Publications

Peer-reviewed Journal Publications

Google Scholar

  1. Michael De Santi, Ahmed AlSayed, Ciprian Panfilie, Sangeeta Chopra, John Zhang, Xiaohui Jin, Dale Barker, Stephanie Gora, Satinder Brar, Usman Khan (2025) “Exploring Wastewater Treatment Plant Performance Using Unsupervised Learning” Water Science and Technology, In Press.
  2. Amr Mustafa Abdelrahman, Noura Abdelrazec, Ahmed AlSayed, Farokh Laqa Kakar, Chris Muller, Katherine Y. Bell, Elsayed Elbeshbishy (2025) “From process fundamentals to engineering perspectives: A technical review on in-situ biogas upgrading via the hydrogenotrophic methanogenesis pathway” Biomass and Bioenergy, 200, 108043.
  3. Chengpeng Lee, Hau Truong, Khoa Nam Ngo, Ahmed AlSayed, Emily Karen Kin, Stephanie Fuentes, Xiaojue Chen, Haydée De Clippeleir, George Wells (2025) “Achieving biological phosphorus removal and improved settleability in high-rate activated sludge systems” ES&T Engineering, In Press.
  4. Ahmed Elsayed, Farokh Laqa Kakar, Andrew Marcus, Ahmed AlSayed, Mohamed Sherif Zagloul, Chris Muller, Katherine Y Bell, Domenico Santoro, John Norton, Elsayed Elbeshbishy. (2025) “Application of additives for anaerobic digestion intensification: A comprehensive review on improving biogas production and methane yield.” Applied Energy, 320, 118979.
  5. Umme Sharmeen Hyder, Elsayed Elbeshbishy, Joseph McPhee, Ahmed AlSayed, Reshmi Misir (2025) “Chemical conditioning approach to post-treat temperature-phased anaerobic digestate to improve resource recovery, odour reduction and biosolids quality” Environmental Technology, 1-17.
  6. Ahmed Elsayed, Farokh Laqa Kakar, Amr Mustafa Abdelrahman, Nesma Ahmed, Ahmed AlSayed, Mohamed Sherif Zagloul, Chris Muller, Katherine Y Bell, Domenico Santoro, John Norton, Andrew Marcus, Elsayed Elbeshbishy. (2024) “Enhancing anaerobic digestion Efficiency: A comprehensive review on innovative intensification technologies.” Energy Conversion and Management, 320, 118979.
  7. Ahmed AlSayed, Moomen Soliman, and Ahmed Eldyasti. (2024) “Developing an integrative operational strategy to attain high COD redirection and high COD removal using the novel Alternating Activated Adsorption technology for raw strength wastewater.” ES&T Water, 4 (8), 3359-3368.
  8. Mostafa Khalil, Ahmed AlSayed, Ahmed Elsayed, Mohamed Sherif Zaghloul, Katherine Y. Bell, Ahmed Al-Omari, Farokh Laqa Kakar, Dwight Houweling, Domenico Santoro, Jose Porro, Elsayed Elbeshbishy. (2024) “Advances in GHG Emissions Modelling for WRRFs: From State-of-the-Art Methods to Full-Scale Applications” Chemical Engineering Journal, 494, 153053.
  9. Ahmed AlSayed, Moomen Soliman, and Ahmed Eldyasti. (2024) “Manipulating dissolved oxygen concentration to control the partitioning between carbon oxidation and redirection.” Journal of Water process Engineering, 60, 105171.
  10. Umme Sharmeen Hyder, Ahmed AlSayed, Elsayed Elbeshbishy, Joseph McPhee, Reshmi Misir. (2024) “Synergistic Addition of Polymer, Ferric Chloride, and Hydrogen Peroxide to Enhance the Post-Treatment Efficiency of Thermophilic Digestate.” Journal of Environmental Engineering, 150(6), 04024019.
  11. Umme Sharmeen Hyder, Ahmed AlSayed, Elsayed Elbeshbishy. (2024) “Analyzing the effect of combined chemical conditioning and pH adjustment on improving dewatering and phosphorus recovery from anaerobic mesophilic digestate.” Waste and Biomass Valorization, pp.1-15.
  12. Ahmed AlSayed, Moomen Soliman and Ahmed ElDyasti. (2023) “The A-stage process to promote bioflocculation and microbial storage for carbon redirection: the state-of-the-art and future research directions.” Reviews in Environmental Science and Bio/Technology Journal, 22, 1009–1035.
  13. Mostafa Khalil, Ahmed AlSayed, Yang Liu and Peter A. Vanrolleghem. (2023) “Machine learning for modelling N2O emissions from wastewater treatment plants: Aligning model performance, complexity, and interpretability.” Water Research, 120667.
  14. Umme Sharmeen Hyder, Ahmed AlSayed, Elsayed Elbeshbishy, Joseph McPhee, Reshmi Misir. (2023) “Iron and Hydrogen Peroxidation-Induced Post-Treatment Improvement of Municipal Mesophilic Digestate in an Alkaline Environment and Its Impact on Biosolids Quality.” Processes, 11 (9), 2752.
