Bacterial Leaching of Heavy Metals from Anaerobically Digested Sludge
Author: Lawrence Tung Kong Wong
Publisher:
Published: 1984
Total Pages: 604
ISBN-13:
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Author: Lawrence Tung Kong Wong
Publisher:
Published: 1984
Total Pages: 604
ISBN-13:
DOWNLOAD EBOOKAuthor: Lau Chi Chan
Publisher:
Published: 2001
Total Pages: 496
ISBN-13:
DOWNLOAD EBOOKAuthor: Avtar S. (Avtar Singh) Mavi
Publisher: National Library of Canada = Bibliothèque nationale du Canada
Published: 1991
Total Pages: 141
ISBN-13: 9780315654273
DOWNLOAD EBOOKAuthor: J. N. Lester
Publisher: Springer
Published: 1987-11-30
Total Pages: 176
ISBN-13:
DOWNLOAD EBOOKAuthor: Xiangyang Gu
Publisher:
Published: 2003
Total Pages: 554
ISBN-13:
DOWNLOAD EBOOKAuthor: Donald Lee Wise
Publisher: Springer
Published: 1988-09-30
Total Pages: 264
ISBN-13:
DOWNLOAD EBOOKAuthor: Brian Anthony Foulkes
Publisher:
Published: 2002
Total Pages: 170
ISBN-13:
DOWNLOAD EBOOKZinc and copper are supplemented into a swine's diet in relatively large concentrations and then further concentrated in sludge by anaerobic digestion. Anaerobic digestion, which produces energy and organic fertilizer, is gaining popularity as a treatment of swine manure. Land application can be used for disposal, although these sludges can contaminate the soil with heavy metals. The concentrations of zinc and copper in anaerobically digested swine manure are approximately 2,900 mg/kg and 1200 mg/kg respectively. These concentrations greatly exceed the regulations for many European countries and are on the borderline for the EPA 503 land application limits. Metals when released into the environment can accumulate to high concentrations and can contaminate soils, groundwater and living organisms. Bioleaching is a process that removes metals from solids or biomass, by acidifying the sludge and therefore solubilizing the metals attached to biosolids. Bioleaching has been successfully applied to many other waste streams but has yet to be applied to anaerobically digested swine manure, which contains both high ammonia and organic compounds both are toxic to sulfur oxidizing bacteria. Traditional physical and chemical methods for metal removal are expensive. Removal of heavy metals by bioleaching has the potential to be highly efficient and economical. A Thiobacilli culture was established by acclimating the bacteria to anaerobically digested swine manure using elemental sulfur. The bioleaching batch tests used this inoculum in the bioleaching experiments. Experiments were completed to test the effects of inoculation, substrate, and solids concentration. ORP, pH, sulfate, nitrate, pathogen reduction, copper and zinc were measured regularly in this study. Results showed that bioleaching is feasible to remove copper and zinc from anaerobically digested swine manure. Inoculation proved to be valuable in increasing the rate of acidification. The results also showed that at high concentrations above 6% TS, the potential for using bioleaching decreases and that higher sulfur concentration yield greater metal removal efficiencies. Using 6% TS and 10,000 mg/l of elemental sulfur in the batch experiments, 94% of Zn and 72% of Cu was solubilized.
Author: Majeti Narasimha Vara Prasad
Publisher: Butterworth-Heinemann
Published: 2019-04-16
Total Pages: 858
ISBN-13: 0128159081
DOWNLOAD EBOOKIndustrial and Municipal Sludge: Emerging Concerns and Scope for Resource Recovery begins with a characterization of the types of sludge and their sources and management strategies. This section is followed by specific chapters that cover Emerging contaminants in sludge (Endocrine disruptors, Pesticides and Pharmaceutical residues, including illicit drugs/controlled substances), Bioleaching of sludge [with an enriched sulfur-oxidizing bacterial community, Recovery of valuable metals (Bioleaching and use of sulfur-oxidizing bacterial community, and Biogas production by continuous thermal hydrolysis and thermophilic anaerobic digestion of waste activated sludge. In addition, the book includes numerous tables and flow diagrams to help users further comprehend the subject matter. - Includes numerous tables and flow diagrams to assist in the comprehension of new and existing sludge treatments and resource recovery technology - Covers biogas production by continuous thermal hydrolysis and thermophilic anaerobic digestion of waste activated sludge - Presents information on the recovery of valuable metals from sludge (bioleaching and the use of a sulfur-oxidizing bacterial community) - Includes opportunities and challenges in the biorefinery-based valorization of pulp and paper sludge
Author: Shabnam Qureshi
Publisher:
Published: 2003
Total Pages: 240
ISBN-13:
DOWNLOAD EBOOKAuthor: Albert Koenig
Publisher:
Published: 1976
Total Pages: 756
ISBN-13:
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