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A Case Study of Swine Wastewater Treatment via Electrochemical Oxidation by Ti 4 O 7 Anode

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  • Hongyou Wan

    (School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
    Research Centre of Engineering and Technology for Synergetic Control of Environmental Pollution and Carbon Emissions of Henan Province, Zhengzhou University, Zhengzhou 450001, China)

  • Ruifeng Wang

    (School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
    College of Resources and Environmental Science, Henan Agricultural University, Zhengzhou 450002, China)

  • Beibei Wang

    (College of Resources and Environmental Science, Henan Agricultural University, Zhengzhou 450002, China)

  • Kehao Zhang

    (College of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China)

  • Huanhuan Shi

    (School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
    Research Centre of Engineering and Technology for Synergetic Control of Environmental Pollution and Carbon Emissions of Henan Province, Zhengzhou University, Zhengzhou 450001, China)

  • Hailong Wang

    (College of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China)

Abstract

With the rapid development of breeding industry, the efficient treatment of dramatically increasing swine wastewater is gradually becoming urgent. In particular, the development of application technologies suitable for the relatively small piggeries is critical due to the time cost and space requirements of conventional biological methods. In this study, Electrochemical oxidation (EO) was selected to systematically explore the treatment performance of three different swine wastewaters by Ti 4 O 7 anode. It was observed that the colors changed from dark brown to light yellow after 60 min treatment at 50 mA/cm 2 , and the removal rates of turbidity and suspended solids ranged from 89.36% to 93.65% and 81.31% to 92.55%, respectively. The chemical oxygen demand (COD), ammonia nitrogen (NH 3 -N) and total phosphorus (TP) of all the three swine wastewaters were simultaneously removed to a very low concentration in 120 min, especially for sample III, 61 ± 9 mg/L of COD, 6.6 ± 0.4 mg/L of NH 3 -N and 5.7 ± 1.1 mg/L of TP, which met the Discharge Standard of Pollutants for Livestock and Poultry Breeding (GB 18596-2001). Moreover, 70.93%–85.37% mineralization rates were also achieved in 120 min, confirming that EO treatment by Ti 4 O 7 could efficiently remove the organic matters in wastewater. Excitation–emission matrix (EEM) and UV-vis spectrum characterization results further proved that aromatic compounds and macromolecules in wastewater were rapidly removed, which played important roles in the mineralization processes. The findings here provided an efficient and environment-friendly technology for swine wastewater treatment.

Suggested Citation

  • Hongyou Wan & Ruifeng Wang & Beibei Wang & Kehao Zhang & Huanhuan Shi & Hailong Wang, 2022. "A Case Study of Swine Wastewater Treatment via Electrochemical Oxidation by Ti 4 O 7 Anode," IJERPH, MDPI, vol. 19(21), pages 1-11, October.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:21:p:13840-:d:952084
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    References listed on IDEAS

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    1. Jiachao Yao & Yu Mei & Guanghua Xia & Yin Lu & Dongmei Xu & Nabo Sun & Jiade Wang & Jun Chen, 2019. "Process Optimization of Electrochemical Oxidation of Ammonia to Nitrogen for Actual Dyeing Wastewater Treatment," IJERPH, MDPI, vol. 16(16), pages 1-13, August.
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