Pharmaceutical wastewater treatment in ceramic separator MFC: Optimisation of operating parameters to improve organic removal and power generation

Somdipta Bagchi, Manaswini Behera
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Abstract

Microbial fuel cell (MFC) can be used to simultaneously treat wastewater and generate energy using microorganisms as biocatalysts. To improve its performance, optimization of the various process variables and determination of effects of their interactions needs to be explored. In the present study, a full factorial statistical experimental design study of 11 runs was conducted to analyse the effect of influent COD (1500–3500 mg/L), pH (5–9) and recirculation ratio (0–1:1) on power density and COD removal efficiency while treating pharmaceutical wastewater. Statistical models were developed using full factorial design (α = 0.05, p < 0.05). The main effects of the all the three factors were found to be significant on COD removal efficiency; however, the interaction effects were found to be insignificant. On the other hand, the main effects as well as the interaction effect of COD and pH were found to be significant on power density. It was predicted that the optimum COD removal efficiency of 68 % and power density of 219.4 mW/m3 can be achieved in an MFC with an influent COD of 1960 mg/L and pH of 8.9 at a recirculation ratio of 0.99.

Abstract Image

陶瓷分离器MFC处理制药废水:优化操作参数以提高有机物去除率和发电量
微生物燃料电池(MFC)可以利用微生物作为生物催化剂同时处理废水和产生能源。为了提高其性能,需要探索各种工艺变量的优化和确定它们相互作用的影响。本研究通过11次运行的全因子统计实验设计研究,分析了进水COD (1500 ~ 3500mg /L)、pH(5 ~ 9)和循环水比(0 ~ 1:1)对制药废水处理过程中功率密度和COD去除率的影响。采用全因子设计建立统计模型(α = 0.05, p <0.05)。3个因素对COD去除率的影响均显著;然而,发现相互作用的影响是不显著的。另一方面,COD和pH的主效应和交互效应对功率密度有显著影响。结果表明,在进水COD为1960 mg/L、pH为8.9、循环比为0.99的MFC条件下,COD去除率为68%,功率密度为219.4 mW/m3。
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CiteScore
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