A conceptual basis for microbial selection in biological wastewater treatment von Pretorius, W.A.

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Batch and automated SVI measurements based on short-term temperature variations von Pretorius, W.A., Rossle, W.H.

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Production of valuable products from organic waste streams von van der Westhuizen, T.H., Pretorius, W.A.

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Spectrophotometric determination of pKa values for fluorescein using activity coefficient corrections von Pretorius, W.A., Smith, S.A.

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Kinetics of hydrogen assimilation in the methane fermentation von Shea, Timothy G., Pretorius, W.A., Cole, R.D., Pearson, E.A.

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Applications of new concepts of physical—Chemical wastewater treatment von Pretorius, W.A.

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The conservative behaviour of fluorescein von Pretorius, W.A., Smith, S.A.

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A review of characterisation requirements for in-line prefermenters : Paper 1 : Wastewater characterisation von Rossle, W.H., Pretorius, W.A.

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Application of an adapted evaluation process using numerical & qualitative weighted sum techniques von Pretorius, W.A., Helberg, A.S.

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Applications of new concepts of physical—Chemical wastewater treatment: Eckenfedler, W.W. and L.K. Cecil, eds. (1972): Progress in water technology Vol. 1. 392 pp., 127 figs., 100... von Pretorius, W.A.

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A review of characterisation requirements for in-line prefermenters : Paper 2 : Process characterisation von Rossle, W.H., Pretorius, W.A.

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Use of the crossflow-microscreen technique for SCP production from dilute substrates von KÜHN, A. L, PRETORIUS, W. A

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Fungal-purification of an industrial effluent containing volatile fatty acids by means of a crossflow-microscreen technique von Kuhn, A.L, Pretorius, W.A

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The effect of formate on the growth of acetate utilizing methanogenic bacteria von Pretorius, W.A.

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selective cultivation of easily harvestable algae using crossflow-microscreening von Pretorius, W.A, Hensman, L.C

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Anaerobic digestion of raw sewage von Pretorius, W.A.

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Some operational characteristics of a bacterial disc unit von Pretorius, W.A.

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Biomass production of Aspergillus fumigatus on spent sulphite liquor under non-aseptic conditions von Pretorius, W.A. & Lemoert, G.C.

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The selective cultivation of the thermotolerant Aspergillus sp. on spent sulphite liquor von Pretorius, W.A. & Lemoert, G.C.

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Growth characteristics of Aspergillus sp. grown on spent sulphite liquor von Pretorius, W.A. & Lemoert, G.C.

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