Technical Yearbook 2024

FIGURE 2. Schematic of zero-waste model for remediation and reuse of winery wastewater and primary winery wastewater sludge.

Zero-waste model Building on the results obtained from this work, a zero waste model for remediation of winery wastewater and PWWS/SWWS is proposed as outlined in the schematic (Figure 2). The intent is to contribute to minimising waste formation and maximising resource recovery in wineries. The model consists of the following elements: • Fractionation of Phillipi sand. • Application of the fraction of sand consisting of larger particles (≥0.425 mm) in BSRs. • Remediation of winery wastewater in BSRs and reuse of the treated effluent for beneficial irrigation. • Application of the smaller sand particles (<0.425 mm) in self-compacting, high-performance concrete mixes.

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Digestion of PWWS via AD.

• Utilisation of biogas from AD to supplement the green energy mix in wineries. • Utilisation of the digestate from AD as an agricultural fertiliser. Funding This work was supported by the Wine Industry Network of Expertise and Technology (Winetech) (CSUR 13091742538) and the Water Research Commission (Project (Project C2020/2021 – 00393). Any opinions, findings and conclusions or recommendations expressed in this material are those of the authors and the funding entities do not accept any liability in this regard. 

References https://www.wineland.co.za/biosand-reactors-and-anaerobic-digestion-a-zero-waste-model-for winery-wastewater-part-2/

For more information, contact Gareth Holtman at gareth@holtman.co.za.

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TECHNICAL YEARBOOK 2024