Tracer studies of a subsurface flow wetland : a thesis submitted in partial fulfilment of the requirements for the degree of Master of Technology in Environmental Engineering, Massey University

Simple item page
dc.contributor.authorPrasad, Julius Narendra
dc.date.accessioned2017-06-22T20:43:29Z
dc.date.available2017-06-22T20:43:29Z
dc.date.issued1996
dc.description.abstractThe use of constructed wetlands represents an innovative approach to wastewater treatment. However, the treatment performance of constructed wetlands has been variable due to an incomplete knowledge of the hydraulic characteristics. Current design methods idealise constructed wetlands as plug flow reactors ignoring the existence of longitudinal dispersion, short-circuiting and stagnant regions. The overall effect will be a reduction of treatment efficiency at the outlet. This thesis investigates the hydraulic characteristics of a subsurface flow wetland using a fluorescence dye tracer so as to determine the difference between theoretical and actual retention times and their effect on treatment efficiency. A thorough review of the literature is undertaken, firstly examining wetland systems and their treatment mechanisms, it then reviews their hydraulic characteristics and design considerations while finally discussing dye tracing studies. A series of dye tracing trials were undertaken on a pilot scale gravel bed wetland with a theoretical retention time of four days. The results from this research are presented as plots of dye concentration versus time at the outlet. These results are analysed in terms of chemical reactor theory and their implications on performance of various treatment mechanisms is discussed.en_US
dc.identifier.urihttp://hdl.handle.net/10179/11289
dc.language.isoenen_US
dc.publisherMassey Universityen_US
dc.rightsThe Authoren_US
dc.subjectConstructed wetlands -- Design and constructionen_US
dc.subjectSewage -- Purificationen_US
dc.subjectBiological treatmenten_US
dc.subjectLand treatment of wastewateren_US
dc.subjectBiological controlen_US
dc.titleTracer studies of a subsurface flow wetland : a thesis submitted in partial fulfilment of the requirements for the degree of Master of Technology in Environmental Engineering, Massey Universityen_US
dc.typeThesisen_US
massey.contributor.authorPrasad, Julius Narendraen_US
thesis.degree.disciplineEnvironmental Engineeringen_US
thesis.degree.grantorMassey Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Technology (M. Tech.)en_US
Files
Original bundle
Now showing 1 - 2 of 2
Thumbnail Image
Name:
01_front.pdf
Size:
1.05 MB
Format:
Adobe Portable Document Format
Description:
Download
Thumbnail Image
Name:
02_whole.pdf
Size:
17.32 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
3.32 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Theses and Dissertations