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Gas-lifting internal circulation intermission aerobic granule sludge reactor and water treatment process thereof

An aerobic granular sludge and reactor technology, applied in water/sludge/sewage treatment, biological water/sewage treatment, chemical instruments and methods, etc., can solve the problems of easy disintegration, unstable sludge, and affecting treatment effects, etc. problems, to achieve the effect of less residual sludge, easy separation of sludge and water, and good mixing performance

Inactive Publication Date: 2008-12-31
HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

However, particle stratification can be observed in the SBR reactor. The amount of granular sludge in the upper part of the reactor is smaller than that in the lower part of the reactor, resulting in rapid growth of sludge in the upper part, resulting in larger diameter and higher density. Small granular sludge, and this kind of sludge is unstable and easy to disintegrate, affecting the treatment effect

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  • Gas-lifting internal circulation intermission aerobic granule sludge reactor and water treatment process thereof

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Effect test

Embodiment 1

[0045] Embodiment 1: airlift type internal circulation batch reactor, the main body is a plexiglass cylinder, divided into inner and outer sleeves, wherein the outer tube 8 (downflow tube) has an inner diameter of 8 cm and a height of 120 cm, and the inner tube 7 (up flow tube) The inner diameter is 6cm, the height is 90cm, the total volume is 5.0L, and the ratio of height to diameter is about 15. The water is fed from the upper part of the reactor by the water inlet pump 2, and the air is fed from the bottom of the riser tube of the reactor by the air pump 4. The air flow is given by Controlled by the gas flow meter 5, the surface air velocity is not less than 2.4cm / s to ensure the smooth circulation of the mixed liquid. The specific air flow can be determined according to the properties and water quality of the inoculated sludge. Driven by the updraft, the mixed liquid in the reactor is in a state of circulating flow between the riser tube 7 and the downcomer tube 8, moves up...

Embodiment 2

[0050] Embodiment 2: using the reactor described in Example 1, the influent adopts the simulated water sample configured by glucose, the influent COD load is 1200-1600mg / L, and the inoculum sludge used for reactor start-up is ordinary activated sludge, taken from In the secondary settling tank of the domestic sewage treatment plant, granular sludge is formed in the reactor after about 30 days, and the sludge concentration is 6000-7000mg / L. The reaction temperature is 30°C, and the reaction period is 6 hours (water intake: 10 minutes, aeration: first week: 320 minutes, second week: 325 minutes, after the third week: 330 minutes, precipitation: first week 15 minutes, second week 10 minutes , 5min after the third week; drainage: 15min), the removal rate of COD reached over 95% after the reaction system was running stably, and the removal rate of NH 3 -N removal rate is above 90%, TP removal rate is 70%, basically no residual sludge is produced.

Embodiment 3

[0051] Embodiment 3: The reactor described in Example 1 is adopted, the influent adopts actual domestic sewage, the influent COD load is 400-800mg / L, and the inoculated sludge used for reactor start-up is ordinary activated sludge, taken from domestic sewage treatment In the secondary settling tank of the plant, granular sludge is formed in the reactor after about 30 days, and the sludge concentration is 2500-3000mg / L. Operating at room temperature (25°C), the reaction cycle is 8 hours (10 minutes of water inflow, 445 minutes of aeration, 15 minutes of sedimentation, and 10 minutes of drainage), the surface air velocity is 2.4cm / s, and the COD removal rate of the reaction system is over 94% after the reaction system runs stably NH 3 -N removal rate is above 88%, TP removal rate is 80%, basically no residual sludge is produced.

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Abstract

The invention discloses an airlift type internal circulation intermittent aerobic granular sludge reactor, which comprises an organic glass column, a temperature controller, a water inlet tank, an aeration pump, a water feed pump, a draining pump, a flow meter, a programmable logical controller, etc. The main body of the reactor is the organic glass column and can be divided into an inner sleeve and an outer sleeve, and the inner one is an upspout, while the outer one is a downcast pipe; the ratio of height to diameter is 15. The exterior of the downcast pipe is provided with a water bath heating casing for controlling reaction temperature. Mixed liquor in the reactor flows between the upspout and the downcast pipe in internal circulation to endow granular sludge with a self-balanced micro-ecosystem, the property of the micro-ecosystem is suitable for an up-flow type wastewater treatment system. The reactor adopts the sequence batch operation mode and can realize automatic control by the programmable logical controller. The reactor of the invention has the advantages of flexible operation, compact structure, little sludge remained, good treatment effect, and the like, and can bear high volume load and impact load; furthermore, the reactor has small occupying space and can reduce pork barrel due to relatively large H / D.

Description

1. Technical field [0001] The invention belongs to the field of environmental engineering water treatment, and in particular relates to an air-lift internal circulation intermittent aerobic granular sludge reactor and a water treatment method for sewage biological treatment. 2. Background technology [0002] The biological treatment technology of sewage is an important measure to protect the environment for human survival and development. It directly affects the lives of the people and the sustainable development of society. The criteria for a sustainable sewage treatment process should be high efficiency, low consumption and input, small footprint and low nutrient loss. [0003] The current sewage biological treatment technology generally has the problems of long process flow, large infrastructure investment, high operating cost, large structure volume, and large sludge output, so that the current sewage treatment rate in my country does not exceed 50%, which has caused env...

Claims

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Application Information

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IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 宋志伟任南琪童龙燕
Owner HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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