White hard clam (Meretrix lyrata) shells media to improve phosphorus removal in lab-scale horizontal sub-surface flow constructed wetlands: Performance, removal pathways, and lifespan. (September 2020)

• Record Type: Journal Article
• Authors: Nguyen, T.A.H.; Ngo, H.H.; Guo, W.S.; Nguyen, T.H.H.; Soda, S.; Vu, N.D.; Bui, T.K.A.; Vo, T.D.H.; Bui, X.T.; Nguyen, T.T.; Pham, T.T.
• Is Part Of: Bioresource technology. Volume 312(2020)
• Publication Date: 2020-09
• Subjects: Anaerobically digested swine wastewater -- Ca-rich materials -- Lifespan -- Phosphorus removal efficiency -- Removal pathways; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2020.123602
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: P removal from simulated wastewater using lab-scale HSSF-CWs was examined. Paspalum atratum was utilized as the emergent wetland plant for very first time. WHC-based HSSF-CW planted with Paspalum atratum removed up to 89.9% of inflow P. WHC sorption was the dominant P removal pathway in HSSF-CWs. Utilizing WHC as a reactive filter media apparently extended lifespans of HSSF-CWs. Abstract: 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 2 /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.