Research on the effectiveness of organic matter treatment of aerobic granular sludge On input wastewarter At urban wastewarter treatment plant

Abstract

Urban wastewater in Vietnam is currently not collected and treated effectively. According to the latest report of the Ministry of Construction (2020), currently only 10 ÷ 15% of urban wastewater flow in Vietnam is collected and treated to meet discharge standards.

Popular wastewater treatment technologies in Vietnam include: activated sludge technology (CAS), sequencing batch reactor technology (SBR), Trickling Filter technology (TF), and oxidation ditch technology (OD), Moving bed bioreactor technology (MBBR), membrane bioreactor technology (MBR),... Application of aerobic granular sludge for urban wastewater treatment in Vietnam is at the laboratory research stage and has achieved results. The initial results were very good under the conditions in Vietnam. In this paper, present the results of research on organic matter
treatment (COD and NH4+ - N) using aerobic granular sludge for wastewater at Truc Bach treatment of Hanoi in a laboratory scale. The research was conducted on sequencing batch reactor (SBR) model with dimensions: tank diameter is 0.110 (m), height is 1 (m), working volume is 4 (liters). One working cycle is 3 hours, in a cycle consisting of 4 phases: water supply phase has 2  (minutes), aeration phase 130 (minutes), rest phase 30 (minutes), discharge phase 15 (minutes). Results: COD removal efficiency is always greater than 90%; NH4+ - N removal efficiency is always greater than 75%.

Key word: Aerobic granular sludge; effective organic matter treatment; wastewater treatment.