Flotation of cadmium-loaded biomass

Journal Article · Fri Jul 01 04:00:00 EDT 1994 · Biotechnology and Bioengineering; (United States)

DOI:https://doi.org/10.1002/bit.260440313· OSTI ID:7264857

Matis, K A; Zouboulis, A I ^[1]

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1. Aristotle Univ., Thessaloniki (Greece). Chemical Technology Div.

Biosorption of heavy metal ions such as Cd[sup 2+] by dead biomass has been recognized as a potential alternative to existing removal technologies applied to wastewater treatment. Two bacterial strains were studied in the laboratory, Streptomyces griseus and S. clavuligerus, an industrial by-product. Both washed and unwashed samples were examined. Foam flotation is proposed in this work as the separation stage following biosorption. Effective biomass separation was conducted in the presence of a frother, ethanol. The pH of the solution was a crucial parameter for flotation and also for metal binding. Other basic parameters of flotation examined were the initial cadmium concentration in the dilute aqueous solution and the quantity of biomass used. A study of [zeta]-potential measurements of the actinomycetes was carried out under the conditions used in the separation; surface tension was also measured. These provided useful information on the process.

• OSTI ID: 7264857
• Journal Information: Biotechnology and Bioengineering; (United States), Journal Name: Biotechnology and Bioengineering; (United States) Vol. 44:3; ISSN BIBIAU; ISSN 0006-3592
• Country of Publication: United States
• Language: English

Related Subjects

560300* -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BACTERIA
CADMIUM COMPOUNDS
MANAGEMENT
MATERIALS RECOVERY
MICROORGANISMS
PROCESSING
SORPTION
SORPTIVE PROPERTIES
STREPTOMYCES
SURFACE PROPERTIES
WASTE MANAGEMENT
WASTE PROCESSING