The pilot-scale study on a sludge recycling enhanced coagulation–ultrafiltration (UF) process for surface water treatment is investigated in this paper. The impact of the sludge recycling ratio and coagulation stirring strategy on removal, sedimentation efficiency, and membrane fouling control was studied in this work. Sludge recycling ratios of 0%, 5%, 10%, 15%, and 20% were applied, and the o...

Lipase production by a Brazilian wild strain of Yarrowia lipolytica at different stirring speeds and air flow rates was studied. The relationship among lipid consumption, cell growth and lipase production by this microorganism is presented. The most pronounced effect of oxygen on lipase production was determined by stirring speed. Maximum lipase activity was detected in the late stationary phas...

The laws of chemical reaction kinetics are seen that constant stirring produces the customarily used for recombination kinetics, classical result, the effects of partial This implies time—independent rate constants stirring are not yet clear, since partial (K). For instance, for the triplet exciton stirring is characterized, in part, by diffusion fusion process A + A + A 2 , leading to delayed ...

Introduction. Since Helminiak et al.' and Takayanagi2 first proposed the concept of a molecular composite, considerable remarch has been directed a t developing these materiale.3 Conceptually, molecular compitea are mixtures of a rigid rod polymer homogeneously dispersed in a flexible coil polymer matrix, thus providing fiber reinforcement at a molecular level. In practice, however, miscible bl...

This paper presents an attempt to optimize fluidized bed drying of wet and adhesive particles (with an initial diameter of about 580 mm) with the use of stirring, and discusses the influence of stirring on the total drying time. The goal was to demonstrate the positive effect of stirring a fluidized bed to the drying time, to find the optimal parameters (stirrer design, speed, and size). Experi...

This work describes the definition, application and assessment of a factorial plan with the aim of gaining insight on what kind of stirring strategy could work the best in a vibrating intrinsic reverberation chamber. Three different stirring strategies were defined as factors of a factorial plan. We assess the overall reverberation performance according to three different indicators. With the h...