TY - JOUR
T1 - Long-term nitrogen behavior under treated wastewater infiltration basins in a soil-aquifer treatment (SAT) system
AU - Mienis, Omer
AU - Arye, Gilboa
N1 - Funding Information:
The partial financial support for this study by the Jacob Blaustein Institutes for Desert Research , Ben-Gurion University of the Negev , Israel and Mekorot Water Co., Israel is gratefully acknowledged.
Funding Information:
The partial financial support for this study by the Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Israel and Mekorot Water Co., Israel is gratefully acknowledged.
Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2018/5/1
Y1 - 2018/5/1
N2 - The long term behavior of total nitrogen and its components was investigated in a soil aquifer treatment system of the Dan Region Reclamation Project (Shafdan), Tel-Aviv, Israel. Use is made of the previous 40 years' secondary data for the main nitrogen components (ammonium, nitrate and organic nitrogen) in recharged effluent and observation wells located inside an infiltration basin. The wells were drilled to 106 and 67 m, both in a similar position within the basin. The transport characteristics of each nitrogen component were evaluated based on chloride travel-time, calculated by a cross-correlation between its concentration in the recharge effluent and the observation wells. Changes in the source of recharge effluent, wastewater treatment technology and recharge regime were found to be the main factors affecting turnover in total nitrogen and its components. During aerobic operation of the infiltration basins, most organic nitrogen and ammonium will be converted to nitrate. Total nitrogen removal in the upper part of the aquifer was found to be 47–63% by denitrification and absorption, and overall removal, including the lower part of the aquifer, was 49–83%. To maintain the aerobic operation of the infiltration fields, the total nitrogen load should remain below 10 mg/L. Above this limit, ammonium and organic nitrogen will be displaced into the aquifer.
AB - The long term behavior of total nitrogen and its components was investigated in a soil aquifer treatment system of the Dan Region Reclamation Project (Shafdan), Tel-Aviv, Israel. Use is made of the previous 40 years' secondary data for the main nitrogen components (ammonium, nitrate and organic nitrogen) in recharged effluent and observation wells located inside an infiltration basin. The wells were drilled to 106 and 67 m, both in a similar position within the basin. The transport characteristics of each nitrogen component were evaluated based on chloride travel-time, calculated by a cross-correlation between its concentration in the recharge effluent and the observation wells. Changes in the source of recharge effluent, wastewater treatment technology and recharge regime were found to be the main factors affecting turnover in total nitrogen and its components. During aerobic operation of the infiltration basins, most organic nitrogen and ammonium will be converted to nitrate. Total nitrogen removal in the upper part of the aquifer was found to be 47–63% by denitrification and absorption, and overall removal, including the lower part of the aquifer, was 49–83%. To maintain the aerobic operation of the infiltration fields, the total nitrogen load should remain below 10 mg/L. Above this limit, ammonium and organic nitrogen will be displaced into the aquifer.
KW - Infiltration basin
KW - Nitrogen
KW - Soil aquifer treatment
KW - Treated wastewater
UR - http://www.scopus.com/inward/record.url?scp=85041417981&partnerID=8YFLogxK
U2 - 10.1016/j.watres.2018.01.069
DO - 10.1016/j.watres.2018.01.069
M3 - Article
C2 - 29427961
AN - SCOPUS:85041417981
SN - 0043-1354
VL - 134
SP - 192
EP - 199
JO - Water Research
JF - Water Research
ER -