CN1230389C - Method and device for treating high concentration waste water - Google Patents
Method and device for treating high concentration waste water Download PDFInfo
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- CN1230389C CN1230389C CN 00117854 CN00117854A CN1230389C CN 1230389 C CN1230389 C CN 1230389C CN 00117854 CN00117854 CN 00117854 CN 00117854 A CN00117854 A CN 00117854A CN 1230389 C CN1230389 C CN 1230389C
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Abstract
The present invention provides a sewage treating method and a device thereof for economically treating waste water with a high concentration and particularly the waste water of livestock industries and organic industrial waste water with high efficiency by using soil microbes. The sewage treating device is composed of a storage tank, an anaerobic fermenter, a microbe activating tank, a mixing tank, an aeration tank, a denitrifying tank, a primary sedimentation tank, a coagulation sedimentation tank and a dehydrator. The sewage treating method comprises a concentration and flow quantity homogenizing procedure, a dephosphorizing and microbe activating procedure, an aerobic microbe activating procedure, a mixing procedure, a dephosphorizing and ammoniac nitrogen denitrifying procedure, a denitrifying procedure, a separation process and a residue phosphorus and suspended solid content removing procedure.
Description
The present invention relates to utilize soil microorganisms efficiently purifying treatment contain high-enriched organics, the particularly method of wastewater treatment and the device of the animal industry waste water of nitrogen and phosphorus or organic property industrial wastewater.
Have recognized that animal industry waste water or organic property industrial wastewater be can in peripheral water system, cause the major cause of environmental pollution such as eutrophication, it is handled jointly with the industry size utilization or indivedual purification facility is handled., handle the occasion of field jointly, because the design of unsuitable load at animal industry waste water, almost major part can not be brought into play original function, in the occasion of indivedual purification tanks,, can not bring into play a lot of of original function owing to the adaptability deficiency that produces waste strength according to animal house type and poultry kind.In addition, compare because the investment cost that animal industry waste water or organic property industrial wastewater are handled is excessive, be difficult to guarantee the competitive power of industry with the related industries scale.
In general, the processing about the high concentration slurry shape waste water of picture animal industry waste water is suitable for several different methods such as anaerobism digestion method, active puddling and oxidation pond process.For example, Jose R.Bicudo and IvoF.Svoboda, " Intermittent aeration of pig slurry-farm scaleexperiments for carbon and nitrogen removal " Wat.Sci.﹠amp; Tech.Vol.32.No.12 has reported the result who handles pig house waste water in dilution intermittent aeration mode among the pp83-90 (1985)., utilizing such purifying treatment, is the occasion more than the 0.8kg-BOD/kg-Mv/d at F/Mv than (the matrix rate of load condensate of per unit microbial quality and time per unit in the reactive tank), and nitrated resistance phenomenon takes place.
On the other hand, Cintoli, C., Di Sabantino, B., Galeotti, L. and Bruno, G., " Ammonia uptake and treatment in UASB reactor of piggerywastewater ", Wat.Sci.﹠amp; Tech.Vol.32, No.12 discloses among the pp76-83 (1995) after the separation of pig house waste water centrifugal, removes NH with zeolite with ion exchange method
4 +, cover (UASB with upwelling anaerobism mud dress; Upflow Anaerobic Sludge Blanket) mode and UASB-anaerobism filter type reach and remove COD 95%, and TN 90%, the level of TP 80%.In addition, Bortone, G., Gemeli S. and Rambaldi A., " Nitrification, denitrification andbiological phosphate removal in SBR treating piggery wastewater ", Wat.Sci.﹠amp; Tech.Vol.26, No.5 has reported among the pp 977-985 (1992) after the separation of pig house waste water centrifugal, handles with batch reactor, reaches and removes COD 93%, TN 93%, the result of the level of TD 95%.Yang, P.Y., Chen, H., Kongsrich_reon, N, and Polprasert, C., " A swine waster package biotreatment plant for the tropics ", Wat.Sci.﹠amp; Tech., Vol.28, No.2 has reported in small-scale pig house the result with simple anaerobism art breading high-concentration waste water among the pp 211-218 (1993).Martin, J.H.and Loehr, R.C., " Aerobic treatment of poultry wastes ", and J.Agri.Eng.Res, Vol.21, pp 157-167 has reported the result who handles tame poultry waster water with the oxidation channel process in (1978).
, disclosed wastewater treatment example in the above-mentioned document, removing anaerobism digestion method major part is to finish as object with the waste water of dilution.So, being used for animal industry waste water on a small scale, the state of waste water has suitable difference, requires more to improve.
In addition, animal industry waste water or fecaluria generally are familiar with as the major cause of water system eutrophication., can not remove as this eutrophication class environmental problem to remove in original treatment facility that organism is the center.So, for improving the processing efficiency of animal industry waste water, address the above problem, in original facility, introduce the also B of applications exploiting microorganism active agent
3Or the such technology of bio-reactor (Bioreactor), the running expense of not only relevant with supply of microbial preparation etc. treatment facility is uneconomical, and, since facility main to as if handle organism, can not suitably remove the nitrogen compound and the phosphorus compound of eutrophication reason material.B
3Be the abbreviation of Bio Best Bacillus System, B
3Method is only to select to cultivate the gram-positive Bacillus bacterium of one of thread fungus as the variation of original aerobic digestion method, optimizes and guide the method for removal organism and nutrient salts.In order to improve the activity of this bacterium, inject specific inorganic nutrients composition artificially with the microorganism active agent.Therefore, this method of real world applications has many problems.
Therefore, the purpose of this invention is to provide method of wastewater treatment and the device that efficiently to handle high-concentration waste water.
