| Characterisation of winery wastewater from continuous flow settling basins and waste stabilisation ponds over the course of 1 year: Implications for biological wastewater … PJ Welz, G Holtman, R Haldenwang, M le Roes-Hill Water Science and Technology 74 (9), 2036-2050, 2016 | 51 | 2016 |
| Treatment wetlands and phyto-technologies for remediation of winery effluent: Challenges and opportunities AE Mader, GA Holtman, PJ Welz Science of the Total Environment 807, 150544, 2022 | 24 | 2022 |
| Biological sand filter system treating winery effluent for effective reduction in organic load and pH neutralisation GA Holtman, R Haldenwang, PJ Welz Journal of Water Process Engineering 25, 118-127, 2018 | 24 | 2018 |
| The influence of grain physicochemistry and biomass on hydraulic conductivity in sand-filled treatment wetlands PJ Welz, W Mbasha, I Smith, G Holtman, G Terblanche, M Le Roes-Hill, ... Ecological engineering 116, 21-30, 2018 | 13 | 2018 |
| Comparison of continuous and pulse mode of operation of pilot biosand reactors treating winery effluent GA Holtman, R Haldenwang, PJ Welz Ecological Engineering 182, 106706, 2022 | 6 | 2022 |
| Calcite dissolution and bioneutralization of Acidic Wastewater in Biosand reactors GA Holtman, R Haldenwang, PJ Welz Water 14 (21), 3482, 2022 | 3 | 2022 |
| Effect of particle character and calcite dissolution on the hydraulic conductivity and longevity of biosand filters treating winery and other acidic effluents GA Holtman, R Haldenwang, PJ Welz Water 14 (17), 2603, 2022 | 3 | 2022 |
| Anaerobic digestion of primary winery wastewater sludge and evaluation of the character of the digestate as a potential fertilizer WM Kaira, E Kimpiab, AB Mpofu, GA Holtman, A Ranjan, PJ Welz Biomass Conversion and Biorefinery 13 (12), 11245-11257, 2023 | 2 | 2023 |
| Resource recovery from tannery wastewater using an integrated biological system: Towards a circular bioeconomy and net positive tannery operations AB Mpofu, WM Kaira, GA Holtman, OO Oyekola, RP van Hille, PJ Welz Journal of Cleaner Production 387, 135872, 2023 | 2 | 2023 |
| Biosand reactors for remediation of winery effluent in support of a circular economy and the positive effect of sand fractionation on hydraulic and operational performance GA Holtman, R Haldenwang, PJ Welz Journal of Water Process Engineering 53, 103849, 2023 | 1 | 2023 |
| Sand based system for physiochemical and biological treatment of winery wastewater GA Holtman Cape Peninsula University of Technology, 2023 | | 2023 |
| Design, installation, and assessment of a biological winery wastewater treatment system GA Holtman Cape Peninsula University of Technology, 2017 | | 2017 |
