CN101717149B - Biological purification method of aquiculture waste water and siphoning reciprocating type biological filter - Google Patents
Biological purification method of aquiculture waste water and siphoning reciprocating type biological filter Download PDFInfo
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- CN101717149B CN101717149B CN2009101996875A CN200910199687A CN101717149B CN 101717149 B CN101717149 B CN 101717149B CN 2009101996875 A CN2009101996875 A CN 2009101996875A CN 200910199687 A CN200910199687 A CN 200910199687A CN 101717149 B CN101717149 B CN 101717149B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a biological purification method of aquiculture waste water and a siphoning reciprocating type biological filter. The method comprises the following steps: continuously injecting waste water into a purifying cavity of the filter; discharging water through a water discharging pipeline so that the water level in the purifying cavity rises; when the water level in the purifying cavity is higher than the top of a siphoning device, generating the siphoning, discharging water outwards through the water discharging pipeline and the siphoning device together so that the water level in the purifying cavity falls; destroying and stopping the siphoning, and stopping discharging water outwards by the siphoning device; and repeating the steps. The biological purification method and the filter provided by the invention realize the automatic up and down reciprocating movement of the water level by using the siphoning principle, realize the continuous work of a single cavity, enable the relative displacement to be generated between fillers, and realize the self-purification effect; the movement of the fillers improves the mass transfer condition of nutrient substances between a solid phase and a liquid phase on the surface of a biological film, improves the efficiency of the nitration reaction, and has high removing efficiency of ammonia nitrogen and stable operation; and the invention has simple structure, low manufacturing and operating cost, small floor space and wide application range.
Description
Technical field
The present invention relates to the water-treatment technology field of aquaculture system, relate in particular to the method and the siphoning reciprocating type biofilter that is used for this method of ammonia nitrogen (TAN) in a kind of removal aquiculture waste water.
Background technology
In the fish culture process, the various different compounds of nitrogen are the main discarded objects that produces.Wherein, ammonia nitrogen is an important component in the fish excreta, and it is very big to the toxicity of fish, require the total ammonia nitrogen amount not to be higher than 1mg/L in the general fish culture water body, or non-ion state ammon is less than 0.025mg/L.
Biological purification plant is the important device of circulation aquaculture system, it is by being converted into nitrite attached to filling surface or the nitrifying bacteria that is suspended in the water body with ammonia nitrogen, be converted into nitrate at last, thereby ammonia nitrogen is converted into the less nitrate nitrogen of toxicity.
Nearly all circulation all will be used the immobilized biological membrane filter, and biological purification plant depends on the total surface area that is fit to the nitrifying bacteria growth for the removal ability major part of ammonia nitrogen.In order to reach maximizing efficiency, the filler of use must have high-specific surface area, also needs the fluidised form that enough porositys guarantee water simultaneously.
Biological purification plant relatively more commonly used at present has the husky bed of immersed filter, trickle filter, biological rotating disk (RBC), pearl filter and fluidisation biofilter.Every kind of biofilter all has their merits and demerits separately.The husky bed filter of immersed filter, pearl filter and fluidisation all is operated under the oxygen consumption environment, relies on the dissolved oxygen in the water inlet to keep the needs of biomembrane for oxygen fully.If because some cause specific, the dissolved oxygen in the water inlet is low excessively, whole filter will be owing to anoxic cisco unity malfunction.Opposite, it is exactly in normal working conditions that dribble-feed biofilter and RBC have a common advantage, and they can carry out oxygenation in water body.In addition, can also reach certain degasifying effect.But it is exactly that packing specific area is lower that trickle filter and RBC type filter all have a significant disadvantages.Because the cost of filter is to be directly proportional with its total surface area basically, therefore the filter volume of the type that can make is big and cost is higher.If another shortcoming of trickle filter and RBC type filter is exactly suspended particulate not to be carried out enough control, be easy to cause biological the obstruction.Fast 100 times of the growth rate of heterotroph bacterium than autotrophic type nitrifying bacteria.Their quantity can be double in one hour, yet this may need to take several days time for nitrifying bacteria.The nitrifying bacteria of the such growth rate and the biomembrane bottom that can make a large amount of consumption of oxygen is owing to anoxic is suffocated, final deadly come off from biomembrane.
