Method for cultivating aerobic short-cut nitrification granular sludge for treating domestic sewage

A technology of aerobic granular sludge and cultivation method, applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc., can solve the problems of low operation efficiency, reduced floor space, unstable nitrosation, etc. , to achieve the effect of increasing the proportion, solving the poor settlement performance, and having a broad market application prospect

Active Publication Date: 2009-09-16
BEIJING DRAINAGE GRP CO LTD
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Problems solved by technology

[0006] The object of the present invention is to provide a kind of cultivation method and fuzzy control device and method thereof for treating domestic sewage nitrosation aerobic granular sludge, thereby improve ammonia oxidizing bacteria content, inhibit the growth of nitrite nitrogen oxidizing bacteria, increase volume load, shorten Nitrification reaction time, reduce cost; greatly improve the settling performance of sludge, shorten settling time, reduce floor area; solve the problems of time program control, low operating efficiency, and unstable nitrosation in the existing sewage treatment system

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  • Method for cultivating aerobic short-cut nitrification granular sludge for treating domestic sewage
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  • Method for cultivating aerobic short-cut nitrification granular sludge for treating domestic sewage

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Embodiment 1

[0036] 1. Cultivation of nitrosated aerobic granular sludge for treatment of domestic sewage

[0037] Such as figure 1 As shown, the SBR reactor for culturing nitrosated aerobic granular sludge is cylindrical, with a diameter of 9cm, an effective height of 90cm, a height-to-diameter ratio of 10, and a total effective volume of 6L. It is made of plexiglass. The drain pipe 6 is located under the reactor. / 3 places, the volume exchange rate is 67%. The temperature sensor 14, the temperature measuring instrument 17, the actuator 21 and the heating device 28 are used to regulate the water temperature at 25±1°C. The surplus sludge discharged from the secondary sedimentation tank of a municipal sewage treatment plant is loaded into the SBR reactor as seed sludge; the raw water is the actual domestic sewage discharged from a living quarter, with COD of 200-350mg / L, NH 4 + -N is 50~85mg / L, pH is 7.4~7.8, alkalinity (with CaCO 3 Calculated) The average value is 380mg / L. The operation mode...

Embodiment 2

[0064] 1. Cultivation of nitrosated aerobic granular sludge for treatment of domestic sewage

[0065] Such as Figure 4As shown, the SBAR reactor for culturing nitrosated aerobic granular sludge is cylindrical, with an outer cylinder diameter of 9cm, an inner cylinder diameter of 5cm, a bottom clearance area of ​​15cm, an effective height of 90cm, an aspect ratio of 10, and a total effective volume of 6L. , Made of organic glass, drain pipe 6 is located at the bottom 1 / 3 of the reactor, and the volume exchange rate is 67%. The temperature sensor 14, the temperature measuring instrument 17, the actuator 21 and the heating device 29 are used to regulate the water temperature at 25±1°C. The surplus sludge discharged from the secondary sedimentation tank of a municipal sewage treatment plant is used as seed sludge into the SBAR reactor; the raw water is the actual domestic sewage discharged from a living quarter, with COD of 200-350mg / L, NH 4 + -N is 50~85mg / L, pH is 7.4~7.8, alkalini...

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Abstract

The invention relates to a method for cultivating aerobic short-cut nitrification granular sludge for treating domestic sewage, which is characterized in that an SBR reactor adopts ratio of height to diameter of 1.8-10 and volume exchange rate of 50-67%; the sedimentation time is 30-50min, which is gradually shortened to 3min, or the sedimentation time is set as 5-8min. In the process of biochemical reaction, dissolved oxygen (DO) and pH value are regarded as real-time control parameters; aeration time is controlled according to the fuzzy control rule; nitrification is controlled to stop on the short-cut nitrification stage. The method can increase the content of ammonia oxidizing bacteria and volume load, shorten nitration reaction time, improve the sedimentation property of the sludge by a wide margin, shorten sedimentation time, narrow the floor area of the reactor and solve the problems of low operating efficiency and unstable nitrosification caused by time program control of the sewage treatment system. The aerobic short-cut nitrification granular sludge prepared by the invention is suitable for treating high-concentration ammonia nitrogen wastewater with low COD and is a biological wastewater treatment technology with broad market prospect.

Description

Technical field [0001] The invention relates to a culturing method for treating domestic sewage nitrosated aerobic granular sludge and a fuzzy control device and method thereof, belonging to the technical field of sewage biological treatment. Background technique [0002] With the development of industrial and agricultural production and the improvement of people's living standards, nitrogen pollution has intensified, not only causing eutrophication of water bodies, but also seriously disrupting the aquatic ecosystem. In the latest "Emission Standard of Pollutants for Urban Sewage Treatment Plants" (GB18918-2002) promulgated in 2002, my country requires that the effluent of all urban sewage treatment plants be discharged into rivers with small dilution capacity as urban landscape water and general reuse water. Implement the A standard of the primary standard, namely TN<15mg / L, NH 4 -N<5mg / L (<8mg / L when the water temperature is lower than 12℃). At present, almost all urb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/20C02F3/12
CPCY02W10/10
Inventor 高景峰陈冉妮彭永臻苏凯张倩
Owner BEIJING DRAINAGE GRP CO LTD
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