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Aerobic granular sludge culture method and culture device

A technology of aerobic granular sludge and cultivation method, applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc. Unable to meet the standard and other problems, to achieve the effect of shortening the cultivation time

Pending Publication Date: 2019-10-15
CHONGQING RES ACAD OF ECO ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The current aerobic granular sludge reactor uses flocculent activated sludge as inoculation sludge, and the cultivation time of aerobic granular sludge is generally more than 3 months. There are many problems, such as the increase of operating costs, the quality of effluent water in the cultivation process cannot meet the standards, etc. Some enterprises use the method of adding inductive nuclei or divalent metal ions to speed up the granulation process of flocculent sludge, but the effect is not ideal

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  • Aerobic granular sludge culture method and culture device
  • Aerobic granular sludge culture method and culture device
  • Aerobic granular sludge culture method and culture device

Examples

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Embodiment 1

[0043]The mud cake after dehydration treatment in the sewage treatment plant is used as the inoculation sludge. The mud cake is yellowish brown, with a water content of 80%. After compression, the mud cake has a compact structure; the wastewater is taken from the sewage treatment plant regulating tank, and the COD of the wastewater is 500mg / L, total nitrogen 60mg / L, total phosphorus 6mg / L, suspended solids concentration 200mg / L, pH value 7.8, reactor height 1000mm, inner diameter 90mm, effective volume 3L, put inoculated sludge into the reactor Feed waste water into the reactor at the middle and back, air aerate for 24 hours, and then the reactor operates in the order of water intake-aeration-sedimentation-drainage, divided into 4 operation cycles every day, and each cycle runs for 6 hours. day, the water intake time is 6min, the aeration time is 337min, the aeration rate is 2L / min, the sedimentation time is 15min, the drainage time is 2min, and the water exchange rate is 50%....

Embodiment 2

[0047] The mud cake after dehydration treatment in the sewage treatment plant is used as the inoculation sludge. The mud cake is yellowish brown, with a water content of 85%. After compression, the mud cake has a compact structure; the waste water is taken from the sewage treatment plant regulating tank, and the COD of the waste water is 490mg / L, total nitrogen 62mg / L, total phosphorus 6mg / L, suspended solids concentration 320mg / L, pH value 8.2, reactor height 1000mm, inner diameter 90mm, effective volume 3L, put inoculated sludge into the reactor Feed waste water into the reactor in the middle and back, air-aerate for 22 hours, and then the reactor operates in the order of water intake-aeration-sedimentation-drainage, with 4 operating cycles per day. On the first to seventh days, the water intake time is 5min, the aeration time is 337min, the aeration rate is 5L / min, the settling time is 15min, the drainage time is 3min, and the water exchange rate is 50%. On the 7th day, aer...

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Abstract

The invention relates to an aerobic granular sludge culture method. The method comprises the following steps: placing inoculated sludge into a reactor, introducing wastewater into the reactor, and carrying out aeration treatment for 20-25 hours; and then periodically operating the reactor according to the sequence of water feeding, aeration, precipitation and water discharging until mature aerobicgranular sludge is formed. The water inlet time is 5-8 min, the aeration time is 337-347 min, the sedimentation time is 5-15 min, and the drainage time is 2-3 min. The culture method of the aerobic granular sludge can effectively shorten the culture time of the aerobic granular sludge. The invention also relates to an aerobic granular sludge culture device capable of operating the aerobic granular sludge culture method.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an aerobic granular sludge cultivation method and a cultivation device in the sewage treatment process. Background technique [0002] Compared with traditional activated sludge, aerobic granular sludge has the following advantages: (1) compact structure, can resist toxic and harmful substances, has good settling performance, high microbial concentration, and can withstand the impact of high organic load and water quality fluctuations (2) Aerobic granular sludge is composed of a variety of microorganisms with different functions, and has the ability to simultaneously remove nitrogen and phosphorus. [0003] The current aerobic granular sludge reactor uses flocculent activated sludge as inoculation sludge, and the cultivation time of aerobic granular sludge is generally more than 3 months. There are many problems, such as increased operating costs, and the quality of effl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12
CPCC02F3/12Y02W10/10
Inventor 封丽姚源张勇张晟陈婷婷吴进潘江
Owner CHONGQING RES ACAD OF ECO ENVIRONMENTAL SCI
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