Evaluation of an intermittent-aeration constructed wetland for removing residual organics and nutrients from secondary effluent: Performance and microbial analysis

2021 ◽  
Vol 329 ◽  
pp. 124897
Author(s):  
Jia Li ◽  
Lei Zheng ◽  
Changbing Ye ◽  
Baosen Ni ◽  
Xingzhu Wang ◽  
...  
Keyword(s):  
Constructed Wetland ◽  
Secondary Effluent ◽  
Intermittent Aeration ◽  
Microbial Analysis

Biochar Based Constructed Wetland for Secondary Effluent Treatment: Waste Resource Utilization

2021 ◽  
pp. 134377
Author(s):  
Feifei Zheng ◽  
Junhua Fang ◽  
Fucheng Guo ◽  
Yang Xiangyu ◽  
Tao Liu ◽  
...  
Keyword(s):  
Resource Utilization ◽  
Constructed Wetland ◽  
Effluent Treatment ◽  
Secondary Effluent

scholarly journals Effect of hydraulic retention time on chemical oxygen demand and total nitrogen removal in intermittently aerated constructed wetlands

2020 ◽  
Vol 15 (3) ◽  
pp. 1 ◽  
Author(s):  
Isabela Pires da Silva ◽  
Gabriela Barbosa da Costa ◽  
João Gabriel Thomaz Queluz ◽  
Marcelo Loureiro Garcia
Keyword(s):  
Chemical Oxygen Demand ◽  
Constructed Wetlands ◽  
Total Nitrogen ◽  
Total Phosphorus ◽  
Constructed Wetland ◽  
Retention Time ◽  
Hydraulic Retention Time ◽  
Subsurface Flow ◽  
Oxygen Demand ◽  
Intermittent Aeration

   This study evaluated the effect of hydraulic retention time on chemical oxygen demand (COD) and total nitrogen (TN) removal in an intermittently aerated constructed wetlands. Two horizontal subsurface-flow constructed wetlands were used: one without aeration and the other aerated intermittently (1 hour with aeration/7 hours without aeration). Both systems were evaluated treating domestic wastewater produced synthetically. The flow rate into the two CWs was 8.6 L day-1 having a hydraulic retention time of 3 days. The results show that the intermittently aerated constructed wetland were highly efficient in removing COD (98.25%), TN (83.60%) and total phosphorus (78.10%), while the non-aerated constructed wetland showed lower efficiencies in the removal of COD (93.89%), TN (48.60%) and total phosphorus (58.66). These results indicate, therefore, that intermittent aeration allows the simultaneous occurrence of nitrification and denitrification processes, improving the removal of TN in horizontal subsurface-flow constructed wetlands. In addition, the use of intermittent aeration also improves the performance of constructed wetlands in removing COD and total phosphorus.

scholarly journals Intermittent aeration to improve wastewater treatment efficiency in pilot-scale constructed wetland

2016 ◽  
Vol 559 ◽  
pp. 212-217 ◽  
Author(s):  
Enrica Uggetti ◽  
Theodore Hughes-Riley ◽  
Robert H. Morris ◽  
Michael I. Newton ◽  
Christophe L. Trabi ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetland ◽  
Pilot Scale ◽  
Intermittent Aeration ◽  
Treatment Efficiency

scholarly journals High Rate Nitrogen Removal in an Alum Sludge-Based Intermittent Aeration Constructed Wetland

2012 ◽  
Vol 46 (8) ◽  
pp. 4583-4590 ◽  
Author(s):  
Yuansheng Hu ◽  
Yaqian Zhao ◽  
Xiaohong Zhao ◽  
Jeyakumar L. G. Kumar
Keyword(s):  
Nitrogen Removal ◽  
Constructed Wetland ◽  
High Rate ◽  
Intermittent Aeration ◽  
Alum Sludge
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