• Summary

    Anaerobic digestion is used widely for wet residual biomass treatment under four stages: hydrolysis, acidogenesis, acetogenesis, and methanogenesis, through various groups of microorganisms. The organic matter undergoes several transformations involving a series of complex biological degradation pathways to give by-products like H2, CO2, and acetate, which will be transformed, in the end, into CH4 and CO2. Anaerobic digesters can be configured as one-stage, two-stage or multi-stage reactors in which the hydrolysis/acidogenesis and acetogenesis/methanogenesis steps occur in either the same or separated digesters. In many works, authors have shown that separating the digesters makes the process easier to control and makes it possible to separately optimize the operational and environmental conditions for hydrolysis/acidogenesis and methanogenesis processes to enhance the overall reaction rate and biogas yields. This project will address the optimization of the multi-stage digester mode for the anaerobic co-digestion of high moisture waste streams, Organic Fraction of Municipal Solid Waste (OFMSW) and wastewater sludge.  Two connected reactors will be used during this study. In the first reactor, acid fermentation of the studied substrates will be carried out with a pH of around 5 to 6. In this step, hydrogen production will be targeted and many parameters such as carbon to nitrogen ratio, total and volatile solids, nutrients and organic loading rate will be varied to have the best production yield. In the second reactor, anaerobic digestion to produce biomethane will take place with a process control pH between 6 and 8. In the two stages, the addition of carbon nanoparticles will be investigated, and the effect on the biogas production yield will be monitored as a function of the added concentrations. A monitoring and control system of the production way: H2 or CH4 production, based on the pH regulation, will be proposed in this study. This system allows the modification of the solid and hydraulic retention times, and therefore the percentages of H2 and CH4 produced over time. The ultimate goal is to have a specific production of one of these two products or both at the same time needs for a product or another as needed. Furthermore, the need of integrating post-treatment for the stabilization of the digestate before spreading will be investigated.

  • Achievements


  • List of Publications from the Project


  • Partners

  • Project Members

  • Project Leaders

  • Project PI

    Shereen Ali El-Agroody

  • Faculty

    Faculty of Engineering

  • Research Group

    Egypt Solid Waste Management Center of Excellence

  • Funding Agency

    Academy of Scientific Research & Technology (ASRT)

  • Funding Program

    IMHOTEP Egyptian-French

  • Start Date

    2022-01-01

  • End Date

    2023-12-31

  • Project website