Development of bioprocess for recovering phosphorus from a variety of secondary resources for recycling

2015 Fiscal Year Final Research Report

• Project/Area Number: 25289294
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Biofunction/Bioprocess
• Research Institution: Waseda University (2015); Osaka University
• Principal Investigator: Ohtake Hisao 早稲田大学, 総合研究機構, 客員上級研究員 (10127483)
• Co-Investigator(Kenkyū-buntansha): OKANO KENJI 大阪大学, 工学研究科, 助教 (40623335)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: リン資源 / リン溶解菌 / 非晶質ケイ酸カルシウム / リンリサイクル

Outline of Final Research Achievements

To recycle phosphate (Pi) that is immobilized in steelmaking slag and farm soils, bacterial strains capable of mobilizing Pi salts with calcium, iron or aluminum, were isolated from steelmaking slag and soil samples. Organic acids, including gluconic acid, citric acid, and acetic acid, which were extracellularly released from the isolated strains, were responsible for releasing phosphate from insoluble Pi salts. A simple, new technology for phosphate recovery was developed using amorphous calcium silicate hydrates which were chemically synthesized using unlimitedly available inexpensive materials such as calcium and silicates. The technologies developed in this study could potentially be used for recycling Pi immobilized in steelmaking slag and farm soils.

Free Research Field

生物化学工学