Description: Das Projekt "Biogas production by treating sludge of a waste water treatment plant" wird vom Umweltbundesamt gefördert und von Schwarting-Uhde GmbH Umwelt- und Bioverfahrenstechnik durchgeführt. Objective: The subdivized project is concerned with the establishement and demonstration operation of a plant for gaining biogas from the sludge of a communal sewage plant and utilizing it to create electrical and thermal energy. By the process of gaining energy from the biological degradation of the organic substances of the sewage sludge, the corresponding amount of primary energy can be substitutes. At the same time, the quantity of dry matter for disposal is reduced by about 50 per cent. The sludge treated in this way can then be both deposited and used for recultivation. The aim of demonstration operation was to confirm and improve the turnover rates achieved in extensive preliminary investigations for microbial methane production from the sewage sludge of a communal sewage plant. General Information: The demonstration plant was based on the Schwarting/Udhe process. To ensure a high degradation rate even in peak load periods, this process operates in two successive stages. Moreover, it does not use fully mixed fermenters, but narrow standing containers. In these containers, there is a defined slug flow in which the necessary contact between the substrate and the biomass is created by a patented phase mixing system. In the degradation of communal sewage sludge in conventional single-stage plants, only 20-30 per cent of the dry organic matter could be converted to biomass. In extensive preliminary investigations carried out in cooperation with the Fraunhofer Institute for contact surface and bio-process technology, a modified variant of the Schwarting/Udhe process was developed which permits degradation rates of 50-60 per cent of the dry organic matter. Simultaneously, the residences time of 25-30 days in conventional singel-stage fermenters has been reduced considerably. Achievements: The installation for the 2-stage fermentation of sewage sludge, which was to be established in accordance with the project description, was constructed in 1993/94 after planning work in 1992/93, and it was taken into operation by September 1994. Demonstration operation of the plant was carried out from Oct.94 to Dec.95. For external reasons, the installation could only be operated in the difficult partial load area with extraordinary fluctuations in the intake volume and intake concentration during this period. In spite of the sometimes difficult operation under partial load, the plant shows a below average amount of wear. Up to now, only the explicit wearing parts have had to be replaced, and as a rule, even these parts had exceeded the anticipated service life. However, the components used were cheked and optimized in intensive cooperation with the operator with respect to their use; permanent operation under full load is possible without any restrictions. The device planned for holding back biomass in the second fermentation stage, which was implemented for the first time in this project, has shown its functionality. As anticipated, the degree of...
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Hirsch ? Biogas ? Nacktschnecke ? Klärschlammverwertung ? Schlammbehandlung ? Trockensubstanz ? Abfallbehandlung ? Abfallverwertung ? Erdgasförderung ? Kläranlage ? Klärschlamm ? Pflanzensamen ? Mikrobiologie ? Bioverfahrenstechnik ? Dauerbelastung ? Deponie ? Stromerzeugung ? Abfallreduzierung ? Fermentation ? Abwasserbehandlungsanlage ? Alternative Energie ? Methan ? Primärenergie ? Rekultivierung ? Organisches Material ? Transportbehälter ? Wärme ? Wärmeerzeugung ? Trockensubstanzgehalt ? Organische Verbindung ? Organischer Abfall ? Bioreaktor ? Bodendegradation ? Thermisches Verfahren ? Energiespeicher ? Umweltfreundliches Produkt ? Verfahrenstechnik ? Abfallaufkommen ? Nutzungsbeschränkung ? Wirkungsgrad ? Biotransformation ? Instandhaltung ? Biologischer Abbau ? Abwasseranlage ? Anlagenüberwachung ? Biogaserzeugung ? Abbaubarkeit ? Energietransport ? Energieeinsparung ? Gaserzeugung ? Kommunalebene ? Anlagenbetrieb ? Versuchsanlage ? Chemische Reaktion ? Biomasse ? Lebenszyklus ? Trockenverfahren ? Biomasseproduktion ? Schwarting/Uhde-Prozess ? Biochemische Reaktion ? Verweilzeit ? renewable sources of energy ?
Region: Schleswig-Holstein
Bounding boxes: 9.75° .. 9.75° x 54.2° .. 54.2°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1991-01-01 - 1995-03-31
Accessed 1 times.