Wp 3 – Aeration and membrane operation
Yüklə 55,08 Kb.
|
- Bu səhifədəki naviqasiya:
- Workpackage objectives and starting point of work at beginning of reporting period
- Progress towards objectives
- Experimental setup and results
- Schedule for future activities
- Research objectives “brief overview of objective for each partner” Experimental setup and results
- Deviations from project work plan
WP 3 – Aeration and membrane operationSection 2 – Workpackage progress of the period Provide an overview of the actions carried out in the reporting period, based on the workpackages1 which were active or planned to be active during the period. For each workpackage, present information under the following headings:
Workpackage objectives and starting point of work at beginning of reporting period…1 page.. Short introduction:
Table 3.1: Deliverables List – WP 3 List all deliverables, giving date of submission and any proposed revision to plans.
*) if available Table 3.2: Milestones List – WP 3 List all milestones, giving date of achievement and any proposed revision to plans.
Progress towards objectivesPartner: NTNU Research objectivesThe activities by NTNU are related to sub-tasks 3.1 Common methodologies, 7.2 Lab-scale studies, and 7.3 Definition of optimal parameters. The objective of the activity is to analyze and determine the influence of operating modes (aeration in particular) and membrane reactor configurations on the overall performance of a biofilm-MBR concept. Experimental setup and resultsA pilot plant has been built and is operation. A schematic of the pilot plant is shown in the figure below. In the biofilm-MBR concept the membrane reactor is specifically designed for enhanced particle separation with no recirculation back to the biological reactor. Due to the enhanced particle removal the membrane module has lower SS concentrations compared to AS-MBR process which ultimately will affect aeration demands. Studies have been initiated with the pilot plant to investigate the effect of varying aeration rates and modes on the overall performance of the membrane reactor (i.e. fouling rates).
The effect of aeration on the membrane performance was tested by implementing various aeration modes (i.e. continuous aeration, intermittent aeration, and periodic aeration) with varying degrees of aeration rates. Some of the results found and typical trends are illustrated in figures 1-3.
The results presented in Figure 1 illustrate the effect and efficiency of aeration to remove deposits (cake formation) on the membrane surface and to prevent fouling during filtration. Although it is well known that aeration is an important operating parameter for sustainable operation of MBR systems, all aspects of aeration are not fully understood. One of the aims of this study is to investigate the effect of aeration in a BF-MBR and to make an assessment of the most appropriate aeration conditions of the process configuration. Figure 2 illustrates a comparison of applying continuous aeration vs. periodic aeration (only during backwashing). Although the TMP after a cycle backwash appears to be the same for both modes of operation, the overall TMP development within the cycle production is more pronounced for the periodic aeration mode. The instantaneous TMP within these modes exceeds the recommended maximum TMP for the membrane system and thus this ode of operation may not be suitable for a sustainable mode of operation. In Figure 3 the effect of aeration rates on permeability decline is illustrated. Lower aeration rates have an a greater rate of permeability decline, however, by increasing the aeration rate an asymptotic value is apparent at which increases in aeration rate do not have a significant effect on fouling prevention and/or removal. This has implications for operating costs and optimal process design and control. Preliminary results: The initial experiments show that continuous aeration is necessary for sustainable operation of BF-MBR (Figures 1 and 2). Higher fouling rate within one production cycle was observed for the lower aeration rates. Permeability decline within one cycle on average was 116.2 LMH@20oC/bar for 15 L/m2min and 75.0 LMH@20oC/bar for 120 L/m2min, showing that higher aeration rates give less membrane fouling. However, it was observed that aeration rates higher then 60 L/m2min do not show significant reduction of membrane fouling (i.e. permeability decline) (Figure 3). The work is currently on schedule. Input to date: 0.5 man-months. Schedule for future activitiesTasks within the next reporting period will include continuing with lab-scale studies. Analysis will include direct and indirect characterization of aeration modes and rates on suspended solid properties (i.e. particle characteristics, sizes, size distributions etc.), and effect on membrane fouling. Test will be made and compared for three different pilot plants with different membrane types and varying membrane reactor designs/geometries. Partner: CU Research objectives“brief overview of objective for each partner” Experimental setup and results“brief discussion of setup and results for reporting period – including deviations from work plan” Schedule for future activities“define task which are to be undertaken for the next reporting period” Partner: RWTH Research objectives“brief overview of objective for each partner” Experimental setup and results“brief discussion of setup and results for reporting period – including deviations from work plan” Schedule for future activities“define task which are to be undertaken for the next reporting period” Partner: INSA Research objectives“brief overview of objective for each partner” Experimental setup and results“brief discussion of setup and results for reporting period – including deviations from work plan” Schedule for future activities“define task which are to be undertaken for the next reporting period” Partner: UM2 Research objectives“brief overview of objective for each partner” Experimental setup and results“brief discussion of setup and results for reporting period – including deviations from work plan” Schedule for future activities“define task which are to be undertaken for the next reporting period” Partner: DUT Research objectives“brief overview of objective for each partner” Experimental setup and results“brief discussion of setup and results for reporting period – including deviations from work plan” Schedule for future activities“define task which are to be undertaken for the next reporting period” Partner: UNITN Research objectives“brief overview of objective for each partner” Experimental setup and results“brief discussion of setup and results for reporting period – including deviations from work plan” Schedule for future activities“define task which are to be undertaken for the next reporting period” Partner: UTS Research objectives“brief overview of objective for each partner” Experimental setup and results“brief discussion of setup and results for reporting period – including deviations from work plan” Schedule for future activities“define task which are to be undertaken for the next reporting period” Partner: UKZN Research objectives“brief overview of objective for each partner” Experimental setup and results“brief discussion of setup and results for reporting period – including deviations from work plan” Schedule for future activities“define task which are to be undertaken for the next reporting period” Partner: Polymem Research objectives“brief overview of objective for each partner” Experimental setup and results“brief discussion of setup and results for reporting period – including deviations from work plan” Schedule for future activities“define task which are to be undertaken for the next reporting period” Partner: KMS Research objectives“brief overview of objective for each partner” Experimental setup and results“brief discussion of setup and results for reporting period – including deviations from work plan” Schedule for future activities“define task which are to be undertaken for the next reporting period” Partner: MILL Research objectives“brief overview of objective for each partner” Experimental setup and results“brief discussion of setup and results for reporting period – including deviations from work plan” Schedule for future activities“define task which are to be undertaken for the next reporting period” Partner: WHD Research objectives“brief overview of objective for each partner” Experimental setup and results“brief discussion of setup and results for reporting period – including deviations from work plan” Schedule for future activities“define task which are to be undertaken for the next reporting period” Deviations from project work plan0.5 pages….. “Summarize from reported activities – identify possible consequences for project and remediation actions”. Summary
1 The workpackage on Project management should not be reported here but under Section 3 Yüklə 55,08 Kb. Dostları ilə paylaş:
|
