Prelimibary Studies with Laboratory Scale Tests

Advanced Treatment of Brewery Effuluent with Floccculation-Sedimentation System (Part 1)

Abstract

Preliminary studies using laboratory scale tests were conducted to evaluate an advanced wastewater treatment using a flocculation-sedimentation system for brewing effuluent which was discharged from actual activated sludge treatment facilities. By flocculation with inorganic flocculants, phosphates, turbidity and colour were almost completely removed. Chemical Oxygen Demand (COD) was reduced by about 50 percent, however there was no effect on nitrogen removal. Among the tested inorganic flocculants, aluminum compounds, especially Poly Aluminum Chloride (PAC) was the most effective. Although organic flocculants quickened the sedimentation of the flocs, they showed no effect on improving environmental pollutant removal when they were used in combination with inorganic flocculants. When aluminum flocculants were added in the range from 0.3 mM to 0.5 mM to a liter of effuluent, almost all phosphate was removed and the ratio between aluminum added and phosphate removed was in the range from 2.5 to 4.6.