CN201334397Y

CN201334397Y - Integrated central island-type anoxic-aerobic circulatory wastewater treatment device for biological reactor

Info

Publication number: CN201334397Y
Application number: CNU2008202068600U
Authority: CN
Inventors: 李德豪; 侯琳; 殷旭东; 谢文玉; 朱越平; 钟华文
Original assignee: MAOMING COLLEGE
Current assignee: MAOMING COLLEGE
Priority date: 2008-12-31
Filing date: 2008-12-31
Publication date: 2009-10-28
Anticipated expiration: 2018-12-31

Abstract

An integrated central island-type anoxic-aerobic circulatory wastewater treatment device for a biological reactor adopts the structure that a D-type sedimentation tank (9) is arranged at the middle part of an O-type external wall (1); a partition wall (3) encircles the arc-shaped surface side of the sedimentation tank (9); a C-type aerobic zone (5) is formed between the sedimentation tank (9) and the partition wall (3); a C-type anoxic zone (2) is formed between the partition wall (3) and the external wall (1); a mixing zone (8) is formed between the other side of the sedimentation tank (9) and the external wall (1); aerators (4) are distributed at the bottom of the aerobic zone (5) along the partition wall (3); and agitation impellers (6) are mounted at the inlets of the aerobic zone (5) and the anoxic zone (2) which are on the same side. The utility model has the advantages of compact and simple structure, very simple and convenient operation and maintenance, low labor requirement, and easy realization of remote automatic control.

Description

Integrated central island formula anaerobic-aerobic circulating biological reactor wastewater treatment equipment

Technical field

The utility model relates to a kind of integrated central island formula anaerobic-aerobic circulating biological reactor wastewater treatment equipment.

Background technology

In the present integrated biochemical processing, with the research of oxidation ditch and sequencing batch reactor (SBR) and most widely used, wherein SBR is a batch reactor, and the continous way bio-reactor is then based on integrated oxidation ditch.Oxidation ditch sewage treatment technology the 1950's by the success of Dutch sanitary engineering Research Institute.Since 1954 since the coming into operation first of Holland.Because technical characterstics such as good, stable, the convenient managements of its effluent quality, be widely used in the improvement of sanitary sewage and industrial sewage at home and abroad.So far, oxidation Ditch Technology has experienced the development of over half a century, constantly brings forth new ideas at aspects such as structural form, aeration mode, operation scheme, oxidation ditch of a great variety, that differ from one another occurred.The common feature of these oxidation ditch devices is: oxidation ditch is the plane enclosed irrigation canals and ditches that circulate, and uses a kind of aeration and agitator with direction control to promote the mixed solution along continuous straight runs and circulate continuously in the closed type channel; The residence time of sewage and microorganism is long, and the load of organic pollutant is low; Oxidation ditch can stably reach effective removal of organism and total suspended solid by the operation and maintenance of low limit.Settling tank and oxidation ditch branch are built, and by sludge pump precipitating sludge are back in the oxidation ditch.Its main drawback is that the depth of water is 1～3 meter usually because the ability of aerator is limit, and the degree of depth of oxidation ditch is more shallow, and floor space is big.

Summary of the invention

The purpose of this utility model provides a kind of each functional zone subregion obviously and utilize and be designed to adopt aeration head aeration, floor space is relatively little and running cost is lower integrated central island formula anaerobic-aerobic circulating biological reaction waste treatment unit.

To achieve the above object, the technical solution adopted in the utility model is:

A kind of integrated central island formula anaerobic-aerobic circulating biological reactor wastewater treatment equipment, the exterior wall the inside medium position of O type has the settling tank of D type, arc one side of settling tank have partition wall around, form aerobic zone, the oxygen-starved area of C type between settling tank and partition wall, partition wall and the exterior wall respectively, the opposite side of settling tank and exterior wall [1] form the mixing zone, be laid with aeration head in aerobic zone bottom along partition wall, be positioned at the aerobic zone of the same side, the inlet of oxygen-starved area is separately installed with the stirring impeller.

Described settling tank is supported built on stilts by pillar stiffener.

This settling tank is positioned under one side direction of mixing zone and is extended with the partition wall that links to each other with the exterior wall base plate, and there is an inclined-plane that extends inwards the partition wall inboard.

Described settling tank bottom is the awl bucket that is arranged in parallel, and the awl bucket is for falling platform-type structure.

The utlity model has following advantage:

1, compact construction of the present utility model, succinct, operation is very easy with maintenance, and required labor force is few, and is easy to realize remote auto control.

2, settling tank of the present utility model is installed in the aerobic zone, being D shape lays, need not the outer second pond of building, the platform-type structure of falling of bucket is bored in the settling tank bottom, can effectively alleviate and reduce the turbulent flow influence of bottom flow settling tank, simultaneously because the negative pressure that bottom flow produces in flowing can realize from refluxing mud, floor space and working cost have been reduced, and help keeping the dissolved oxygen of water outlet, guarantee effluent quality, can reduce the turbulence effect of aeration, also can reduce the resistance of fluid flow settling tank.

3, aerobic and anoxic of the present utility model, functional zone subregions such as mixing are clear and definite, and control helps finishing synchronously organic removal and biological denitrificaion easily.At aerobic zone, mixed solution has been oxygen condition, effectively degradation of organic substances and ammonia nitrogen is oxidized to nitric nitrogen (nitrate nitrogen and nitrite nitrogen).Being anoxic condition in the oxygen-starved area, is carbon source with the organism, under the effect of denitrifying bacteria is nitrogen and removing from water with nitrate-nitrogen reduction.

