03690ntm a2200337 i 4500 MY-KuUP 20260403124249.0 t||||fr|||| 000 0 ta 260403t20252025my a|||fr|||| 000 0 eng d THE0010430 (Local) Hardback UMPSA eng UMPSA rda FTKA .B35 2025 r Thesis Jiang, Bai Yang, author. Evaluation of constructed wetlands for phytoremediation of treated sewage effluent and biomass production under suboptimal temperature / Jiang Bai Yang Kuantan, Pahang : UMPSA, 2025 © 2025 xv, 150 pages : illustrations (some color) ; 30 cm. + 1 CD-ROM rdacontent text rdamedia unmediated rdacarrier volume rda text file PDF Faculty of Civil Engineering Technology Thesis (Doctor of Philosophy in Civil Engineering) -- Universiti Malaysia Pahang Al Sultan Abdullah - 2025 Includes bibliographical references Constructed wetlands (CWs) are widely recognized as sustainable solutions for advanced wastewater treatment, particularly in regions facing cold climates and stringent water quality standards. In China, despite the expansion of municipal wastewater treatment plants (WWTPs), effluents from secondary treatment often fail to meet surface water quality standards (GB 3838-2002), especially during winter when low temperatures reduce microbial activity and hinder treatment efficiency. This study addresses this problem by evaluating the effectiveness of horizontal subsurface flow CWs (HFCWs) planted with Phragmites australis, Scirpus validus, and Typha orientalis under simulated winter conditions. The main objectives were to assess pollutant removal (COD and TN), monitor greenhouse gas (GHG) emissions (CO₂, CH₄, N₂O), analyze heavy metal accumulation and translocation, and conduct a life cycle assessment (LCA) incorporating biomass utilization strategies. Experiments were conducted in controlled tanks using treated WWTP effluent, and water and gas samples were analyzed using standard national methods and gas chromatography. Heavy metals (Pb, Zn, Cr, Mn) were measured via ICP, and global warming potential (GWP) was calculated in CO₂ equivalents. Two biomass reuse scenarios: animal feed and anaerobic digestion, were compared for sustainability. Results showed that S. validus had the highest COD and TN removal (40.16% and 34.88%, respectively), and the lowest GWP (3.086±0.741 mg/m2/h), while T orientalis emitted more CO₂ and GWP (178.30±11.72 mg/m2/h and 6.632±0.691 mg/m2/h, respectively). Metal uptake varied among species, the BAQ for different plant parts follows the same order: Zn > Mn > Pb > Cr, the high BCF values (>1) observed indicate strong accumulation potential, with roots acting as primary sinks (TF<1), reducing translocation to aboveground parts. LCA revealed that construction had the highest environmental burden, while biofertilizer or organic fertilizer offered better overall sustainability benefits than animal feed uses in three categories: Human Health, Climate Change, and Resources. This study contributes new insights on CW performance under winter conditions, offering practical recommendations for integrating CWs into 吖 cold-region wastewater systems. The findings support national CW guidelines and promote lowemission, circular wastewater solutions. Faculty of Civil Engineering Technology Dissertations Universities and colleges Dissertations Theses Dissertations lcc THESIS 0 0 lcc 0 1 0 10000 10000 2026-04-03 0 FTKA .B35 2025 r Thesis T000004750 2026-04-03 12:43:11 1 2026-04-03 RESTRICT 0 0 lcc 0 1 0 10000 10000 2026-04-03 0 CD13976 T000004751 2026-04-03 12:44:20 2026-04-03 RESTRICT 104571 104577