Suchergebnisse

Part 1: Process fundamentals -- Chapter 1: Fundamentals of biofuel production from anaerobic digestion: Metabolic pathways and interferences -- Chapter 2: Direct interspecies electron transfer for intensification of biogas production -- Part 2: Pretreatment -- Chapter 3: Adsorbents for the detoxification of lignocellulosic wastes hydrolysates to improve fermentative processes to bioenergy production -- Chapter 4: Pretreatment of lignocellulosic materials to enhance biogas production through anaerobic digestion -- Chapter 5: Biogas production from dairy cattle residues – definition of the pretreatment approach through a bibliometric analysis of publications and patents -- Part 3: AD of specific waste-streams -- Chapter 6: Anaerobic digestion of dairy industry wastewater -- Chapter 7: Solid state anaerobic digestion of agricultural waste -- Chapter 8: Food waste biorefinery for bioenergy and value-added products -- Part 4: Downstream processing for resource recovery -- Chapter 9: Valorization of anaerobic digestate for production of value added products -- Chapter 10: Biochar produced from organic waste digestate and its potential utilization for soil remediation: An overview -- Part 5: Integration of AD in biorefineries -- Chapter 11: Integration of bioelectrochemical systems with anaerobic digestion -- Chapter 12: Use of biogas for electricity driven appliances -- Chapter 13: Syngas fermentation for bioenergy production: recent advances in bioreactor systems -- Part 6: Life cycle analysis -- Chapter 14: Up and downstream technologies of anaerobic digestion from life cycle assessment perspective -- Chapter 15: Life cycle analysis of anaerobic digestion systems.

chapter 1 General Introduction -- chapter 2 Literature Review -- chapter 3 Radioactivity Concentrations and their Radiological Significance in Sediments of the Tema Harbour (Greater Accra, Ghana) -- chapter 4 Assessment of DDT, HCH and PAH Contamination and Associated Ecotoxicological Risks in Surface Sediments of Coastal Tema Harbour (Ghana) -- chapter 5 Metal Distribution and Fractionation in Surface Sediments of Coastal Tema Harbour (Ghana) and its Ecological Implications -- chapter 6 Integrated Hazard, Risk and Impact Assessment of Tropical Marine Sediments from Tema Harbour (Ghana) -- chapter 7 Settling Fluxes and Sediment Accumulation Rates by the Combined Use of Sediment Traps and Sediment Cores in Tema Harbour (Ghana) -- chapter 8 Settling Fluxes and Ecotoxicological Risk Assessment of Fine Sedimentary Metals in Tema Harbour (Ghana) -- chapter 9 General discussion and conclusions.

In this study, a mathematical biofilm reactor model based on the structure of the Constructed Wetland Model No.1 (CWM1) coupled to AQUASIM's biofilm reactor compartment has been used to reproduce the sequence of transformation and degradation of organic matter, nitrogen and sulphur observed in a set of constructed wetland mesocosms and to elucidate the development over time of microbial species as well as the biofilm thickness of a multispecies bacterial biofilm in a subsurface constructed wetland. Experimental data from 16 wetland mesocosms operated under greenhouse conditions, planted with three different plant species (Typha latifolia, Carex rostrata, Schoenoplectus acutus) and an unplanted control were used in the calibration of this mechanistic model. Within the mesocosms, a thin (predominantly anaerobic) biofilm was simulated with an initial thickness of 49 mm (average) and in which no concentration gradients developed. The biofilm density and area, and the distribution of the microbial species within the biofilm were evaluated to be the most sensitive biofilm properties; while the substrate diffusion limitations were not significantly sensitive to influence the bulk volume concentrations. The simulated biofilm density ranging between 105,000 and 153,000 gCOD/m3 in the mesocosms was observed to vary with temperature, the presence as well as the species of macrophyte. The biofilm modeling was found to be a better tool than the suspended bacterial modeling approach to show the influence of the rhizosphere configuration on the performance of the constructed wetlands. ; Dutch Government for the financial support provided to undertake this research through the NUFFIC-NFP fellowship No. 320.24424 (2008e2012)