Vertical-flow constructed wetlands treating domestic wastewater contaminated by hydrocarbons

The aim was to compare the impact of different design (aggregate size) and operational (contact time, empty time and chemical oxygen demand (COD) loading) variables on the long-term and seasonal performance of vertical-flow constructed wetland filters operated in tidal flow mode before and after a o...

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Published in:Water science and technology 2015-01, Vol.71 (6), p.938-946
Main Authors: Al-Isawi, R H K, Sani, A, Almuktar, S A A A N, Scholz, M
Format: Article
Language:English
Subjects:
Aggregates
Ammonia
Ammonium Compounds - analysis
Aquatic plants
Artificial wetlands
Biochemical oxygen demand
Chemical oxygen demand
Chemical spills
Contamination
Data analysis
Diesel
Diesel fuels
Domestic wastewater
Efficiency
Filters
Filtration
Fluid filters
Freshwater plants
Gasoline - analysis
Health sciences
Hydraulics
Hydrocarbons
Inflow
Laboratories
Marshes
Methods
Nitrates - analysis
Nitrogen
Organic chemicals
Outflow
Petroleum hydrocarbons
Petroleum Pollution - analysis
Phosphates
Phosphates - analysis
Phosphorus
Phragmites australis
Removal
Seasons
Secondary wastewater
Secondary wastewater treatment
Suspended particulate matter
Suspended solids
Tidal currents
Tidal flow
Total oxygen demand
Waste Disposal, Fluid
Waste Water - analysis
Wastewater
Wastewater pollution
Wastewater treatment
Water Pollutants, Chemical - analysis
Water Quality
Wetlands
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cited_by cdi_FETCH-LOGICAL-c352t-f6eaa41c1e79cfeefdc2b986c65471ea6fab64dc7a841df2eb89dec758d9f6d3
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container_issue 6
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creator Al-Isawi, R H K
Sani, A
Almuktar, S A A A N
Scholz, M
description The aim was to compare the impact of different design (aggregate size) and operational (contact time, empty time and chemical oxygen demand (COD) loading) variables on the long-term and seasonal performance of vertical-flow constructed wetland filters operated in tidal flow mode before and after a one-off spill of diesel. Ten different vertical-flow wetland systems were planted with Phragmites australis (Cav.) Trin. ex Steud. (common reed). Approximately 130 g of diesel fuel was poured into four wetland filters. Before the spill, compliance with secondary wastewater treatment standards was achieved by all wetlands regarding ammonia-nitrogen (NH4-N), nitrate-nitrogen (NO₃-N) and suspended solids (SS), and non-compliance was recorded for biochemical oxygen demand and ortho-phosphate-phosphorus (PO₄-P). Higher COD inflow concentrations had a significantly positive impact on the treatment performance for COD, PO₄-P and SS. The wetland with the largest aggregate size had the lowest mean NO₃-N outflow concentration. However, the results were similar regardless of aggregate size and resting time for most variables. Clear seasonal outflow concentration trends were recorded for COD, NH4-N and NO₃-N. No filter clogging was observed. The removal efficiencies dropped for those filters impacted by the diesel spill. The wetlands system shows a good performance regarding total petroleum hydrocarbon (TPH) removal.
doi_str_mv 10.2166/wst.2015.054
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Ten different vertical-flow wetland systems were planted with Phragmites australis (Cav.) Trin. ex Steud. (common reed). Approximately 130 g of diesel fuel was poured into four wetland filters. Before the spill, compliance with secondary wastewater treatment standards was achieved by all wetlands regarding ammonia-nitrogen (NH4-N), nitrate-nitrogen (NO₃-N) and suspended solids (SS), and non-compliance was recorded for biochemical oxygen demand and ortho-phosphate-phosphorus (PO₄-P). Higher COD inflow concentrations had a significantly positive impact on the treatment performance for COD, PO₄-P and SS. The wetland with the largest aggregate size had the lowest mean NO₃-N outflow concentration. However, the results were similar regardless of aggregate size and resting time for most variables. Clear seasonal outflow concentration trends were recorded for COD, NH4-N and NO₃-N. No filter clogging was observed. The removal efficiencies dropped for those filters impacted by the diesel spill. 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Ten different vertical-flow wetland systems were planted with Phragmites australis (Cav.) Trin. ex Steud. (common reed). Approximately 130 g of diesel fuel was poured into four wetland filters. Before the spill, compliance with secondary wastewater treatment standards was achieved by all wetlands regarding ammonia-nitrogen (NH4-N), nitrate-nitrogen (NO₃-N) and suspended solids (SS), and non-compliance was recorded for biochemical oxygen demand and ortho-phosphate-phosphorus (PO₄-P). Higher COD inflow concentrations had a significantly positive impact on the treatment performance for COD, PO₄-P and SS. The wetland with the largest aggregate size had the lowest mean NO₃-N outflow concentration. However, the results were similar regardless of aggregate size and resting time for most variables. Clear seasonal outflow concentration trends were recorded for COD, NH4-N and NO₃-N. No filter clogging was observed. The removal efficiencies dropped for those filters impacted by the diesel spill. 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identifier ISSN: 0273-1223
ispartof Water science and technology, 2015-01, Vol.71 (6), p.938-946
issn 0273-1223
1996-9732
language eng
recordid cdi_proquest_miscellaneous_1691292933
source Alma/SFX Local Collection
subjects Aggregates
Ammonia
Ammonium Compounds - analysis
Aquatic plants
Artificial wetlands
Biochemical oxygen demand
Chemical oxygen demand
Chemical spills
Contamination
Data analysis
Diesel
Diesel fuels
Domestic wastewater
Efficiency
Filters
Filtration
Fluid filters
Freshwater plants
Gasoline - analysis
Health sciences
Hydraulics
Hydrocarbons
Inflow
Laboratories
Marshes
Methods
Nitrates - analysis
Nitrogen
Organic chemicals
Outflow
Petroleum hydrocarbons
Petroleum Pollution - analysis
Phosphates
Phosphates - analysis
Phosphorus
Phragmites australis
Removal
Seasons
Secondary wastewater
Secondary wastewater treatment
Suspended particulate matter
Suspended solids
Tidal currents
Tidal flow
Total oxygen demand
Waste Disposal, Fluid
Waste Water - analysis
Wastewater
Wastewater pollution
Wastewater treatment
Water Pollutants, Chemical - analysis
Water Quality
Wetlands
title Vertical-flow constructed wetlands treating domestic wastewater contaminated by hydrocarbons
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