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Impact of Alum Water Treatment Residues on the Methanogenic Activity in the Digestion of Primary Domestic Wastewater Sludge

Author

Listed:
  • Paulo Scalize

    (School of Environmental and Civil Engineering, Federal University of Goiás, Goiânia 74000-000, GO, Brazil)

  • Antonio Albuquerque

    (Department of Civil Engineering and Architecture, FibEnTech, GeoBioTec, University of Beira Interior, 6200-024 Covilha, Portugal)

  • Luiz Di Bernardo

    (Hidrosan Engenharia and Department of Hydraulic and Sanitation, School of Engineering of São Carlos, University of São Paulo, São Paulo 01000-000, SP, Brazil)

Abstract

The effect of adding alum water treatment residues (WTR) on the methanogenic activity in the digestion of primary domestic wastewater sludge was evaluated through laboratory experiments in sedimentation columns, using total suspended solids (TSS) concentrations from 0.37 to 1.23 g/L. The addition of WTR to primary clarifiers can benefit its effluent water quality in terms of colour, turbidity, chemical oxygen demand (COD), and TSS. However, the presence of WTR can negatively influence the production of methane gas during organic sludge digestion in primary clarifiers, for concentrations of TSS between 14.43 and 25.23 g/L and of VSS between 10.2 and 11.85 g/L. The activity of the Methanothrix sp., curved bacilli, methanococci, and Methanosarcina sp. decreases considerably after 16 days of anaerobic digestion, and methane production seems to only be associated with fluorescent methanogenic bacilli.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:16:p:8783-:d:609390
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    References listed on IDEAS

    as
    1. 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.
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    Cited by:

    1. Sanjay Shinde & Anteneh Mesfin Yeneneh & Tahereh Jafary & Khadija Al Balushi & Eugene Hong & Tushar Kanti Sen & Parveen Fatemeh Rupani, 2023. "Metal Cation and Surfactant-Assisted Flocculation for Enhanced Dewatering of Anaerobically Digested Sludge," Sustainability, MDPI, vol. 15(4), pages 1-16, February.

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