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Rapid culture method of aerobic granular sludge

A technology of aerobic granular sludge and cultivation method, applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc., can solve poor operability, complicated operation steps, and low practical application value And other issues

Inactive Publication Date: 2011-10-19
FUDAN UNIV
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Problems solved by technology

This has become one of the bottlenecks that limit the further development of aerobic granular sludge into practical applications.
In previous studies, it was found that more calcium ions (Ca 2+ ) can strengthen the formation of granular sludge to shorten the incubation time, but this cultivation method still takes about 16 days
Although the method of adding pure bacteria with self-aggregation ability to the activated sludge can further strengthen the formation of particles, this method can be used to cultivate aerobic granular sludge with an average particle size of 446um in 8 days, but in practical applications In this method, a large number of pure-bred bacterial cultures need to be carried out first, the operation steps are complicated, the success rate is difficult to guarantee, the operability is poor, and the practical application value is low.

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  • Rapid culture method of aerobic granular sludge
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  • Rapid culture method of aerobic granular sludge

Examples

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Embodiment 1

[0026] Example 1: Using synthetic wastewater to cultivate aerobic particles in the laboratory

[0027] Materials and methods

[0028] Reactor start

[0029] The sludge comes from a general municipal sewage treatment plant, and enters the reactor after 4 days of domestication with artificially synthesized distribution water. The working volume of the reactor is 2.0L, and it runs periodically in a sequential batch mode. Synthetic sewage is pumped into the reactor through the water inlet at the bottom of the reactor, and the water inlet time is 5 minutes per cycle. Aeration is realized through the air pump through the bottom of the reactor, and the reactor performs biochemical reactions. After the aeration is stopped, the reactor system enters the settling phase. With a shorter settling time of 5 minutes, the sludge with good settling properties can be retained in the reactor. The effluent after the reaction is discharged through the water outlet located in the middle of the...

Embodiment 2

[0038] Example 2: Rapid cultivation of aerobic granular sludge using urban sewage in a pilot-scale reactor

[0039] The ultimate goal of the research on aerobic granular sludge is to realize the practical application of aerobic granular sludge. But so far, the research on aerobic granular sludge is generally based on laboratory-scale cultivation, and there are few researches on pilot scale or above the actual situation. At the same time, there are more factors affecting the cultivation of aerobic granular sludge in the pilot scale or above, so the cultivation time required for the pilot scale or above is often longer than that in the laboratory. At present, in the reported examples of pilot-scale cultivation of aerobic granular sludge, the time required for the cultivation and start-up of granular sludge is sometimes as long as more than one year, which has brought great benefits to the further practical application and promotion of aerobic granular sludge. big difficulty. T...

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Abstract

Belonging to the technical field of biological wastewater treatment, the invention specifically relates to a rapid culture method of aerobic granular sludge. The method comprises the steps of: inoculating activated sludge in a sequencing batch reactor; pumping waste water into the reactor through a water inlet at the bottom of the reactor; conducting an aeration operation through an aeration device located at the bottom of the reactor; setting a precipitation time and bringing the reactor into a precipitation process; discharging the waste water above a water outlet out of the reactor by a drainage pump. Wherein, with a precipitation time longer than 0 but shorter than 15 minutes and an organic loading higher than 1.5g 1<-1> d<-1>, the steps between water inletting and water discharging repeat periodically in the reactor. The operation period may range from 0.5-12 hours, the time for water inletting and water discharging may be in a range of from 1 to 120 minutes, and the aeration intensity can be 0.1-5vvm. The method of the invention can effectively shorten the culture time of granular sludge, and the aerobic granular sludge generated by the rapid culture method enjoys a capability to maintain long-term stable operation.

Description

technical field [0001] The invention belongs to the technical field of wastewater biological treatment, and in particular relates to a rapid cultivation method of aerobic granular sludge. Background technique [0002] Activated sludge method is currently widely used sewage biological treatment technology, but the traditional activated sludge method often has poor treatment effect, poor settling performance affects the quality of effluent water, and is prone to sludge bulking and other problems. Aerobic granular sludge is a new type of high-efficiency biological treatment technology for sewage that has emerged in recent years. Compared with the traditional activated sludge process, the aerobic granular sludge technology has better settling performance, higher biomass retention (sludge concentration) in the reactor, higher treatment capacity, and treatable sewage There are more types, stronger resistance to adverse environments and excellent application prospects. [0003] C...

Claims

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Application Information

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IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 郑俊华刘永强
Owner FUDAN UNIV
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