CN2357002Y

CN2357002Y - Aerating biological filter

Info

Publication number: CN2357002Y
Application number: CN98252187U
Authority: CN
Inventors: 胡天军; 李汝琪
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-12-28
Filing date: 1998-12-28
Publication date: 2000-01-05
Anticipated expiration: 2008-12-28

Abstract

The utility model relates to an aerating biological filtering tank which is used for treating municipal sewage, domestic sewage, and industrial waste water. The utility model comprises a water tank, a water inlet, a filler layer, an aerating grid, a supporting layer, a water outlet, and a back flushing device, wherein, the water inlet and the water outlet are mutually staggered in the vertical direction, and water vertically flows from top to bottom or from bottom to top when passing through the filler layer which is formed by that particulate fillers are distributed on the supporting layer. The utility model utilizes immobilized micro organisms, has three functions of filtration, biological adsorption, and biological oxidation simultaneously, and can provide the functions of general aerating tanks, secondary settling tanks, and sand filtering tanks. The utility model has the advantages of small size, high treating efficiency, favorable water quality of yielding water, and simple process.

Description

BAF

The utility model relates to a kind of waste disposal plant.

Along with the develop rapidly of Environmental Protection in China cause, people improve day by day to the requirement of sewage disposal device, and can strict emission control standards and environmental protection supervision make sewage disposal differentiation up to standard become the big problem that is related to Business survival.Have only the scientific and technological content that improves environmental protection equipment, could satisfy user's needs, conventional sewage disposal is generally horizontal flow and handles, poor effect, and a kind of novel sewage treatment unit that the utility model is born under this calling just.

The purpose of this utility model provides a kind of BAF, it adopts measures such as granular heaving shales particulate filler immobilized microorganism and perpendicular flow, have filtration, biological absorption and three kinds of effects of bio-oxidation simultaneously, can play common aeration tank, the effect of second pond and sand filter; Have that volume is little, processing efficiency is high, effluent quality is good, the simple advantage of flow process.It is used for Treating Municipal Sewage, sanitary sewage and trade effluent.

The purpose of this utility model is achieved in that

A kind of BAF, it comprises: the pond, water-in, packing layer, the aeration grid, supporting layer, water outlet, back-purge system, it is characterized in that: water-in and water outlet stagger mutually in vertical direction, water perpendicular flow from top to bottom or from bottom to top when the packing layer, the packing layer particulate filler, it forms particle diameter 1-10mm and the granular heaving shales of porous for some through sintering, be distributed on the supporting layer, particulate filler is through carrying out a biological disposal upon or cultivating in the pond, its surface growth has microbial film, some back flushing filters are distributed on and constitute supporting layer on the back up pad, the aeration canopy is located at the packing layer bottom above the supporting layer, it is the bar shaped pipe network, and pipe network is provided with many apertures of giving vent to anger, and the aeration grid are connected to pressurized air so that aeration to be provided; Be provided with back-purge system at the bottom of the pond, utilize processing back water outlet to carry out back flushing termly.

Described back flushing filter includes into water buckle closure and water outlet short tube, the water inlet buckle closure is a semisphere, be evenly equipped with the wide vertical narrow slit of 0.2-2mm on the sphere circumference, its hemispheric top is blind plate and also is provided with polygonal projection, the water outlet short tube is provided with air channel or hole, water inlet buckle closure and water outlet short tube be with being threaded, and be clamped on the back up pad.Described water-in also includes one or more groups perforated pipe, and water flows into the pond through perforated pipe uniformly distributing on the plane, pond.Also be provided with a heavy pond in the described pond, a heavy pond is provided with swash plate, header, mud discharging device, constitutes integrated sewage treating apparatus.

The utility model has following advantage and positively effect:

Owing to used novel particulate filler, the specific surface area of filler is very big, reaches about 3.98m ²/ cm ³Therefore, packing layer has good filtration and biological adsorption, can save second pond.All contaminations at first is filtered and adsorbs, and then is utilized by Institute of Micro-biology.The SS that is trapped and the microbial film of growth are backwashed a heavy pond, carry out mud-water separation there.Therefore, BAF can play the effect of coventional type aeration tank, second pond and sand filter simultaneously.

