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

Chair of Sanitary Engineering and Water Recycling
The sewage system consisting of a trickling filter treatment
plant (ca. 130.000 PT), the sewage draining system,
i.e. sewage transport network and storm water
treatment facilities, is fed with municipal and industrial
waste water (the latter mainly indirectly discharged by
a paper mill). To meet the challenges of project the
following steps have to be accomplished:
• collection and analysis of data and samples from
the waste water treatment plant, especially evaluation
of the operational journals and the continuous
online-measurement data of the biological
treatment stage (trickling filter)
• collection of meteorological data
• set-up of the online measurement (e.g. COD,
NH 4+
, NO 3-
)
• extensive collection and analysis of data and
samples from the indirect discharger (paper mill),
e.g. basic waste water flows and waste water quality
dependent on various conditions like paper
grade or internal process impacts)
• analysis of the existing sewage network, e.g. surveying
hydraulic conditions of the sewers and respective
facilities
• calculation of relevant sewage network flow times,
utilisation ratios of sewers, hydrostatic water levels
and flows under dry weather and storm weather
conditions
• design, calibration and verification of an integrated
dynamic simulation model
• installation of structural measures concerning the
control facilities of the storm water treatment, the
indirect discharger and the sewage network
• application of the simulation model and coupling
with the online measurement and control facilities
With the help of these measures the municipal waste
water treament plant is likely to continuous operation
in optimal range. The risk of concentration and dirt
load peaks polluting receiving waters is avoided or minimised.
By a sophisticated discharge control of the
industrial waste water point sources and the control
of the sewage system facilities based on the continuous
model and online measurement information on
the free storage capacity of the sewage network and
storm water treatment facilities in dependence on the
present hydraulic situation (dry weather flow, storm
weather flow) as well as on the current state of the
municipal waste water treatment plant, an optimal
quantitative and qualitative (head parameter = chemical
oxygen demand [COD]) feed to the treatment
plant is achieved. Thus, long-term an improvement of
the water quality without the necessity of expensive
new investments in advanced treatment stages can be
expected.
Financing Institution:
Ministry for the environment Baden-Württemberg
Project Partner:
University of Stuttgart, Germany
City of Heidenheim
Voith Paper Technology Center (Heidenheim)
Contact:
Dipl.-Ing. Ralf Minke, AOR
Dipl.-Ing. C. Meyer
Dipl.-Ing. S. Schmidt
NASSY: laboratories and holiday camps for female
pupils
The project „Nassy: laboratories and holiday camps for
female pupils“, has been put out for tender as a part of
the project “researching pupils – insights into sciences
and engineering” by the ministry for sciences, research
and arts and has been benefitted for 18 months. The
research centre for water in Stuttgart (wfz) under the
aegis of the organization VEGAS has applied for the
project which is run by three chairs of the institutes for
water engineering (IWS and ISWA).
The aim of Nassy is to acquaint female pupils from
primary and secondary school with physical issues,
sciences and engineering by the medium water. The
variety of topics based on water is large and has the
advantage, that the pupils can associate their own
everyday experiences.
The Nassy-courses shall inspire the pupils to get interested
in a scientific or engineering occupation. This
can be realized through the inductive practices of working
out the scientific laws on the basis of exciting experiments
and excursions as well as through the exemplary
function of experienced female engineers.
The project includes the three components:
1. experimental afternoons
2. holiday camps
3. information about study and employment
The three technical contents of the components 1 and
2 were developed by the three chairs of the two institutes
and are offered in three thematic modules:
Module I:
drinking water production and groundwater,
Module II:
wastewater treatment and drinking water purification,
Module III:
surface water and hydropower.
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