Kinetics of pollutants removal in vertical and horizontal flow constructed wetlands in temperate climate

Gajewska, Magdalena; Skrzypiec, Katarzyna; Jóźwiakowski, Krzysztof; Mucha, Zbigniew; Wójcik, W.; Karczmarczyk, Agnieszka; Bugajski, Piotr

doi:10.1016/j.scitotenv.2020.137371

Cited by 51 publications

(31 citation statements)

References 22 publications

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“…Here, q = hydraulic loading rate in m d -1 i.e. calculated as the ratio of flow rate (Q) in m 3 d -1 and surface area (A) in m 2 whereas k A is the decomposition constant in m d -1 [21].…”

Section: Experimental Design and Collection Of Samplesmentioning

confidence: 99%

Effect of filter media and hydraulic retention time on the performance of vertical constructed wetland system treating dairy farm wastewater

Minakshi

Sharma

Rani

2021

Environmental Engineering Research

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This study deals with the dairy wastewater treatment using laboratory scale vertical flow (VF) constructed wetlands with the <i>Canna indica</i> plantation over wetland beds due to phytoremediation capabilities. Three laboratory scale VF CWs (CW-A, CW-B and CW-C) each with an area of 0.135 m2 filled with gravel (CW-A: 20 mm; CW-B:10 mm gravel) and sand (CW-C) receiving 0.04 m3 d-1 dairy wastewater were operated for the wastewater purification. Each unit was operated at three hydraulic retention times (HRTs) i.e. 12 h, 24 h and 48 h for assessing its effect on wastewater purification . Among all units, removal rates fluctuated as: total suspended solids (TSS): 64.2–74.5%; biochemical oxygen demand (BOD): 45.3 – 63.1%; ammonium nitrogen (NH4–N): 29.6 – 56.5% and phosphate phosphorous (PO4–P): 20.5 – 57.8% at different HRTs. Increase in HRT showed better removal of pollutants in all CWs. Moreover, maximum removal of pollutants excluding TSS and NH4-N was achieved in CW-B at 48 h HRT. CW-B with similar HRT provided maximum removal of PO4-P (57.8%), BOD (63.1%) and chemical oxygen demand (COD): 67.4%. Increase in the size of filter media, from sand (0.25 mm) to 20 mm gravel resulted in higher removal of NH4 -N from wastewater.

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“…Here, q = hydraulic loading rate in m d -1 i.e. calculated as the ratio of flow rate (Q) in m 3 d -1 and surface area (A) in m 2 whereas k A is the decomposition constant in m d -1 [21].…”

Section: Experimental Design and Collection Of Samplesmentioning

confidence: 99%

Effect of filter media and hydraulic retention time on the performance of vertical constructed wetland system treating dairy farm wastewater

Minakshi

Sharma

Rani

2021

Environmental Engineering Research

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“…The design of constructed wetlands is generally based on the parameters of BOD [24]. As shown in Fig.…”

Section: F All Measured Parametersmentioning

confidence: 99%

“…All design equations for pollutant removal and treatment performance in constructed wetlands are generally based on the parameters of BOD [24]. Therefore, this study as an initial stage of designing household CW emphasized the BOD removal to be examined to select the most appropriate aquatic plant for the household wetland.…”

Section: Introductionmentioning

confidence: 99%

Initial Stage in Designing Household Constructed Wetlands: Selection of a Suitable Aquatic Plant

Qomariyah¹,

Ramelan²,

Setyono³

et al. 2021

Int. J. Adv. Sci. Eng. Inf. Technol.

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Constructing centralized wastewater treatment plant systems to serve and control city sanitation requirements is vastly expensive in developing countries. Consequently, employing decentralized wastewater treatment systems through utilizing constructed wetlands (CWs) for individual households should be promoted. In this study, the most appropriate aquatic species planted in constructed wetlands were examined for treating greywater at the household level in humid tropical regions. Three different decorative aquatic plants (i.e., Echinodorus palaefolius, Typha latifolia, and Cyperus alternifolius) were compared based on their performances. Also, three similar wetlands having a total working volume of 158.42 liters with a gravel sand filter were used in this study. One day, a period was allocated for the hydraulic retention time (HRT), which corresponds to the applied hydraulic loading rate of 115.5-and 150.5-mm d -1 for the first and second experiments, respectively. The high percentage removal of 5-day biological oxygen demand (BOD5), along with an aesthetic green view and minimum maintenance of decorative plants, was employed as the selection criteria. Insitu measurements were also undertaken for pH, temperature, and total dissolved solids. The findings indicate that the most significant BOD5 removal was with the Cyperus alternifolius plants, which showed a very high BOD5 removal rate (91.18%). The Cyperus alternifolus species were more resistant in full direct sunlight conditions and adaptable to grow in temporarily or fully submerged conditions. These results, therefore, suggest that Cyperus alternifolius is the most suitable plant species for the treatment of greywater in household CWs in the tropics.

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“…Monitoring data obtained in this study site showed the similar inflow concentrations to domestic wastewater comparing the BOD5, COD and nutrients. Decreasing of BOD and COD concentrations [1], [5]- [9] in municipal wastewater using constructed wetlands is widely studied over the countries. The treatment method in subsurface flow constructed wetland for storm water from agricultural areas in this article was studied.…”

Section: Introductionmentioning

confidence: 99%

Treatment of Storm Water from Agricultural Catchment in Pilot Scale Constructed Wetland

Grinberga

Lauva

Lagzdiņš

2021

Environmental and Climate Technologies

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Constructed wetlands as a treatment system are widely explored in different climate conditions and established to be effective in pollution removal from water environment. This study aims to demonstrate the performance of pilot-scale subsurface flow constructed wetland for storm water treatment in Latvia. The catchment basin was located in a farmyard of agricultural area and storm water was collected from the impermeable pavements. Storm water was accumulated in an open pond and periodically pumped above the filter part of the subsurface flow constructed wetland. Grab samples were collected once or twice per month at the inlet and outlet of the treatment system during a period of 73 months from year 2014 to 2020. Water quality parameters as nitrate nitrogen (NO3-N), ammonium nitrogen (NH4–N), total nitrogen (TN), orthophosphate phosphorus (PO4-P), and total phosphorus (TP), total suspended solids (TSS), biochemical oxygen demand (BOD5) and chemical oxygen demand (COD) were monitored. Water level at the inlet structure was automatically measured and flow rate was calculated based on the Manning equation for partially filled circular pipes. Results showed the reduction of average concentrations for all parameters during the study period. However, in some sampling cases concentrations increased at the outlet of the treatment system and can be explained by influencing factors of farming and maintenance. The treatment efficiency of NO3-N, NH4-N, TN, PO4-P, TP, TSS, BOD5 and COD concentrations was 17 %, 68 %, 55 %, 78 %, 80 %, 57 %, 80 % and 74 %, respectively. The study site demonstrated a potential to improve water quality in the long term.

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Kinetics of pollutants removal in vertical and horizontal flow constructed wetlands in temperate climate

Cited by 51 publications

References 22 publications

Effect of filter media and hydraulic retention time on the performance of vertical constructed wetland system treating dairy farm wastewater

Effect of filter media and hydraulic retention time on the performance of vertical constructed wetland system treating dairy farm wastewater

Initial Stage in Designing Household Constructed Wetlands: Selection of a Suitable Aquatic Plant

Treatment of Storm Water from Agricultural Catchment in Pilot Scale Constructed Wetland

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