The Effect of pH and Aluminium to Bacteria Isolated from Aluminium Recycling Industry

Abstract

Aluminium recycling is one of currently growing industries in Indonesia. Abundant amounts of aluminium waste leads to the emergence of new industries. The waste produced from this kind of industry is not well processed yet. Bioremediation using isolated indigenous bacteria is one of the best options from treating the aluminium recycling wastewater. Since biological processes are closely related to the bacterial growth conditions, it is important to understand the effect of pH and aluminium exposure to bacteria. Six potential bacteria strains were obtained from isolation. Vibrio alginolyticus and Brochothrix thermosphacta were shown to be resistant to the aluminium exposure, as well as the acidic conditions. Both types of bacteria were able to survive on acid medium with pH 5. The higher the concentration of aluminium, the slower bacterial growth rate achieved. The MIC value of aluminium for Vibrio alginolyticus was 425 mg/l, Brochothrix thermosphacta was 325 mg/l and Pseudomonas aeruginosa was 200 mg/l.

Biosorption of Chromium by Living Cells of Azotobacter S8, Bacillus subtilis and Pseudomonas aeruginosa using Batch System Reactor

“…This decline was obvious when compared with the growth of the control medium. The growth declining showed the inhibition caused by Cr 3+ in the medium [Kurniawan et al, 2018]. The tested bacteria did not show any growth at the concentration of 250 mg/L and 500 mg/L of CrCl3.…”

“…Bacterial growth rate test provided the information regarding the bacterial growth duration and determined the exponential phase [Kurniawan et al, 2018]. The exponential phase time would then be used as the determinant time for chromium (Cr) removal test.…”

Removal of Aluminium in Contaminated Soil using Locally Isolated Vibrio alginolyticus

“…V. alginolyticus isolates used in this study originated from the aluminium recycling industry area in Jombang District (Kurniawan et al, 2018). Bacterial regrowth was carried out using streaking method (Machmud, 2001).…”

“…Preliminary toxicity tests were carried out by adding 2% v/v of V. alginolyticus to the aluminium-contaminated soil in 250 mL Erlenmeyer (Pyrex, Germany) (Kurniawan et al, 2018). The volume addition of bacteria was 1 mL.…”

“…Vibrio alginolyticus had been reported to have a good potential in removing aluminium from contaminated wastewater (Kurniawan et al, 2018). To the best of our knowledge, a research on the ability of Vibrio alginolyticus in removing aluminium from contaminated soil had not been widely conducted yet.…”