1. The use of ultrafiltration membrane for activated sludge separation.;Smith;Proc. 24th Annual Purdue Industrial Waste Conference, Indiana, USA,1969
2. Solids separation by ultrafiltration for concentrated activated sludge;Hardt;J. Water Poll. Control Fed.,1970
3. Anaerobic digestion and membrane separation of domestic wastewater;Grethlein;J. Water Poll. Control Fed.,1978
4. Application of membrane anaerobic reactor system for the treatment of industrial wastewaters.;Li;Proceedings of 39th Annual Purdue Industrial Waste Conference, Indiana, USA,1984
5. The most compact system for nonpotable water;Uchida;Zosui Gijutu,1983