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Microbial fuel cell (MFC) is a promising technology that uses bacteria to produce electricity through chemical reactions. While MFC is highly efficient, environment-friendly, and independent from limited sources, control-oriented modeling and control studies that aim to improve the power output have been limited. In this paper a control-oriented dynamic model with state-space representation is presented...
Wastewater is treated in wastewater treatment plants (WWTP) through various physical, biological and chemical methods. A good control of WWTP processes could lead to better water quality and to an efficient use of energy. In order to control the treatment process all parameters need to be known. Some of them cannot be measured, so an estimate of the unknown parameters has to be used. This paper proposes...
This paper deals with the possibility to control the biosynthesis processes using information about microorganisms mean age. The mean age is a very important parameter characteristic to every species and is tightly linked to the mechanism of producing biosynthesis products. The basic idea in controlling the biosynthesis processes using microorganisms mean age information is to bring the most microorganisms...
Anaerobic digestion is a wastewater treatment process where bacteria degrade an organic substrate and produce methane, which can be used as a biofuel. The first task when starting up an anaerobic digester is the increase of its microbial population. It is a delicate phase, which is still not well understood, and its influence on the digester's future performance is not well known. During this phase,...
The anaerobic digestion is a wastewater treatment process without oxygen. It is a very complex process with a nonlinear model of six variables. This model is complex for state estimation and automatic control. We propose a nonlinear equivalent model but for which the theories developed for the linear case can be applied easily using the LMI tools.
The biosorption of reactive red on acid-treated Penicilium sp. was investigated in a packed-bed column. The column experiments were conducted to study the effect of operating parameters such as initial dye concentration, adsorbent dose and flow rate on the column removal capacity. The Thomas model was used to analyze the experimental data. Column experiments showed that the fungal mycelia mixed with...
The present study was undertaken to evaluate the feasibility of Pseudomonas alcaligenes biomass for the removal of strontium ions from aqueous solutions. Batch experiments were performed to study the adsorption of strontium on pH, Pseudomonas alcaligenes biomass adsorbent with respect to initial Sr(II) concentration, contact time and biomass dose. The experimental data were modeled by Langmuir and...
In dealing with the problem that the important parameters of a penicillin fermentation process are hard to measure precisely, such as biomass concentration and production concentration, therefore, a soft sensor modeling for the penicillin fermentation based on fuzzy c-means clustering and least square support vector machine (LS-SVM) is proposed. First of all, features of sample data are extracted...
Biological wastewater treatment reactor are designed to reduce the pollutant content of a wastewater to an acceptable level often fixed by wastewater discharge regulations. The reactor design is often based on average wastewater flow and composition patterns. However, industrial wastewater treatment reactors are often subject to unexpected perturbations (variations in wastewater flow, composition...
Overflow metabolism characterizes cells strains that are likely to produce inhibiting metabolites resulting from an excess of substrate feeding and a saturated respiratory capacity. The critical substrate level separating the two different metabolic pathways is generally not well defined. This occurs for instance in Escherichia coli cultures with aerobic acetate formation. This paper considers the...
A new two-step microphytobenthos biomass mapping approach has been developed and applied to HySpex airborne images of an intertidal mudflat (Bourgneuf Bay, French Atlantic coast). The final aim was to discriminate microphytobenthic biofilms, formed on the sediment surface during diurnal low tide, and to estimate their biomass (mg Chl a .m-2). The approach was, first, tested on laboratory HySpex image...
Biosorption of organic pollutants, expressed as COD, by aerobic and anaerobic sludge was conducted to examine equilibrium and kinetic models. Freundlich and Langmuir models were mostly used for mathematical description of the biosorption equilibrium. Freundlich equation was more fit to describe the equilibrium of biosorption process in this study. Under the same experimental condition, biosorptive...
Trichloroethene (TCE), usually in the form of dense non-aqueous phase liquid (DNAPL), is a widely used degreasing ingredient causing profound soil and groundwater contamination. While bio-enhanced dechlorination of TCE to harmless Ethene is a promising technique for waste water treatment, the mechanism and related phenomenon have not been thoroughly understood, especially in groundwater. A comprehensive...
The optical properties of a laboratory simulated microphytobenthic biofilm were calculated by using the reflectance measurements. The biofilm was simulated as a mixture of a concentrated E.Paludosa culture (38000000 psi.mL-1) and agar1. The classical radiative transfer formulas are used in the case of a multilayer model in order to calculate the proper spectral characteristics of the biofilm in the...
A biomanipulation method, culture of Hyriopsis Cumingii is applied in Xikeng reservoir, Shenzhen, China, to resolve the eutrophication problem of the reservoir. The experiment had been carried out from April, 2001 to March, 2004. In order to simulate the effect of biomanipulation on eutrophication, in this paper a numerical model of biomanipulation in shallow water body (lakes, reservoirs) is proposed...
In this paper, the nonlinear stochastic dynamical system of batch fermentation is investigated in the process of glycerol bio-dissimilation to 1,3-propanediol by klebsiella pneumoniae. Both the patterns of microbial growth and metabolism and formation of fermentation products are strongly effected by bioreactor conditions and fermentation control. Bioreactor conditions and some operations in culture...
A two-dimensional coupled hydrodynamic-ecosystem model is developed to simulate biological processes in Bohai Bay. The biological sub-model describes the carbon cycles through the microbial loop with eight state variables: phytoplankton, zooplankton, bacterioplankton, pelagic detritus, dissolved organic carbon, dissolved organic nitrogen, ammonium and nitrate. In this paper, the seasonal changes of...
Biotechnological processes represent a challenge into the control field, due to its high non linearity. Particularly, continuous alcoholic fermentation by Zymomonas mobilis (Z.m) presents high ethanol performance, but it shows a highly oscillatory behavior in process variables, because of the influence of inhibition dynamics over Biomass, Substrate and Product concentrations; it is a significant challenge...
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