2. Sequencing batch reactors Used to treat Wine cellar effluent Andrew Hulsman (HWT)

3. About 8.5% of Western Cape GDP 709 million litres produced in 2006 2 to 8 litres water per litre wine 100 million litres effluent per day A 20 000 ton cellar discharges the COD equivalent of the daily sewage produced from a town of 24 000 people Wine industry contribution to our economy

4. Wine waste water Beneficial reuse Various treatment methods Wine Cellar Vineyards

5. Various treatment methods Wine waste water Low pH High COD Variable EC Fluctuating flow rate Pips & skins

6. Various treatment methods Beneficial reuse COD < 400 pH neutral

7. Flow formsFine solids removalLime dosingAerated bioreactorReed bedScreeningBeneficial reuse Grape pips and skinsFilter aids, leespH neutralLower cod,nutrientsBuffer, disinfectUnravel, revitalizeCrop irrigation

8. Bioreactor design Sequencing batch reactors Practical Economical Small footprint Automatic operation (PLC)

9. Sequencing batch reactors

10. Bioreactor design Sequencing batch reactors

11. Bioreactor design Sequencing batch reactors FillingAerationSettlingDraining TWL Cycle time LWL

12. Bioreactor design Determined by flow and load 8000 500

13. dO dT OUR = dO/dT (mgO/l/hr) Bioreactor design Determining the oxygen requirement

14. Bioreactor design Differing oxygen demand

15. Bioreactor design Aerobic digestion

16. Bioreactor design Biomass changes through year

17. Maintenance During the pressing the winemakers Make good wine Ignore the wastewater treatment plant

18. Practical Yes, except if not used Economical Yes if < 500 kl/d Small footprint Automatic operation (PLC) yes, except during power failure Work well with Regular maintenance Reed beds Sequencing batch reactors

19. Thank you

20. Wine Cellar Effluent Treatment 1000 Tons

21. Wine Cellar Effluent Treatment