The Effect of Various Dosages of Coagulants to Reduction of Pollutants from Sulfite Pulping Plant Effluent

In this research, reduction of color, turbidity and COD in sulfite pulp mill effluent due to using various dosages of coagulants (alum, ferric chloride and poly aluminum chloride) as single and dual have been investigated. Results of investigation illustrate that combination of above mentioned coagulants sometimes improve the coagulation and flocculation operation in wastewater treatment plant. But respect to cost of coagulants and chemical treatment system in similar conditions, using combined coagulants for taking equal results often increases the costs and complexity of chemical effluent treatment.