Kein Folientitel

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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
Dep. of Sanitary Engineering
2
Problem in arid and semiarid regions
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Agricultural irrigation
Drinking water supply
Need for waste water reuse
Problem in temperate climates
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Reduction of surface water quality due to loading
by effluent of overloaded treatment plants
Need for improving effluent quality
Research Background
Dipl. Geogr. Katharina Teschner
METU 10.06.2005
Dep. of Sanitary Engineering
3

• Wastewater lagoons are applied worldwide
• easy to construct
• easy to operate and maintain
• low investment and running costs

Types

• Sedimentation lagoons
• Naturally aerated lagoons
• Artificially aerated lagoons
• Polishing lagoons

• 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.

Decentralised Wastewater Treatment
Dipl. Geogr. Katharina Teschner
METU 10.06.2005
Dep. of Sanitary Engineering
4
Huber VRM membrane unit

• 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

membrane module
Decentralised Wastewater Treatment
Dipl. Geogr. Katharina Teschner
METU 10.06.2005
Dep. of Sanitary Engineering
5

• solid/liquid seperation
• effluent free from pathogenic microorganisms
• high-quality polymer membranes
• pore width 38 nm
• semi cross flow system
• permeation vacuum pressure (lt200 mbar)

HUBER VRM
Dipl. Geogr. Katharina Teschner
METU 10.06.2005
Dep. of Sanitary Engineering
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Adoption of membrane technology to wastewater
lagoons
Transfer of simple wastewater lagoons to
membranelagoons
Combined lagoon-membrane system
Dipl. Geogr. Katharina Teschner
METU 10.06.2005
Dep. of Sanitary Engineering
7
Advantages
smaller volume (less than 1 m³/inh. instead of 10
m³/inh.)
considerable increase of biomass in the lagoon
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
Combined lagoon-membrane system
Dipl. Geogr. Katharina Teschner
METU 10.06.2005
Dep. of Sanitary Engineering
8
Pilotplant Wildberg

• municipal wastewater
• seperated sewer system
• desigend for 900 inhabitants
• 700 inhabitants connected

polishing lagoon
clarifying lagoon
efffluent
surface water
aerated lagoon 2
aerated lagoon 1
screen
VRM
permeate
influent
TP Wildberg
Dipl. Geogr. Katharina Teschner
METU 10.06.2005
Dep. of Sanitary Engineering
9
Aerated lagoons
TP Wildberg
Dipl. Geogr. Katharina Teschner
METU 10.06.2005
Dep. of Sanitary Engineering
10
Clarifying lagoon
Polishing lagoon
TP Wildberg
Dipl. Geogr. Katharina Teschner
METU 10.06.2005
Dep. of Sanitary Engineering
11
Pilotplant Wildberg

• Membraneplates 60
• Membranesurface 45 m²
• Membranematerial PES
• Turnings 2/min.
• Flux (gros) ? 30 l/(m²h)
• Transmembranepressure ? 300 mbar
• Cross-Flow 50 m³/h
• Aeration 16 m³/h
• Volume 4,5 m³

HUBER VRM 20/15
TP Wildberg
Dipl. Geogr. Katharina Teschner
METU 10.06.2005
Dep. of Sanitary Engineering
12
Pilotplant Wildberg
1-1,5 g/l
DS concentration
up to 15 g/l
TP Wildberg
Dipl. Geogr. Katharina Teschner
METU 10.06.2005
Dep. of Sanitary Engineering
13
Pilotplant Wildberg
TP Wildberg
Dipl. Geogr. Katharina Teschner
METU 10.06.2005
Dep. of Sanitary Engineering
14
Transmembranepressure/ Flow
bad operation conditions
good operation conditions
TP Wildberg
Dipl. Geogr. Katharina Teschner
METU 10.06.2005
Dep. of Sanitary Engineering
15
COD degradation
BOD5 degradation
TP Wildberg
Dipl. Geogr. Katharina Teschner
METU 10.06.2005
Dep. of Sanitary Engineering
16
Ammonia degradation
Nitrate concentration
TP Wildberg
Dipl. Geogr. Katharina Teschner
METU 10.06.2005
Dep. of Sanitary Engineering
17
Combining wastewater lagoons with membrane
filtration works !
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.
Conclusion
Dipl. Geogr. Katharina Teschner
METU 10.06.2005
Dep. of Sanitary Engineering