CN203333441U - Resource utilization and treatment device of livestock and poultry breeding waste water - Google Patents

Resource utilization and treatment device of livestock and poultry breeding waste water Download PDF

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Publication number
CN203333441U
CN203333441U CN2013203718700U CN201320371870U CN203333441U CN 203333441 U CN203333441 U CN 203333441U CN 2013203718700 U CN2013203718700 U CN 2013203718700U CN 201320371870 U CN201320371870 U CN 201320371870U CN 203333441 U CN203333441 U CN 203333441U
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treatment
tank
waste water
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张世文
徐琛
林锦松
陈艺羡
李丹
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BOYING (XIAMEN) TECHNOLOGY Co Ltd
Boying Xiamen Science and Technology Co Ltd
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BOYING (XIAMEN) TECHNOLOGY Co Ltd
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Abstract

The utility model relates to a resource utilization and treatment device of livestock and poultry breeding waste water. The resource utilization and treatment device comprises an anaerobic tank, a grille tank, a regulating tank, a biological aerated filter (BAF), a disinfection tank, a sludge tank, a sludge dehydration device and a gas collection device. The resource utilization and treatment device disclosed by the utility model is based on the combination of an anaerobic digestion biogas production technology, a BAF technology and a disinfection technology, the livestock and poultry breeding waste water is taken as resources, biogas is produced by anaerobic fermentation treatment, solid-liquid separation is further performed on the waste water after the production of the biogas, solid slag is used as a raw material for producing organic fertilizers, the organic fertilizers are produced, and the waste water can be recycled and achieve the emission standard after being subjected to the BAF technology and disinfection; the resource utilization and treatment device has the advantages of good treatment effects, low energy consumption, comprehensive utilization of the resources and economic benefits.

