Nitrogen removal from wastewater in vertical flow constructed wetlands containing LWA/gravel layers and reed vegetation

Bialowiec, Andrzej, Janczukowicz, Wojciech and Randerson, Peter Frederick ORCID: https://orcid.org/0000-0002-2744-3122 2011. Nitrogen removal from wastewater in vertical flow constructed wetlands containing LWA/gravel layers and reed vegetation. Ecological Engineering 37 (6) , pp. 897-902. 10.1016/j.ecoleng.2011.01.013

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Abstract

The influence of light weight aggregates made of fly ash from sewage sludge thermal treatment (FASSTT LWA) on the nitrogen removal efficiency from artificial wastewater in constructed wetlands (CW) with vertical flow reed bed was investigated. Thirty lysimeters with six different double-layer bed constructions (upper layer of FASSTT LWA with thicknesses of: 0 cm, 12 cm, 25 cm, 50 cm, and 100 cm of the total depth of the lysimeter, above a lower gravel layer), either with or without reed plants were operated with wastewater hydraulic loading rate of 4.67 mm/d. During a six-month experiment, high efficiency of ammonia removal was observed. The influence of FASSTT LWA as a bed material and the presence of reed on CW treatment efficiency was determined. The highest total nitrogen removal efficiency, 59.5%, was obtained in the CW with double-layer lysimeters consisting of 25% FASSTT LWA (upper layer), and 75% gravel (lower layer), and planted with reed.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Biosciences
Subjects:	Q Science > QR Microbiology
Uncontrolled Keywords:	sewage sludge thermal treatment; fly ash; light weight aggregates; constructed wetlands; reed; nitrogen removal
Publisher:	Elsevier
ISSN:	0925-8574
Last Modified:	19 Oct 2022 08:55
URI:	https://orca.cardiff.ac.uk/id/eprint/19475

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