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Item type:Publication, Access status: with files , Bioressourceninventur – Analyse von Stoffströmen zur Bestimmung urbaner Biomassepotenziale in einem Geoinformationssystem (GIS)For the efficient energetic and material utilisation of bioresources from urban areas the knowledge of their amounts, origin and composition is very important. In this work the specific spatial dependencies between geographic data and the characteristics of the bioresources are investigated. Influencing factors and parameters for their determination for a bioresources inventory based on geographical data in a GIS are developed.Publicationtype: Doctoral Thesis772 1345 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Pilotstudie zur Anwendbarkeit eines integrierten Konzeptes zur dezentralen Behandlung von Abwasser und AbfallThe INKONDA method examined in this thesis is combining membrane and biogas technologies and further implements these as part of an overall concept for decentralized applications. Within pilot-scale a fully automated system operation was investigated in which the process-steps membrane filtration, anaerobic digestion and dewatering of solid residues were operated in full compliance. Investigations of the quality properties of on-site products included vegetation tests, analysis of hygiene parameters together with endocrine substances, odour tests, nutrient analysis, heating value and further investigations considering pelletising and conditioning.Publicationtype: Doctoral Thesis869 1545 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Fermentative Erzeugung von Biowasserstoff aus biogenen Roh- und ReststoffenThis dissertation investigates the fermentative production of biohydrogen and biomethane. The highest H2-production values up to 280 NL H2/kg VSS were achieved using the substrates fodder-, sugar beet, maize and potato. Compared to conventional biogas plants, the estimated energy recovery of the combinated H2- and CH4-production is approx. 25 % higher so that the process is a promising method of environmentally friendly and sustainable energy production from biomass or biowaste. Further advantages are the efficient, low-emission and manifold utilisation options of hydrogen in fuel cells.Publicationtype: Doctoral Thesis1356 2914 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , GERUCHSMANAGEMENT - Methoden zur Bewertung und Verminderung von Geruchsemissionen(2009); Within this thesis an odour management strategy has been invented, aiming at effective and reliable solutions for specific odour emissions problems with minimum expenses. The concept covers the whole scenario from the odour assessment including a thorough characterization of all emissions source to the technical reduction of odorous emissions. For the characterization of odour emissions a new odour-index method has been developed and applied to various sources. The development and optimization of mobile test systems allow a first evaluation of potentially suitable odour treatment methods for a specific odour emission problem with quite handy equipment. Taking an oil and fat refinery as an example, the odour management strategy has successfully been applied. For the main emissions source, which resulted from the deacidification process, the odorous key substances have been identified, and a suitable treatment system has been designed. Finally, all findings resulting from this work have been fed into a self-designed odour specific data base.Publicationtype: Doctoral Thesis1363 1976 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Stickstoffhaushalt bei der Kompostierung : Bilanzen, Gehalte, Umsetzungs- und AustragsprozesseNitrogen household during composting – balances, contents, turnover-, and release processes Some N-compounds have a huge resource potential especially if used in agri- and horticulture culture for fertilization. On the other, N-compounds may also lead to strong negative environmental impacts. In the present book, the N-compounds as well as their behavior and changes during composting are described. On the basis of technical scale investigations N-turn-overs and -releases were determined and N-balances generated. Based on this, universally valid principles and models were formulated considering the depend-ency on influencing factors such as substrate composition, degradation stage, water content, pH-value, tem-perature, and gas composition. The occurring processes - ammonification, nitrification, denitrification, immobilisation - are described and discussed. The results allow the evaluation of composting in the context of the global N-household. They also can be used for the development of innovative processes, e.g. for fertilizer production from biowaste and for N-emissions minimisation strategies.Publicationtype: Doctoral Thesis1477 5962