日本学術振興会:科学研究費助成事業 基盤研究(B)
研究期間 : 2018年04月 -2022年03月
代表者 : 雷 中方; 張 振亜; 清水 和哉; 水野谷 剛
The achievements can be summarized as follows.
(1) The influent to a local activated sludge-based wastewater treatment plant (WWTP) in Ibaraki Prefecture has been analyzed and characterized, which provides useful information for the preparation of synthetic wastewater used in the lab. The general energy and resources recovery potential has also been estimated in the context of this WWTP.
(2) Our experiments proved that the mixture algae separated and cultivated from the algal-bacterial granules could form algae granules successfully under the designed operation conditions, and the formed algae granules with good settleability and pollutants removal contained highly bioavailable P.
(3) Some typical operation conditions including light illumination, low carbon wastewater, and no mechanical aeration have been examined on the stability and performance of the algal-bacterial granules, which will be further optimized in the coming year. The dynamic changes in biological communities have also been analyzed under the test conditions.
(4) Two major algae species have been isolated from the mature algal-bacterial granules with their functions being identified, which showed excellent nutrients (N and P) removal and aggregation capability. Currently these two algae species together with two commercially functional algae are still being tested for their granulation capability and operation stability.
The above results have been partially summarized in 7 publications in high quality journals and 4 presentations in domestic/international conferences. Another 4 papers are still under review.