CN203307182U - Resource utilization and regenerative recycling device of livestock and poultry breeding wastewater - Google Patents
Resource utilization and regenerative recycling device of livestock and poultry breeding wastewater Download PDFInfo
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- CN203307182U CN203307182U CN2013203718734U CN201320371873U CN203307182U CN 203307182 U CN203307182 U CN 203307182U CN 2013203718734 U CN2013203718734 U CN 2013203718734U CN 201320371873 U CN201320371873 U CN 201320371873U CN 203307182 U CN203307182 U CN 203307182U
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Images
Classifications
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The utility model discloses a resource utilization and regenerative recycling device of livestock and poultry breeding wastewater. The device comprises an anaerobic tank, a grating tank, a regulating tank, an ammonia nitrogen removing device, a biological aerated filter (BAF), a disinfecting tank, a sludge tank, a sludge filter press and a gas collecting device, wherein the ammonia nitrogen removing device can adopt a struvite precipitation method or a blow-off method to remove ammonia nitrogen. Based on the combination of anaerobic technology, denitrification technology, BAF technology and disinfection technology, the livestock and poultry breeding wastewater is taken as resources to be subjected to anaerobic fermentation to produce methane, then the solid-liquid separation is performed on the wastewater for producing methane, solid slag is taken as a raw material for producing organic fertilizer, and wastewater is recycled and then discharged when reaching the standard through the BAF technology and disinfection. The treatment effect is good, the energy consumption is low, and the economic benefit is achieved while the resources are comprehensively utilized.
Description
Technical field
The utility model relates to a kind of utilization of resources and recycling utilization device of livestock breeding wastewater, particularly relate to a kind of based on anaerobic technology, denitride technology, the livestock breeding wastewater comprehensive utilization of resources of BAF technology and disinfection technology and waste water reclamation recycling device, the livestock breeding wastewater of particularly take is resource, it is processed by anaerobically fermenting, produce biogas, waste water after production biogas is again through solid-liquid separation, solid slag is for the raw material as producing organic fertilizer, produce organic fertilizer, waste water is recycle and qualified discharge after BAF technology and sterilization again, the water pollution control field that belongs to environmental engineering.
Background technology
Livestock and poultry farm waste water mainly comprises urine, ight soil and breeding house wash-down water, such concentration of organic wastewater is high, its COD is that 5000 ~ 13000mg/L, BOD are that 5000 ~ 6000 mg/L(water rush ight soil, lower same), suspended substance is many, SS is 17000 ~ 20000 mg/L, ammonia-nitrogen content is high, ammonia nitrogen is 600 ~ 1000 mg/L, and stink is large.Aquaculture waste water belongs to the high concentrated organic wastewater that is rich in a large amount of pathogenic agent, and direct discharge enters water body or storage place is improper, is subjected to rain-out to enter water body, may cause the severe exacerbation of surface water or quality of groundwater.Because the leaching of livestock and poultry fecaluria is very strong, the leaching amounts such as the nitrogen in fecaluria, phosphorus and water soluble organic substance are very large, if do not dealt carefully with, will enter the Water table polluted underground water by rainwash and diafiltration.On the impact of surface water main manifestations be that after large amount of organic matter enters water body, organic decomposition will consume the dissolved oxygen in water in a large number, make water body smelly; After the dissolved oxygen in water body significantly descended, large amount of organic matter can under anaerobic continue to decompose, and will produce the toxic gases such as methane, hydrogen sulfide in decomposition, causes the hydrobiont mortality; A large amount of suspended substances in waste water can make the water body muddiness, reduce the photosynthesis of algae in water, limit hydrobiological normal activity, make the hydrobiont of Organic pollutants sensitivity dead gradually, thereby further aggravate the water bottom anoxic, the water body assimilative capacity is reduced; Nitrogen, phosphorus can make body eutrophication, the result of eutrophication can make in water body nitrate and nitrite concentration too high, if it is poisoning that people and animals' long-term drinking can cause, and the growth of some poisonous algae and amount reproduction can discharge a large amount of toxin in water body, cause the mortality of hydrocoles, thereby seriously destroyed the water ecology balance; Some germs in fecaluria, virus etc. may cause some epiphytotics propagation etc. with water flow.
Both at home and abroad the treatment process of mass-producing livestock and poultry farm liquid dung mainly contained comprehensive utilization and process the large class of qualified discharge two.Comprehensive utilization is the good approach that the ecological agriculture and assurance agricultural sustainable development were utilized, built to biomass energy at many levels.But, at present because China's livestock and poultry farm feeding and management method falls behind, add the not in place of the front anaerobic treatment of comprehensive utilization, often make livestock and poultry liquid dung in the process of comprehensive utilization, produce many problems, as large as the waste water generation, complicated component, processing after stain substrate concentration still very high, the used dilution water yield are many and irrigated by season to affect etc.For processing qualified discharge, although technical process used is roughly the same both at home and abroad, i.e. solid-liquid separation-anaerobic digestion-aerobic treatment.
1, solid-liquid separation
No matter livestock and poultry farm waste water adopts what system or aggregate measures to process, all must at first carry out solid-liquid separation, this is one requisite process procedure, its importance and meaning mainly are: at first, in the waste water that general plant emits, solid suspension content is very high, reach as high as 160000mg/L, corresponding organic content is also very high, by solid-liquid separation, the pollutant load amount of liquid portion is reduced greatly; Secondly, can prevent that by solid-liquid separation larger solids from entering the subsequent disposal link, prevent the obstruction damage of equipment etc.In addition, before Anaerobic Digestion, carry out solid-liquid separation and also can increase the anaerobic digestion maintainability, reduce the size of anaerobic reactor and the required residence time, reduce facility investment and improve the removal efficiency of COD.Solid-liquid separation technique generally comprises: sieving, centrifugal, filter, floating except operations such as, sedimentation, precipitation, flocculations.At present, the solid-liquid separation technique that China is existing ripe and corresponding equipment, its device type mainly contains screen mesh type, horizontal centrifuge, pressure filter and hydrocyclone, rotary conic sieve and centrifuge disc type separating machine etc.
