Abstract
Sludge results from the waste water treatments. It can be used as agriculture fertilizing, after the metanic fermentation and draying process. In the present paper the chemical composition of the sludge resulted in Cluj-Napoca waste water treatment plant in March, April and June 2010 is analyzed. Using the conclusion of the study we recommended the controlled use of the sludge as agriculture fertilizer.
Keywords: Waste Water, Waste Water Treatment, Sludge, Agriculture Fertilizer, Environmental Protection