Removal of Nitrogen and Phosphorus in Lightly Polluted Urban Landscape River by Aquatic Ornamental Plant

2012 ◽  
Vol 610-613 ◽  
pp. 1943-1949
Author(s):  
De Qiang Chen ◽  
Xiao Zhong Liu ◽  
Yi Qun Chen ◽  
A Bu Du Aini Maimai Ti ◽  
Hao He
Keyword(s):  
Aquatic Vegetation ◽  
Urban Landscape ◽  
Ornamental Plants ◽  
Lythrum Salicaria ◽  
Ornamental Plant ◽  
Polluted Water ◽  
Typha Angustifolia ◽  
Nitrogen And Phosphorus ◽  
Landscape Water ◽  
Urban Landscape Water

In this study, three species of water ornamental plants, Lythrum salicaria, Typha angustifolia and Iris wilsonii, were introduced to removing nitrogen and phosphorus in lightly polluted urban landscape water. The results showed the experimental plants were all growing well in lightly polluted water and the growth rates were: Lythrum salicaria 33%, Iris wilsonii 19% and Typha angustifolia16%, respectively. The removal efficiency of TN of Lythrum licaria, Typha angustifolia and Iris wilsoni were 55.42%, 62.65% and 57.59%, respectively. The removal rates of TP of three species of hydrophytes were Lythrum licaria 63.9%, Typha angustifolia 51.7% and Iris wilsoni 38.9%, respectively. Based on the removal efficiencies on nitrogen and phosphorus and landscape efficiency, the three species of water ornamental plants were recommended as pioneer in aquatic vegetation restoration in urban lightly polluted landscape river.

Employing of Aquatic Plants for Urban Landscape Water Purification in Kaifeng

2012 ◽  
Vol 178-181 ◽  
pp. 367-370
Author(s):  
Li Min Zhao ◽  
Hai Tao Wan
Keyword(s):  
Aquatic Plants ◽  
Phosphorus Removal ◽  
Aquatic Vegetation ◽  
Urban Landscape ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
Landscape Plants ◽  
As Species ◽  
Landscape Water ◽  
Urban Landscape Water

The bioremediation technology for urban landscape waters are illustrated in this paper. The characteristics and purification performance of urban landscape waters were introduced. Based on their good effects on nitrogen and phosphorus removal, the landscape plants are recommended as species of aquatic vegetation in phytoremediation of wastewater of urban river.

Algae separation from urban landscape water using a high density microbubble layer enhanced by micro-flocculation

2014 ◽  
Vol 70 (5) ◽  
pp. 811-818 ◽  
Author(s):  
Shuwen Chen ◽  
Jingcheng Xu ◽  
Jia Liu ◽  
Qiaoling Wei ◽  
Guangming Li ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Urban Landscape ◽  
Oxygen Demand ◽  
High Density ◽  
Raw Water ◽  
Nitrogen And Phosphorus ◽  
Layer Height ◽  
Hydraulic Loading ◽  
Landscape Water ◽  
Urban Landscape Water

Eutrophication of raw water results in outbreaks of algae, which hinders conventional water treatment. In this study, high density microbubble layers combined with micro-flocculation was adopted to remove algae from urban landscape water, and the effects of pressure, hydraulic loading, microbubble layer height and flocculation dosage on the removal efficiency for algae were studied. The greatest removal efficiency for algae, chemical oxygen demand, nitrogen and phosphorus was obtained at 0.42 MPa with hydraulic loading at 5 m/h and a flocculation dosage of 4 mg/L using a microbubble layer with a height of 130 cm. Moreover, the size, clearance distance and concentration of microbubbles were found to be affected by pressure and the height of the microbubble layer. Based on the study, this method was an alternative for algae separation from urban landscape water and water purification.

Organic Contaminant Types of Urban Landscape Water and Countermeasures: A Case Study of the Xuchang Moat

2013 ◽  
Vol 361-363 ◽  
pp. 686-690
Author(s):  
Zhong Xuan Li ◽  
Wen Lü
Keyword(s):  
Complex Traits ◽  
Urban Landscape ◽  
Pollution Index ◽  
Cooking Oil ◽  
North East ◽  
Landscape Water ◽  
Main Components ◽  
Fluorescence Spectrometer ◽  
Urban Landscape Water

By monitoring the water quality (Dec., 2009-2011) of the three sections of the moat in Xuchang, the data show that three-year average turbidity of the water at North, East, South sections is 18.6,16.7 and 12.4 respectively, and with average COD at 43 mg / L, 37.5 mg / L and 29.5 mg / L in accordance, as well as with BOD5 content at 16.1mg / L, 15.0mg / L and 8.7 mg / L. The integrated pollution index of the three mentioned sections was 2.54,1.94 and 1.06 in December 2011, increasing by 29.6%, 22% and 34.2% in comparison with the same period in 2009. The fluorescence spectrometer tests display that the main components of organic pollutants at the northern and eastern sections are organic detergent, cooking oil and a variety of plant and animal protein in complex traits.

Effect of a strengthened ecological floating bed on the purification of urban landscape water supplied with reclaimed water

2018 ◽  
Vol 622-623 ◽  
pp. 1630-1639 ◽  
Author(s):  
Wen-Huai Wang ◽  
Yi Wang ◽  
Zhi Li ◽  
Cun-Zhi Wei ◽  
Jing-Chan Zhao ◽  
...  
Keyword(s):  
Urban Landscape ◽  
Reclaimed Water ◽  
Landscape Water ◽  
Urban Landscape Water
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