Waste water treatment - conforming to EU Waste Water Directive study case of Tg. Mures

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Waste water treatment - conformingto EU Waste
Water Directivestudy case of Tg. Mures
Otto DARABANGeneral DirectorSC Compania
Aquaserv SA
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Who we are?

• Status regional operation company shareholders 6
  Local Councils and Mures County Council Consiliul
  Judetea Mures
• Turnower38 mil RON (1 Euro3.7 RON)
• Employees820
• Operation locations 6 city and 14 locations in
  rural areea
• Infrastructure
• water treatment plants 7
• waste water treatment plants 6
• water network 936km
• sewers 620km
• Servicies
• drinking water treatmentdistribution 15 mil mc/y
• waste water collectiontreatment 14,1 mil mc/y
• Clients
• hoseholds 230,486
• industrialinstitutions 15,107

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History

• 1909 - 1911
• 34 km combined sewer
• preliminary treatment plant
• pumping station

• 1967 -1979
• primary treatment
• two digesters 2x1500 mc
• sludge drying beds 0.25 ha
• sludge lagoon 40000 mc

• 1980 -1989
• secondary treatment (900 l/s)
• digesters 2x4000 mc
• gr. thickeners 2x1568 mc
• biogas holders 2x1000 mc
• sludge pumping stations
• sludge drying beds 1.85 ha

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New institutional framework
Low treatment efficiency
No finances from the Government
High ware of the equipment
Waste water treatment
Low service tariffs
High electrical consumption
More stringent effluent standards
High energy tariffs
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MUDP I Project-trying to survive

• Objective
• Investments in infrastructure
• Realization of the operators financial
  independence
• Management improving

• Budget Total 6.6 Mil (3.2 Mil for WWTP)
• 50 EBRD loan
• 45 Romanian Government
• 5 Local Council Tirgu Mures

Period 1995-2001
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MUDP I Project-scope of the works

• Extension of the secondary treatments capacity
• Finally clarifier
• Activated sludge pumping station

• Improving sludge treatment
• Digesters rehabilitation
• Sludge thickening
• Sludge dewatering

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Project CHP-new resources
Objective Reduce CO2 emission

• Budget total 1.1 Mil (for WWTP)
• 1 Mil Dutch Governments grant
• 0.1 Mil companys contribution

• CHP plant
• fuel biogas/CH4
• capacity 450 kWe730 kWth

Period 1998-2000
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ISPA Project-EU support
Objective of the project to rehabilitate the
existing infrastructure

• Budget
• Total 28 Mil Eu (21 UE grant, 7 EBRD loan)
• Comp B WWTP - 8.5 Mil Eu

• Results of the project
• waste water treatment for a perspective year
  2020, including surrounding villages
• comply with 271/91/EEC
• reducing risk regarding public health
• decreasing pollution downstream Mures River

Contractor Allewijse Spaans Babcock (The
Netherlands)
Finish Dec 2007
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ISPA Project-scope of the works(1)

• Preliminary treatment new structure
• screens (coarse fine)
• compactor for screenings
• combined sand/grease separator
• sand washing unit

• Primary treatment
• repair of primary clarifiers
• replacing the PC bridges
• automated sludge withdrawal system
• refurbishment of sludge pumping station
• refurbishment of decanted water pumping station

• Storm management
• refurbishment of the existing balancing tank
  (sugar factory)
• storm water return pumping station

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ISPA Project-scope of the works(2)

• Secondary treatment
• refurbishment of the biological reactor
• refurbishment of activated sludge pumping station
• automated sludge withdrawal system
• refurbishment of sludge pumping station
• refurbishment of decanted water pumping station

• Power supply
• island operation for CHP
• refurbishment of transformer house
• replacing main power cables

• Process control
• complete automation
• new SCADA system
• automated sampling system

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Where we are now?

• Treatment capacity 1200 l/s
• Sludge cake (18-20 DS)
• 22,000 mc/y
• Biogas produced
• 1,400,000 mc/y
• Energy recovered
• 3,300 MWh/y electrical
• 5,100 MWh/y thermal

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Performance of the plant
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What is left?

• Implement Directive 91/271/EEC in the operation
  region of Compania Aquaserv according to the EU
  negotiation documents and improuving the sludge
  managementdisposal
• Master Plan for Mures county (2037) identyfies
  1,320 mil Euro, from which
• drinking water 650 mil Euro
• waste water 670 mil Euro
• first priority investments prepared for EU
  cohesion founds 89 mil Euro, from which
• collection systems 27 mil Euro (20 ext. 7
  reab.)
• WWTP 18 mil Euro (10 newTP 8 reab.)
• DWT facilities 31 mil Euro (15 new TP 16
  reab.)
• water distrib. systems 13 mil Euro (8 ext. 5
  reab.)

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Conclusions
WATER means LIFE! WASTE WATER TREATMENT means
CIVILISATION !

• High efforts were made by community of TG. Mures
• Operator companys contribution
• identifyingimplementing projects
• properly operation of the infrastructure

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Thank you!