Sewage treatment method for inhibiting activated sludge bulking

A sewage treatment method and sludge bulking technology, applied in water/sludge/sewage treatment, biological water/sewage treatment, chemical instruments and methods, etc., can solve problems such as turbidity of effluent, harm to biochemical systems, high occurrence rate, etc., to achieve Ensure normal operation, inhibit growth and reproduction, and ensure stability

Active Publication Date: 2021-01-26
中原环保股份有限公司
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  • Abstract
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Problems solved by technology

A large amount of sludge is lost and the effluent is turbid; the secondary settling tank is difficult to separate solid and liquid, sometimes accompanied by the generation of a large amount of biological foam, which cannot maintain the normal operation of the biochemical treatment unit
Sludge bulking is one of the more serious abnormal phenomena in the biochemical treatment system. It directly affects the effluent quality and endangers the operation of the entire biochemical system. long time to adjust

Method used

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  • Sewage treatment method for inhibiting activated sludge bulking

Examples

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Embodiment 1

[0040] Embodiment 1: the sewage treatment method that suppresses activated sludge bulking, see figure 1 , the sewage treatment system used includes a biological pool 1, an electromagnetic flowmeter 5 is provided on the water inlet pipe of the biological pool 1, a sludge concentration meter 6 and an online dissolved oxygen meter 7 are arranged in the biological pool 1, and the online dissolved oxygen meter 7 is equipped with There is a temperature probe; the effluent of biological pool 1 is connected to distribution well 8, and water distribution well 8 distributes the effluent of biological pool to secondary settling tanks 2 and 3 equally; ultrasonic mud level interface instruments are installed in secondary settling tanks 2 and 3.

[0041] The sludge in the secondary settling tanks 2 and 3 is introduced into the excess sludge tank 4 in the excess sludge pump room. The excess sludge pump group and the external return pump group are installed in the excess sludge tank 4. The exc...

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Abstract

The invention discloses a sewage treatment method for inhibiting activated sludge bulking. An adopted sewage treatment system comprises a biological tank, effluent of the biological tank is communicated to a water distribution well, and the water distribution well averagely distributes the effluent of the biological tank into two secondary sedimentation tanks; sludge in the secondary sedimentationtank is introduced into a residual sludge tank in the residual sludge pump room, and a residual sludge pump set and an outer reflux pump set are mounted in the residual sludge tank; a composite agentadding device is arranged beside a biological tank, a sodium hypochlorite agent adding device is arranged beside a residual sludge pump room, and the method for inhibiting activated sludge bulking comprises the steps of adjusting the sludge concentration, adjusting the water inlet amount, inhibiting microthrix sludge bulking and inhibiting nocardia sludge bulking. Sludge bulking caused by microthrix parvicella and nocardia in the sewage treatment process can be effectively inhibited, the occurrence rate of sludge bulking is reduced, the influence of sludge bulking on the sewage treatment efficiency and effluent quality is avoided, and the normal operation of a sewage treatment biological treatment system is ensured.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a sewage treatment method for inhibiting the expansion of activated sludge. Background technique [0002] Sludge bulking refers to the phenomenon that the sludge structure is extremely loose, the volume increases, floats up, and it is difficult to settle and separate, which affects the quality of effluent water. Microthrix swelling is the main cause of activated sludge swelling in northern sewage treatment plants in winter. Microthrix is ​​a kind of actinomycetes, the length can reach 200μm, the mycelium is curved, and can hover in the whole mycolloid. When a large number of Microthrix multiply, it will cause the sludge to expand. Nocardia bulking is the main cause of activated sludge bulking in sewage treatment plants in summer. Nocardia is mostly bacillus, the length is generally 3-4μm, and the hyphae are dendritic. When the water temperature is high in summer, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12
CPCC02F3/1215Y02W10/10
Inventor 周鹏和笑天邱绍龙杨丽亚李鹏飞曹莎莎韩翰蒋晚霞罗鹏李海涛马世凯廖丹丹
Owner 中原环保股份有限公司
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