Aerobic granular sludge with strengthened inner core and strengthened framework, and culture method thereof

A technology of aerobic granular sludge and cultivation method, which is applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc., can solve the problem of unstable aerobic granular sludge, etc. To achieve the effect of short culture period, strong stability and enhanced strength

Pending Publication Date: 2021-04-06
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Recent studies have shown that the formation of aerobic granular sludge can be accelerated by adding activated carbon particles, zeolite particle

Method used

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  • Aerobic granular sludge with strengthened inner core and strengthened framework, and culture method thereof
  • Aerobic granular sludge with strengthened inner core and strengthened framework, and culture method thereof
  • Aerobic granular sludge with strengthened inner core and strengthened framework, and culture method thereof

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Experimental program
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Example Embodiment

[0025]Example 1

[0026]In the reactor (high diameter ratio of 10: 1), the active sludge 5400mg / L and microcarriers are 200,000 / L, the control reaction temperature is 25 ° C, pH = 7.5 ~ 8.5, the aeration stage surface is 0.8cm / S, DO≥4.0mg / L. The sequence batch period is 6 h, where the water was intravasion, stirred at anaerobic stirring for 2 h, aerated for 2 h, and the oxygen is stirred for 1 h for ~ 1H 47 min, precipitation of 30 to 3 min, drainage and idle for 5 min. Cultivation was carried out by artificially configured municipal sewage (ammonia nitrogen is 60 ~ 70mg / L, TP of 4 to 6 mg / L, COD is 250 ~ 320mg / L), on day 25, particle sludge having a particle size of 200 um in the reactor The main body of the reactor, the particle size is between 0.6 to 1.0 mm, has good settling resistance, COD, ammonia nitrogen removal rate of 90%, and the removal rate of total nitrogen is above 75%.

Example Embodiment

[0027]Example 2

[0028]In the reactor (high diameter ratio of 10: 1), the active sludge 4000mg / L and microcarriers are 25,000 / L, the control reaction temperature is 25 ° C, the surface is 1.0 cm / s, DO ≥ 4.0mg / L , PH = 7.5 ~ 8.5. The order period was 8 h, in which water was stirred for 5 min, anaerobic stirring for 2 h, an aerated 2.5 h, and the oxygen stirring was stirred for 2 h, and 30 to 3 min, drainage and idle for 5 min. Cultivation was carried out by artificially configured municipal sewage (ammonia nitrogen is 60 ~ 70mg / L, TP of 4 to 6 mg / L, COD of 250 ~ 320mg / L), on day 27, particle sludge having a particle size of more than 200 um in the reactor The main body of the reactor, the particle size is between 0.5 and 1.7 mm, has good settling resistance, COD, ammonia nitrogen removal rate of 90%, and the total nitrogen removal rate is above 75%.

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Abstract

The invention discloses aerobic granular sludge with a reinforced inner core and a reinforced framework, and a culture method thereof, belonging to the technical field of sewage treatment methods. According to the invention, a microcarrier is added into a common activated sludge sewage treatment system for culture to obtain aerobic granular sludge with the reinforced inner core and the reinforced framework. Thus, the culture period of the aerobic granular sludge is shortened; and the problem of instability of the aerobic granular sludge in a long-term operation process is solved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment methods, and in particular relates to an aerobic granular sludge with strengthened inner core and skeleton and a cultivation method thereof. Background technique [0002] Aerobic granular sludge (aerobic granular sludge) is formed by microbial self-flocculation, which has the advantages of good settling property, large biomass, and strong impact load resistance. Due to the unique structure of aerobic granular sludge, there are different redox environments inside it, from internal anaerobic, anoxic in the middle to external aerobic, which allows the presence of non-functioning particles in aerobic granular sludge. Therefore, it is possible to achieve simultaneous denitrification, decarburization and phosphorus removal in the aerobic granular sludge process. Since the aerobic granular sludge process was developed, it is considered to be one of the most promising new treatment technologies ...

Claims

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Application Information

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IPC IPC(8): C02F3/10
CPCC02F3/104C02F3/108C02F3/109C02F2203/004Y02W10/10
Inventor 李军梁东博李东岳丁凡吴耀东张晶李培麟
Owner BEIJING UNIV OF TECH
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