Because the microorganism of BAF belongs to the fixed microorganism, for some organic wastewater with difficult degradation thereby, can inoculate and tame special bacterial classification, improve the treatment effect of used water difficult to degradate.In addition, because a large amount of microorganism growth is on the surface of particulate filler rough porous, microorganism can not run off, and can not keep its bacterial classification even do not turn round for a long time yet; Like this, make its operational management very simple, the tourist city is forced to close in non-travelling season sewage treatment facility, and when the coming year, the visitor arrived, its facility can recover normal operation in several days.

It can also be had any different with general and contact oxidation method as the innovation substitute technology of active sludge.

1. less pond holds and floor space

Because of the volumetric loading of BAF is big, can reach 3-8kgBOD ₅/ m ³.d, be 4-10 times of conventional two stage biological processing, its pond holds and floor space is 1/10 to 1/5 of conventional two stage biological processing.

The particulate filler of high-specific surface area and rough porous can accumulate the microbial biomass of high density, can reach 10-15g/l.The microorganism of high density makes the volumetric loading of BAF increase, so the pond holds and treatment facility has very big meaning, when existing sewage treatment facility can not satisfy current environmental requirement, as long as transform again, change filler and other facility by BAF.Like this, on original civil engineering facility, can reach dilatation and purpose up to standard, for the user saves a large amount of civil engineering costs.

2. high-quality treat effluent

At volumetric loading is 6kgBOD ₅/ m ³.d the time, its water outlet SS and BOD ₅Can remain on below the 20mg/l, the clearance height satisfies domestic and international environmental emission standard greatly, can be used for middle water treatment.Service data shows, when using BAF to handle sanitary sewage, and its average COD and BOD ₅The water outlet concentration value is respectively 12mg/l and 3mg/l, reaches the water reuse standard.To Treatment of Beer Wastewater result shows, when the COD volumetric loading is lower than 10kgBOD ₅/ m ³.d the time, its water outlet COD can satisfy the emission request of 60mg/l, and it also can be used for denitrogenation dephosphorizing.

3. simplification flow process

This technology can be saved second pond and the sludge reflux pump room that prior art is provided with before the clear water storage pool, treatment scheme is simplified, and floor space is further reduced.

4. capital cost, running expense are saved

Because this technical equipment is little, flow process is short, and capital cost is significantly less than conventional secondary biochemical treatment.Simultaneously, particulate filler makes oxygen-transfer efficiency improve, and can save energy consumption.Its filler is the inorganic sintered material, and is durable in use.So this equipment maintenance cost is lower.

5. management is simple, level of automation is high, can realize and microcomputer interface

BAF anti-shock loading very capable do not have the sludge bulking problem, and microorganism can not run off yet.Therefore, daily operation management is simple, and treatment effect is stable.Simultaneously, this equipment cooperates robot can realize whole microcomputer control, and service data and parameter can show on microcomputer, by computer program, realize the automatization control of running device.

Fig. 1 is the diagrammatic cross-section of the utility model embodiment;

Fig. 2 is the floor map of the utility model embodiment;

Fig. 3 is the front view of the utility model recoil filter;

Process flow diagram when Fig. 4 is the utility model use;

Fig. 5 is the orthographic plan of another embodiment of the utility model;

Fig. 6 is the sectional view of Fig. 5.

Describe the utility model in detail below in conjunction with drawings and Examples.

It uses particle diameter 1-10mm heaving shales particulate filler, in its surface growth microbial film is arranged, sewage is the vertical current filter material from top to bottom or from bottom to top, aeration then is provided at the bottom of the pond, make the organism in the waste water obtain oxidation stability, back flushing was carried out in water outlet after it utilized termly and handles, and got rid of the active sludge of propagation.

