Equação empírica para a determinação do custo total com o manejo do lodo na ETA de Chapecó-SC

Abstract

This paper proposes modeling through empirical equations the relationship between turbidity and total cost involved in the sludge handling, i.e., the sum of the costs of the coagulant to the sludge conditioning polymers, with the energy consumed in dewatering and transportation and final disposal. To establish this empirical equation we used the correlation curves of dosage coagulant versus turbidity and also ST (total solids) versus turbidity, developed for the same station on TCC (course completion paper) the environmental engineering course of UFFS (Universidade Federal South of the frontier) 18 defended in 2014. From these curves was determined an empirical equation correlating turbidity with the cost PAC (Aluminum Polycloret) used in coagulation, an empirical equation correlating turbidity with the cost of polymer used as spin assist an equation correlating turbidity with the cost of electric power consumed during centrifugation and the empirical equation correlating turbidity with the cost of transportation and final disposal of the sludge. After that all these costs are added and obtained empirical equation turbidity correlating to the total cost for a given day. The total cost involved in the treatment of water for the experimental period was R $ 584,898.66, and the spent polymer was 384,311.77, which represents 61% of the total demonstrating that has an ETA to a treatment system sludge cost centrifugation auxiliary polymer is more representative cost.