This work seeks to contribute the study of techniques for level control considering a nonlinear plant model. To achieve this goal, different approaches are applied classical and their results analyzed. Fuzzy Logic Control (FLC), Artificial Neural Network (ANN), Adaptive Neuro-Fuzzy Inference System (ANFIS), Model Predictive (MPC) Nonlinear Auto-Regressive Moving Average (NARMA-L2) controllers d...

In our center where a lot of water is used for watering and cleaning the classrooms, management wastewater as resource can be real opportunity. The main objective this research to size determine effectiveness natural treatments treatment system composed septic tank plant which would installed in site Ngoundiane Alioune DiOP University, Bambey, Senegal. Overall, we noted that sized dimensioned s...

Understanding the annual cycle of Microcystis is essential for managing the blooms of this toxic cyanobacterium. The current work investigated the sedimentation of microcystin-producing Microcystis spp. in three reservoirs from Central Spain during the summer and autumn of 2006 and 2007. We confirmed remarkable settling fluxes during and after blooms ranging 10(6)-10(9) cells m(-2) d(-1), which...

We present the results of a combined experimental and theoretical investigation of sedimentation in a stratified fluid. The theory of sedimentation in a homogeneous ambient is extended to include the influence of a spatially varying particle settling speed. The results of an experimental investigation of latex particles settling in a stably stratified salt water solution are reported. Density v...

a mathematical method for calculation of the minimum cross-sectional area of a thickener is presented by obtaining minimum laboratory batch settling test data, a function, which is called settling function, is derived. this function is found to be in the form of a polynomial of third order. the settling function and mass flux relation are used for the design of thickener. the method predicts th...

Abstract To deal with issues of process sustainability, cost, and efficiency, we developed materials reengineered from fibers to serve as super-bridging agents, adsorbents, ballast media. These sustainable fiber-based considerably increased the floc size (~6,630 µm) compared conventional physicochemical treatment using a coagulant flocculant (~520 µm). The also reduced usage (up 40%) 60%). coul...

Dust grain growth and settling time inside initial gaseous giant protoplanets in the mass range 0.3 to 5 Jovian masses, formed by gravitational instability, have been investigated. We have determined the distribution of thermodynamic and physical variables inside the protoplanets solving the structure equations assuming their gas blobs to be fully convective and with this distribution we have c...

In this contribution, a new approach for teaching digital controllers for finite settling time and deadbeat response is proposed. Essential concepts of deadbeat control are revised and shorted in order to simplify the teaching. The approach is base on a constructivist instructional model, which is supported by wellknown pedagogical tools as the learning cycle, the sandwich structure and the por...

New data on the settling velocity of artificial sediments and natural sands at high concentrations are presented. The data are compared with a widely used semiempirical Richardson and Zaki equation (Trans. Inst. Chem. Eng. 32 (1954) 35), which gives an accurate measure of the reduction in velocity as a function of concentration and an experimentally determined empirical power n. Here, a simple ...

A numerical scheme is proposed for the simulation of reactive settling in sequencing batch reactors (SBRs) wastewater treatment plants. Reactive process sedimentation flocculated particles (biomass; activated sludge) consisting several material components that react with substrates dissolved fluid. An SBR operated cycles consecutive fill, react, settle, draw and idle stages, which means volume ...