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Subsequent application for the German-Russian-BMBF-Cooperation-Project 'Development of a new anaerobic-aerobic-process for highly concentrated industrial wastewater on the basis of the Russian system BIOSORBER' Final report / Anschlussantrag zum Deutsch-Russischen-BMBF-Kooperationsvorhaben 'Entwicklung eines Anaerobverfahrens zuf Basis des russischen Biosorbers' Abschlussbericht

Authors
  • Wendler, D.
  • Rosenwinkel, K.H.
  • univ., hannover
Publication Date
Jan 01, 2004
Source
OpenGrey Repository
Keywords
Language
German
License
Unknown

Abstract

The project is a sequel of the project with the reference number 02-WA9738/7. Key aspects of the project were (a) development and examination of measures for the improvement of biomass-retention-systems of high-performance anaerobic systems (b) the improvement of early detection for overloading of anaerobic reactors. The lab-scale plant of the preliminary research project was taken for the implementation of the lab-scale trials. In Russia, the operation of the full-scale BIOSORBER-plant was continued and its suitability was confirmed again. Mutual cooperation visits (exchange of project status, teaching of Russian personnel with regard to industrial waste water treatment and appropriate chemical analysis) completed the project. Furthermore, another application was prepared by the two project directors. The research concerning the retention of biomass by filtration was performed with the aid of three lab-scale reactors, one equipped with a downstream filter, one with additional equipment of activated carbon and a third as a reference reactor. Regarding the particulate COD the plant with the filtration provided the lowest effluent concentrations, however COD-peaks where measured under back-flushing. Concerning the diluted COD the plant with activated carbon achieved the best results whereas an occupation of the activated carbon could be observed with increasing trial duration. Due to the positive results of the lab-scale trials and the poor sedimentation characteristics of the pumice stone used in the full-scale plant, the alternative application of filter sand ought to be taken into consideration. Regarding the examinations of the biomass-retention by means of a sieve the best results where obtained for a biomass-proportion of 33% (referring to the reaction volume; alternative: 55%) a sieve-hole-diameter of 1 mm and an upstream velocity of 5 m/h. The sludge loading rate was kept constant at 0,5 g COD/(gVSS x d) in all trials. The overloading trials were performed using plant 1 (1 mm sieve) and plant 2 (3 mm sieve) whereas the upstream velocity was kept constant at 5 m/h. On the one hand the granular sludge proportion (33% or 55%) and on the other hand the intensity of the organic impact load (1,0 and 1,5 g COD/(gVSS x d)) was varied. In all runs plant 2 performed better than plant 1. Concerning the detection of states of overloading the pH-value, biogas production and the methane content were found to serve as a reliable indicator-parameter. Future research activities should focus on and push forward the online-acquisition of data for indicator-parameters. (orig.) / Available from TIB Hannover: F04B1181 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische Informationsbibliothek / SIGLE / Bundesministerium fuer Bildung und Forschung (BMBF), Bonn (Germany) / DE / Germany

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