Comparison of grey water treatment performance by a cascading sand filter and a constructed wetland

Kadewa, W. W., Le Corre, K., Pidou, M., Jeffrey, P. J. and Jefferson, B. (2010) Comparison of grey water treatment performance by a cascading sand filter and a constructed wetland. Water Science and Technology, 62 7: 1471-1478. doi:10.2166/wst.2010.395


Author Kadewa, W. W.
Le Corre, K.
Pidou, M.
Jeffrey, P. J.
Jefferson, B.
Title Comparison of grey water treatment performance by a cascading sand filter and a constructed wetland
Journal name Water Science and Technology   Check publisher's open access policy
ISSN 0273-1223
1996-9732
Publication date 2010
Sub-type Article (original research)
DOI 10.2166/wst.2010.395
Volume 62
Issue 7
Start page 1471
End page 1478
Total pages 8
Place of publication London, U.K.
Publisher I W A Publishing
Language eng
Formatted abstract
A novel unplanted vertical flow subsurface constructed wetland technology comprising three shallow beds (0.6 m length, 0.45 m width and 0.2 m depth) arranged in a cascading series and a standard single-pass Vertical Flow Planted Constructed Wetland (VFPCW, 6 m2 and 0.7 m depth) were tested for grey water treatment. Particular focus was on meeting consent for published wastewater reuse parameters and removal of anionic surfactants. Treatment performance at two hydraulic loading rates (HLR) of 0.08, and 0.17 m3 m-2 d-1 were compared. Both technologies effectively removed more than 90% turbidity and more than 96% for organics with the prototype meeting the most stringent reuse standard of <2 NTU and <10 mg/L. However, surfactant removal in the VFPCW was higher (76–85%) than in the prototype which only achieved more than 50% removal at higher loading rate. Generally, the prototype performed consistently better than the VFPCW except for surfactant removal. However, at higher loading rates, both systems did not meet the reuse standard of <1 mg L-1 for anionic surfactants. This observation confirms that shallow beds provide a more oxidised environment leading to higher BOD5 and COD removals. Presence of plants in the VFPCW led to higher anionic surfactant removal, through increased microbial and sorption processes.
Keyword Cascading wetland beds
Constructed sand filter
Grey water
Shallow beds wetland
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: ERA 2012 Admin Only
Advanced Water Management Centre Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 6 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 5 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Wed, 19 Oct 2011, 16:40:32 EST by System User on behalf of Advanced Water Management Centre