Pollution Treatment on the Glinščica, Slovenia

General

National Id:

Slovenia_02

Summary:

The innovative ecoremediation (ERM) system, which consist in a sedimentation pond for the deposition of coarse particles and reduction of current flow velocity, for treatment of the polluted tributary of Glinščica, Slovenia, was installed in 2006 by Limnos Itd.

NUTS Code:

Zahodna Slovenija

RBD code:

SI_RBD_1

Transboundary:

0

Data provider:

REC

Source(s):

Case study: Ecoremediation System (ERM) for treatment of polluted tributary of Glinscica, Slovenia

Run-off treatment of highly fluctuating waters with subsurface vegetated drainage ditch and river bed with meanders

Vegetated ditches for treatment of surface water with highly fluctuating water regime

NWRM(s) implemented in the case study:

Basins and ponds

Longitude:

14.45249

Latitude:

46.0761

Site information

Climate zone:

cool temperate moist

Mean rainfall:

1343

Mean rainfall unit:

mm/year

Average temperature:

9,69999980926514

Type:

Case Study Info

Light or indepth?:

Light

Average slope range:

0-1%

Vegetation class:

Marsh vegetation

Monitoring maintenance

Monitoring impacts effects:

1

Monitoring location:

In-Stream

Monitoring parameters:

Hydro-morphological, physical and chemical, in addition to water and sediments' toxicity, reed productivity and ERM system's plant diversity.

Monitoring upstream station:

The water level was measured at Inflow and at additional 6 sampling points in the VDD.

Monitoring downstream station:

Outflow of the VDD and the outflow of the RBM

Performance

Performance impact estimation method:

Catchment outlet

Performance impact estimation information:

pH, EC, DO and T were measured with portable meters WTW Multiline P4 according to Standard Methods. Hydraulic residence time (HRT) was measured with the tracer test with CaCl on 25.7.2007 and 26.7.2007. And statistical analyses.

Biophysical impacts

Information on retained water:

118.7 m3

Water quality overall improvements:

Positive impact-WQ improvement

Information on Water quality overall improvements:

The results showed efficient removal of BOD5 (9%), organic N (24%), ammonia (7%), nitrites (84%), nitrates (68%), total N (40%) and total P (3%) in the entire ERM system in the third season. Vegetated ditch was efficient in removal of ammonia (38%), nitrites (91%) and nitrates (63%) and meandered stream was efficient in removal of total P (10%). With the exception of suspended and dissolved solids, pollutants concentrations at the end of the ERM system stayed within the permitted levels for outflow. The results showed the entire ERM system to be more efficient in removal of nitrites and ammonia in season 2008/2009 compared to previous year. Removal of sediments from the pond proved to be essential for efficiency of vegetated ditch, since the ditch reached higher efficiency for almost all parameters after maintenance work in the summer 2008

Water quality Improvements Phosphorus (P):

3

Water quality Improvements (P) unit:

% reduction pf pollutant

Water quality Improvements Nitrogen (N):

40

Wq Improvements n unit:

% reduction pf pollutant

Water quality Improvements (TSS):

SS increased

Soil quality overall soil improvements:

Negative impact-SQ deterioration

Lessons, risks, implications...

Key lessons:

The research showed regularly maintained ERM system efficiently decreased pollutants in the tributary of Glinščica and that combination of vegetated ditch and meandered stream for this purpose is an adequate and promising technology that can be further developed.

Success factor(s):

Financing:

Barrier:

Driver:

Socio-economic

Costs capital information:

The cost was 100 Euro/m2 for investment

Costs operation maintenance:

Operation is about 30-50 Euro/m2/year

Ecosystem impact climate regulation:

Not relevant for the specific application

Ecosystem erosion control:

0

Information on Ecosystem erosion control:

Erosion increased

Policy, general governance and design targets

Policy description:

Riparian development, pollution incident

Policy pressure:

Policy requirement directive:

Policy impact:

Policy wider plan:

Policy area:

Policy target:

Target purpose
Runoff control
Pollutants Removal
Improved Biodiversity
Oher Societal Benefits

Design & implementations

Application scale:

Field Scale

Installation date:

2006-01

Performance timescale:

< 1 year

Size:

225

Size unit:

m2

Inflow volume:

260

Inflow volume unit:

m3/day

Public consultation:

1

Design contractual arrangement:

Design consultation activity:

Activity stage	Name	Key issues	Comments
	Improved public acces

Design land use change:

Design authority:

Authority type	Role	Responsibility	Name	Comments
Local water authority	Financing		MOL-Municipality of the Ljubljana
			Limnos ltd.

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Last updated: 12 Jan 2015 | Top

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Pollution Treatment on the Glinščica, Slovenia

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