Terms for the individual components of a membrane technology are used inconsistently for membrane bioreactors.
An ‘element’ can be considered to be the smallest replaceable component of the membrane technology. The term ‘module’ normally applies to a single element for a rectangular hollow fibre technology, but usually to a collection of elements in the case of flat sheets. The term ‘stack’ can be considered to apply generally to a collection of elements, though the terms ‘rack’, ‘unit’, ‘cassette’ and ‘skid’ are also used. A collection of immersed stacks is usually called a ‘train’, and the train may include the biological tank.
Terminology for MBR membrane products and technologies:
|Component||Flat sheet (FS)||Hollow Fibre (HF)
|Hollow Fibre (HF)
cylindrical bundle; Multitube (MT)
|Element||Panel, element, sheet, cartridge||Module, sub-unit||Module|
|Collection of elements||Module, cassette, unit||Rack, cassette, cartridge, module||Skid|
Abbreviations for membrane polymeric materials are:
|(HD)PE||(High density) polyethylene|