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Effect of Different Acid and Base Potassium Ferrate Pretreatment on Organic Acid Recovery by Anaerobic Digestion of Sludge

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  • Mengjia Tian

    (School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China)

  • Feng Liu

    (School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
    Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, China)

  • Jiawen Guo

    (School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China)

  • Wei Li

    (School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China)

  • Mao Zhang

    (School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China)

  • Xiang Li

    (School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
    Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, China
    State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China)

Abstract

Potassium ferrate has strong oxidation in both acid and alkali environments, which has attracted extensive attention. However, the impact of the pH environment on this coupling process with the goal of resource recovery has not received attention. Under the goal of the efficient recovery of organic acid, the changes of solid–liquid characteristics of sludge after acid and alkaline ferrate pretreatment and during anaerobic digestion were discussed. The results showed that compared with blank control groups, after alkaline ferrate pretreatment, the volatile suspended solids (VSSs) decreased the most, reaching 28.19%. After being pretreated with alkaline ferrate, the sludge showed the maximum VFA accumulation (408.21 COD/g VSS) on the third day of digestion, which was 1.34 times higher than that of the acid ferrate pretreatment. Especially in an alkaline environment, there is no need to add additional alkaline substances to adjust the pH value, and the effect of sludge reduction and acid production is the best.

Suggested Citation

  • Mengjia Tian & Feng Liu & Jiawen Guo & Wei Li & Mao Zhang & Xiang Li, 2022. "Effect of Different Acid and Base Potassium Ferrate Pretreatment on Organic Acid Recovery by Anaerobic Digestion of Sludge," IJERPH, MDPI, vol. 19(22), pages 1-15, November.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:22:p:15093-:d:974366
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    References listed on IDEAS

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    1. Huiru Li & Shaohua Wu & Cheng Du & Yuanyuan Zhong & Chunping Yang, 2020. "Preparation, Performances, and Mechanisms of Microbial Flocculants for Wastewater Treatment," IJERPH, MDPI, vol. 17(4), pages 1-20, February.
    2. Luo, Jingyang & Feng, Leiyu & Zhang, Wei & Li, Xiang & Chen, Hong & Wang, Dongbo & Chen, Yinguang, 2014. "Improved production of short-chain fatty acids from waste activated sludge driven by carbohydrate addition in continuous-flow reactors: Influence of SRT and temperature," Applied Energy, Elsevier, vol. 113(C), pages 51-58.
    3. Geng, Yi-Kun & Yuan, Li & Liu, Tong & Li, Zheng-Hao & Zheng, Xing & Sheng, Guo-Ping, 2020. "Thermal/alkaline pretreatment of waste activated sludge combined with a microbial fuel cell operated at alkaline pH for efficient energy recovery," Applied Energy, Elsevier, vol. 275(C).
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    Cited by:

    1. Li Jiang & Yanru Zhang & Yi Zhu & Zhongliang Huang & Jing Huang & Zijian Wu & Xuan Zhang & Xiaoli Qin & Hui Li, 2023. "Effects of Magnetic Biochar Addition on Mesophilic Anaerobic Digestion of Sewage Sludge," IJERPH, MDPI, vol. 20(5), pages 1-14, February.

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