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Integrated inclined plate oxidation ditch sewage treatment device

A sewage treatment device and oxidation ditch technology, applied in water/sewage treatment, biological water/sewage treatment, water/sewage treatment equipment, etc., can solve the problems of low volume load, large floor area, high energy consumption in operation, and achieve Reduce the cost of pipeline installation, reduce the footprint of the device, and increase the effect of cycle power

Active Publication Date: 2021-06-01
清华苏州环境创新研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Although the traditional oxidation ditch process has the advantages of good treatment effect, stable operation, and strong impact load resistance, it needs low volume load and long sludge age as guarantees, which leads to large volume and occupied area of ​​the process. Large and energy-intensive to operate
[0005] 2. The effluent from the oxidation ditch undergoes solid-liquid separation in the secondary settling tank. The traditional flow type secondary settling tank or advection type secondary settling tank occupies a large area and is expensive, and the settled sludge needs to be returned to the oxidation ditch through the sludge return pump , increasing the cost of pipeline construction and equipment configuration
[0006] 3. The circulatory return power of the oxidation ditch generally comes from flow boosters, surface aerators, aeration brushes or turntables. These types of operation consume a lot of energy, and it is impossible to adjust the process parameters such as the circulatory return ratio of the oxidation ditch. Flexible regulation, unable to ensure the discharge of total nitrogen in the effluent is stable and up to standard

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  • Integrated inclined plate oxidation ditch sewage treatment device
  • Integrated inclined plate oxidation ditch sewage treatment device
  • Integrated inclined plate oxidation ditch sewage treatment device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, the plane of the integrated sloping plate oxidation ditch sewage treatment device is a circular structure, and the area of ​​the reciprocating circulating waterway based on the up / down flow direction is divided into: aerobic zone, sloping plate sedimentation zone, stripping zone, micro-oxygen zone, hypoxic zone.

[0034] Such as figure 2 As shown, the plane of the integrated sloping plate oxidation ditch sewage treatment device is a ring structure, and the plane layout is center-point symmetrical. Among them, it specifically includes: aerobic unit 110 , inclined plate sedimentation unit 120 , stripping unit 130 , anoxic unit 140 and anoxic internal circulation unit 210 .

[0035] The aerobic unit 110 is composed of a microporous aeration pan 11 , an aeration circulating fluidized bed upflow zone 2 , an aeration circulating fluidized bed downflow zone 3 and a steam upflow zone 5 .

[0036] The inclined plate sedimentation unit 120 is compos...

Embodiment 2

[0042] Such as figure 1 As shown, the upflow zone 2 of the aerated circulating fluidized bed and the downflow zone 3 of the aerated circulating fluidized bed in the aerobic unit 110 are kept in a circulating fluidized state under the aeration effect of the microporous aeration pan 11. The circulating fluidized state can perform good mixing and agitation on the bottom area of ​​the inclined plate sedimentation unit 120 to prevent sludge deposition. At the same time, the circulating fluidized bed can increase the relative flow velocity of solid and liquid, and improve the mass transfer rate.

[0043] The sloping plate sedimentation unit 120 is provided with a water upflow zone 4, which has a buffering effect and can effectively reduce the disturbance caused by the downflow zone 3 of the aerated circulating fluidized bed to the sloping plate settling zone 13, ensuring that the sloping plate settling zone 13 Good mud-water separation effect.

[0044] The slant plates in the slan...

Embodiment 3

[0052] Wastewater enters the integrated inclined plate oxidation ditch sewage treatment device through the first water inlet 18 or the second water inlet 19, and passes through the first anoxic upflow zone 7, the first anoxic downflow zone 8, the second anoxic downflow zone along the circulation direction of the oxidation ditch. The anoxic upflow zone 9 and the second anoxic downflow zone 1 enter the aerated circulating fluidized bed upflow zone 2 of the aerobic unit 110 .

[0053] The ammonia nitrogen in the wastewater undergoes nitrification reaction in the aerobic unit 110 to generate nitrate nitrogen, and at the same time, some organic pollutants are oxidized and decomposed. Most of the mixed solution flows back to the upflow zone 2 of the aerated circulating fluidized bed through the downflow zone 3 of the aerated circulating fluidized bed to participate in the fluidized bed circulation process, and a part of the mixed solution participates in the oxidation ditch under the...

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Abstract

The invention discloses an integrated inclined plate oxidation ditch sewage treatment device which comprises an aerobic unit, an inclined plate precipitation unit, a steam stripping unit and an anoxic unit based on region division of a reciprocating type circulating water channel in an upper / lower flow direction, the aerobic unit comprises an aeration circulating fluidized bed up-flow zone, an aeration circulating fluidized bed down-flow zone and a steam lift up-flow zone which are communicated in sequence; a microporous aeration disc is arranged at the bottom in the aeration circulating fluidized bed up-flow area to supply oxygen and push the fluidized bed to circulate; the inclined plate precipitation unit comprises an effluent upflow area; an inclined plate settling zone and an effluent overflow weir are arranged at the top of the effluent upflow zone, so that supernate in the inclined plate settling zone overflows and is discharged; the steam stripping unit comprises a perforated aeration pipe arranged at the bottom of the steam lifting flow area, and a steam stripping reinforcing plate and an adjusting weir plate which are arranged at the junction of the steam lifting flow area and the micro-aerobic flow descending area; and the anoxic unit comprises a first anoxic up-flow zone, a first anoxic down-flow zone, a second anoxic up-flow zone and a second anoxic down-flow zone which are communicated in sequence.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an integrated inclined plate oxidation ditch sewage treatment device. Background technique [0002] In the field of sewage treatment, compared with chemical and physical chemical methods, biologically activated sludge method is widely used because of its good treatment effect and low operating cost. At present, the commonly used activated sludge process includes SBR, AO, CASS, MABR, oxidation ditch and other processes. Among them, the oxidation ditch process has the advantages of good effluent quality, strong impact resistance, and stable operation, and has been widely used in urban and industrial wastewater treatment. widely used. The basic feature of the oxidation ditch is that the mud-water mixture presents continuous circulation and backflow, and the process flow has dual characteristics of plug flow and complete mixing. For the oxidation ditch that needs to have th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F3/30
CPCC02F3/1257C02F3/301C02F2001/007C02F2301/04C02F2201/002Y02W10/10
Inventor 黄霞完颜德卿刘佳音程刚
Owner 清华苏州环境创新研究院
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