Another object of the present invention provides the treatment process and the device that can utilize the soil microorganisms economical and efficient to handle animal industry waste water and organic property industrial wastewater.
Another object of the present invention provides the soil microorganisms that utilizes solid substanceization, for modifying device to waste strength adaptability jumpy, not only contain organism with the efficient processing of cheap expense, and contain the method for wastewater treatment and the device of the nutrient salts of high concentration N and phosphorus.
Further object of the present invention provides applicable to waste water generation facility at the bottom of the small-scale, because the common processing of animal industry waste water can be saved processing costs, solves the method for wastewater treatment and the device of the economical and efficient of the pollution problem that takes place in the treating processes.
For achieving the above object, method of wastewater treatment of the present invention is characterised in that and may further comprise the steps:
(a) will from waste water, be kept in the storagetank by the liquid effluent of solid-liquid separation, make the operation of concentration and flow homogenizing;
(b) in the anaerobic fermentation groove, utilize anerobe will be in storagetank difficult decomposing organic matter in the liquid effluent of homogenizing be hydrolyzed into the follow-up microorganism state of picked-up easily, and with dephosphorization microorganism activatory operation;
(c) will in this microorganism activated bath, select activation and increase biological adsorptive power from the aerobic microorganism in aerator tank is transported to mud the microorganism activated bath, by making the microorganism growth of filling in the bacterium soil (bio-clod), make aerobic microorganism activatory operation;
(d) will accept the effluent liquid of the microorganism activated bath of solid substance soil microorganisms, the effluent liquid of above-mentioned anaerobic fermentation groove and transport mud and filtrate blended operation in tempering tank;
(e) above-mentioned mixed solution is imported dissolved oxygen concentration adjustable type aerator tank, handle organism and phosphorus, and the operation that ammonium-nitrogen is nitrated;
(f) under anaerobic state, utilize interior the giving birth to of microorganism to breathe the liquid that in aerator tank, to handle, the operation of carrying out the itrated compound denitrogenation;
(g) in the primary sedimentation groove, the liquid separation of denitrogenation processing is become the operation of mud and supernatant liquor; And
(h) in the coagulation sedimentation groove, from the primary sedimentation groove, remove the solid substance of residual phosphorus and suspension in the supernatant liquor of precipitate and separate, and emit the operation for the treatment of water.
In addition, wastewater treatment equipment of the present invention is characterised in that and comprises:
(A) will be from waste water solid-liquid separation the liquid effluent storage and make the storagetank of concentration and flow homogenizing;
(B) be positioned at above-mentioned storagetank downside and have the anaerobic fermentation groove of anerobe;
(C) have the inside active channel of accommodating bacterium soil and the microorganism activated bath of diffuser (gas distributor);
(D) have the mentioned microorganism activated bath of inflow and above-mentioned anaerobic fermentation groove effluent liquid separately and transport the influx of mud and filtrate, accommodate from the inflow of above-mentioned influx and the tempering tank of mixed house;
(E) be connected the dissolved oxygen adjustable type aerator tank in above-mentioned tempering tank downstream side;
(F) be connected the denitrifying tank in above-mentioned aerator tank downstream side;
(G) be connected the primary sedimentation groove in above-mentioned denitrifying tank downstream side; And
(H) be connected the coagulation sedimentation groove in above-mentioned primary sedimentation groove downstream side.
Below, the object lesson of reference wastewater treatment equipment of the present invention shown in the drawings explains method of wastewater treatment of the present invention and device.
Fig. 1 is the pie graph of animal industry wastewater treatment equipment of the present invention.As shown in Figure 1, wastewater treatment equipment of the present invention (10) is by storagetank (20), anaerobic fermentation groove (30), microorganism activated bath (40), tempering tank (50), aerator tank (60), denitrifying tank (70), primary sedimentation groove, and for example multiple tilting settling bath (80), coagulation sedimentation groove (90) and better water extracter (100) in addition constitute.
(A) storagetank (20) is accommodated the liquid effluent that the waste water that is produced by animal house passes through solid-liquid separation and discharge, supplies with anaerobic fermentation groove (30) with concentration and the homogenized processing waste water of flow.
(B) anaerobic fermentation groove (30) anaerobism activation dephosphorization microorganism, and will be from the hard-decomposed organic hydrolysis the processing waste water that storagetank (20) flows into.
(C) in microorganism activated bath (40), drop into as the bacterium soil (42 that can be fit to the microorganism supply source effect of high-concentration waste water; Bio-clod), only the aerobic microbial selective is activated at this.
(D) tempering tank (50) mixes with the mud that transports with the waste water handled in the anaerobic fermentation groove (30) with from the effluent liquid of microorganism activated bath (40), and delivers to aerator tank (60).
(E) aerator tank (60) utilizes the substance metabolism effect of microorganism will be from organism and the ammonium-nitrogen oxygenolysis the waste water that tempering tank (50) flows into.
(F) denitrifying tank (70) has influx and the inner filtering material that contacts that the aerator tank treatment solution flows into, and utilizes the interior living respiration that is contained in the microorganism in the mixed solution, removes denitrification from the oxynitride of the liquid of processing aerator tank (60).
Settling bath comprises (G) primary sedimentation groove and (H) coagulation sedimentation groove (90), wherein brings into play for example multiple tilting settling bath (80) of primary sedimentation groove function.Multiple tilting settling bath has the influx and the spout of the supernatant liquor inflow of processing, and the waste water solid of denitrogenation processing is separated into solid substance and supernatant liquor.The coagulation sedimentation groove is removed residual phosphorus and solid substance from the supernatant liquor of multiple tilting settling bath (80).
The residue dehydration of the mud sample that water extracter (100) will produce in coagulation sedimentation groove (90).
