1. Gas separation membrane;Oya,1978
2. Application of membrane technology to fermentation production processes;Nagai;Membrane,1987
3. Wastewater treatment using oxygen enrichment membrane;Totsuka,1986
4. Wastewater treatment with trickling filtration method;Hikami,1985
5. An evaluation of aeration systems according to activated sludge kinetics and the oxygen transfer process;Hashimoto;Mizushorigijutsu,1982