Anaerobic reactor mass transfer strengthening method

Abstract

The invention provides an anaerobic reactor mass transfer strengthening method. According to the method, alternately-arranged segmental sieve pore plates are arranged to increase the turbulence of a fluid so as to improve the gas-liquid mass transfer effect; the sieve pores comprise positive horn-shaped pores and inverted horn-shaped pores; biogas generated by anaerobic digestion of sludge flows upward from the positive horn ports of the sieve plates under the action of pressure, wherein a small amount of the liquid flows upward through the sieve pores, and most of the liquid performs circumferential flow motion between the sieve plates so as to further increase the gas-liquid disturbance; and the granular sludge settles downward from the inverted horn ports of the sieve pore plates underthe action of gravity, and the fluid disturbance generates shear force so as to promote the formation of the granular sludge. According to the present invention, with the method, the mass transfer among gas, liquid and solid can be effectively promoted, the contact metabolism of anaerobic microorganisms can be easily achieved, and the anaerobic treatment effect and the methane conversion rate of sewage can be improved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a method for enhancing the treatment effect of an anaerobic reactor by mass transfer, in particular to the method of enhancing the mass transfer effect between the three phases of gas, liquid and solid in the anaerobic digestion process by adding sieve plates method. Background technique [0002] The UASB reactor is one of the earliest and most widely used anaerobic reactors. It was successfully developed in the 1970s by Professor Lettinga of Wageingen Agricultural University in the Netherlands and others. So far, more than 3,000 UASB reactors have been installed worldwide. The working process of UASB is generally that the raw water enters the bottom of the UASB reactor through the water pump, passes through the suspended sludge layer, the three-phase separator and the overflow weir in turn, and contacts the anaerobic sludge in the suspended sludge layer, an...

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Problems solved by technology

The third-generation anaerobic fluidized bed reactor represented by expanded granular sludge bed reactor (EGSB) and internal circulation reactor (IC) has attracted people's attention due to its high efficiency, stability and economy, but EGSB The external circulation and internal circulation of the IC reactor, as well as the large height-to-diameter ratio, greatly increase the difficulty of operation, start-up and domestication; reviewing the development of anaerobic reactors in recent years, it is not difficult to find that the anaerobic reactor Structural optimization starts with the fluidization of sludge, which only requires the sludge to be in suspension or to have a certain back-mixing effect, but fails to change the degree of turbulence and mass transfer effect. In the anaerobic reaction zone, gas, liquid The three phases of solid and solid move in the same direction, and the overall state is in a push flow state, and the degree of turbulence is not high. The mass transfer mainly depends on free diffusion, and the relationship between fluid flow and mass transfer in the anaerobic process is ignored.

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