Wastewater treatment and biomass growth of eight plants for shallow bed wetland roofs

Thi-Dieu-Hien Vo; Xuan-Thanh Bui; Dinh-Duc Nguyen; Van-Truc Nguyen; Huu-Hao Ngo; Wenshan Guo; Phuoc-Dan Nguyen; Cong-Nguyen Nguyen; Chitsan Lin

doi:10.1016/j.biortech.2017.09.194

Wastewater treatment and biomass growth of eight plants for shallow bed wetland roofs

Bioresour Technol. 2018 Jan:247:992-998. doi: 10.1016/j.biortech.2017.09.194. Epub 2017 Oct 4.

Authors

Thi-Dieu-Hien Vo¹, Xuan-Thanh Bui², Dinh-Duc Nguyen³, Van-Truc Nguyen⁴, Huu-Hao Ngo⁵, Wenshan Guo⁵, Phuoc-Dan Nguyen⁶, Cong-Nguyen Nguyen⁷, Chitsan Lin⁸

Affiliations

¹ Environmental Engineering and Management Research Group, Ton Duc Thang University, Ho Chi Minh City, Viet Nam; Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Viet Nam.
² Faculty of Environment and Natural Resources, University of Technology, Vietnam National University - Ho Chi Minh, Viet Nam. Electronic address: [email protected].
³ Department of Environmental Energy & Engineering, Kyonggi University, 442-760, Republic of Korea.
⁴ Institute of Research and Development, Duy Tan University, 03 Quang Trung, Da Nang, Viet Nam.
⁵ School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, NSW 2007, Australia.
⁶ Faculty of Environment and Natural Resources, University of Technology, Vietnam National University - Ho Chi Minh, Viet Nam.
⁷ Faculty of Environment and Natural Resources, Da Lat University, Da Lat, Viet Nam.
⁸ Department of Marine Environmental Engineering, National Kaohsiung Marine University, Kaohsiung 81157, Taiwan.

PMID: 30060439
DOI: 10.1016/j.biortech.2017.09.194

Abstract

Wetland roof (WR) could bring many advantages for tropical cities such as thermal benefits, flood control, green coverage and domestic wastewater treatment. This study investigates wastewater treatment and biomass growth of eight local plants in shallow bed WRs. Results showed that removal rates of WRs were 21-28 kg COD ha^-1 day^-1, 9-13 kg TN ha^-1 day^-1 and 0.5-0.9 kg TP ha^-1 day^-1, respectively. The plants generated more biomass at lower hydraulic loading rate (HLR). Dry biomass growth was 0.4-28.1 g day^-1 for average HLR of 247-403 m³ ha^-1 day^-1. Green leaf area of the plants was ranging as high as 67-99 m² leaves per m² of WR. In general, the descent order of Kyllinga brevifoliaRottb (WR8), Cyperus javanicus Houtt (WR5) and Imperata cylindrical (WR4) was suggested as effective vegetations in WR conditions in terms of wastewater treatment, dry biomass growth and green coverage ratio.

Keywords: Biomass; Domestic wastewater; Green area; Wetland roof.

MeSH terms

Biomass
Cities
Cyperus
Facility Design and Construction*
Plant Development*
Plants
Waste Disposal, Fluid
Wastewater*
Wetlands*

Substances

Waste Water