An autotrophic denitrification granular sludge reactor with automatic floating mud crushing cycle

Abstract

An autotrophic nitrogen removal granular sludge reactor capable of automatic floating-sludge smashing and circulating is provided. The reactor comprises a reactor body and an external control device. A sludge-discharge water-distributing unit, a reaction unit, a floating sludge smashing unit, a smashed sludge collecting unit, a smashed sludge circulating unit and a water discharging unit are disposed from bottom to top in the reactor body. The sludge-discharge water-distributing unit comprises a water inlet, an aeration head and a sludge discharging opening. The floating sludge smashing unit comprises a gas collecting chamber, an injection pipe and a baffle plate. The smashed sludge circulating unit is provided with a guiding separator plate and a down flow pipe. The water discharging unit comprises an overflow hole, a water discharging groove disposed outside the smashed sludge circulating unit, and a water outlet communicated with the outside. The external control device comprises a water level relay and a control valve. Beneficial effects of the reactor are that: by utilization of energy contained in aeration residual air and autotrophic nitrogen removal generating gas, bubbles on the surfaces of floating granular sludge are removed, and inner air bags in the granular sludge are broken, and multiple functions of "collection, smashing, precipitation and returning" of the floating granular sludge are achieved.

Description

technical field [0001] The invention relates to an autotrophic denitrification granular sludge reactor with automatic floating sludge crushing cycle. Background technique [0002] In recent years, excessive discharge of ammonia-containing wastewater has caused a series of ecological and environmental problems such as eutrophication of water bodies. The efficient and low-consumption treatment of ammonia-containing wastewater has always been a difficult problem in the field of sewage treatment. [0003] The integrated full autotrophic denitrification process (Formula (1)) has the advantages of no additional organic carbon source, high denitrification load, low infrastructure cost, compact structure, simple operation and control of the device, and can effectively avoid the accumulation of nitrite caused inhibition. [0004] NH 3 +0.85O 2 →0.11NO 3 - +0.44N 2 +1.43H 2 O+0.14H + (1) [0005] However, the current full autotrophic denitrification reactor often has a serio...

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Problems solved by technology

[0005] However, the current full autotrophic denitrification reactor often has a serious problem of granular sludge floating, which will lead to a large loss of anammox bacteria, and it is difficult to collect the sludge after it is lost

The ineffective retention of bacteria in the reactor will directly affect its denitrification performance, which is not conducive to the potential of the reactor and the long-term stable operation of the process. This is a bottleneck in the industrial application of high-efficiency full-scale autotrophic denitrification reactors.

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