In addition, the microorganism mud stream that in wastewater treatment equipment of the present invention (10), forms aerator tank (60) in a subtle way bioactivation groove (40) first transport circuit b, the mud of denitrifying tank (70) flows into microorganism mud that second of tempering tank (50) transports circuit c and multiple tilting settling bath (80) and flows into the 3rd of anaerobic fermentation groove (30) to transport circuit d be ideal.
Moreover, in wastewater treatment equipment of the present invention (10), form handle the filtrate that produces when making in water extracter (100) slurry dewatering flow into the 4th of tempering tank (50) transport circuit e and make for the concentration of regulating storagetank (20) in necessary occasion multiple tilting settling bath (80) treating water inflow storagetank the 5th to transport circuit i be ideal.
Method of wastewater treatment of the present invention uses above-mentioned wastewater treatment equipment, and the following of representative carries out.
That is, before handling, at first with solid-liquid separation such as the animal industry waste water that produces in the animal house etc. and fecalurias with wastewater treatment equipment (10).High-enriched organics, nitrogen compound and the phosphorus compound etc. that in the liquid effluent that produces by solid-liquid separation, contain hard-decomposed organic.
(a) concentration, flow homogenizing operation
Such waste water is imported storagetank (20) and storage, and for example for the about 1.5 times flow of the per day flow of waste water, the scale of about 2 days degree is provided with storagetank by the residence time.In case of necessity, along the 5th treating water that transports the multiple tilting settling bath (80) that route i flows into, the concentration of waste water is discharged with certain concentration and flow after regulating in the storagetank.Utilize pump (not shown) etc. will keep certain density waste water to pump into anaerobic fermentation groove (30) along the circuit shown in the arrow a among Fig. 1.
(b) dephosphorization microorganism activation procedure
Fig. 2 shows the structure of anaerobic fermentation groove (30) briefly.Provide anerobe in this anaerobic fermentation groove inside, the organism that will contain from the waste water that storagetank (20) flows into utilizes the substance metabolism effect of anerobe to decompose.Particularly, the hard-decomposed organic that will contain in waste water is hydrolyzed into the aerobic microorganism panning and is easy to state, and the phosphorus ingested microorganisms is emitted intravital phosphorus as the energy, and the organism of organic acid form is preserved in vivo.That is, in wastewater treatment equipment of the present invention because in the anaerobic fermentation groove, suitably regulate the organic load of machinery systems, so this utilizes the decomposition process of anerobe to become the pretreatment procedure of handling the operation of phosphorus in aerator tank (60).
Anaerobic fermentation groove (30) shown in Figure 2 is upright round shape, has the 1st influx (36) at an upper portion thereof, for guaranteeing the 2nd influx (37) that the dephosphorization microorganism flows into from multiple tilting settling bath (80) along the 3rd mud that transports circuit d and the spout (38) of emitting the waste water that ferments with the anaerobism state from the waste water inflow of storagetank (20).
For heating its inside, the wall of anaerobic fermentation groove (30) is made of the heat insulation wall (34) of built-in electric coil (not shown).Galvanization in the electric coil in the heat insulation wall, anaerobic fermentation groove inside is heated to more than the temperature of regulation, because the temperature of the waste water of emitting by spout (38) and the temperature of following activatory dephosphorization microorganism remain on more than 30 ℃, can prevent the back operation aerator tank (60) in, handles during owing to external air temperature hangs down reduction such as the efficient that causes nitration reaction.
In addition, have in anaerobic fermentation groove (30) inside for anerobe and the effective blended agitating vane of waste water (32).Also have mud outlet valve (35), mud discharge baffle plate (33) and foam destroyer (31) in anaerobic fermentation groove inside.It is to discharge at the inner remaining mud residue of anaerobic fermentation groove that mud outlet valve and mud are discharged with baffle effect.The effect of foam destroyer is to remove the scum silica frost foam that forms on the top of anaerobic fermentation groove inboard.
That on the other hand, utilizes that Fig. 1 arrow d represents the 3rd transports the inside that circuit is transported to the sedimentary mud in multiple tilting settling bath described below (80) bottom anaerobic fermentation groove (30).Under the anaerobism condition of dephosphorization microorganism that this mud that transports includes, activate at the anaerobic fermentation groove.With the phosphorus in the microorganism cells with phosphate anion (PO
4 3-) form emit, and the organic acid in the anaerobic fermentation groove is put aside in vivo.Become the energy of finishing substance metabolism and absorb phosphorus in aerator tank (60), the dephosphorization microorganism panning in the aerator tank is than the much more phosphorus of the phosphorus amount of emitting in the anaerobic fermentation groove and remove.
Anaerobic fermentation groove (30) keeps anaerobic fermentation for generating organic acid, and does not carry out methanation, turns round according to about 1.5～2.5 days of the residence time degree of controlling the dephosphorization microorganism and wishes.
(c) activation procedure of aerobic microorganism
Fig. 3 shows the cross-section structure of microorganism activated bath of the present invention (40) briefly.Have the part of transporting on the top of this microorganism activated bath and contain mud and the inlet (45) that flows into of aerobic microorganism and discharge the relief outlet (46) that contains the outflow water of activatory aerobic microorganism in the microorganism activated bath, have collar plate shape diffuser (gas distributor) (41) in its bottom.In addition, has valve (43) in the bottom of microorganism activated bath for the residue of discharging this active channel inside.
Can transport circuit along first shown in Fig. 1 arrow b from aerator tank (60) outlet end according to following detailed explanation mud and supply to microorganism activated bath (40).Because extraneous air flows to microorganism activated bath inside by diffuser (41), the inner aerobic atmosphere that keeps of this microorganism activated bath only makes the aerobic microbial selective activation in the mud.
