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Quadrupling the capacity of post aerobic digestion treating anaerobically digested sludge using a moving-bed biofilm (MBBR) configuration.
Wang, Zhiyao; Lu, Xi; Zheng, Min; Hu, Zhetai; Batstone, Damien; Yuan, Zhiguo; Hu, Shihu.
Afiliación
  • Wang Z; Australian Centre for Water and Environmental Biotechnology (ACWEB, formerly AWMC) The University of Queensland St. Lucia Queensland 4072 Australia.
  • Lu X; Australian Centre for Water and Environmental Biotechnology (ACWEB, formerly AWMC) The University of Queensland St. Lucia Queensland 4072 Australia.
  • Zheng M; Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia.
  • Hu Z; Australian Centre for Water and Environmental Biotechnology (ACWEB, formerly AWMC) The University of Queensland St. Lucia Queensland 4072 Australia.
  • Batstone D; Australian Centre for Water and Environmental Biotechnology (ACWEB, formerly AWMC) The University of Queensland St. Lucia Queensland 4072 Australia.
  • Yuan Z; School of Energy and Environment City University of Hong Kong Hong Kong SAR China.
  • Hu S; Australian Centre for Water and Environmental Biotechnology (ACWEB, formerly AWMC) The University of Queensland St. Lucia Queensland 4072 Australia.
Water Res X ; 24: 100240, 2024 Sep 01.
Article en En | MEDLINE | ID: mdl-39193397
ABSTRACT
Wastewater treatment plants produce large amounts of sludge requiring stabilization before safe disposal. Traditional biological stabilization approaches are cost-effective but generally require either an extended retention time (10-40 days), or elevated temperatures (40-80 °C) for effective pathogens inactivation. This study overcomes these limitations via a novel acidic aerobic digestion process, leveraging an acid-tolerant ammonia-oxidizing bacterium (AOB) Candidatus Nitrosoglobus. To retain this novel but slowly growing AOB, we proposed the first-ever application of a classical wastewater configuration-moving bed biofilm reactor (MBBR)-for sludge treatment. The AOB in biofilm maintains acidic pH and high nitrite levels in sludge, generating free nitrous acid in situ to expedite sludge stabilization. This process was tested in two laboratory-scale aerobic digesters processing full-scale anaerobically digested sludge. At an ambient temperature of 20 °C, pathogens were reduced to levels well below the threshold specified for the highest stabilization level (Class A), within a retention time of 3.5 days. A high volatile solids reduction of 27.4 ± 5.2% was achieved. Through drastically accelerating stabilization and enhancing reduction, this process substantially saves capital and operational costs for sludge disposal.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Water Res X Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Water Res X Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido