CN201358188Y

CN201358188Y - Sewage treatment device with integrated fluidized beds and fixed beds

Info

Publication number: CN201358188Y
Application number: CNU2009200664083U
Authority: CN
Inventors: 丁国际; 刘德永; 郑广宏; 杨宇
Original assignee: University of Shanghai for Science and Technology
Current assignee: University of Shanghai for Science and Technology
Priority date: 2009-01-04
Filing date: 2009-01-04
Publication date: 2009-12-09
Anticipated expiration: 2019-01-04

Abstract

The utility model discloses a sewage treatment device with integrated fluidized beds and fixed beds. The device comprises a tank body, wherein vertical baffles are arranged in the tank body and divide the tank body into seven reaction tanks connected in series; in each two adjacent reaction tanks, the lower part of the front reaction tank is communicated with the upper part of the back reaction tank; the second, the third, the fifth and the sixth reaction tanks are aerobic fluidized beds, and filled with porous elastic carriers; aerating devices are arranged on one side of the bottom of each of the four reaction tanks; the suspension carriers in the tanks are in a fluidized state under the driving of air; the first, the fourth and the seventh reaction tanks are fixed beds, and filled with porous elastic carriers which are in a fixed state; two porous separators are arranged at two ends of each reaction tank respectively; sludge discharge holes are formed at the bottoms of all the reaction tanks; a water inlet is formed at the upper part of the first reaction tank; overflow weirs are arranged at the upper parts of the first, the third, the fifth and the seventh reaction tanks; and a water outlet is formed at the upper part of the seventh reaction tank. The treatment device has the advantages of high treatment efficiency, low energy consumption in operation, strong shock resistance, less residual sludge, small occupied area, convenient management and the like, and is particularly applicable to small-scale sewage treatment fields.

Description

Fluidized-bed---fixed bed integrated sewage treating apparatus

Technical field

The utility model relates to a kind of waste disposal plant, specifically a kind of fluidized-bed---fixed bed integrated sewage treating apparatus.

Background technology

Along with expanding economy, industrialization, quickening of urbanization process, the water pollution problems of China is on the rise.People have produced a large amount of sanitary sewages and various trade effluent in life and production process.Direct discharging will cause serious water pollution to these waste water if do not handled or handle not up to standard.Yet the transformation of municipal drainage pipe network, the construction of expansion and municipal sewage plant seriously lags behind, the unprocessed water body that directly enters of most sewage, seriously polluted, newly-built residential quarter is mostly away from the city or be positioned at the area that the municipal drainage pipe network fails to cover, simultaneously, because Rural Water Environment consciousness is thin and improvement lacks of capital, the unprocessed just direct discharging of the sanitary sewage of Rural areas also is the major reason that water quality descends.

Use the dispersed miniature waste disposal plant and can handle these water and qualified discharge effectively this moment, thereby alleviate the pollution level of water body.Therefore have only develop as early as possible real efficient, low consumption, the small sewage treatment equipment that cost and running cost are cheap could adapt to the needs of samll cities and towns and new countryside construction in China.

In present sewage disposal technology, in order to reach the target of denitrogenation dephosphorizing, the technology that is adopted mostly is A greatly ²/ O and various improved form thereof, but this arts demand has the refluxing unit of nitrification liquid and mud, want to keep higher denitrogenation dephosphorizing effect, just must strengthen quantity of reflux, certainly will increase Sewage Plant day-to-day operation expense like this, and in the application of practical project, this technical process complexity, move loaded down with trivial detailsly, in small-sized sewage disposal is used, have certain defective.

Summary of the invention

The utility model in conjunction with the advantage of biomembrance process, provides a kind of fluidized-bed in order to overcome the deficiency of conventional art---the fixed bed integrated sewage treating apparatus.Save complicated mixed solution and mud return-flow system, reduced the energy consumption in the sewage treatment process, reduced surplus sludge volume and floor space, improved sewage treating efficiency.

In order to achieve the above object, the utility model adopts following technical proposals: a kind of fluidized-bed---fixed bed integrated sewage treating apparatus, it comprises a pond body, it is characterized in that installing vertical dividing plate additional in the body of described pond, the pond body is divided into 7 placed in-line reaction tanks, the preceding reaction tank bottom in each adjacent reaction pond and top, afterreaction pond are interconnected, waste water in reaction tank along current downflow on the dividing plate, make current be up and down zig-zag generally and stream, but the current in the body of whole pond are then made horizontal plug-flow with slower speed.Wherein the 2nd, 3,5 and 6 reaction tanks are aerobic fluidized bed, the filling porous resilient support of part in the pond, and the volume filling ratio is 26%-46%, and reaction tank bottom one side is arranged aerating apparatus, and the suspending carrier in the drive lower storage reservoir of air is fluidized state; 1st, 4 and 7 reaction tanks are fixed bed, fill up the poroelasticity carrier in the pond, and the volume filling ratio is 95%-100%, and carrier is a stationary state, presents the anaerobism anoxic condition in the reaction tank.All reaction tanks are respectively established a porous division board in two ends up and down, and immobilization carrier prevents the loss of carrier.Each reaction tank bottom is equipped with mud discharging mouth, regular spoil disposal from each reaction tank, and water-in is arranged at the first reaction tank top, and overflow weir is arranged at the 1st, 3,5 and 7 reaction tank tops, and water port is arranged at the 7th reaction tank top.In order to guarantee final overflow water outlet, the 1st, be provided with one between 2 reaction tanks and change the water conservancy diversion compartment that flows to, in order to prevent that sewage from flowing backwards between each reaction tank, guarantee sewage horizontal forward plug-flow under the effect of gravity, the dividing plate that has overflow weir in the reaction tank reduces successively along the direction of current.

With respect to existing technology, the utlity model has following substantive distinguishing features and advantage:

1. do not need special mixed solution and mud refluxing unit, operation energy consumption is low

In the running cost of device, the large percentage that energy consumption cost is shared, reducing energy consumption is the key that reduces running cost.This treatment unit is owing to adopted biomembranous technology mode, the poroelasticity carrier is set in the device, has higher microorganism concn in the reactor, by the dissolved oxygen levels in the controlling reactor, can be in the inner aerobic-anaerobic microenvironment of enriching that forms of microbial film, and long sludge age also helps the growth of nitrifier, is easy to realize synchronous nitration denitrification denitrogenation efficiently.By at Chi Tizhong dividing plate being set, hocket in aerobic zone and oxygen-starved area, created good environment for the efficient removal of nitrogen phosphorus again, therefore can save special reflux.Adopt biomembrance process can save the needed whipping device in oxygen-starved area simultaneously, whole device possesses the feature of less energy-consumption.

2. fluidized-bed and fixed bed move at interval, the processing efficiency height, and capacity of resisting impact load is strong

Suspending carrier in this device Aerobic Pond is along with the gas that aeration produced forms fluidized-bed, organism in the sewage and dissolved oxygen in fluidized-bed since the turbulent flow hydraulics and be diffused into rapidly bio-carrier around, the contact area of organism and sewage and the relative movement between sewage and the microbial film have been enlarged, promote the absorption of organism suppressed by vector microbial film, simultaneously also created necessary condition for organic degraded, the speed of biochemical reaction is higher, capacity of resisting impact load is strong, and there is not blocking problem, but is entrained with the microbial film fragment that comes off in a large number in the water outlet easily.Fixed bed is except having filtering effect, through containing a large amount of dissolved oxygens in the aerobic fluidisation pond processing sewage later, make whole reactor be in anoxic anaerobic state, help the carrying out of anti-nitration reaction, further improved the performance of entire treatment device denitrification.Aerobic fluidized bed and organic assembling fixed bed makes device have high processing efficient to sewage.

3. surplus sludge volume is few, and floor space is few, convenient management

The poroelasticity carrier is set in the treatment unit, and has adopted the placed in-line pattern of a plurality of reaction tanks, sludge retention time and the long microorganism food chain in the reactor that extended reduced sludge yield.This integrated reacting device has the microorganism of high density, and utilizes reactor wall altogether, has significantly reduced floor space.The Inlet and outlet water Continuous Flow has the characteristics easily of operational administrative.

