CN201334416Y

CN201334416Y - Central island-type circular integrated circulatory wastewater treatment device for biological reactor

Info

Publication number: CN201334416Y
Application number: CNU2008202068598U
Authority: CN
Inventors: 李德豪; 殷旭东; 朱越平; 谢文玉; 侯琳
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

A central island-type circular integrated circulatory wastewater treatment device for a biological reactor adopts the structure that an O-type sedimentation tank (9) adopting the central island form is arranged in the middle position of an O-type external wall (1); a C-type partition wall (3) encircles one side of the sedimentation tank (9); an aerobic zone (5) is formed between the partition wall (3) and the sedimentation tank (9); an anoxic zone (2) is formed between the partition wall (3) and the external wall (1); a mixing zone (8) is formed between the external wall (1) and the other side of the sedimentation tank (9); 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

The circular integrated circulating biological reactor sewage treatment equipment of central island formula

Technical field

The utility model relates to the circular integrated circulating biological reactor sewage treatment equipment of a kind of central island formula.

Background technology

Since the Voorshoten of Holland built first oxidation ditch sewage work, (Oxidation Ditch, OD) sewage treatment process obtained rapid promotion and application to oxidation ditch all over the world from A doctor 1Pasveer in 1954.Through nearly 50 years practice and development, oxidation Ditch Technology develops and improves in technology and textural constantly carrying out, the status that in various forms of activated sludge processes, is in a leading position, be be evaluated as that treatment effect is reliable, capital cost is low and the pond type of biological method for treating waste water, particularly its closed circulation formula that working cost is economized is particularly useful for the denitrogenation dephosphorizing of sewage.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.Therefore, be restricted in land resources country use in short supply.Later 1980s, the U.S. has developed a kind of oxidation ditch sewage treatment---integrated oxidation ditch (Integral oxidation Ditch is called for short IDO).It is that a kind of sewage aeration with conventional oxidation ditch device purifies and the precipitation of mixed solution-separates merge into a single whole (settling tank is set directly in the oxidation ditch raceway groove), flows with the no blowback of realization mud.The used method of this method and conventional oxidation ditch device is compared, and has saved the mud return-flow system.Its shortcoming is: second pond is built in the recirculation channel, has increased flow resistance, to having relatively high expectations of aerator, has the excessive problem of floor space.

Summary of the invention

The purpose of this utility model provides the integrated circulating biological reaction waste treatment facility that a kind of each functional zone subregion is obvious, floor space is relatively little and running cost is lower.

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

The circular integrated circulating biological reactor sewage treatment equipment of a kind of central island formula, the exterior wall the inside meta of O type is equipped with the O type settling tank that presents with the central island form, settling tank one side have C type partition wall around, form aerobic zone, the oxygen-starved area of C type between partition wall and settling tank, partition wall and the exterior wall [1] respectively, exterior wall and settling tank opposite side form the mixing zone, lay by aeration head along partition wall in aerobic zone bottom, 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, with the rounded laying of central island form, 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. functional zone subregions such as aerobic, anoxic of the present utility model, 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 circular integrated circulating biological reactor sewage treatment equipment of central island formula, the exterior wall of O type [1] the inside meta is equipped with the O type settling tank [9] that presents with the central island form, settling tank [9] one sides have C type partition wall [3] around, partition wall [3] and settling tank [9], form the aerobic zone [5] of C type between partition wall [3] and the exterior wall [1] respectively, oxygen-starved area [2], exterior wall [1] forms mixing zone [8] with settling tank [9] opposite side, lay by aeration head [4] along partition wall [3] in aerobic zone [5] bottom, 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, the top of corresponding oxygen-starved area [2] inlet, 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, the circular integrated circulating biological reactor sewage treatment equipment of a kind of central island formula, exterior wall [1] the inside meta that it is characterized in that the O type is equipped with the O type settling tank [9] that presents with the central island form, settling tank [9] one sides have C type partition wall [3] around, partition wall [3] and settling tank [9], form the aerobic zone [5] of C type between partition wall [3] and the exterior wall [1] respectively, oxygen-starved area [2], exterior wall [1] forms mixing zone [8] with settling tank [9] opposite side, lay by aeration head [4] along partition wall [3] in aerobic zone [5] bottom, 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, the circular integrated circulating biological reactor sewage treatment equipment of central island formula 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, the circular integrated circulating biological reactor sewage treatment equipment of central island formula 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, the circular integrated circulating biological reactor sewage treatment equipment of central island formula according to claim 3, the horizontal sextant angle that it is characterized in that this inclined-plane [15] is 55～65 °.

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