KAZALCI OKOLJA

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In recent years, the amount of wastewater treated by secondary or tertiary treatment processes increased, while primary treatment processes have closed. The amount of wastewater treated through secondary treatment processes increased by 150 % since 2000 or from 30 million m3 (in 2000) to almoust 45 million m3 (in 2019). There were almost no tertiary wastewater treatment processes in Slovenia in 2000, and in 2019, 72% of wastewater or 113 million m3 of wastewater was treated by tertiary process.


This indicator shows the quantity of industrial and municipal/urban wastewater and the share of population whose wastewater is treated in municipal/urban and combined wastewater treatment plants classified according to the level of treatment under the methodology determined in the Urban Waste Water Treatment Directive. This methodology was also adopted in the Slovenian Decree on the Emission of Substances in Waste Water Discharged from Urban Waste Water Treatment Plants (OJ RS No 35/96, 90/98, 31/01, 62/01, 41/2004-ZVO-1). In general terms, primary treatment is mechanical and/or chemical. It includes removal of settleable organic and inorganic solids by sedimentation and removal of materials that float (scum) by skimming. Secondary treatment is biological. It removes most organic matter and 20–30% of nutrients. Tertiary treatment removes (apart from organic matter) most nutrients (nitrogen, phosphorus).


Charts

Figure VD02-1: Share of Slovenian population whose urban waste water was treated, in individual years, in urban or common waste water treatment plants of a certain treatment level
Sources: 

Waste Water Treatment Plants Database, Slovenian Environment Agency, 2020; Statistical Office of the Republic of Slovenia, 2021 (26. 03. 2021)

Show data

primary[%]

secondary[%]

tertiary[%]

primary[number]

secondary[number]

tertiary[number]

population - total[number]

1998

27.60

11.29

1.48

547253

223824

29329

1982603

1999

25.11

13.60

1.95

499358

270588

38832

1988887

2000

26.66

11.88

1.89

530682

236410

37656

1990272

2001

24.07

16.04

1.42

479455

319620

28289

1992035

2002

21.95

18.97

1.40

437976.60

378491

27982

1995718

2003

21.92

19.74

1.53

437652.80

394206

30489

1996773

2004

21.04

22.65

8.88

420195.80

452372

177409

1997004

2005

19.69

22.32

12.13

394063

446719

242719

2001114

2006

3.90

39.52

12.15

78431

793732.60

244043

2008516

2007

3.85

39.94

12.35

77688

806478.80

249462

2019406

2008

1.31

41.29

13.49

26580

835204.40

272897

2022629

2009

0.45

39.70

16.38

9264

810742.40

334616

2042335

2010

0.46

40.19

17.12

9506

823564.60

350834

2049261

2011

0.46

40.28

18.21

9350

826681.60

373818

2052496

2012

0.46

38.32

20.10

9403

787858.40

413382

2056262

2013

0.45

36.12

23.34

9350

743798.20

480557

2059114

2014

0.45

34.70

24.94

9264

715447

514199

2061623

2015

0

31.71

28.31

0

654286.60

584012

2063077

2016

0

28.56

33.51

0

589516

691651

2064241

2017

0

24.01

41.99

0

496167

867638

2066161

2018

0

23.71

43.51

0

490785

900739

2070050

2019

0

23.87

43.64

0

498795

911810

2089310

Figure VD02-2: Quantity of waste water treated in urban or common waste water treatment plants of a certain treatment level
Sources: 

Waste Water Treatment Plants Database, , Slovenian Environment Agency, 2021 (26. 03. 2021)

Show data
primary[1000 m3]secondary[1000 m3]tertiary[1000 m3]
199866151.3325620.202801.33
199962145.9533223.484308.74
200068076.8130131.583370.87
200155558.4533590.203092.81
200257903.6938674.662748
200346980.9638484.782633.08
200443996.7948404.5112744.28
200548536.0245641.8726656.19
20068779.2472965.4927932.59
20078035.1777945.4127209.49
20084560.3090994.0230693.96
2009466.8190124.3541063.11
2010457.6298010.3947192.61
2011450.0076962.4542545.15
2012433.3782198.5948225.55
2013446.5084355.5165568.32
2014434.5078101.5278043.75
2015059527.8573587.24
2016057034.6092501.12
2017045311.92104983.01
2018046292.84115767.27
2019045054.14113137.87

Goals

  • To ensure protection of all surface and groundwater bodies on the territory of the Republic of Slovenia from organic pollution, nitrogen and phosphorus input and microbiological pollution.
  • To construct municipal wastewater treatment plants and sewer networks for all agglomerations specified in the Operational programme for the discharge and treatment of urban wastewater.
  • To insure proper collection, discharge and treatment of urban wastewater by the end of 2021 with construction of small treatment plants for individual buildings in sensitive areas and by the end of 2030 in all other areas.

 

 



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