CN2276021Y - Improved biological contact filler - Google Patents

Abstract

The utility model belongs to the improvement of a filling used for sewage biologic treatment. The utility model is characterized in that the filling is composed of a hollow grid and sponge carriers arranged in the grid. Each sponge carrier is made to have aerobic microenvironment, oxygen deficit microenvironment and anaerobic microenvironment simultaneously, and therefore, the same filling can be used for carrying out aerobic decomposition for organic matters, extraction of nitrogen and dephosphorization simultaneously. Adjusting the shape and the size of a sponge block or the matching proportion of the size of the sponge block can regulate the proportion of the aerobic microenvironment, the oxygen deficit microenvironment and the anaerobic microenvironment of the filling, the purpose of controlling species and quantities of microbes on the filling can be achieved, large contact areas are added, and therefore, the utility model can be suitable for wider sewage treatment.

Description

A kind of improved biological contact filler

Utility model is to the improvement of biological sewage treatment with filler.

Chinese patent 93217017 disclosed a kind of biological sewage treatment fillers that do not produce excess sludge, it is that the band that is made of plastics radially leads to the hollow grid shell of heart porous cylinder and the light plastic fiber pompon composition of interior filling.Its objective is that each filling ball is had simultaneously is aerobic, lose oxygen and three kinds of microenvironments of anaerobism, make and in filling ball, both can carry out the aerobic decomposition of organism, Nization thing nitrated, the absorption of P, can carry out anaerobic hydrolysis again, acidifying, a series of processes such as release of denitrification and P, thereby make nitrated-denitrification, the absorption of P and release and hydrolysis-aerobic equally correlated process can carry out in same filler in succession, and do not need to resemble the conventional bioremediation by refluxing or other method changes the microorganism growth environment, realize saprobia degraded and denitrogenation, dephosphorization.Thereby it is few to have overcome existing biological treatment filler growth microbe species and quantity, pollutant removal narrow range, function singleness, the shortcoming that the mud generation is big.Yet this filler also exists deficiency, the one, and it is complicated to be with radially logical heart porous cylinder grid housing to make; The 2nd, interior filling plastic cellosilk ball shape is difficult for fixing, the inside and outside degree of tightness of spheroid differs, like this unit filler aerobic layer, lose the oxygen layer, three kinds of microenvironments of anaerobic layer distribute wayward and fixing, because the biosphere instability of attached microbial, thereby the microbe species of degradation of sewage distributes and is difficult to reach the design ideal state, influences treatment effect; The 3rd, the fiber pompon maintains static in the grid housing, also is unfavorable for biomembranous renewal, influences processing efficiency equally, and therefore still having is worth improved place.

The purpose of utility model is to overcome the deficiency of above-mentioned prior art, a kind of improved biological contact filler is provided, making it not only has big specific surface area, and can artificially control growth ratio aerobic, that lose oxygen, three kinds of microenvironment conditions of anaerobism and microbe species according to the sewage disposal needs, and microbial film upgrades fast, thereby can really be implemented in the same unit filler and can carry out organic aerobic degradation simultaneously, take off N, take off P, satisfy various biological sewage treatment.

The utility model purpose realizes that main the improvement is to replace the fiber pompon with some foam sponge bodies in the plastic casing of hollow, thereby reaches the controlled of microorganism growth environment, to reach the purpose of removing BOD, nitrogen, phosphorus in a kind of filler simultaneously.Specifically, utility model comprises plastic hollow grid housing and built-in biological carrier, it is characterized in that said built-in biological carrier is some block cavernous bodies.The effect of the described hollow grid housing of utility model mainly is a frame cage sponge filling carrier, prevents that filler runs off; Secondly the sponge anti-floating is also had effect, grid shell itself also can constitute bio-carrier simultaneously.Therefore shell can be how much solids of various hollows, as square, rectangular parallelepiped, spheroid, polyhedron globe, spheroid, cylindrical body etc., be good with spherosome especially wherein, help the unit filler in sewage, to roll, fully contact with sewage, improve the filler utilising efficiency.Grid density can be adjusted according to the sewage disposal needs, and the limit flows out not make sponge block.Sponge block is the microorganism growth carrier, also can be various how much solids, as rectangular parallelepiped, square, polyhedron, spheroplast etc., from helping processing and fabricating, be good then with square or spheroid, for well, it is little to cross the big unit packing specific area with 0.8--2CM for its length of side or diameter, too smallly is unfavorable for aerobic, as to lose oxygen, three kinds of microenvironments of anaerobism distribution.The outside growth aerobic bacteria of sponge carrier, organism in the degradation of sewage, carrier inside produces hold concurrently oxygen, anaerobic biochemical reaction, carry out denitrogenation, dephosphorization, simultaneously under double gas condition, denitrifying bacteria not only can denitrogenation, can also decomposing organic matter, thus further improved the organic matter degradation ability.The death of microorganism in the sponge carrier in the sewage disposal, can be used as the food of newborn microorganism again, thereby reduced the generation of mud, and the organic carbon that discharges after its self-dissolving, promptly " internal carbon source " also can be used as the supply carbon source, makes to need not additional carbon in the biological denitrification process.For further improving the filler treatment effect, also can in cavernous body, load activated carbon.

