Landscape building and ecological development of mangrove wetlands — Case study of the constructed wetland ecological park in Xia-Tan-Wei, Xiamen, China

2016 ◽  
Author(s):  
Changyi Lu ◽  
Xiuli Wang
Keyword(s):  
Constructed Wetland ◽  
Mangrove Wetlands ◽  
Ecological Development

Municipal wastewater treatment with pond–constructed wetland system: a case study

2005 ◽  
Vol 51 (12) ◽  
pp. 325-329 ◽  
Author(s):  
X. Wang ◽  
X. Bai ◽  
J. Qiu ◽  
B. Wang
Keyword(s):  
Constructed Wetland ◽  
Municipal Wastewater ◽  
Municipal Wastewater Treatment ◽  
Oxidation Pond ◽  
System A ◽  
Treated Effluent ◽  
Wetland System ◽  
Oxidation Ponds ◽  
Better Than

The performance of a pond–constructed wetland system in the treatment of municipal wastewater in Kiaochow city was studied; and comparison with oxidation ponds system was conducted. In the post-constructed wetland, the removal of COD, TN and TP is 24%, 58.5% and 24.8% respectively. The treated effluent from the constructed wetland can meet the Chinese National Agricultural and Irrigation Standard. The comparison between pond–constructed wetland system and oxidation pond system shows that total nitrogen removal in a constructed wetland is better than that in an oxidation pond and the TP removal is inferior. A possible reason is the low dissolved oxygen concentration in the wetland. Constructed wetlands can restrain the growth of algae effectively, and can produce obvious ecological and economical benefits.

Small Valley Urban Spatial Form in Hanjiang River Basin

2018 ◽  
Vol 43 (1) ◽  
pp. 11-15
Author(s):  
Yu Xiaohui ◽  
Yang Ruhui ◽  
Liu Bo
Keyword(s):  
River Basin ◽  
Spatial Form ◽  
Narrow Valley ◽  
The Social ◽  
Ecological Development ◽  
Southern Shaanxi ◽  
Hanjiang River ◽  
The City ◽  
Small Valley

Urban spatial form influences the social, economic, and ecological development modes of the city. The spatial form during the urbanization of Hanjiang River Basin in Southern Shaanxi needs to be studied. In this study, research methodologies on urban spatial form in China and abroad were summarized. The concept of ecology background was applied, and the research framework for urban spatial form, which integrated the background, framework, core, axis, cluster, and skin, was established. Valley cities in the Hanjiang River Basin in Southern Shaanxi were classified into wide valley, narrow valley, and canyon cities. The spatial form characteristics of these three types of valley cities were discussed. A case study based on a typical city-Yang County-was conducted to discuss the characteristics of the aforementioned six elements of urban spatial form. Finally, spatial form characteristics were summarized. These characteristics provide a basis for the study of the small valley urban spatial form in the Hanjiang River Basin in Southern Shaanxi.

Performance of constructed wetland applied for domestic wastewater treatment: Case study at Boimorto (Galicia, Spain)

2016 ◽  
Vol 95 ◽  
pp. 324-329 ◽  
Author(s):  
Juan Alfredo Jácome ◽  
Judith Molina ◽  
Joaquín Suárez ◽  
Gonzalo Mosqueira ◽  
Daniel Torres
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetland ◽  
Domestic Wastewater ◽  
Domestic Wastewater Treatment

scholarly journals Constructed Wetlands as Sustainable Technology for the Treatment and Reuse of the First-Flush Stormwater in Agriculture—A Case Study in Sicily (Italy)

Water ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2542 ◽  
Author(s):  
Teresa Tuttolomondo ◽  
Giuseppe Virga ◽  
Mario Licata ◽  
Claudio Leto ◽  
Salvatore La Bella
Keyword(s):  
Constructed Wetland ◽  
Irrigation Water ◽  
Pollutant Removal ◽  
Giant Reed ◽  
Treated Wastewater ◽  
First Flush ◽  
Good Efficiency ◽  
Metal Levels ◽  
Aesthetic Characteristics

This paper describes a case study that was carried out on a Sicilian company (Italy) dealing with separate waste collection and recycling of glass. The aims of this study were to evaluate the overall efficiency of a vertical subsurface flow system (VSSFs) constructed wetland (CW) operating for the treatment of first-flush stormwater and the effects of treated wastewater on the morphological and aesthetic characteristics of ornamental pepper and rosemary plants. The system had a total surface area of 46.80 m2 and was planted with common reed and giant reed. Wastewater samples were taken from October 2018 to July 2019 at the CW inlet and outlet for chemical-physical and microbiological characterization of the wastewater. Two separate experimental fields of rosemary and ornamental pepper were set up in another Sicilian location. Three sources of irrigation water, two accessions of rosemary and two varieties of ornamental pepper were tested in a split-plot design for a two-factor experiment. The results showed very high organic pollutant removal (BOD5 75–83%, COD 65–69%) and a good efficiency of nutrients (TN 60–66%) and trace metals (especially for Cu and Zn) removal. Escherichia coli concentration levels were always lower than 100 CFU 100 mL−1 during the test period. Irrigation water and plant habitus had significant effects on all the morphological and aesthetic characteristics of the plants. For both the crops, plants irrigated with freshwater and treated wastewater had greater growth and showed a better general appearance in comparison with plants irrigated with wastewater. The higher trace metal levels in the wastewater produced adverse effects on plant growth and reduced the visual quality of the plants. Our results suggest the suitability of a VSSFs constructed wetland for the treatment of first-flush stormwater and the reuse of treated wastewater for irrigation purposes, in accordance with legislation requirements concerning wastewater quality.

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