Gas expanded granular sludge bed anaerobic reactor

Abstract

The invention discloses a gas expanded granular sludge bed anaerobic reactor. The reactor comprises an anaerobic reaction body (9), a water pump (6), a Venturi tube (5), a biogas circulation pipeline (8), a feeding tank (7), a discharging port (3), a gas outlet (2), a gas holder (1) and a sampling hole (4). According to the gas expanded granular sludge bed anaerobic reactor, sewage is sucked by the water pump (6), is mixed with biogas through the Venturi tube (5) and then enters the anaerobic reaction body (9) through jet, uniform distribution of gas and the liquid is realized, the circulated biogas amount can be controlled by controlling the external circulation pipeline (8), and the expansion degree of granular sludge in the reactor is controlled.

Description

technical field [0001] The invention relates to an anaerobic reactor for gas-expanded granular sludge bed. Background technique [0002] Anaerobic reactors include both traditional reactors and modern high-efficiency reactors. After more than a hundred years of development, the anaerobic process has developed from the first generation of anaerobic digesters to the second generation of anaerobic filters (AF) , anaerobic fluidized bed reactor (AFB), upflow anaerobic sludge bed reactor (UASB) and the third generation of expanded granular sludge bed reactor (EGSB and IC) in various reactor forms. [0003] The traditional expanded granular sludge bed mainly uses the rising flow rate of effluent circulation and fermentation to generate biogas to expand the granular sludge, which improves the contact between organic matter and microorganisms in the wastewater, strengthens the mass transfer effect, and improves the efficiency of the reactor. Biochemical reaction speed, thus greatly...

AI Technical Summary

Problems solved by technology

However, in the early stage of start-up, due to the low volume load of COD and the small gas production of the system, after a period of operation, the sludge bed is prone to compaction, resulting in channel flow or even plug flow, which makes the distribution of influent water uneven and easy to flow in the reaction zone. There are dead angles inside, and the above phenomenon will also occur when treating medium and low concentration wastewater

This will reduce the mass transfer efficiency between the organic pollutants in the sewage and the anaerobic sludge in the reactor, which will slow down the reproduction and metabolism of some anaerobic microorganisms, and the reactor volume will not be effectively used, thereby reducing the treatment efficiency.

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