2, anaerobic treatment
" three height " waste water that belongs to high organic concentration, high N, P content and high harmful microorganism quantity due to aquaculture waste water.Therefore anaerobic technology becomes indispensable gordian technique in the dirty processing of livestock and poultry farm excrement.For the organic waste water of this high density of plant, adopt anaerobic digestion process under lower running cost, effectively to remove a large amount of dissolved organic matters, the COD clearance reaches 85%～90%, and can kill disease carrying germ, is conducive to the epidemic prevention of plant.If directly adopt the aquaculture waste water after aerobic process is processed solid-liquid separation, although one-time investment can save 20%, but because the power of its consumption is large, the flow of power water consumption is 10 times more than of anaerobic treatment, therefore long-term working cost will bring heavy economical load to plant.
At present a lot of for the treatment of the anaerobic technique of feces of farm, having of wherein comparatively commonly using is following several: anaerobic filter (AF), up-flow anaerobic sludge blanket (UASB), hybrid anaerobic reactor (UASB+AF), two phase anaerobic digestion method and flow lifting type sludge bed reactor (USR) etc.In recent years, anaerobic digestion is that the biogas fermentation technology has been widely used in plant's refuse processing, to the big-and-middle-sized biogas engineering quantity of 2002 China's livestock and poultry farm in the end of the year, having reached more than 2000 and located, is to have in the world one of country that firedamp gas equipment quantity is maximum.Although, in the biogas engineering construction of China, also being no lack of the example of failure, the engineering construction success ratio is only 85%, the can yet be regarded as the most effective technical scheme of the innoxious and resource utilization problem that solves swine manure wastewater of this technology.The waste water that feces of livestock and poultry and plant produce is valuable resource, and the process Anaerobic Digestion both can realize innoxious, can also reclaim biogas and organic fertilizer simultaneously, and therefore building biogas engineering will be the optimal selection that middle-size and small-size plant fecal sewage is administered.
3, aerobic treatment
Aerobic treatment refers to makes good use of a kind of technique that oxygen animalcule is processed breeding wastewater.The aerobe facture can be divided into natural aerobic treatment and the artificial large class of aerobic treatment two.Natural aerobe facture is the method for utilizing natural water body and the microorganism in soil to purify liquid waste, also claims the natural biology facture, mainly contains two kinds of water body purification and soil sanitations.The former mainly contains oxidation pond (the aerobic pool, facultative lagoon, anaerobic pond) and culture pond etc.; The latter mainly contains soil and processes (slow rate, rapid method filter, overland flow) and artificial swamp etc.Natural biology facture not only capital cost is low, and power consumption is few, and this method is to the clearance of the nutrition such as the organism of bio-refractory, nitrogen phosphorus and bacterium also higher than conventional second-stage treatment, and part can reach the effect of tertiary treatment.In addition, under certain condition, this method coordinates sewage irrigation can realize the sewage recycling utilization.The shortcoming of this method is mainly that the large and treatment effect of floor space is subject to seasonal effect etc.If but plant's small scale and near have the discarded ditch pool and beach when utilizing, should select the method to save investment and processing costs as far as possible.It is to take the artificial-strengthening oxygen supply to improve the method for wastewater treatment of aerobic microbiological vigor that artificial aerobe is processed.The method mainly contains activated sludge process, biological filter, blodisc, biological contact oxidation process, sequencing batch active sludge (SBR), aerobic/anaerobic (A/O) and oxidation ditch process etc.With regard to treatment effect, the treatment effect of contact oxidation method and blodisc is better than activated sludge process, although the treatment effect of biological filter is also fine, is easy to occur the filter tank latch up phenomenon.Oxidation ditch, SBR and A/O technique all belong to improved activated sludge process.The oxidation ditch effluent quality is good, generation mud amount is few, also can carry out denitrogenation processing to sewage, but the BOD loading of its processing is little, floor space is large, working cost is high.SBR method automatic controlling level is high, can carry out advanced treatment to sewage, but that its shortcoming is BOD loading is less, and one-time investment is also large.The A/O body is a kind of active sludge treatment process of removing BOD and denitrogenation dual function that has concurrently, although its investment is bigger than normal, the water after this method is processed is easy to qualified discharge.Therefore large for those cultivation scales, the waste water generation is many and have the plant of stronger economic capability can select the A/O method, and for aerobic treatment processes such as the optionally connected tactile oxidation of medium scale plant and blodiscs.
The step that Chinese patent CN200110060847.5 processes breeding wastewater is: sewage is regulated
The anaerobic acidification hydrolysis
Aerobic treatment
Flocculation sediment
Waste water absorption.
Chinese patent CN200610062628.X, disclose a kind for the treatment of process of livestock breeding wastewater, mainly comprises the following steps: first waste water of livestock poultry to be injected to equalizing tank, carries out aeration agitation; In the reaction preliminary sedimentation tank, carry out flocculation sediment; Before and after more pending waste water being injected two-part, fill out the membrane bioreactor that is placed with active sludge; Rear end at membrane bioreactor is equipped with ultra-filtration membrane; Pending waste water carries out biological degradation in membrane bioreactor after, discharge again after by ultra-filtration membrane, filtering; Forward and backward two sections of membrane bioreactor can also arrange respectively micro-hole aerator and the boring aeration device carries out Air Exposure to waste water.