Description of drawings

Fig. 1 is this practical structure principle chart

Fig. 2 is a perspective view of the present utility model

Embodiment

Referring to Fig. 1, Fig. 2, details are as follows in conjunction with the accompanying drawings: fluidized-bed for a preferred embodiment of the present utility model---the fixed bed integrated sewage treating apparatus, it comprises a pond body 16, vertical dividing plate 15 is set in the pond body 16, the pond body is divided into equal-sized 7 placed in-line reaction tank 1-7, and the preceding reaction tank bottom in each adjacent reaction pond and top, afterreaction pond are interconnected.Wherein, the 1st, 4 and 7 reaction tanks are aerobic fluidisation pond, in establish poroelasticity carrier 14, the volume filling ratio of carrier is 26%-46%, bottom one side in fluidisation pond is provided with bar shaped aerating apparatus 10.2nd, 3,5 and 6 reaction tanks are fixed spool, in establish poroelasticity carrier 14, the volume filling ratio of carrier is 95%-100%.The two ends up and down of each reaction tank respectively are provided with a porous division board 13, prevent the loss of carrier, and the bottom respectively is provided with mud discharging mouth, regularly spoil disposal.Sewage enters into reactor by water-in 8, and order is streamed through each reactor, horizontal forward plug-flow, and the water after the processing finally passes through water port 9 dischargers through overflow weir 12 overflow water outlets.

The mode that the present invention adopts fluidized-bed and fixed bed to move at interval has unique advantage, not only makes device have stronger organism, nitrogen, and phosphorus is removed performance, but also has guaranteed that the SS in the water outlet remains at low levels.The poroelasticity carrier that is adopted in the device is a polyurethane material, and cube structure, proportion after the carrier biofilm and water seemingly be suspended state in water, and it are big to have specific surface area, and biofilm is easy, lower-price characteristic.

The utility model has carried out the experimental study of treatment of simulated sanitary sewage, its result shows: under 25-29 ℃ temperature, when waste water COD concentration is 350-450mg/L, ammonia nitrogen concentration is 30-35mg/L, total phosphorus concentration is 1.6-2.6mg/L, the hydraulic detention time of device is 12 hours, the average removal rate of COD is 95.7%, the average removal rate of ammonia nitrogen is 97.1%, average total nitrogen removal is 51.4%, the average removal rate of total phosphorus is 63.5%, and the SS in the water outlet is lower than 20mg/L, meets national city domestic sewage second-stage treatment first discharge standard.

Claims

1. a fluidized-bed---fixed bed integrated sewage treating apparatus, comprise a pond body (16), it is characterized in that installing additional in the described pond body (16) vertical dividing plate (15), pond body (16) is divided into 7 placed in-line reaction tanks (1-7), and the preceding reaction tank bottom in each adjacent reaction pond and top, afterreaction pond are interconnected; Wherein the 2nd, 3,5 and 6 reaction tanks are aerobic fluidized bed, the filling porous resilient support of part (14) in the pond, and reaction tank bottom one side is arranged aerating apparatus (10), the suspending carrier in the drive lower storage reservoir of air is fluidized state; 1st, 4 and 7 reaction tanks are fixed bed, fill up poroelasticity carrier (14) in the pond, and carrier is a stationary state; All reaction tanks (1-7) two ends are up and down respectively established a porous division board (13), each reaction tank (1-7) bottom is equipped with mud discharging mouth (11), water-in (8) is arranged at the first reaction tank top, and overflow weir (12) is arranged at the 1st, 3,5 and 7 reaction tank tops, and water port (9) is arranged at the 7th reaction tank top.

2. fluidized-bed according to claim 1---the fixed bed integrated sewage treating apparatus is characterized in that: described poroelasticity carrier (14) is a polyurethane material, and cube structure is suspended state in water after the biofilm.

3. fluidized-bed according to claim 1---the fixed bed integrated sewage treating apparatus is characterized in that: the volume filling ratio of described aerobic fluidized bed middle carrier is 26%-46%, and the volume filling ratio of carrier is 95%-100% in the described fixed bed.