As seen, but the filter of existing aquaculture system can not have high ammonia nitrogen removal efficient, simple in structure, characteristics such as operating cost is low, the scope of application is extensive, floor space is little, stable and continuous operation simultaneously concurrently.
Summary of the invention
Purpose of the present invention is exactly in order to solve the deficiency of existing biofilter, but and provides a kind of siphoning reciprocating type biofilter and system that has high ammonia nitrogen removal efficient, simple in structure, advantages such as operating cost is low, the scope of application is extensive, floor space is little, stable and continuous operation concurrently.
Siphonage is that liquid intermolecular attraction and potential difference can cause.Promptly utilize water column pressure poor, make liter waterborne flow to lower again.Because the mouth of pipe water surface bears different atmospheric pressures, while water can by pressure big to flow to pressure little, the atmospheric pressure up to both sides equates that the water surface in the container becomes double altitudes, water will stop to flow.Utilize siphonage the water in the container can be extracted out soon.
For achieving the above object, the invention provides a kind of biological purification method of aquiculture waste water, may further comprise the steps:
A. with waste water from continue to pour in the purification cavity of the biofilter that the buoyancy filler is housed;
B. outlet pipeline draining, and drainage discharge is less than inflow purifies that water level rises in the cavity, and purifies the siphoning installation water level that cavity links to each other with outlet pipeline and rises simultaneously;
C. purify the interior water level of cavity and be higher than the siphoning installation top, siphonage produces;
D. purify the interior water of cavity by outlet pipeline and siphoning installation outwards draining in the lump, and drainage discharge purifies water level reduction in the cavity greater than inflow;
E. destroy siphon, siphonage stops, and siphoning installation stops outside draining;
F. repeat above-mentioned steps.
Further, step e sucks air in the siphoning installation, and siphonage stops, and siphoning installation stops outside draining.
Further, the step b duration is 1-10min, and the steps d duration is 0.5-5min.
For achieving the above object, the present invention also provides a kind of siphoning reciprocating type biofilter that is used for the biological purification method of above-mentioned aquiculture waste water, it comprises purification cavity, inlet pipeline, buoyancy filler, siphoning installation and outlet pipeline, described buoyancy filler is located at and is purified in the cavity, described inlet pipeline is positioned at and purifies the cavity top, and described outlet pipeline and siphoning installation all communicate with the purification cavity.
Further, the delivery port of described outlet pipeline and siphoning installation all is lower than the bottom that purifies cavity.
Further, described siphoning installation is the pipeline with inverted U pipeline section, described inverted U pipeline section and purification cavity UNICOM.
Further, the pipeline that described siphoning installation is made up of inverted U pipeline section and water storage pipeline section, described inverted U pipeline section and purification cavity UNICOM, water storage pipeline section and outlet pipeline UNICOM, the position of described water storage pipeline section and outlet pipeline joint is higher than itself and inverted U pipeline section joint, and is provided with gas outlet upwards near itself and outlet pipeline joint.
Further, described siphoning reciprocating type biofilter also has siphon destructing tube, and described siphon destructing tube is a siphunculus, and the one end communicates with purifying cavity, and its other end communicates with the inverted U pipeline section of siphoning installation.
Further, also be provided with one or more grids in the described purification cavity, described grid is crisscross structure, the vertical or horizontal interval 50-70mm that it is adjacent.
Further, also be provided with water-distributing device in the described purification cavity, it is positioned at grid top and inlet pipeline below.
Further, described water-distributing device is the water distribution orifice plate, has a plurality of holes on it, and the aperture is 1-2mm.
Further, also be provided with base plate in the described purification cavity, described base plate is positioned at the top that grid below and outlet pipeline and siphoning installation and purification cavity join, and has a plurality of holes on the described base plate, and the aperture is 1-2mm, and described buoyancy filler is between water distribution orifice plate and base plate.
Further, described siphon destructing tube is positioned at the base plate top with purification cavity joint, and in the grid below.