As Fig. 1, shown in Figure 2: it comprises: pond 1, water-in 2, packing layer 3, aeration grid 4, supporting layer 5, water outlet 6, back-purge system 7, water-in and water outlet stagger mutually in vertical direction, water perpendicular flow from top to bottom or from bottom to top when the packing layer, the packing layer particulate filler, it forms particle diameter 1-10mm and the granular heaving shales 301 of porous for some through sintering, be distributed on the supporting layer, particulate filler is through carrying out a biological disposal upon or cultivating in the pond, its surface growth has microbial film, some back flushing filters 501 are distributed on the back up pad 502 and constitute supporting layer, the aeration grid are located at the packing layer bottom above the supporting layer, it is the bar shaped pipe network, pipe network is provided with many apertures of giving vent to anger, and the aeration grid are connected to pressurized air so that aeration to be provided; Be provided with back-purge system at the bottom of the pond, utilize processing back water outlet to carry out back flushing termly.Described water-in also includes one or more groups perforated pipe 8, and water flows into the pond through perforated pipe uniformly distributing on the plane, pond.

As shown in Figure 3, described back flushing filter 501 includes into water buckle closure and water outlet short tube, the water inlet buckle closure is a semisphere, be evenly equipped with the wide vertical narrow slit of 0.2-2mm on the sphere circumference, its hemispheric top is blind plate and also is provided with polygonal projection, the water outlet short tube is provided with air channel or hole, and water inlet buckle closure and water outlet short tube be with being threaded, and is clamped on the back up pad.

Solid arrow is represented flow direction among the figure, and dotted arrow is represented gas flow, and fork-shaped zone, Fig. 1 middle part is a packing layer 3, and it also is provided with upflow tube 9, inlet pipe 10.

As Fig. 5, shown in Figure 6, also be provided with 15, one heavy pond, a heavy pond in the described pond and be provided with swash plate 12, header 14, mud discharging device 13, constitute integrated sewage treating apparatus.Also be provided with blow-down pipe 11 below the supporting layer 5, volumetric loading of the present utility model is big, and is littler than existing filter tank floor space, a heavy pond and BAF can be formed together, is particularly suitable for the less occasion of existing filter tank transformation and floor space and uses.

Claims

1. BAF, it comprises: the pond, water-in, packing layer, the aeration grid, supporting layer, water outlet, back-purge system, it is characterized in that: water-in and water outlet stagger mutually in vertical direction, water perpendicular flow from top to bottom or from bottom to top when the packing layer, the packing layer particulate filler, it forms particle diameter 1-10mm and the granular heaving shales of porous for some through sintering, be distributed on the supporting layer, particulate filler is through carrying out a biological disposal upon or cultivating in the pond, its surface growth has microbial film, some back flushing filters are distributed on and constitute supporting layer on the back up pad, the aeration grid are located at the packing layer bottom above the supporting layer, it is the bar shaped pipe network, and pipe network is provided with many apertures of giving vent to anger, and the aeration grid are connected to pressurized air so that aeration to be provided; Be provided with back-purge system at the bottom of the pond, utilize processing back water outlet to carry out back flushing termly.

2. BAF according to claim 1, it is characterized in that: described back flushing filter includes into water buckle closure and water outlet short tube, the water inlet buckle closure is a semisphere, be evenly equipped with the wide vertical narrow slit of 0.2-2mm on the sphere circumference, its hemispheric top is blind plate and also is provided with polygonal projection, the water outlet short tube is provided with air channel or hole, and water inlet buckle closure and water outlet short tube be with being threaded, and is clamped on the back up pad.

3. BAF according to claim 1 is characterized in that: described water-in also includes one or more groups perforated pipe, and water flows into the pond through perforated pipe uniformly distributing on the plane, pond.

4. BAF according to claim 1 is characterized in that: also be provided with a heavy pond in the described pond, a heavy pond is provided with swash plate, header, mud discharging device, constitutes integrated sewage treating apparatus.