Characterization of Untreated Wastewater

Dyes and fillers can lead to discoloration and/or turbidity of effluents. Effluents from paper mills have a low content of nitrogen and phosphorus compounds. For this reason, these elements must be added as nutrient salts (e. g. urea and phosphoric acid) to feed micro-organisms during treatment in biological purification plants. The closure of the water circuit within the miU results in an increase in the concentration of the effluent components. On the other hand, the inorganic and 

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