Chinese patent CN201220350995.0 discloses a kind of livestock breeding wastewater treatment unit, comprise equalizing tank, anaerobism EGSB reactor, intermediate sedimentation pond and multi-functional filter tower, wherein equalizing tank is connected on anaerobism EGSB reactor by pipeline, between anaerobism EGSB reactor and intermediate sedimentation pond, be connected with pipeline, connecting tube between intermediate sedimentation pond and multifunctional bio filter tower, multifunctional bio filter tower moral water outlet is divided into two-way, wherein a road is connected on the water-in of equalizing tank, and another road is connected with the extraneous end that utilizes.
From existing treatment technology and technique, exist following some shortcomings: 1, major part is taked the anaerobism coagulation, has subdued most COD, but is not very high to the clearance of nitrogen, phosphorus.2, nitrogen, phosphor resource can not fully be recycled, and enter the easy body eutrophication of water body.3, build that the required investment of the dirty treatment facility of such excrement is too large, working cost is too high.Therefore, seek that facility investment is few, working cost is low and the aquaculture excrement pollution discharge treatment method of highly-efficient treatment, become and solved the key point that aquaculture is polluted.
The utility model content
The purpose of this utility model is to overcome the problem that prior art exists, provide a kind of and combine based on anaerobic digestion methane production technology, BAF technology, disinfection technology, treatment effect is good, energy consumption is low and accomplish that comprehensive utilization of resources creates the novel livestock breeding wastewater utilization of resources and the waste water reclamation recycling device of economic benefit etc. simultaneously.
A kind of utilization of resources of livestock breeding wastewater and recycling utilization device are provided with anaerobic pond, grating tank, equalizing tank, ammonia nitrogen removal device, BAF (BAF), sterilization pool, sludge sump, dewatering and filtering mud machine, gas collector;
The import of described anaerobic pond connects with the outlet of livestock breeding wastewater, the outlet of anaerobic pond connects with the import of grating tank, the outlet of grating tank connects with the import of equalizing tank, the outlet of equalizing tank connects with the import of ammonia nitrogen removal device, the outlet of ammonia nitrogen removal device connects with BAF (BAF) water-in, the effluent of aeration biological filter mouth connects with the sterilization pool water-in, the sterilization pool water outlet connects with water collecting basin, reuse water 60 ~ 80% in water collecting basin is for plant's cycling use of water, 20 ~ 40% qualified discharges; The anaerobic pond pneumatic outlet connects with the gas collector import; Throw out in slag in grating tank, equalizing tank and BAF (being mud) outlet all connects with the sludge sump import, and the sludge sump outlet connects with the sludge filter press import.
Described ammonia nitrogen removal device can be a kind of in struvite precipitator method ammonia nitrogen removal and blow-off method ammonia nitrogen removal.
The ammonia nitrogen that described struvite precipitator method ammonia nitrogen removal produces generates magnesium ammonium phosphate MgNH4PO46H2O double salt precipitation by magnesium salts, phosphoric acid salt or hydrophosphate reaction, described magnesium salts can be a kind of in magnesium chloride, magnesiumcarbonate, sal epsom, magnesium hydroxide, magnesium oxide, and what described phosphoric acid salt can be in Sodium phosphate dibasic, phosphoric acid is a kind of.
The stripping equipment of described blow-off method ammonia nitrogen removal is a kind of in strengthening formula stripping pond (bubbling pond) and tower stripping device (stripping tower), and stripping tower is divided into again packing tower and tray column.
The ammonia nitrogen that described blow-off method ammonia nitrogen removal produces is absorbed and is generated ammonium salt by mineral acid; Described mineral acid is a kind of of hydrochloric acid, sulfuric acid, phosphoric acid or nitric acid.
The filtrate of described BAF is a kind of in zeolite filler, ceramic grain filter and volcanics filtrate.
Described sterilization is a kind of of electrosterilization, ozonization, chlorine disinfectant or disinfection by ultraviolet light.
Adjacent two interelectrode voltages of the electrolysis machine of described electrosterilization are 2～12V, and current density is 10～320mA/cm
2.
The electrolysis machine of described electrosterilization is provided with power supply and electrolyzer; Electrode materials in described electrolyzer is a kind of in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy and nano-catalytic inert material.
The top layer of described nano-catalytic noble electrode is coated with the metal oxide inertia catalyst coatings that crystal grain is 10～35nm, and the substrate of described nano-catalytic noble electrode is titanium plate or plastic plate.
The technical solution of the utility model is: livestock breeding wastewater → anaerobic digestion methane production → slagging-off → ammonia nitrogen removal → BAF biochemistry → sterilization → qualified discharge.
