Search results for: anammox-based systems

• The role of the combined nitrogen-sulfur-carbon cycles for efficient performance of anammox-based systems

  Publication

  • D. Derwis
  • H. Al-Hazmi
  • J. Majtacz
  • P. Kowal
  • S. Ciesielski
  • J. Mąkinia

  - SCIENCE OF THE TOTAL ENVIRONMENT - Year 2024

  The combined anammox/mixotrophic denitrification process was conducted in two granular sequencing batch reactors (SBRs) during a 200-day operation. Both reactors were fed with synthetic medium, but SBR2 was enriched with additional sulfate (SO4 2 ) which influenced sulfate reduction ammonium oxidation (SRAO) and heterotrophic reduction of SO4 2 by sulfate reducing bacteria. It was hypothesized that the addition of SO4 2 could...

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• KNOWLEDGE-BASED SYSTEMS

  Journals

  ISSN: 0950-7051 , eISSN: 1872-7409

• Integrating conventional nitrogen removal with anammox in wastewater treatment systems: Microbial metabolism, sustainability and challenges

  Publication

  • H. Al-Hazmi
  • G. K.hassan
  • M. Maktabifard
  • D. Derwis
  • J. Majtacz
  • J. Mąkinia

  - ENVIRONMENTAL RESEARCH - Year 2022

  The various forms of nitrogen (N), including ammonium (NH4+), nitrite (NO2−), and nitrate (NO3−), present in wastewaters can create critical biotic stress and can lead to hazardous phenomena that cause imbalances in biological diversity. Thus, biological nitrogen removal (BNR) from wastewaters is considered to be imperatively urgent. Therefore, anammox-based systems, i.e. partial nitrification and anaerobic ammonium oxidation (PN/anammox)...

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• Removal of nitrogen from wastewater: Unsolved problems and possible solutions with partial denitrification/anammox systems

  Publication

  • J. Majtacz
  • H. Al-Hazmi
  • X. Xu
  • G. Piechota
  • X. Li
  • G. Kumar
  • T. M. Aminabhavi
  • M. Saeb
  • M. Badawi
  • J. Mąkinia

  - CHEMICAL ENGINEERING JOURNAL - Year 2024

  Abstract Nitrate (NO3−) is more stable than ammonia (NH4+) and nitrite (NO2−) among the majority of emerging pollutants in wastewater that can harm the ecosystem by depleting oxygen and water quality, thereby posing environmental and human health risks. Despite anaerobic ammonium oxidation (anammox) being a common method for nitrogen (N) removal from wastewater, it leaves behind residual NO3− of around 11 %. Maintaining the stability...

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• Sustainable nitrogen removal in anammox-mediated systems: Microbial metabolic pathways, operational conditions and mathematical modelling

  Publication

  • H. Al-Hazmi
  • L. Xi
  • D. Derwis
  • J. Majtacz
  • M. Badawi
  • J. Mąkinia

  - SCIENCE OF THE TOTAL ENVIRONMENT - Year 2023

  Anammox-mediated systems have attracted considerable attention as alternative cost-effective technologies for sustainable nitrogen (N) removal from wastewater. This review comprehensively highlights the importance of understanding microbial metabolism in anammox-mediated systems under crucial operation parameters, indicating the potentially wide applications for the sustainable treatment of N-containing wastewater. The partial...

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• Model-Based Evaluation of N2O Production Pathways in the Anammox-Enriched Granular Sludge Cultivated in a Sequencing Batch Reactor

  Publication

  • X. Lu
  • T. D.
  • H. Al-Hazmi
  • J. Majtacz
  • Q. Zhou
  • L. Xie
  • J. Mąkinia

  - ENVIRONMENTAL SCIENCE & TECHNOLOGY - Year 2018

  A mechanistic model was developed as an extension of the Activated Sludge Model No. 1 to describe three nitrous oxide (N2O) production pathways in a laboratory-scale anammox-enriched granular sequencing batch reactor. Heterotrophic denitrification and two processes mediated by ammonia oxidizing bacteria (AOB), that is, ammonia (NH4+) oxidation via hydroxylamine (NH2OH) and autotrophic denitrification, were considered. A systematic...

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• Model of Volunteer Based Systems.

  Publication

  • M. Matuszek

  - Year 2013

  There are two main approaches to processing tasks requiring high amounts of computational power. One approach is using clusters of mostly identical hardware, placed in dedicated locations. The other approach is outsourcing computing resources from large numbers of volunteers connected to the Internet. This chapter attempts to formulate a mathematical model of the volunteer based approach to distributed computations and apply it...

• Modeling Volunteer Based Systems

  Publication

  • M. Matuszek

  - Year 2016

  There are two main approaches to processing tasks requiring high amounts of computational power. One approach is using clusters of mostly identical hardware, placed in dedicated locations [1, 2, 3]. The other approach is outsourcing computing resources from large numbers of volunteers connected to the Internet [7]. This chapter presents an application of a mathematical model of the volunteer computing presented in Volume 1 of this...

• Utilising IT-based systems in regatta management

  Publication

  • P. Oleksiak

  - Year 2016

  The development and increasing accessibility of new technologies has brought changes to the management of sailing regattas. Organisational and promotional difficulties faced by the organisers are now being tackled with software-based systems. This article considers various information technology (IT) systems, designed to support the organisation and presentation of sailing regattas and explores how they are perceived by regatta...

• International Journal of Critical Computer-Based Systems

  Journals

  ISSN: 1757-8779