Vietnam Japan University (VNU-VJU), Vietnam National University, Hanoi, Luu Huu Phuoc St., Nam Tu Liem Dist., Hanoi 101000, Viet Nam.
Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney (UTS), 15 Broadway, Ultimo, NSW 2007, Australia.
Bioresour Technol. 2020 Sep;312:123602. doi: 10.1016/j.biortech.2020.123602. Epub 2020 May 30.
This work examined the phosphorus (P) removal from the synthetic pretreated swine wastewater using lab-scale horizontal sub-surface flow constructed wetlands (HSSF-CWs). White hard clam (Meretrix lyrata) shells (WHC) and Paspalum atratum were utilized as substrate and plant, respectively. The focus was placed on treatment performance, removal mechanisms and lifespan of the HSSF-CWs. Results indicated that WHC-based HSSF-CW with P. atratum exhibited a high P removal (89.9%). The mean P efluent concentration and P removal rate were 1.34 ± 0.95 mg/L and 0.32 ± 0.03 g/m/d, respectively. The mass balance study showed that media sorption was the dominant P removal pathway (77.5%), followed by microbial assimilation (14.5%), plant uptake (5.4%), and other processes (2.6%). It was estimated the WHC-based bed could work effectively for approximately 2.84 years. This WHC-based HSSF-CWs technology will therefore pave the way for recycling Ca-rich waste materials as media in HSSF-CWs to enhance P-rich wastewater purification.
本研究采用实验室规模水平潜流人工湿地（HSSF-CWs），考察了磷（P）从预处理过的合成猪废水中的去除效果。利用文蛤（Meretrix lyrata）壳（WHC）和假俭草（Paspalum atratum）作为基质和植物。研究重点是 HSSF-CWs 的处理性能、去除机制和寿命。结果表明，基于 WHC 的 HSSF-CW 与 P. atratum 表现出高磷去除率（89.9%）。平均磷出水中浓度和磷去除率分别为 1.34 ± 0.95 mg/L 和 0.32 ± 0.03 g/m/d。质量平衡研究表明，介质吸附是主要的磷去除途径（77.5%），其次是微生物同化（14.5%）、植物吸收（5.4%）和其他过程（2.6%）。估计基于 WHC 的床可以有效工作约 2.84 年。因此，这项基于 WHC 的 HSSF-CWs 技术将为回收富含 Ca 的废物作为 HSSF-CWs 中的介质铺平道路，以增强富磷废水的净化。
