homogenize once , its SCOD reached 5169.5mg / L;

[0048] (3) Put 150g of sludge into a 500ml normal saline bottle, then add 300g of inoculum, pass in nitrogen gas for 1min, seal it, and collect the gas produced by drainage and gas collection. The temperature was controlled at 38°C, and after 21 days of anaerobic fermentation, the gas production reached 1991ml, and the sludge VS removal rate reached 38.90%.

Embodiment 2

[0050] (1) Get a certain amount of sludge with a solid content rate of 17.10%, dilute it into sludge with a solid content rate of 7.10%, and pulverize large-size impurities in the sludge with a 50 colloid mill;

[0051] (2) Take 500mL of the sludge prepared in step (1), pour it into the hopper of the high-pressure homogenizer, adjust the pressure gauge to 20MPa, stir the sludge in the hopper, obtain the high-pressure homogenized sludge through the discharge port, and repeat the homogenization for 4 Second, its SCOD reached 10950mg / L;

[0052] (3) Put 150g of sludge into a 500mL normal saline bottle, then add 300g of inoculum, pass in nitrogen gas for 1min, seal it, and collect the gas produced by drainage and gas collection. The temperature was controlled at 38°C, and after 21 days of anaerobic fermentation, the gas production reached 1724ml, and the sludge VS removal rate reached 45.73%.

Embodiment 3

[0054] (1) Take a certain amount of sludge with a solid content rate of 4%, concentrate it to a solid content rate of 6.85%, and use a 50 colloid mill to pulverize large-size impurities in the sludge;

[0055] (2) Take 500ml of sludge prepared in step (1), pour it into the high-pressure homogenizer hopper, adjust the pressure gauge to 40MPa, stir the sludge in the hopper, obtain high-pressure homogeneous sludge through the discharge port, and repeat homogenization for 3 Second, its SCOD reached 4003.5mg / L;

[0056] (3) Put 150g of sludge into a 500ml normal saline bottle, then add 300g of inoculum, pass in nitrogen gas for 1min, seal it, and collect the gas produced by drainage and gas collection. The temperature was controlled at 38°C, and after 21 days of anaerobic fermentation, the gas production reached 1304ml, and the sludge VS removal rate reached 38.43%.

[0057] Such as figure 1 As shown, the high-pressure homogenizer is used to crack the high-solid sludge under the ...

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Abstract

The invention relates to the technical field of environment, and discloses a method for high-pressure homogeneous anaerobic digestion of high-solid-content sludge, which comprises the following steps: step 1, collecting sludge, and putting the sludge into high-pressure equipment for high-pressure homogenization; step 2, starting high-pressure equipment to carry out high-pressure homogenization on the sludge in the high-pressure equipment; step 3, taking out the sludge subjected to high-pressure homogenization, and conducting sealing and placing; step 4, adding sludge into biogas slurry, and conducting mixing and inoculating to obtain a mixed solution; and step 5, carrying out anaerobic fermentation on the inoculated mixed solution.

Description

technical field [0001] The invention relates to the field of environmental technology, in particular to a method for high-pressure homogeneous anaerobic digestion of sludge with high solid content. Background technique [0002] Sludge usually contains pathogenic microorganisms, harmful heavy metals, refractory organic matter and other substances, which will cause secondary pollution if not handled properly. Anaerobic digestion technology refers to the decomposition of biodegradable organic matter in sludge into carbon dioxide, methane and water by anaerobic bacteria and facultative bacteria under anaerobic conditions. Compared with other sludge treatment and disposal technologies, anaerobic digestion technology not only has the advantages of reducing and stabilizing sludge, but also generates biogas to realize sludge recycling. [0003] Generally, the solid content of traditional anaerobic digestion process is 2% to 4%, which has disadvantages such as long treatment cycle, ...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/04
CPCC02F11/00C02F11/04C02F2303/06
Inventor 戴家旗张盼月戴家凤汤红泉徐时红于德顺
Owner JIANGSU TIANHONG ENVIRONMENTAL ENG
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