Water and wastewater purification process of natur

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Natural water and sewage purification process of biological absorption method (Ⅱ)

Fluid in the process of organic matter raised some approximation method. Presented for the low porosity and dense layer of biological activated carbon adsorption process approximation model can also be used to describe the porous material fact can not be adsorbed by the material of the adsorption process. Absorbent particles proved biofilm formed on the surface of the organic process of the migration and absorption of an impact. The size of the process and air and liquid flow rate is closely related to the filter. Bio-absorption process in the simulation the most basic work, have hypothesized that the majority of organic matter in the adsorption process will be the beginning of adsorption,[link widoczny dla zalogowanych], after the biodegradation process is slow. During the simulation,[link widoczny dla zalogowanych], the literature of the use of partial differential equations, including the material balance equation, isotherm equation, biomass growth rate equation and the corresponding initial and boundary conditions. In the proposed approximation method, an extremely detailed description of the adsorption kinetics of her equation. However, given the complexity of biological mechanisms of the absorption process and on the mechanism of not sufficient, not necessary to power in 2001 on the adsorption treatment Information Report No. 5 of 35 science elaborate theoretical models. The duration of the absorption process does not affect the length of the whole process,[link widoczny dla zalogowanych], so it is best to absorb the model simplification addition, the equations reflect the biodegradation process to increase the biological process of constant, and a decision has not been rigorous methods have been made of these constants. Dense layer of bio-absorption process of the simulation, essentially aqueous solution using porous adsorbent model of adsorption kinetics of organic matter similar to,[link widoczny dla zalogowanych], but should be considered in the process of biological oxidation of various factors. Describe the dense layer of bio-absorption process equations, including liquid and solid material balance equation, biomass growth rate equation, and the corresponding initial and boundary conditions. Liquid material balance equation in the pure absorption process with the same situation, can the following equation: u reed state c) = o (1) Type in: I wide cross-section from the filter device to calculate the filtration rate; C (X,[link widoczny dla zalogowanych], t) the concentration of a liquid substance; (X + t) an absorbent particles surface concentration of organic matter; 0 mass transfer coefficient, the solid time and time was inversely proportional to unit volume of adsorbent characterization of absorption rate ; x, t of a dense layer respectively, the length of the closed coordinates and time coordinates. Kinetic equation and the absorption rate of absorbent particles on the surface of the growth rate of biomass linked to the equation of the form = control (c-c.) Professionals' Army \adsorption; r fixed porosity; pH of a bulk density of absorbent; Y a biological power factor; (X, t) bacteria on the surface of a sorbent particle density; k lay the promise of a constant equation; u a growth rate of biomass maximum. isotherm main way a = f (C.) (3j the equilibrium value of the phase interface with the local concentration of absorbed substance linked. reflect the dynamics of biomass growth relationship is expressed as: k (4 ) kC financial + ... where, k is a constant biomass breakdown. The question of the boundary conditions reflect the fact that the material is given away equipment, the initial concentration co, C (O. t) = Co (5) in the band a dense layer of equipment, and the beginning of adsorbate does not exist, that is a (x.O) = O (6j absorbent surface in the initial concentration of bacteria (X, 0) =.. O (7 ) equations (1) ~ (7) is to describe a certain biological accuracy of the absorption process of the original differential equations. can use numerical methods to solve this equation. in the use of biological processes known constant isotherm parameters and process value (the solution of the filtration rate, the initial concentration of material, porosity and dense layer of absorbent packing density), the case must be considered the same story within a particle concentration of a substance gap asked question at any time the distribution. can be This distribution compared with the experimental data to prove consistent with the model. In order to be calculated according to the model, the biological processes required parameters (Monod equation constant, constant rupture velocity of biomass and bio-energy constant). The last two values can solution data to determine the bacterial growth rate. Therefore, this paper presents the mechanism of biological absorption. filter packing in the role of bio-absorption process, and the absorption effect of a number of biological factors. absorption effect on the biological conditions and the dependence relations evaluated the use of bio-absorption process were discussed. discussed the existing number of biological absorption process model, to simulate the dense layer of biological absorption process, the proposed use of the porous absorbent adsorption of organic compounds in aqueous solution dynamic model, and consider the various biochemical components of the process. (Zhen-St translated \