Examination of zinc uptake in a combined system using sludge, minerals and ultrafiltration membranes

Katsou, E; Malamis, S; Haralambous, K

dc.contributor.author	Katsou, E	en
dc.contributor.author	Malamis, S	en
dc.contributor.author	Haralambous, K	en
dc.date.accessioned	2014-03-01T01:33:27Z
dc.date.available	2014-03-01T01:33:27Z
dc.date.issued	2010	en
dc.identifier.issn	0304-3894	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20428
dc.subject	Fouling	en
dc.subject	Minerals	en
dc.subject	Sludge	en
dc.subject	Ultrafiltration membranes	en
dc.subject	Zinc removal	en
dc.subject.classification	Engineering, Environmental	en
dc.subject.classification	Engineering, Civil	en
dc.subject.classification	Environmental Sciences	en
dc.subject.other	Activated sludge	en
dc.subject.other	Adsorption process	en
dc.subject.other	Alkaline pH	en
dc.subject.other	Chemical precipitation	en
dc.subject.other	Combined system	en
dc.subject.other	Contact time	en
dc.subject.other	Diffusion process	en
dc.subject.other	Filtration process	en
dc.subject.other	Grain size	en
dc.subject.other	Industrial wastewaters	en
dc.subject.other	Initial concentration	en
dc.subject.other	Intra-particle diffusion	en
dc.subject.other	Membrane bioreactor	en
dc.subject.other	Membrane permeability	en
dc.subject.other	Mineral addition	en
dc.subject.other	Mixed liquor suspended solids	en
dc.subject.other	Natural minerals	en
dc.subject.other	pH value	en
dc.subject.other	Powder size	en
dc.subject.other	Removal efficiencies	en
dc.subject.other	Sludge flocs	en
dc.subject.other	Specific concentration	en
dc.subject.other	Two stage	en
dc.subject.other	Ultra-filtration membranes	en
dc.subject.other	Zinc concentration	en
dc.subject.other	Zinc ions	en
dc.subject.other	Zinc removal	en
dc.subject.other	Adsorption	en
dc.subject.other	Bentonite	en
dc.subject.other	Biological water treatment	en
dc.subject.other	Bioreactors	en
dc.subject.other	Biosorption	en
dc.subject.other	Clay minerals	en
dc.subject.other	Concentration (process)	en
dc.subject.other	Industrial water treatment	en
dc.subject.other	Membrane fouling	en
dc.subject.other	Membranes	en
dc.subject.other	Minerals	en
dc.subject.other	pH effects	en
dc.subject.other	Precipitation (chemical)	en
dc.subject.other	Silicate minerals	en
dc.subject.other	Ultrafiltration	en
dc.subject.other	Wastewater	en
dc.subject.other	Wastewater treatment	en
dc.subject.other	Water filtration	en
dc.subject.other	Zinc	en
dc.subject.other	Zinc compounds	en
dc.subject.other	Chemicals removal (water treatment)	en
dc.subject.other	bentonite	en
dc.subject.other	vermiculite	en
dc.subject.other	zeolite	en
dc.subject.other	zinc ion	en
dc.subject.other	activated sludge	en
dc.subject.other	bentonite	en
dc.subject.other	bioreactor	en
dc.subject.other	diffusion	en
dc.subject.other	fouling	en
dc.subject.other	grain size	en
dc.subject.other	membrane	en
dc.subject.other	mineral	en
dc.subject.other	permeability	en
dc.subject.other	pollutant removal	en
dc.subject.other	precipitation (chemistry)	en
dc.subject.other	reaction kinetics	en
dc.subject.other	suspended load	en
dc.subject.other	ultrafiltration	en
dc.subject.other	vermiculite	en
dc.subject.other	waste treatment	en
dc.subject.other	wastewater	en
dc.subject.other	zinc	en
dc.subject.other	activated sludge	en
dc.subject.other	adsorption	en
dc.subject.other	alkalinity	en
dc.subject.other	article	en
dc.subject.other	biosorption	en
dc.subject.other	controlled study	en
dc.subject.other	enzyme membrane bioreactor	en
dc.subject.other	grain	en
dc.subject.other	industrial waste	en
dc.subject.other	kinetics	en
dc.subject.other	liquid	en
dc.subject.other	membrane permeability	en
dc.subject.other	particle size	en
dc.subject.other	pH	en
dc.subject.other	precipitation	en
dc.subject.other	suspended particulate matter	en
dc.subject.other	ultrafiltration	en
dc.subject.other	waste water management	en
dc.subject.other	Adsorption	en
dc.subject.other	Hydrogen-Ion Concentration	en
dc.subject.other	Kinetics	en
dc.subject.other	Membranes, Artificial	en
dc.subject.other	Minerals	en
dc.subject.other	Sewage	en
dc.subject.other	Ultrafiltration	en
dc.subject.other	Zinc	en
dc.title	Examination of zinc uptake in a combined system using sludge, minerals and ultrafiltration membranes	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.jhazmat.2010.05.101	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.jhazmat.2010.05.101	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	This work investigates the feasibility of zinc removal from wastewater with the use of ultrafiltration (UF) membranes combined with natural minerals and sludge. Activated sludge obtained from a membrane bioreactor (MBR) was enriched with initial zinc concentration of 320 mg/L and specific concentrations of zeolite, bentonite and vermiculite. The mixture was agitated and placed inside a batch ultrafiltration unit where the filtration process took place. The effect of several parameters on zinc removal was investigated including the mineral type, quantity and grain size, the metal-mineral contact time and the associated kinetics, the pH value, the zinc initial concentration and sludge mixed liquor suspended solids (MISS) concentration. The ultrafiltration membranes without any mineral addition were able to remove 38-78% of zinc ions due to biosorption on sludge flocs. The addition of minerals increased the Zn(II) removal efficiencies reaching in some cases more than 90%. Bentonite was the most effective mineral in zinc removal followed by vermiculite. Alkaline pH values favoured zinc removal due to enhanced chemical precipitation. A three-stage adsorption process was identified where the boundary layer diffusion process was followed by a two-stage intraparticle diffusion process. Powder size vermiculite was more effective than granular vermiculite in zinc removal. Minerals also resulted in membrane fouling mitigation since the membrane permeability drop was reduced. The combined sludge-mineral-ultrafiltration system can be effectively employed for the treatment of industrial wastewater. (C) 2010 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Journal of Hazardous Materials	en
dc.identifier.doi	10.1016/j.jhazmat.2010.05.101	en
dc.identifier.isi	ISI:000282240800004	en
dc.identifier.volume	182	en
dc.identifier.issue	1-3	en
dc.identifier.spage	27	en
dc.identifier.epage	38	en