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

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

Wine waste water Beneficial reuse Various treatment methods Wine Cellar Vineyards

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

Various treatment methods Beneficial reuse COD < 400 pH neutral

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

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

Sequencing batch reactors

Bioreactor design Sequencing batch reactors

Bioreactor design Sequencing batch reactors FillingAerationSettlingDraining TWL Cycle time LWL

Bioreactor design Determined by flow and load

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

Bioreactor design Differing oxygen demand

Bioreactor design Aerobic digestion

Bioreactor design Biomass changes through year

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

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

Thank you

Wine Cellar Effluent Treatment 1000 Tons

Wine Cellar Effluent Treatment