Cross-border network for knowledge transfer and innovative development in wastewater treatment WATERFRIEND HUSRB/1203/221/196 2nd Training course

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Cross-border network for knowledge transfer and
innovative development in wastewater
treatmentWATERFRIENDHUSRB/1203/221/1962nd
Training course Industry wastewater treatment
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2nd Training course
Waterfriend
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WASTE WATER PROBLEM IN VOJVODINA AND PRIORITY FOR
WASTE WATER TREATMENT IN SOME MUNICIPALITIES
Ivana Loncarevic, Biljana Pajin, Zita Šereš
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Population in Vojvodina and quantities of waste
water
Registration of 2012 Republic of
Serbia population of 7 565 761 people
Vojvodina - 1 995 679 (26.38) Based to the
study of Sustainable Development of Water Power
Engineering of Republic of Serbia
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VOJVODINA - 467 cities and settlements
32 gt 10 000 habitants 435 lt
10 000 habitants
Table 1. Population statistics for settlements in
Vojvodina
Number of settlements 135 119 56 47 19 18 14 7 7 3 32
Number of habitants 0-1000 1-2000 2-3000 3-4000 4-5000 5-6000 6-7000 7-8000 8-9000 9-10000 gt 10000
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WHICH QUANTITIES OF WASTE WATER IS IT ABOUT?

• Erdevik settlement with population of 3 350
  people
• Accumulations on 2 brooks Moharac and Bruje
• Lake Bruje is 990 m long with max width of 175 m
  and average depth of 3-5 m.

European norm of waste water plant capacity - 150
l/habitant/day volume of lake quantity of
waste water of one settlement with population of
6 200 habitants/year (5 500 - 6 800 - Titel,
Rumenka, Kovilj, Kisac, Bac, Kljajicevo,
Omoljica, Dolovo, Jabuka, Kovacica, Padina,
Bavaniste, Banatski Karlovac, Horgos, Mol,
Melenci, Novo Milosevo, itc).
V 340 000 m3
Lake Bruje
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Problem with waste water in settlements without
sewer system

• Water supply system v
• Sewer system /
• Septic tanks v

• In every of previous mentioned settlements every
  year one of such lakes goes underground!!!
• Septic tanks are almost out of function in some
  period of the year.

• Waste water mixes with underground water and it
  remains in the subsurface.

• Underground layer in settlements cannot receive
  and purify all produced waste water - very often
  it comes to the surface.

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Settlements are contaminated by their own waste
water
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You can never know where it comes from!
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• How people are supposed to solve the problem???
  dig new septic tanks, use old wells as septic
  tanks
• In some settlements - number of septic tanks
  number of habitants.
• Septic tanks are emptied by cisterns around
  settlements into lagoons.

irrigation canal
lagoon

• Emptying septic tanks with cisterns is not
  efficient either.
• Waste water mixed with underground water slowly
  flows towards ground depression into irrigation
  canals nearby.
• It stinks and becomes a source of disease.

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Lagoon
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Situation with waste water in Novi Sad

• Novi Sad has a population of 350 000 habitants
  with surrounding settlements.

• Waste water on 5 points into the Danube.
• 3 drainages on the left riverbank and 2 on the
  right.

• 70 000 m3 waste water per day volume of Bruja
  lake in 5 days.
• 1 m3/s of waste water - 86 400 m3 per day.

• The low water flow of Danube 1 300 m3/s - 0.77
  of waste water.
• Minimal water flows are in January and February
  (780 m3/s) - 1.28 of waste water for that flow.

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• All the above data refers to the used water.
• Since Novi Sad has a general sewer system, waste
  water mixes with precipitation water and lets out
  into the Danube.
• Around 38 000 000 m3 of used water and about 9
  time less amount of precipitation water (4 4
  500 000 m3) is released by the sewer system into
  the Danube per year.

• According to the study of Sustainable Water Power
  Engineering of the Republic of Serbia

per year
30
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Waste water is released into the Danube without
any previous water treatment.
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• Total situation regarding waste water treatment
  in Vojvodina is very bad and needs to be
  improved!
• Less than 20 waste water treatment plants are in
  function.

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• PRIORITY
• Social community should help those habitants that
  don't have sewer system, but have a big problem
  with waste water.
• Waste water treatment plants should be provided
  for cities that don't have problems with waste
  water, but let out unpurified into the rivers and
  canals.

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2nd Training course
Waterfriend
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THANKS!
Presentation/lecture has been produced with the
financial assistance of the European Union. The
content of the presentation/lecture is the sole
responsibility of University of Novi Sad,
Faculty of Technology and can under no
circumstances be regarded as reflecting the
position of the European Union and/or the
Managing Authority.