  15. Ahmed AlSayed, Moomen Soliman and Ahmed Eldyasti. (2023) “Mechanistic assessment reveals the significance of HRT and MLSS concentration in balancing carbon diversion and removal in the A-stage process.” Journal of Environmental Management, 334, 117527.
  16. Ahmed AlSayed, Moomen Soliman and Ahmed Eldyasti. (2022) “An alternative A-stage process - investigating the novel Alternating Activated Adsorption (AAA) system for carbon management under different domestic wastewater strengths.” Journal of Environmental Management, 303, 114172.
  17. Ahmed AlSayed, Moomen Soliman, Rahma Shakir, Usman T Khan and Ahmed Eldyasti. (2021) “Data Driven Models as a powerful tool to simulate emerging bioprocesses: An Artificial Neural Network model to describe methanotrophic microbial activity as a proof of concept.” Journal of Environmental Informatics, 38(1) 27-40.
  18. Danelle Bishoff, Ahmed AlSayed, and Ahmed Eldyasti. (2021) “Poly-hydroxy-butyrate (PHB) accumulation in methanotrophic mixed culture enriched for novel biological nitrogen removal.” Journal of Bioscience and Bioengineering, 132 (4), 351-358.
  19. Danelle Bishoff, Ahmed AlSayed, Safyat Hosen, Pranav Menon, Ahmed ElDyasti. (2021) “COD influence on methanotrophic growth and anaerobic digestion of the methanotrophic sludge -Further investigations on the integration of methanotrophs into wastewater treatment plants.” Journal of Environmental Management, 290, 112543.
  20. Ahmed Fergala, Ahmed AlSayed, and Ahmed Eldyasti. (2021) “Utilization of Polyhydroxybutyrate (PHB) as intracellular reducing power for methanol production to alleviate the reliance on external energy sources by Methylocystis hirsuta.” Journal of Environmental Chemical Engineering, 9 (4), 105314.
  21. Ahmed AlSayed, Moomen Soliman, and Ahmed Eldyasti. (2020) “Microbial fuel cells for municipal wastewater treatment: from technology fundamentals into full-scale development” Renewable and Sustainable Energy Reviews, 134, 110367.
  22. Ahmed AlSayed, Moomen Soliman, and Ahmed Eldyasti. (2020) “Anaerobic based water resources recovery facilities” Energies, 13 (14), 3662.
  23. Danelle Bishoff, Ahmed AlSayed, Ahmed Fergala, and Ahmed Eldyasti. (2020) “Redirecting methane for a novel biological nitrogen removal process using methanotrophic mixed culture in a sequential batch reactor” Chemical Engineering Journal, 404, 126487.
  24. Ahmed AlSayed, Ahmed Fergala and Ahmed Eldyasti. (2018) “Sustainable Biogas Mitigation and Value-Added Recovery using Methanotrophs in Wastewater: A Review” Reviews in Environmental Science and Bio/Technology, 17, 351-393.
  25. Ahmed AlSayed, Ahmed Fergala, Saif Khattab, Adham ElSharkawy and Ahmed Eldyasti. (2018) “Optimization of methane bio-hydroxylation using waste activated sludge mixed culture of type I methanotrophs as biocatalyst‏” Applied Energy, 211, 755-763.
  26. Ahmed Fergala, Ahmed AlSayed, Saif Khattab, Megan Ramirez and Ahmed Eldyasti. (2018) “Development of Methane-Utilizing Mixed Cultures for the Production of Polyhydroxyalkanoates (PHAs) from Anaerobic Digester Sludge” Environmental Science & Technology, 52 (21), 12376-12387.
  27. Ahmed AlSayed, Ahmed Fergala and Ahmed Eldyasti. (2018) “Enhancement of the cultivation conditions of mixed culture methanotrophic proteobacteria phylum enriched from waste activated sludge as the first step for value added resources recovery process” Journal of Bioscience and Bioengineering, 127 (5), 602-608.
  28. Ahmed AlSayed, Ahmed Fergala, Saif Khattab and Ahmed Eldyasti. (2018) “Kinetics of type I methanotrophs mixed culture enriched from waste activated sludge‏” Biochemical Engineering Journal, 132, 60-67.
  29. Ahmed AlSayed, Ahmed Fergala and Ahmed Eldyasti. (2018) “Influence of biomass density and food to microorganisms ratio on the mixed culture type I methanotrophs enriched from activated sludge‏” Journal of Environmental Sciences, 70, 87-96.
  30. Ahmed Fergala, Ahmed AlSayed and Ahmed Eldyasti. (2018) “Behavior of methanotrophic bacteria enriched from activated sludge process while utilizing ammonium as their nitrogen source” International Biodeterioration & Biodegradation, 130, 8-16.
  31. Ahmed Fergala, Ahmed AlSayed and Ahmed Eldyasti. (2018) “Factors affecting the selection of PHB accumulating methanotrophs from waste activated sludge while utilizing ammonium as their nitrogen source” Journal of Chemical Technology and Biotechnology, 93 (5), 1359-1369.

