Application of subsurface vertical flow constructed wetlands to reject water treatment in dairy wastewater treatment plant

Wojciech Dąbrowski , Beata Karolinczak , Magdalena Gajewska , Ewa Wojciechowska


The paper presents the effects of applying subsurface vertical flow constructed wetlands (SS VF) for the treatment of reject water generated in the process of aerobic sewage sludge stabilization in the biggest dairy wastewater treatment plant (WWTP) in Poland. Two SS VF beds were built: bed (A) with 0.65 m depth and bed (B) with 1.0 m depth, planted with reeds. Beds were fed with reject water with hydraulic load of 0.1 m d−1 in order to establish the differences in treatment efficiency. During an eight-months research period, a high removal efficiency of predominant pollutants was shown: BOD5 88.1% (A) and 90.5% (B); COD 84.5% (A) and 87.5% (B); TSS 87.6% (A) and 91.9% (B); TKN 82.4% (A) and 76.5% (B); N-NH4+ 89.2% (A) and 85.7% (B); TP 30.2% (A) and 40.6% (B). There were not statistically significant differences in the removal efficiencies between bed (B) with 1.0 m depth and bed (A) with 0.65 m depth. The research indicated that SS VF beds could be successfully applied to reject water treatment in dairy WWTPs. The study proved that the use of SS VF beds in full scale in dairy WWTPs would result in a significant decrease in pollutants’ load in reject water. In the analyzed case, decreasing the load of ammonia nitrogen was of greatest importance, as it constituted 58% of the total load treated in dairy WWTP and posed a hazard to the stability of the treatment process.
Author Wojciech Dąbrowski
Wojciech Dąbrowski,,
, Beata Karolinczak ZZWOŚ
Beata Karolinczak,,
- Department of Water Supply and Wastewater Treatment
, Magdalena Gajewska
Magdalena Gajewska,,
, Ewa Wojciechowska
Ewa Wojciechowska,,
Journal seriesEnvironmental Technology, ISSN 0959-3330
Issue year2017
Publication size in sheets0.5
Keywords in Englishaerobic stabilization, dairy wastewater treatment plant, filter press dewatering, reject water, subsurface vertical flow constructed wetlands
Languageen angielski
Not used for evaluationyes
Score (nominal)25
ScoreMinisterial score = 25.0, 19-12-2017, ArticleFromJournal
Ministerial score (2013-2016) = 25.0, 19-12-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 1.751 (2) - 2016=1.76 (5)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.