The utility model had both overcome the defect of alone anaerobism, aerobic treatment high cost, and the utilization of resources that has overcome again conventional breeding wastewater treatment process is not high, and treatment effect is undesirable, and the wastewater flow rate of discharge is large, the defects such as contaminate environment.Compared with the prior art, have following outstanding advantages:
(1) by anaerobic digestion, produce biogas, the change refuse is resource, produces bioenergy, reduces cost for wastewater treatment, utilization of resources degree is high;
(2) by the struvite precipitator method, can realize the recycling of ammonia nitrogen, precipitin reaction is not subjected to the restriction of temperature, water intoxication element, and design and operation are all very simple, can effectively process the ammonia nitrogen waste water of high density.Realize the recycling of struvite, the product struvite contains nitrogen, phosphorus composition, is a kind of good slow-release fertilizer;
(3) ight soil by anaerobic digestion after, after solid-liquid separation, obtain again dewatered sludge, the mud and tangerine bar, the chaff of grain processing, the grouts mixing secondary fermentation of Oil processing that obtain are obtained to organic fertilizer, add again composite fertilizer and step (3) denitrogenation precipitate to obtain compoiste fertilizer, the utilization of resources is deep;
(4) after the biochemical treatment of aeration biochemical filter tank, the oxygenolysis by aerobic microbiological thoroughly decomposes pollutant in water;
(5) the strong oxidizing property free radical produced by the nano-catalytic electrolysis further removes colourity and the stink in waste water, reduces the indexs such as ammonia nitrogen, COD, and kills the microorganisms such as bacterium in waste water, makes the reuse water water conditioning, meets the recycle water quality requirement;
(6) reuse water water conditioning, 60 ~ 80% for plant's cycling use of water, 20 ~ 40% qualified discharges, the cyclic utilization rate of water is high, and discharge is few.
The accompanying drawing explanation
Fig. 1 is that the utilization of resources and the recycling utilization device of a kind of livestock breeding wastewater of the utility model adopts the structure of struvite precipitator method ammonia nitrogen removal to form schematic diagram;
Fig. 2 is the utilization of resources of a kind of livestock breeding wastewater of the utility model and the structure composition schematic diagram that the recycling utilization device adopts the blow-off method ammonia nitrogen removal.
Embodiment
The utility model is in composition, character and existing processing scheme to existing livestock breeding wastewater, to go deep into the design of the refining plant to livestock breeding wastewater completed after the comparative study of system, it uses by the combination of the methods such as anaerobic digestion methane production, ammonia nitrogen removal, biological treatment, sterilization, thereby forms a kind of utilization of resources and waste water reclamation recycling device that is particularly suitable for livestock breeding wastewater.
Accompanying drawing 2 explanation embodiment of the present utility model with reference to the accompanying drawings 1.
Below two groups be the utilization of resources of adopting the present embodiment livestock breeding wastewater and the specific implementation method of recycling utilization device.
First group of embodiment:
With reference to Fig. 1, a kind of utilization of resources of livestock breeding wastewater and recycling utilization device comprise: anaerobic pond 1, grating tank 2, equalizing tank 3, struvite precipitator method ammonia nitrogen removal device 4, BAF 5, sterilization pool 6, water collecting basin 7, sludge gas collecting device 8, sludge sump 9, sludge filter press 10, lift pump 11, lift pump 12, lift pump 13.The import of anaerobic pond 1 connects with the outlet of livestock breeding wastewater, anaerobic pond 1 water outlet connects with the import of grating tank 2 through lift pump 11, the pneumatic outlet of anaerobic pond 1 connects with the import of gas collector 8, the water outlet of grating tank 2 connects with the water-in of equalizing tank 3, the water outlet of equalizing tank 3 connects with the water-in of struvite precipitator method ammonia nitrogen removal device 4 through lift pump 12, the water outlet of struvite precipitator method ammonia nitrogen removal device 4 connects with the water-in of BAF 5, the water outlet of BAF 5 connects with the water-in of sterilization pool 6 through lift pump 13, sterilization pool 6 water outlets connect with water collecting basin 7, 60 ~ 80% for plant's cycling use of water, 20 ~ 40% qualified discharges, and grating tank 2, equalizing tank 3, struvite precipitator method ammonia nitrogen removal device 4, throw out in BAF 5 (being mud) outlet all connects with sludge sump 9 imports, sludge sump 9 outlets connect with 10 imports of dewatering and filtering mud machine.
Embodiment 1
The utilization of resources of 500 ton per day livestock breeding wastewaters and waste water reclamation circulation utilization method.
Described livestock breeding wastewater water-quality guideline is as shown in table 1 after measured.
The water-quality guideline of table 1 livestock breeding wastewater
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 5000 | 5 | Ammonia nitrogen | mg/L | 1000 |
| 2 | SS | mg/L | 20000 | 6 | Excrement colibacillus group | Individual/L | 2.5×10 7 |
| 3 | BOD 5 | mg/L | 2900 | 7 | Roundworm egg | Individual/L | 15000 |
| 4 | Total phosphorus | mg/L | 150 | ? | ? | ? | ? |
(1) anaerobic treatment
Livestock breeding wastewater enters anaerobic pond 1 after by pipeline, collecting, in process anaerobic pond 1, under the absorption of anerobe, the oxygen bacterium of holding concurrently, fermentation, the acting in conjunction of product methane, organic substance decomposing is become to methane and carbon dioxide, by anaerobic treatment, improve the B/C value of waste water, improve the biodegradability of waste water; The methane and carbon dioxide produced is collected storage by gas collector 8;
The water-quality guideline of livestock breeding wastewater (supernatant liquor) after table 2 anaerobic digestion
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 620 | 4 | Ammonia nitrogen | mg/L | 830 |
| 2 | SS | mg/L | 500 | 5 | Total phosphorus | mg/ |
11 |
| 3 | BOD 5 | mg/L | 380 | ? | ? | ? | ? |
(2) slagging-off
Livestock breeding wastewater after anaerobic treatment enters grating tank 2 through row of conduits, and cursory thing thick in waste water is isolated to removal, and collects the ight soil slag, stops up to prevent follow-up treatment facility.Waste water after grating tank 2 is processed, flow into equalizing tank 3, in equalizing tank 3, carries out water quality, water yield adjusting, and precipitation is separated.
