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Optimization of electrocoagulation process for treatment of rice grain-based biodigester distillery effluent using surface response methodology approach

  • Savita Dubey , Nitesh Parmar ORCID logo , Chhaya Rekhate and Abhinesh Kumar Prajapati EMAIL logo
Published/Copyright: May 6, 2022
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International Journal of Chemical Reactor Engineering
From the journal International Journal of Chemical Reactor Engineering Volume 20 Issue 12

Abstract

Distillery industries are the most water-consuming industries discharging a large amount of wastewater that contain a high organic load. Hence it is first treated in biodigester where significant organics reduces (50–60%) and the outcome of biodigester is commonly known as biodigester effluent (BDE). The present study is an attempt to treat BDE in terms of COD and color removal using a batch electrocoagulation reactor (ECR) where stainless steel (SS) is used as an electrode. To optimize the four independent parameters namely initial pH (pHi: 3.5–9.5), current density (j: 49.5–247 A/m2), electrode gap (g: 1.2–3.2 cm), and reaction time (t: 20–100 min) on the color and COD reduction efficiency, a central composite design (CCD) experiment is applied to evaluate the individual and interactive effects of these parameters. The high coefficients of determination for color (R2 = 0.9989) and COD (R2 = 0.9981) were obtained by analysis of variance (ANOVA) between the experimental data and the predicted data using a second-order regression model. At the optimum condition color and COD removal of 81.4 and 91.9%, respectively, were observed. A material balance of SS has also been incorporated.

Keywords: biodigester effluent; central composite design (CCD); COD reduction; electrocoagulation; iron electrode; material balance
Corresponding author: Abhinesh Kumar Prajapati, Department of Chemical Engineering, IPSA, Institute of Engineering and Science, Indore 452012, India, E-mail:

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: None declared.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2021-10-08
Accepted: 2022-04-20
Published Online: 2022-05-06

© 2022 Walter de Gruyter GmbH, Berlin/Boston

Articles in the same Issue

  1. Frontmatter
  2. Articles
  3. Performance of Pd catalyst supported on trimetallic nanohybrid Zr–Al–La in hydrogenation of ethylanthraquinone
  4. Enhanced degradation of Rhodamine B dye by Fenton/peracetic acid and photo-Fenton/peracetic acid processes
  5. Optimization of electrocoagulation process for treatment of rice grain-based biodigester distillery effluent using surface response methodology approach
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https://doi.org/10.1515/ijcre-2021-0253
Keywords for this article
biodigester effluent; central composite design (CCD); COD reduction; electrocoagulation; iron electrode; material balance

Articles in the same Issue

  1. Frontmatter
  2. Articles
  3. Performance of Pd catalyst supported on trimetallic nanohybrid Zr–Al–La in hydrogenation of ethylanthraquinone
  4. Enhanced degradation of Rhodamine B dye by Fenton/peracetic acid and photo-Fenton/peracetic acid processes
  5. Optimization of electrocoagulation process for treatment of rice grain-based biodigester distillery effluent using surface response methodology approach
  6. Numerical simulation of collision removal of inclusion in swirling flow tundish
  7. Fabrication of superhydrophobic and flame-retardant polyethylene terephthalate fabric through a fluorine-free layer-by-layer technique
  8. Investigation on the atomization characteristics and structure parameters of alcohol-based fuel in small stove
  9. Metal-exchanged phosphotungstate nanoparticles with improved acidity as the catalyst for esterification of glycerol with acetic acid
  10. Synergistic effects of hierarchical porous structure, acidity and nickel metal for hydro-liquefaction of thermal extracts from lignite over Ni/ZSM-5
  11. A novel equilibrium optimized double-loop control scheme for unstable and integrating chemical processes involving dead time
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