Membrane sequencing batch reactor for the wastewater treatment aiming the nutrients removal

作者：Belli Tiago Jose^*; Pera do Amaral Pauline Aparecida; Lobo Recio Maria Angeles; de Sousa Vidal Carlos Magno; Lapolli Flavio Rubens

来源：Engenharia Sanitaria e Ambiental, 2013, 17(2): 143-154.

• membrane sequencing batch bioreactor
• nutrients removal
• wastewater treatment

This study evaluated the performance of a membrane bioreactor sequencing batch, in pilot scale, to remove nutrients (nitrogen and phosphorus) from domestic wastewater. The reactor was operated for 241 days with a total cycle time of 4 hours, with 5 minutes for feeding, 55 minutes for the anoxic phase and 180 minutes for the aeration and filtration phases (simultaneously). Throughout the monitoring, two filtration flows were employed: 5.5 and 11.1 (critical flux) L.m(-2).h(-1), which resulted in the volume exchange rates of 5 and 10%, respectively. The removal efficiencies of total Chemical Oxygen Demand, ammonia nitrogen and total nitrogen were achieved by 99, 98 and 96%, respectively. Regarding phosphorus removal, a poor performance was observed in the beginning of the experiment; however, a tendency of improvement in the removal of this nutrient was further verified, reaching an efficiency average of 74% between the operational days 158 and 241. The flux filtration at 5.55 L.m(-2).h(-1) has provided a membrane bioreactor sequencing batch stable operation in relation to transmembrane pressure since it reached the limit value of 0.7 bar only once in 181 operational days, while for 11.1 L.m(-2).h(-1) it was observed 3 times in 55 days.

• 出版日期2013-6