Preparation method of "magnetic-base" combined modified biochar and its application in processing of maotai-flavor liquor wastewater

The preparation method of 'magnetic-alkali' combined modified biochar has solved the problems of insufficient performance and difficult recovery of biochar in anaerobic digestion, improved the treatment efficiency of soy sauce-flavored liquor wastewater, and achieved high efficiency in methane production and microbial attachment environment.

CN117865126BActive Publication Date: 2026-05-29LUZHOU LAOJIAO CO LTD +1
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Patent Information

Application Number
CN202410214233.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-02-27
Publication Date
2026-05-29
Estimated Expiration
2044-02-27

AI Technical Summary

Technical Problem

Existing biochar has problems such as insufficient performance enhancement and difficulty in recycling when used for anaerobic digestion of liquor wastewater. In particular, it inhibits the activity of methanogens in acidic environments, leading to the accumulation of VFAs and system acidification.

Method used

A method for preparing modified biochar using a 'magnetic-alkali' combined process was adopted, which included contacting biochar with KOH, pyrolysis, reaction of FeCl3 and FeSO4, pH adjustment with NaOH, and finally high-temperature pyrolysis under nitrogen protection to prepare modified biochar with high magnetic properties and a rough surface.

Benefits of technology

It improves the buffering capacity and methane production of anaerobic digestion of soy sauce-flavored liquor wastewater, realizes the recycling and reuse of biochar, reduces microbial loss, and is economical and environmentally friendly.

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Abstract

The application discloses a preparation method of "magnetic-base" combined modified biochar and application of the biochar in treatment of Jiangxiang Baijiu (Chinese liquor) wastewater, and belongs to the technical field of anaerobic fermentation. The modified biochar obtained by the method can effectively improve the buffering capacity of an anaerobic digestion system when treating Jiangxiang Baijiu wastewater, and improve the production and yield of methane; and the modified biochar has high magnetism and can be recycled, so that the problems of original biochar in the prior art, such as difficulty in recycling and difficulty in improving anaerobic digestion performance, can be effectively solved.
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