Water purification of arsenic contaminated drinking water via air gap membrane distillation (AGMD)
2014 (English)In: Periodica Polytechnica, Mechanical Engineering, Vol. 58, no 1, 47-53 p.Article in journal (Refereed) Published
Arsenic contamination in shallow tubewell water is a serioushealth issue in Bangladesh and other Southeast Asian countries.Rural and remote areas in these locations continue toface tremendous challenges in providing access to affordableand safe arsenic-free drinking water. In recent years, intensiveefforts have been undertaken to identify appropriate technologiesfor arsenic removal. This study examines one approach byinvestigating the application of suitable membrane technologies,specifically air gap membrane distillation (AGMD), asa promising method for small-scale, low cost deployment. Theobjective of this study was to test an AGMD commercial prototype(nominal capacity of 2 L/hr) with three different feedstocks:arsenic-containing groundwater (medium concentration) andarsenic-spiked tap water (medium and high concentrations).Results show that the tested AGMD prototype is capable ofachieving excellent separation efficiency, as all product watersamples showed arsenic levels well below WHO accepted limits(10 μg/L) even for initial concentrations over 1800 μg/L.Parametric studies with focus on variation of coolant temperatureillustrate the possibility of integrating AGMD in variousthermal systems.
Place, publisher, year, edition, pages
2014. Vol. 58, no 1, 47-53 p.
arsenic removal · air gap membrane distillation (AGMD) · internal heat recovery · MD performance
Research subject Energy Technology
IdentifiersURN: urn:nbn:se:kth:diva-145681DOI: 10.3311/PPme.7422ScopusID: 2-s2.0-84898015535OAI: oai:DiVA.org:kth-145681DiVA: diva2:719563
QC 201409232014-05-262014-05-262014-09-23Bibliographically approved