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Integrative aerobic particle sludge membrane bioreactor sewage treatment method

A technology of aerobic granular sludge and membrane bioreactor, which is applied in the direction of sustainable biological treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve rare problems, achieve ease of accumulation and stable operation , The effect of simple process

Inactive Publication Date: 2008-01-09
INST OF HYGIENE & ENVIRONMENTAL MEDICINE PLA ACAD OF MILITARY MEDICAL
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, as mentioned above, many studies on the regulation of microbial morphology and sludge properties still use external substances to improve sludge performance, and truly seek the most suitable microbial aggregate characteristics for membrane bioreactors by directly regulating the growth characteristics of microorganisms themselves. research is still rare

Method used

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  • Integrative aerobic particle sludge membrane bioreactor sewage treatment method

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Embodiment 1

[0029] The effective volume of the reactor is 10 liters, the volume of the precipitation zone is 1 liter, the temperature is controlled at 20-25°C, the MLSS is controlled at 5000-7000 mg / L, and the sludge age is 40 days. Using artificial water distribution with sodium acetate as the organic matrix, the concentration in terms of COD is 200-400mg / L, ammonia nitrogen is 30-40mg / L, and total nitrogen is 35-50mg / L. The particle size of inoculated aerobic granular sludge is 800-1800 microns. The water outlet time of the membrane is 7 to 14 minutes, and the precipitation water outlet time is 3 to 6 minutes, alternately. The reactor runs continuously for 60 days without any hydraulic and chemical cleaning of the membrane components. The organic matter, ammonia nitrogen and total nitrogen in membrane effluent water are 5-10mg / L, 1-3mg / L, 2-5mg / L respectively; L, 5~10mg / L. And the aerobic granular sludge with a sludge particle size greater than 400 microns in the reactor accounts for...

Embodiment 2

[0031] The effective volume of the reactor is 8 liters, the temperature is controlled at 20-25°C, the MLSS is controlled at 4000-6000 mg / L, and the sludge age is 50 days. Using the effluent from the primary sedimentation tank of a city sewage treatment plant, the COD concentration is 150-200mg / L, the ammonia nitrogen is 30-40mg / L, and the total nitrogen is 40-50mg / L. The particle size of inoculated aerobic granular sludge is 800-1800 microns. The water outlet time of the membrane is 8 to 16 minutes, and the precipitation water outlet time is 2 to 4 minutes, alternately. The reactor has been running continuously for 80 days without any hydraulic and chemical cleaning of the membrane components. The organic matter, ammonia nitrogen and total nitrogen in membrane effluent water are 5-10mg / L, 1-3mg / L, 2-5mg / L respectively; L, 5~10mg / L. And the aerobic granular sludge with a sludge particle size greater than 400 microns in the reactor accounts for more than 85% of the total slud...

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Abstract

This invention discloses a method for treating wastewater by using integrated aerobic granular sludge membrane biological reactor. Said reactor comprises a reaction pond, in which are placed baffle plates (vertically placed plates and inclined placed plates). The above mentioned plates separate the reaction pond into a reaction zone and a settling zone. In the settling zone, on the side wall of reaction pond is equipped with an effluent outlet tube. In the lower middle part of reaction zone is equipped with an aerator. Above the aerator are placed membrane elements, which are then connected with effluent outlet tube and sucking pump. The operation procedures are: continuously feeding wastewater, feeding aerobic granular sludge into the biological reactor, controlling the temperature, proceeding the biological reaction. This invention has advantages of: simple treatment process, high treatment efficiency, stable operation, obtaining effluent water with the need requirement, long service life of membrane elements, low investment and energy-saving.

Description

technical field [0001] The invention relates to a method for treating sewage, in particular to a method for treating sewage with an aerobic granular sludge membrane bioreactor. Background technique [0002] Membrane bioreactor (Membrane bioreactor, MBR), as an efficient and compact treatment technology, has been widely researched and applied in the field of sewage treatment and reuse, but in practical applications, problems such as insufficient denitrification capacity and serious membrane fouling still exist. It is an outstanding problem restricting the further development of MBR. Membrane fouling control mainly includes the improvement of membrane material, the optimization of operating conditions and the improvement of the characteristics of the sludge mixture. Since the microbial flocs and most of the macromolecular organic matter in the sludge mixture cannot pass through the membrane, the activated sludge in the membrane The formation of fouling layers accumulated on t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F1/44
CPCY02W10/10
Inventor 王景峰李君文王暄陈照立金敏谌志强邱志刚王新为尹静
Owner INST OF HYGIENE & ENVIRONMENTAL MEDICINE PLA ACAD OF MILITARY MEDICAL
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