Further, described buoyancy filler is circular EPS (expanded polystyrene (EPS)) filler, and its density is 20-60kg/m
3, its particle diameter is 1-4mm, and its particle diameter is not less than the aperture in hole on water distribution orifice plate and the base plate, described buoyancy filling surface attached biological film.
Further, the height of described buoyancy packing layer in purifying cavity accounts for the 40-70% that purifies cavity.
Further, described purification cavity bottom also is provided with blowoff line.
The siphoning reciprocating type biofilter that is used for aquaculture system provided by the invention has following positive advancement of technology effect:
1. use a purification cavity can realize continuous operation;
2. utilize siphon principle to realize purifying cavity middle water level and the constantly automatic motion process that moves in circles that rises and descend of filler;
3. employing buoyancy biologic packing material---EPS (expanded polystyrene (EPS)) filler, its density is 20-60kg/m
3Purifying inside cavity, the buoyancy of filler makes packing layer integral body along with the rising of water level and decline and produce and pump, grid is set in the part makes between filler and the filler and produce relative displacement,, realize the auto purification effect by friction, extruding each other;
4. the motion of filler has improved mass transfer condition of nutrient substances between the biofilm surface solid, liquid two-phase, improves nitration reaction efficient, and ammonia nitrogen removal efficient height is stable;
5. simple in structure, manufacturing and operating cost is low, floor space is little, the scope of application is extensive.
Description of drawings
For can clearer understanding purpose of the present invention, characteristics and advantage, below with reference to accompanying drawing preferred embodiment of the present invention is described in detail, wherein:
Fig. 1 is the structural representation of siphoning reciprocating type biofilter of the present invention;
Fig. 2 is used for the structural representation of recirculation system for filter of the present invention;
The change in concentration of siphoning reciprocating type biofilter run duration ammonia nitrogen of the present invention, nitrite nitrogen when Fig. 3 is the aquaculture system periodic duty;
Fig. 4 is that siphoning reciprocating type biofilter flow of inlet water of the present invention is to installing nitrated Effect on Performance;
Fig. 5 is the change curve of suspended particulate substance in the water body (TSS) and ammonia nitrogen surface removal load; And
Fig. 6 for the motion of filler in the siphoning reciprocating type biofilter to installing nitrated Effect on Performance.
Embodiment
See also Fig. 1, in the present embodiment, the siphoning reciprocating type biofilter that is used for aquaculture system is formed by purifying cavity 1, inlet pipeline 2, water distribution orifice plate 3, grid 4, base plate 7, siphoning installation 5, outlet pipeline 6, siphon destructing tube 8 and blowoff line 9.
Wherein, purifying cavity 1 is cylindrical cavity, and its diameter is 30cm, and effective depth (water distribution orifice plate 3 is to base plate 7) is 50cm.
Water distribution orifice plate 3 is fixed in the top that purifies in the cavity 1, a plurality of holes that evenly distribute it on, the aperture is 1.5mm, with allow water to be clean that top inlet pipeline 2 flows out to enter to purify cavity 1 interior and with filler (not shown) even contact.
In other embodiments, water-distributing device of the present invention can also be other modes, be not limited only to the water distribution orifice plate in the present embodiment, also can realize the present invention as a series of equally distributed nozzles, the water-distributing device purpose is in order to allow water to enter the purification cavity, and to contact to good with uniform filling.
Between water distribution orifice plate 3 and the base plate 7, fix two grids 4 respectively in the purification cavity 1 of present embodiment at the 15cm place of distance water distribution orifice plate 3 and base plate 7.Grid can slow down the rate of climb of filler in the water level uphill process, increase the time of staying of sewage at filling surface; Simultaneously, filler forms the stirring of water and filler through in the process of grid in cavity, not only can improve the operating efficiency of purifier, has also prevented the appearance of short flow phenomenon; Stirring between filler particles helps removing the pollution that causes owing to reasons such as microbial death, suspended particulates with mutual friction mutually, thereby can make biomembrane maintain a basicly stable duty, also makes biological possibility of jamming be reduced to minimum.
