Modeling of Pollutants Removal in Subsurface Vertical Flow and Horizontal Flow Constructed Wetlands

Wojciech Dąbrowski , Beata Karolinczak , Paweł Malinowski , Dariusz Boruszko

Abstract

Reject water is a by-product of every municipal and agro-industrial wastewater treatment plant (WWTP) applying sewage sludge stabilization. It is usually returned without pre-treatment to the biological part of WWTP, having a negative impact on the nitrogen removal process. The current models of pollutants removal in constructed wetlands concern municipal and industrial wastewater, whereas there is no such model for reject water. In the presented study, the results of treatment of reject water from dairy WWTP in subsurface vertical flow (SS VF) and subsurface horizontal flow (SS HF) beds were presented. During a one-year research period, SS VF bed reached 50.7% efficiency of TN removal and 73.8% of NH4+-N, while SS HF bed effectiveness was at 41.4% and 62.0%, respectively. In the case of BOD5 (biochemical oxygen demand), COD (chemical oxygen demand), NH4+-N, and TN (total nitrogen), the P-k-C* model was applied. Multi-model nonlinear segmented regression analysis was performed. Final mathematical models with estimates of parameters determining the treatment effectiveness were obtained. Treatment efficiency increased up to the specific temperature, then it was constant. The results obtained in this work suggest that it may be possible to describe pollutant removal behavior using simplified models. In the case of TP (total phosphorus) removal, distribution tests along with a t-test were performed. All models predict better treatment efficiency in SS VF bed, except for TP.
Author Wojciech Dąbrowski
Wojciech Dąbrowski,,
-
, Beata Karolinczak (FEE / DWSWT)
Beata Karolinczak,,
- Department of Water Supply and Wastewater Treatment
, Paweł Malinowski
Paweł Malinowski,,
-
, Dariusz Boruszko
Dariusz Boruszko,,
-
Journal seriesWater, ISSN 2073-4441, (A 30 pkt)
Issue year2019
Vol11
No1
Pages1-17
Publication size in sheets0.8
Keywords in English P-k-C* model; subsurface vertical flow constructed wetlands; subsurface horizontal flow constructed wetlands; reject water; treatment modeling; dairy wastewater treatment plant; anaerobic sewage sludge digestion
ASJC Classification2312 Water Science and Technology; 1104 Aquatic Science; 3305 Geography, Planning and Development; 1303 Biochemistry
DOIDOI:10.3390/w11010180
URL https://www.mdpi.com/2073-4441/11/1/180
Languageen angielski
File
water-11-00180.pdf 1.84 MB
Score (nominal)30
ScoreMinisterial score = 30.0, 11-03-2019, ArticleFromJournal
Ministerial score (2013-2016) = 30.0, 11-03-2019, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2017 = 1.007; WoS Impact Factor: 2017 = 2.069 (2) - 2017=2.25 (5)
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