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Volume 2 Journal of Environmental Research
Page 10
JOINT EVENT
July 26-27, 2018 Rome, Italy
&
6th Edition of International Conference on Water Pollution & Sewage Management
4th International Conference on Pollution Control & Sustainable Environment
Linda Grinberga
Latvia University of Agriculture, Latvia
Linda Grinberga, J Environ Res 2018, Volume: 2
Ainis Lagzdins
Latvia University of Agriculture, Latvia
Storm water treatment in a subsurface constructed wetland in a farmyard in Latvia
The water treatment system examined in this study consists of a sedimentation pond as a pre-treatment plant, a water pump
and a horizontal subsurface flow constructed wetland with the surface area of 160 m2. This treatment system was installed
at the farm Mezaciruli, Zalenieki County, Jelgava region, in the middle part of Latvia, in August 2014 to improve storm water
quality collected from the farmyard and demonstrate applicability of constructed wetland as a suitable treatment option for
contaminated surface runoff. During the observation period of 32 months (2014-2017) water quality parameters such as total
suspended solids (TSS), nitrate - nitrogen (NO3-N), ammonium - nitrogen (NH4-N), total nitrogen (TN), orthophosphate -
phosphorus (PO4-P), and total phosphorus (TP) were monitored and nutrient removal efficiency of the system was calculated.
Nutrient concentrations in water samples collected at the inlet and outlet were compared. The monitoring results obtained
during this study showed that on average concentrations of TN and TP were reduced by 34% and 82%, respectively. Overall,
the subsurface flow constructed wetland displayed a steady decrease for all measured water quality parameters when average
monthly nutrient retention values were compared. However, in some cases, an increase in the amount of nutrients leaving the
constructed wetland was observed. The wetland retained suspended solids on average by 59% and similarity as for nutrients
showed occasional increase in concentration during the non-vegetation period (October to March). This study illustrated that
subsurface flow constructed wetland has a potential to reduce nitrogen and phosphorus concentrations in storm water.
Recent Publications
1. Grinberga L., Lagzdins A. (2017) Nutrient removal by subsurface flow constructed wetland in the farm Mezaciruli.
Research for Rural Development 2017: Annual 23rd International Scientific Conference Proceedings, Vol. 1, p. 160 –
165.
2. Sudars R., Berzina L., Grinberga L. (2016) Analysis of agricultural run-offmonitoring program results for estimation of
nitrous oxide indirect emissions in Latvia. In: Proceedings of the 15th International scientific conference "Engineering
for rural development". Jelgava, Latvia, Latvia University of Agriculture. Faculty of Engineering. Vol.15, p. 1030-1035
URL:
3. Lagzdiņš A, Jansons V, Sudārs R, Grinberga L, Veinbergs A and Abramenko K (2015) Nutrient losses from subsurface
drainage systems in Latvia. Acta Agriculturae Scandinavica, Section B - Plant Soil Science 65:66–79.
Biography
Linda Grinberga is a PhD student in Latvia University of Agriculture. She is a Departmental International Coordinator at the Faculty of Environment and Civil Engineering.
She is a Lecturer and Researcher at the Department of Environmental Engineering and Water Management. She has participated in nine scientific projects.