Description

A kind of utilization of resources of livestock breeding wastewater and treatment unit
Technical field
The utility model relates to a kind of utilization of resources and treatment unit of livestock breeding wastewater, particularly relate to a kind of based on anaerobic technology, livestock breeding wastewater comprehensive utilization of resources and the wastewater treatment equipment of BAF technology and disinfection technology, especially take livestock breeding wastewater as 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 subject 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 dissolved oxygen in water body significantly descends, large amount of organic matter can under anaerobic continue to decompose, and in decomposition, will produce the toxic gases such as methane, hydrogen sulfide, 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 produce many problems in the process of comprehensive utilization, as the waste water generation is large, still very high, the used dilution water yield is many and irrigated by season to affect etc. for complicated component, processing after stain substrate concentration.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 be processed, 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, can make the pollutant load amount of liquid portion greatly reduce; Secondly, by solid-liquid separation, can prevent that larger solids from entering the subsequent disposal link, prevent the obstruction damage of equipment etc.In addition, carry out solid-liquid separation and also can increase the anaerobic digestion maintainability before Anaerobic Digestion, 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
Because aquaculture waste water belongs to " three height " waste water of high organic concentration, high N, P content and high harmful microorganism quantity.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 effectively to remove a large amount of dissolved organic matters under lower running cost, 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, having reached more than 2000 to the big-and-middle-sized biogas engineering quantity of 2002 China's livestock and poultry farm in the end of the year and located, is to have in the world one of country that firedamp gas equipment quantity is maximum.Although, also being no lack of the example of failure in the biogas engineering construction of China, 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, and therefore building biogas engineering will be the optimal selection that middle-size and small-size plant fecal sewage is administered simultaneously.
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; Carry out flocculation sediment in the reaction preliminary sedimentation tank; 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; After pending waste water carries out biological degradation in membrane bioreactor, after being filtered by ultra-filtration membrane, discharge again; 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, be connected with pipeline between anaerobism EGSB reactor and intermediate sedimentation pond, 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 breeding wastewater treatment unit of economic benefit etc. simultaneously.
A kind of utilization of resources of livestock breeding wastewater and treatment unit are provided with anaerobic pond, grating tank, equalizing tank, BAF (BAF), sterilization pool, sludge sump, sludge dehydration device, 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 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, and the 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 equalizing tank and BAF (being mud) outlet all connects with the sludge sump import, and the sludge sump outlet connects with the sludge dehydration device import.
The filtrate of described BAF is a kind of in zeolite filler, ceramic grain filter and volcanics filtrate etc.
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 in described electrolyzer is a kind of in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy and nano-catalytic noble electrode.
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 → 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, there is following outstanding advantages:
(1) by anaerobic digestion, produce biogas, the change refuse is resource, produces bioenergy, reduces cost for wastewater treatment;
(2) ight soil by anaerobic digestion after, obtain again dewatered sludge after solid-liquid separation, 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, then add composite fertilizer and obtain compoiste fertilizer, the utilization of resources is deep;
(3), after the biochemical treatment of aeration biochemical filter tank, the oxygenolysis by aerobic microbiological thoroughly decomposes pollutant in water;
(4) 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.
The accompanying drawing explanation
The structure of the utilization of resources that Fig. 1 is a kind of livestock breeding wastewater described in the utility model and treatment unit embodiment forms schematic diagram.
Embodiment
The utility model is goed deep into the design of the refining plant to livestock breeding wastewater that completes after the comparative study of system in composition, character and existing processing scheme to existing livestock breeding wastewater, it uses by the combination of the methods such as anaerobic digestion methane production, biological treatment, sterilization, thereby forms a kind of utilization of resources and wastewater treatment equipment that is particularly suitable for livestock breeding wastewater.
Embodiment of the present utility model is described with reference to the accompanying drawings.
With reference to Fig. 1, a kind of utilization of resources of livestock breeding wastewater and treatment unit comprise: anaerobic pond 1, grating tank 2, equalizing tank 3, BAF 4, sterilization pool 5, water collecting basin 6, sludge gas collecting device 7, sludge sump 8, sludge filter press 9, lift pump 10, lift pump 11, lift pump 12.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 10, the pneumatic outlet of anaerobic pond 1 connects with the import of gas collector 7, 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 BAF 4 through lift pump 11, the water outlet of BAF 4 connects with the water-in of sterilization pool 5 through lift pump 12, sterilization pool 5 water outlets connect with the water-in of water collecting basin 6, reuse water 60 ~ 80% in water collecting basin 6 is for plant's cycling use of water, 20 ~ 40% qualified discharges, and the slag in grating tank 2, equalizing tank 3, throw out in BAF 4 (being mud) outlet all connects with sludge sump 8 imports, sludge sump 8 outlets connect with sludge filter press 9 imports.
Provide a kind of utilization of resources of livestock breeding wastewater and the specific embodiment of wastewater treatment use device below in conjunction with Fig. 1.
Embodiment 1
The utilization of resources of 500 ton per day livestock breeding wastewaters and method of wastewater treatment.
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 collecting by pipeline, 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 in process anaerobic pond 1, improve the B/C value of waste water by anaerobic treatment, improve the biodegradability of waste water; The methane and carbon dioxide produced is collected storage by gas collector 7;
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/L 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, to prevent follow-up treatment facility, stops up.Waste water after grating tank 2 is processed, flow into equalizing tank 3, carries out water quality, water yield adjusting in equalizing tank 3, and precipitation is separated.
(3) BAF biochemical (BAF biochemistry)
Waste water after ammonia nitrogen removal is processed enters BAF 4, 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 3 BAF biochemistry
Sequence number Project Unit Measured value Sequence number Project Unit Measured value
1 COD Cr mg/L 45 4 Ammonia nitrogen mg/L 11
2 SS mg/L 5 5 Total phosphorus mg/L 0.1
3 BOD 5 mg/L 2 ? ? ? ?
(4) sterilization
Waste water is after BAF 4 biochemical treatments, and water outlet is disinfected through electrolysis machine 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.
(5) sludge treatment
The mud that grating tank 2, equalizing tank 3 and 4 biochemical treatments of aeration biochemical filter tank produce all enters sludge sump 8 by pipeline, and then the dehydration through sludge filter press 9 obtains dewatered sludge, can be used as fertilizer.
The effluent quality index is as shown in table 4 after measured.
The water-quality guideline of table 4 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 unplessantness displeasure 9 SS mg/L 2
4 COD Cr mg/L 40 10 Ammonia nitrogen mg/L 9
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 4, effluent quality meets GB/T18920-2002 " urban sewage reutilization-city miscellaneous water water quality standard ".
Embodiment 2
The utilization of resources of 1200 ton per day livestock breeding wastewaters and method of wastewater treatment.
Described livestock breeding wastewater water-quality guideline is as shown in table 5 after measured.
The water-quality guideline of table 5 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/L 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 collecting by pipeline, 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 in process anaerobic pond 1, improve the B/C value of waste water by anaerobic treatment, improve the biodegradability of waste water; The methane and carbon dioxide produced is collected storage by gas collector 7;
The water-quality guideline of livestock breeding wastewater (supernatant liquor) after table 6 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/L 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, to prevent follow-up treatment facility, stops up.Waste water after grating tank 2 is processed, flow into equalizing tank, carries out water quality, water yield adjusting in equalizing tank 3, and precipitation is separated.
(3) BAF biochemical (BAF biochemistry)
Waste water after ammonia nitrogen removal is processed enters BAF 4, 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 7 BAF biochemistry
Sequence number Project Unit Measured value Sequence number Project Unit Measured value
1 COD Cr mg/L 41 4 Ammonia nitrogen mg/L 5
2 SS mg/L 3 5 Total phosphorus mg/L 0.05
3 BOD 5 mg/L 1 ? ? ? ?
(4) sterilization
Waste water is after BAF 4 biochemical treatments, and water outlet is disinfected through electrolysis machine 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.
(5) sludge treatment
The mud that grating tank 2, equalizing tank 3 and 4 biochemical treatments of aeration biochemical filter tank produce all enters sludge sump 8 by pipeline, and then the dehydration through sludge filter press 9 obtains dewatered sludge, can be used as fertilizer.
The effluent quality index is as shown in table 8 after measured.
The water-quality guideline of table 8 water outlet
Sequence number Project Unit Measured value Sequence number Project Unit Measured value
1 pH 7.0 7 Total dissolved solid mg/L 690
2 Colourity Doubly 8 8 Total phosphorus mg/L 0.05
3 Smell Without unplessantness displeasure 9 SS mg/L 1
4 COD Cr mg/L 35 10 Ammonia nitrogen mg/L 9
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 8, effluent quality meets GB/T18920-2002 " urban sewage reutilization-city miscellaneous water water quality standard ".
Embodiment 3
The utilization of resources of 2000 ton per day livestock breeding wastewaters and method of wastewater treatment.
Described livestock breeding wastewater water-quality guideline is as shown in table 9 after measured.
The water-quality guideline of table 9 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 collecting by pipeline, 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 in process anaerobic pond 1, improve the B/C value of waste water by anaerobic treatment, improve the biodegradability of waste water; The methane and carbon dioxide produced is collected by gas collector 7;
The water-quality guideline of livestock breeding wastewater (supernatant liquor) after table 10 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/L 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, to prevent follow-up treatment facility, stops up.Waste water after grating tank 2 is processed, flow into equalizing tank 3, carries out water quality, water yield adjusting in equalizing tank 3, and precipitation is separated.
(3) BAF biochemical (BAF biochemistry)
Waste water after equalizing tank 3 enters BAF 4, 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 11 BAF biochemistry
Sequence number Project Unit Measured value Sequence number Project Unit Measured value
1 COD Cr mg/L 35 4 Ammonia nitrogen mg/L 11
2 SS mg/L 2 5 Total phosphorus mg/L 0.1
3 BOD 5 mg/L 4 ? ? ? ?
(4) sterilization
Waste water is after BAF 4 biochemical treatments, and water outlet is disinfected through electrolysis machine 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.
(5) sludge treatment
The mud that grating tank 2, equalizing tank 3 and 4 biochemical treatments of aeration biochemical filter tank produce all enters sludge sump 8 by pipeline, and then the dehydration through sludge filter press 9 obtains dewatered sludge, can be used as fertilizer.
The effluent quality index is as shown in table 12 after measured.
The water-quality guideline of table 12 water outlet
Sequence number Project Unit Measured value Sequence number Project Unit Measured value
1 pH 7.0 7 Total dissolved solid mg/L 720
2 Colourity Doubly 8 8 Total phosphorus mg/L 0.1
3 Smell Without unplessantness displeasure 9 SS mg/L 1
4 COD Cr mg/L 30 10 Ammonia nitrogen mg/L 10
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 12, effluent quality meets GB/T18920-2002 " urban sewage reutilization-city miscellaneous water water quality standard ".

