A study on the effects of different hydraulic loading rates (HLR) on pollutant removal efficiency of subsurface horizontal-flow constructed wetlands used for treatment of domestic wastewaters

2015 ◽  
Vol 164 ◽  
pp. 121-128 ◽  
Author(s):  
Recep Çakir ◽  
Ali Gidirislioglu ◽  
Ulviye Çebi
Keyword(s):  
Removal Efficiency ◽  
Constructed Wetlands ◽  
Pollutant Removal ◽  
Horizontal Flow ◽  
Loading Rates ◽  
Hydraulic Loading ◽  
Pollutant Removal Efficiency

Influence of Pollutant Removal Efficiency on Natural Ventilation in GPPLF System

2013 ◽  
Vol 448-453 ◽  
pp. 468-471
Author(s):  
Xiao Bo Zhou ◽  
Cheng Duan Wang ◽  
Zhi Shuai Wang ◽  
Li Li Zhang ◽  
Xia Li
Keyword(s):  
Removal Efficiency ◽  
Treatment Effect ◽  
Natural Ventilation ◽  
Domestic Sewage ◽  
T Test ◽  
Pollutant Removal ◽  
Removal Rates ◽  
Hydraulic Loading ◽  
Perforated Pipe ◽  
Pollutant Removal Efficiency

Two Gravel-less Perforated Pipe Leach Fields systems with naturally ventilated or not were tested to treat domestic sewage under the hydraulic loading of 3.3 cm/d, and the differences of the two systems decontamination effect were also investigated by using T test. The results showed that the average removal rates of CODCr, TP, TN and turbidity were 86.1%, 58.0%, 61.1% and 93.6% in the naturally ventilated system, which was 2.0%, 5.4%, 10.2% and 3.2% higher than the normal GPPLF system under the same operating condition. T test indicated that the system of natural ventilation had little effect on removal of CODCr and TP, but could significantly improve the treatment effect of TN and turbidity.

scholarly journals Analysis of potential of Napier grass, Vetiver and Equisetum plants for the treatment of domestic greywater using box-type constructed wetlands

2021 ◽  
Author(s):  
Sijimol MR ◽  
Mansa ML ◽  
Sabu Joseph
Keyword(s):  
Removal Efficiency ◽  
Constructed Wetlands ◽  
Human Activities ◽  
Pollutant Removal ◽  
Napier Grass ◽  
Pennisetum Purpureum ◽  
Vetiveria Zizanioides ◽  
Equisetum Hyemale ◽  
Global Concern ◽  
Pollutant Removal Efficiency

Abstract The management of wastewater generated as a byproduct of various human activities from agricultural, industrial, and domestic sectors is a matter of global concern today. Greywater is a class of wastewater generated from the domestic sector. Greywater management can be done effectively by treating greywater at the source itself. In this context, constructed wetlands (CWs) come handy with low-tech, environmental, and economic-friendly options. In the present study, box-type horizontal subsurface flow constructed wetlands were designed and the efficiency of Napier grass (Pennisetum purpureum), Vetiver (Vetiveria zizanioides), and Equisetum (Equisetum hyemale) were assessed in treating domestic greywater. There was a drastic significant increase in DO with 47.0% in Vetiver, 92.5% in Napier grass, and 97.2% in Equisetum. The average percent pollutant removal of some major parameters was 92.4% for turbidity, 92.7% for acidity, 81.3% for BOD, 91.0% for COD with Napier grass. In the case of Vetiver, the removal percent was 82.5% turbidity, 87.9% acidity, 81.8% BOD, and 92.9% COD. For Equisetum, the average pollutant removal efficiency varied with 94.6% turbidity, 91.4% acidity, 80.0% BOD, and 88.1%COD. The study thus proves the efficiency of all the three plants to be used in box-type constructed wetlands.

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