Cold Season Nitrogen Removal in a High Loaded Free Water Surface Wetland with Emergent Vegetation

2008 ◽  
pp. 223-236 ◽  
Author(s):  
Christer Svedin ◽  
Sofia Kallner Bastviken ◽  
Karin S. Tonderski
Keyword(s):  
Nitrogen Removal ◽  
Water Surface ◽  
Free Water ◽  
Cold Season ◽  
Emergent Vegetation ◽  
Free Water Surface ◽  
Surface Wetland

scholarly journals Spatial Changes in Microbial Communities along Different Functional Zones of a Free-Water Surface Wetland

2020 ◽  
Vol 8 (10) ◽  
pp. 1604
Author(s):  
Mikhail V. Semenov ◽  
George S. Krasnov ◽  
Ksenia Y. Rybka ◽  
Sergey L. Kharitonov ◽  
Yulia A. Zavgorodnyaya ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetlands ◽  
Organic Pollutants ◽  
Water Surface ◽  
Particle Diameter ◽  
Free Water ◽  
Free Water Surface ◽  
Spatial Changes ◽  
Functional Zones ◽  
Surface Wetland

Constructed wetlands (CWs) are complicated ecosystems that include vegetation, sediments, and the associated microbiome mediating numerous processes in wastewater treatment. CWs have various functional zones where contrasting biochemical processes occur. Since these zones are characterized by different particle-size composition, physicochemical conditions, and vegetation, one can expect the presence of distinct microbiomes across different CW zones. Here, we investigated spatial changes in microbiomes along different functional zones of a free-water surface wetland located in Moscow, Russia. The microbiome structure was analyzed using Illumina MiSeq amplicon sequencing. We also determined particle diameter and surface area of sediments, as well as chemical composition of organic pollutants in different CW zones. Specific organic particle aggregates similar to activated sludge flocs were identified in the sediments. The highest accumulation of hydrocarbons was found in the zones with predominant sedimentation of fine fractions. Phytofilters had the highest rate of organic pollutants decomposition and predominance of Smithella, Ignavibacterium, and Methanothrix. The sedimentation tank had lower microbial diversity, and higher relative abundances of Parcubacteria, Proteiniclasticum, and Macellibacteroides, as well as higher predicted abundances of genes related to methanogenesis and methanotrophy. Thus, spatial changes in microbiomes of constructed wetlands can be associated with different types of wastewater treatment processes.

scholarly journals Biokinetic model for nitrogen removal in free water surface constructed wetlands

2017 ◽  
Vol 587-588 ◽  
pp. 145-156 ◽  
Author(s):  
S. Gargallo ◽  
M. Martín ◽  
N. Oliver ◽  
C. Hernández-Crespo
Keyword(s):  
Constructed Wetlands ◽  
Nitrogen Removal ◽  
Water Surface ◽  
Free Water ◽  
Free Water Surface ◽  
Biokinetic Model

Heavy Metal Behaviour in an Experimental Free Water Surface Wetland in the Venice Lagoon Watershed

2007 ◽  
Vol 183 (1-4) ◽  
pp. 143-151 ◽  
Author(s):  
Erika Mattiuzzo ◽  
Laura Favero ◽  
Francesca Zennaro ◽  
Daniel Franco
Keyword(s):  
Heavy Metal ◽  
Water Surface ◽  
Free Water ◽  
Venice Lagoon ◽  
Free Water Surface ◽  
Surface Wetland

scholarly journals Effects of Oenanthe javanica on Nitrogen Removal in Free-Water Surface Constructed Wetlands under Low-Temperature Conditions

2019 ◽  
Vol 16 (8) ◽  
pp. 1420 ◽  
Author(s):  
Song ◽  
Wang ◽  
Liu ◽  
Zhao ◽  
An
Keyword(s):  
Constructed Wetlands ◽  
Nitrogen Removal ◽  
Nitrite Reductase ◽  
Water Surface ◽  
Eastern China ◽  
Free Water ◽  
Free Water Surface ◽  
Nitrite Reductase Gene ◽  
Reductase Gene ◽  
Oenanthe Javanica

To investigate the role and microorganism-related mechanisms of macrophytes and assess the feasibility of Oenanthe javanica (Blume) DC. in promoting nitrogen removal in free-water surface constructed wetlands (FWS-CWS) under low temperatures (<10 °C), pilot-scale FWS-CWS, planted with O. javanica, were set up and run for batch wastewater treatment in eastern China during winter. The presence of macrophytes observably improved the removal rates of ammonia nitrogen (65%–71%) and total nitrogen (41%–48%) (p < 0.05), with a sharp increase in chemical oxygen demand concentrations (about 3–4 times). Compared to the unplanted systems, the planted systems not only exhibited higher richness and diversity of microorganisms, but also significantly higher abundances of bacteria, ammonia monooxygenase gene (amoA), nitrous oxide reductase gene (nosZ), dissimilatory cd1-containing nitrite reductase gene (nirS), and dissimilatory copper-containing nitrite reductase gene (nirK) in the substrate. Meanwhile, the analysis of the microbial community composition further revealed significant differences. The results indicate that enhanced abundances of microorganisms, and the key functional genes involved with nitrogen metabolism in the planted systems played critical roles in nitrogen removal from wastewater in FWS-CWS. Furthermore, abundant carbon release from the wetland macrophytes could potentially aid nitrogen removal in FWS-CWS during winter.

Nitrogen removal along the treatment cells of a free-water surface constructed wetland in subtropical Taiwan

2014 ◽  
Vol 73 ◽  
pp. 579-587 ◽  
Author(s):  
Mei-Li Hsueh ◽  
Lei Yang ◽  
Li-Yung Hsieh ◽  
Hsing-Juh Lin
Keyword(s):  
Nitrogen Removal ◽  
Constructed Wetland ◽  
Water Surface ◽  
Free Water ◽  
Free Water Surface

Batch Operation of Biofilter - Free-water Surface Wetland Series for Enhancing Nitritation and Anammox

2011 ◽  
Vol 83 (6) ◽  
pp. 541-548 ◽  
Author(s):  
Wendong Tao ◽  
Jianfeng Wen ◽  
Matthew Huchzermeier
Keyword(s):  
Water Surface ◽  
Free Water ◽  
Batch Operation ◽  
Free Water Surface ◽  
Surface Wetland
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