Methane fermentation treatment method and methane fermentation treatment apparatus

The methane fermentation treatment method employs a liquid cyclone and sludge circulation to enhance separation and reduce equipment size and maintenance, addressing the separation challenges of fermentable and unfermentable materials in methane fermentation systems.

JP2026072903APending Publication Date: 2026-05-01KUBOTA CORP
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Patent Information

Application Number
JP2024183268
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-10-18
Publication Date
2026-05-01

AI Technical Summary

Technical Problem

Existing methane fermentation treatment systems face challenges in accurately separating fermentable and unfermentable materials, leading to equipment size and operational cost increases, as well as frequent maintenance due to sedimentation and valve blockages.

Method used

A methane fermentation treatment method utilizing a liquid cyclone for sedimentation separation, followed by solid-liquid separation, and a fermentation sludge circulation process to separate and remove unsuitable materials, reducing the need for large mixing tanks and dilution water, and incorporating a crushing and sorting device to preprocess organic waste.

Benefits of technology

The method effectively reduces clogging risks and improves the removal of unsuitable substances while maintaining efficient operation with smaller equipment and reduced water usage.

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Abstract

This invention provides a methane fermentation treatment method that can reduce the risk of clogging while improving the removal performance of unsuitable substances for fermentation, even when using a small supply of dilution hot water and a small-capacity mixing and adjusting tank. [Solution] A methane fermentation treatment method for treating organic waste containing unsuitable materials for fermentation with methane fermentation, comprising: a sedimentation separation step of separating the organic waste into a light component and a heavy component using a liquid cyclone; a solid-liquid separation step of separating the light component after the sedimentation separation step into solid and liquid components; a methane fermentation treatment step of supplying the liquid component after the solid-liquid separation step to a methane fermentation tank for methane fermentation treatment; and a fermentation sludge circulation step of extracting the fermentation sludge from the methane fermentation tank, supplying it together with the organic waste to the liquid cyclone performing the sedimentation separation step, and returning it to the methane fermentation tank as the light component after the sedimentation separation step.
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