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

Spaans, PH; Van Roy, S; Hooyberghs, L; Winters, J; Macaskie, L; Finlay, J; Pumpel, T; Tsezos, M; Diels, L

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