Encyclopedia of Membranes

Living Edition
| Editors: Enrico Drioli, Lidietta Giorno

Air Bubbling in Membrane Distillation

Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-40872-4_813-1

Air bubbling is a common method that is used in membrane separation process to alleviate membrane fouling and improve flux. It also is a kind of membrane cleaning method. Till now, gas-liquid two phase flow has been well studied and widely used in microfiltration, ultrafiltration (Cabassud et al. 1997), membrane bioreactor (Psoch and Schiewer 2005), and other traditional membrane separation technologies.

Based on the above advantages of air bubbling, it has been introduced into membrane distillation (MD) process to alleviate membrane fouling and improve the heat and mass transfer efficiency. Researchers have introduced air bubbling into MD process and developed several new kinds of MD process.

The first application of air bubbling in MD process was firstly reported in 2008 (Ding et al. 2008) to concentrate the extract of traditional Chinese medicine (TCM). Air bubbling was used in direct contact membrane distillation (DCMD) and the flow sheet is shown in Fig. 1.


Feed Solution Membrane Module Membrane Fouling Membrane Distillation Flux Decline 
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Authors and Affiliations

  1. 1.State Key Laboratory of Hollow Fiber Membrane Materials and Membrane Processes, Institute of Biological and Chemical EngineeringTianjin Polytechnic UniversityTianjinChina