ITEM VIEW

An assessment of winery wastewater diluted for irrigation of grapevines in the Breede River Valley with respect to water quality and nutrient load

dc.contributor.authorHowell, C. L.en_ZA
dc.contributor.authorMyburgh, P. A.en_ZA
dc.contributor.authorLategan, E. L.en_ZA
dc.contributor.authorHoffman, J. E.en_ZA
dc.date.accessioned2017-03-28T11:17:46Z
dc.date.available2017-03-28T11:17:46Z
dc.date.issued2015
dc.identifier.citationHowell, C. L., Myburgh, P. A., Lategan, E. L. & Hoffman, J. E. 2015. An assessment of winery wastewater diluted for irrigation of grapevines in the Breede River Valley with respect to water quality and nutrient load. South African Journal of Enology & Viticulture, 36(3):413-425, doi:10.21548/36-3-974.en_ZA
dc.identifier.issn2224-7904 (online)
dc.identifier.issn0253-939X (print)
dc.identifier.otherdoi:10.21548/36-3-974
dc.identifier.urihttp://hdl.handle.net/10019.1/100772
dc.descriptionCITATION: Howell, C. L., Myburgh, P. A., Lategan, E. L. & Hoffman, J. E. 2015. An assessment of winery wastewater diluted for irrigation of grapevines in the Breede River Valley with respect to water quality and nutrient load. South African Journal of Enology & Viticulture, 36(3):413-425, doi:10.21548/36-3-974.en_ZA
dc.descriptionThe original publication is available at http://www.journals.ac.za/index.php/sajeven_ZA
dc.description.abstractPossible re-use of winery wastewater for irrigation was investigated in a field trial with micro-sprinklerirrigated Cabernet Sauvignon/99 Richter in the Breede River Valley region of South Africa. Irrigation with winery wastewater diluted to 100, 250, 500, 1 000, 1 500, 2 000, 2 500 and 3 000 mg/L chemical oxygen demand (COD), respectively, was compared to irrigation with raw river water. Since the pH was lower than 6, the diluted wastewater could cause nutrient toxicity. The diluted winery wastewater did not pose any salinity hazard, as the electrical conductivity was well below 2 dS/m. For the given range of dilutions, the sodium adsorption ratio never exceeded 10, which indicates that the water posed no sodicity hazard. Sodium and Cl- never exceeded 115 and 150 mg/L, the respective upper thresholds for grapevines. With the exception of N, levels of H2 PO4 - , K+ , Na+ , Ca2+, Mg2+, HCO3 - , SO4 2- and B3+ in the diluted wastewater increased with a decrease in dilution level. The N load in diluted winery wastewater appeared to be completely inadequate to supply the grapevine’s requirements. In contrast, the P load in the winery wastewater diluted to 2 500 mg/L COD and higher would supply more than adequate P if the grape yield amounts to 10 t/ha. Likewise, the dilution of winery wastewater to 250 mg/L COD and higher would supply more than adequate K+ if the grape yield amounts to 10 t/ha. However, K+ applied via the wastewater will only be beneficial if it is not leached from the root zone during winter.en_ZA
dc.description.urihttp://www.journals.ac.za/index.php/sajev/article/view/974
dc.format.extent13 pagesen_ZA
dc.language.isoen_ZAen_ZA
dc.publisherSouth African Society for Enology and Viticultureen_ZA
dc.subjectWinery wastewater -- Re-useen_ZA
dc.subjectGrapevines -- Breede River Valleyen_ZA
dc.subjectIrrigation water -- Qualityen_ZA
dc.titleAn assessment of winery wastewater diluted for irrigation of grapevines in the Breede River Valley with respect to water quality and nutrient loaden_ZA
dc.typeArticleen_ZA
dc.description.versionPublisher's versionen_ZA
dc.rights.holderSouth African Society for Enology and Viticultureen_ZA


Files in this item

Thumbnail
Thumbnail

This item appears in the following Collection(s)

ITEM VIEW