AI Article Synopsis
- A new treatment method called the intimately coupled catalytic ozonation and biodegradation (ICOB) reactor was developed to address the challenges of treating coking wastewater.
- The ICOB system significantly improved the removal rates of contaminants like copper, iron, and color, outperforming traditional biodegradation methods.
- It also boosted the presence of beneficial microorganisms that can break down harmful substances, leading to higher mineralization rates and reduced toxicity in the treated wastewater.
Article Abstract
Considering the challenges for both single and traditional two-stage treatments, advanced oxidation and biodegradation, in the treatment of actual coking wastewater, an intimately coupled catalytic ozonation and biodegradation (ICOB) reactor was developed. In this study, ICOB treatment significantly enhanced the removal of Cu, Fe, and color by 39 %, 45 %, and 52 %, respectively, outperforming biodegradation. Catalytic ozonation effectively breaking down unsaturated organic substances and high-molecular-weight dissolved organic matter into smaller, more biodegradable molecules. Compared with biodegradation, the ICOB system significantly increased the abundances of Pseudomonas, Sphingopyxis, and Brevundimonas by ∼ 96 %, ∼67 %, and ∼ 85 %, respectively. These microorganisms, possessing genes for degrading phenol, aromatic compounds, polycyclic aromatics, and sulfur metabolism, further enhanced the mineralization of intermediates. Consequently, the ICOB system outperformed biodegradation and catalytic ozonation treatments, exhibiting chemical oxygen demand removal rate of ∼ 58 % and toxicity reduction of ∼ 47 %. Overall, the ICOB treatment showcases promise for practical engineering applications in coking wastewater treatment.
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| http://dx.doi.org/10.1016/j.biortech.2024.131154 | DOI Listing |
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