Rapid starting method of aerobic granule sludge technology

Abstract

The invention discloses a rapid starting method of an aerobic granule sludge technology. The method comprises the steps that step 1, water flow-in and water flow-out are synchronously conducted in a flow rising non-turbulent mode: common domestic sludge is inoculated in a reactor, waste water enters the reactor then, a sludge bed is filled with waste water in the state that the rising flow rate ofthe waste water is controlled to not disturb the sludge bed in the reactor, and a nitrobacterium colony inhibitor is added into the waste water; an effluent weir overflows while water flows in, and water flow-in and water flow-out are conducted synchronously; step 2, water drainage is conducted: aeration is conducted in the reactor in the non-overflowing state, and reactor water drainage time isset according to an emptying scale; step 3, aeration is conducted: air is blown into the reactor to conduct aeration by adopting a step DO control mode; and step 4, precipitation is conducted: the precipitation time is determined according to the sludge precipitation performance indicated by an SVI parameter, precipitation is conducted according to the precipitation time, sludge particles with theprecipitation speed being higher than a preset value are screened out through precipitation until precipitation is completed according to the precipitation time. Rapid starting of an aerobic granulesludge technology can be achieved by adding an additive inhibiting nitrification, the starting time is shorter, and the method can solve the problem that aerobic sludge granules are prone to being disintegrated.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a quick start method for an aerobic granular sludge process. Background technique [0002] Under specific culture conditions, microbial cells will spontaneously flocculate and proliferate to form granular sludge aggregates through physical, chemical, and biological interactions. In the past 20 years, sewage treatment technology based on aerobic granular sludge has emerged. Researchers have combined the high-efficiency oxidation characteristics of aerobic microorganisms with the high bioconcentration and good sedimentation performance of anaerobic digestion treatment systems to cultivate degradable organic matter and simultaneous denitrification. Phosphorus removal granulated sludge. [0003] In practical application, the formation of aerobic granular sludge means the successful start of the process. Both continuous flow reactor and SBR reactor can be used for the cultivation of ...

AI Technical Summary

Problems solved by technology

This process has strict requirements on organic load, shear force, operation cycle and other cultivation conditions, and it often takes 30-90 days or even longer to mature and stabilize, which makes it difficult for aerobic granular sludge to be applied on a large scale in practice. under construction

In addition, aerobic granular sludge is relatively unstable in long-term operation, and it is easy to cause particle disintegration, resulting in poor effluent quality.

[0005] Chinese patent application CN201110361536.2 discloses a method for accelerating aerobic granular sludge cultivation, that is, adding MgAlCO to flocculent activated sludge 3 -LDH is used as a sludge granulation accelerator, but this solution has high dissolved oxygen operation requirements and other reasons, which will cause a lot of energy waste

Chinese patent application CN201610841010.7 discloses a method for rapidly cultivating aerobic granular sludge, by adding lanthanum compounds and neodymium compounds to activated sludge to promote the growth rate of aerobic microorganisms, thereby reducing the cultivation time of aerobic sludge particles , but because lanthanum nitrate is explosive and biologically toxic, and the chemical properties of neodymium nitrate are unstable due to thermal decomposition, there are still problems that cannot be applied on a large scale

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