TY - JOUR
T1 - Effect of effluent recirculation on the performance of a reed bed system treating agricultural wastewater
AU - Sun, Guangzhi
AU - Gray, Kenneth
AU - Biddlestone, Anthony
AU - Allen, SJ
AU - Cooper, DJ
PY - 2003/11/28
Y1 - 2003/11/28
N2 - Effluent recirculation was investigated in a vertical flow reed bed system treating an agricultural wastewater. A comparison was made for the efficacy of this system before and after recirculation was adopted. Recirculation considerably improved the removal of BOD5, COD, suspended solids (SS) and NH4-N. The most significant improvement was made for NH4-N, and nitrification of NH4-N into NO2-N and NO3-N only took place when recirculation was employed. The removal Of PO4-P, however, was only slightly improved by recirculation. Generally, the removal rate of NH4-N increased proportionally with its loading onto the system. With recirculation the pH value of the wastewater gradually decreased as a result of alkalinity being consumed during the nitrification process, whereas without recirculation the pH remained virtually unchanged. When recirculation was employed, the ambient temperature did not have a significant influence on the removal of BOD5 but appeared to affect NH4-N removal. (C) 2003 Elsevier Science Ltd. All rights reserved.
AB - Effluent recirculation was investigated in a vertical flow reed bed system treating an agricultural wastewater. A comparison was made for the efficacy of this system before and after recirculation was adopted. Recirculation considerably improved the removal of BOD5, COD, suspended solids (SS) and NH4-N. The most significant improvement was made for NH4-N, and nitrification of NH4-N into NO2-N and NO3-N only took place when recirculation was employed. The removal Of PO4-P, however, was only slightly improved by recirculation. Generally, the removal rate of NH4-N increased proportionally with its loading onto the system. With recirculation the pH value of the wastewater gradually decreased as a result of alkalinity being consumed during the nitrification process, whereas without recirculation the pH remained virtually unchanged. When recirculation was employed, the ambient temperature did not have a significant influence on the removal of BOD5 but appeared to affect NH4-N removal. (C) 2003 Elsevier Science Ltd. All rights reserved.
UR - http://www.scopus.com/inward/record.url?scp=0344584905&partnerID=8YFLogxK
U2 - 10.1016/S0032-9592(03)00075-X
DO - 10.1016/S0032-9592(03)00075-X
M3 - Article
VL - 39
SP - 351
EP - 357
JO - Process Biochemistry
JF - Process Biochemistry
IS - 3
ER -