Description below in conjunction with accompanying drawing and a kind of example further specifies utility model, but accompanying drawing given should be as qualification of the present utility model.

Fig. 1 is a kind of typical structure synoptic diagram of utility model.

Fig. 2 is a sponge carrier microorganism growth microenvironment synoptic diagram.

Hollow grid housing 1 is by forming with the compacting of the approaching plastics of sewage proportion, can make filler in sewage, be suspended state like this, thereby omit the filler suspension system, a kind of housing of grid preferably is to adopt hollow ball, it has two hemispherical Shell interlocks to constitute hollow mother bulb, this structure one be help the inner stuffing carrier by putting and change, the 2nd, make things convenient for machine-shaping, the ball wall is that crisscross rib constitutes, and places some block foam sponge filling carriers 2 in the ball.For well, filling is very few with the 20%-60% of mesh space for the packing fraction of sponge block, and the unit packing specific area is little; Filling is too much, hinders the motion of sponge block in the grid housing, is unfavorable for that filling carrier fully contacts and biomembranous renewal with sewage.For easy to process, sponge block adopts square, and the length of side is good with 0.8-2CM.The sponge filling block has formed fixed aerobic layer I, has lost three kinds of microenvironments of oxygen layer II, anaerobic layer III in sewage, satisfying the needs of multiple microorganism growth, shape by the control sponge block and size or size matching ratio are controlled the preparation of three kinds of microenvironments.As required, can also be in sponge block the loading section activated carbon.Filler is under aeration and current promotion, the circulation of filler body is stirred on the one hand, sponge carrier in the grid also constantly rolls on the other hand, filler is fully contacted with sewage, thereby strengthened contacting of sewage and filler, add that sponge has abundant contact area, these all are favourable to the processing power that improves sewage.

Utility model is owing to adopt sponge block to make the microorganism growth carrier, replace the plastic optical fibre pompon, thereby make in the sponge carrier simultaneous aerobic-to lose three kinds of microenvironments of oxygen-anaerobism controlled and stable, the microorganism growth kind is complete, quantity is many, the treatment and purification ability is strong, the pollutant removal scope is wide, reach the purpose that can in a kind of filler, realize removing BOD, nitrogen, phosphorus simultaneously, make the secondary or the tertiary treatment of sewage, can realize with a kind of filler, can improve the ability and the efficient of raw waste water treatment facility greatly, and obtain denitrogenation preferably, dephosphorization function.Adjust shape, size or the sponge block size matching ratio of sponge block, just can regulate the ratio that filler is aerobic, lose oxygen, two kinds of microenvironments of anaerobism, reach microbe species and quantity on the control filler, thereby adapt to comparatively broad sewage disposal.Secondly sponge carrier has bigger contact area, can bear the wastewater treatment of higher concentration, thereby have very strong impact resistance.Sponge carrier moves in sewage, has on the one hand improved contacting of filler and sewage, and make microorganism growth, come off, upgrade quickening; Sponge space portability partial oxygen bubble flows together on the other hand, has strengthened oxygen in water content, and these all help improving the sewage purification ability.The utility model filler, because growth has multiple microorganism, effect because of food chain, can make that the mud generation significantly reduces in the sewage disposal, when filler as high loading biological treatment, when producing a certain amount of mud, filler can be taken out from treatment tank, squeeze out the mud of high density or change cavernous body, thereby also can omit sludge thickener.The utility model sponge carrier can utilize the scrap stock of packing, processing industry to shear, and price is low to be held concurrently.

Claims (6)

1, a kind of stuffing for biological treatment of waste water is made up of plastic hollow grid housing and built-in biological carrier, it is characterized in that described built-in biological carrier is some block cavernous bodies.

2,, it is characterized in that said hollow grid housing is a spherosome according to the described stuffing for biological treatment of waste water of claim 1.

3,, it is characterized in that said cavernous body is a square according to claim 1 or 2 described stuffing for biological treatment of waste water.

4,, it is characterized in that the said cavernous body length of side is 0.8--2CM according to the described stuffing for biological treatment of waste water of claim 3.

5,, it is characterized in that said cavernous body packing fraction is 20%-60% according to claim 1 or 2 described stuffing for biological treatment of waste water.

6, according to claim 1 or 2 described stuffing for biological treatment of waste water, it is characterized in that being filled with activated carbon in the said sponge block.