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Effect of Adding Drinking Water Treatment Sludge on Excess Activated Sludge Digestion Process

Author

Listed:
  • Yanxia Wu

    (College of Urban Construction, Nanjing Tech University, Nanjing 211816, China)

  • Haixia Du

    (College of Urban Construction, Nanjing Tech University, Nanjing 211816, China)

  • Fusheng Li

    (River Basin Research Center, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan)

  • Haoning Su

    (Graduate School of Natural Science and Technology, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan)

  • Sartaj Ahmad Bhat

    (River Basin Research Center, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan)

  • Hudori Hudori

    (Graduate School of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan)

  • Maulana Yusup Rosadi

    (Graduate School of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan)

  • Faisal Arsyad

    (Graduate School of Natural Science and Technology, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan)

  • Yanqiu Lu

    (College of Urban Construction, Nanjing Tech University, Nanjing 211816, China)

  • Huifang Wu

    (College of Urban Construction, Nanjing Tech University, Nanjing 211816, China)

Abstract

Drinking water treatment sludge (DWTS) is a waste by-product from water treatment plants where aluminum and iron salts are the most commonly used coagulants. DWTS was reused to investigate the effects of DWTS on the digestion liquid quality and microorganism activity of excess activated sludge (EAS). DWTS with four suspended solid (SS) concentrations (0%, 2%, 5% and 10%) was added to EAS which was sampled during aerobic and anaerobic digestion processes, then batch tests were carried out which followed the coagulation-flocculation process. It was found that DWTS can improve total dissolved nitrogen (TDN) and dissolved phosphorus (DP) removal efficiencies for anaerobic EAS. The highest removal efficiency of TDN (29.97%) as well as DP (55.38%) was observed when DWTS dosage was SS = 10%. The release of dissolved organic matter (DOM) by DWTS could increase dissolved organic carbon (DOC) concentration and lead to the accumulation of non-biodegradable humic acid-like substance in aerobic and anaerobic digestion liquid. The dehydrogenase activity (DHA) values of anaerobic EAS were higher than aerobic EAS. DWTS could reduce DHA for both EAS. These results indicate that potential risk of release of DOM should be considered when reusing DWTS in future research.

Suggested Citation

  • Yanxia Wu & Haixia Du & Fusheng Li & Haoning Su & Sartaj Ahmad Bhat & Hudori Hudori & Maulana Yusup Rosadi & Faisal Arsyad & Yanqiu Lu & Huifang Wu, 2020. "Effect of Adding Drinking Water Treatment Sludge on Excess Activated Sludge Digestion Process," Sustainability, MDPI, vol. 12(17), pages 1-15, August.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:17:p:6953-:d:404542
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    References listed on IDEAS

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    1. Alok Suman & Tarique Ahmad & Kafeel Ahmad, 2018. "Dairy wastewater treatment using water treatment sludge as coagulant: a novel treatment approach," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 20(4), pages 1615-1625, August.
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    Cited by:

    1. Paulo Scalize & Antonio Albuquerque & Luiz Di Bernardo, 2021. "Impact of Alum Water Treatment Residues on the Methanogenic Activity in the Digestion of Primary Domestic Wastewater Sludge," Sustainability, MDPI, vol. 13(16), pages 1-12, August.

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