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

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

Inactive Publication Date: 2010-09-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0008] Specific embodiment 1: The method for rapid recovery of low-temperature aerobic granular sludge denitrification and phosphorus removal characteristics in this embodiment is carried out according to the following steps: 1. Take mature aerobic aerobic sludge from an intermittent air-lift internal circulation reactor operated at 10°C. For granular sludge, discard the supernatant after precipitation, then add matrix solution, and store in a refrigerator at 4°C to obtain aerobic granular sludge stored at low temperature; 2. Return the aerobic granular sludge stored at low temperature to 10°C In the running intermittent air-lift internal circulation reactor, the influent COD is 2000mg / L, the C / N ratio is 100:15, and the aeration rate is 0.10m 3 Run 33 days under the condition of / h, carry out recovery, promptly complete the rapid recovery of denitrification and dephosphorization characteristics of low-temperature aerobic granular sludge; wherein the matrix solution in step 1 i...

specific Embodiment approach 2

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

specific Embodiment approach 3

[0015] Embodiment 3: The difference between this embodiment and Embodiment 1 is that in step 1, the substrate solution is added in a volume ratio of 1:0.6 to the aerobic granular sludge. Other steps and parameters are the same as those in Embodiment 1.

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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 problem of water eutrophication is becoming more and more prominent, making the control of sewage nitrogen and phosphorus discharge a research focus in the field of environmental pollution control. The traditional biological nitrogen and phosphorus removal system has poor sludge performance and treatment effect especially at low temperature, and there are different degrees of sludge bulking problems, which affect the normal operation of the system. Aerobic granular sludge is a special biofilm structure, which has great development potential because of its good sedimentation performance, low cost, high biomass and treatment efficiency. Granular sludge treatment, there is a slow recovery process, and the recovered aerobic granular sludge has low synchronous removal rate of COD, nitrogen and phosphorus, especially at low temperature (10°C) d...

Claims

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Application Information

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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