Effects of Hydraulic Loading Rate on Nutrient Removal in Multi-Stage Constructed Wetland

2013 ◽  
Vol 864-867 ◽  
pp. 1498-1502
Author(s):  
Qing Feng Chen ◽  
Wen Guo Dong ◽  
Jun Jian Ma ◽  
Qing Li ◽  
Xin Guo Gao ◽  
...  
Keyword(s):  
Constructed Wetland ◽  
Loading Rate ◽  
Optimal Parameter ◽  
Removal Rate ◽  
Operational Parameter ◽  
Hydraulic Loading Rate ◽  
Hydraulic Loading ◽  
Multi Stage ◽  
Operation Period ◽  
D 12

Hydraulic loading rate (HLR) is an important operational parameter for constructed wetland to purify wastewater. In this paper, it is the main objective to select the optimal parameter of HLR. During the four HLRs (i.e., 6 cm/d, 12 cm/d, 24 cm/d and 48 cm/d) operation period, six days were used as one stage. The experimental results showed that the best average removal rates of CODcr (59.7%) and NH3-N (89.4%) were at the HLR of 6 cm/d. In the meantime, the best average removal rate of total phosphorus (TP, 50.0%) was at the HLR of 24 cm/d. According to the low influent TP concentration, it is suggested that the HLR of 6 cm/d should be used in the multi-stage constructed wetland.

Landfill Leachate Treatment Using SSF-FWS Constructed Wetland Planted with Limnocharis flava and Eihhornia crassipes under Different Hydraulic Loading Rate

2013 ◽  
Vol 594-595 ◽  
pp. 344-349 ◽  
Author(s):  
Ain Nihla Kamarudzaman ◽  
Alice Dandun Anak Gana ◽  
Mohd Faizal Ab Jalil ◽  
Roslaili Abdul Aziz
Keyword(s):  
Constructed Wetland ◽  
Landfill Leachate ◽  
Loading Rate ◽  
Ph Value ◽  
Pollutant Removal ◽  
Leachate Treatment ◽  
Hydraulic Loading Rate ◽  
Hydraulic Loading ◽  
The Difference ◽  
And Control

A laboratory-scale study was conducted using a combination of SSF and FWS constructed wetland planted with Limnocharis flava and Eichhornia crassipes to treat landfill leachate. The effects of hydraulic loading rate (HLR) on pollutant removal in landfill leachate as well as the difference in performance between the planted and control system were investigated. The HLR in the system was varied at 0.39 m/d and 0.55 m/d. The results showed that the SSF-FWS constructed wetland was successful in reducing the pH value, TSS and turbidity. The removal efficiency of TSS and turbidity were achieved 98.32% and 97.43%, respectively at 0.39 m/d HLR. The study concluded that different HLR and the presence of wetland plants have given significant effects on the constructed wetland performance.

The Parameters Control of Recirculation Treatment for Leachate

2014 ◽  
Vol 1015 ◽  
pp. 340-345
Author(s):  
Bao Jun Jiang ◽  
Zhu Jun Tian ◽  
Jin Ming Jiang
Keyword(s):  
Loading Rate ◽  
Removal Rate ◽  
Important Influence ◽  
Organic Loading Rate ◽  
Major Influence ◽  
Organic Loading ◽  
Hydraulic Loading Rate ◽  
Hydraulic Loading ◽  
N Removal ◽  
Influence Parameter

The three parameters, hydraulic loading rate, organic loading rate and recirculation times have important influence on the efficiency of recirculation treatment, the recirculation experiment research removal of COD under different hydraulic loading rate, organic loading rate and recirculation times by the experimental devices built in landfill in a civil city. The result indicated that the hydraulic loading rate is the major influence parameter for leachate recirculation. When hydraulic loading rate was 30ml/L·d~200ml/L·d, COD removal efficiency was 70%~94%; However, organic loading rate has comparative minor influence on recirculation treatment; the apt recirculation times are 3 or 4 in a day; C/N of recirculation leachate have important influence on NH3-N removal rate, but the effect of hydraulic loading rate and recirculation times on NH3-N removal rate aren’t obvious.

Influence of hydraulic loading rate and recirculation on oxygen transfer in a vertical flow constructed wetland

2019 ◽  
Vol 668 ◽  
pp. 988-995 ◽  
Author(s):  
Samara T. Decezaro ◽  
Delmira B. Wolff ◽  
Catiane Pelissari ◽  
Rolando J.M.G. Ramírez ◽  
Thiago A. Formentini ◽  
...  
Keyword(s):  
Constructed Wetland ◽  
Oxygen Transfer ◽  
Loading Rate ◽  
Vertical Flow ◽  
Hydraulic Loading Rate ◽  
Hydraulic Loading ◽  
Vertical Flow Constructed Wetland
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