The labs support the research and teaching requirements of the institutes and the department. The equipment and staff is partly financed by the University, partly by the Institutes third party financing capacity.
The following laboratories – equipped with the listed instruments - are maintained in the Institute:
Chemical analytical lab
- Total Organic Carbon (with UV chemical oxidation and catalytic combustion)
- Organic Halogens (AOX/POX/EOX )
- Gaschromatography (GC-MSD, GC-FID, GC-ECD, with Headspace and Liquid-Autosampler)
- High Pressure Liquid Chromatography ( with DAD and Fluorescence detection)
- Inductively Coupled Plasma Mass Spectrometry (ICP-MS)
- Ion Chromatography (IC with conductivity detection and Autosampler)
- UV / VIS Spectrometer (several instruments for measuring in the range 200-800nm)
- Particle counting and measurement, Turbidity measurement
- Techniques for on-line-measurements (pH, redox, conductivity, etc.)
- BOD and COD measurement
- culture-based drinking water microbiology, enumeration, identification and characertisation
Axioplan 2 (Zeiss) + digital image analysis system (AxioCam MRc camera, Zeiss)
Dialux 22 (Leitz)
Type 102 (Nikon)
- Flowcytometer Cube 6
- regrowth potential assessment of bacteria
- biofilm characterisation
TECHNICAL LABORATORY HALL
at the SIG
We want to give scientific and technical assistance for industry and trade in the development of sewage and clean water processing techniques. The technical laboratory (Technikum) at the SIG ensures with all its equipment an excellent possibility for investigations and research with all kinds of water. This room is fit for experiments with clean water and all kinds of wastewater (e.g. industrial).
It is possible to operate small-scale pilot-systems up to nearly 1:1 scale-systems due to the advantageously dimensions (length 30m, width 7m, height 10,5 m) of the technical laboratory. There are mounted on the ceiling two cranes (3 tons each), which allow a free handle of the used parts for the investigations, and the huge entry (6 m * 6 m) to the technical laboratory from the street ensures an easy access for trucks and sewage tank cars. If necessary or required, it is no problem to operate and supervise pilot plants owned by project partners in this technical laboratory.
A big effort was focussed on the layout of this room to ensure a maximum flexibility and a modern and forward-looking experimental operation. The observation of all operational sequences in the technical laboratory is done by a control task program (SPS) which is able to observe all technical equipment important for operation (visualization, counting, measuring, positioning, controlling, data archiving).
A new comfortable field in supervising pilot plants is a software called LABVIEW©. It is a very powerful program for storing and evaluating data and controlling the test mode during operation. This kind of control system is of course ready for an outdoor use.
Following water qualities and other supports are available in the technical laboratory:
• Permanent fresh domestic wastewater directly from of a sewer via a pumping station (the sewer is close to the building).
• One storage tank for domestic wastewater (1.5 m3) and two storage tanks (each 6 m3) for other water qualities. An external mixing with a powerful pump ensures no settling of material.
• The exact supply with water for the pilot plants is done by a discharge station equipped with hose squeezing valves controlled by flow meters.
• Tap water supply at many outlets.
• Groundwater from a nearby riverbank collected by a filter well.
• Supply with natural gas, compressed air and a connection to an in-house refrigerating machine.
• Connections to our computer network and many electrical switchboxes (230 V and 400 V).
• Tanks of many sizes, air compressor, pumps, peristaltic pumps, stirrer, …
All effluents from the pilot plants located at the technical laboratory are colleted in a huge storage and buffer tank which can be treated with acid and lye if necessary. Afterwards it is pumped directly to the sewer.
Permanent in use: wastewater treatment plant (Sequencing batch reactor – SBR), filter-columns, constructed wetland pilot plants
New pilot plants and/or adaptations on existing systems outside the technical laboratory can be done quickly by colleagues of our workshop (equipped to process metal, plastic and wood). They are supported by qualified staff for installing electronic units. For an accompanying computer simulation and evaluation of the tests done in the technical laboratory l powerful PC-Systems are ready in our office. Nevertheless, we have also much experience to work outdoor with our well adjusted equipment.
Figures: Overview of the technical laboratory