PREDICTION OF THE PROCESS OF BIOLOGICAL DEFERRIZATION OF UNDERGROUND WATER IN A BIOREACTOR
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2019, Vol 5, Issue 10
Abstract
Research in the field of groundwater treatment indicates the prospects for the development of its complex purification involving various morphological types of microorganisms, fixed on inert contact materials. It was indicated that at certain parameters of water quality (pH 6–7; Eh 50...200 mV, in the presence of dissolved carbon dioxide and at magnitudes of permanganate oxidation of up to 5 mg О2/dm3), development of bacteria of genus Gallionella prevails in groundwater, and development of bacteria of genera Lepthothrix, Crenothrix prevails at pH values of 6.5–7.5; Eh=–200...300 mV and PО>5 mg О2/dm3. This provides a series of advantages in the use of the biochemical method over conventional physical and chemical methods, in particular, acceleration of the process of water purification from ferrite compounds. It was shown that much less attention was paid to modeling the kinetics of the processes of treatment of underground water in bioreactors than to conventional physical-chemical methods, for which modern mathematical models were developed. That is why the development of the direction of modeling the biochemical process of water purification from iron compounds is a relevant task. The mathematical model is represented by the Cauchy problem for a nonlinear system of differential equations in partial derivatives of the first order. The system of the Cauchy problem consists of five equations with five unknown functions, which describe the distribution the concentration of ferrum cations, bacteria and the matrix structures in two phases (movable and immobilized) both in space and time. When constructing the model, we used both technological (maximum contamination capacity (2.6 kg/m3), boundary magnitude of the bacteria biomass in the matrix structures (9.5 g/m3), maximum specific rate of their growth (0.17–0.18 h–1), saturation coefficient (0.65–0.7 g/m), flow rate in the range of 5–20 m/h), and design parameters (the height of contact load of a bioreactor – 1.3 m). In the considered model, the time of effective operation of a bioreactor depends on the concentrations of cations of Fe2+, which in natural waters can be in the range of 0.5–20 mg/dm3, the number of ferrobacteria (102–104 kl/dm3), as well as the water flow rate. The inverse influence of the characteristics of the process, in particular, the concentration of matrix structures in the inter-pore space, as well as characteristics of the medium with the help of coefficients of mass exchange and porosity, were taken into account. The model allows determining the optimum operation time of a bioreactor between washings
Authors and Affiliations
Alexander Kvartenko, Igor Prysiazhniuk
Keywords
Related Articles
- EP ID EP668904
- DOI 10.15587/1729-4061.2019.177537
- Views 84
- Downloads 0
Effect of a flameretardant coating on the burning parameters of wood samples
<span lang="EN-US">The studies of influence of wood fire protection on ignition have established parameters of flame propagation and combustion suppression which makes it possible to influence this process. It was proved...
Analysis and selection of the parametric profile of a powerplant engine for a light trainer aircraft
<p>The relevance of this study is predetermined by the improvement to the fuel efficiency of an aircraft and, as a consequence, by the reduced cost of the life cycle of an aircraft engine, which is part of a power assemb...
Application of intelligent processing of data flows under conditions of river navigation
<p>Implementation of a context-oriented approach for intelligent processing of navigation data flows in operation of water vehicles was considered. The initial sample of processing data flows in the conditions of the cur...
Substantiation of the mechanism of interaction between biopolymers of ryeandwheat flour and the nanoparticles of the magnetofооd food additive in order to improve moistureretaining capacity of dough
<p class="a">The mechanism of influence of the Magnetofood additive on the moisture retaining in rye-and-wheat dough of various acidities was established. In a neutral medium, solvated Magnetofood nanoparticles are forme...
Modeling of the process of the shot based on the numerical solution of the equations of internal ballistics
<p>The study of the process of firing a firearm, taking into account the degree of wear of the barrel, requires an assessment of the losses of powder gases due to their breakthrough between the barrel walls and the proje...