Behaviour of 27 Selected Emerging Contaminants in Vertical Flow Constructed Wetlands as Post-Treatment for Municipal Wastewater

In this study, two-phase continuous vertical flow constructed wetlands were installed with a pre-cleaner bioelectrochemical system for the removal of NH4+-N (60.41–85.78%), NO3−-N (25.55–35.18%), TN (57.80–84.65%), TKN (37.24–70.08%), PO43−-P (38.89–63.40%), SO42− (49.53–76.06%), and COD (25.83–74.70%) from municipal wastewater.

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Effectiveness of septage pre-treatment in vertical flow constructed wetlands

Water Science & Technology ◽

10.2166/wst.2017.398 ◽

2017 ◽

Vol 76 (9) ◽

pp. 2544-2553 ◽

Cited By ~ 5

Author(s):

Beata Karolinczak ◽

Wojciech Dąbrowski

Keyword(s):

Constructed Wetlands ◽

Municipal Wastewater ◽

Oxygen Demand ◽

Vegetation Period ◽

Ammonia Nitrogen ◽

Vertical Flow ◽

Municipal Wastewater Treatment ◽

Vertical Flow Constructed Wetlands ◽

Hydraulic Load ◽

Pre Treatment

Abstract Septage is wastewater stored temporarily in cesspools. A periodic supply of its significant quantities to small municipal wastewater treatment plants (WWTPs) may cause many operational problems. In the frame of the research, it has been proposed to utilize vertical flow constructed wetlands for pre-treatment of septage prior to its input to the biological stage of a WWTP. The aim of the work was to assess the effectiveness of pre-treatment in relation to factors such as: seasonality, hydraulic load, pollutants load of the VF bed and interactions between these factors. The results proved that application of a VF bed to septage pre-treatment can significantly reduce the concentration of pollutants (biochemical oxygen demand (BOD5): 82%, chemical oxygen demand (COD): 82%, total suspended solids (TSS): 91%, total nitrogen (TN): 47%, ammonia nitrogen (NH4-N): 70%), and thus decrease the loading of the biological stage of a WWTP. The mathematical models of mass removal process were created. They indicate that in case of all analysed parameters, removed load goes up with the increase of load in the influent. However, with the increase of hydraulic load, a decrease of the removed BOD5, COD, TSS and total phosphorus, and in vegetation period an increase of TN, can be observed in terms of load. There are no statistically significant effects of seasonality.

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Performance Assessment of the Vertical Flow Constructed Wetlands Treating Effluent from the UASB Reactor – A Demonstration in a Tropical Climatic Region

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.d2378.118419 ◽

2019 ◽

Vol 8 (4) ◽

pp. 9779-9781

Keyword(s):

Constructed Wetlands ◽

Municipal Wastewater ◽

Cost Effective ◽

Uasb Reactor ◽

Anaerobic Sludge ◽

Vertical Flow ◽

Climatic Regions ◽

Vertical Flow Constructed Wetlands ◽

Anaerobic Sludge Blanket ◽

Treating Effluent

This paper presents the performance of the vertical flow constructed wetlands (VF-CWs) that has been investigated at a demonstration-scale level for the treatment of effluent from the anaerobic digestor (up-flow anaerobic sludge blanket) for municipal wastewater. The area of the bed is 480m2 with a depth of 1.0m, having dual media. The macrophytes (vegetation) used in the VF-CWs is phragmites australis. The performance efficiency of the system was measured for different parameters like BOD, COD, TSS, TKN, and TC. The result indicates that the combination of UASB & VF-CWs offers a very promising way to deal with the municipal wastewater within cost-effective and sustainable approaches, particularly in the developing countries in a tropical climatic regions. The overall removal efficiency from UASB and VFCW for COD, BOD, TSS, TKN is 80.8%, 91%, 88.23% and 92.25% respectively. The total coliforms removal has been observed from 1E+06 to 1E+04 CFU/100ml

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