Stirred tank reactors are frequently used for mixing as well heat- and mass transfer processes in chemical biochemical engineering due to their robust operation extensive experiences the past. However, cell culture like mammalian expression systems, special requirements have be met ensure optimal growth product quality. One of most important ideal transport is a proper performance, characterize...

Introduction Mixing in stirred tanks is driven by the impeller-generated convective motion at larger scales, by turbulent transfer at smaller scales and diffusion at molecular scales. Smith reported that the lack of a fundamental understanding of the processes in stirred vessels leads to losses in the order of US$10 billion per year due to non-optimal energy utilisation. Thus, there is a need t...

This study combines a two-phase biological treatment system of activated sludge/contact aeration process by adding biological contact filters into the rear sector of the activated sludge aeration tank of the slaughterhouse wastewater treatment plant. This system keeps the advantages of complete mixing of substrates and microorganisms and flexible operation of the activated sludge process, and i...

The objective of this study was to compare FirstAct with several tank mix partners for efficacy in herbicide-tolerant grain sorghum. (quizalofop) alone or mixtures controlled Johnsongrass 94% more. However, mixing any broadleaf herbicide generally antagonistic Palmer amaranth control. Minor sorghum injury 5% less by four weeks after postemergence treatment. Sorghum yields increased all treatmen...

This article focuses on designing and analyzing a new method for mixing in process vessels. We propose using an air bubble curtain to accomplish the desired mixing. The used this study is made of empty pipe with several holes through which pumped, turn produces swarm bubbles that causes pseudo-turbulent tank filled liquid solution. A uniform distribution within was assured by maintaining see-sa...

Abstract In this article, the side-entry agitator commonly used in wet desulfurization absorption tower of a 300 MW thermal power unit was taken as research object, and gas–liquid two-phase flow field stirring tank numerically simulated by using two-fluid model based on Euler–Euler method. The vertical horizontal velocity distribution gas phase were studied. results showed that formed “fountain...

In this paper, the study of the dynamics and control of a semibatch wastewater neutralization process in modeling and simulation is presented. The wastewater neutralization process is modeled based on the reaction between a strong basic solution and a strong acidic solution in a semibatch reactor. It is assumed that the wastewater is acidic in nature. The semibatch system chosen here consists o...