Biochemical performance modelling of non-vegetated and vegetated vertical subsurface-flow constructed wetlands treating municipal wastewater in hot and dry climate

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Rahi, Muna A.University of Baghdad, Iraq (author)

Biochemical performance modelling of non-vegetated and vegetated vertical subsurface-flow constructed wetlands treating municipal wastewater in hot and dry climate

Article/chapterEnglish2020

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Elsevier BV,2020

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LIBRIS-ID:oai:lup.lub.lu.se:7a01e3c5-e609-44f5-a580-f78e107743ae
https://lup.lub.lu.se/record/7a01e3c5-e609-44f5-a580-f78e107743aeURI
https://doi.org/10.1016/j.jwpe.2019.101003DOI

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Language:English
Summary in:English

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Wastewater treatment and subsequent effluent recycling for non-drinking purposes such as irrigation contributes to the mitigation of the pressure on freshwater resources. In this study, two vertical sub-surface flow constructed wetland (VSSF-CW) pilot plants were operated to treat municipal wastewater and their effluents were reused for irrigation purposes. One of the wetlands was vegetated with Phragmites australis (Cav.) Trin. ex Steud. (common reed) to compare its efficiency of pollutant removals with the non-vegetated system, which had the same design. COMSOL Multiphysics 3.5a was operated for the Activated Sludge Model 2 (ASM2) to predict the chemical oxygen demand (COD) and ammonia-nitrogen (NH4-N) concentrations. The effluent quality of both treatment systems was assessed for several parameters. Computer simulations show a good compliance between the measured and predicted values of COD and NH4-N for the vegetated system. The calibrated model could be effectively used to predict the behaviours of those parameters as a function of time. Moreover, the effluents of both vegetated (VFp) and non-vegetated (VF) VSSF-CW were significantly (p < 0.05) improved compared to influent. Significant (p < 0.05) effects due to the presence of P. australis were observed for removals of total suspended solids (TSS), 5-day biochemical oxygen demand (BOD5), COD, NH4-N and ortho-phosphate-phosphorus (PO4-P). However, significant increases (p < 0.05) were noted for electrical conductivity (EC), total dissolved solids (TDS), nitrate-nitrogen (NO3-N) and sulphate (SO4) of both effluents compared to the raw wastewater. Except for EC, NH4-N and SO4, all water quality parameters complied with irrigation water standards.

Subject headings and genre

TEKNIK OCH TEKNOLOGIER Samhällsbyggnadsteknik Vattenteknik hsv//swe
ENGINEERING AND TECHNOLOGY Civil Engineering Water Engineering hsv//eng
TEKNIK OCH TEKNOLOGIER Miljöbioteknik Vattenbehandling hsv//swe
ENGINEERING AND TECHNOLOGY Environmental Biotechnology Water Treatment hsv//eng
Activated sludge model
Domestic wastewater
Nutrients
Phragmites australis
Reed bed

Added entries (persons, corporate bodies, meetings, titles ...)

Faisal, Ayad A.H.University of Baghdad, Iraq (author)
Naji, Laith A.University of Baghdad, Iraq (author)
Almuktar, Suahd A.University of Basrah,University of Salford (author)
Abed, Suhail N.University of Salford (author)
Scholz, MiklasLund University,Lunds universitet,Avdelningen för Teknisk vattenresurslära,Institutionen för bygg- och miljöteknologi,Institutioner vid LTH,Lunds Tekniska Högskola,Division of Water Resources Engineering,Department of Building and Environmental Technology,Departments at LTH,Faculty of Engineering, LTH,University of Johannesburg,University of Salford(Swepub:lu)mi6686sc (author)
University of Baghdad, IraqUniversity of Basrah (creator_code:org_t)

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In:Journal of Water Process Engineering: Elsevier BV332214-7144

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ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Civil Engineerin ...; and Water Engineerin ...

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