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In this work, we studied the effect of Burkholderia fungorum strain Bf01 bacterium on three heavy metals bioresorption: cadmium, copper and zinc. The heavy metals bacterium resistance was studied in liquid minimum standard medium, added with increasing metals concentrations. Furthermore, the Burkholderia fungorum strain Bf01 was monitored during its growth for its capacity to reduce high metals. The strain Bf01 showed high Minimal Inhibitory Concentrations about (1500 mg/L, 400 mg/L and 50 mg/L) for Cadmium, Zinc and Copper, respectively. Therefore, it was assumed that Burkholderia fungorum strain Bf01 had a high metals resistance degree especially for cadmium and it exhibited a high adsorption affinity and removal metals from bacterial suspensions. As a result, Burkholderia fungorum strain Bf01 presents an excellent biological tool for heavy metals bioresorption for its efficiency, reliability and low cost.

This work describes crucial steps LED lighting from a simple device microbial fuel cell without membrane, using a domestic wastewater. Firstly, wastewater from activated sludge of Beni Messous was analyzed to be inoculated in the MFC as a source of anodic electroactive biofilm AEB using acetate as substrate. The AEB revealed higher current densities exceeding 100 mA/m2, where, working electrode (WE) polarized at +0.155 V/SCE had given better result compared to −0.155/SCE and +0.3 V/SCE. The microbial analyses had demonstrated a microbial population diversify belonging to bacterial groups already studied and listed in the literature to be electroactive and that Gram negative bacteria were dominated more than Gram positive. Secondly, the performances of a membrane less MFC (ML-MFC) were investigated polarization curves study and demonstrated that ML-MFC had a reactor behavior to produce current. After 150 days of ML-MFC operation, the maximum power and current densities had reached 7.07 and 50 mA/m2, respectively, with an internal resistance of 434 Ω. Through the present study, using Benimessous-STEP wastewater for the renewable energy (bioelectricity) production via a ML-MFC was considered as a feasible, economical, and sustainable process. [ABSTRACT FROM AUTHOR]