In the present embodiment, grid 4 is made up of crisscross pvc pipe, and grid 4 is that circle purifies cavity 1 internal diameter to cooperate, and the external diameter of pvc pipe is 20mm, and per two adjacent vertical or horizontal pvc pipes interval 60mm are to form open space.
In actual applications, the structure of grid is not limited only to the pvc pipe of present embodiment, and other grids of being made up of several horizontal and vertical bars also can be realized the present invention; This bar both can be a straight-bar, also can be the body of rod with definite shape; Its material also can be the anticorrosion barrier material of stainless steel, other high molecular polymers or the like.As long as can play aforementioned purpose can use.
Filler of the present invention is selected EPS (expanded polystyrene (EPS)) for use, and in order to obtain largest specific surface area, its shape preferably is a circular granular, and particle diameter preferably is 1-3mm.The particle diameter of filler particles is more little, and specific surface area is big more, and nitrification efficiency is high more, but little filler can increase the uncontrollability of filter, and the operability of filter is descended, and therefore, present embodiment is selected the EPS particle of 3mm particle diameter, surface attachment nitrifying bacteria for use.The filler EPS circular granular of selecting for use in the present embodiment, its concrete parameter is asked for an interview table 1.
Table 1EPS filler parameter
Annotate: ω=[V (1-ε)/(4/3 π r
3) 4 π r
2]/V, V=packing layer volume; R=radius filler mean value; ε=filler porosity, ε pH-value determination pH are 0.42
The EPS packing layer accounts for and purifies 52% of cavity 1 effective depth, can fully contact with waste water and react like this, improves ammonia nitrogen removal efficient.On the other hand, the aperture is less than packing material size on water distribution orifice plate 3 and the base plate 7, and the assurance filler can not run out of system.In addition, the EPS filling surface can also be attached with various bacteria such as heterotrophic bacteria, nitrite bacteria, nitrifying bacteria and denitrifying bacteria, and can make by existing means.
Siphoning installation 5 has inverted U pipeline section 51 and water storage pipeline section 52, its internal diameter is 60mm, inverted U pipeline section 51 communicates with purification cavity 1, and be located at the below of base plate 7, inverted U pipeline section 51 in the present embodiment is to be provided with the form that deeply purifies cavity 1, but be not limited only to this mode, the highest point of inverted U pipeline section 51 is lower than water distribution orifice plate 3; Communicate with outlet pipeline 6 with water storage pipeline section 52 other ends that inverted U pipeline section 51 joins, and will be higher than the joint of itself and inverted U pipeline section 51, and near itself and outlet pipeline 6 joints, be provided with gas outlet 53 upwards with the position of outlet pipeline 6 joints.
In other embodiments, siphoning installation can be not and outlet pipeline UNICOM yet, and set out the mouth of a river separately, as long as this delivery port is lower than the bottom that purifies cavity, the UNICOM of siphoning installation and outlet pipeline is in order to allow the structure of system oversimplify more in the foregoing description.
Siphon destructing tube 8 is a siphunculus, its two ends communicate with purification cavity 1 and inverted U pipeline section 51 respectively, it is located at the top of base plate 7, and be preferably the below that is positioned at second grid 4, like this, water level can drop to below second grid 4 when siphonage, so that filler can carry out contact-impact with second grid 4.
Blowoff line 9 is to be deposited in the dirt that purifies cavity 1 bottom in order to remove, as the solid particulate matter in the waste water etc.
It should be noted that; the pipeline that the siphoning installation of present embodiment is made up of inverted U pipeline section and water storage pipeline section; but the present invention is not limited only to this embodiment, and any other devices that can realize the filter siphonage or equipment all can be used as alternative, and within protection scope of the present invention.
