URBAN WASTEWATER TREATMENT WITH PHOSPHORUS CONTAMINATION BY SOIL FLOODING

Abstract

The objective of this research was to study the effect of phosphorus concentration on urban wastewater treatment. The experimental design of this study was 3x4 Factorial in Completely Randomize Design with 3 replications and there were 2 experimental factors in this research; phosphorus concentration and flooding period. The first factor was phosphorus concentration, there were 4 levels of phosphorus concentration in synthetic wastewater with 200 mg/L glucose; 0, 5 and 10 mg/L, respectively. The second factor was flooding periods, there were 4 levels of flooding period; 0, 1, 3 and 5 days, respectively. The soil sample for this experiment was collected from Bang-Khonthi district, Samut-Songkhram province.

The result shown as, the chemical oxygen demand was quite decreased depended on flooding periods with highly significant (P<0.01). There had not found the interaction between phosphorus concentration and decreasing of the chemical oxygen demand in synthetic wastewater (P<0.05). Besides that, this experiment could reduce phosphorus concentration in synthetic urban wastewater, were not over 2 mg/l since the 1^st flooding day.