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Granular sludge preparation method and reactor

A granular sludge and reactor technology, applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc., can solve the problem of slow growth of granular sludge, long formation period, difficult anaerobic granular sludge and aerobic granular sludge to efficiently remove nitrogen and phosphorus to achieve the effect of improving the preparation and formation efficiency, strengthening the flocculation ability, and shortening the formation cycle

Active Publication Date: 2022-04-29
万创青绿(北京)环境科技有限公司 +2
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The embodiment of the present invention aims at the slow growth of the above-mentioned existing granular sludge preparation, the long formation cycle and the difficulty in realizing the joint and efficient denitrification and phosphorus removal of anaerobic granular sludge and aerobic granular sludge, and maintaining the long-term denitrification and phosphorus removal treatment. To solve the problem of stable cycle operation, provide a granular sludge preparation method and reactor

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  • Granular sludge preparation method and reactor
  • Granular sludge preparation method and reactor
  • Granular sludge preparation method and reactor

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preparation example Construction

[0034] Such as figure 1 , 2 Shown is a schematic view of the structure of the reactor provided in the embodiment of the present invention and a flow chart of the granular sludge preparation method. The granular sludge preparation method can be applied to the field of environmental protection, especially in the wastewater treatment of farms. The granular sludge preparation method in the present embodiment comprises the following steps:

[0035] S11: In the reactor (such as figure 1 The inlet 101 of the anaerobic zone 1 (providing a relatively closed and anaerobic environment) of the shown reactor) is added to the wastewater to be purified (such as pig farm pig wastewater), and the above-mentioned wastewater to be purified is filled with the entire anaerobic zone 1 , and then start the stirring device 11 in the anaerobic zone 1, and the wastewater to be purified in the anaerobic zone 1 is stirred by the stirring device 11.

[0036] In the specific operation, the stirring spee...

Embodiment 1

[0057] In this embodiment can be used figure 1 The bioreactor shown is initially inoculated with fresh flocculent sludge and non-granular sludge from the secondary sedimentation tank of the domestic sewage treatment plant.

[0058] The formation process of the flocculation-enhanced granular sludge in this example is as follows: firstly, inject and fill the anaerobic zone 1 with pig-raising wastewater (COD: 9845mg / L, water temperature: 24°C, inflow velocity: 0.1m / h) in Henan , then start the stirring device 11, make its stirring speed be 60rpm, add the mixed solution of chitosan flocculant and flocculated sludge while stirring, and make the chitosan flocculant and flocculation in the waste water in the anaerobic zone 1 The mixed concentration of sludge is 2500mg / L. Then, gradually reduce the speed of the stirring device 11 until it stops in 10 minutes. After standing for 3 hours, start the stirring device 11 again to stir, and keep the stirring device 11 at a stirring speed of...

Embodiment 2

[0063] In this embodiment, it is also possible to use figure 1 The bioreactor shown is initially inoculated with fresh flocculent sludge and non-granular sludge from the secondary sedimentation tank of the domestic sewage treatment plant. That is, the flocculant is a microbial flocculant.

[0064]The formation process of flocculation-enhanced granular sludge in this example is as follows: First, the sewage (COD: 6325mg / L, water temperature: 22°C, inflow velocity: 0.1m / h) from a chicken farm in Henan was injected into and filled with anaerobic zone 1, then start the stirring device 11, make its stirring speed be 40rpm, stir and add the mixed solution of microbial flocculant (flocculant prepared by the product produced by microbial metabolism) and flocculated sludge at the same time, and make the anaerobic zone 1 The mixed concentration of microbial flocculant and flocculent sludge in wastewater is 3200mg / L. Then gradually reduce the speed of stirring device 11 in 10 minutes u...

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Abstract

The invention provides a granular sludge preparation method and a reactor. The granular sludge preparation method includes adding wastewater to be purified in an anaerobic zone of the reactor, and stirring the anaerobic zone by a stirring device; The mixed solution of flocculant and flocculent sludge is added to the anaerobic zone, so that the mixed concentration MLSS of the anaerobic zone is 2500-3200 mg / L, and the stirring speed of the stirring device is gradually reduced until it stops; In the mixed liquid of the flocculent sludge, the mass ratio of the flocculant to the flocculent sludge is 1:0.8-0.3:1; the anaerobic zone is stirred again by the stirring device, and the mixture of the flocculant and the flocculent sludge is added again. mixed solution to increase the mixed concentration of MLSS in the anaerobic zone by 500-800 mg / L; repeat the previous step until the sludge settling ratio SV in the anaerobic zone 30 : SV 5 Less than or equal to 1:1.2, the preparation of the granular sludge is completed. By adding the mixed solution of the flocculant and the flocculent sludge, the present invention can strengthen the flocculation ability of the wastewater, accelerate the sludge granulation process, and improve the preparation and formation efficiency.

Description

technical field [0001] The embodiments of the present invention are designed in the field of environmental protection, and more specifically, relate to a method for preparing granular sludge and a reactor. Background technique [0002] Activated sludge method is an aerobic biological treatment method commonly used in water treatment technology. At present, in order to improve its treatment efficiency and reduce energy consumption, a series of treatment processes have been gradually developed, including sequential batch activated sludge method (SBR), cycle activated sludge process (CASS), oxidation ditch process, biofilter method and membrane bioreactor, etc. However, the above-mentioned water treatment processes are still based on the flocculent sludge used in the traditional activated sludge process, and due to the low density and high water content of the flocculent sludge, the floor area of ​​the existing water treatment process is limited by the limitation of the floccul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F101/10C02F101/16
CPCC02F3/30C02F2101/16C02F2101/105C02F2303/24
Inventor 李海波黎昌汉杨伟明王广志谭宇昂
Owner 万创青绿(北京)环境科技有限公司
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