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Method and equipment for processing industrial sludge through ultrasonic wave in combination with Fenton reaction and anaerobic digestion

A technology of Fenton reaction and industrial sludge, applied in the oxidation treatment of sludge, sludge treatment, biological sludge treatment, etc., can solve the problems of high cost, increase the degree of inorganicization of sludge, etc. The effect of reducing equipment maintenance risks and good results

Inactive Publication Date: 2014-03-05
GUANGXI UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Fenton reaction (Fenton) is an advanced oxidation technology, through Fe 2+ with H 2 o 2 The reaction produces a strong oxidant hydroxyl radical, which then oxidizes and breaks down the sludge, destroys the cell wall of the sludge microorganism, releases the cytoplasm in the cell body, and decomposes the macromolecular refractory organic matter into small molecular substances, increasing the degree of inorganicization of the sludge , Fenton oxidation technology is an effective sludge pretreatment technology, but Fenton oxidation technology requires high concentrations of acid and ferrous ions and hydrogen peroxide, the cost is high, how to reduce the amount of hydrogen peroxide used, and further reduce the cost of Fenton oxidation is the direction of research

Method used

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  • Method and equipment for processing industrial sludge through ultrasonic wave in combination with Fenton reaction and anaerobic digestion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Pass the beer sludge sewage mixture into the ultrasonic Fenton reaction tank, H 2 O 2 The dosage of 11 g / L, Fe 2+ The dosage is 0.5 g / L, and sulfuric acid is added to adjust the pH to 1.5-2.0, the reaction time is 0.5 h, the reaction temperature is 50 °C, and the acoustic energy density of ultrasonication is set to 0.1 w / m 3 , ultrasonic time = 10 min; the anaerobic digestion tank is connected to the bottom of the ultrasonic Fenton reaction tank. The anaerobic digestion tank is equipped with a biogas outlet pipe, a sludge outlet pipe and a sewage outlet pipe. The sewage outlet pipe is connected to the sewage sedimentation tank and then to the recovery water tank. , the treated sludge can be directly used as the raw material of organic fertilizer, and a small amount of sewage at the outlet of the anaerobic digestion tank can be discharged after precipitation.

Embodiment 2

[0028] Pass the municipal sludge sewage mixture into the ultrasonic Fenton reaction tank, H 2 O 2 The dosage of 11 g / L, Fe 2+ The dosage is 0.8 g / L, and sulfuric acid is added to adjust the pH to 2.0-3.0, the reaction time is 1.5 h, the reaction temperature is 60 °C, and the acoustic energy density of ultrasonication is set to 0.2 w / m 3, the ultrasonic time is 30 min; the anaerobic digestion tank is connected to the bottom of the ultrasonic Fenton reaction tank. The anaerobic digestion tank is equipped with a biogas outlet pipe, a sludge outlet pipe and a sewage outlet pipe. The sewage outlet pipe is connected to the sewage sedimentation tank and then to the recovery water tank. The treated sludge can be directly used as the raw material of organic fertilizer, and a small amount of sewage at the outlet of the anaerobic digestion tank can be discharged after sedimentation.

Embodiment 3

[0030] Pass the starch plant sludge sewage mixture into the ultrasonic Fenton reaction tank, H 2 O 2 The dosage of 15 g / L, Fe 2+ The dosage is 1 g / L, and sulfuric acid is added to adjust the pH to 2.0-3.0, the reaction time is 1.5 h, the reaction temperature is 60 °C, and the acoustic energy density of ultrasonication is set to 0.3 w / m 3 , the ultrasonic time is 50 min; the anaerobic digestion tank is connected to the bottom of the ultrasonic Fenton reaction tank. The anaerobic digestion tank is equipped with a biogas outlet pipe, a sludge outlet pipe and a sewage outlet pipe. The sewage outlet pipe is connected to the sewage sedimentation tank and then to the recovery water tank. The treated sludge can be directly used as the raw material of organic fertilizer, and a small amount of sewage at the outlet of the anaerobic digestion tank can be discharged after sedimentation.

[0031] Example 3

[0032] Passing the colored sludge sewage mixture from the textile factory int...

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Abstract

The invention discloses a method and equipment for processing industrial sludge through ultrasonic wave in combination with Fenton reaction and anaerobic digestion. The processing method comprises a pre-processing step and a post-processing step, wherein the pre-processing step is to simultaneously carry out Fenton reaction and ultrasonic breaking reaction on industrial sludge in same equipment, so as to break the industrial sludge and release a dissolved matter, wherein conditions of the Fenton reaction are as follows: pH is 1.5-3.5, H2O2 addition is 7-21g / L, Fe2+ addition is 0.1-3g / L, reaction duration is 0.5-2.0 hours, reaction temperature is 50-70 DEG C, sound energy density of the ultrasonic breaking is 0.1-3W / m<3>, and ultrasonic duration is 10-50min; and the post-processing step is to feed sludge after the Fenton reaction and the ultrasonic breaking to an anaerobic digestion tank, so as to carry out anaerobic digestion to produce marsh gas, wherein one part of the produced marsh gas is adopted as fuel and the other part circulates into the tank from the bottom of the tank, to form internal circulation, thus replacing a stirrer and avoiding maintenance of the stirrer.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a method for the treatment and resource utilization of industrial sludge and urban sludge. Background technique [0002] With the rapid development of industrial economy and the continuous improvement of people's living standards, industrial production and urban life produce a large amount of sludge. Most of these sludges are disposed of in landfills, which occupy a large area and require high treatment costs. Some are used as agricultural organic fertilizer after treatment. In developed countries, sludge treatment and disposal is an extremely important link, and its investment accounts for about 50.0-70.0% of the total investment of sewage treatment plants. It can be seen that the cost of sludge treatment is high. [0003] Industrial sludge, especially food sludge, such as alcohol waste liquid, starch sludge, and cannery sludge is rich in organic matter and nutrients s...

Claims

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Application Information

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IPC IPC(8): C02F11/06C02F11/04
CPCY02E50/30Y02W10/20
Inventor 陈仁义王英辉许道全姜白杨张丹张瑞杰
Owner GUANGXI UNIV
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