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

Dep. of Sanitary Engineering Research Background Dipl. Geogr. Katharina Teschner METU 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

Dep. of Sanitary Engineering Decentralised Wastewater Treatment Dipl. Geogr. Katharina Teschner METU 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:

Dep. of Sanitary Engineering Decentralised Wastewater Treatment Dipl. Geogr. Katharina Teschner METU 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 inhabitants started operation in 2004

Dep. of Sanitary Engineering HUBER VRM Dipl. Geogr. Katharina Teschner METU  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)

Dep. of Sanitary Engineering Combined lagoon-membrane system Dipl. Geogr. Katharina Teschner METU Adoption of membrane technology to wastewater lagoons Transfer of simple wastewater lagoons to membranelagoons

Dep. of Sanitary Engineering Combined lagoon-membrane system Dipl. Geogr. Katharina Teschner METU 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

Dep. of Sanitary Engineering TP Wildberg Dipl. Geogr. Katharina Teschner METU aerated lagoon 1 aerated lagoon 2 screenVRM  municipal wastewater  seperated sewer system  desigend for 900 inhabitants  700 inhabitants connected influent efffluent permeate surface water polishing lagoon clarifying lagoon Pilotplant Wildberg

Dep. of Sanitary Engineering TP Wildberg Dipl. Geogr. Katharina Teschner METU Aerated lagoons

Dep. of Sanitary Engineering TP Wildberg Dipl. Geogr. Katharina Teschner METU Clarifying lagoon Polishing lagoon

Dep. of Sanitary Engineering TP Wildberg Dipl. Geogr. Katharina Teschner METU 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-Flow50 m³/h  Aeration 16 m³/h  Volume 4,5 m³

Dep. of Sanitary Engineering TP Wildberg Dipl. Geogr. Katharina Teschner METU Pilotplant Wildberg DS concentration 1-1,5 g/l up to 15 g/l

Dep. of Sanitary Engineering TP Wildberg Dipl. Geogr. Katharina Teschner METU Pilotplant Wildberg

Dep. of Sanitary Engineering TP Wildberg Dipl. Geogr. Katharina Teschner METU Transmembranepressure/ Flow bad operation conditions good operation conditions

Dep. of Sanitary Engineering TP Wildberg Dipl. Geogr. Katharina Teschner METU COD degradation BOD 5 degradation

Dep. of Sanitary Engineering TP Wildberg Dipl. Geogr. Katharina Teschner METU Ammonia degradation Nitrate concentration

Dep. of Sanitary Engineering Conclusion Dipl. Geogr. Katharina Teschner METU 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 !