A preparation method and application of nitrogen-doped biochar for enhancing anaerobic fermentation
By using nitrogen-doped biochar formed from the pyrolysis of tofu wastewater, the problems of low methane production and volatile acid accumulation in anaerobic fermentation were solved, electron transfer capacity and microbial activity were enhanced, and the resource utilization of agricultural waste and environmental improvement were realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NORTHEAST AGRICULTURAL UNIVERSITY
- Filing Date
- 2026-04-23
- Publication Date
- 2026-07-17
AI Technical Summary
Existing anaerobic fermentation technologies have low methane production rates and yields, and are prone to producing high levels of volatile acids that cause reactor acidification. Existing nitrogen-doped biochar suffers from problems such as unstable CN bonds and significant pollution.
Using tofu wastewater as a nitrogen source, it is mixed with straw biochar and silica gel for pyrolysis to form stable nitrogen-doped biochar, which enhances its electron transfer capacity and microstructure, and promotes microbial activity and metabolic efficiency.
It significantly increased methane production, reduced volatile acid content, improved the stability and gas production rate of anaerobic fermentation, and enabled the resource utilization of organic wastewater, thus improving environmental pollution issues.
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