In methane fermentation, organic components will be converted into methane gas with the help of anaerobic bacteria. This resulting gas can be used as an alternative to heavy oil. The generated gas is defined as carbon-neutral fuel that does not emit carbon dioxide, so its use will reduce carbon dioxide emissions if it is used for heavy oil. Nippon Paper Industries has already commenced methane fermentation processing of waste liquids coming from the kraft pulp manufacturing process. While applying the technology, Nippon Paper Industries will review the use of acid hydrolysis liquid from dissolving pulp, which will be the world's first such case if it is successful.
Acid hydrolysis liquid has a range of potential applications. The first step will be to promote resource saving with the use of methane fermentation processing, as an environmental measure. Nippon Paper Industries will discuss higher-degree applications in the future.