Publication Details

Reference Category Journals
DOI / URL link
Title (Primary) Vertical flow constructed wetlands for decentralized wastewater treatment in Jordan: Optimization of total nitrogen removal
Author Nivala, J.; Abdallat, G.; Aubron, T.; Al-Zreiqat, I.; Abbassi, B.; Wu, G.-M.; van Afferden, M.; Müller, R.A.;
Journal Science of the Total Environment
Year 2019
Department UBZ; DEVELOP;
Volume 671
Language englisch;
POF III (all) T34;
Keywords Arid climate; Domestic wastewater; E. coli; Irrigation; Recirculation; Reuse
Abstract The baseline performance of two full-scale vertical flow (VF) constructed wetlands operating in the arid climate of Jordan is presented in this study, within the context of the Jordanian Standards for reuse of treated wastewater. One system was a recirculating VF wetland, and the other was a single-pass two-stage VF wetland. Operational modifications were made to each treatment system, with the aim of improving Total Nitrogen (TN) removal. For the recirculating VF system, attached-growth media was added to the recirculation tank to provide increased surface area for growth of denitrifying bacteria. The modification showed a small but significant improvement in TN removal (8 mg/L less than the baseline phase; p = 0.004). Statistical analysis showed that 30% and 4.5% of the increase in compliance with the TN limits (Class A and Class B/C, respectively) could be attributed to the modification. The two-stage VF wetland was modified with a step-feeding line that introduced carbon-rich raw wastewater to the intermediate pump shaft just upstream of the second-stage filter. The modification also resulted in a small but significant improvement in TN removal (13 mg/L less than the baseline phase; p = 0.005). The increase in compliance with the TN standard due to the modification was estimated at 20% and 22% for Class A and B/C, respectively. The simple operational modifications proved to be effective for improving total nitrogen removal in arid climate VF wetland systems.
ID 21916
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=21916
Nivala, J., Abdallat, G., Aubron, T., Al-Zreiqat, I., Abbassi, B., Wu, G.-M., van Afferden, M., Müller, R.A. (2019):
Vertical flow constructed wetlands for decentralized wastewater treatment in Jordan: Optimization of total nitrogen removal
Sci. Total Environ. 671 , 495 - 504