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Biochar finish machining method capable of improving anaerobic biological reaction efficiency

An anaerobic biology and reaction efficiency technology, applied in the field of environmental protection and comprehensive utilization of resources, can solve the problems of reducing anaerobic digestion efficiency and the effect is not very significant, and achieve the effect of accelerating leaching balance

Active Publication Date: 2018-05-18
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, literature [Y.Shen, J.L.Linville, P.A.A.Ignacio-de Leon, R.P.Schoene, M.Urgun-Demirtas, Towards sustainable paradigm of waste-to-energy process: Enhanced anaerobic digestion of sludge with woody biochar, J.Clean Prod. 135(2016) 1054-1064.] It was found that when the dosage of biochar is too large, it will reduce the efficiency of anaerobic digestion; literature [J.Cai, P.J.He, Y.Wang, L.M.Shao, F.Lü, Effects and optimization of the use of biochar in anaerobic digestion of food wastes, Waste Manage.Res.34(5)(2016)409-416.] found that when the activity of anaerobic digestion microorganisms is already high, the effect of adding biochar is not very significantly

Method used

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  • Biochar finish machining method capable of improving anaerobic biological reaction efficiency
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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The crude biochar is derived from pyrolytic charcoal obtained by pyrolysis of fruit trees at 500°C for 2 hours, and the initial particle size ranges from 2-5mm. The coarse biochar was crushed into superfine biochar with a particle size of 1-5 μm by a jet mill. The ultrafine biochar was mixed with biochar from the same source but with different particle sizes (5000-2000, 2000-1000, 1000-500, 500-250, 250-150, 150-75, 75-45, 45-25, 25 ~16μm) for property analysis and comparison, including: C / H / O / N element analysis, X-ray fluorescence spectrum XRF, X-ray diffraction XRD, Fourier transform infrared spectrum FTIR, scanning electron microscope SEM, specific surface area, pore size distribution, Oxygen-containing functional groups, true density, dissolved organic carbon compounds in water immersion liquid, electrical conductivity, anion and cation concentrations, etc.; then, based on the test results of the above indicators, the principal component multidimensional statistical...

Embodiment 2

[0032] The finishing condition of biochar is identical with embodiment 1. The biochar obtained through the above finishing process is applied to the anaerobic digestion treatment of the initial leachate of the landfill, the dosage of biochar is 16g / L, and the COD concentration of the leachate is 28000mg / L. The maximum methanogenesis rate of the blank group without adding biochar was 18mL-CH 4 / g-COD / d, and the maximum methane production rate of the experimental group added with the biochar obtained by the method of the present invention is 51mL-CH 4 / g-COD / d. As a control, the maximum methane production rate of the control group added biochar with a particle size of 75-150 μm and biochar with a particle size of 2-5 mm was 36 mL-CH 4 / g-COD / d and 34mL-CH 4 / g-COD / d.

Embodiment 3

[0034] The finishing condition of biochar is identical with embodiment 1. The biochar obtained through the above finishing process is applied to the anaerobic digestion treatment of the kitchen waste slurry, the dosage of biochar is 16g / L, and the COD concentration of the slurry is 82000mg / L. Because the organic load of the slurry is too high, the vigor of methanogens is seriously inhibited. As a result, for the blank group without adding biochar, the lag period is as long as 28 days, while the experimental group added the biochar obtained by the method of the present invention. , its lagging period is shortened to 9 days. As a control, the lag period of the control group added biochar with a particle size of 75-150 μm and biochar with a particle size of 2-5 mm was 15 days and 18 days, respectively.

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Abstract

The invention relates to a biochar finish machining method capable of improving anaerobic biological reaction efficiency. The method comprises crushing crude biochar powder to obtain powder in a certain particle size range so that ultrafine biochar is obtained, and immersing the ultrafine biochar through an immersion solution. In anaerobic biological reactions such anaerobic digestion, carbon chain bio-extending and syngas fermentation, the biochar obtained by the biochar finish machining method can significantly increase the efficiency of anaerobic biological reactions, improve the effectiveness and stability of biochar application effects, reduce the dosage of biochar in application and reduce an application cost.

Description

technical field [0001] The invention belongs to the fields of environmental protection and resource comprehensive utilization, and relates to a biochar finishing method aimed at being applied to an anaerobic conversion process. Background technique [0002] The anaerobic biological reaction applied in the field of environmental resources is mainly "anaerobic digestion", which degrades organic matter in waste into methane and carbon dioxide. In recent years, the "biorefinery" technology developed puts more emphasis on using waste as raw materials to synthesize chemicals with higher resource value. For example, carbon chain biological extension technology uses anaerobic microorganisms to convert short carbon chain organic acids into medium and long Carbon-chain organic acids; Syngas fermentation technology uses anaerobic microorganisms to convert waste-derived syngas into methane and acid and alcohol products. [0003] Because anaerobic microorganisms grow slowly and are extr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05C12P7/40C12P5/02C02F3/28C02F103/06
CPCC02F3/28C02F2103/06C12P5/023C12P7/40Y02E50/30
Inventor 吕凡何品晶邵立明章骅
Owner TONGJI UNIV
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