The siphoning reciprocating type biofilter method of operation and the principle that are used for aquaculture system of present embodiment are as follows:
Inject breeding wastewater by inlet pipeline 2 to purifying cavity 1 with water pump, waste water is sprayed on the packing layer by water distribution orifice plate 3; When waste water flows into base plate below 7 and behind the inverted U pipeline section 51 of water level arrival outlet pipeline 6 and siphoning installation 5, discharge by outlet pipeline 6 on one side, on one side along with the rising that purifies water level in the cavity 1, water level in inverted U pipeline section 51 tedges also rises simultaneously, the compression of air in the inverted U pipeline section 51, the water seal that makes air in the inverted U pipeline section progressively pass water storage pipeline section 52 is discharged from gas outlet 53; When water level arrives inverted U pipeline section 51 tops, water begins to flow in the water storage pipeline section 52 by inverted U pipeline section 51 down-comers, water level continues to rise in the cavity 1 along with purifying, when water level is higher than inverted U pipeline section 51 top 5cm, the more water yield flow into water storage pipeline section 52, and makes the water level in inverted U pipeline section 51 down-comers rise, and the gas in the inverted U pipeline section 51 can be discharged by gas outlet 53 fully at last, thereby make to be full of water in the siphoning installation 5, siphonage produces thus; Continue to rise to when being higher than inverted U pipeline section 51 top 10cm when purifying cavity 1 water level, siphoning installation reaches the flowing full state, and water is discharged the purification cavity at a high speed by siphoning installation; When purification cavity 1 water level drops to the position of siphon destructing tube 8, siphon destructing tube 8 can suck air in the inverted U pipeline section 51 of siphoning installation 5 from purifying cavity 1, destroys siphon, and siphonage just interrupts automatically, draining stops, and purifies cavity 1 interior water level and rises once more; The cyclic process of the rise and fall of water level in the repetitive decontamination cavity 1 realizes the automatic and continuous operation of cavity.
Filler is filled between water distribution orifice plate 3 and the base plate 7.After current entered and purify cavity 1, filler will be submerged, and owing to the buoyancy reason, filler can be along with the water surface passes grid in cavity; When the water in purifying cavity 1 was released, owing to the gravity reason, filler can pass grid again and fall.Pumping of packing layer integral body, and the setting of grid make and produce relative displacement between the filler, and pass through each other friction, extruding, improve reaction efficiency.
It should be noted that:
1. in the process of purifier operation, flow of inlet water remains unchanged, and outlet pipeline 6 remains draining, drain discharge Q
Out1Remain unchanged;
2. purify in the cavity 1 interior water level uphill process, water level reaches its upper limit position, flow of inlet water Q in purifying cavity 1
InAll be greater than water flow Q
Out1, this process duration is 1-10min; Purify in the cavity 1 interior water level depression process, water level reaches its lower position in purifying cavity 1, flows out the current (Q in this chamber
Out1+ Q
Out2) all be greater than flow of inlet water Q
In, this process duration is 0.5-5min;
3. when water level is higher than the inverted U pipeline section top 5cm of siphoning installation in the purification cavity, form siphon; Be higher than 10cm when above, siphoning installation reaches the flowing full state, realizes the high speed draining.
To beneficial effect of the present invention be described by a concrete experimental example below:
1 materials and methods
1.1 test purifier configuration
Test purifier diameter 30cm, effective depth 50cm; Purify and fill the EPS filler in the cavity, particle diameter is 3mm, bed stuffing height 26cm (referring to the configuration of Fig. 1 embodiment).Water pump drives water inlet, adopts the form of drip down to be sprayed on the packing layer, and temperature remains on 29 ± 1 ℃.Aeration not in the process of the test.
1.2 the choice of purifier outlet pipeline caliber and siphoning installation pipeline caliber
Design flow of inlet water Q
InBe 6m
3/ h, water flow Q
Out1Be 3m
3/ h, siphon flow Q
Out2Be 8m
3/ h.
The conservation of energy according to the short tube free discharge is tried to achieve:
In the formula, Q is flow in the pipe; V is a velocity in pipes; H is an acting head; μ
cDischarge coefficient for pipeline.
As calculated, the outlet pipeline internal diameter is selected 25-40mm for use; Siphoning installation pipeline internal diameter is selected 40-75mm for use.