On the other hand, have the inside activated bath (44) that constitutes by the porousness wall in the inside of microorganism activated bath (40), in this inside activated bath, dropped into the bacterium soil (42 that contains the microorganism of in soil, extracting also independent bacillus (bacillus) microorganism belonging to genus of cultivating and ray fungi (actinomycets) and so on 1% weight ratio degree; The soil microorganisms carrier).
Be filled in activation and growth under the aerobic atmosphere of microorganism in microorganism activated bath (40) in the bacterium soil (42).The earth microorganism that has activated separates from bacterium soil, and with the microorganism activated bath in activatory aerobic microorganism, together discharge from relief outlet (46).And the microorganism that is filled in the bacterium soil has the viability that can be suitable for high-concentration waste water, and is as described below, contacts with the interior high-enriched organics of aerator tank (60) to show active substance metabolism effect.
Flow into transporting mud and may containing fungi of comprising thread fungus (filamentous) and so on of microorganism activated bath (40), hinder mud caking (bulking), the i.e. microorganism of solid-liquid separation.Can suppress the growth of this class mushroom under the aerobic atmosphere in the microorganism activated bath, the solid-liquid separation process of back is carried out smoothly.In addition, the microorganism of decomposing organic matter can be improved the biological adsorptive power of its organism owing to turn round with the overexposure gaseity in the microorganism activated bath.Generation for the microorganism that suppresses fungi and so on makes the activation maximization of aerobic microorganism, and the microorganism activated bath is wished with the residence time running of about 1.5～2.0 days degree.
(d) mixed processes
In tempering tank (50) with the waste water after in anaerobic fermentation groove (30), the handling of various trait, effluent from microorganism activated bath (40), and from aftermentioned denitrifying tank (70) via transporting the mud that pipe transports, and, send into the operation of aerator tank (60) in case of necessity from the filtrate Forced Mixing of water extracter (100).At this,, in aerator tank, cause the stepless action of activation microorganism owing to be mixed into the material of its nutriment in the microorganism that contains in the effluent from the microorganism activated bath equably.
(e) the nitrated operation of dephosphorization and ammonium-nitrogen
Fig. 4 is shown schematically in the structure of aerator tank (60), forms the opening (62) that flows into the mixture that obtains at tempering tank (50) at an end of aerator tank, forms the outlet (64) of discharging the waste water of handling in aerator tank at the other end.For prevention mud deposits in groove, to supply with other air mixing effect is successfully carried out, the aerator tank bottom is with the angle of regulation, as 7 ° of inclinations.Aerator tank inside is divided into a plurality of chambers by a plurality of next doors.For example, the inside of aerator tank shown in Figure 4 is divided into 4 chambers (60a, 60b, 60c, 60d) by 3 next doors (66).
By the inside of air inflow pipe (61) extraneous air inflow aerator tank (60), the inner aerobic atmosphere that keeps of aerator tank.The oxygen meltage of aerator tank inside remains on 0.5～2.0mg/L wishes.
On the other hand, in the nitrated occasion of carrying out fast of aerator tank (60).The content of the alkaline matter in the waste water becomes the major cause of the nitrated operation of restriction.For preventing so nitrated resistance phenomenon, it is ideal that the oxygen meltage of aerator tank inside keeps different each other values with compartment.For example, in the aerator tank of Fig. 4 structure, the inflow end of aerator tank and exit end with outlet with opening (62) separately in the 1st and the 4th compartment (60a, 60b) of position the oxygen meltage be maintained at about 1.5-2.5mg/L, flowing in the 2nd and the 3rd compartment (60b, 60c) of position between end and the exit end oxygen meltage, to remain on 0.5-1.5mg/L be special ideal.Keep 1.0～1.5mg/L at oxygen meltage in the 2nd compartment (60b) that flows into end, keeping 0.5-1.0mg/L in abutting connection with the middle oxygen meltage of the 3rd compartment (60c) of exit end is special ideal.Like this, owing to keep low relatively oxygen concentration of ordinary dissolution in the aerator tank, but inferior limit ground guarantees the aeration expense that aerobic is handled.
Because the substance metabolism effect of aerobic microorganism in the aerator tank, organic decomposition and denitrogenation and dephosphorization operation are as follows.
At first, make the aerobic microorganism in microorganism activated bath (40), press aeration condition activation after, flow into aerator tank (60) with the maximum rating of the biological adsorptive power of nutriment composition.At aerator tank since the organic decomposition reaction of the substance metabolism effect of aerobic microorganism represent with following formula:
[changing 1]
Increment by the new cell of the BOD that removes like this amount is about 0.5kg MLVSS/kg BODrem.
On the other hand, ammonium-nitrogen is following nitrated:
[changing 2]
Nitrated ammonium-nitrogen 1mg/L wants oxygen consumed 4.6mg O
2/ L and be equivalent to 7.1mg CaCO
3The alkaline matter of/L.As mentioned above, the the 2nd and the 3rd compartment (60b, 60c) between inflow end that is arranged in aerator tank (60) and exit end saves 0.5-1.5mg/l owing to the oxygen meltage is withered, particularly near the 1.0mg/l, suppressed anxious sharp nitrated, and can prevent because the insufficient nitrated resistance phenomenon of basicity.
