FINNLAND: STRATEGIE UND VORGEHEN AM BEISPIEL HELSINKI€¦ · Finnland: Strategie und Vorgehen Am Beispiel Helsinki/Laura Rossi/25.10.2018 RAVITA sludge quality Heavy metal dewatered

FINNLAND: STRATEGIE UND VORGEHEN AM BEISPIEL HELSINKI

Dipl.-Ing. Laura Rossi

Helsinki Region Environmental Services Authority (HSY) Viikinmäki WWTP

Helsinki/Finland

[email protected]

+358 50 4123 159

FOTO

Finnland: Strategie und Vorgehen Am Beispiel Helsinki/Laura Rossi/25.10.2018

What

we do

We produce and organise

water services, waste

management services and

regional information

Residents and

companies in the

Helsinki Metropolitan Area:

1.1 million people

Our

customers

Our member

municipalities

Helsinki

Espoo

Vantaa

Kauniainen

Turnover ca.

€ 354 millionEmployees

745

Premises

12

Finnland: Strategie und Virgehen Am Beispiel Helsinki/Laura Rossi/25.10.2018

Helsinki Region Environmental Services Authority (HSY)


Current wastewater and sludge management at HSY


Recycling of Phosphorus in WWTPs in Finland

• Only 13 large WWTP (>100 000 PE)• Total ~ 520 WWTPs

• Treatment plants are build for chemical P removal

• Sludge is mostly composted

• In 2016, 40 % of treated sewage sludge was used in agriculture

At the moment, no reguirements for WWTPs to recover P more efficiently


Technologies available on the markets for more efficient P recovery are not directly suitable for WWTPs in Finland

• No biological P removal

• No sludge incineration


RAVITATM for effective P recovery


Combi process with N recovery


Research

- 1000 PE pilot plant at Viikinmäki WWTP- Post-precipitation and removal with disc filter

- Chemical sludge dewatering

- Lab scale- Dissolution

- Solvent-solvent extraction

- Technical readiness level 5-6 (max 9)


1. With 1-step precipitation >80 % of P can be transferred to recovery part

2. With optimum parameters, 85 % of aluminum could be dissolved

3. In solvent-solvent extraction 97 % of aluminum was possible to transfer to organic phase

Results

27%

48%

1%

1%

1%

22%

AlPO4 Al(OH)3

FeOH3 CaCO3

SiO2 Org

RAVITA sludge contains mostly AlPO4 and Al(OH)3


RAVITA sludge quality

Heavy metaldewatered

RAVITA sludgeLimit miniRec *

mg/kg P mg/kg P

Cadmium 4 25

Mercury 1 10

Chromium 181 1 000

Arsenic 14 100

Lead 28 500

Copper 764 3 000

Nickel 194 500

Zinc 4 583 10 000

Organic compound Application Dewatered

RAVITA sludge

(mg/kg P)

Dewatered VKM sewage

sludge (mg/kg P)

Polybrominated

diphenylethers (BDE)

Flame retardantstetraBDE#47 0,0065 N.A

PentaBDE#99 0,0064 N.A

DecaBDE#209 0,0988 N.A

Bisfenol-A (BPA) Starting material

for the synthesis

of plastics

LOD 11,9

(meta+para) -cresol precursor for

various

applications

105 667

DI-(2-ethylhexyl) Phthalate plasticizers LOD 370

perfluorooctanesulfonate

(PFOS)

pesticide etc. LOD 0,2

Diclofenac Pharmaceuticals

and Personal Care

Products

LOD 1,8

Carbamazepine LOD 0,8

*K. Schenk, Phosphorus Recycling in Switzerland, presentation at IWA World Water Congress, September 2018, Tokyo.


FUTURE STEPS

TECHNICAL steps• RAVITA DEMO plant

• Increase of TRL (now 5 - 6)• Dissolution and separation of

RAVITA sludge into the DEMO scale

• Energy and mass balances• More analyses of the end product

quality• Hazardous substances and

microplastics

BUSINESS steps• Ecosystem mining for potential

partners (out of the box) and clients• End users ideas and comments needed

to complete the business concept

THANK YOU!

The RAVITA project has granted funding from the Finnish Ministry of the Environment RAKI Programme 2014-2017.

The RAKI RAVITA DEMO plant has been chosen as a part of the Finnish Government’s key project on the circulareconomy 2017-2018

RAVITA Process was selected as one of the three winners in BONUS Return competition in 2018.

RAVITA won the SITRA Award on Municipal Recycling Act in 2018.

Nominee for the Nordic Council Environment Prize 2018

Helsingin seudun ympäristöpalvelut –kuntayhtymäSamkommunen Helsingforsregionens miljötjänsterHelsinki Region Environmental Services Authority


Documents

FINNLAND: STRATEGIE UND VORGEHEN AM BEISPIEL HELSINKI€¦ · Finnland: Strategie und Vorgehen Am Beispiel Helsinki/Laura Rossi/25.10.2018 RAVITA sludge quality Heavy metal dewatered