Next Article in Journal
Uptake of Sb(V) by Nano Fe3O4-Decorated Iron Oxy-Hydroxides
Previous Article in Journal
Effect of Aluminium Salt Dosing on Activated Sludge Settleability Indicators: A New Settleability Model Development
Open AccessArticle

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

1
Faculty of Civil and Environmental Engineering, Bialystok University of Technology, 45E Wiejska St., Bialystok 15-351, Poland
2
Faculty of Building Services, Hydro and Environmental Engineering, Warsaw University of Technology, Nowowiejska 20, Warsaw 00-653, Poland
*
Authors to whom correspondence should be addressed.
Water 2019, 11(1), 180; https://doi.org/10.3390/w11010180
Received: 28 December 2018 / Revised: 16 January 2019 / Accepted: 19 January 2019 / Published: 21 January 2019
(This article belongs to the Section Water and Wastewater Treatment)
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. View Full-Text
Keywords: 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 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
Show Figures

Figure 1

MDPI and ACS Style

Dąbrowski, W.; Karolinczak, B.; Malinowski, P.; Boruszko, D. Modeling of Pollutants Removal in Subsurface Vertical Flow and Horizontal Flow Constructed Wetlands. Water 2019, 11, 180.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map

1
Back to TopTop