Nitrate Removal of Riparian Buffers Established Through the NC Conservation Reserve Enhancement Program

2006 ◽  
Author(s):  
Dale Hyatt ◽  
Michael Burchell II ◽  
Garry Grabow ◽  
Dan Line ◽  
Robert Evans ◽  
...  
Keyword(s):  
Nitrate Removal ◽  
Riparian Buffers ◽  
Conservation Reserve Enhancement Program

DETERMINING THE EFFECTIVE WIDTH OF RIPARIAN BUFFERS IN KOREAN WATERSHEDS USING THE SWAT MODEL

2013 ◽  
Vol 12 (11) ◽  
pp. 2249-2260 ◽  
Author(s):  
Kyoung Jae Lim ◽  
Jongpil Moon ◽  
Younghun Jung ◽  
Taesoo Lee ◽  
Tai-Cheol Kim ◽  
...  
Keyword(s):  
Swat Model ◽  
Riparian Buffers ◽  
Effective Width

EQUILIBRIUM AND KINETICS STUDY OF NITRATE REMOVAL FROM WATER BY PUROLITE A520-E RESIN

2012 ◽  
Vol 11 (1) ◽  
pp. 37-45 ◽  
Author(s):  
Liliana Lazar ◽  
Laura Bulgariu ◽  
Anca Ceica ◽  
Igor Cretescu ◽  
Ion Balasanian
Keyword(s):  
Nitrate Removal ◽  
Kinetics Study ◽  
Equilibrium And Kinetics

Optimal operations for groundwater denitrification of drinking water using heterotrophic biological denitrification process

2006 ◽  
Vol 6 (2) ◽  
pp. 125-130
Author(s):  
C.-H. Hung ◽  
K.-H. Tsai ◽  
Y.-K. Su ◽  
C.-M. Liang ◽  
M.-H. Su ◽  
...  
Keyword(s):  
Drinking Water ◽  
Removal Efficiency ◽  
Nitrate Removal ◽  
Drinking Water Treatment ◽  
Nitrate Content ◽  
Source Water ◽  
Nitrogen Gas ◽  
Negative Effect ◽  
Denitrification Process ◽  
Heterotrophic Denitrification

Due to the extensive application of artificial nitrogen-based fertilizers on land, groundwater from the central part of Taiwan faces problems of increasing concentrations of nitrate, which were measured to be well above 30 mg/L all year round. For meeting the 10 mg/L nitrate standard, optimal operations for a heterotrophic denitrification pilot plant designed for drinking water treatment was investigated. Ethanol and phosphate were added for bacteria growing on anthracite to convert nitrate to nitrogen gas. Results showed that presence of high dissolved oxygen (around 4 mg/L) in the source water did not have a significantly negative effect on nitrogen removal. When operated under a C/N ratio of 1.88, which was recommended in the literature, nitrate removal efficiency was measured to be around 70%, sometimes up to 90%. However, the reactor often underwent severe clogging problems. When operated under C/N ratio of 1.0, denitrification efficiency decreased significantly to 30%. Finally, when operated under C/N ratio of 1.5, the nitrate content of the influent was almost completely reduced at the first one-third part of the bioreactor with an overall removal efficiency of 89–91%. Another advantage for operating with a C/N ratio of 1.5 is that only one-third of the biosolids was produced compared to a C/N value of 1.88.

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