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Academic literature on the topic 'Schoenoplectus validus'

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Published: 4 June 2021
Last updated: 19 February 2023

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Journal articles on the topic "Schoenoplectus validus"

1

Tanner, Chris C. "Growth and nutrition of Schoenoplectus validus in agricultural wastewaters." Aquatic Botany 47, no. 2 (February 1994): 131–53. http://dx.doi.org/10.1016/0304-3770(94)90010-8.

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2

Pollard, Peter C. "Bacterial activity in plant (Schoenoplectus validus) biofilms of constructed wetlands." Water Research 44, no. 20 (December 2010): 5939–48. http://dx.doi.org/10.1016/j.watres.2010.07.047.

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3

Zhang, Zhenhua, Zed Rengel, and Kathy Meney. "Kinetics of ammonium, nitrate and phosphorus uptake by Canna indica and Schoenoplectus validus." Aquatic Botany 91, no. 2 (August 2009): 71–74. http://dx.doi.org/10.1016/j.aquabot.2009.02.002.

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4

Tanner, Chris C. "Treatment of Dairy Farm Wastewaters in Horizontal and Up-Flow Gravel-Bed Constructed Wetlands." Water Science and Technology 29, no. 4 (February 1, 1994): 85–93. http://dx.doi.org/10.2166/wst.1994.0164.

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The treatment performance of four horizontal and two up-flow pilot-scale constructed wetlands planted with Schoenoplectus validus were investigated over a 20 month period (two winters and two summers) treating dairy parlour wastewaters at a range of loading rates. Removal of BOD.TN and TP were positively correlated with retention time. Reduction of BOD (70 - 90%) and SS (40 - 90%) in relation to loading rate were similar in both flow formats. The horizontal-flow wetlands showed 40 - 90 % reduction of TN and 30 - 80 % reduction of TP. The up-flow wetlands showed reduced levels of TN and TP removal, particularly when the loading rates were increased during the latter 5 months of the trial. Results are compared with those of other published studies of horizontal and upflow wetlands treating NH4-N rich organic wastewaters.
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Zhang, Zhenhua, Zed Rengel, and Kathy Meney. "Growth and resource allocation of Canna indica and Schoenoplectus validus as affected by interspecific competition and nutrient availability." Hydrobiologia 589, no. 1 (June 13, 2007): 235–48. http://dx.doi.org/10.1007/s10750-007-0733-3.

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6

Lund, M. A., P. S. Lavery, and R. F. Froend. "Removing filterable reactive phosphorus from highly coloured stormwater using constructed wetlands." Water Science and Technology 44, no. 11-12 (December 1, 2001): 85–92. http://dx.doi.org/10.2166/wst.2001.0813.

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A constructed wetland design, consisting of 16 repeating cells was proposed for Henley Brook (Perth, Western Australia) to optimise the removal of FRP from urban stormwater. Three replicate experimental ponds (15×5 m), were constructed to represent at a 1:1 scale a single cell from this design. Three 5 m zones of each pond were sampled: shallow (0.3 m) vegetated (Schoenoplectus validus) inflow and outflow zones and a deeper (1 m), V-shaped central zone. In 1998/99, inflows and outflow waters were intensively sampled and analysed for FRP and Total P. In addition, all major pools of P (plants, sediment) within the ponds, and important P removal processes (benthic flux, uptake by biofilm and S. validus) were quantified. A removal efficiency of 5% (1998) and 10% (1999) was obtained for FRP. Initial uptake was mainly in plant biomass, although the sediment became an increasingly important sink. Benthic flux experiments showed that anoxia did not cause release of P from sediments, indicating that most of the P was bound as apatite rather than associated with Fe or Mn. The highly coloured waters were believed responsible for the very low biofilm biomass recorded (<1 g.m-2). We have demonstrated that constructed wetlands can be effective for removing FRP immediately after construction, although their long-term removal capacity needs further research.
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7

Heritage, Alan, Pino Pistillo, K. P. Sharma, and I. R. Lantzke. "Treatment of primary-settled urban sewage in pilot-scale vertical flow wetland filters: comparison of four emergent macrophyte species over a 12 month period." Water Science and Technology 32, no. 3 (August 1, 1995): 295–304. http://dx.doi.org/10.2166/wst.1995.0152.

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The treatment of primary treated urban sewage by four emergent macrophytes has been compared over a twelve month period in separate gravel-based vertical flow constructed wetlands (300 litre interstitial volume). Nutrient removal in planted systems was greater than in the unplanted wetland especially for nitrogen and phosphorus and less so for BOD and suspended solids removal. The performance of most planted wetlands (especially Typha orientalis and Schoenoplectus validus) declined into autumn, particularly for nitrogen and phosphorus removal while a decline in plant ET was also observed. Baumea articulata, and to a lesser extent Cyperus involucratus, maintained high ET and nutrient assimilation throughout the trial period. As a consequence of the higher ET, dissolved solids (especially fixed salts) doubled in concentration during flow through wetlands planted with these two species, producing an effluent with a high sodium adsorption ratio and a reduced potential for re-use in irrigation.
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8

Thomas, P. R., P. Glover, and T. Kalaroopan. "An evaluation of pollutant removal from secondary treated sewage effluent using a constructed wetland system." Water Science and Technology 32, no. 3 (August 1, 1995): 87–93. http://dx.doi.org/10.2166/wst.1995.0129.