Claims (5)

1. the utilization of resources of a livestock breeding wastewater and treatment unit, is characterized in that: comprise anaerobic pond, grating tank, equalizing tank, BAF, sterilization pool, sludge sump, sludge dehydration device, 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 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, and the 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, and the throw out outlet in equalizing tank and aeration biochemical filter tank all connects with the sludge sump import, and the sludge sump outlet connects with the sludge dehydration device import.
2. the utilization of resources of a kind of livestock breeding wastewater as claimed in claim 1 and treatment unit is characterized in that: the filtrate of described BAF is a kind of in zeolite filler, ceramic grain filter and volcanics filtrate.
3. the utilization of resources of a kind of livestock breeding wastewater as claimed in claim 1 and treatment unit is characterized in that: described sterilization is a kind of in electrosterilization, ozonization, chlorine disinfectant or disinfection by ultraviolet light.
4. the utilization of resources of a kind of livestock breeding wastewater as claimed in claim 3 and treatment unit, it is characterized in that: the electrolysis machine of described electrosterilization is provided with power supply and electrolyzer, and the 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.
5. the utilization of resources of a kind of livestock breeding wastewater as claimed in claim 4 and treatment unit, 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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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103288302A (en) * 2013-06-27 2013-09-11 波鹰(厦门)科技有限公司 Livestock/poultry breeding wastewater resource utilization and treatment device
CN104724892A (en) * 2015-03-30 2015-06-24 湖州华鼎贸易有限公司 Treatment method of acidic dye industrial wastewater
CN110104882A (en) * 2019-05-10 2019-08-09 武汉碧清环保技术有限责任公司 A kind of sewage treatment system for farm

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103288302A (en) * 2013-06-27 2013-09-11 波鹰(厦门)科技有限公司 Livestock/poultry breeding wastewater resource utilization and treatment device
CN104724892A (en) * 2015-03-30 2015-06-24 湖州华鼎贸易有限公司 Treatment method of acidic dye industrial wastewater
CN110104882A (en) * 2019-05-10 2019-08-09 武汉碧清环保技术有限责任公司 A kind of sewage treatment system for farm

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