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Anaerobic digestion device for biogas production enhanced by self-sustained air flotation

A technology for anaerobic digestion and biogas production, applied in biochemical cleaning devices, gas production bioreactors, enzymology/microbiology devices, etc., can solve the problems of lagging development of reactors, slow progress of anaerobic technology, and complex structures , to achieve the effect of avoiding insufficient degradation, simple structure and high degree of automation

Active Publication Date: 2020-12-08
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] With the emergence of the second-generation anaerobic reactor represented by the upflow anaerobic sludge bed (UASB) and the third-generation anaerobic reactor represented by the expanded granular sludge bed (EGSB), the anaerobic treatment of sewage The organic load (OLR) was increased to 50kg COD(m 3 d) -1 Even 100kg COD(m 3 d) -1 As mentioned above, anaerobic technology has made great achievements in the field of sewage treatment, and anaerobic theory is relatively perfect, but the progress of anaerobic technology in the field of organic solid waste is still slow
Due to its complex structure, organic solid waste has many technical difficulties in the anaerobic fermentation process, and the development of reactors for organic solid waste is relatively lagging behind

Method used

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  • Anaerobic digestion device for biogas production enhanced by self-sustained air flotation
  • Anaerobic digestion device for biogas production enhanced by self-sustained air flotation
  • Anaerobic digestion device for biogas production enhanced by self-sustained air flotation

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Embodiment

[0038] like figure 1 As shown, the anaerobic digestion device using self-sustained air flotation to strengthen biogas production in this embodiment includes anaerobic digestion main tank unit I, self-sustained air flotation screening unit and biogas metering, taking the fully mixed anaerobic reactor (CSTR) as an example The collection unit VI, wherein the self-sustaining air flotation screening unit is a four-part integrated type, specifically includes the air flotation screening part II, the material sedimentation part III, the active reflux part IV and the three-phase separation part V. The digested material in the anaerobic digestion main tank unit I is municipal sludge, which is pumped into the air flotation screening part II by the peristaltic sampling pump. The air flotation screening unit continuously feeds materials, and the light and highly active microorganisms are screened through the air flotation screening part II and the material sedimentation part III, and are l...

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Abstract

The invention provides an anaerobic digestion device for strengthening biogas production by using self-sustaining air flotation, which includes an anaerobic digestion main tank unit, a self-sustaining air flotation screening unit and a biogas metering and collection unit, and the self-sustaining air flotation screening unit includes sequentially from bottom to top The connected air flotation screening section, material settling section, active reflux section and three-phase separation section, the digested material in the anaerobic digestion main tank unit is pumped into the air flotation screening section, the overflow enters the material settling section, and then raised to the active The reflux part, the gas components of the three-phase separation part and the gas produced by the anaerobic digestion main tank unit enter the biogas metering and collection unit; the anaerobic digestion device of the present invention is based on the phenomenon that organic matter is degraded to produce biogas in the anaerobic process, by increasing The self-sustaining air flotation screening unit plays the role of self-sustaining air flotation-screening-returning highly active microorganisms and discharging materials that are more difficult to degrade, so as to effectively avoid the problem of insufficient degradation caused by short flow of materials during anaerobic digestion of organic solid waste.

Description

technical field [0001] The invention belongs to the technical field of anaerobic digestion of organic solid waste, and in particular relates to an anaerobic digestion device for strengthening biogas production by self-sustaining air flotation. Background technique [0002] At this stage, my country's organic solid waste mainly includes: domestic sources (urban sludge, domestic waste, garden waste, etc.), agricultural sources (agricultural straw, mulch, livestock and poultry manure, etc.) waste, etc.), the annual output exceeds 6 billion tons, accounting for more than 60% of the total solid waste generation, but a scientific and reasonable management and safe disposal technology system has not yet been formed. Organic solid waste has typical pollution properties, with complex components and many harmful media. It occupies an area of ​​land and forms multi-phase compound cross-contamination with the surrounding environment. [0003] The utilization methods of organic solid was...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12M1/107C12M1/16C12M1/36
CPCC12M21/04C12M21/16C12M41/48Y02E50/30C12M23/36C12M41/22C12M47/18C12M23/34C12M23/56C12M27/06C12M29/02C12M29/04C12M29/26C12M41/26C12M41/44C12M47/10
Inventor 戴晓虎张悦华煜蔡辰
Owner TONGJI UNIV
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