1.3 experimental scheme
Set up a cover circulating water cultivation pilot system according to Fig. 2 embodiment, in culturing the pond, put jewel perch (Jade perch) in a suitable place to breed, the ammonia nitrogen that daily metabolism by the throw something and feed feed and the shoal of fish produces is as pollution source, measure the change in concentration of ammonia nitrogen, nitrite nitrogen every day, research and inquirement water is cultured under the normal running environment of the circulatory system, the operational effect of this purifier.
Please continue to consult Fig. 2, the recirculation system that present embodiment is used for aquaculture system comprises breed pond 12, dirty row's current divider 13, swirl separator 14, regulating reservoir 15 and siphoning reciprocating type biofilter 11.Wherein, siphoning reciprocating type biofilter 11 uses the siphoning reciprocating type biofilter of Fig. 1 embodiment; Dirty row's current divider 13 is located at the bottom of culturing pond 12; Is to be connected by pipeline to pass through swirl separator 14 and regulating reservoir 15 successively from culturing pond 12 to siphoning reciprocating type biofilter 11, and squeezes into by water pump 16 again; 11 of siphoning reciprocating type biofilters are directly to carry back by pipeline or water pump to culture pond 12.The effect of used dirt row current divider 13 is that the solid particle of culturing the bottom, pond is collected swirl separator in this test, and the effect of swirl separator 14 is to remove solid particle, and the effect of regulating reservoir 15 is regulating system temperature and pH value.
2 results
2.1 the startup of purifier and operational effect under the circulating water cultivation environment
The circulating water cultivation pilot system is formed by culturing pond, dirty row's current divider, swirl separator, regulating reservoir and siphoning reciprocating type biofilter etc.The about 1.6m of the total water body of system
3, culture one in pond, the about 1.3m of water body
3Systemic circulation discharge 3.0m
3/ h, the hydraulic detention time 1.5min of purifier is by adding NaHCO
3The pH value is controlled at 6.8～7.2.The whole culture experiment cycle is divided into biofilm phase, impact proof phase and steady operation period.During the biofilm, adopt the low stating with load of culturing, dropping into cultivation density when initial is 7kg/m
3, after system's maturation, improve breed and be loaded to 20kg/m
3, after system is stable once more, will cultures load and finally be increased to 38kg/m
3Duration of test, feeding rate is 1%.
See also Fig. 3, as can be seen, the startup of purifier is rapider, there are some researches show that the limnobios filter can set up nitrification function in 10～20 days, and by comparison, the biofilm phase of the purifier among the present invention is shorter, only is 8 days.After biofilm was finished, the raising of culturing load had caused certain impact to purifier, and ammonia nitrogen concentration increases suddenly, but the nitrite nitrogen change in concentration is little.Because the ratio rate of rise of Nitrosomas is much smaller than the ratio rate of rise of nitrobacteria, so finish the initial stage at the nitrification function structure, the quantity of the Nitrosomas in the biomembrane is still unstable, just can reach dynamic equilibrium after a couple of days.Load improved back 4 days, and ammonia nitrogen concentration reaches peak value, is dropped rapidly to 0.6mg/L afterwards, and the after-purification device recovered stable in 8 days.Improve once more and culture load, obvious change does not appear in water quality, and purifier progressively tends towards stability, and in after this 52 days breed phase, ammonia nitrogen concentration is stabilized in 1.6mgL
-1Below, the nitrite nitrogen concentration stabilize is at 0.9mgL
-1Below.
.2.2 flow of inlet water changes the influence to the purifier nitrification effect
Please continue to consult Fig. 4, Fig. 4 is employing 2.1mg/L influent concentration, under the different flow of inlet water, and the nitrated situation of purifier.HRT (hydraulic detention time) is all influential to ammonia nitrogen removal frank and removal load as seen from Figure 4.Along with the increase of HRT, biomembrane prolongs with water inlet time of contact, and ammonia nitrogen removal frank begins to rise, and behind HRT＞10min, ammonia-N removal rate is higher than 60%, 49% when the dropping to HRT=1.5min but ammonia nitrogen removal is loaded.This shows the HRT that increases purifier, though can make result more stable, can cause the decline of actual treatment amount.In order to guarantee the efficient of reactor, suggestion is decided to be 2～3min with hydraulic detention time in actual applications, so both can guarantee the treatment effect of reactor, can make the reciprocating motion of filler keep higher speed again, realizes the self-purification function of filter.
