Manufacturing method for biodegradable plastics using seaweed as a raw material

By culturing Cobetia bacteria in a seaweed-containing medium to synthesize PHA, the method addresses the need for using seaweed waste as a carbon source, producing biodegradable plastics with reduced environmental impact.

JP7745856B2Active Publication Date: 2025-09-30IWATE UNIVERSITY +1
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Patent Information

Application Number
JP2024026860
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2024-02-26
Publication Date
2025-09-30
Estimated Expiration
2039-12-03

AI Technical Summary

Technical Problem

Existing methods for producing polyhydroxyalkanoic acid (PHA) using sugars, vegetable oils, and alcohols compete with food sources, necessitating the development of a method using unused biomass like seaweed waste, particularly brown algae, as a raw material.

Method used

A method involving the culture of a microorganism, such as Cobetia bacteria, in a medium containing seaweed to assimilate alginic acid and synthesize PHA, eliminating the need for pretreatment and utilizing seaweed as a carbon source.

Benefits of technology

Enables the production of biodegradable plastics with a lower environmental impact by using seaweed as a raw material, reducing the dependence on food-based carbon sources and simplifying the production process.

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Abstract

To provide methods for producing PHA from seaweed as a raw material, and microorganisms that can synthesize PHA using seaweed as a raw material.SOLUTION: The invention provides a method for producing PHA using seaweed as a raw material, which comprises a step (a) of culturing a microorganism having alginate-assimilability and polyhydroxyalkanoate (PHA)-synthesizing ability in a culture medium containing seaweed. The invention provides a bacterial strain of the genus Cobetia having a 16S rRNA gene of which base sequence is the base sequence described in SEQ ID NO:1 or a base sequence having 90% or more identity to the base sequence described in SEQ ID NO:1.SELECTED DRAWING: None
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