 

Selected Conference Proceedings and Presentations

  1. Ahmed AlSayed, Niclas Astrand, Matt Reeve, Jeff Peeters, Sylvain Donnaz. “MABR Breathing Insights: Monitoring Biofilm Health in Full-scale System Based on Exhaust Gas Measurements.” WEFTEC, 2025.
  2. Ahmed AlSayed, Ahmed Elsayed, Mostafa Khalil, Mohamed Sherif Zaghloul, Farokh Laqa Kakar, Katherine Y. Bell, John Willis, Elsayed Elbeshbishy. “Beyond One-Size-Fits-All: How Operational Patterns and Compliance Limits Shape Fugitive GHG Emission Variability in Wastewater Treatment Plants” WEFTEC, 2025.
  3. Ahmed AlSayed, Khoa Nam Ngo, Haydée De Clippeleir, Usman T Khan, George Wells. “Harnessing Machine Learning for Enhanced A-Stage Process Efficiency: A Pioneering Full-Scale Study.” WEFTEC, 2024.
  4. Ahmed AlSayed, Khoa Nam Ngo, Haydée De Clippeleir, Usman T Khan, George Wells. “Confronting Process Complexity and Data Sparsity: Machine Learning for Modelling a Full-Scale A-Stage process.” WEF Innovations in Treatment Technology Conference, 2024.
  5. Ahmed AlSayed, Moomen Soliman and Ahmed Eldyasti. “Manipulating the operational parameters to achieve balance COD diversion, COD removal and phosphorus removal in AAA as a novel A-stage variant.” WEFTEC 2023.
  6. Ahmed AlSayed, Emily Kin, Khoa Nam Ngo, Haydée De Clippeleir, Usman T Khan, George Wells. “Data-Driven modelling to control the high-rate contact stabilization process and address its settleability challenges – A Full Scale Study.” WEF/IWA Innovations in Process Engineering Conference, 2023.
  7. Ahmed AlSayed, Moomen Soliman and Ahmed Eldyasti. “Going beyond carbon redirection - a holistic evaluation of A-stage operational parameters to control the B-stage influent.” WEFTEC, 2022.
  8. Moomen Soliman, Ahmed AlSayed and Ahmed Eldyasti. “Implementation of a novel adaptation strategy to transition from sidestream to mainstream partial nitrification using low DO concentrations.” WEFTEC, 2022.
  9. Ahmed AlSayed, Moomen Soliman and Ahmed Eldyasti. “Understanding the AAA – a promising alternative A-stage process for organics recovery from wastewater.” WEFTEC, 2021.
  10. Ahmed AlSayed, Moomen Soliman and Ahmed Eldyasti. “Starvation time vs Contact time: the impact of hydraulic retention times on the carbon redirection and biosorption capacity of A-stage systems treating raw domestic wastewater” WEFTEC, 2020.
  11. Ahmed Fergala, Danelle Bishoff, Ahmed AlSayed and Ahmed Eldyasti. “Methane-dependent nitrogen removal: Assessing the capability of methanotrophic mixed culture in a sequential batch reactor.” WEFTEC, 2019.
  12. Ahmed AlSayed, Ahmed Fergala, Safyat Hosen, Saif Khattab, Adham ElSharkawy and Ahmed Eldyasti. “Development of an Integrated Methanol Production and Denitrification Processes Using Type I Methanotrophs Enriched from Waste Activated Sludge” WEFTEC, 2018.
  13. Ahmed AlSayed, Ahmed Fergala, Adham ElSharkawy and Ahmed Eldyasti. “Optimization of Methanol Production using waste activated sludge mixed culture of Type I Methanotrophs as biocatalyst.” IWA Water and Development Congress & Exhibition, 2017.