Effectiveness of organic removal in the growth of Aerobic granulation

Abstract

Growth and application of aerobic granulation in wastewater treatment has been in recent years in the World. Research on aerobic granules has greatly increased in number and quality. Research on the wastewater treatment efficiency of aerobic granular sludge has developed, especially research on the efficiency of wastewater treatment in the growth of aerobic.

This essay describes the process of effectiveness of COD removal and Nitrification in growth of aerobic granulation with artificial wastewater, acetate is the main component at the laboratory in Viet Nam. The culture sludge is activated sludge taken from the conditioning tank of Yen So treatment. Research is carried out on the reactor SBR technology with 0,11 m in diameter and 1 m in height, working volume of 2,5 lit.

The time of one cycle is 4 hours, each cycle is divided into 4 periods: 1 - 2 min of influent filling, 180 min of aeration, 20 - 30 min of settling and 10 - 15 min of effluent… The input wastewater is wastewater with high strength and has an OLR of 2,7 - 3,0 kg COD/m3.day, the time for research is 120 days. As a result, after 120 days COD removal is more than 90%, NH4+ - N removal is more than 80%.