Lab class on anoxygenic phototrophic bacteria http://www.microbelibrary.org/edzine/ details.asp?id=2016&Lang= This page describes a set of student laboratory exercises for growing and characterizing phototrophic bacteria. Binary cultivation in photobioreactors http://availabletechnologies.pnl.gov/ technology.asp?id=267 This page describes the development of a photobioreactor for use in cultivat...

Heap bioleaching processes are of increasing interest in the mining industry to recover metals from secondary ores. Recently, it has been proposed to use feedback control to improve the rate of mineral extraction. In this paper we compare two feedback approaches, namely Model Predictive Control (MPC) and Extremum Seeking Control (ESC), to improve copper extraction in a heap bioleaching process....

Particle size, pH and Fe(III) ions affect the process of bioleaching of copper from chalcopyrite ores. In the study presented herein a copper sulfide ore was subjected to bioleaching process using a mixed microbial consortium obtained from a biotrickling filter treating high loads of H2S at different mineral particle size, distinct medium pH and various additional Fe(III) ion concentrations as ...

In this research work, the zinc extraction was investigated, using bioleaching process from a low grade zinc concentrate which was produced from the accumulated flotation tailings. Zinc content was initially upgraded to 11.97% by flotation process. Bioleaching experiments were designed and carried out by a mixed culture of Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans, Leptospir...

The interaction of biofilms with metallic surfaces produces two biologically induced degradation processes materials: microbial corrosion and bioleaching. Both phenomena affect most materials, but in the case noble metals such as gold, which is inert to corrosion, metallophilic bacteria can cause its direct or dissolution. When this process controlled, it be used for hydrometallurgical applicat...

Lithium-ion batteries (LIBs) are extensively used for power storage in most gadgets, electric vehicles (EV), and energy devices. Spent LIBs an excellent source of metals, which can be recycled reused new to reduce environmental impacts. Our current study reports bioleaching-mediated metal recovery from spent nickel-, manganese-, cobalt (NMC)-based at a high solid content, using autotrophic bact...

The present study aims for characterization and classification of five different spent petroleum refinery catalysts followed by metal recovery via bioleaching. nomenclature given to the catalyst (SC) is SC1, SC2, SC3, SC4 SC5 collected from an Indian refinery. All were crushed ground prior their X-Ray Fluorescence chemical composition Diffraction Scanning Electron Microscopy-Energy Dispersive S...