膜分離活性汚泥法の将来展望

概要

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Future prospects of membrane bioreactors are discussed considering current status of MBRs including technical point of view. In current MBR systems in existing treatment plants, submerged system is predominant while new side-stream systems are developed using air-lift punps. Although many membrane materials are used for MBR modules, more hydrophilic and more smooth surface material would be preferred for future MBRs. Power consumption of MBRs are now decreasing thanks to technological innovations and less than 0.4 k Wh/m3 is obtained recently in Japan. Development of general MBR models, renovation of existing treatment plants utilizing MBR system and more understanding to good effluent quality from MBRs from view point of environment conservation would be helpful for more application of MBRs.