A hydrodynamic approach developed by a wired-membrane module forreducing the effects of concentration polarization and progressivefouling in membrane ultrafiltration, has been carried out. Thewired- membrane module is modified from a tubular-membrane module byinserting concentrically a steel rod wrapped entirely with a tightfitting wire spiral, having a diameter nearly equal to the annularspacing , as a spacer. Experiments for ultrafiltration of dextran T500aqueous solution in a wired-membrane module was carried out forvarious transmembrane pressures, feed concentrations, feed flow rates,and inclined angles of helical wire. Theoretical predictions werebased on the resistance-in-series model and confirmed qualitativelywith the experimental results. Considerable improvement of performanceis obtainable by employing a wired-membrane module rather than using atubular membrane module without or even with a steel rod insertedconcentrically.
第二十三屆輸送現象及其應用研討會暨膜分離論壇第四屆台灣-新加坡環境保護技術研討會論文集=Proceedings of The 23st Symposium of Transport Phenomena and 1ts Applications/Membrance Seperation Forum/The 4st Taiwan-Singapore Jiont Symposium on Environmental Technology