Optimization of pollutants removal from anaerobically digested dairy wastewater by electro-oxidation process: a response surface methodology modeling and validation

The release of anaerobically digested dairy wastewater (ANDDW) without a treatment can lead to severe environmental pollution, prompting the exploration of effective and sustainable treatment methods. Amidst various wastewater treatment approaches, the electro-oxidation (EO) process is considered as...

Full description

Saved in:
Bibliographic Details
Published in:Journal of applied electrochemistry 2024, Vol.54 (11), p.2415-2436
Main Authors: Das, Ashish Kumar, Reza, Arif, Chen, Lide
Format: Article
Language:English
Subjects:
Ammonia
Anaerobic processes
Anaerobic treatment
Cathodic cleaning
Chemical oxygen demand
Chemistry
Chemistry and Materials Science
Correlation coefficients
Current density
Electrochemistry
Electrolytes
Industrial Chemistry/Chemical Engineering
Lead oxides
Nitrogen
Optimization
Oxidation
Physical Chemistry
Pollutants
Research Article
Response surface methodology
Stainless steels
Wastewater treatment
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The release of anaerobically digested dairy wastewater (ANDDW) without a treatment can lead to severe environmental pollution, prompting the exploration of effective and sustainable treatment methods. Amidst various wastewater treatment approaches, the electro-oxidation (EO) process is considered as a promising, clean, and adaptable solution. In this study, the major operational parameters viz. current density, electrolyte concentration, treatment time, and mixing speed of an EO comprising Ti/PbO 2 anode and stainless-steel cathode, were optimized using response surface methodology (RSM) for efficient removal of chemical oxygen demand (COD), ammonia nitrogen (NH 3 -N), total phosphorus (TP), orthophosphate (OP), total nitrogen (TN), and total Kjeldahl nitrogen (TKN) from ANDDW. Optimal conditions were identified as a current density of 90 mA cm −2 , 0.08% electrolyte concentration, 180 min treatment time, and 400 rpm mixing speed. Under the optimum conditions, the COD, NH 3 -N, TP, OP, TN, and TKN removal efficiencies were 78.36, 63.93, 87.41, 92.39, 67.01, and 81.42%, respectively. Furthermore, the reaction rate followed the first-order kinetic model for the pollutants removal with correlation coefficients (R 2 ) close to 1. The findings highlight the potential of using the EO process to treat high pollutant-laden ANDDW and encourage further studies to confirm the corresponding outcomes on a pilot scale. Graphical abstract
ISSN:0021-891X
1572-8838
DOI:10.1007/s10800-024-02113-z