Dephosphorization specification in the aerator tank (60) is as follows.That is absorb the phosphorus of relative volume when, in anaerobic fermentation groove (30), emitting synthetic cell matter constitute under the aerobic atmosphere of dephosphorization microorganism in aerator tank of intracellular phosphorus with the phosphoric acid form.For example, the phosphorus amount of dephosphorization microorganism panning keeps the ratio of about 1: 1.5 degree under the phosphorus amount that the dephosphorization microorganism is emitted with the phosphoric acid form in the anaerobic fermentation groove and the aerobic atmosphere in aerator tank.Like this, in the aerator tank during dephosphorization microorganism synthetic cell matter constitute since at endocellular phosphorus by excess ingestion (luxury uptake), finished the dephosphorization operation.
The dephosphorizing capacity that improves wastewater treatment equipment to use selectivity activatory dephosphorization microorganism in anaerobic fermentation groove (30) is the basis, can handle by the aggegation in following coagulation sedimentation groove (90), the drug consumption of demand in the dephosphorization operation is minimized, improve water quality.
Utilize in aerator tank (60) in the organic decomposition course of substance metabolism effect of aerobic microorganism, a part of mud transports circuit from the outlet (64) of aerator tank outlet end along first shown in Fig. 1 arrow b and is transported to microorganism activated bath (40).The mud that transports so as mentioned above, contains the aerobic microorganism.The waste water of handling in the aerator tank with microorganism blended state, flow into denitrifying tank by outlet via the inlet (77) of the denitrifying tank (70) of anaerobic state.
(f) denitrogenation operation
Fig. 5 shows the denitrifying tank (70) that is made of contact filtering material layer (70a) and mixolimnion (70b).In the contact filtering material layer, filled the contact filtering material (75) that makes aeration is handled in the aerator tank (60) mixed solution carry out denitrogenation.Nitrogen in the contact filtering material layer after the denitrogenation has mixolimnion (70b) degassing in the agitating vane (73), and the mixed solution after the denitrogenation is through the outflow dam (71 on upper strata; Weir), discharge by relief outlet (72).
The microorganism that flows into from aerator tank (60) and the mixed solution of waste water be by filling the contact filtering material layer (70a) of contact filtering material (75), and attached work contact such as microorganism filtering agent utilizes itrated compound limit in untreated organism and the waste water to carry out the denitrification reaction limit and grows.Because the growth of microorganic adhesion contact filtering material forms mud tectum (sludge blanket) in proper order at the contact filtering material layer, owing to carried out the solid-liquid separation effect that biological filteration has improved waste water and mud.
In denitrifying tank (70),,, carry out the denitrification reaction of following formula owing to utilize the interior living respiration of mud spissated microorganism in contact filtering material layer (70) owing to the untreated organism and the itrated compound that contain the mixed solution that flows into from aerator tank (60).
[changing 3]
In an example of result,, generate oxygen 2.86gO by the denitrogenation operation
2/ gN and alkaline matter 3.6g CaCO
3/ gN, the residence time of denitrifying tank is about 0.75～1.25 day degree, the denitrification percent of this operation is 0.03g N/g MLVSS/d.
In denitrifying tank (70) part of mud utilize the biological filteration of contact filtering material layer (70a) filter, separate, at the bottom post precipitation, transport circuit c through mud relief outlet (76) by the 2nd and be transported to tempering tank (50).Its result can make the microorganism concn in the aerator tank (60) keep certain.
Flow into the multiple tilting settling bath (80) of hypomere through the relief outlet (72) of denitrifying tank (70) through the waste water of denitrogenation operation.
(g) separation circuit
Fig. 6 is shown schematically in the structure as the representative multiple tilting settling bath (80) that uses of primary sedimentation groove.This multiple tilting settling bath has inner a plurality of inclination precipitation plates (85) and supports the pair of angled precipitation at these inclination precipitation plate two ends that mud reservoir position is precipitated in (86) and bottom.
Generally, removing each operation of nutrient substance, the occasion of mud residence time long running, owing to over oxidation cell loss of activity is disperseed, tiny cellular material does not precipitate, and promptly produces aciculiform throw out (pinfloc).For preventing that such aciculiform throw out is provided with multiple inclination precipitation plate (85), make with the contact area change of mud big.That is, the waste water that flows into multiple tilting settling bath (80), is crossed behind this precipitation plate again along next precipitation plate surface current to the upper reaches along the surface of inclination precipitation plate (85).Because it is a plurality of that the inclination precipitation plate is provided with, big with the contact area change of mud, suppressed the generation of aciculiform throw out.
After aeration processing and the denitrogenation processing, the processing waste water that flows into multiple tilting settling bath (80) becomes solid substance and supernatant liquor because of the gravity solid-liquid separation.As mentioned above, such solid-liquid separation is owing to the fungi growth that is suppressed at thread fungus (filamentous) and so in the microorganism activated bath (40) is improved.On the other hand, solid substance is in the lower end part precipitation of multiple tilting settling bath, and is remaining as mud.Mud is anaerobic state itrated compound residual concentration and is almost 0 state, and the dephosphorization microorganism becomes state more preferably.This mud transports circuit d and flows into anaerobic fermentation groove (30) from mud relief outlet (83) along the 3rd of Fig. 1, the dephosphorization microorganism in the mud is activated.
The supernatant liquor of the solid-liquid separation in the multiple tilting settling bath (80) flows into coagulation sedimentation groove (90) via top relief outlet (82), carries out medicine and handles to remove residual phosphorus and suspension solid substance fully.
(h) the removal operation of residual phosphorus and suspension solid substance.
Fig. 7 is shown schematically in an in-built example of coagulation sedimentation groove (90).In this coagulation sedimentation groove, be provided with the ingress pipe (92) that flows into from the supernatant liquor of multiple tilting settling bath (80) and be used to inject the injection tube (94) of the pharmaceutical chemicals of sulfuric acid or metal-salt and so on.For making supernatant liquor that flows into from ingress pipe and the bottom that is positioned at injection tube (94) from the suitable blended agitating vane of pharmaceutical chemicals (93) that injection tube flows into.In addition, be provided with isolated partition wall of predetermined distance (96,97,98) etc., formed mixing section, aggegation chamber and the precipitate and separate chamber of medicine and supernatant liquor in the inside of coagulation sedimentation groove.
