By J. K. Edzwald, D. J. Pernitsky, W. L. Parmenter (auth.), Prof. Hermann H. Hahn Ph. D., Erhard Hoffmann, Prof. Hallvard Ødegaard (eds.)
For the 9th Gothenburg Symposium time layout and operation engineers in addition to supervising and investment directors in chemical water and waste water therapy, have come jointly to interchange rules, reviews and private perspectives on problems with water and waste water administration. whereas the most thrust of previous symposia was once within the description of the technology of current chemical unit-operations in water know-how this 9th symposium focuses additionally on facets of total power and mass flux analyses, the try for progressively more sustainable strategies (not basically in technological turns) and public deepest partnership in all parts of water administration. because the symposium in its attempt to handle additionally assorted geographical parts and for this reason assorted water difficulties moved to Istanbul in Turkey a unique attempt was once made in constructing a platform for commercial water management.
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Extra resources for Chemical Water and Wastewater Treatment VI: Proceedings of the 9th Gothenburg Symposium 2000, October 02-04, 2000, Istanbul, Turkey
40 6 _ _6 _ _6 .!!! ro2~~ 3 --~ 4 --~5~~6~~--~ 8 --~ 9~10 pH Fig. 8. 6 Coagulant dosage (mYI) Fig. 9. Comparison of turbidity removal efficiency of PFSS, Fe,(SO,), and PSA In Figure 8, the curves relating zeta potential to pH demonstrate that PFSS coagulant is an excellent turbidity remover from kaolin suspensions, even when the f10cs formed during coagulation/flocculation are charged by relatively more negative electrons. This means that PFSS may be more effective in the aspect of bridge-formation.
In the digester (retention time 20 days) 50 % of the organic fraction of the primary sludge and 30 % of the secondary sludge were degraded. The energy value of the biogas was 22,000 kJ/m', of which 32 % was converted to electricity in the TE-installation. e. heat) was used for sludge heating. After digestion the final sludge was dewatered by centrifugation to 25 % dry solids. 5 kg polymer per ton dry solids was dosed. The dewatered sludge was transported for central incineration and stored as chemical waste.
The settling time could be reduced from 900 s to 300 s without a decrease in turbidity removal (result not shown). The Replacement of Metal Salts with Cationic Organic Polymers - Scenario Study A scenario study was carried out in order to study how replacing FeCI, with cationic organic polymers affects the costs and environmental impacts of a complete wastewater treatment system. With the information derived from the experiments, two scenarios based on coagulation-flocculation (with cationic polymer and with Fe'+) were set up in the evaluation programme DEMAS.
Chemical Water and Wastewater Treatment VI: Proceedings of the 9th Gothenburg Symposium 2000, October 02-04, 2000, Istanbul, Turkey by J. K. Edzwald, D. J. Pernitsky, W. L. Parmenter (auth.), Prof. Hermann H. Hahn Ph. D., Erhard Hoffmann, Prof. Hallvard Ødegaard (eds.)