(3) ammonia nitrogen removal
Equalizing tank 3 water outlets flow into struvite precipitator method ammonia nitrogen removal device 4 through pipeline, and waste water is after struvite precipitator method ammonia nitrogen removal device 4, and ammonia nitrogen is effectively removed, and clearance reaches 50 ~ 90%.
The step of above-mentioned struvite precipitator method ammonia nitrogen removal is: equalizing tank 3 water outlets flow into struvite precipitator method ammonia nitrogen removal device 4 reaction tanks through pipeline, through chemicals dosing plant under agitation, in certain n(Mg): n(N): n(P)=1:1:1 ratio, first add a certain amount of magnesium chloride and Sodium phosphate dibasic, keep the rotating speed of 50-800 rev/min, sodium hydroxide solution adjust pH to 8.0 with 10%, the ammonia nitrogen in waste water and Mg
2+, PO
4 3-(or HPO
4 2-) reaction generation magnesium ammonium phosphate MgNH
4PO
46H
2The O double salt precipitation, be commonly called as struvite, after reacting completely, carries out precipitate and separate, thereby remove the ammonia nitrogen in breeding wastewater; The throw out of struvite precipitator method ammonia nitrogen removal (being mud) is sent in sludge sump 8 through pump and pipeline, finally in sludge filter press 10, carries out filtering separation, and reclaims struvite, and water outlet enters BAF 5.
The water-quality guideline of livestock breeding wastewater (supernatant liquor) after table 3 ammonia nitrogen removal
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 550 | 4 | Ammonia nitrogen | mg/ |
13 |
| 2 | SS | mg/L | 30 | 5 | Total phosphorus | mg/ |
10 |
| 3 | BOD 5 | mg/L | 460 | ? | ? | ? | ? |
(4) BAF biochemical (BAF biochemistry)
Waste water after ammonia nitrogen removal is processed enters BAF 5, by the oxidation degradation effect, waste water is purified, and further removes COD, SS and ammonia nitrogen, is purified waste water.
(5) sterilization
Waste water is after BAF 5 biochemical treatments, and water outlet is disinfected through the electrolysis machine in sterilization pool 6 again, can further remove colourity, and waste water is carried out to sterilization and disinfection, last qualified discharge.Adjacent two interelectrode voltages of electrolysis machine are 2V, and current density is 200mA/cm
2.
(6) sludge treatment
The mud that slag in grating tank 2, equalizing tank 3 and 5 biochemical treatments of aeration biochemical filter tank produce all enters sludge sump 9 by pipeline, and then the dehydration through sludge filter press 10 obtains dewatered sludge, can be used as fertilizer.
The effluent quality index is as shown in table 2 after measured.
The water-quality guideline of table 5 water outlet
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | pH | — | 6.8 | 7 | Total dissolved solid | mg/L | 930 |
| 2 | Colourity | Doubly | 8 | 8 | Total phosphorus | mg/L | 0.1 |
| 3 | Smell | — | Without |
9 | SS | mg/ |
2 |
| 4 | COD Cr | mg/L | 40 | 10 | Ammonia nitrogen | mg/L | 3 |
| 5 | BOD 5 | mg/L | 1 | 11 | Excrement colibacillus group | Individual/L | 1 |
| 6 | Turbidity | NUT | ≤3 | 12 | Roundworm egg | Individual/L | Do not detect |
As known from Table 5, effluent quality meets GB/T18920-2002 " urban sewage reutilization-city miscellaneous water water quality standard ".
The utilization of resources of 1200 ton per day livestock breeding wastewaters and waste water reclamation circulation utilization method.
Described livestock breeding wastewater water-quality guideline is as shown in table 6 after measured.
The water-quality guideline of table 6 livestock breeding wastewater
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 13000 | 5 | Ammonia nitrogen | mg/L | 1000 |
| 2 | SS | mg/L | 16500 | 6 | Excrement colibacillus group | Individual/ |
2×10 7 |
| 3 | BOD 5 | mg/L | 4500 | 7 | Roundworm egg | Individual/L | 12000 |
| 4 | Total phosphorus | mg/L | 180 | ? | ? | ? | ? |
(1) anaerobic digestion methane production
Livestock breeding wastewater enters anaerobic pond 1 after by pipeline, collecting, in process anaerobic pond 1, under the absorption of anerobe, the oxygen bacterium of holding concurrently, fermentation, the acting in conjunction of product methane, organic substance decomposing is become to methane and carbon dioxide, by anaerobic treatment, improve the B/C value of waste water, improve the biodegradability of waste water; The methane and carbon dioxide produced is collected storage by gas collector 8;
The water-quality guideline of livestock breeding wastewater (supernatant liquor) after table 7 anaerobic digestion
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 710 | 4 | Ammonia nitrogen | mg/L | 950 |
| 2 | SS | mg/L | 450 | 5 | Total phosphorus | mg/ |
13 |
| 3 | BOD 5 | mg/L | 480 | ? | ? | ? | ? |
(2) slagging-off
Livestock breeding wastewater after anaerobic treatment enters grating tank 2 through row of conduits, and cursory thing thick in waste water is isolated to removal, and collects the ight soil slag, stops up to prevent follow-up treatment facility.Waste water after grating tank 2 is processed, flow into equalizing tank, in equalizing tank 3, carries out water quality, water yield adjusting, and precipitation is separated.
(3) ammonia nitrogen removal
Equalizing tank 3 water outlets flow into struvite precipitator method ammonia nitrogen removal device 4 through pipeline, and waste water is after struvite precipitator method ammonia nitrogen removal device 4, and ammonia nitrogen is effectively removed, and clearance reaches 50 ~ 90%.
