Purification Efficiency of Several Constructed Wetland Plants in COD Disposal in Domestic Sewage

2012 ◽  
Vol 518-523 ◽  
pp. 2690-2694
Author(s):  
Min Lu ◽  
Zhen Guo ◽  
Dong He Li
Keyword(s):  
Constructed Wetland ◽  
Sewage Water ◽  
Domestic Sewage ◽  
Wetland Plants ◽  
Species Selection ◽  
Phragmites Communis ◽  
Treatment Technology ◽  
Typha Orientalis ◽  
Canna Generalis ◽  
Selection Of

The research on the species selection of constructed wetland plants and the purification effects of the plants is crucial in ecological wastewater treatment technology. This paper studies the purification effects of different residence time of sewage water, different constructed wetland plants and their synergistic effect on COD disposal in domestic sewage. The results indicate that the best plant combination in purifying COD is that of Phragmites communis, Typha orientalis and Canna generalis, followed by that of Phragmites communis, Arundo donax and Canna generalis. The best plant species in purifying COD is Typha orientalis, followed by Phragmites communis.

Study on the Purification Effects of Constructed Wetland Plants in TP Disposal in Living Wastewater

2011 ◽  
Vol 137 ◽  
pp. 357-361 ◽  
Author(s):  
Min Lu ◽  
Fei Fei Pei ◽  
Xiu Kui Song ◽  
Zhen Guo
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetland ◽  
Arundo Donax ◽  
Wetland Plants ◽  
Species Selection ◽  
Phragmites Communis ◽  
Treatment Technology ◽  
Typha Orientalis ◽  
Canna Generalis ◽  
Selection Of

The study on the species selection of constructed wetland plants and the purification effects of the constructed wetland plants is the key to ecological wastewater treatment technology. The purification effects of different residence time of wastewater, different constructed wetland plants and their synergistic effect are studied in TP disposal in living wastewater. The results show that the best plant combination in purifying TP is that of Arundo donax, Typha orientalis and Canna generalis, followed by that of Phragmites communis, Arundo donax and Canna generalis. The best plant species in purifying TP is Canna generalis, followed by Arundo donax.

Study on the Effects of Wastewater Duress on Chlorophyll Content of 4 Species Wetland Plants

2014 ◽  
Vol 1010-1012 ◽  
pp. 809-812
Author(s):  
Min Lu ◽  
Gong Sheng Liu ◽  
Dong He Li ◽  
Wen Feng Kang ◽  
Jie Zhao ◽  
...  
Keyword(s):  
Chlorophyll Content ◽  
Arundo Donax ◽  
Wetland Plants ◽  
Species Selection ◽  
Phragmites Communis ◽  
Treatment Technology ◽  
Chlorophyll Contents ◽  
Typha Orientalis ◽  
Canna Generalis ◽  
Selection Of

The research which is the species selection of constructed wetland plants and the resistance of the plants is the key to ecological wastewater treatment technology. This paper studies the change of chlorophyll content in 4 wetland plants (Phragmites communis, Typha orientalis, Arundo donax and Canna generalis) in different wastewater duress time. The results show: chlorophyll contents in Canna generalis and Arundo donax have less change, and their anti-stress capability are stronger.

Study on the Effects of Domestic Sewage on Soluble Protein Content of Parts Constructed Wetland Plants

2014 ◽  
Vol 522-524 ◽  
pp. 741-744
Author(s):  
Min Lu ◽  
Jie Zhao ◽  
Lan Dong Feng ◽  
Ke Ke Li ◽  
Xue Ming Zhao ◽  
...  
Keyword(s):  
Protein Content ◽  
Soluble Protein ◽  
Domestic Sewage ◽  
Wetland Plants ◽  
Minimal Change ◽  
Phragmites Communis ◽  
Soluble Protein Content ◽  
Treatment Technology ◽  
Typha Angustata ◽  
Canna Generalis

The study on the resistance of different wetland plants to wastewater duress is the key to ecological wastewater treatment technology. This paper studies the change of soluble protein content in 4 common wetland plants (Phragmites communis, Typha angustata, Arundo donax and Canna generalis) in Shandong in different wastewater duress time. The results show: when the wastewater duress time is 2 days and 4 days, soluble protein content in Phragmites communis has minimal change, and its anti-stress capability is the strongest; when the wastewater duress time is 6 days, soluble protein content in Canna generalis has minimal change, and its anti-stress capability is the strongest, followed by Typha angustata.

Study on the Effects of Wastewater Duress on MDA in Constructed Wetland Plants

2012 ◽  
Vol 610-613 ◽  
pp. 3402-3405
Author(s):  
Min Lu ◽  
Ke Ke Li ◽  
Dong He Li ◽  
Shun Teng Liu ◽  
Fei Wang ◽  
...  
Keyword(s):  
Constructed Wetland ◽  
Material Selection ◽  
Chemical Properties ◽  
Arundo Donax ◽  
Surface Flow ◽  
Wetland Plants ◽  
Wetland Plant ◽  
Phragmites Communis ◽  
Treatment Technology ◽  
Canna Generalis

The study on the wetland plant species and their resistance is the key to ecological wastewater treatment technology. The study on the effects of wastewater duress on the physical and chemical properties of constructed wetland plants and the anti-stress capability of constructed wetland plants can provide theoretical basis and technical support for constructed wetland plant material selection. By adopting surface flow constructed wetland system, the effects are studied on MDA in 4 common plants in Shandong (Phragmites communis, Typha oriental, Arundo donax and Canna generalis) in different wastewater duress time. The results show: All in all, Phragmites communis and Canna generalis have stronger anti-stress capability, while Arundo donax and Typha oriental has weaker anti-stress capability; but as wastewater duress time increases, the anti-stress capability of Phragmites communis decreases, while the anti-stress capability of Canna generalis increases.

