{"id":{"repo_id":"cape-town","oai_identifier":"oai:open.uct.ac.za:11427/5307"},"canonical_url":"https://search.dev.ndltd.org/etd/cape-town/oai:open.uct.ac.za:11427/5307","repository":{"repo_id":"cape-town","name":"University of Cape Town","base_url":"https://open.uct.ac.za/oai/request"},"display":{"title":"Evaluation of the Redostat™ device for the study of ferrous iron biological oxidation kinetics.","abstract":"Heap bioleaching is an established metallurgical route for the recovery of copper from low grade sulphide ores and pretreatment of refractory gold bearing sulphides. However, metal recovery is generally low (80 to 85% copper recovery is achieved in about a year) due to the slow heap bioleaching kinetics. It is believed that more metal values can be recovered in a shorter timeframe, if the kinetics of ferrous iron biological oxidation can be accelerated. This requires careful study of the bio-oxidation kinetics under heap-like conditions. Two different experimental methods are commonly used for the study of ferrous iron biological oxidation kinetics, namely batch and continuous culture techniques. However, the continuously changing conditions in batch culture and the slowness and bacterial wash out in continuous culture are significant weaknesses for these experimental methods. This work has evaluated the Redostat™ device for faster and controlled ferrous iron biological oxidation kinetics studies. The Redostat™ device offers controlled conditions as in continuous culture but the speed and concentration range of batch culture.","abstract_html":"Heap bioleaching is an established metallurgical route for the recovery of copper from low grade sulphide ores and pretreatment of refractory gold bearing sulphides. However, metal recovery is generally low (80 to 85% copper recovery is achieved in about a year) due to the slow heap bioleaching kinetics. It is believed that more metal values can be recovered in a shorter timeframe, if the kinetics of ferrous iron biological oxidation can be accelerated. This requires careful study of the bio-oxidation kinetics under heap-like conditions. Two different experimental methods are commonly used for the study of ferrous iron biological oxidation kinetics, namely batch and continuous culture techniques. However, the continuously changing conditions in batch culture and the slowness and bacterial wash out in continuous culture are significant weaknesses for these experimental methods. This work has evaluated the Redostat™ device for faster and controlled ferrous iron biological oxidation kinetics studies. The Redostat™ device offers controlled conditions as in continuous culture but the speed and concentration range of batch culture.","abstract_has_math":false,"creators":["Kazadi, Thierry Kamunga"],"institution":"Centre for Bioprocess Engineering Research","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Petersen, Jochen"],"committee_chairs":[],"committee_members":[],"year":2007,"date_issued":"2007","date_published":"2007","updated_at":"2026-07-22T22:23:49Z","subjects":[],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/11427/5307","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Petersen, Jochen"]},{"key":"dc:creator","label":"Author","values":["Kazadi, Thierry Kamunga"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2014-07-31T11:09:07Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2014-07-31T11:09:07Z"]},{"key":"dc:date.issued","label":"Date","values":["2007"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["Centre for Bioprocess Engineering Research"]},{"key":"dc:publisher.institution","label":"Dc Publisher Institution","values":["University of Cape Town"]},{"key":"dc:type","label":"Dc Type","values":["Master Thesis"]},{"key":"dc:type.qualificationlevel","label":"Dc Type Qualificationlevel","values":["Masters"]},{"key":"dc:type.qualificationname","label":"Dc Type Qualificationname","values":["MSc"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/11427/5307"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Includes bibliographical references (leaves 85-89)."]},{"key":"dc:description.abstract","label":"Abstract","values":["Heap bioleaching is an established metallurgical route for the recovery of copper from low grade sulphide ores and pretreatment of refractory gold bearing sulphides. However, metal recovery is generally low (80 to 85% copper recovery is achieved in about a year) due to the slow heap bioleaching kinetics. It is believed that more metal values can be recovered in a shorter timeframe, if the kinetics of ferrous iron biological oxidation can be accelerated. This requires careful study of the bio-oxidation kinetics under heap-like conditions. Two different experimental methods are commonly used for the study of ferrous iron biological oxidation kinetics, namely batch and continuous culture techniques. However, the continuously changing conditions in batch culture and the slowness and bacterial wash out in continuous culture are significant weaknesses for these experimental methods. This work has evaluated the Redostat™ device for faster and controlled ferrous iron biological oxidation kinetics studies. The Redostat™ device offers controlled conditions as in continuous culture but the speed and concentration range of batch culture."]},{"key":"dc:title","label":"Title","values":["Evaluation of the Redostat™ device for the study of ferrous iron biological oxidation kinetics."]}]}],"canonical_facts":{"dc:contributor.advisor":["Petersen, Jochen"],"dc:creator":["Kazadi, Thierry Kamunga"],"dc:date.accessioned":["2014-07-31T11:09:07Z"],"dc:date.available":["2014-07-31T11:09:07Z"],"dc:date.issued":["2007"],"dc:description":["Includes bibliographical references (leaves 85-89)."],"dc:description.abstract":["Heap bioleaching is an established metallurgical route for the recovery of copper from low grade sulphide ores and pretreatment of refractory gold bearing sulphides. However, metal recovery is generally low (80 to 85% copper recovery is achieved in about a year) due to the slow heap bioleaching kinetics. It is believed that more metal values can be recovered in a shorter timeframe, if the kinetics of ferrous iron biological oxidation can be accelerated. This requires careful study of the bio-oxidation kinetics under heap-like conditions. Two different experimental methods are commonly used for the study of ferrous iron biological oxidation kinetics, namely batch and continuous culture techniques. However, the continuously changing conditions in batch culture and the slowness and bacterial wash out in continuous culture are significant weaknesses for these experimental methods. This work has evaluated the Redostat™ device for faster and controlled ferrous iron biological oxidation kinetics studies. The Redostat™ device offers controlled conditions as in continuous culture but the speed and concentration range of batch culture."],"dc:identifier.uri":["http://hdl.handle.net/11427/5307"],"dc:language.iso":["eng"],"dc:publisher.department":["Centre for Bioprocess Engineering Research"],"dc:publisher.institution":["University of Cape Town"],"dc:title":["Evaluation of the Redostat™ device for the study of ferrous iron biological oxidation kinetics."],"dc:type":["Master Thesis"],"dc:type.qualificationlevel":["Masters"],"dc:type.qualificationname":["MSc"]},"updated_at":"2026-07-22T22:23:49Z"}