waste water treatment - conforming to eu waste water directive study case of tg. mures otto daraban...

Waste water treatment - conformingWaste water treatment - conformingto EU Waste Water Directiveto EU Waste Water Directive

study case of Tg. Muresstudy case of Tg. Mures

Otto DARABANOtto DARABAN

General DirectorGeneral DirectorSC Compania Aquaserv SC Compania Aquaserv

SASA

Who we are?Who we are?

Status: regional operation company shareholders 6 Local Councils and Mures County Council Consiliul Judetea Mures

Turnower:38 mil RON (1 Euro=3.7 RON) Employees:820Operation locations: 6 city and 14 locations in rural areeaInfrastructure:

•water treatment plants 7•waste water treatment plants 6•water network 936km•sewers 620km

Servicies:•drinking water treatment&distribution 15 mil mc/y•waste water collection&treatment 14,1 mil mc/y

Clients:•hoseholds 230,486•industrial&institutions 15,107

HistoryHistory

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

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

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

New institutional framework New institutional framework

Waste water treatment

Waste water treatment

Low treatment efficiency

High ware of the equipment

High electrical consumption

More stringent effluent standardsHigh energy tariffs

Low service tariffs

No finances fromthe Government

MUDP I Project-trying to MUDP I Project-trying to survivesurvive

Objective: • Investments in infrastructure• Realization of the operator’s 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

MUDP I Project-scope of the worksMUDP I Project-scope of the works

Extension of the secondary treatment’s capacity

• Finally clarifier• Activated sludge pumping

station

Improving sludge treatment

• Digester’s rehabilitation• Sludge thickening• Sludge dewatering

Project CHP-new resourcesProject CHP-new resources

Objective: Reduce CO2 emission

Budget: total 1.1 Mil $ (for WWTP)

• 1 Mil $ Dutch Government’s grant

• 0.1 Mil $ company’s contribution

Period: 1998-2000

CHP plant

• fuel: biogas/CH4

• capacity: 450 kWe+730 kWth

ISPA Project-EU supportISPA 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

Contractor: Allewijse & Spaans Babcock

(The Netherlands)

Finish: Dec 2007

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

ISPA Project-scope of the works(1)ISPA Project-scope of the works(1)

Preliminary treatment: new structure

• screens (coarse & fine)• compactor for screenings• combined sand/grease

separator• sand washing unit

Storm management• refurbishment of the

existing balancing tank (sugar factory)

• storm water return pumping station

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

ISPA Project-scope of the works(2)ISPA Project-scope of the works(2)

Power supply• island operation for CHP• refurbishment of

transformer house• replacing main power

cables

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

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

Where we are now? 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

Conc. (mg/l)

Efficiency (%)

Non conform samples

Conc. (mg/l)

Efficiency (%)

Non conform samples

BOD-5 25 70-90 18 22.5 81 22COD-Cr 125 min. 75 18 42.4 78 11TSS 35 min. 90 18 28.6 92 7N tot 10 70-80 0 18.6 22.6 140P tot 1 min. 80 0 2.9 15.8 17

Parameter91/271/EEC Limits Aquaserv resoults in 2007

Performance of the plant

What is left?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 management&disposal

•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.)

ConclusionsConclusions

WATER means LIFE!

WASTE WATER TREATMENT means

CIVILISATION !

High efforts were made by community of TG. Mures

Operator company’s contribution• identifying&implementing projects• properly operation of the infrastructure

Thank you!