Lime is an important and versatile chemical used in a wide range of
industrial and other applications. The term lime, which strictly refers
to calcium oxide (CaO), is applied to a range of products arising from
the grinding, calcination and hydration of limestone and dolomite. Many
less developed countries do not have adequate lime production and this
leads to problems associated with under-utilisation of lime. In
particular, insufficient application of agricultural lime can lead to
soil acidification, with associated aluminium / manganese toxicity and
poor crop yields.
As part of the UK Government's commitment to provide technical
assistance to developing countries, a project was initiated to help
solve this problem. The BGS/DFID project \"Local development of
affordable lime in Southern Africa\" (R6492) carried out under the DFID
Knowledge and Research (formerly the Technology Development and
Research) programme aimed to encourage the development of low-cost lime
for agriculture and water treatment. As part of the project, carbonate
resources were matched with appropriate lime production technology to
provide a methodology for the establishment of local production units.
The project was undertaken in collaboration with the Zambian Geological
Survey Department (GSD), who carried out field sampling and laboratory
evaluation of carbonates, and Intermediate Technology Zimbabwe (ITZ),
who reviewed existing small-scale lime production practices in Zimbabwe.
The project focused on agricultural lime production in Zambia, following
the recommendations of a recent survey of the lime industry of the
Southern African Development Community (SADC) region (AUSTROPLAN, 1990).
The project was sub-divided into three main activities:
1. Lime evaluation programme;
2. Small-scale lime production research;
Mitchell, C.J.; Inglethorpe, D.J.; Tawodzera, P.; Evans, E.J. Local development of affordable lime in southern Africa: project summary report. (WC/98/021). (1998)
Local development of affordable lime in southern Africa: project summary report. (WC/98/021).