Double-circulation anaerobic reactor

Abstract

The invention provides a double-circulation anaerobic reactor. The double-circulation anaerobic reactor comprises a cell body, wherein the cell body is sequentially divided into a cone-shaped sludge bulking region, a main reaction region, a secondary reaction region and a sediment region from bottom to top, a first-stage gas-solid-liquid separation region is arranged at the upper part of the main reaction region, a second gas-solid-liquid separation region is arranged at the upper part of the secondary reaction region, an effluent weir is arranged above the sediment region, a first-stage sewage gas pipe is connected between an air-water separation tank and the first-stage gas-solid-liquid separation region, a second-stage sewage gas pipe is connected between the air-water separation tank and the second-stage gas-solid-liquid separation region, a sewage gas circulating pipe is connected between the air-water separation tank and a water distribution pipe, the water distribution pipe is arranged at the bottom of the cell body, and a sludge discharging pipe is further arranged at the bottom of the cell body. The double-circulation anaerobic reactor has the advantages that the cell body has low height, the double-circulation anaerobic reactor can be started quickly by flocculent sludge with high shock load resistance, the requirement on a PH value of inflow water is low, granule sludge increases quickly, the processing energy consumption is low, the processing efficiency is high, the effluent quality is stable, and the double-circulation anaerobic reactor is simple to operate and convenience to run.

Description

technical field [0001] The invention relates to an anaerobic reactor used in the biochemical treatment stage in the industrial sewage treatment process, and belongs to the technical field of anaerobic reactors. Background technique [0002] The various anaerobic reactors used at this stage can be classified into high, medium and low speed reactors. Anaerobic reactors with a height of less than 10 meters and an ascending flow rate between 0.5-1.0 m / h are classified as medium-speed anaerobic reactors. The COD volume load of medium-speed anaerobic reactors is usually less than 5kgCOD.m3.d, and the start-up and Flocculent sludge can be used during operation. The medium-speed reactor covers a moderate area, saves investment, and is easy to operate, but the disadvantage is that it cannot be used for high-concentration water quality and sewage with poor biochemical properties, and the anaerobic sludge in the system is easy to lose. The high-speed anaerobic reactor is represented ...

AI Technical Summary

Problems solved by technology

The medium-speed reactor covers a moderate area, saves investment, and is easy to operate, but the disadvantage is that it cannot be used for high-concentration water quality and sewage with poor biochemical properties, and the anaerobic sludge in the system is easy to lose

The high-speed anaerobic reactor is represented by the IC characterized by the granular sludge reaction bed system. Its HRT (hydraulic retention time) is short and the volume load is high. Usually the COD volume load is greater than 5kgCOD.m3.d, but the startup and operation must use granular For sludge, the height-to-diameter ratio is usually required to be more than 2:1, and the ascending flow rate is required to be more than 1m / h, and the growth of granular sludge is slow, so fresh granular sludge needs to be replenished frequently

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