Study on the Effects of Wetland Plants on DO in Domestic Sewage

2013 ◽  
Vol 295-298 ◽  
pp. 1303-1306
Author(s):  
Min Lu ◽  
Shun Teng Liu ◽  
Wen Feng Kang ◽  
Ke Ke Li ◽  
Jie Zhao ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Residence Time ◽  
Constructed Wetland ◽  
Domestic Sewage ◽  
Arundo Donax ◽  
Surface Flow ◽  
Wetland Plants ◽  
Phragmites Communis ◽  
Wetland System

By adopting the constructed wetland system of surface flow, the purification effects of different residence time of wastewater, different constructed wetland plants and their synergistic effect are studied in DO disposal in living wastewater. The results show that the best plant combination in purifying DO is that of Phragmites communis and Typha oriental,followed by that of Phragmites communis, and that of Arundo donax and Typha oriental is lowest.

Mechanisms of High Efficiency and Stabilization of Baffled Constructed Wetland in Treatment of Domestic Sewage

2013 ◽  
Vol 295-298 ◽  
pp. 1057-1061 ◽  
Author(s):  
Chang Bing Ye ◽  
Zhi Ming Zhou ◽  
Ke Zhao ◽  
Qin Liu
Keyword(s):  
Constructed Wetland ◽  
Removal Rate ◽  
Short Circuit ◽  
Domestic Sewage ◽  
Wetland Plants ◽  
Stable Operation ◽  
Removal Rates ◽  
Operational Life ◽  
High Efficient ◽  
Hydraulic Load

To solve the problem of short-circuit of individual current constructed wetland, a baffled constructed wetland was designed and applied to treat domestic sewage by our research group. The wetland plants were composed of Eichhormia crassipes, Oenanthe javanica, Cyperusalternifolius, Phragmites communis and Aquatic. The results of 18 month indicated that the optimal hydraulic load of baffled constructed wetland was 2.0~2.2 m3/(m2•d). At the hydraulic load of 2.0m3/(m2•d), the COD, TN and TP removal rates of baffled constructed wetland could be over 76.40%, 76.12%, 65.37%, respectively, at 24°C. When the temperature decreased to 12°C, the COD, TN, TP removal rates of system decreased to 67.56%、62.75% and 61.33%, respectively; The SS removal rate of the first 6 compartments was about 79.5% and that of system could maintain 87.18% during the operation of system. Based on the results of trial, the mechanisms of extending the baffled constructed wetland's operational life was owed to high efficient SS removal rate of the first 6 compartments which was used as constructed wetland and anaerobic baffled reactor (ABR). As a result, the long-term stable operation of system in treatment of domestic sewage was explained with extending about 5 times service life than that of individual current constructed wetland. The mechanisms of higher efficiency of baffled constructed wetland in treatment of domestic sewage were owed to the longer flow line of system and the up-down flow of domestic sewage makes pollutant more intimate contact with roots of wetland plants.

Fern speciation and biogeography

1985 ◽  
Vol 86 ◽  
pp. 353-360 ◽  
Author(s):  
Rolla Tryon
Keyword(s):  
New Species ◽  
Parental Species ◽  
Local Environment ◽  
Limited Range ◽  
Ecological Adaptation ◽  
Species Selection ◽  
Potential Range ◽  
Small Range ◽  
Extensive Range ◽  
Selection Of

SynopsisThe most common kinds of speciation result in new species that initially have a small range. These will develop a limited or an extensive range depending upon the geographic extent of the environment to which they are adapted. A significant element in the extent of the potential range of a new species is the adaptation inherited from the parental species. Selection of a parental species for a local environment at one site can lead to a narrow ecological adaptation and often to a limited potential range. These species are likely to produce derived ones that also have a limited range, and these derivates will increase the regional species endemism and diversity. Selection of a parental species for migration to other sites can lead to a broader ecological adaptation and often to a broad potential range. These species are more likely to produce derived ones that also have an extensive range, and these derivates will increase regional species diversity.

scholarly journals Comparison of Removal Efficiencies in Single and Duplex Ventilation Constructed Wetland Systems for Treating Domestic Sewage

2009 ◽  
Vol 28 (3) ◽  
pp. 258-265 ◽  
Author(s):  
Dong-Cheol Seo ◽  
Seok-Cheon Lim ◽  
In-Seong Jo ◽  
Byeong-Ju Lee ◽  
Hong-Jae Lee ◽  
...  
Keyword(s):  
Constructed Wetland ◽  
Domestic Sewage ◽  
Removal Efficiencies
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