Authors : Omar H. Jehawi, Siti Rozaimah S. Abdullah, Hassimi A. Hassan, Nadya H. Al Sbani, Nur `Izzati Ismail and Saleh O.A. Handi
Abstract: Hybrid Reed Bed Constructed Wetland system (HRBCWs) for domestic wastewater treatment has been proven to be effective and as an alternative for conventional wastewater treatment technologies. Combination of constructed wetlands enhances pollutant removal efficiency as hybrid CWs could cover the limitation of each single (CWs). In our study, we employed a HRBCWs in three-stages, consisting of a Surface-Flow (SF) system followed by a Vertical-Flow (VF) system and finally by a Horizontal-Flow (HF) system. The system was planted with Scirpus grossus plant that could survive and reproduce with a continuous feed of 86.5 L/day of the raw wastewater. The results indicate that, the system with a 3 days HRT and different sizes of gravels can achieve average removal of 85% NH4-N and 71% PO4-P. Also, the kinetic removal were investigated as absorbents in laboratory scale experimental, the results showed that the qe, k1 were found to be 132.68 mg NH4-N/g biomass and 0.46 d–1 for the surface flow system and 152.76 mg NH4-N/g biomass and 0.53 dG1 for the vertical flow system, respectively and 34.99 mg NH4-N/g biomass and 0.35 d–1 for the horizontal flow system with a pseudo-first-order. The NH4-N biosorption by SF, VF and HF were well fitted to the pseudo first-order plot with R2 of 0.99, 0.98 and 0.98 for SF, VF and HF, respectively. The planted HRBCW system shows a better performance than the unplanted system. These results indicate that the HRBCW system using Scirpus grossus plant has a high effectiveness for treating domestic wastewater.
Omar H. Jehawi, Siti Rozaimah S. Abdullah, Hassimi A. Hassan, Nadya H. Al Sbani, Nur `Izzati Ismail and Saleh O.A. Handi, 2019. Kinetic of on Nutrient Removal in Low-Strength Domestic Wastewater under Continuous Operation of Pilot Scale of Hybrid Reed Bed System (SF-VF-HF). Journal of Engineering and Applied Sciences, 14: 9154-9161.