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Method for rapidly recovering nitrogen and phosphorus removing properties of low-temperature aerobic granular sludge

An aerobic granular sludge, nitrogen and phosphorus removal technology, applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc., can solve the problems of low synchronous removal rate and slow recovery process , to achieve the effects of stable and efficient process, simplified start-up and stable operation

Inactive Publication Date: 2011-08-17
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of slow recovery process and the synchronous removal of COD, nitrogen and phosphorus when the recovered aerobic granular sludge is used at low temperature when the existing technology is used to treat the stored aerobic granular sludge In order to solve the problem of low efficiency, it provides a method for rapid recovery of nitrogen and phosphorus removal characteristics of low-temperature aerobic granular sludge

Method used

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Experimental program
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Effect test

specific Embodiment approach 1

[0008] Specific embodiment 1: The method for rapid recovery of nitrogen and phosphorus removal characteristics of low-temperature aerobic granular sludge of this embodiment is carried out according to the following steps: 1. Take the mature aerobic culture in an intermittent air-lift internal circulation reactor operating at 10°C Granular sludge, after sedimentation, discard the supernatant, then add matrix solution and store in a refrigerator at 4℃ to obtain aerobic granular sludge preserved at low temperature; 2. Return the aerobic granular sludge preserved at low temperature to 10℃ In the operating intermittent airlift internal circulation reactor, the influent COD is 2000mg / L, the C / N ratio is 100:15, and the aeration volume is 0.10m 3 Run for 33 days under the condition of / h for recovery, that is, complete the rapid recovery of the nitrogen and phosphorus removal characteristics of low-temperature aerobic granular sludge; in step 1, the matrix solution is composed of 100.0m...

specific Embodiment approach 2

[0014] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, the matrix solution is added in a volume ratio of 1:0.4 to the aerobic granular sludge. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0015] Specific embodiment three: This embodiment is different from specific embodiment one in that in step one, the matrix solution is added at a volume ratio of 1:0.6 to aerobic granular sludge. Other steps and parameters are the same as in the first embodiment.

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Abstract

The invention discloses a method for rapidly recovering nitrogen and phosphorus removing properties of low-temperature aerobic granular sludge, relates to a method for rapidly recovering the aerobic granular sludge and aims to solve the problems of slow recovery process and low synchronous COD, nitrogen and phosphorus removing rates during the use of recovered aerobic granular sludge at a low temperature when stored aerobic granular sludge is treated by the prior art. The method comprises the following steps of: 1, depositing the aerobic granular sludge in a reactor, discarding supernate, adding matrix solution into the deposit and storing the mixture in a refrigerator at the temperature of 4 DEG C to obtain the aerobic granular sludge stored at a low temperature; and 2, putting the aerobic granular sludge stored at the low temperature back to the reactor to recover the aerobic granular sludge. The recovery process for the nitrogen and phosphorus removing properties of the low-temperature aerobic granular sludge is fast. The rapidly recovered low-temperature aerobic granular sludge has high synchronous COD, nitrogen and phosphorus removing rates and good effect; and the COD, NH4<+>-H and PO4<3->-P removing rates reach 94.5 percent, 97.0 percent and 93.1 percent respectively.

Description

Technical field [0001] The invention relates to a method for rapid recovery of aerobic granular sludge. Background technique [0002] The eutrophication of water bodies has become increasingly prominent, making the control of sewage nitrogen and phosphorus discharge a research focus in the field of environmental pollution control. Traditional biological nitrogen and phosphorus removal systems have poor sludge performance and treatment effects, especially at low temperatures, and have varying degrees of sludge expansion problems that affect the normal operation of the system. Aerobic granular sludge is a special biofilm structure. It has great potential for development due to its good settling performance, low cost, high biomass and treatment efficiency. When granular sludge is processed, the recovery process is slow, and the recovered aerobic granular sludge has a low simultaneous removal rate of COD, nitrogen and phosphorus, especially at low temperature (10°C) because the acti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 于水利王硕时文歆暴瑞玲杨倩倩
Owner HARBIN INST OF TECH