This article seeks to provide an outline the scope of professional teaching and learning activities and their connection to civic engagement and the achievement of environmental sustainability at Rhodes University and in Makana Local Municipality. Activities in the context of rainwater water harvesting and sanitation research are used as examples. The improved hydrogen-sulphide test kit was used as the tool for the assessment of microbial water quality between April and July 2016. An approach to the improvement in the design and modelling of the performance of ventillated improved pit latrines under laboratory conditions is also described. All activities described have been taking place in the context of undergraduate and postgraduate student research projects at Rhodes University. They have implications for teaching and learning, civic engagement and environmental sustainability. Teaching and learning of the concepts of sustainability can facilitate the development of the necessary connection between academia and the society at large. This can have a significant positive effect on societal conditions in South Africa. Further endeavours similar those described in this article should be stimulated in South and beyond.

This study describes the results of a series of laboratory experiments on aimed at developing of a protocol for the use of fly ash as a pit additive in the ventilated improved pit latrines (VIPs) in South Africa. Model VIP vaults were prepared in the laboratory and filled with synthetic faecal sludge; and dosed with fly ash in amounts ranging from 5 to 20 % (w/w). The maximum leachable chemical oxygen demand (COD) accounted for 3.2 % of the total organic matter, while the maximum leachable ammonium accounted for 1.4 % of the leachable ammonium present in the synthetic faecal sludge. All phosphate in the synthetic faecal material was leachable. Mixing of the 20 % dose of fly ash into the synthetic faecal sludge resulted a minimum 98.9 % reduction (or about two log units) in the faecal coliform concentration after 28 days of incubation. As a result, addition of fly ash can decrease microbial threats to public and environmental health threats from the VIP faecal wastes, but can cause environmental contamination with phosphate. The fly ash dose and the duration of the faecal sludge treatment require further optimisation. Relationship between the chemical composition of the fly ash used as an additive to stabilise the VIP faecal sludge and the leaching of phosphorus from the sludge will also have to be investigated further.

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