Component groups of the SAB ultrafiltration, type BeWa
- Infeed using frequency-controlled circulation pump
- Prefiltration with automatically rinsable sand filter
- Flocculation agent metering
- PAH metering
- SAB ultrafiltration as a compact plant with automatic cleaning unit
- Chlorination
- Sludge water treatment with ultrafiltration and
- Reverse osmosis
- Siemens S7 control system with touch panel
- Visualisation
Description of the process
The frequency-controlled circulation pump removes the untreated water from the surge water storage tank. Prior to introduction into the pre-filtering stage, PAH or flocculation agents can be added if required. In the pre-filter, flocculated components, PAH and other coarse impurities are removed. After prefiltration, the water is fed into the ultrafiltration. In the interests of energy-optimised operation, the dead-end method of filtering is used. The permeate is chlorinated before it flows into the pool.
Coefficients for treatment quality:
K = 0.5 for chlorine disinfection
K = 0.6 for ozone/chlorine disinfection
Currently discussed value
K = 1.0 - 1.25 with the use of ultrafiltration corresponds roughly to a halving of the treatment performance
Plant cleaning
The pre-filter is automatically rinsed depending on the differential pressure. The untreated water from the surge water container is used for this. The resulting sludge water goes into a sludge water container for interim storage.
The ultrafiltration system is rinsed in a time-controlled way using permeate. To ensure good hygiene, chlorine is added during membrane rinsing. Optionally, the rinsing water from the ultrafiltration is stored just like the sludge water from the pre-filter and in parallel treated in a sludge water treatment process so that it can be re-introduced into the pool water circuit. The concentrate from the sludge water treatment must be removed. Depending on the applicable rules, it may be necessary to add a corresponding treatment stage downstream to comply with the threshold values of Appendix 31.
According to the SAB standard for sludge water treatment, the pool water treatment plants are also equipped for automatic chemical plant cleaning.
Water from the surge water containers with added special membrane cleaners is used for this cleaning and fed into the ultrafiltration from the untreated water side.
The waste water from chemical plant cleaning must also be directed into the sewerage system. Depending on requirements, neutralisation may be
necessary before the waste water is
released.
Visualisation
The operating data is displayed both on the control cabinet touch panel and on the PC in the control station. The various component groups are shown on overview images which also show the current control figures and measured values. Filling levels, quality parameters and throughflows are evaluated, displayed, recorded and graphically represented as progress lines.
The measured data is automatically archived. All the parameters can be viewed and altered in the visualisation feature. The controls can be manually adjusted from all the operating desks as well as via teleservice. Various password levels protect the system from unauthorised access.
electro-dialysis
membrane filtration
membrane plants
pool water treatment 1
pool water treatment 2
pool water treatment 3
reverse osmosis
contact
SCHÜNEMANN Anlagen
sludge disposal
sludge water
sludge water treatment
ultrafiltration
UV-radiation
waste water treatment
water treatment plants