2.3 suspended particulate (TSS) is to the influence of purifier nitrification effect
Engineering practice data in the past shows that the suspension in the water covers biomembranous surface easily, influences the carrying out of biological oxidation, thereby causes the decline significantly of nitrification effect.Investigate whether the present invention is produced same influence for suspension, the concentration of TSS is controlled, monitor the situation of change of water quality under the different TSS concentration by being provided with of physical cleaning equipment (swirl separator) in the recirculation system.As shown in Figure 5, water inlet TSS excursion is 6～33.2mg/L, and ammonia nitrogen filling surface load remains on 0.5～0.6gm substantially
-2D
-1Between, the variation with water inlet TSS does not change.In the process of packing layer along with the rising of water level and decline, the high speed of filler moves back and forth friction and the extruding that has aggravated between filler and the filler, and the dirt that sticks to filling surface is come off, and is deposited to container bottom.Experimental session, ammonia nitrogen filling surface load is not subjected to the influence of TSS substantially, and this explanation adopts purifier of the present invention can overcome the biological contact oxidation pond of elastic filler and the shortcoming that the biofilter is influenced by suspended particulate, but guarantees the practicality on engineering.
Fig. 6 stops to move back and forth the ruuning situation of post-reactor for filler.Filler moves back and forth and obviously to influence treatment effect, and after the reciprocating motion of filler stopped, the efficient of purifier slowly descended, and the ammonia nitrogen removal after 6 days is loaded and is reduced to original 27.1%.After this recover the filler motion, the nitrification efficiency of reactor is anti-rapidly to be risen, and reaches the treatment effeciency before motion stops after 2 days.This shows the rotation of the filler that siphoning reciprocating type biofilter of the present invention is realized and the cutting of current, not only can improve the waterpower situation of filling surface, improve the mass-transfer efficiency of (microorganism, dissolved oxygen and pollutant) between the biological treatment three elements, can also accelerate the biofilm and the demoulding speed of filler, improve biomembrane activity.
The ammonia nitrogen removal load of traditional biological filter is generally less than 200gm
-3D
-1, purifier of the present invention is 29 ± 1 ℃ in temperature, the influent ammonia nitrogen load is 3.891kgm
-3D
-1Situation under, ammonia nitrogen removal load can reach 642kgm
-3D
-1
In sum, the siphoning reciprocating type biofilter that is used for aquaculture system provided by the invention has the advantage of stability and high efficiency.
Claims (16)
1. the biological purification method of an aquiculture waste water is characterized in that, may further comprise the steps:
A. with waste water from continue to pour in the purification cavity of the biofilter that the buoyancy filler is housed;
B. outlet pipeline draining, and drainage discharge is less than inflow, water level rises the buoyancy filler in the cavity along with purifying, and purifies the siphoning installation water level that cavity links to each other with outlet pipeline and rises simultaneously;
C. purify the interior water level of cavity and be higher than the siphoning installation top, siphonage produces;
D. purify in the cavity water by outlet pipeline and siphoning installation outwards draining in the lump, and drainage discharge is greater than inflow, the buoyancy filler with purify that water level reduces simultaneously in the cavity;
E. destroy siphon, siphonage stops, and siphoning installation stops outside draining;
F. repeat above-mentioned steps.
2. the biological purification method of aquiculture waste water according to claim 1, it is characterized in that: step e sucks air in the siphoning installation, and siphonage stops, and siphoning installation stops outside draining.
3. the biological purification method of aquiculture waste water according to claim 2, it is characterized in that: the step b duration is 1-10min, the steps d duration is 0.5-5min.
4. siphoning reciprocating type biofilter that is used for the biological purification method of the described aquiculture waste water of claim 1, it is characterized in that: it comprises purification cavity, inlet pipeline, buoyancy filler, siphoning installation and outlet pipeline, described buoyancy filler is located at and is purified in the cavity, described inlet pipeline is positioned at and purifies the cavity top, and described outlet pipeline and siphoning installation all communicate with the purification cavity.
