Effects of plant diversity and sand particle size on methane emission and nitrogen removal in microcosms of constructed wetlands

2016 ◽  
Vol 95 ◽  
pp. 390-398 ◽  
Author(s):  
Zhengyan Zhao ◽  
Jie Chang ◽  
Wenjuan Han ◽  
Meng Wang ◽  
Danping Ma ◽  
...  
Keyword(s):  
Particle Size ◽  
Constructed Wetlands ◽  
Plant Diversity ◽  
Nitrogen Removal ◽  
Methane Emission ◽  
Sand Particle

Positive effects of plant diversity on nitrogen removal in microcosms of constructed wetlands with high ammonium loading

2015 ◽  
Vol 82 ◽  
pp. 614-623 ◽  
Author(s):  
Ying Ge ◽  
Wenjuan Han ◽  
Chengcai Huang ◽  
Hai Wang ◽  
Dong Liu ◽  
...  
Keyword(s):  
Constructed Wetlands ◽  
Plant Diversity ◽  
Nitrogen Removal ◽  
Positive Effects

Enhancement of nitrogen removal in subsurface flow constructed wetlands employing a 2-stage configuration, an unsaturated zone, and recirculation

1995 ◽  
Vol 32 (3) ◽  
pp. 59-67 ◽  
Author(s):  
Kevin D. White
Keyword(s):  
Constructed Wetlands ◽  
Nitrogen Removal ◽  
Constructed Wetland ◽  
Subsurface Flow ◽  
Great Promise ◽  
Effluent Recirculation ◽  
Wetland Treatment ◽  
Subsurface Flow Constructed Wetlands ◽  
Inlet Zone ◽  
Bod Removal

Constructed wetland technology is currently evolving into an acceptable, economically competitive alternative for many wastewater treatment applications. Although showing great promise for removing carbonaceous materials from wastewater, wetland systems have not been as successful at nitrification. This is primarily due to oxygen limitations. Nitrification does occur in conventional wetland treatment systems, but typically requires long hydraulic retention times. This paper describes a study that first evaluated the capability of subsurface flow constructed wetlands to treat a high strength seafood processor wastewater and then evaluated passive aeration configurations and effluent recirculation with respect to nitrogen treatment efficiency. The first stage of a 2-stage wetland treatment system exhibited a relatively short hydraulic retention time and was designed for BOD removal only. The second stage wetland employed an unsaturated inlet zone and effluent recirculation to enhance nitrification. Results indicate that organic loading, and thus BOD removal, in the first stage wetland is key to optimal nitrification. Passive aeration through an unsaturated inlet zone and recirculation achieved up to 65-70 per cent ammonia nitrogen removal at hydraulic retention times of about 3.5 days. Inlet zone configuration and effluent recirculation is shown to enhance the nitrogen removal capability of constructed wetland treatment systems.

scholarly journals Plant diversity increases N removal in constructed wetlands when multiple rather than single N processes are considered

2019 ◽  
Vol 29 (7) ◽  
Author(s):  
Yan Geng ◽  
Ying Ge ◽  
Bin Luo ◽  
Zhengxin Chen ◽  
Yong Min ◽  
...  
Keyword(s):  
Constructed Wetlands ◽  
Plant Diversity ◽  
N Removal
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