In this paper a survey of literature dealing with emissions of heavy metals and polyaromatic hydrocarbons during coal combustion is given. The paper is focused not only at big industrial furnaces, but also at problems of small scale furnaces. There is a lot of studies dealing with industrial coal combustion. On the contrary studies dealing with small scale furnaces are substantially less freque...

The study reviews the current sorghum and maize production, processing and utilization in Botswana. Most of the grains produced in Botswana are used for home consumption, while processing of commercial and export commodities are limited both in terms of quantity and extent of processing. The major processing activity by both small scale and large scale firms is grain milling into maize and sorg...

This study investigates the technical and economic feasibility of replacing throttling valves with smale-scale, oil-free turbomachinery in industrial steam networks. is done from perspective turbomachine, which has to be integrated into a new or existing process. The considered machines have power range P=[0.5,…,250 kW] been designed using real data processes. Design guidelines are developed, t...