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Heavy metals removal from waste water by moving bed sand filters inoculated with heavy metal adsorbing or precipitating micro-organisms

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dc.contributor.author Spaans, PH en
dc.contributor.author Van Roy, S en
dc.contributor.author Hooyberghs, L en
dc.contributor.author Winters, J en
dc.contributor.author Macaskie, L en
dc.contributor.author Finlay, J en
dc.contributor.author Pumpel, T en
dc.contributor.author Tsezos, M en
dc.contributor.author Diels, L en
dc.date.accessioned 2014-03-01T02:48:45Z
dc.date.available 2014-03-01T02:48:45Z
dc.date.issued 1999 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/34083
dc.relation.uri http://www.scopus.com/inward/record.url?eid=2-s2.0-0033488871&partnerID=40&md5=d76a6a7af38d7eb9edb15938558a2f0b en
dc.title Heavy metals removal from waste water by moving bed sand filters inoculated with heavy metal adsorbing or precipitating micro-organisms en
heal.type conferenceItem en
heal.publicationDate 1999 en
heal.abstract The ultimate cleaning of heavy metal containing wastewater to metal concentrations below 0.1 ppm is difficult to achieve with economically acceptable physico-chemical techniques. The use of metal-sorbing or -bioprecipitating biomass offers such possibilities. However the efficiency depends of the biomass concentration and the regeneration of the biomass gives certain drawbacks. Therefore in this new application growing biomass is used in stead of dead biomass. For the removal of these low metal concentrations a special biotechnological method was developed with the objective the generation of a sludge which can be processed in a pyrometallurgical process. The MERESAFIN (MEtal REmoval by SAndFilter INoculation) system is based on the inoculation of a sandfilter with metal biosorbing or bioprecipitating bacteria. In order to do so AstraSand filters are inoculated with metal-biosorbing or-bioprecipitating micro-organisms. After filtration of the metal bearing wastewater, the biomass, forming a film on the filtration material, will contain high metal concentrations. Via a mechanical washing system this metal loaded biomass will be removed and leave a clean thin biofilm on the filtration material for reuse. The metals will be recycled by a pyrometallurgical treatment of the metal containing sludge in a shaft furnace. This process will allow a final polishing of metal contaminated wastewater in an economically acceptable way and without production of an extra waste stream. Results will be presented from lab experiments as well as from a pilot treating 30 m3/h with complete removal of Co, Ni, Cu and Zn. Also nitrates and COD can be removed. Results on metal removal from different waters and processing of metal loaded sludge will be presented. en
heal.journalName Proceedings of the TMS Fall Extraction and Processing Conference en
dc.identifier.volume 3 en
dc.identifier.spage 2337 en
dc.identifier.epage 2345 en


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