Applying ceramic membrane in algae-based membrane bioreactor to remove nitrogen and phosphorous nutrients from wastewater

• Main Authors: Tsung-Min Hsieh, 謝宗旻
• Other Authors: Chang-Ping Yu
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/rru3wd

碩士 === 國立臺灣大學 === 環境工程學研究所 === 106 === The Algae-Membrane Bioreactor (A-MBR) was proposed and studied nowadays. The A-MBR can rise the biomass of microalgae efficiently and the quality of effluent. The ceramic membrane is used for A-MBR in this study. We try to find out the most efficient cleaning method for cleaning algae fouling on ceramic membrane. The algae immobilized will also test in A-MBR, we expect that immobilized can reduce the algae fouling. Chlorella vulgaris, Pseudokirchneriella subcapitata, Scenedesmus quadricauda and Haematococcus pluvialis were chose and cultivated in BG11 medium, In artificial wastewater (AWW) batch test, For free type, nitrate removal efficiency for four algae were similar. And S. quadricauda was the highest (23.06 ± 1.75%). For immobilized type, highest nitrate removal efficiency was 74.23 ± 11.19% of H. pluvialis, and S. quadricauda had the highest phosphate removal efficiency for 37.65 ± 10.72%. After that, leakage counting test showed that Chlorella vulgaris had the highest percentage for 1.3 ± 0.3%. The number of algae leakage was quiet low. Three cleaning method was tested in A-MBR. Results showed that offline cleaning method could fully recover the flux for triplicate trial. For flux declining batch test of A-MBR, results showed that flux reduction percentage for free and immobilized algae were 41.5 ± 14.01%、33.7 ± 0.89%. Flux reduction for Immobilized algae was less than free algae. For continues mode A-MBR in immobilized type, nitrate and phosphate removal efficiency were 18.69 ± 6.52% and 19.07 ± 6.84%. To improve the nutrient removal efficiency in A-MBR, the bioreactor was modified and raised the number of algae to 1754 MLSS mg/L. Afterward, nitrate and phosphate removal efficiency was 63.45 ± 1.92% and 58.44 ± 4.72%.