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: 2019-12-10
万创青绿(北京)环境科技有限公司 +2
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  • Abstract
  • Description
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  • Application Information

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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 are the structural schematic diagram of the reactor and the flow chart of the granular sludge preparation method provided by the embodiments of the present invention. The granular sludge preparation method can be applied to the field of environmental protection, especially in the wastewater treatment of farms. The preparation method of granular sludge in this embodiment includes the following steps:

[0035] S11: In the reactor (e.g. figure 1 The inlet 101 of the anaerobic zone 1 (providing a relatively closed and oxygen-free environment) of the reactor shown is added to the wastewater to be purified (such as pig farm wastewater), and the wastewater to be purified is filled in the entire anaerobic zone 1 Then, the stirring device 11 in the anaerobic zone 1 is started, and the waste water to be purified in the anaerobic zone 1 is stirred by the stirring device 11.

[0036] In the specific operation, the stirring speed of the stirring device 11 in th...

Embodiment 1

[0057] Can be used in this embodiment figure 1 The bioreactor shown is inoculated with fresh flocculent sludge and non-granular sludge from the secondary sedimentation tank of the domestic sewage treatment plant at the initial start-up.

[0058] The formation process of flocculation-enhanced granular sludge in this embodiment is as follows: First, a certain pig wastewater (COD of 9845mg / L, water temperature of 24°C, and water flow rate of 0.1m / h) in Henan is injected and filled with anaerobic zone 1. , And then start the stirring device 11 to make the stirring speed 60rpm, while stirring, add the mixture of chitosan flocculant and flocculent sludge, and make the chitosan flocculant and flocculant in the wastewater in the anaerobic zone 1 The mixed concentration of sludge is 2500mg / L. Then, gradually reduce the speed of the stirring device 11 within 10 minutes until it stops. After standing for 3 hours, start the stirring device 11 again to stir, and keep the stirring device 11 at...

Embodiment 2

[0063] The same can be used in this embodiment figure 1 The bioreactor shown is inoculated with fresh flocculent sludge and non-granular sludge from the secondary sedimentation tank of the domestic sewage treatment plant at the initial start-up. That is, the flocculant is a microbial flocculant.

[0064] The flocculation-enhanced granular sludge formation process in this example is as follows: First, the sewage (COD of 6325mg / L, water temperature of 22°C, and inlet water flow rate of 0.1m / h) from a chicken farm in Henan is injected and filled into the anaerobic zone 1. Then start the stirring device 11 to make the stirring speed 40rpm, while stirring, add the mixture of microbial flocculant (flocculant prepared by the product of microbial metabolism) and flocculent sludge, 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 the stirring device 11 within 10 minutes until ...

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Abstract

The invention provides a granular sludge preparation method and a reactor. The granular sludge preparation method comprises the steps that to-be-purified waste water is added into an anaerobic zone ofthe reactor, and the anaerobic zone is stirred through a stirring device; mixed liquid of a flocculating agent and flocculent sludge is added into the anaerobic zone, thus the mixing concentration MLSS of the anaerobic zone is 2500-3200 mg/L, and the stirring speed of the stirring device is decreased gradually till the stirring device stops; in the mixed liquid of the flocculating agent and the flocculent sludge, the mass ratio of the flocculating agent to the flocculent sludge is (1:0.8) to (0.3:1); the anaerobic zone is stirred again through the stirring device, the mixed liquid of the flocculating agent and the flocculent sludge is added again, and thus the mixing concentration MLSS of the anaerobic zone is increased by 500-800 mg/L; and the previous step is repeated till the sludge settling ratio SV30:SV5 in the anaerobic zone is less than or equal to 1:1.2, and the granular sludge is prepared. According to the preparation method, by adding the mixed liquid of the flocculating agent and the flocculent sludge, the flocculation ability of the waste water can be reinforced, the sludge granulation process is accelerated, and the preparation forming efficiency is improved.

Description

Technical field [0001] The embodiment of the present invention is designed in the field of environmental protection, and more specifically, relates to a method for preparing granular sludge and a reactor. Background technique [0002] The 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), cyclic activated sludge method (CASS), oxidation ditch process, biological filter 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 method. Due to the low density and high water content of the flocculent sludge, the existing water treatment process is limited by the flocculent sludge. Large, large amount of ...

Claims

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Application Information

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Patent Type & Authority Applications(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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