Water inlet device and water inlet method for anaerobic reactor

Abstract

The invention discloses a water inlet device and a water inlet method for an anaerobic reactor. Most of anaerobic bacteria are strictly anaerobic bacteria which are extremely sensitive to oxygen; and however, in practice, inlet water is required to be changed every day or every other day, so that controlling dissolved oxygen in the inlet water of the reactor to a relatively low level becomes very important. The water inlet device consists of three parts, namely a water inlet barrel, a water inlet barrel cover and a gas producing main body, wherein a feed port is formed in the water inlet barrel cover; the water inlet barrel cover is connected with the gas producing main body through a connecting component; the gas producing main body is fixed through the connecting component and a siphon; a solid material is fed from the feed port, a liquid material is fed through the siphon, and after gas-liquid mixing, a gas producing reaction can be performed; and the solid material is carbonate or bicarbonate, the liquid material is acid, and produced gas is CO2 which forms a CO2 atmosphere. Through the water inlet device and the water inlet method, continuous dissolution of oxygen in air into the inlet water can be simply and effectively prevented, so that the low-oxygen state of the inlet water is kept; besides, the produced CO2 can supplement an inorganic carbon source required by autotrophic bacteria, so that the growth of anaerobic autotrophic bacteria and stable operation of the anaerobic reactor are facilitated.

Description

technical field [0001] The invention discloses a water inlet device and a method for an anaerobic reactor. Background technique [0002] The development of anaerobic reactors has gone through three eras: first-generation reactors: represented by anaerobic digesters, where wastewater and anaerobic sludge are completely mixed, and are low-load systems. Second-generation reactors: solid The separation of residence time and hydraulic retention time can maintain a large amount of activated sludge and a long enough sludge age, and pay attention to the cultivation of granular sludge, which is a high-load system. The third generation reactor: in the solid residence time and hydraulic retention time Under the premise of phase separation, the solid and liquid phases are fully contacted, so that a large amount of sludge can be maintained, and the wastewater and activated sludge can be fully mixed, and the scope of application of traditional anaerobic biotechnology can be expanded in th...

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Problems solved by technology

[0008] However, the anammox bacteria are autotrophic bacteria, the cell yield is very low, the doubling time is very long, and they are sensitive to environmental conditions (such as water quality, temperature, etc.), resulting in a very slow start-up process of the reactor.

In the start-up process, a slightly high oxygen concentration in the influent will inhibit the enrichment and cultivation of anammox bacteria, which further leads to a long start-up time of the anammox reactor, which limits the engineering of the process application

[0009] For anaerobic ammonium oxidation reactors such as UASB and MBR, once the reactor starts to leak air and enter oxygen, the concentration of dissolved oxygen in the reactor will be high, and the operating performance will decline rapidly, and the conversion rate of ammonia nitrogen will decrease. At the same time, the conversion rate of nitrate nitrogen will rise, resulting in a prolonged anammox start-up time

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