Development of novel membranes with embedded zirconium-based adsorbent for phosphate removal and recovery from wastewater

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K18175
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Civil and environmental engineering
• Research Institution: Chuo University
• Principal Investigator: Hafuka Akira 中央大学, 理工学部, 助教 (30735353)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 高分子膜 / ポリスルフォン / 限外ろ過膜 / リン除去回収 / 吸着剤 / ジルコニウム / 脱着 / 下廃水

Outline of Final Research Achievements

We developed novel membranes that could adsorb phosphate from water through membrane filtration for use in a phosphate removal and recovery system. Zirconium sulfate surfactant micelle mesostructure (ZS), which was the phosphate adsorbent, was embedded in a polysulfone matrix and flat sheet ultrafiltration membranes were prepared. Scanning electron microscopy showed that the ZS particles existed on both the top surface and in the internal surface of the membrane. The amount of phosphate adsorbed on the membrane with the 100 um thickness made from the polymer solution containing 10.5 wt% ZS was 0.039 mg P/cm2 during filtration of 50 mg P/L synthetic phosphate solution. The membrane could be repeatedly used for phosphate recovery after regeneration by filtration of 0.1 M NaOH solution to desorb the phosphate. We applied the membrane to treat the effluent from an anaerobic membrane bioreactor as a real sample and successfully adsorbed phosphate.

Free Research Field

水環境工学