ASBR liquid level control system and control method

Abstract

ASBR liquid level control system and control method. The system includes a raw water tank and a reaction tank connected to the raw water tank. A drain pipe is installed in the reaction tank. The drain pipe at the front end of the valve is also connected with a siphon / overflow pipe connected to the raw water pool. The highest level of the siphon / overflow pipe is the same as the water inlet control level of the reaction tank. The upper end of the reaction tank is an air chamber, and the outlet of the air chamber passes through The exhaust pipe, the exhaust valve installed on the exhaust pipe, and the gas purification system are connected to the gas storage tank. The inlet of the air chamber is connected to the gas storage tank through the intake pipe and the pressure reducing valve installed on the intake pipe, and it is easy to realize Automatic control; the control method of the present invention enables the ASBR to effectively prevent sludge loss, rapid accumulation of anaerobic activated sludge, and rapid formation of granular sludge, greatly shortening the reactor start-up time and maintaining a high volumetric load.

Description

technical field [0001] The invention belongs to the process control of ASBR, in particular to an ASBR water inlet liquid level, drainage and slag discharge liquid level control system and using method. Background technique [0002] During the anaerobic treatment of high-concentration organic wastewater, when other factors are determined, effective control of sludge loss is the key to achieving rapid accumulation of anaerobic activated sludge and maintaining as high a concentration as possible, that is, high-concentration organic wastewater is anaerobic The key to high oxygen handling efficiency. ASBR (Anaerobic Sequencing Batch Reactor) is referred to as a sequencing batch anaerobic reactor, which adopts the operation mode of "water inflow / reaction / drainage". 1) Water intake: 10 to 30 minutes, large flow of water in a short time to ensure uniform mixing of mud and water, and no short flow area. This is of special significance to how to prevent the formation of short-flow a...

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Problems solved by technology

[0004] However, at present, there is no engineering case of domestic ASBR process, and the control system and control mode (water intake / reaction / drainage) of the ASBR process have been reported at home and abroad.

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