External circulation system and external circulation process of high-speed anaerobic reactor

Abstract

The invention discloses an external circulation system and an external circulation process of a high-speed anaerobic reactor. The system includes a hydrolysis acidification pool, a high-speed anaerobic reactor, an aeration tank and an outer circulation tank, wherein the hydrolysis acidification pool is communicated with a bottom water inlet of the high-speed anaerobic reactor through a water supply pipe; a water supply pump is arranged on the water supply pipe; a water distributor is arranged at the bottom of the high-speed anaerobic reactor and is communicated with the water inlet; a water outlet pipe is arranged at the upper part of the high-speed anaerobic reactor; the water outlet pipe is respectively communicated with the outer circulating tank and the aeration tank; a backflow control valve is arranged on the first shunt pipe; the outer circulating pool is communicated with a water inlet in the bottom of the high-speed anaerobic reactor through a return pipe; an outer circulatingpump, an electromagnetic flowmeter and a check valve are sequentially arranged on the return pipe; and the outer circulating pool is communicated with a steam pipe. According to the present invention, the pretreatment is performed through the external circulation, such that the starting risk caused by the sudden starting is avoided, the time and the cost are saved, and the buffer capacity, the sewage treatment efficiency and the system stability of the high-speed anaerobic reactor are good.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an external circulation system of a high-speed anaerobic reactor and an external circulation process. Background technique [0002] Although the development of anaerobic treatment technology has a history of one hundred years, its rapid development has been in the past 20 years. The emergence of oxygen reactors and the in-depth understanding of the principles of anaerobic technology, anaerobic technology has provided an important means for the industrial treatment of a variety of industrial and domestic wastewater, and it has become an attractive technology with low cost and energy recovery. attract the attention of the world. Anaerobic treatment technology is still at the climax of its century-old development history, and high-speed anaerobic processors play a key role in this treatment technology. [0003] The treatment process of the high-speed anaerobic processor i...

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Problems solved by technology

[0004] However, there are still many defects in this treatment process at present. For the high-speed anaerobic reactor with a long start-up or a long shutdown time and a second start-up, the temperature in the tower is low, and the anaerobic microorganisms sink to the bottom and are in a dormant state. Under the impact of low temperature and high load, it will cause physiological disorder of anaerobic microorganisms and system collapse, thereby increasing the risk of starting. To avoid this phenomenon, nitrogen gas is often filled to assist in starting, but the time is long and the cost is high; at the same time, when COD When ≥5000mg / L, the high-speed anaerobic device directly feeds water. Due to the limitation of the organic load of the processor, the water intake is not large, and the rising flow rate is low. The role of tumbling, and even some dead zones, the wastewater cannot contact anaerobic microorganisms, which increases the difficulty of treatment, resulting in lower buffer capacity, stability and treatment efficiency of the entire processor

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