The efficiency and technological reliability of biogenic compounds removal during long-term operation of a one-stage subsurface horizontal flow constructed wetland

•The technological reliability and efficiency of pollution removal in one-stage constructed wetland (CW) was analyzed.•Total nitrogen and total phosphorus removal efficiency amounted 51% and 73%, respectively.•Technological reliability of total N and P removal was 45% and 48%, respectively.•One-stag...

Full description

Saved in:

Bibliographic Details
Published in:	Separation and purification technology Vol. 202; pp. 216 - 226
Main Authors:	Jóźwiakowski, Krzysztof, Bugajski, Piotr, Kurek, Karolina, de Fátima Nunes de Carvalho, Maria, Almeida, Maria Adelaide Araújo, Siwiec, Tadeusz, Borowski, Gabriel, Czekała, Wojciech, Dach, Jacek, Gajewska, Magdalena
Format:	Journal Article
Language:	English
Published:	Elsevier B.V 31-08-2018
Subjects:	Biogenic compounds Constructed wetland Horizontal flow Long-term operation Technological reliability Wastewater treatment Biogenic compounds Technological reliability Horizontal flow Wastewater treatment Constructed wetland Long-term operation
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	•The technological reliability and efficiency of pollution removal in one-stage constructed wetland (CW) was analyzed.•Total nitrogen and total phosphorus removal efficiency amounted 51% and 73%, respectively.•Technological reliability of total N and P removal was 45% and 48%, respectively.•One-stage CWs does not ensure biogenic compounds effective removal in long-term operation. The paper presents the results of a study of the efficiency and technological reliability of total nitrogen and total phosphorus removal during long term operation of a one-stage constructed wetland system with subsurface horizontal wastewater flow. The flow rate of the wastewater treatment plant was 1.2 m3/d during the research period. Physical and chemical analyses of raw wastewater and treated effluent were carried out in the years 1997–2010 (14 years). During this study period, 56 series of analyses were performed and 112 wastewater samples were collected. It was observed that the average efficiency of total nitrogen and total phosphorus removal amounted to 51% and 73%, respectively. The technological reliability, determined by means of the Weibull reliability method, was 45% for total nitrogen removal and 48% in the case of total phosphorus removal. Total nitrogen and total phosphorus concentrations in the treated wastewater did not exceed the permissible values in 39.3% and 37.5% of cases, respectively. A negative correlation was found between the sorption capacity of the soil-plant filter for the removal of total phosphorus and the time of plant operation. The efficiency of total nitrogen removal was stable over time.
ISSN:	1383-5866 1873-3794
DOI:	10.1016/j.seppur.2018.03.058