Journal
BIORESOURCE TECHNOLOGY
Volume 144, Issue -, Pages 128-134Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.06.067
Keywords
Sulfate-reducing consortium; Peat moss; Chromium removal; Lead removal; Kinetic parameters
Funding
- National Council for Science and Technology (CONACYT) [201380]
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The effect of pre-treated peat moss on the ability of a sulfate-reducing microbial consortium to remove chromium and lead in solution was evaluated. The most active bacterial community (235.7 mmol H2S/g VSS) was selected from among eight consortia. The peat moss was pre-treated with different HCl concentrations and contact times. The best combination of treatments was 20% HCl for 10 mm. The constant substrate affinity Ks was 740 mg COD/L and the ratio COD/SO42- was 0.71. At pH 5, higher production of biogenic sulfide was observed. The up-flowpacked bed bioreactor operated at a flow of 8.3 mL/min for 180 h to obtain removal efficiency (by sulfate-reducing activity) of 90% lead and 65% chromium. It is important to consider that peat moss is a natural adsorbent that further influences the removal efficiency of metal ions. (C) 2013 Elsevier Ltd. All rights reserved.
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