Now describe the effect of coagulation sedimentation groove (90) in detail, flowing into the supernatant liquor of coagulation sedimentation groove from ingress pipe (92), at first injecting sulfuric acid and, regulate supernatant liquor to neutral with agitating vane (93) mixing from injection tube (94), be that the pH value is preferably to 7.2～7.8, especially preferably to about 7.5.In being adjusted to the neutral supernatant liquor, inject metal-salt with specified amount, as molysite and mixing from injection tube (94).By chemical reaction molysite and supernatant liquor between, remove residual phosphorus and suspension solid substance supernatant liquor in thereafter.
The reaction formula of removing residual phosphorus is as follows:
That is, residual phosphorus and molysite direct reaction in the supernatant liquor are removed with insoluble salt.
In addition, the iron in the molysite, the hydroxide radical reaction by following reaction formula and supernatant liquor forms ferric hydroxide precipitate, and is removed.
At this moment because the viscosity of sedimentary ironic hydroxide, in the supernatant liquor residual suspension solid substance together coagulation sedimentation be removed.
Arrow shown in Fig. 7 right half part is represented mixed solution process of flowing in coagulation sedimentation groove (90) of supernatant liquor and pharmaceutical chemicals.In the inside of 1 partition wall (96), during owing to agitating vane (93) running, in the space that is limited by partition wall, supernatant liquor and pharmaceutical chemicals short mix were carried out 5 minutes approximately.Then, when the mixed solution that obtains was crossed the terminal portions of 1 partition wall, its mixing energy reduced.Between 1 partition wall and 2 partition walls (97), carry out the aggegation and the mud particle growth of medicine mud.When mixed solution was crossed 2 partition walls (97), the residual mixing energy of mixed solution was eliminated, its as a result the mud of mixed solution cross terminal partition wall (98) precipitation.The baffle plate (99) on the top of the final treating water that produces in the coagulation sedimentation groove by being arranged on the coagulation sedimentation groove is discharged into the outside, mud is discharged from the outlet (91) that is arranged on coagulation sedimentation groove bottom, is transferred to water extracter (100) along the circuit shown in the arrow h of Fig. 1.
Along Fig. 1 arrow f, the g circuit shown in respectively, together flow in the water extracter (100) from the discharge mud of anaerobic fermentation groove (30) with from the mud of multiple settling bath (80).The mud that flows into water extracter (100) utilizes processed to be separated into dehydration mud and dehydration filtrate.Dehydration mud organic content height owing to contain the toxicity material hardly, can re-use with fertilizer by solid dungization.Transport circuit e inflow tempering tank (50) by the filtrate that dehydration produces via Fig. 1.
Embodiment
Below with embodiment the present invention is described.The present invention is not limited by this embodiment.
Use the wastewater treatment equipment of Fig. 1, purifying treatment is at scraper plate (the animal industry waste water that produces in the formula pig house of ス Network レ-パ).Biology oxygen-consumption (BOD), chemical oxygen demand (COD), total nitrogen (TN) and the total phosphorus content (TP) of the animal industry waste water of confession purifying treatment are as shown in table 1.
Table 1
| Project | Numerical value (mg/L) |
| BOD COD TN TP | 13000 21300 2670 550 |
Table 2 has been put down in writing the specification of used wastewater treatment equipment in this test example.
Table 2
| The groove, the apparatus that use | Specification | Remarks |
| The multiple tilting stillpot of activation of microorganism groove anaerobic fermenter electric coil mixing channel aeration tank denitrifying tank coagulation sedimentation groove pH meter passes on pump and transports pump and mix with motor air blast molysite sulfuric acid | Volume 2.02L (internal diameter 12cm, high 18cm) volume 4.17L (internal diameter 15cm, high 25cm) 200W, hot line volume 0.9L (L: H=2: 1) volume 14.5L, compartment L: B=1: 2 volume 2.1L (internal diameter 10cm, high 28cm) volume 4.7L L * B * H=26 * 13 * 14cm volume 21L (internal diameter 12cm, high 6cm) DM100 マ ス -Off レ Star Network ス pump ギ Le ス Application (ミ ニ プ ラ ス 3) pump M6CA30M 20L/min (1.2 air pressure) FeCl 3 HaSO 41.0 mole | Round shape, drop into 3g bacterium soil round shape, inoculating 50% digestion mud keeps 30 ℃ of tapers bottoms of temperature to be separated into 4 compartment MLSS 10000mg/L round shapes for the sphere of 7 ° of inclinations, filling filter material sphere, 120 ° of 4 pH of inclination precipitation plate, 24 60rpm Fe of ORP dual-purpose 3+/L 200～300mg H +/L 70mg |
Wherein, pH meter is for the pH value of measuring the supernatant liquor in the coagulation sedimentation groove (90); The pump that passes on is for passing on waste water in the storagetank (20) to anaerobic fermentation groove (30); Transport pump and be mud in the transporter; To mix with motor be to be mixing agitating vane (32,73) in running anaerobic fermentation groove (30) and the denitrifying tank (70), and the mixing of coagulation sedimentation groove (90) agitating vane (93); And gas blower is for supplying with microorganism activated bath (40) and aerator tank (60) air.
The bacillus that contains another approach cultivation of bacterium soil weight 1% degree in microorganism activated bath (40) in the bacterium soil (42) that drops into is microorganism and ray fungi microorganism.
