TY - JOUR
T1 - A recirculating vertical flow constructed wetland for the treatment of domestic wastewater
AU - Sklarz, M. Y.
AU - Gross, A.
AU - Yakirevich, A.
AU - Soares, M. I.M.
N1 - Funding Information:
The authors thank Meiyang Zhou and Anya Mamountov for technical assistance. This research was supported under Grant No. C23-13 funded by the U.S.–Israel Cooperative Development Research Program, Bureau for Economic Growth, Agriculture and Trade, US Agency for International Development.
PY - 2009/9/30
Y1 - 2009/9/30
N2 - A recirculating vertical flow constructed wetland (RVFCW) has been developed for the treatment of grey water. The overall aim of this research was to apply the RVFCW, a decentralized, small-scale system, to the treatment of domestic wastewater (DWW), modifying it, where necessary, to produce effluents that conform to Israeli regulations for urban landscape irrigation. Two RVFCWs were operated with and without a soil-plant component and with various recirculation flow rates (RFR) and treatment times. Without plants, at a RFR of 4.5 m3 h-1 and 12 h treatment time, the average biological oxygen demand (BOD5) and total suspended solids concentrations of the treated effluent were 5 and 10 mg l-1, respectively. A kinetic analysis showed that even 6 h were sufficient to achieve the required effluent quality. Addition of the soil-plant component, which necessitated a reduction in the RFR, caused no changes in effluent quality, and its role in the treatment remained undetermined. In all operational modes, counts of E. coli were reduced from the order of 106 to 103 CFU 100 ml-1, and further reduction to less than 10 CFU 100 ml-1 was attained with a UV irradiation unit. In conclusion, the RVFCW produces high quality effluents, and can treat DWW at a potential organic load of over 120 g BOD5 m-2 d-1.
AB - A recirculating vertical flow constructed wetland (RVFCW) has been developed for the treatment of grey water. The overall aim of this research was to apply the RVFCW, a decentralized, small-scale system, to the treatment of domestic wastewater (DWW), modifying it, where necessary, to produce effluents that conform to Israeli regulations for urban landscape irrigation. Two RVFCWs were operated with and without a soil-plant component and with various recirculation flow rates (RFR) and treatment times. Without plants, at a RFR of 4.5 m3 h-1 and 12 h treatment time, the average biological oxygen demand (BOD5) and total suspended solids concentrations of the treated effluent were 5 and 10 mg l-1, respectively. A kinetic analysis showed that even 6 h were sufficient to achieve the required effluent quality. Addition of the soil-plant component, which necessitated a reduction in the RFR, caused no changes in effluent quality, and its role in the treatment remained undetermined. In all operational modes, counts of E. coli were reduced from the order of 106 to 103 CFU 100 ml-1, and further reduction to less than 10 CFU 100 ml-1 was attained with a UV irradiation unit. In conclusion, the RVFCW produces high quality effluents, and can treat DWW at a potential organic load of over 120 g BOD5 m-2 d-1.
KW - Domestic wastewater
KW - Vertical flow constructed wetland
KW - Wastewater treatment
KW - Water reuse
UR - http://www.scopus.com/inward/record.url?scp=68349158696&partnerID=8YFLogxK
U2 - 10.1016/j.desal.2008.09.002
DO - 10.1016/j.desal.2008.09.002
M3 - Article
AN - SCOPUS:68349158696
SN - 0011-9164
VL - 246
SP - 617
EP - 624
JO - Desalination
JF - Desalination
IS - 1-3
ER -
