Dear Colleagues,

Welcome on the web page of the IWA Specialised Conference on Design, Operation and Economics of “Large Wastewater Treatment Plants”. This conference is the 12th conference in series when the first one was organized already in 1971 in Vienna. The 2015 Conference is the 3rd one being organised in Prague and the Czech Water Association as a national member of IWA is very glad and proud to be a host of this prestigious conference after 12 long years. The world has changed dramatically during those last years, the number of people involved in the LWWTP topics increased significantly and also the amount of information available multiplied several times. There are many new sources of information, not only internet with professional web pages and with wonderful literature searching machines, but also digital journals and books, videoconferences, networking on social nets, etc., etc. This development has created a very strong competition for traditional conferences where people have to travel, very often long trips, to the conference venue, pay the registration fees, pay for more and more expensive hotels, and mainly stay out of the office for several days. In spite of all this drawbacks we are inviting you for a traditional conference where you can listen to live speeches and discuss with your colleagues personally, not only on the screen of your computer. Why? Why we expect you will come to Prague? Because we still believe in two strong advantages of traditional conferences:

  1. Effectiveness of information exchange – the listening and discussion to the authors is still the most rapid and effective way of information exchange when you can be involved in discussion groups of several people and formulate your ideas in interactions with others.

  2. Social dimension of the conference. The conference visitors can meet and talk with old friends in a friendly atmosphere during the breaks or conference evenings. The new members of the LWWTP community can make very useful contacts for their future career at the conference. Well, you can have some nice chat also on internet but you cannot enjoy the glass of excellent Czech beer with your partner in this way.

You can find in this web page some photographs from the last LWWTP conference in Prague in 2003. They document the creative but at the same time very relaxed atmosphere of the conference. We are convinced that we would be able to create again such a friendly environment for you and that few days spent at the conference will be for you a kind of relaxation in your busy everyday life. In this effort we will have one strong supporter, namely, the City of Prague. Prague is one of the most beautiful towns of the world (believe me, I am a native of Prague). Prague is known for its historical monuments including the masterpieces of gothic or baroque architecture as well as for its cosy pubs where you can enjoy fabulous Czech beer and unhealthy but very tasty Czech cuisine.

Let me hope on behalf of the conference organisers that the advantages of our traditional conference will outweigh the discomfort of travelling to Prague. Welcome to Prague in September 2015!

Prof Jiri Wanner




There are at least 3 reasons for accepting the invitation to the LWWTP conference in Prague in September 2015:

  • On a global scale, the number of large WWTP and new processes has markedly increased and will further increase during coming decades. This is a great challenge for the consultants, decision maker and economists to find the best solution for a specific location and new effluent standards for reuse and discharge.
  • The managers and operators of LWWTP are increasingly coming under pressure to minimize cost and energy consumption. At the same time automation, sensor technology and remote control are in rapid progress.
  • The opportunity to have face to face meetings with all the leading persons in this growing field of expertise allows enlarging the personal networks around the globe and the YWPs to learn for their future career. All this will happen in a very attractive environment in a city full of historic heritage and modern development in the centre of Europe.

The organizers and IWA hope to see you at the conference in Prague.

Helmut Kroiss
IWA president



I’m very happy and pleased to be invited and to encourage the water specialists to participate to 12th IWA Specialised Conference on Design, Operation and Economics of Large Wastewater Treatment Plants, 2015 to be held in Prague, Czech Republic, as an IWA Specialist Groups event.

This event is addressed to the community of professionals, academia and practitioners and offers a good opportunity to exchange theoretical and practical issues within the Conference sessions, workshops and to visit old and modern assets in Prague and Pilsen, representatives for the waste water sector in the Region.

This Conference continues the IWA activities into the region, according with the Strategic Plan 2014-2018: connecting peoples, pioneering science, innovating technology and leading practice. 

The Conference location in Prague, as a third edition of LWWTP, within a series of 13 Conferences on this topic, shows us that the subject is important and specialists from the Central Europe and not only, is focussing on it.

Czech Republic is a good example of how to efficiently and effectively spend U.E. Funds in the water infrastructure and I’m sure that the meetings will be intensive and the debates active.

We are looking forward to meeting participants from around world, but I hope that Central and Eastern Europe will be well represented and this event will be a good opportunity to increase and to consolidate the relationship between IWA members from this part of Europe and prove that the IWA mission confirms the ambition to change the future of water.

Dr.-Eng. Florin Iliescu
IWA Director for Central and Eastern Europe



Welcome to Prague


Conference Secretariat: C-IN, 5. kvetna 65, 140 21 Prague 4, CZE | tel.: +420 261 174 301 | fax: +420 261 174 307
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