The main aim of purification of the process water and wastewaters is to
decrease the content of toxic substances (especially phenols) in wastewater
discharged into the natural water reservoirs. Besides, as a result of local
treatment, phenols can be obtained a valuable raw material for the synthesis
of many chemical products.
The aim of the present study was also to compare the two oil shale thermal
treatment processes, the Kiviter and the Galoter processes (with solid
heat carrier) from the point of view of amount and treatment scheme of phenolic
effluents as well as of the yield of water-soluble phenols; to compile
the general water flow scheme through the shale oil production in the Kiviter
process up to the biological treatment plant; to compile the balances of water
and pollutants to analyze the efficiency of the biological treatment process
for phenols removal and to search for additional chemical oxidation methods
to improve the biological process efficiency if needed.