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Pilot scale investigations were carried out to examine the pollutant removal efficiency of a constructed wetland receiving secondary treated sewage effluent. Four constructed wetland cells were established, three of them planted with either Schoenoplectus validus, Juncus ingens or both species of macrophytes, and the fourth serving as an unvegetated control cell. Although there was a significant improvement in the effluent quality during the initial ten month period of monitoring, results to date have not indicated any overall trend for pollutant removal by a particular plant species. Biochemical oxygen demand and chemical oxygen demand removals averaged between 71-75% while suspended solids removals were around 85% in the macrophyte cells. Ammonia reductions were in the range 17-24% but better nitrate reductions between 65-80% were obtained. Phosphorus removal has been low (13%) in all four of the wetland cells and bore hole samples have shown no groundwater contamination with nitrogen or phosphorus from the wetland system to date.
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9

Zhang, Zhenhua, Zed Rengel, and Kathy Meney. "Nutrient Removal from Simulated Wastewater Using Canna indica and Schoenoplectus validus in Mono- and Mixed-Culture in Wetland Microcosms." Water, Air, and Soil Pollution 183, no. 1-4 (February 7, 2007): 95–105. http://dx.doi.org/10.1007/s11270-007-9359-3.

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10

Zhang, Zhenhua, Zed Rengel, and Kathy Meney. "Interactive effects of nitrogen and phosphorus loadings on nutrient removal from simulated wastewater using Schoenoplectus validus in wetland microcosms." Chemosphere 72, no. 11 (August 2008): 1823–28. http://dx.doi.org/10.1016/j.chemosphere.2008.05.014.

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Dissertations / Theses on the topic "Schoenoplectus validus"

1

Roe, Brett, and b. roe@cqu edu au. "Ecologically Engineered Primary Production in Central Queensland, Australia - Integrated Fish and Crayfish Culture, Constructed Wetlands, Floral Hydroponics, and Industrial Wastewater." Central Queensland University. Sciences, 2005. http://library-resources.cqu.edu.au./thesis/adt-QCQU/public/adt-QCQU20080717.092551.

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The issue of sustainability has greatest significance in the midst of unilateral bio-socioeconomic degradation resulting from intense and increasing societal pressures placed on the unified global ecology. In such an environment, sustainable development seeks to manage natural resources within a free market economy, aiming to meet the needs of today's population, and to protect and enhance current resource quality and abundance. In this light, techniques of integrated sustainable primary production and wastewater management are the subject matters of this applied research. There are many researchable issues which could be addressed within the subject matter. The first focus in the research scope was driven by the most severe sustainability issue facing Central Queensland (Australia) in 2000: the depletion and degradation of freshwater supplies. Central Queensland (CQ) is an arid sub-tropical region that has suffered from a marked reduction in rainfall and increase in temperature over the last 100 years, {Miles, 2004 #172}, and by the year 2000, conditions had been exacerbated by eight years of severe drought and warmer than average temperatures and resulted in widespread animal and crop failures due to freshwater shortages. Such a problem required a multi-faceted ecological, social, and economic approach. Hence, research centred on investigating the science of integrating regional water-related industries and agribusiness, and biodiverse ecosystems to achieve water and wastewater reuse applications, and associated eco-socioeconomic benefits. Specifically, this research investigates the integration of (a) electrical power station wastewater (b) barramundi culture, (c) red claw culture, (d) constructed wetlands (for water quality management and habitat creation), and (e) hydroponic flower culture. This research produced outcomes of integrated water and wastewater reuse and recycling, marketable agriproducts production (fish, crayfish, and flowers), water and wastewater reuse and conservation, wetland primary production, carbon dioxide sequestration, aquatic pollution control, and biodiversity creation and support. Successful design and management, experimental trialing and evaluation of system components and subjects, and the development of a knowledge base including static and dynamic system models, represent advances in respective research areas, and underpin the emerging discipline of integrated systems approaches to eco-socioeconomic development. Additionally, several gaps in the current body of knowledge regarding integrated systems were filled, and interactive management tools were developed. Apart from this study, the integration of technologies (as described above) has not, to this author's knowledge, been accomplished.
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2

Zhang, Zhenhua. "Plant growth and nutrient removal in simulated secondary-treated municipal wastewater in wetland microcosmos." University of Western Australia. School of Earth and Geographical Sciences, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0141.

