A sample study on nitrogen removal from polluted streams by using hybrid natural wastewater treatment systems
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Date
2018
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Global NEST
Access Rights
info:eu-repo/semantics/openAccess
Abstract
The ecological structure and function of the water reservoirs deteriorate dramatically because of streams fed by the excess nitrogen-containing wastewater. To protect the water reservoirs from polluted streams, structures such as natural wastewater treatment (NWT) systems to be created inside or outside streams may be a most suitable and economical solution method to overcoming the problem. In this study, a hybrid NWT system was installed to remove nitrogenous pollutants in Karasu creek (Nigde city, Turkey) in 2014. The system built near the creek consisted of feeding basin (FB), settlement basin (SB), free water surface-constructed wetland (FWS-CW), and overland flow (OF) system respectively. Despite quite high nitrogen loading rates, the system managed to reduce NH4 +-N from average 29 mg/L to 12 mg/L and TN from 44 mg/L to 19 mg/L with an average removal efficiency of 57%. Results revealed that hydraulic and nitrogen loading rate, temperature and seasonal variation, BOD/TKN ratio, hydraulic residence time (HRT), and the use of the filter material were effective on nitrogen removal. The results suggest that the hybrid NWT systems can be used as a low-cost wastewater treatment alternative to improve water quality in streams contaminated by nitrogenous pollutants in the similar areas. © 2018 Global NEST Printed in Greece. All rights reserved.
Description
Keywords
Constructed wetland, Overland flow, Stream water purification, Wetland hydrology
Journal or Series
Global Nest Journal
WoS Q Value
Q4
Scopus Q Value
Q3
Volume
20
Issue
3