The step of described struvite precipitator method ammonia nitrogen removal is: equalizing tank 3 water outlets flow into struvite precipitator method ammonia nitrogen removal reaction tank 4 through pipeline, through chemicals dosing plant under agitation, in certain n(Mg): n(N): n(P)=1.4:1:1.2 ratio, first add a certain amount of magnesium chloride and Sodium phosphate dibasic, keep the rotating speed of 50-800 rev/min, sodium hydroxide solution adjust pH to 10.0 with 10%, the ammonia nitrogen in waste water and Mg
2+, PO
4 3-(or HPO
4 2-) reaction generation magnesium ammonium phosphate MgNH
4PO
46H
2The O double salt precipitation, be commonly called as struvite, after reacting completely, carries out precipitate and separate, thereby remove the ammonia nitrogen in breeding wastewater; The throw out of struvite precipitator method ammonia nitrogen removal (being mud) is sent in sludge sump 9 through pump and pipeline, finally in sludge filter press 10, carries out filtering separation, and reclaims struvite, and water outlet enters BAF 5.
The water-quality guideline of livestock breeding wastewater (supernatant liquor) after table 8 ammonia nitrogen removal
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 350 | 4 | Ammonia nitrogen | mg/L | 15 |
| 2 | SS | mg/L | 28 | 5 | Total phosphorus | mg/L | 1 |
| 3 | BOD 5 | mg/L | 300 | ? | ? | ? | ? |
(4) BAF biochemical (BAF biochemistry)
Waste water after ammonia nitrogen removal is processed enters BAF 5, by the oxidation degradation effect, waste water is purified, and further removes COD, SS and ammonia nitrogen, is purified waste water.
The water-quality guideline (supernatant liquor) of livestock breeding wastewater after table 9 BAF biochemistry
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 41 | 4 | Ammonia nitrogen | mg/ |
5 |
| 2 | SS | mg/L | 3 | 5 | Total phosphorus | mg/L | 0.05 |
| 3 | BOD 5 | mg/L | 1 | ? | ? | ? | ? |
(5) sterilization
Waste water is after BAF 5 biochemical treatments, and water outlet is disinfected through the electrolysis machine in sterilization pool 6 again, can further remove colourity, and waste water is carried out to sterilization and disinfection, last qualified discharge.Adjacent two interelectrode voltages of electrolysis machine are 6V, and current density is 320mA/cm
2.
(6) sludge treatment
The mud that slag in grating tank 2, equalizing tank 3 and 5 biochemical treatments of aeration biochemical filter tank produce all enters sludge sump 9 by pipeline, and then the dehydration through sludge filter press 10 obtains dewatered sludge, can be used as fertilizer.
The effluent quality index is as shown in table 10 after measured.
The water-quality guideline of table 10 water outlet
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | pH | — | 7.3 | 7 | Total dissolved solid | mg/L | 690 |
| 2 | Colourity | Doubly | 6 | 8 | Total phosphorus | mg/L | 0.05 |
| 3 | Smell | — | Without |
9 | SS | mg/L | 1 |
| 4 | COD Cr | mg/L | 35 | 10 | Ammonia nitrogen | mg/L | 3 |
| 5 | BOD 5 | mg/L | 1 | 11 | Excrement colibacillus group | Individual/L | 1 |
| 6 | Turbidity | NUT | ≤2 | 12 | Roundworm egg | Individual/L | Do not detect |
As known from Table 10, effluent quality meets GB/T18920-2002 " urban sewage reutilization-city miscellaneous water water quality standard ".
Second group of embodiment:
With reference to Fig. 2, the present embodiment comprises: anaerobic pond 1, grating tank 2, equalizing tank 3, blow-off method ammonia nitrogen removal device 4, BAF 5, sterilization pool 6, water collecting basin 7, sludge gas collecting device 8, sludge sump 9, sludge filter press 10, lift pump 11, lift pump 12, lift pump 13, ammonia absorption device 14.The import of anaerobic pond 1 connects with the outlet of livestock breeding wastewater, anaerobic pond 1 water outlet connects with the import of grating tank 2 through lift pump 11, the pneumatic outlet of anaerobic pond 1 connects with the import of gas collector 8, the water outlet of grating tank 2 connects with the water-in of equalizing tank 3, the water outlet of equalizing tank 3 connects with the water-in of blow-off method ammonia nitrogen removal device 4 through lift pump 12, the water outlet of blow-off method ammonia nitrogen removal device 4 connects with the water-in of BAF 5, the pneumatic outlet of blow-off method ammonia nitrogen removal device 4 connects with ammonia absorption device 14, the water outlet of BAF 5 connects with the water-in of sterilization pool 6 through lift pump 13, sterilization pool 6 water outlets connect with water collecting basin 7, 60 ~ 80% for plant's cycling use of water, 20 ~ 40% qualified discharges, and grating tank 2, equalizing tank 3, throw out in BAF 5 (being mud) outlet all connects with sludge sump 9 imports, sludge sump 9 outlets connect with the import of sludge filter press 10.
Below be the utilization of resources of the livestock breeding wastewater that adopts the present embodiment and the specific implementation method of recycling utilization device.
The utilization of resources of 2000 ton per day livestock breeding wastewaters and waste water reclamation circulation utilization method.
Described livestock breeding wastewater water-quality guideline is as shown in table 11 after measured.
