In　this　paper,　underlying　mechanism　of　the　detachment　of　foulant　particles　from　the　planar　surface　was　analyzed.　Meanwhile　a　new　mathematical　model　was　proposed,　from　an　energy　viewpoint,　to　study　the　variation　of　energy　consumption　in　the　rinsing　process.　The　surface　properties　of　the　effluent　suspensions　at　various　rinsing　time　were　systematically　measured　and　the　interaction　energy　between　different　foulant　layers　were　analyzed　in　detail.　The　results　showed　that　the　model　simulation　could　predict　reasonably　the　energy　consumption　in　the　rinsing　process　under　different　conditions　(R-2　＞　0.97).　Moreover,　the　reliability　of　the　model　was　evaluated　by　model　parameters　and　model　constraints.　Additionally,　the　wide　adaptability　of　the　proposed　model　was　verified　by　considering　the　planar　surface　was　random　rough　(R-2　＞　0.97)　and　the　situation　of　real　wastewater　as　feed　suspension　(R-2　＞　0.98).　Furthermore,　the　actual　energy　consumption　for　foulant　particles　breaking　away　from　the　planar　surface　was　also　analyzed.　This　paper　would　provide　a　novel　approach　for　comprehensive　understanding　the　ex-situ　rinsing　process　in　membrane　bioreactors.