A method for accelerating the cultivation of aerobic granular sludge based on the method of increasing the concentration of nacl

An aerobic granular sludge, increasing concentration technology, applied in the direction of using microorganisms, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of temperature control, high cost, difficult large-scale engineering application, etc. , to achieve the effects of easy aggregation, increased hydrophobicity, and reduced repulsion barrier

Active Publication Date: 2021-10-01
SHANDONG UNIV
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Problems solved by technology

These methods generally have problems such as high cost and difficulty in large-scale engineering application.
And in the process of industrialized cultivation of aerobic granular sludge, the temperature is often not controlled, and the actual temperature is often lower than the suitable growth temperature of most microorganisms (about 25°C).

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  • A method for accelerating the cultivation of aerobic granular sludge based on the method of increasing the concentration of nacl
  • A method for accelerating the cultivation of aerobic granular sludge based on the method of increasing the concentration of nacl

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Embodiment 1

[0033] A method for accelerating the cultivation of aerobic granular sludge based on the NaCl concentration increasing mode, the steps are as follows:

[0034] (1) Preparation of simulated domestic sewage: Prepare simulated domestic sewage so that the concentration of ammonia nitrogen in the sewage is 50 mg / L; COD Cr The concentration is 500mg / L, MgSO 4 ·7H2 O concentration is 25mg / L; FeSO 4 ·7H 2 0 concentration is 25mg / L; CaCl 2 The concentration is 60mg / L; KH 2 PO 4 The concentration is 10mg / L; FeCl 3 ·6H 2 O concentration is 1.5mg / L; EDTA concentration is 20mg / L; KCl concentration is 40mg / L, H 3 BO 3 The concentration is 0.15mg / L; ZnCl 2 Concentration is 0.12mg / L; KI concentration is 0.03mg / L; CuSO 4 ·5H 2 O concentration is 0.03mg / L; NaMoO 4 2H 2 O concentration is 0.15mg / L; CoCl 2 ·6H 2 O concentration is 0.058mg / L; MnCl 2 4H 2 O concentration is 0.12mg / L; Na 2 MoO 4 4H 2 O concentration is 0.15mg / L, with NaHCO 3 Adjust the pH at 7.5 to 8.5,

[0035...

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Abstract

The invention relates to a method for accelerating the cultivation of aerobic granular sludge based on the method of increasing the NaCl concentration. In the method, an inner pipe is installed inside the sequencing batch batch reactor, and the method of continuously increasing the NaCl concentration when entering water is adopted to make the inside of the reactor The aggregate performance and hydrophobic performance of the sludge increased significantly, and the particle size increased exponentially. The sequence batch reactor operates in the manner of water intake-aeration-sedimentation-drainage, and each operation cycle is 4 hours. The invention can significantly accelerate the formation of aerobic granular sludge at lower temperature, shorten the time for complete granulation of flocculent activated sludge to 20-25 days, and solve the problem of too long cultivation time of existing aerobic granular sludge. The aerobic granular sludge obtained by this method has good stability, high strength, and is resistant to COD Cr And ammonia nitrogen have a higher removal rate.

Description

technical field [0001] The invention relates to a method for accelerating the cultivation of aerobic granular sludge based on the method of increasing NaCl concentration, and belongs to the field of microorganism cultivation. Background technique [0002] Granular sludge is a special biofilm of microbial self-agglomeration found in sewage treatment, which can be divided into aerobic granular sludge and anaerobic granular sludge. The research on aerobic granular sludge began in 1991. Aerobic granular sludge has the characteristics of stable structure, compact structure, biological compactness, high biotransformation efficiency, good settling performance, and strong resistance to toxic compounds. Aerobic granular sludge has high biomass concentration and denitrification and phosphorus removal functions. Compared with the traditional activated sludge method, it can simplify the process flow, reduce the volume and floor area of ​​the sewage treatment system, and reduce investmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N1/36C02F3/12
CPCC02F3/12C02F2305/06Y02W10/10
Inventor 王新华李嘉序高明明
Owner SHANDONG UNIV
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