Institute for Sanitary Engineering, Water Quality and Solid Waste ...

Industrial Water and Wastewater Technology IWT
household waste is prohibited by law since 2005. The
old landfills still need a long and expensive maintenance
up to 50 years. Nowadays waste incineration
plants, composting plants, recycling facilities and mechanical-biological
waste treatment (MBT) plants are
state of the art.
The big advantage of MBT plants is the low energy
consumption for the operation, low emissions of green
house gases and a high energy recovery. Even the invest
costs are relatively low, compared the waste incineration
plants. Also the rate of return is very high,
as MBT plant can produce valuable refuse derived fuel
(RDF) and biogas. The biogas can be used to produce
electrical energy and heat by using combined heat and
power plant (CHP) or modern gas turbines.
As boundary conditions differs from country to country
and especially between developed and developing/
newly industrialized countries the in Germany well approved
MBT technology can not be used for waste of
other countries one-to-one. One of the biggest differences
in the waste composition is the higher organic
as well as the higher water content. Beside that the
climate and the weather can have a big influence on
the performance.
The University of Stuttgart, in cooperation with the
German company WEHRLE Umwelt GmbH, Emmendingen
is working on the development of a new MBT
technology. This technology is based on a well approved
German technology, which is positively field-tested
and successfully in use at the site Kahlenberg,
Ringsheim for more then 5 years. The main task of the
development is the adaption of the technology to other
boundary conditions. Hence, the University of Stuttgart
planed and installed a MBT pilot in central Thailand
in the province Petchaburi. During the operation the
suitability is going to be tested. The local Thai company
Cemtech Co. Ltd. and the „King Mongkut‘s Institute
of Technology Ladkrabang” (KMITL) are supporting the
project.
The advantages by using the planed MBT-technology
for the waste disposal are:
• Very low impacts on the local and global environment
(globing warming)
• Relatively low investment costs
• High rate of return
• Clean Development Mechanism (CDM) à Selling of
carbon credits
• Low tipping fees for the population
• Production of CO 2 -neutral and valuable RDF
• Production of CO 2 -neutral biogas
Financing institution:
Umweltministerium Baden-Württemberg
Financing program:
Betriebliche Umwelttechnik
Project Partner:
WEHRLE Umwelt GmbH, Emmendingen
Contact Persons:
Prof. Dr.-Ing. Uwe Menzel
M.Sc. Dipl.-Ing. Sebastian Platz
Development of a process to produce bioplastic
on municipal wastewater treatment plants
The ambition of this research project is to find an economic,
effective process to pro-duce bioplastic out of
waste water. The state of the art of the bioplastic production
is the basic idea of this project. Wastewater as
raw material for the bioplastic production has not been
an object of research so far and offers the opportunity
to transform the waste water treatment plant into a
bioplastic factory. Today, plastic is made out of unlasting
crude oil. So it is obvious, that the production of
bioplastic includes some benefits and fits to the main
idea of sustainability. Bioplastic, for example, enables
preservation of resources, is compostable and biodegradable.
Financing institution:
Willy Hager Stiftung
Contact Persons:
Prof. Dr.-Ing. Uwe Menzel
Dipl.-Ing. Timo Pittmann
Assessment of the water treatment facilities of
the steel work of the ThyssenKrupp Steel AG in
the federal state Rio de Janeiro / Brazil
ThyssenKrupp belongs to one the biggest enterprises
from the technology group worldwide. More then
190,000 employees are working in main sectors steel,
industry goods and services. The company had a turnover
of more then 51 billion Euro in the business year
2006/2007.
Around 20 percent of the turnover is realised by the
ThyssenKrupp Steel AG. The ThyssenKrupp CSA is a
sub company of the ThyssenKrupp Steel AG.
The ThyssenKrupp CSA Companhia Siderurgica currently
builds one of the biggest steel works worldwide
in the Sepetiba bay in the federal state of Rio de Janeiro
in Brazil. This will be done in order to increase the
worldwide steel production of the ThyssenKrupp Steel
AG. The investment of the project is estimated with
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