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A kind of method and application of heterogeneous fenton catalyst prepared from waste biogas residue

A heterogeneous catalyst technology, applied in the field of comprehensive waste utilization and water treatment, can solve the problems of limited promotion and application, complex preparation process, poor stability, etc., achieve high catalytic activity and stability, simple preparation method and low cost low effect

Active Publication Date: 2019-04-26
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalysts currently developed often have complex preparation processes, high costs, and poor stability, which severely limit the promotion and application of this technology.

Method used

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  • A kind of method and application of heterogeneous fenton catalyst prepared from waste biogas residue
  • A kind of method and application of heterogeneous fenton catalyst prepared from waste biogas residue
  • A kind of method and application of heterogeneous fenton catalyst prepared from waste biogas residue

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Experimental program
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Effect test

Embodiment 1

[0031] The raw biogas residue is cleaned, dried at 80°C, crushed to powder, and processed with a KOH solution with a concentration of 3 mol / L and a ferric nitrate solution with a content of 50%. The impregnation ratio is KOH:dried biogas Slag: ferric nitrate solution=3L:100g:1L, the immersion time is 2 hours, the agitator is mixed at 80 rpm, and the solid precipitate is collected after standing for 1 hour, and then the solid precipitate is activated at high temperature in a microwave oven. The pyrolysis temperature was 700 °C, the microwave power was 350 W, nitrogen was used to isolate oxygen protection during the microwave activation process, the nitrogen flow rate was 150 mL / min, and the microwave activation time was 30 minutes. After activation, the sample was activated with a concentration of 2 mol / L h 2 SO 4 After the solution is pickled until the pH value does not change, rinse with pure water to remove impurities, dry, and sieve to obtain a biogas residue-based heterog...

Embodiment 2

[0039] Clean the raw material biogas residue, dry it at 80°C, and crush it into powder, and carry out a one-step synthesis process with a KOH solution with a concentration of 3 mol / L and a mixed solution of ferric nitrate and manganese nitrate with a content of 50%. The ratio is KOH solution: dry biogas residue: mixed metal salt solution = 3L: 100g: 1L, wherein the mixing volume ratio of ferric nitrate solution and manganese nitrate solution is 3:1, the immersion time is 3 hours, and the agitator is carried out at 80 rpm Mix well, collect the solid precipitate after standing for 1 hour, and then activate the collected solid precipitate in a microwave oven at high temperature, the pyrolysis temperature is 700 ℃, and the microwave power is 350 W. During the microwave activation process, nitrogen is used to isolate oxygen protection. , the nitrogen flow rate was 150 mL / min, the microwave activation time was 30 minutes, and the concentration of 2 mol / L H 2 SO 4 The solution was p...

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Abstract

The invention discloses a method and application for preparing heterogeneous Fenton catalyst from waste biogas residue, and belongs to the fields of comprehensive utilization of waste and water treatment. It includes the following steps: waste digestate is washed, dried, crushed, impregnated with salt solutions of activators and transition metals, microwave activated, pickled and screened to prepare high specific surface area and rich in catalytic active components. Digest residue-based heterogeneous Fenton catalyst. The preparation method of the present invention is simple, easy to operate, and low in cost. The prepared catalyst can catalyze Fenton oxidation treatment of wastewater at normal temperature and pressure, has a wide pH applicable range, efficient catalytic activity and stability, and effectively solves the problem of high additives to waste biogas residues. It solves the problem of resource utilization, reduces the preparation cost of Fenton catalyst, has environmentally friendly and sustainable development technical characteristics and good industrial application prospects.

Description

technical field [0001] The invention relates to a method for preparing a heterogeneous Fenton catalyst from waste biogas residue, which is applied to advanced treatment of various waste water and belongs to the fields of waste comprehensive utilization and water treatment. Background technique [0002] Anaerobic fermentation technology converts livestock and poultry manure, straw, sludge and other wastes into energy efficiently to generate biogas, which effectively solves the problem of resource utilization of such wastes and achieves good economic and environmental benefits. However, with the rapid development of biogas projects, a large amount of anaerobic digestion residues rich in organic pollutants and pathogenic microorganisms have also been produced, and its harmless and resourceful utilization has become a constraint to the promotion and application of anaerobic fermentation biogas. the bottleneck. Especially in livestock and poultry manure, the excessive content of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/745B01J23/889B01J35/10C02F1/72C02F103/28
CPCC02F1/722C02F1/725B01J23/745B01J23/8892C02F2103/28C02F2305/026B01J35/615B01J35/633
Inventor 单胜道庄海峰薛向东汪华方程冉袁小利
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY