TY - JOUR
T1 - Practice of integrated system of biofilter and constructed wetland in highly polluted surface water treatment
AU - Jing, Zhaoqian
AU - He, Rui
AU - Hu, Yong
AU - Niu, Qigui
AU - Cao, Shiwei
AU - Li, Yu You
N1 - Funding Information:
This research was supported by the Technology Project of China Housing and Urban-Rural Development Ministry, the Project of the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) and China National Undergraduate Innovation Project (201310298031z).
Publisher Copyright:
© 2014 Elsevier B.V.
PY - 2015/2/1
Y1 - 2015/2/1
N2 - To find an appropriate process for highly polluted surface water, an integrated system with a double-layer biofilter and a constructed wetland was developed. In the biofilter packed with carbon-rich ceramic granules, alternation of nitrification and denitrification was realized resulting in prominent TN (total nitrogen) removal. The constructed wetland was designed in subsurface flow mode with 0.15m depth filled with calcium-rich ceramic granules, which improved phosphorus removal greatly. COD (chemical oxygen demand), TN, NH4+-N and TP (total phosphorus) in the final effluent were mostly below 30, 15, 5 and 0.5mg/L, respectively. The overall phosphorus removal rate in the constructed wetland reached 158.9g/m2year, in which granules' interception and plants' uptake respectively contributed 74.7% and 25.3%. After one year's operation, the calcium content on the surface of the granules in the constructed wetland decreased obviously, whereas phosphorus content increased greatly.
AB - To find an appropriate process for highly polluted surface water, an integrated system with a double-layer biofilter and a constructed wetland was developed. In the biofilter packed with carbon-rich ceramic granules, alternation of nitrification and denitrification was realized resulting in prominent TN (total nitrogen) removal. The constructed wetland was designed in subsurface flow mode with 0.15m depth filled with calcium-rich ceramic granules, which improved phosphorus removal greatly. COD (chemical oxygen demand), TN, NH4+-N and TP (total phosphorus) in the final effluent were mostly below 30, 15, 5 and 0.5mg/L, respectively. The overall phosphorus removal rate in the constructed wetland reached 158.9g/m2year, in which granules' interception and plants' uptake respectively contributed 74.7% and 25.3%. After one year's operation, the calcium content on the surface of the granules in the constructed wetland decreased obviously, whereas phosphorus content increased greatly.
KW - Biofilter
KW - Ceramic granule
KW - Constructed wetland
KW - Denitrification
KW - Phosphorus removal
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U2 - 10.1016/j.ecoleng.2014.12.015
DO - 10.1016/j.ecoleng.2014.12.015
M3 - Article
AN - SCOPUS:84920675181
SN - 0925-8574
VL - 75
SP - 462
EP - 469
JO - Ecological Engineering
JF - Ecological Engineering
ER -