Self-circulation anaerobic reactor

Abstract

The invention discloses a self-circulation anaerobic reactor. The self-circulation anaerobic reactor comprises a tank body, a water distributor, a sewage return pipe, a marsh gas flow guide device, an isolating inner cylinder, a three-phase separator and the like. The tank body is internally divided into several regions which are a mixing region, a main reaction region, a main marsh gas separating region, an auxiliary reaction region and a solid, liquid and gas three-phase separating region (containing a setting region) through the devices. Inner circulation is automatically formed by sewage in the regions under the raising action of marsh gas. As inner circulation is formed, rising flow speed of the main reaction region is increased, the contact area between organic matter in the main reaction region and anaerobic biological bacteria is increased, and water quality purification speed is increased. The concentration of input water is reduced by the self circulation, the concentration gradient of organic acid in a reactor is reduced, the living environment of the anaerobic biological bacteria is improved, and the degradation rate of the anaerobic biological bacteria is increased. As the self-circulation reactor is ingenious in structure, the self-circulation amount can be several times that of an existing anaerobic reactor. Output water is high and stable in quality, the requirement for designing anaerobic water output can be met without multi-level arrangement.

Description

technical field [0001] The invention relates to a wastewater treatment technology, in particular to a self-circulating anaerobic reactor Background technique [0002] Organic waste in sewage is the most important pollutant that causes environmental pollution, and it is the main cause of deterioration, blackening and smelly water. Organic waste can exist in the form of suspended matter, colloidal matter or dissolved organic matter in wastewater. In water pollution control, TS (solid content), chemical oxygen demand (COD) and biochemical oxygen demand (BOD) are mainly used ) as the monitoring target. [0003] Generally speaking, biological method is the most economical and effective method to remove organic matter in wastewater, especially for organic wastewater with high BOD content in wastewater. The biological method is to use the metabolic activities in the life process of microorganisms to decompose organic waste into simple inorganic substances to remove organic pollut...

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Problems solved by technology

[0008] However, UASB, EGSB, and IC reactors all have some shortcomings. UASB has a large area, poor water distribution uniformity, and small water conservancy load; EGSB occupies a small area, but EGSB generally has a huge "head". Its function is to separate gas, solid and liquid. If the "brain" is not big enough, the effect of gas, solid and liquid three-phase separation will not be achieved. This situation brings great difficulties to the construction of EGSB. In addition, EGSB also has an external reflux system, relying on this system, the anaerobic organisms in the reactor can be fluidized, but it also increases a large amount of power consumption; IC does not need a huge "brain", nor does it need an external reflux system , but needs a higher "head". The function of this higher "head" is not only to provide three-phase separation of gas, solid and liquid, but also to realize the reflux in the reactor by relying on the biogas generated by the reactor itself. However, this high "height" does not participate in the anaerobic biological fluidization reaction, so it consumes part of the effective volume of the reactor, and the construction cost is greatly increased

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