Biomedical subjects

G Kolisch

Publications and source records attributed to G Kolisch.

5 recordsLinked to original sources

PubMed2005

A new approach to improve sludge dewatering using a semi-continuous hydraulic press system.

In future, it will be necessary to incinerate an increasing proportion of the sludge produced by public wastewater treatment. In this context, equipment for more effective dewatering of sewage sludge is required. A hydraulic press system (Bucher HP) which has been used to date in the food industry could represent an alternative to the sludge dewatering systems currently used. The basic suitability of this press system was demonstrated in comprehensive industrial-scale trials at the Glarnerland STP (Switzerland). Dry solids contents of up to 43% were measured in the pressed sludge. Currently, the optimization of individual process parameters is being investigated in a pilot plant at the Schwelm STP operated by Wupperverband (Germany).

Bioreactors↗

PubMed2004

Lamella separators in the upgrading of a large urban sewage treatment plant.

Wupperverband is using lamella separators for the upgrading of its Kohlfurth sewage treatment plant that is currently in progress. The lamellae positioned at the outlet of the biological treatment stage already remove part of the biomass in the activation basin and prevent it from reaching the final clarification stage. This preliminary separation system reduces solids concentration in the biological treatment system without negative impact on final clarification and therefore also lowers the basin capacity needed, with positive effects on costs. This article gives an overview of the separation performance achieved.

Biomass↗

PubMed2002

Model structure identification for wastewater treatment simulation based on computational fluid dynamics.

The objective of this presented project is to use the results of an CFD simulation to automatically, systematically and reliably generate an appropriate model structure for simulation of the biological processes using CSTR activated sludge compartments. Models and dynamic simulation have become important tools for research but also increasingly for the design and optimisation of wastewater treatment plants. Besides the biological models several cases are reported about the application of computational fluid dynamics ICFD) to wastewater treatment plants. One aim of the presented method to derive model structures from CFD results is to exclude the influence of empirical structure selection to the result of dynamic simulations studies of WWTPs. The second application of the approach developed is the analysis of badly performing treatment plants where the suspicion arises that bad flow behaviour such as short cut flows is part of the problem. The method suggested requires as the first step the calculation of fluid dynamics of the biological treatment step at different loading situations by use of 3-dimensional CFD simulation. The result of this information is used to generate a suitable model structure for conventional dynamic simulation of the treatment plant by use of a number of CSTR modules with a pattern of exchange flows between the tanks automatically. The method is explained in detail and the application to the WWTP Wuppertal Buchenhofen is presented.

Algorithms↗

PubMed2002

Measures and costs of integrated river basin management--the Wupper example.

The implementation of the European Water Framework Directive entails additional costs in the areas of management, monitoring and water quality. As a first estimate, an attempt is made to assess the effects of implementation on the development of costs in a sub-basin, taking the Wupperverband as an example. The work and measures required are presented and the costs are assessed. On this basis, a cost estimate for the maximum time required for the implementation of the WFD is made. This takes into account all the relevant tasks in the area of the association with respect to rivers.

Costs and Cost Analysis↗

PubMed2001

Provision of data for on-line simulation.

A crucial factor for the quality and results of the on-line simulation of a municipal sewage treatment system is the provision of the requisite data in adequate quality and density. Since the measured data cannot be incorporated in a simulation model without prior processing, it should be prepared in such a way that it can be converted to the model-related input quantities. If individual input measuring signals fail, substitute value concepts must be developed which are based on the remaining information. With this it is possible to ensure the continuous provision of data. Various approaches are possible in seeking a solution to this problem. At the Wupperverband a detailed programme of investigation on the subject area of the processing of inflow data is being implemented as a component of future on-line simulation at Wuppertal-Buchenhofen STP.

Chemical Fractionation↗