Three-section type biogas reactor

Abstract

The invention discloses a three-section type biogas reactor. The three-section type biogas reactor comprises a preliminary anaerobic zone, a main anaerobic zone and a methane bacterium separation zone, wherein a three-phase separator is arranged between the main anaerobic zone and the methane bacterium separation zone; the methane bacterium separation zone is communicated with the preliminary anaerobic zone through a vent pipeline; the preliminary anaerobic zone is communicated with the main anaerobic zone through a water pipeline. Wastewater pretreated in the preliminary anaerobic zone enters the main anaerobic zone and is mixed with anaerobic microorganisms in anaerobic sludge to have an organic matter biodegradation reaction, biogas is generated, the biogas and the sludge are separated by the three-phase separator, the biogas rises to the methane bacterium separation zone and enters the preliminary anaerobic zone to be mixed with the wastewater, fine methanogens in the biogas absorb and degrade the wastewater, so that the biogas and the methanogens are separated, and the biogas is discharged or is continuously used in the next step. The three-section type biogas reactor can totally recycle biogas energy and increase the granulation rate of methane bacteria, and has the advantages of simple structure, small occupied area, low investment cost, low maintenance rate, low power consumption, low operating cost, simplicity in operation and management and the like.

Description

technical field [0001] The invention relates to waste water treatment equipment in the technical field of environmental protection, in particular to a three-stage biogas reactor. Background technique [0002] The biological treatment methods of wastewater can be divided into two categories: aerobic biological treatment methods and anaerobic biological treatment methods. Among them, aerobic methods can treat low organic matter content, such as domestic wastewater and aerobic biodegradable wastewater; anaerobic treatment mainly Treating refractory wastewater, but simple anaerobic treatment is difficult to meet the discharge standards, generally followed by aerobic treatment. In addition to biological treatment, wastewater treatment also includes physical and chemical methods, membrane methods, electrochemical methods and so on. [0003] Anaerobic biological treatment of wastewater refers to the process of decomposing and converting various complex organic substances in wastew...

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Problems solved by technology

[0005] The technical problem solved by the present invention: in the pretreatment process of wastewater anaerobic biological treatment, air aeration is used to stir or adjust water quality and water volume to pre-acidify wastewater, so that a small amount of dissolved oxygen in wastewater enters the anaerobic reactor and impacts methane production The production of bacteria affects the oxidation-reduction potential of the anaerobic reaction and corrodes the anaerobic reactor equipment, resulting in loose sludge, low organic load, and poor treatment effect

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