Japanese Firms Develop Low-Energy Ammonia Recovery Process from Biogas Wastewater
A consortium of Japanese companies, including Kimura Chemical Plants Co. and Kobe University, has developed a low-energy process to recover ammonia from biogas wastewater. This technology, utilizing forward osmosis membranes and heat-pump distillation, aims to enhance energy efficiency and reduce greenhouse gas emissions. Funded by NEDO from 2022 to 2025, pilot tests are underway in Kobe and Nagaoka, with the potential to recover 106 tonnes of nitrogen annually, supporting a circular nitrogen economy.
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A consortium of Japanese firms, including Kimura Chemical Plants Co., Kobe University, Novels Co., and FT Bio Power, has developed a low-energy process for recovering ammonia from biogas wastewater. This process combines forward osmosis membranes and heat-pump distillation, demonstrating improved energy efficiency over conventional methods.
Funded by Japan's NEDO from 2022 to 2025, pilot demonstrations began in May 2024 in Kobe and June 2025 in Nagaoka. The process could recover an estimated 106 tonnes of nitrogen annually and reduce carbon dioxide emissions equivalent to 133 kilolitres of crude oil. The consortium plans to centralize ammonia recovery from digestate sourced from multiple facilities.
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