Electrocoagulation and chemical coagulation are treatment methods based on the same removal mechanism.In this study, it was investigated the effectiveness of coagulation methods using Al electrodes and Al2(SO4)3.18H2O on the wastewaters from cardboard production.In the electrocoagulation experiments, the optimum current and pH where the highest COD removal efficiency by 54% was achieved were determined respectively as 10A and 6.62.The study also it was seen that 58%COD removal was reached for the KCl concentration of 0.5 mg/L that was applied.In the chemical coagulation study, the highest removal efficiencies were obtained as 36%, 95% and 97% for respectively COD, color and turbidity.The results show that higher efficiency could be achieved by electrocoagulation as a pre-treatment step. [ABSTRACT FROM AUTHOR]
Abstract: Porous conducting carbon paper has been identified as one of the most suitable materials to be used as an electrode support in a polymer electrolyte membrane fuel cell (PEMFC). Carbon paper was prepared following a combined technique of papermaking followed by composite formation. Samples were prepared with varying thickness while maintaining a uniform composition and a constant density of 0.50g/cc. The effect of the thickness on various properties of carbon paper affecting its performance in the PEM fuel cell and cell efficiency has been discussed. Power density as high as 805mW/cm2 has been achieved for PEM fuel cell employing carbon paper sample with 0.028cm thickness, an increase of more than 55% as compared to 510mW/cm2 for 0.046cm thick sample. [Copyright &y& Elsevier]
The author reflects on the four decades of uninterrupted professional journey on the research and development (R&D) on drying and dewatering. The author states that his R&D activity was driven by the necessity to search for new drying technology for paper. The author mentions the new paper drying technology made by the Pulp and Paper Research Institute of Canada in 1960. The author adds that his research on the multidisciplinary areas of transport processess.