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Process for high performance treatment of organic sewage and reduction of excess sludge output

A technology for excess sludge and organic wastewater, which is applied in the field of biological technology to treat sewage, can solve the problems of insignificant sludge reduction effect, alarming dosage, environmental safety and other problems, so as to reduce the cost of sewage treatment and sludge treatment and disposal. , Improve the effect of sewage purification and realize the effect of automatic control

Inactive Publication Date: 2006-12-27
B TOHIN MACHINE JIANGSU
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  • Abstract
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Problems solved by technology

However, there are the following problems in practical application: the uncoupling agent cast is degraded due to the domestication of microorganisms after a long time, thus losing the uncoupling effect; after adding the uncoupling agent, more oxygen is needed to deoxidize The organic matter that cannot be converted into sludge increases the oxygen supply; the cost of adding an uncoupling agent is expensive, and the concentration that needs to be maintained in the sewage is 4-80 mg / l, which is an astonishing amount; the uncoupling agent is usually Compounds that are difficult to biodegrade or have high toxicity to organisms have environmental safety problems
In the conventional activated sludge process, micro-animals and bacteria coexist in the aeration tank, and the operating conditions of the aeration tank are mainly conducive to bacteria and other microorganisms to swallow organic matter, which is not completely suitable for the growth of higher micro-animals that can prey on bacteria. The sludge reduction effect is not obvious

Method used

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  • Process for high performance treatment of organic sewage and reduction of excess sludge output
  • Process for high performance treatment of organic sewage and reduction of excess sludge output
  • Process for high performance treatment of organic sewage and reduction of excess sludge output

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Experimental program
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Effect test

specific Embodiment approach 1

[0015] Specific implementation mode one: combine figure 1 , this embodiment uses biological predation to reduce the amount of excess sludge according to the following method:

[0016] 1. First, the raw sewage is lifted to a certain height by the lifting pump station to meet the water head required for the subsequent section to rely on gravity flow.

[0017] 2. Grille: It is used to intercept large suspended or floating objects, such as plastic products, fiber scraps, hair, wood chips, fruit peels, vegetables, etc., so as to reduce the load of subsequent processing structures and make them operate normally.

[0018] 3. Grit chamber: remove the dense sand and gravel particles in the sewage, such as silt, cinder, etc., to reduce the load of the primary sedimentation tank and improve the treatment conditions of the sludge treatment structure. The grit chamber can aerate the grit chamber Preliminary removal of organic matter attached to the particles.

[0019] 4. Primary sediment...

specific Embodiment approach 2

[0035] Embodiment 2: Taking raw water as restaurant sewage as an example, the concentration of influent organic matter (calculated as COD) is 600-1200 mg / L.

[0036] Such as figure 2 , when the biological predation method is used to treat restaurant sewage, in order to achieve the two purposes of reducing sludge and degrading organic matter, the reasonable HRT is 6 hours. Under this condition, the average COD removal rate is 90%, and the effluent COD value is less than 100mg / L, which meets the first-level discharge standard (GB28978-2002).

[0037] It can be seen from Table 1 that the organic matter in the raw water is mainly removed in the bacterial dispersion tank, and the removal rate exceeds 40%, while the removal rates of the primary, metazoan and large micro-animal growth tanks are all lower than 20%, and in turn reduce. The total COD removal rate of the system is about 90%.

[0038] R1 section removal rate

R2 section removal rate

R3 section removal ...

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Abstract

The invention discloses a disposing method of organic waste water and residual mud reducing method in the dirty water disposing domain through biological technology, which is characterized by the following: the effluent disposal technology contains first-grade physiochemical disposal, aerobic segment two-grade physiochemical disposal and mud separation of two sedimentation pools; the nourishing grade of aerobic segment is divided into the following four parts from junior to senior according to food chain: bacteria dispersing growing pool, protozoa growing pool, meteorology growing pool and large-scale micro-animal growing pool; the bacteria decompose organics and the protozoa, meteorology and large-scale micro-animal reduce mud quantity to assist to decompose organics. The invention can be applied in the urban effluent disposal and industrial effluent disposal, which reduces mud quantity.

Description

technical field [0001] The invention belongs to the field of sewage treatment by biological technology, and in particular relates to a method for purifying sewage by using biological predation and simultaneously reducing the output of excess sludge in the purification process. Background technique [0002] Activated sludge method is the most widely used sewage biological treatment method today, but at the same time, a large amount of residual sludge is produced by-product. At present, the treatment and disposal costs of excess sludge account for 25-40% of the total operating costs of sewage treatment plants. volume will increase substantially. Therefore, how to reasonably solve the sludge problem has become one of the current environmental protection problems to be solved urgently. [0003] Sludge treatment and disposal is to use appropriate technical measures to make sludge reuse or return to the natural environment in a form that does not damage the environment. At pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F3/32C02F3/30
Inventor 汪群慧艾恒雨石原和美菊池隆重谢维民
Owner B TOHIN MACHINE JIANGSU
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