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[Truncated abstract] The use of constructed wetlands for tertiary purification of municipal wastewater has received increasing attention around the world because direct discharge of secondary-treated municipal wastewater to water bodies has caused eutrophication. Plant species selection and vegetation management may enhance nutrient removal efficiency in constructed wetlands. However, there is a lack of knowledge on the relations between plant growth and nutrient removal efficiency in constructed wetlands. The objective of this study is to better understand how plant growth and resource allocation are influenced by nutrients in wastewater and how nutrient removal efficiencies are affected by plant species and vegetation management. The preliminary experiment was conducted to select macrophytes, especially ornamental species, to grow in the wastewater in the wetland microcosms. Ten plant species, comprising six ornamental species: Alocasia macrorrhiza, Canna indica, Iris louisiana, Lythrum sp., Zantedeschia aethiopica, Zantedeschia sp., and four sedge species: Baumea articulate, Baumea juncea, Carex tereticaulis and Schoenoplectus validus, were planted in the wetland microcosms and fed a simulated wastewater solution in the concentrations similar to the secondary-treated municipal wastewater. C. indica has shown vigorous and healthy growth, and a relatively high potential of rooting-zone aeration and nutrient removal efficiency. B. articulata and S. validus also showed relatively high nutrient removal efficiency. ... The high nutrient availability and optimum N/P ratio were required for stimulating plant growth, resulting in allocation of more resources to above-ground tissues compared to below-ground parts, and enhancing nutrient removal efficiency. Nutrient removal efficiencies were significantly influenced by growth of C. indica and S. validus, nutrient loading rates and N/P ratios in the wastewater. The nutrient uptake kinetics of C. indica and S. validus were investigated to elucidate the differences in nutrient uptake between species. Wetland plant species have shown differential nutrient uptake efficiency and different preferences for inorganic N source, with C. indica preferring NO3-N and S. validus preferring NH4-N. C. indica had greater capacity than S. validus to take up PO4-P when the concentration of PO4-P in the solution was relatively low, whereas S. validus was more capable than C. indica to take up NO3-N when the concentration of NO3-N in the solution was relatively low. The PO4-P uptake capacity was higher in younger than older plants. Overall, the study has suggested that different plant species have differential capacity to take up nutrients. In addition to nutrient uptake, plants have significant other roles in terms of nutrient removal from the wastewater (such as leaking oxygen into the rhizosphere in which oxidation of substances like ammonia can occur). The properly high nutrient availability and optimum N/P ratio are required to stimulate the plant growth, resulting in enhancing the treatment performance in the wetlands. These findings have important implications for improving our ability to engineer ecological solutions to the problems associated with nutrient-rich wastewater.
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3

(9830960), Brett Roe. "Ecologically engineered primary production in Central Queensland, Australia: Integrated fish and crayfish culture, constructed wetlands, floral hydorponics, and industrial wastewater." Thesis, 2005. https://figshare.com/articles/thesis/Ecologically_engineered_primary_production_in_Central_Queensland_Australia_Integrated_fish_and_crayfish_culture_constructed_wetlands_floral_hydorponics_and_industrial_wastewater/13420664.

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Research techniques of integrated sustainable primary production and wastewater management.. "The issue of sustainability has greatest significance in the midst of unilateral bio-socioeconomic degradation resulting from intense and increasing societal pressures placed on the unified global ecology. In such an environment, sustainable development seeks to manage natural resources within a free market economy, aiming to meet the needs of today's population, and to protect and enhance current resource quality and abundance. In this light, techniques of integrated sustainable primary production and wastewater management are the subject matters of this Applied research There are many researchable issues which could be addressed within the subject matter. The first focus in the research scope was driven by the most severe sustainability issue facing Central Queensland (Australia) in 2000: the depletion and degradation of freshwater supplies. Central Queensland (CQ) is an arid sub-tropical region that has suffered from a marked reduction in rainfall and increase in temperature over the last 100 years, (Miles, 2004), and by the year 2000, conditions had been exacerbated by eight years of severe drought and warmer than average temperatures and resulted in widespread animal and crop failures due to freshwater shortages. Such a problem required a multi-faceted ecological, social, and economic approach. Hence, research centred on investigating the science of integrating regional water-related industries and agribusiness, and biodiverse ecosystems to achieve water and wastewater reuse applications, and associated eco-socioeconomic benefits. Specifically, this research investigates the integration of (a) electrical power station wastewater (b) barramundi culture, (c) red claw culture, (d) constructed wetlands (for water quality management and habitat creation), and (e) hydroponic flower culture. This research produced outcomes of integrated water and wastewater reuse and recycling, marketable agriproducts production (fish, crayfish, and flowers), water and wastewater reuse and conservation, wetland primary production, carbon dioxide sequestration, aquatic pollution control, and biodiversity creation and support. Successful design and management, experimental trialing and evaluation of system components and subjects, and the development of a knowledge base including static and dynamic system models, represent advances in respective research areas, and underpin the emerging discipline of integrated systems approaches to eco-socioeconomic development. Additionally, several gaps in the current body of knowledge regarding integrated systems were filled, and interactive management tools were developed. Apart from this study, the integration of technologies (as described above) has not, to this author's knowledge, been accomplished. -- abstract
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