Nitrogen Removal from Anaerobically Pretreated Swine Wastewater in an Intermittent Aeration Process

2005 ◽  
Author(s):  
Melanie A. Head ◽  
Cesar R. Mota ◽  
Jennifer A. Ridenoure ◽  
Francis L. de los Reyes III ◽  
and Jay J. Cheng
Keyword(s):  
Nitrogen Removal ◽  
Swine Wastewater ◽  
Intermittent Aeration ◽  
Aeration Process

Effect of dissolved oxygen conditions on nitrogen removal in continuously fed intermittent-aeration process with two tanks

2002 ◽  
Vol 45 (12) ◽  
pp. 181-188 ◽  
Author(s):  
T. Hidaka ◽  
H. Yamada ◽  
M. Kawamura ◽  
H. Tsuno
Keyword(s):  
Nitrogen Removal ◽  
Rural Areas ◽  
Aerobic Condition ◽  
Small Scale ◽  
Intermittent Aeration ◽  
Solids Retention ◽  
Oxygen Conditions ◽  
Control Set ◽  
Aeration Process ◽  
Biological Nitrogen

In this study, an intermittent aeration type activated sludge process that is fed continuously is evaluated for nitrogen and organic carbon for facilities in rural areas, which are characterized by small scale, low loading rate and automatic operation. Anoxic and aerobic conditions can be regulated alternatively by intermittent aeration for biological nitrogen removal. It is proved that an intermittent aeration cycle of 90 min, with aeration/anoxic mixing periods of 25~30 min/65~60 min in Tank 1, and 30~45 min/60~45 min in Tank 2, and a DO control set at 0.6~1 mg/L during the aeration period are required for satisfactory treatment performance. Under these conditions, a stable effluent water quality with BOD ≤ 5 mg/L, CODMn ≤ 8 mg/L, Nitrogen ≤ 3 mgN/L, SS ≤ 5 mg/L and transparency ≥ 80 cm can be achieved. The solids retention time in aerobic condition was 10~25 d, which is sufficient for nitrification.

OPTIMIZATION OF INTERMITTENT AERATION FOR NITROGEN REMOVAL FROM SWINE WASTEWATER

2004 ◽  
Vol 2004 (10) ◽  
pp. 238-245
Author(s):  
Jennifer A. Ridenoure ◽  
Melanie A. Head ◽  
Cesar R. Mota ◽  
Francis L. de los Reyes ◽  
Jay J. Cheng
Keyword(s):  
Nitrogen Removal ◽  
Swine Wastewater ◽  
Intermittent Aeration
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