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- Gebert, J. (author), Kirichek, Alex (author), de Lucas Pardo, Miguel (author), Amman, Baerbel (author), Ohle, Nino (author) abstract 2023
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- Kirichek, Alex (author), Bampatzeliou, A. (author), Gebert, J. (author), Chassagne, C. (author), Ohle, Nino (author), Schmekel, Uli (author) abstract 2023
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- Chamanmotlagh, F.C. (author), Gebert, J. (author), Kirichek, Alex (author) abstract 2023
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- Gebert, J. (author), Zander, F. (author), Ohle, Nino (author) abstract 2023
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Zander, F. (author), Comans, R.N.J. (author), Gebert, J. (author)Degradability of organic matter in river sediments differs in relation to origin and age. In order to explain previously observed spatial patterns of organic matter degradability and stabilization, this study investigated sediment organic matter (SOM) properties along a tidal Elbe river transect using dissolved organic matter (DOM) fractions,...journal article 2023
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Buisma-Yi, S.C. (author), Heijbroek, A.C. (author), Cutz, L. (author), Pillay, S. (author), de Jong, W. (author), Abeel, T.E.P.M.F. (author), Gebert, J. (author)Application of biochar to landfill cover soils can purportedly improve methane (CH4) oxidation rates, but understanding the combined effects of soil texture, compaction, and biochar on the activity and composition of the methanotrophs is limited. The amendment of wood biochar on two differently textured landfill cover soils at three compaction...journal article 2023
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Heimovaara, T.J. (author), Gebert, J. (author), Kanen, A.C. (author), Meza Ramos, P.N. (author)In-situ stabilization of waste bodies can be achieved by the infiltration of water or recirculation of leachate into the landfill, which is thought to enhance the microbial degradation of waste organics by (re-)moisturizing dry zones and flushing out metabolic products of organic matter decay. The success of in-situ stabilization should reflect...conference paper 2023
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Buisma-Yi, S.C. (author), Meza Ramos, P.N. (author), Oonk, Hans (author), Gebert, J. (author)In the Netherlands, three full-scale pilots have been in operation for approximately five years to understand the effects of leachate recirculation or aeration on waste stabilisation. This study employs the ratio of N2 to Ar in the landfill gas in comparison to the ratio in atmospheric air to derive the share of N2 that originates from...conference paper 2023
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Andrade Corona, C.F. (author), Dieudonné, A.A.M. (author), Gebert, J. (author), Heimovaara, T.J. (author)Nitrogen undergoes multiple biogeochemical transformations during waste degradation, which depend on speciation, prevailing geochemical boundary conditions, and waste surface properties. This study developed a waste biodegradation model with high flexibility in accommodating reaction pathways to assess different process dynamics. The model was...conference paper 2023
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Gebert, J. (author), Meza Ramos, P.N. (author), Cruz Osorio, C.R. (author), Lammen, J.K. (author)This study quantifies the share of aerobically produced carbon (aeration efficiency) during six years of a full scale landfill aeration project using the balance between methane and carbon dioxide in the bulk extracted gas. Aeration was realized by overextraction. Aeration enhanced carbon release in comparison to the anaerobic ‘base case’, as...conference paper 2023
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Rees-White, T. (author), Feenstra, Merel (author), Kanen, A.C. (author), Beaven, R.P. (author), Gebert, J. (author)The recirculation and infiltration of leachate in landfills may be carried out to facilitate the flushing of contaminants and accelerate the stabilisation of waste. Flushing contaminants through recirculation relies on the movement of fluids through the landfill body to basal drains, which will predominantly be driven by gravity. Leachate...conference paper 2023
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Duarte Campos, L.A. (author), Rees-White, T. (author), Beaven, R.P. (author), Cruz Osorio, C.R. (author), Lammen, J.K. (author), Gebert, J. (author)This paper presents the preliminary results of field trials conducted to investigate the air permeability of waste at the Braambergen landfill located near the city of Almere, the Netherlands. Pressure variations were monitored in surrounding wells during air extraction tests using differential pressure transducers. The magnitude of the pressure...conference paper 2023
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Shakeel, A. (author), Zander, F. (author), Gebert, J. (author), Chassagne, C. (author), Kirichek, Alex (author)The presence of clay-organic flocs in cohesive mud results in a complex rheological behavior of mud, including viscoelasticity, shear-thinning, thixotropy and two-step yielding. In this study, the effect of microbial degradation of organic matter on the rheological properties of mud samples, collected from different ports, was examined. The mud...journal article 2022
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Kirichek, Alex (author), Shakeel, A. (author), Chassagne, C. (author), Gebert, J. (author)In some ports and waterways, hindered (delayed) settling of mud suspended in the water phase can be detected. Hindered settling phenomena are typically linked to a combination of sediment properties, suspended sediment concentration or density, hydrodynamic conditions, presence or absence of organic bridging between mud particles and the...conference paper 2022
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Gebert, J. (author), van Rhees, Floris (author), Shakeel, A. (author), Kirichek, Alex (author), Habdank, Janis (author), Amman, Baerbel (author)Maintenance of the nautical depth in the seaport of Emden, Germany, is achieved by re-circulation of fluid mud using a trailing suction hopper dredger. Continued re-circulation has proven to maintain low settling rates and to keep yield stresses of re-circulated fluid mud below 50-100 Pa, in combination with densities of 1.15- 1.2 t/m³ enabling...conference paper 2022
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Gebert, J. (author), Huber-Humer, Marion (author), Cabral, Alexandre R. (author)Landfill methane currently represents the largest global source of greenhouse gas emissions from the solid waste sector. Emissions are expected to increase due to increasing waste generation, particularly in countries still landfilling biodegradable wastes. As a complementary measure to gas extraction with subsequent flaring or energy conversion...review 2022
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Meza Ramos, P.N. (author), Lammen, Hans (author), Cruz, Carmen (author), Heimovaara, T.J. (author), Gebert, J. (author)In-situ aeration of landfills accelerates biodegradation of waste organic matter and hence advances waste stabilization. The spatial outreach of aeration greatly affects stabilization efficiency. This study analyzed the spatial variability of gas composition and flow in 230 wells spread over four compartments of a Dutch landfill which is...journal article 2022
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Zander, F. (author), Shakeel, A. (author), Kirichek, Alex (author), Chassagne, C. (author), Gebert, J. (author)Purpose<br/>Sediment organic matter (SOM) influences settling and thus the rheological behavior of suspended particles by enhancing flocculation or reducing surface charges by forming organo-mineral complexes that facilitate particle–particle interactions in consolidating sediments. It was, therefore, assumed that the microbial degradation of...journal article 2022
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Shakeel, A. (author), Zander, F. (author), de Klerk, Jan‑Willem (author), Kirichek, Alex (author), Gebert, J. (author), Chassagne, C. (author)Purpose<br/>The presence of organic matter in cohesive sediment results in the formation of clay-organic flocs, which eventually impart complex rheological behavior including shear-thinning, viscoelasticity, thixotropy and two-step yielding to mud. In this study, the influence of microbial degradation of sediment organic matter on the...journal article 2022
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Zander, F. (author), Groengroeft, A. (author), Eschenbach, A. (author), Heimovaara, T.J. (author), Gebert, J. (author)Anaerobic sediment organic matter decay generates methane, delays sediment consolidation, reduces sediment density, viscosity and shear strength, all impacting the sediment rheological parameters and the navigable depth. This study quantifies the share of anaerobically and aerobically degradable sediment organic matter (SOM) in a depth...journal article 2022
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