Separation by flotationwith the MUSLING™ process

Jan Henrik Knudsen

The MUSLING™ - history

The first DAF-plant was constructed already in 1898:

• 1898 DAF for oil, F.E. Elmore.• 1902 DAF with dissolved air, G.D.Delport.• 1929 Sulitjelma Mining Company. The largest

DAF in the world in 1929.• 1981 MUSLING™ was invented and patented.• 2001 JO Water acquires the patent.• 2005 MUSLING™ Generation 2 is patent pending.• 2005 AnoxKaldnes acquires JO Water

The MUSLING™

• The MUSLING® has been thoroughly documented and tested since 1981.

• In 2006 there are some 140 plants in operation.

Flotation I

• Density• Velocity• You can`t flotate

rocks.

Flotation II

Dispersion water productionNIKUNI – one step

• A NIKUNI pump is a turbine pump which can suck air for one-step dispersion water production.

• The dispersion water is produced without use of compressors, ejectors, pressure tanks.

• Pressure 4 bar.• Energy consumption 0,4-0,5

kWh/m3.• Bubbles 20-80 µm. • Climbing speed 10-20

cm/min

Ｐ

ＦLS

PG

Pressure pump

Compressor

Static mixer

Air exit

Pressurized Dissolve tank

Ejector

PG

PG

NIKUNI Regenerative Turbine Pump

Air

Air exit（no adjustment）

Air separation tank

Pressurized water

Intake

CONVENTIONAL METHOD

NIKUNI METHOD

NIKUNI one step

Dispersion water production

0

50

100

150

200

250

300

0 1 2 3 4 5 6 7 8

Pressure abs bar

Satu

rate

d ai

r l/m

3

0510152025

Dispersion water production

Necessary increase of dispersion water volume as a function of water temperature

0 %

5 %

10 %

15 %

20 %

25 %

30 %

35 %

0 5 10 15 20 25 30

Temperature degrees C

Flotation II

Suspended solids

Necessary dispersion water in % of treated water flow at 6 bars and 7 degrees C

0 %10 %20 %30 %40 %50 %60 %70 %80 %90 %

100

200

300

400

500

600

700

800

900

1000

1100

1200

1300

1400

1500

1600

1700

1800

1900

2000

SS mg/l

% o

f the

trea

ted

wat

er fl

ow

Volum dispergeringsvann ved L/S=0,03

MUSLING™ - Generation 2

MUSLING™ - generation 2

• Inlet• Chemical dosing -

flocculation• Dosing dispersion

water• Hydraulic

distribution• Acceleration area• Separation area• Decanting area• Outlet• Sludge hopper

MUSLINGEN™

Typical P&ID

2 m2

MUSLING™

Bortelid RA, Åseral kommune

• Mountain cabins• 30 m3/h• 3 m2 surface area• 3% DS

Bortelid RA, Åseral kommune

• Chemical precipitation• 70 % removal of organic

componds• Qmaksdim = 460 m3/h• 2 lines• 4 pcs. FAS110• 40 m2 surface area• 4% DS

Heistad RA, Porsgrunn kommune

Heistad RA, Porsgrunn kommune

Vårnes RA, Stokke kommune

• Chemical precipitation• 250 - 500 m3/h• 3 pcs. MUSLING™ FA110• 30 m2 surface area• 3% DS • May 2000

Vårnes RA, Stokke kommune

Vårnes RA, Stokke kommune

0

1

2

3

4

5

6

7

23.01

.2001

20.02

.2001

20.03

.2001

24.04

.2001

15.05

.2001

19.06

.2001

10.07

.2001

14.08

.2001

11.09

.2001

09.10

.2001

13.11

.2001

11.12

.2001

12.01

.2002

19.02

.2002

19.03

.2002

23.04

.2002

0

20

40

60

80

100

120

Tot-P innTot-P utSS utRenseeffekt %

Logotypes