dep. of sanitary engineering membranelagoon wildberg – upgrading of wastewater lagoons by membrane...

Dep. of Sanitary Engineering

Membranelagoon Wildberg –

Upgrading of Wastewater Lagoons by Membrane Technology

Dipl. Geogr. Katharina Teschner Technical University Berlin, Germany

Research Project

Dipl. Geogr. Katharina Teschner METU 10.06.2005


Research Background


Problem in arid and semiarid regions

Drinking water

supply

Agricultural

irrigation

Problem in temperate climates

Reduction of surface water quality due to loading

by effluent of overloaded treatment plants

1

2

Need for waste water reuse

Need for improving effluent quality


Decentralised Wastewater Treatment


Wastewater lagoons are applied worldwide:

easy to construct

easy to operate and maintain

low investment and running costs

In Germany: more than 1000 lagoons, mainly in rural areas standards according to ATV A 201 giving design criterias

Standards also exist in many other countries.

Sedimentation lagoons

Naturally aerated lagoons

Artificially aerated lagoons

Polishing lagoons

Types:


Decentralised Wastewater Treatment


Huber VRM membrane unit

membrane module

Membrane bioreactors (MBR) is the latest development in wastewater treatment

small footprint reduced sludge production

disinfection without using chemicals

dropping investment costs

several systems available:

Huber, Zenon, Kubota

In Germany:

more than 10 large scale plants,

the largest for 80 000 inhabitants

started operation in 2004


HUBER VRM


solid/liquid seperation

effluent free from pathogenic microorganisms

high-quality polymer membranes

pore width: 38 nm

semi cross flow system

permeation vacuum pressure (<200 mbar)


Combined lagoon-membrane system


Adoption of membrane technology to wastewater lagoons

Transfer of simple wastewater lagoons to membranelagoons


Combined lagoon-membrane system


considerable increase

of biomass in the

lagoon

Advantages

smaller volume (less than 1

m³/inh. instead of 10 m³/inh.)

smaller lagoon surface

minimizing evaporation losses

effluent free of bacteria, helminth eggs and others

no formation of dangereous by-products

different ways of operation possible with or without nitrification


TP Wildberg


aerated lagoon 1

aerated lagoon 2

screen VRM

municipal wastewater

seperated sewer system

desigend for 900 inhabitants

700 inhabitants connected

influent

efffluent

permeate

surface water

polishing lagoon

clarifying lagoon

Pilotplant Wildberg


TP Wildberg


Aerated lagoons


TP Wildberg


Clarifying lagoon

Polishing lagoon


TP Wildberg


Pilotplant Wildberg

HUBER VRM 20/15

Membraneplates 60

Membranesurface 45 m²

Membranematerial PES

Turnings 2/min.

Flux (gros) 30 l/(m²*h)

Transmembranepressure 300 mbar

Cross-Flow 50 m³/h

Aeration 16 m³/h

Volume 4,5 m³


TP Wildberg


Pilotplant Wildberg

DS concentration

1-1,5 g/l

up to 15 g/l


TP Wildberg


Pilotplant Wildberg


TP Wildberg


Transmembranepressure/

Flow

bad operation conditions

good operation conditions


TP Wildberg


Teichkläranlage Wildberg0

10

20

30

40

50

60

70

80

90

100

11.08

.200

4

25.08

.200

4

08.09

.200

4

22.09

.200

4

06.10

.200

4

20.10

.200

4

03.11

.200

4

17.11

.200

4

01.12

.200

4

15.12

.200

4

29.12

.200

4

12.01

.200

5

26.01

.200

5

09.02

.200

5

23.02

.200

5

09.03

.200

5

23.03

.200

5

06.04

.200

5

20.04

.200

5

04.05

.200

5

18.05

.200

5

CS

B A

bb

au

[%

]

Teiche

VRM


10

20

30

40

50

60

70

80

90

100

23.09

.2004

07.10

.2004

21.10

.2004

04.11

.2004

18.11

.2004

02.12

.2004

16.12

.2004

30.12

.2004

13.01

.2005

27.01

.2005

10.02

.2005

24.02

.2005

10.03

.2005

24.03

.2005

07.04

.2005

21.04

.2005

05.05

.2005

19.05

.2005

BS

B5 A

bb

au [

%]

Teiche

VRM

COD degradation

BOD5 degradation


TP Wildberg



10

20

30

40

50

60

70

80

90

10011

.08.2

004

25.08

.200

408

.09.2

004

22.09

.200

406

.10.2

004

20.10

.200

403

.11.2

004

17.11

.200

401

.12.2

004

15.12

.200

429

.12.2

004

12.01

.200

526

.01.2

005

09.02

.200

523

.02.2

005

09.03

.200

523

.03.2

005

06.04

.200

520

.04.2

005

04.05

.200

518

.05.2

005

NH

4 A

bb

au

[%

]

Teiche VRMTeichkläranlage Wildberg

0

10

20

30

40

50

60

70

80

90

100

110

120

130

28.0

9.20

04

12.1

0.20

04

26.1

0.20

04

09.1

1.20

04

23.1

1.20

04

07.1

2.20

04

21.1

2.20

04

04.0

1.20

05

18.0

1.20

05

01.0

2.20

05

15.0

2.20

05

01.0

3.20

05

15.0

3.20

05

29.0

3.20

05

12.0

4.20

05

26.0

4.20

05

10.0

5.20

05

24.0

5.20

05

NO

3 K

on

zen

tra

tio

n [

mg

/l]

Z Wil Teiche VRM

Ammonia degradation

Nitrate concentration


Conclusion


Requirements to the productmanagers developing membrane technology:

technology as simple as possible

low maintenance

low energy consumption

long lifespan

Adapted technology for application

worldwide, not only in technically advanced

regions.

Combining wastewater lagoons with membrane filtration works !

dep. of sanitary engineering membranelagoon wildberg – upgrading of wastewater lagoons by membrane...

Documents

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