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Research & Development Report: Survival, Growth and Nutrient Removal of Floating Island Plants in High Salinity Wastewater

Ian Dodkins, Anouska Mendzil

Swansea University Author: Ian Dodkins

Abstract

Seven species of coastal plants were grown on artificial floating island material to observe their survival, growth and nutrient removal capacity when suspended in tubs of mariculture wastewater. Saline water presents particular difficulties in survival and growth for mostterrestrial plants. There w...

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Published: 2015
URI: https://cronfa.swan.ac.uk/Record/cronfa20579
first_indexed 2015-04-01T02:05:24Z
last_indexed 2018-02-09T04:57:15Z
id cronfa20579
recordtype SURis
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spelling 2015-03-31T13:38:25.2873730 v2 20579 2015-03-31 Research & Development Report: Survival, Growth and Nutrient Removal of Floating Island Plants in High Salinity Wastewater dfc9d01ae342f680c94e70458bb3f1e6 Ian Dodkins Ian Dodkins true false 2015-03-31 Seven species of coastal plants were grown on artificial floating island material to observe their survival, growth and nutrient removal capacity when suspended in tubs of mariculture wastewater. Saline water presents particular difficulties in survival and growth for mostterrestrial plants. There were three different consecutive phases of around 1 month each, with each phase being a batch process, and surviving plants being transferred to the next phase with a fresh volume of mariculture effluent.1. Only Salicornia europea, Juncus maritimus and Spartina maritimus survived2. Salicornia and Juncus both had good root growth, whereas Spartina looked as if it would die shortly after the end of the experiment.3. Salicornia had the highest root surface area, and thus potentially the greatest surface area for supporting nitrifying or denitrifying bacteria.4. Some stems of Juncus initially died back, but after a month it began growing again. Salicornia had more vigorous growth throughout, resulting in much higher biomass, particularly by the end of the experiment.5. Algal growth dominated the water chemistry, rapidly elevating pH and dissolved oxygen and removing ammonia and phosphorus.6. Despite having less light, algae in the tubs with plants was more dense. Organic acids which are known to be exuded by plants probably encouraged greater algal growth.Salicornia europea, even though it is an annual, is a good candidate for use in floating islands for mariculture wastewater treatment. Juncus maritimus, although it grew more slowly, is also a hardy species for potential use, and once established could offer benefits over Salicornia for nutrient removal as roots would remain throughout the year. It is recommended that very careful consideration of light and oxygenation of saltwater treatment ponds is considered since this will profoundly affect the competitive balance between nitrifying bacteria and algae. ResearchReportExternalBody Mariculture, Aquaculture, Saline, Floating Treatment Wetland, Salicornia, Effluent 1 1 2015 2015-01-01 COLLEGE NANME COLLEGE CODE Swansea University 2015-03-31T13:38:25.2873730 2015-03-31T13:11:05.5252432 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences Ian Dodkins 1 Anouska Mendzil 2
title Research & Development Report: Survival, Growth and Nutrient Removal of Floating Island Plants in High Salinity Wastewater
spellingShingle Research & Development Report: Survival, Growth and Nutrient Removal of Floating Island Plants in High Salinity Wastewater
Ian Dodkins
title_short Research & Development Report: Survival, Growth and Nutrient Removal of Floating Island Plants in High Salinity Wastewater
title_full Research & Development Report: Survival, Growth and Nutrient Removal of Floating Island Plants in High Salinity Wastewater
title_fullStr Research & Development Report: Survival, Growth and Nutrient Removal of Floating Island Plants in High Salinity Wastewater
title_full_unstemmed Research & Development Report: Survival, Growth and Nutrient Removal of Floating Island Plants in High Salinity Wastewater
title_sort Research & Development Report: Survival, Growth and Nutrient Removal of Floating Island Plants in High Salinity Wastewater
author_id_str_mv dfc9d01ae342f680c94e70458bb3f1e6
author_id_fullname_str_mv dfc9d01ae342f680c94e70458bb3f1e6_***_Ian Dodkins
author Ian Dodkins
author2 Ian Dodkins
Anouska Mendzil
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publishDate 2015
institution Swansea University
college_str Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences
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description Seven species of coastal plants were grown on artificial floating island material to observe their survival, growth and nutrient removal capacity when suspended in tubs of mariculture wastewater. Saline water presents particular difficulties in survival and growth for mostterrestrial plants. There were three different consecutive phases of around 1 month each, with each phase being a batch process, and surviving plants being transferred to the next phase with a fresh volume of mariculture effluent.1. Only Salicornia europea, Juncus maritimus and Spartina maritimus survived2. Salicornia and Juncus both had good root growth, whereas Spartina looked as if it would die shortly after the end of the experiment.3. Salicornia had the highest root surface area, and thus potentially the greatest surface area for supporting nitrifying or denitrifying bacteria.4. Some stems of Juncus initially died back, but after a month it began growing again. Salicornia had more vigorous growth throughout, resulting in much higher biomass, particularly by the end of the experiment.5. Algal growth dominated the water chemistry, rapidly elevating pH and dissolved oxygen and removing ammonia and phosphorus.6. Despite having less light, algae in the tubs with plants was more dense. Organic acids which are known to be exuded by plants probably encouraged greater algal growth.Salicornia europea, even though it is an annual, is a good candidate for use in floating islands for mariculture wastewater treatment. Juncus maritimus, although it grew more slowly, is also a hardy species for potential use, and once established could offer benefits over Salicornia for nutrient removal as roots would remain throughout the year. It is recommended that very careful consideration of light and oxygenation of saltwater treatment ponds is considered since this will profoundly affect the competitive balance between nitrifying bacteria and algae.
published_date 2015-01-01T03:37:49Z
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score 11.08976

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