The water-quality guideline of table 11 livestock breeding wastewater
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 7500 | 5 | Ammonia nitrogen | mg/L | 600 |
| 2 | SS | mg/L | 17000 | 6 | Excrement colibacillus group | Individual/L | 3×10 7 |
| 3 | BOD 5 | mg/L | 3900 | 7 | Roundworm egg | Individual/L | 10000 |
| 4 | Total phosphorus | mg/L | 110 | ? | ? | ? | ? |
(1) anaerobic treatment
Livestock breeding wastewater enters anaerobic pond 1 after by pipeline, collecting, in process anaerobic pond 1, under the absorption of anerobe, the oxygen bacterium of holding concurrently, fermentation, the acting in conjunction of product methane, organic substance decomposing is become to methane and carbon dioxide, by anaerobic treatment, improve the B/C value of waste water, improve the biodegradability of waste water; The methane and carbon dioxide produced is collected by gas collector 8;
The water-quality guideline of livestock breeding wastewater (supernatant liquor) after table 12 anaerobic digestion
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 510 | 4 | Ammonia nitrogen | mg/L | 560 |
| 2 | SS | mg/L | 320 | 5 | Total phosphorus | mg/ |
9 |
| 3 | BOD 5 | mg/L | 370 | ? | ? | ? | ? |
(2) slagging-off
Breeding wastewater after anaerobic treatment enters grating tank 2 through row of conduits, and cursory thing thick in waste water is isolated to removal, stops up to prevent follow-up treatment facility.Waste water after grating tank 2 is processed, flow into equalizing tank 3, in equalizing tank 3, carries out water quality, water yield adjusting, and precipitation is separated.
(3) ammonia nitrogen removal
Equalizing tank 3 water outlets flow into blow-off method ammonia nitrogen removal device 4 through pipeline, and waste water is after blow-off method ammonia nitrogen removal device 4, and ammonia nitrogen is effectively removed, and clearance reaches 50 ~ 90%.
Blow-off method is collected with device for collecting ammonia gas 14 except the gas that ammonia produces, and and inorganic acid reaction, generate ammonium salt; Blow-off method is a kind of in strengthening formula stripping pond (bubbling pond) and tower stripping device (stripping tower) etc. except the stripping equipment of ammonia, and stripping tower is divided into again packing tower and tray column.
The water-quality guideline of livestock breeding wastewater (supernatant liquor) after table 13 ammonia nitrogen removal
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 508 | 4 | Ammonia nitrogen | mg/L | 35 |
| 2 | SS | mg/L | 30 | 5 | Total phosphorus | mg/L | 1 |
| 3 | BOD 5 | mg/L | 365 | ? | ? | ? | ? |
(4) BAF biochemical (BAF biochemistry)
Waste water after blow-off method ammonia nitrogen removal device 4 is processed enters BAF 5, by the oxidation degradation effect, waste water is purified, and further removes COD, SS and ammonia nitrogen, is purified waste water.
(5) sterilization
Waste water is after BAF 5 biochemical treatments, and water outlet is disinfected through the electrolysis machine of sterilization pool 6 again, can further remove colourity, and waste water is carried out to sterilization and disinfection, last qualified discharge.Adjacent two interelectrode voltages of electrolysis machine are 12V, and current density is 100mA/cm
2.
(6) sludge treatment
The mud that slag in grating tank 2, equalizing tank 3 and 5 biochemical treatments of aeration biochemical filter tank produce all enters sludge sump 9 by pipeline, and then the dehydration through sludge filter press 10 obtains dewatered sludge, can be used as fertilizer.
The effluent quality index is as shown in Table 15 after measured.
The water-quality guideline of table 15 water outlet
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | pH | — | 6.7 | 7 | Total dissolved solid | mg/L | 720 |
| 2 | Colourity | Doubly | 8 | 8 | Total phosphorus | mg/L | 0.1 |
| 3 | Smell | — | Without |
9 | SS | mg/L | 1 |
| 4 | COD Cr | mg/L | 30 | 10 | Ammonia nitrogen | mg/ |
8 |
| 5 | BOD 5 | mg/L | 1 | 11 | Excrement colibacillus group | Individual/L | 1 |
| 6 | Turbidity | NUT | ≤3 | 12 | Roundworm egg | Individual/L | Do not detect |
As known from Table 15, effluent quality meets GB/T18920-2002 " urban sewage reutilization-city miscellaneous water water quality standard ".
Claims (9)
1. the utilization of resources of a livestock breeding wastewater and recycling utilization device, is characterized in that: comprise anaerobic pond, grating tank, equalizing tank, ammonia nitrogen removal device, BAF (BAF), sterilization pool, sludge sump, sludge filter press, gas collector;
The import of described anaerobic pond connects with the outlet of livestock breeding wastewater, the outlet of anaerobic pond connects with the import of grating tank, the outlet of grating tank connects with the import of equalizing tank, the outlet of equalizing tank connects with the import of ammonia nitrogen removal device, the outlet of ammonia nitrogen removal device connects with BAF (BAF) water-in, the effluent of aeration biological filter mouth connects with the sterilization pool water-in, the sterilization pool water outlet connects with water collecting basin, reuse water 60 ~ 80% in water collecting basin is for plant's cycling use of water, 20 ~ 40% qualified discharges, the anaerobic pond pneumatic outlet connects with the gas collector import, throw out outlet in equalizing tank, ammonia nitrogen removal device and aeration biochemical filter tank all connects with the sludge sump import, and the sludge sump outlet connects with the sludge filter press import.
2. the utilization of resources of a kind of livestock breeding wastewater as claimed in claim 1 and recycling utilization device is characterized in that: described ammonia nitrogen removal device is a kind of in struvite precipitator method ammonia nitrogen removal and blow-off method ammonia nitrogen removal.
