Evaluation of chromium removal efficiency at varying operating conditions of a novel bioelectrochemical system
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The assessment of chromium removal efficiency (CRE) was studied using experimental trials with variations in operating conditions for evaluating performance efficiency of the Bioelectrochemical system (BES). During the study, maximum CRE of 88.36 ± 8.16% was obtained at cathode pH 2 ± 0.1 from the varied cathode pH (pH 1, 2, 3, 4, 5, 6, 7). With varying reactor temperatures from 25 to 45 °C (25, 30, 35, 40, 45 °C), BES resulted in maximum CRE of 85.93 ± 9.62% at 40 °C. CRE increased from 78.50 ± 5.24 to 88.66 ± 8.40% with an increase in substrate concentration from 500 to 2000 mg/L chemical oxygen demand (COD). CRE decreased from 95.9 ± 2.9 to 89.56 ± 1.74% with an increase in initial chromium concentration from 10 to 100 mg/L. Correlation analysis revealed a positive correlation with COD reduction, COD, and temperature, whereas a negative correlation was observed for pH and initial chromium concentration.
KeywordsBioelectrochemical system Chromium removal efficiency (CRE) pH Temperature Chromium concentration
The authors thank the financial support received from Indian Institute of Technology (Indian School of Mines), Dhanbad under a Junior Research Fellowship scheme funded by Ministry of Human Resource Development (MHRD), Government of India, New Delhi, India for carrying out this study.
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Conflict of interest
The authors declare that they have no conflict of interests. This article does not contain any studies conducted with animals performed by any of the authors.
Research involving human/animal rights
This article does not contain any studies conducted with animals performed by any of the authors.
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