engleski

Protecting a Water Course from Gneiss-Quarry Caused Pollution

Very fine gneiss debris released from a wet beneficiation plant of two gneiss quarries Mikleuska enters the stream Kamenjaca at a rate of 70 tons/day, together with 700 m3/day of water. The stream flowers from northern, mostly forest covered, catchment area of approximately 15 km2 and passes between the two quarries. The Croatian regulation prescribe the classification of waters into five groups according to their quality. Water in this permanent stream was categorized in the State registry of waters as a first-class water. Water quality variables used in the classification includes pH value, oxygen, nitrogen, phosphorus, hygienic indicator bacteria, radioactivity and toxic substance, bat without the water colour, and turbidity. Criteria generated were based on the needs set by relevant kinds of water used and its general environmental condition. In this paper exploration of possibilities for technically, environmentally and economically sustainable exploitation of quarries that would ensure protection of water quality in the stream Kamenjaca is described.

gneiss; quarry; suspended solids; sedimentation sump; beneficiation plant

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