Mass transfer phenomena in methanogenic and sulphidogenic aggregates - characterisation and optimisation based on nmr
4РП — Обучение и мобилност на изследователи
- Период
- 1996-01-01 → 1997-12-31
- Финансиране от ЕС
- —
- Участници
- 2
- Схема
- RGI
Линиите свързват координатора с партньорите. За проекти отпреди 2014 г. CORDIS не винаги дава точни координати. Тези точки са на ниво град или държава.
Накратко на български
Преносът на вещества в биореактори за пречистване на отпадни води се анализира чрез NMR-техники, като се тестват методи като промяна на скоростта на потока или свиване и разширяване на гранулите. Това помага за оптимизиране на ефективността при пречистване на води, богати на сулфати.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Цел на проекта
In anaerobic wastewater treatment, Upflow Anaerobic Sludge Blanket (UAS reactors operating under sulphidogenic conditions (COD/SO42- < 1) are an emerging reactor technology for the treatment of sulfate rich wastewater. Unlike methanogenic reactors, few gaseous end products are formed, resulting in inferior mass transfer rates compared to methanogenic UASB reactors. The aim of this research proposal is to study possible improvement of t treatment efficiency of such sulphidogenic bioreactors by improved mass transfer. Three ways to accelerate mass transfer will be studied: (i) upflow velocity in the reactor, (ii) mixing by gas evolution and (iii) the 'breathing' granule principle. The latter consists of alternate compression and expansion of granules. The effect of these operational strategies will be evaluated in laboratory scale reactors using specially developed NMR-techniques, i.e. pulsed gradient spin echo-NMR (PGSE-NMR) imaging, PGSE-NMR spectroscopy and chemical shift imaging. NMR was chosen as this non invasive technique provides information inaccessible compared to ex vivo techniques like microelectrodes or confocal microscopy. However, to assess the accuracy and reproducibility of the developed NMR protocols, the effective diffusion and mass transfer coefficients obtained by NMR will be compared to those obtained by microelectrode measurements. The insight in mass transfer phenomena given by the NMR techniques, in combination with the operation of laboratory scale bioreactors will contribute to the optimisation of the process efficiency of UASB reactors operating under fully sulphidogenic conditions.
Оригинален текст от CORDIS (на английски).
Участници
- Landbouwuniversiteit Wageningen · WageningenКоординаторНидерландия
- Not availableНиво градБелгия
Връзки
Данни: CORDIS, © Европейски съюз