5. siphoning reciprocating type biofilter according to claim 4 is characterized in that: the delivery port of described outlet pipeline and siphoning installation all is lower than the bottom that purifies cavity.
6. siphoning reciprocating type biofilter according to claim 5 is characterized in that: described siphoning installation is the pipeline with inverted U pipeline section, described inverted U pipeline section and purification cavity UNICOM.
7. siphoning reciprocating type biofilter according to claim 5, it is characterized in that: the pipeline that described siphoning installation is made up of inverted U pipeline section and water storage pipeline section, described inverted U pipeline section and purification cavity UNICOM, water storage pipeline section and outlet pipeline UNICOM, the position of described water storage pipeline section and outlet pipeline joint is higher than itself and inverted U pipeline section joint, and is provided with gas outlet upwards near itself and outlet pipeline joint.
8. according to each described siphoning reciprocating type biofilter of claim 6 to 7, it is characterized in that: described siphoning reciprocating type biofilter also has siphon destructing tube, described siphon destructing tube is a siphunculus, the one end communicates with purifying cavity, and its other end communicates with the inverted U pipeline section of siphoning installation.
9. siphoning reciprocating type biofilter according to claim 8 is characterized in that: also be provided with one or more grids in the described purification cavity, described grid is crisscross structure, the vertical or horizontal interval 50-70mm that it is adjacent.
10. siphoning reciprocating type biofilter according to claim 9 is characterized in that: also be provided with water-distributing device in the described purification cavity, it is positioned at grid top and inlet pipeline below.
11. siphoning reciprocating type biofilter according to claim 10 is characterized in that: described water-distributing device is the water distribution orifice plate, has a plurality of holes on it, and the aperture is 1-2mm.
12. siphoning reciprocating type biofilter according to claim 11, it is characterized in that: also be provided with base plate in the described purification cavity, described base plate is positioned at the top that grid below and outlet pipeline and siphoning installation and purification cavity join, have a plurality of holes on the described base plate, and the aperture is 1-2mm, and described buoyancy filler is between water distribution orifice plate and base plate.
13. siphoning reciprocating type biofilter according to claim 12 is characterized in that: described siphon destructing tube is positioned at the base plate top with purification cavity joint, and in the grid below.
14. siphoning reciprocating type biofilter according to claim 12 is characterized in that: described buoyancy filler is circular EPS filler, and its density is 20-60kg/m
3, its particle diameter is 1-4mm, and its particle diameter is not less than the aperture in hole on water distribution orifice plate and the base plate, described buoyancy filling surface attached biological film.
15. siphoning reciprocating type biofilter according to claim 14 is characterized in that: the height of described buoyancy packing layer in purifying cavity accounts for the 40-70% that purifies cavity.
16. siphoning reciprocating type biofilter according to claim 8 is characterized in that: described purification cavity bottom also is provided with blowoff line.
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| CN2009101996875A CN101717149B (en) | 2009-11-30 | 2009-11-30 | Biological purification method of aquiculture waste water and siphoning reciprocating type biological filter |
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| CN2009101996875A CN101717149B (en) | 2009-11-30 | 2009-11-30 | Biological purification method of aquiculture waste water and siphoning reciprocating type biological filter |
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| CN101717149A CN101717149A (en) | 2010-06-02 |
| CN101717149B true CN101717149B (en) | 2011-12-28 |
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| CN105060480B (en) * | 2015-09-09 | 2017-06-30 | 陕西科技大学 | ASBR tank level control systems and control method |
| CN107027687A (en) * | 2017-05-22 | 2017-08-11 | 浙江北冥有渔环境科技有限公司 | Potential energy circulating water culture system |
| CN109122545A (en) * | 2018-09-25 | 2019-01-04 | 沙湾县江丰水产养殖有限公司 | A kind of pond bottom blowdown water quality improvement system |
| CN113582343A (en) * | 2021-08-26 | 2021-11-02 | 北控水务(中国)投资有限公司 | Method for stably realizing shortcut nitrification anaerobic ammonia oxidation process |
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