Delivery rate from denitrifying tank (70) to tempering tank (50) is 125%, and the mud delivery rate from multiple tilting settling bath (80) to anaerobic fermentation groove (30) is 75%, and the mud delivery rate from aerator tank (60) to microorganism activated bath (40) is 100%.
All deliver to tempering tank (50) from water extracter (100) filtrate of will dewatering.The whole volumes of device except that storagetank (20) are 30.3L, and air is blown with 15～20L/min.
The top section inner at anaerobic fermentation groove (30) formed scum silica frost after about 10 days.Redox potential (ORP) value below-300, considers that the dissolved phosphorus content of liquid effluent increases about 1.5～2.2 times owing to the occasion of transporting dilution effect for about, and solvability COD content does not have big increase., it is about 32.6% that total nitrogen (TN) reduces, because with the pre-treatment of anaerobic fermentation groove (30), follow-up nitrogen load quite reduces, the oxygen amount of nitrated requirement also quite reduces.
The microorganism mixed solution of aerator tank (60) keeps the concentration of about 11000～14000mg/L, and the mud turnout is by removing the about 0.5kg MLVSS of every BOD (kg), and discharging concentration of hydraulic mixture is about 18000mg/L.Dissolved oxygen content in the aerator tank (60) is being positioned at compartment (60a) the maintenance 2.0mg/L that flows into end, keeping 1-1.5mg/L near the compartment (60b) that flows into end, keep 0.5～1mg/L at compartment (60c), and be positioned at the compartment of outlet end (60d) maintenance 2.5mg/L near outlet end.PH value in the aerator tank is 7.7～8.2.The about 2325mg CaCO of basicity
3/ L reduces in nitrated operation, and can reduce by the required amount that forms the agglutinant of oxyhydroxide in the follow-up aggegation treatment process, forms good condition.
The outflow water quality of multiple tilting settling bath (80) is BOD128mg/L, TN145mg/L and TP75mg/L.The height that BOD and TN show more than 95% is removed rate, and the TP rate of removing is 86%.Add molysite in the supernatant liquor of multiple tilting settling bath (80), the outflow water quality of carrying out the coagulation sedimentation groove (90) of coagulation sedimentation shows as BOD42mg/L, suspension solid substance (SS) 33mg/L, the stable water quality of TN45mg/L and TP6.2mg/L.At this moment, aggegation mud produces the suspension solid substance (SS) of about 4 times multiple tilting settling bath (80), as the 13.6g/d that in multiple tilting settling bath, produces, according to coagulation sedimentation mud 4.3g/d, the mud that every COD that animal industry waste water is removed produces is every COD (kg) SS0.4kg that removes.
The result of present embodiment animal industry waste water is as shown in table 3.The SVI of the microorganism mixed solution of aerator tank in the treatment process (60) is 62-115, and the oxygen required amount is 58-105mg O/L/h, and the oxygen amount of effective supply in oxygen transmission rate 0.1, is about 360mg O/L/h.For this reason, aerator tank (60) though dissolved oxygen concentration keep lower, for being full of the value of required amount.Thereby because the present invention has controlled dissolved oxygen concentration, processing costs reaches the effect of suitable saving.
Table 3
| TCOD /SCOD | TBOD /SBOD | TSS /VSS | TKN /NH 3 | NO 2-N /NO 3-N | TP /SP | Basicity | ||
| 21300 /9700 | 13000 /4700 | 7200 /5760 | 2670 /840 | - | 550 /90 | 3500 | ||
| Flow out water | The multiple tilting stillpot of anaerobic fermenter mixing channel coagulation sedimentation groove | 17945 /3850 16050 /2120 1176 /716 475 /325 | 10100 /3130 8520 /1656 127.6 /26 42 /21 | 14500 /9950 14200 /10215 506 /395 33 /19 | 1537 /371 1321 /143 115 /26 18.3 /9.2 | - 2.1 /0.8 27 /3 26 /1.9 | 496 /157 360 /145 75 /57 6.2 /0.9 | 4093 2950 625 300 |
The above results shows, when handling high density animal industry waste water according to the present invention, but economical and efficient remove organism and nitrogen and phosphorus, can guarantee to stablize good water quality treatment economically.The present invention can eliminate the problem of environmental pollution relevant with animal industry waste water efficiently applicable to small-scale waste water generation facility.In addition, different by the mud that the animal industry wastewater treatment produces with the following water in general city, do not contain the danger of heavy metal or other noxious pollutant.Because of than with this mud composting, also can be used as solid fertilizer and effectively utilize.
Fig. 1 is the pie graph of wastewater treatment operation of the present invention.
Fig. 2 is the sketch of the anaerobic fermentation groove that uses in the wastewater treatment equipment of the present invention.
Fig. 3 is the sketch of the microorganism activated bath that uses in the wastewater treatment equipment of the present invention.
Fig. 4 is the sketch of the aerator tank that uses in the wastewater treatment equipment of the present invention.
Fig. 5 is the denitrifying tank sketch that uses in the denitrogenation processing of the present invention.
Fig. 6 is the sketch of the multiple tilting settling bath that uses in the wastewater treatment equipment of the present invention.
Fig. 7 is the internal structural map of the coagulation sedimentation groove that uses in the wastewater treatment equipment of the present invention.
