1, overview

UASB reactor for wastewater by as evenly into the bottom of the reactor, the sewage to the sludge beds containing granular sludge or flocculent sludge. Anaerobic reaction occurred in the process of wastewater and sludge particles contact. The methane (mainly methane and carbon dioxide) produced in the anaerobic state has caused the internal circulation, which is beneficial to the formation and maintenance of granular sludge. Some gases formed in the sludge layer are attached to the sludge particles, and the gas is attached to the top of the reactor. Up to the surface of sludge impinging on the bottom of a three-phase reactor gas emitter, causing the sludge to bubble up to the bubble. After the bubble is released, the sludge particles will be deposited onto the surface of the sludge bed, and the gas is collected at the top of the reactor.

2, working principle

UASB reactor for wastewater by as evenly into the bottom of the reactor, the sewage to the sludge beds containing granular sludge or flocculent sludge. Anaerobic reaction occurred in the process of wastewater and sludge particles contact. The methane (mainly methane and carbon dioxide) produced in the anaerobic state has caused the internal circulation, which is beneficial to the formation and maintenance of granular sludge. Some gases formed in the sludge layer are attached to the sludge particles, and the gas is attached to the top of the reactor. Up to the surface of sludge impinging on the bottom of a three-phase reactor gas emitter, causing the sludge to bubble up to the bubble. After the bubble is released, the sludge particles will be deposited onto the surface of the sludge bed, and the gas is collected at the top of the reactor. The baffle which is placed under the gap of the gas collecting chamber is arranged in the gas emitter and prevents the methane gas from entering the settling area, otherwise the flocculation of the precipitation area can be caused. The liquid that contains a number of residual solids and sludge particles passes through the gap in the separator and enters the settling zone.

The flow area of the inclined wall of the separator is increased when the flow area is close to the water surface, so the rising velocity is lower than that of the discharge point. Due to the flow rate, the sludge settling zone can be reduced by flocculation and sedimentation. The accumulation of sludge on the three-phase separator to a certain extent will exceed the friction force on the inclined wall, which will slip back into the reaction zone, which will react with the influent organic matter.

4, specification model table