Biological fluidized bed reactor

Abstract

The invention discloses a biological fluidized bed reactor. The biological fluidized bed reactor comprises a barrel body, wherein a solid-liquid separation zone, a second internal circulation zone, a first internal circulation zone and a complete mixing zone are sequentially arranged inside the barrel body; a mud collecting plate is arranged at the bottom of the complete mixing zone; a water inlet pipe is arranged above the mud collecting plate; the water inlet pipe extends upwards from the bottom of the complete mixing zone to form a plurality of water inlet branch pipes; a first gas guide plate and a first mud guide plate are further arranged at the top of the complete mixing zone; the water inlet branch pipes can be in mutual basin matching with the inverted conical structures of a nozzle 20 and the mud collecting plate 22, so that the biomass carrier after sufficient reaction can be intensively mixed with eutrophic sewage to be treated, the microorganism can be enabled to fully proliferate, and the treatment capacity can be enhanced. The biological fluidized bed reactor disclosed by the invention brings convenience for circulation of the biomass carrier, so as to promote microbial genetic evolution in the reactor and enhance the treatment capacity.

Description

technical field [0001] The invention relates to a biological fluidized bed reactor, which belongs to a high-efficiency anaerobic reactor applied to secondary anaerobic treatment of wastewater. Background technique [0002] Fuel ethanol has the characteristics of cleanness and regeneration, which can reduce the emission of carbon monoxide and hydrocarbons in automobile exhaust. It is an important part of renewable energy. important role in increasing income. At present, the national strategic plan for the development of fuel ethanol requires "not to compete with others for food, not to compete with food for land", actively and scientifically develop non-grain fuel ethanol, insist on focusing on non-food, encourage the diversification of raw materials, and become the development trend of fuel ethanol technology. Potato starchy fuel ethanol mainly includes root starchy raw materials such as cassava and sweet potato. Because of its good processing performance, it has been used ...

AI Technical Summary

Problems solved by technology

Potato starchy fuel ethanol mainly includes root starchy raw materials such as cassava and sweet potato. Because of its good processing performance, it has been used as an ideal substitute raw material for large-scale fuel ethanol production. In the production process of potato non-grain starchy fuel ethanol A large amount of acidic, high-temperature and high-concentration organic wastewater is produced, and 11-15 tons of process wastewater can be produced for every 1 ton of fuel ethanol produced. Large, high content of suspended solids and difficult solid-liquid separation. However, the waste water produced in the process of producing fuel ethanol from non-grain starch raw materials also faces many problems in the process of meeting the discharge standards: such as high content of suspended solids and difficult treatment , the processing cost is high, and it is difficult to apply to large-scale industrialization development, etc.

However, the fuel ethanol wastewater treatment device tends to accumulate biofilm carriers at the top of the reactor during use, and adopts a multi-section partitioned area design, which is not conducive to the circulation of biofilm carriers, resulting in the inability of microorganisms in the fluidized bed to achieve multiple Generation cycle selection is not conducive to the genetic evolution of microorganisms in the biofilm towards a direction that is more suitable for the material to be treated

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