Claims (11)
1, a kind of method of wastewater treatment is characterized in that comprising following operation:
(a) will from waste water, be kept in the storagetank and make concentration and the operation of flow homogenizing by the liquid effluent of solid-liquid separation;
(b) in the anaerobic fermentation groove, utilize anerobe with storagetank in difficult decomposing organic matter in the liquid effluent of homogenizing be hydrolyzed into easily by the state of follow-up microorganism panning, and make dephosphorization microorganism activatory operation;
(c) the aerobic microorganism that will be transported to from the aerator tank of dissolved oxygen adjustable type in the mud of microorganism activated bath is selected activation and increases biological adsorptive power this microorganism activated bath, by making the microorganism growth of filling in the soil microorganisms carrier, make aerobic microorganism activatory operation;
(d) will accept the effluent liquid of the effluent liquid of the microorganism activated bath of soil microorganisms, above-mentioned anaerobic fermentation groove and from the mud of denitrifying tank in tempering tank blended operation;
(e) above-mentioned mixed solution is imported above-mentioned aerator tank, handle organism and phosphorus, and the operation that ammonium-nitrogen is nitrated;
(f) under anaerobic state, utilize interior the giving birth to of microorganism to breathe the operation of the liquid of handling in the above-mentioned aerator tank being carried out the itrated compound denitrogenation;
(g) in the primary sedimentation groove, the liquid separation of denitrogenation processing is become the operation of mud and supernatant liquor;
(h) in the coagulation sedimentation groove, from the primary sedimentation groove, remove the solid substance of residual phosphorus and suspension in the supernatant liquor of precipitate and separate, and emit the operation for the treatment of water.
2, the method for wastewater treatment of claim 1 record also comprises the operation of the part of isolating microorganism mud in the primary sedimentation groove being supplied with the microorganism activated bath.
3, the method for wastewater treatment of claim 1 record, the treatment process of above-mentioned aerator tank is finished in the multi-stage type aerator tank, and the dissolved oxygen concentration of aerator tank intermediate compartment is adjusted to 0.5-1mg/L.
4, the method for wastewater treatment of claim 1 record, in the above-mentioned coagulation sedimentation groove treatment process, the pH value in the coagulation sedimentation groove is adjusted to 7.2-7.8 after, the injection molysite.
5, the method for wastewater treatment of claim 4 record, also comprise isolating mud water extracter solid-liquid separation in the discharge mud of the precipitation mud of above-mentioned coagulation sedimentation groove, anaerobic fermentation groove and the primary sedimentation groove, and the filtrate of will dewatering is transported to the operation of tempering tank.
6, the method for wastewater treatment of claim 1 record is characterized in that for getting rid of the resistance phenomenon of the dephosphorization microorganism that is caused by itrated compound, with denitrifying tank and anaerobic fermentation groove lock out operation.
7, a kind of wastewater treatment equipment is characterized in that comprising:
(A) will be from waste water solid-liquid separation the liquid effluent storage and with the storagetank of concentration and flow homogenizing;
(B) be positioned at the downstream side of above-mentioned storagetank and have the anaerobic fermentation groove of anerobe;
(C) have the inside activated bath of accommodating the soil microorganisms carrier and the microorganism activated bath of diffuser;
(D) have flow into separately effluent liquid of mentioned microorganism activated bath and above-mentioned anaerobic fermentation groove, from the influx of the mud of denitrifying tank, and accept inflow and blended tempering tank from above-mentioned influx;
(E) aerator tank in the above-mentioned tempering tank of connection downstream side;
(F) denitrifying tank in the above-mentioned aerator tank of connection downstream side;
(G) the primary sedimentation groove in the above-mentioned denitrifying tank of connection downstream side; With
(H) the coagulation sedimentation groove in the above-mentioned primary sedimentation groove of connection downstream side.
8, the wastewater treatment equipment of claim 7 record, the mentioned microorganism activated bath comprises the inside activated bath that is filled with the soil microorganisms carrier.
9, the wastewater treatment equipment of claim 7 record, above-mentioned aerator tank is the multi-stage type aerator tank.
10, the wastewater treatment equipment of claim 7 record, also comprise acceptance respectively from the mud feed of above-mentioned primary sedimentation groove, coagulation sedimentation groove and anaerobic fermentation groove, carry out the water extracter of solid-liquid separation.
11, according to the wastewater treatment equipment of claim 10 record, wherein, above-mentioned water extracter by solid-liquid separation dehydration filtrate be admitted to the influx of above-mentioned tempering tank.
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| CN 00117854 CN1230389C (en) | 2000-02-15 | 2000-02-15 | Method and device for treating high concentration waste water |
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| CN 00117854 CN1230389C (en) | 2000-02-15 | 2000-02-15 | Method and device for treating high concentration waste water |
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| KR100463590B1 (en) * | 2003-03-14 | 2004-12-29 | 한상배 | Advanced Waste Water Treatment Methods with increasing Easily Biodegradable Oroganic Concentration for Nitrogen and phosphorous Removal |
| KR100438022B1 (en) * | 2003-04-08 | 2004-06-30 | (주)자연과환경 | Method for waste water treatment using float media |
| CN1325400C (en) * | 2003-09-30 | 2007-07-11 | 深圳市宇力科技有限公司 | House refuse percolate treating method |
| CN100349809C (en) * | 2005-02-22 | 2007-11-21 | 北京师范大学 | Yeast low oxygen SBR process and device aimed to high concentrated organic wastewater |
| CN104150992B (en) * | 2014-07-11 | 2016-08-24 | 徐州承启生物科技有限公司 | Rotten plant microorganism is utilized to realize the method and device of organic wastewater liquid compost |
| US11440853B2 (en) | 2017-02-28 | 2022-09-13 | Drylet, Inc. | Systems, methods, and apparatus for increased wastewater effluent and biosolids quality |
| CN109467186B (en) * | 2018-11-30 | 2021-10-29 | 华南理工大学 | Partial pre-nitrosation-anaerobic ammonia oxidation efficient denitrification method for ammonia nitrogen wastewater |
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