4, the utility model helps mixed solution repeatedly circulation between aerobic-anoxic-mixing zone, and refluxes automatically and realize the denitrogenation purpose.

Description of drawings

Fig. 1 is a floor map of the present utility model;

Fig. 2 is a diagrammatic cross-section of the present utility model.

Embodiment

See figures.1.and.2, the integrated circulating biological reactor of a kind of central island formula anaerobic-aerobic wastewater treatment equipment, the exterior wall of O type [1] the inside medium position has the settling tank [9] of D type, arc one side of settling tank [9] have partition wall [3] around, settling tank [9] and partition wall [3], form the aerobic zone [5] of C type between partition wall [3] and the exterior wall [1] respectively, oxygen-starved area [2], the opposite side of settling tank [9] and exterior wall [1] form mixing zone [8], be laid with aeration head [4] in aerobic zone [5] bottom along partition wall [3], be positioned at the aerobic zone [5] of the same side, the inlet of oxygen-starved area [2] is separately installed with and stirs impeller [6].

Described settling tank [9] is supported built on stilts by pillar stiffener [16], the window that links for settling tank [9] and aerobic zone [5] between the pillar stiffener [16], this settling tank [9] is positioned at and is extended with the partition wall [14] that links to each other with exterior wall base plate [13] under [8] one side direction of mixing zone, and there is an inclined-plane [15] that extends inwards partition wall [14] inboard, and the horizontal sextant angle of this inclined-plane [15] is 55～65 °.

Described settling tank [9] bottom is the awl bucket [10] that is arranged in parallel, and awl bucket [10] is for falling platform-type structure, and its conical surface and horizontal plane angle are 60～75 °.

Water-in [7] is opened at exterior wall [1] and is gone up, top, corresponding oxygen-starved area [8], and overflow weir [12] is arranged at settling tank [9] top, has water outlet [11] on the overflow weir [12].

Principle of work of the present utility model is: sewage enters the oxygen-starved area [8] that microbial population (active sludge) is housed by water-in [7], flow through under the promotion of stirring impeller [6] oxygen-starved area [2] and aerobic zone [5].[2] mixed solution is anoxic condition in the oxygen-starved area, under the effect of denitrifying bacteria is nitrogen and removing from water with nitrate-nitrogen reduction; Denitrification is a carbon source with the organism, as COD, therefore can simultaneously partial organic substances be removed; In aerobic zone [5], carry out oxygenic aeration by the aeration head of laying along partition wall [3] [4] that is installed in the bottom, make mixed solution be oxygen condition, carry out the nitration reaction of organic matter removal and ammonia nitrogen in aerobic zone [5], nitration product then is circulated to and carries out denitrification in the oxygen-starved area [2] and remove nitrogen.

A part of mixed solution enters settling tank [9] by the awl bucket [10] of settling tank [9] bottom in aerobic zone [5] simultaneously, absorption at the sludge suspension layer, carry out solid-liquid separation under the action of gravity of collision and active sludge self, mixed solution is after solid-liquid separation, discharge by water outlet [11] through overflow weir [12] with the supernatant liquor of water inlet equivalent, mud is then under the drive of self gravitation and bottom streaming fluid, certainly be back in the aerobic zone [5] by awl bucket [10], and with mixed solution under the promotion of stirring impeller [6] in this device the aerobic-anoxic-blended of realization repeatedly circulate, sewage is purified.

Claims

1, a kind of integrated central island formula anaerobic-aerobic circulating biological reactor wastewater treatment equipment, exterior wall [1] the inside medium position that it is characterized in that the O type has the settling tank [9] of D type, arc one side of settling tank [9] have partition wall [3] around, settling tank [9] and partition wall [3], form the aerobic zone [5] of C type between partition wall [3] and the exterior wall [1] respectively, oxygen-starved area [2], the opposite side of settling tank [9] and exterior wall [1] form mixing zone [8], be laid with aeration head [4] in aerobic zone [5] bottom along partition wall [3], be positioned at the aerobic zone [5] of the same side, the inlet of oxygen-starved area [2] is separately installed with and stirs impeller [6].

2, integrated central island formula anaerobic-aerobic circulating biological reactor wastewater treatment equipment according to claim 1, it is built on stilts to it is characterized in that described settling tank [9] is supported by pillar stiffener [16].

3, integrated central island formula anaerobic-aerobic circulating biological reactor wastewater treatment equipment according to claim 1, it is characterized in that this settling tank [9] is positioned at is extended with the partition wall [14] that links to each other with exterior wall base plate [13] under [8] one side direction of mixing zone, and there is an inclined-plane [15] that extends inwards partition wall [14] inboard.

4, integrated central island formula anaerobic-aerobic circulating biological reactor wastewater treatment equipment according to claim 3, the horizontal sextant angle that it is characterized in that this inclined-plane [15] is 55～65 °.

5, integrated central island formula anaerobic-aerobic circulating biological reactor wastewater treatment equipment according to claim 1 is characterized in that described settling tank [9] bottom is the awl bucket [10] that is arranged in parallel, and awl bucket [10] is for falling platform-type structure.

6, integrated central island formula anaerobic-aerobic circulating biological reactor wastewater treatment equipment according to claim 5 is characterized in that the conical surface and the horizontal plane angle of awl bucket [10] is 60～75 °.