干旱区生态环境知识资源中心(Arid): Operational modifications of a full-scale experimental vertical flow constructed wetland with effluent recirculation to optimize total nitrogen removal

Arid

DOI	10.1016/j.jclepro.2021.126558
	Operational modifications of a full-scale experimental vertical flow constructed wetland with effluent recirculation to optimize total nitrogen removal
	Al-Wahaibi, Buthaina Mahfoud; Jafary, Tahereh; Al-Mamun, Abdullah; Baawain, Mahad Said; Aghbashlo, Mortaza; Tabatabaei, Meisam; Stefanakis, Alexandros I.
通讯作者	Al-Mamun, A (corresponding author), Sultan Qaboos Univ, Dept Civil & Architectural Engn, POB 33, Muscat 123, Oman.
来源期刊	JOURNAL OF CLEANER PRODUCTION
ISSN	0959-6526
EISSN	1879-1786
出版年	2021
卷号	296
英文摘要	A full-scale Vertical Flow Constructed Wetland (VFCW) was designed, built, and put into operation in Oman to provide a sustainable wastewater treatment solution within the Middle Eastern context. The VFCW had two stages (vertical flow 1 and 2; called VF1 and VF2, respectively) with a total treatment area of 995 m2 and was planted with common reeds (Phragmites australis), while the treated effluent was recirculated to an anoxic tank. The VFCW was continuously fed with high-strength domestic wastewater for 1.5 years (January 2017eJune 2018). The study was divided into two phases: the first phase (Baseline) aimed at evaluating the treatment performance, and the second phase (Modification) aimed at testing different operational modifications to optimize the total nitrogen removal and deal with the nitrified treated effluent. Samples were collected at the inlet buffer tank and VF2 outlet daily during the first phase and weekly during the second phase. Overall, high removal rates obtained for total suspended solids (99.6%), biological oxygen demand (98.7%), chemical oxygen demand (97.8%), ammonia nitrogen (99.5%), total phosphorus (97.2%), and pathogens (99.9%) complied with the Oman Irrigation Standard A. However, limited denitrification was the main challenge since the effluent's total nitrogen value (25 mg/ L) remained above the legal limit. Therefore, several operational modifications were tested, such as increasing the hydraulic retention time in the anoxic tank, increasing the saturation in VF2 beds, the step-feeding of raw wastewater, and the addition of an external carbon source. The step-feeding with artificial carbon dosing resulted in the desired nitrate reduction, i.e., below 11.3 mg/L according to the irrigation standard. This research study is among the first VFCW carried out on a full-scale to optimize its performance under a hot and arid climate. (c) 2021 Elsevier Ltd. All rights reserved. Superscript/Subscript Available
英文关键词	Vertical flow constructed wetland Recirculation Step-feeding Denitrification Nitrogen removal
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000672225100072
WOS关键词	WASTE-WATER ; MANAGEMENT ; AERATION
WOS类目	Green & Sustainable Science & Technology ; Engineering, Environmental ; Environmental Sciences
WOS研究方向	Science & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368777
作者单位	[Al-Wahaibi, Buthaina Mahfoud; Al-Mamun, Abdullah] Sultan Qaboos Univ, Dept Civil & Architectural Engn, POB 33, Muscat 123, Oman; [Al-Wahaibi, Buthaina Mahfoud] Haya Water Oman Wastewater Serv Co SAOC, Res & Dev, Muscat, Oman; [Jafary, Tahereh] Int Maritime Coll, Proc Engn Dept, Sohar, Oman; [Baawain, Mahad Said] Minist Labor, Muscat, Oman; [Aghbashlo, Mortaza] Univ Tehran, Coll Agr & Nat Resources, Fac Agr Engn & Technol, Dept Mech Engn Agr Machinery, Tehran, Iran; [Tabatabaei, Meisam] Univ Malaysia Terengganu, Higher Inst Ctr Excellence HICoE, Inst Trop Aquaculture & Fisheries AKUATROP, Terengganu 21030, Malaysia; [Tabatabaei, Meisam] Agr Res Educ & Extens Org, Agr Biotechnol Res Inst Iran, Microbial Biotechnol Dept, Karaj, Iran; [Stefanakis, Alexandros I.] Tech Univ Crete, Sch Environm Engn, Khania 73100, Greece
推荐引用方式 GB/T 7714	Al-Wahaibi, Buthaina Mahfoud,Jafary, Tahereh,Al-Mamun, Abdullah,et al. Operational modifications of a full-scale experimental vertical flow constructed wetland with effluent recirculation to optimize total nitrogen removal[J],2021,296.
APA	Al-Wahaibi, Buthaina Mahfoud.,Jafary, Tahereh.,Al-Mamun, Abdullah.,Baawain, Mahad Said.,Aghbashlo, Mortaza.,...&Stefanakis, Alexandros I..(2021).Operational modifications of a full-scale experimental vertical flow constructed wetland with effluent recirculation to optimize total nitrogen removal.JOURNAL OF CLEANER PRODUCTION,296.
MLA	Al-Wahaibi, Buthaina Mahfoud,et al."Operational modifications of a full-scale experimental vertical flow constructed wetland with effluent recirculation to optimize total nitrogen removal".JOURNAL OF CLEANER PRODUCTION 296(2021).