3. the utilization of resources of a kind of livestock breeding wastewater as claimed in claim 2 and recycling utilization device is characterized in that: the ammonia nitrogen that described struvite precipitator method ammonia nitrogen removal produces generates magnesium ammonium phosphate MgNH by magnesium salts, phosphoric acid salt or hydrophosphate reaction
4PO
46H
2O double salt precipitation, described magnesium salts are a kind of in magnesium chloride, magnesiumcarbonate, sal epsom, magnesium hydroxide, magnesium oxide, and described phosphoric acid salt is a kind of in Sodium phosphate dibasic, phosphoric acid.
4. the utilization of resources of a kind of livestock breeding wastewater as claimed in claim 2 and recycling utilization device, it is characterized in that: the stripping equipment of described blow-off method ammonia nitrogen removal is a kind of in strengthening formula stripping pond and tower stripping device, and tower stripping device is divided into packing tower and tray column.
5. the utilization of resources of a kind of livestock breeding wastewater as claimed in claim 2 and recycling utilization device, it is characterized in that: the ammonia nitrogen that described blow-off method ammonia nitrogen removal produces is absorbed and is generated ammonium salt by mineral acid, and described mineral acid is a kind of of hydrochloric acid, sulfuric acid, phosphoric acid or nitric acid.
6. the utilization of resources of a kind of livestock breeding wastewater as claimed in claim 1 and recycling utilization device is characterized in that: the filtrate of described BAF is a kind of in zeolite filler, ceramic grain filter and volcanics filtrate.
7. the utilization of resources of a kind of livestock breeding wastewater as claimed in claim 1 and recycling utilization device, it is characterized in that: described sterilization is a kind of of electrosterilization, ozonization, chlorine disinfectant or disinfection by ultraviolet light.
8. the utilization of resources of a kind of livestock breeding wastewater as claimed in claim 7 and recycling utilization device, it is characterized in that: the electrolysis machine of described electrosterilization is provided with power supply and electrolyzer; Electrode in described electrolyzer is a kind of in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy and nano-catalytic noble electrode.
9. the utilization of resources of a kind of livestock breeding wastewater as claimed in claim 8 and recycling utilization device, it is characterized in that: the top layer of described nano-catalytic noble electrode is coated with the metal oxide inertia catalyst coatings that crystal grain is 10～35nm, and the substrate of described nano-catalytic noble electrode is titanium plate or plastic plate.
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| CN2013203718734U CN203307182U (en) | 2013-06-27 | 2013-06-27 | Resource utilization and regenerative recycling device of livestock and poultry breeding wastewater |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105036475A (en) * | 2015-08-05 | 2015-11-11 | 枞阳县宇瑞环保科技有限公司 | Treatment method for livestock breeding sewage |
| CN105483000A (en) * | 2015-12-31 | 2016-04-13 | 北京科技大学 | Multistage fermentation device containing fermentation liquor reflux and denitrification system |
| CN106007179A (en) * | 2016-06-20 | 2016-10-12 | 昆山鸿福泰环保科技有限公司 | Technology achieving air stripping of ammonia nitrogen in waste water and recovering of ammonium sulfate |
| CN106520527B (en) * | 2016-10-20 | 2018-09-04 | 山东科技大学 | A kind of device and method generated using microorganism induction guanite |
| CN109368946A (en) * | 2018-12-18 | 2019-02-22 | 江苏科技大学 | Integrated system and method for ship domestic sewage treatment coupled with nitrogen and phosphorus recovery |
| CN109368945A (en) * | 2018-12-18 | 2019-02-22 | 江苏科技大学 | Integrated system and method for ship domestic sewage treatment and nitrogen and phosphorus recovery based on seawater magnesium source |
| CN116588912A (en) * | 2023-05-18 | 2023-08-15 | 生态环境部南京环境科学研究所 | A method for preparing struvite by using fly ash and aluminum ash in cooperation with nitrogen and phosphorus-containing wastewater treatment |
-
2013
- 2013-06-27 CN CN2013203718734U patent/CN203307182U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105036475A (en) * | 2015-08-05 | 2015-11-11 | 枞阳县宇瑞环保科技有限公司 | Treatment method for livestock breeding sewage |
| CN105483000A (en) * | 2015-12-31 | 2016-04-13 | 北京科技大学 | Multistage fermentation device containing fermentation liquor reflux and denitrification system |
| CN105483000B (en) * | 2015-12-31 | 2018-04-06 | 北京科技大学 | A kind of multistage installation for fermenting for including fermentation liquor backflow denitrification system |
| CN106007179A (en) * | 2016-06-20 | 2016-10-12 | 昆山鸿福泰环保科技有限公司 | Technology achieving air stripping of ammonia nitrogen in waste water and recovering of ammonium sulfate |
| CN106520527B (en) * | 2016-10-20 | 2018-09-04 | 山东科技大学 | A kind of device and method generated using microorganism induction guanite |
| CN109368946A (en) * | 2018-12-18 | 2019-02-22 | 江苏科技大学 | Integrated system and method for ship domestic sewage treatment coupled with nitrogen and phosphorus recovery |
| CN109368945A (en) * | 2018-12-18 | 2019-02-22 | 江苏科技大学 | Integrated system and method for ship domestic sewage treatment and nitrogen and phosphorus recovery based on seawater magnesium source |
| CN116588912A (en) * | 2023-05-18 | 2023-08-15 | 生态环境部南京环境科学研究所 | A method for preparing struvite by using fly ash and aluminum ash in cooperation with nitrogen and phosphorus-containing wastewater treatment |
| CN116588912B (en) * | 2023-05-18 | 2023-11-14 | 生态环境部南京环境科学研究所 | A method for preparing struvite using fly ash, aluminum ash, and nitrogen- and phosphorus-containing wastewater treatment |
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