Membrane technology is a growing alternative for ammonia removal and recovery from wastewater compared to many other water treatment processes, such as strippers, scrubbers, and deaeration systems. Among the available alternatives, the TransMembraneChemiSorption (TMCS) has been gaining consideration, especially under certain operating conditions. TMCS using a membrane contactor is a unique separation process that is transitioning from research and pilot phases to field installations. This paper reviews the results of such an ammonia removal system using membrane contactors.

Biogas is a popular source of renewable energy. However, production and conversion of biogas at the same location can result in energy losses up to 60 %. This energy loss can be reduced by upgrading the biogas to biomethane for injection into an existing gas delivery network and other uses. In order to upgrade the raw biogas produced from agriculture and industrial plants unwanted and harmful gases like CO2 and H2S need to be removed. An innovative process for biogas conditioning using hollow fiber membrane contactors is presented. In comparison to membrane gas separation no elevated pressure is needed.

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