Rapid starting method for SNAD process in upflow micro-aerobic membrane bioreactor

A membrane bioreactor, rapid start-up technology, applied in chemical instruments and methods, aerobic and anaerobic process treatment, biological water/sewage treatment, etc., can solve problems such as instability and long start-up period of SNAD process, and achieve cost Low cost, small footprint and low energy consumption

Active Publication Date: 2019-01-11
国拓化能环境科技(北京)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the problem of long and unstable start-up period of the SNAD process, the present invention provides a quick start-up method of the SNAD process in an upflow micro-aerobic membrane bioreactor, by controlling the concentration of dissolved oxygen, effluent NH 4 + -N and NO 2 - -N ratio and membrane module interception of sludge and other methods to realize the rapid start-up of the SNAD process

Method used

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  • Rapid starting method for SNAD process in upflow micro-aerobic membrane bioreactor

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Embodiment 1

[0031] A method for quickly starting the SNAD process in an upflow type micro-aerobic membrane bioreactor, mainly comprising the following steps:

[0032] (1) Inoculation of activated sludge and equipment

[0033] Such as figure 1 As shown in , the upflow micro-oxygen membrane bioreactor SNAD process quick start device, reactor 1 is a cylinder with interlayer, inner diameter 0.07m, outer diameter 0.09m, height 1.2m, effective volume 4L. Reactor 1 is equipped with a polyvinylidene fluoride (PVDF) hollow fiber membrane 8 with a pore diameter of 0.3 μm and an effective membrane area of ​​0.3 m 2 .

[0034] The water inlet pipe connected to the bottom water inlet 4 of the reactor 1 is connected to the water inlet pump 2, the aeration pipe connected to the aeration port 5 at the bottom of the reactor 1 is connected to the air pump 3, and the aeration pipe connected to the aeration port 5 The head 7 is a cylindrical titanium aeration head with a pore size of 5 microns, and the sl...

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Abstract

The invention discloses a rapid starting method for an SNAD process in an upflow micro-aerobic membrane bioreactor. In the upflow micro-aerobic membrane bioreactor, low C/N ratio wastewater is used asinfluent, an operation mode with a high sludge concentration of 16.0 g/L and a low sludge load of 0.064 kg COD/kgSS is used at the initial stage of starting, a ratio of ammonia nitrogen to nitrite nitrogen in effluent is controlled within a certain range by mainly adjusting the DO, the temperature, the alkalinity and the like, and the residence mode is timely shortened to increase the nitrogen load and the carbon load so as to rapidly start an SNAD process, such that the anaerobic ammonium oxidation particles are coexisted with the floc sludge. According to the present invention, the system can efficiently and synchronously remove carbon and nitrogen, has the COD removal rate, the NH4<+>-N removal rate and the TN removal rate of 89%, 96% and 86%, and further has advantages of small occupation area, simple operation and low energy consumption.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to a method for quickly starting a short-cut nitrification-denitrification-anaerobic ammonium oxidation (SNAD) process in an upflow micro-aerobic membrane bioreactor, which can quickly start the short-cut nitrification-denitrification-anaerobic process The ammonia oxidation process is suitable for low C / N ratio wastewater treatment. Background technique [0002] The SNAD process refers to a new biological denitrification technology in which short-range nitrification, short-range denitrification and anammox occur simultaneously. It has the advantages of low energy consumption, small demand for carbon sources, low sludge output, small footprint, and efficient decarbonization and nitrogen removal. And other characteristics, suitable for industrial wastewater or municipal sewage with low C / N. However, due to the long generation cycle of anammox bacteria in the SNAD system and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
CPCC02F3/307C02F2209/08C02F2209/14C02F2209/16
Inventor 苏本生郭佳刘广青王雯张原洁
Owner 国拓化能环境科技(北京)有限公司
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