CN103011493A - Method for removing phosphate and nitrogen from hyperphosphate and high ammonia nitrogen sewage and recovering resources - Google Patents
Method for removing phosphate and nitrogen from hyperphosphate and high ammonia nitrogen sewage and recovering resources Download PDFInfo
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Abstract
The invention discloses a method for removing phosphate and nitrogen from hyperphosphate and high ammonia nitrogen sewage and recovering resources. A polyphosphate accumulating bacteria artificial biological membrane is taken as a core technology to carry out bio-denitrification phosphate and nitrogen removal and is combined with ammonium magnesium phosphate to remove phosphate and ammonia. The method comprises the steps that: A, pig raising sewage biogass slurry is filled into a conditioning tank through a collecting tank and is aerated, mixed and then precipitated to recover the ammonium magnesium phosphate; B, a first-level tank which is fixed with a bacillus and nitrobacteria artificial biological membrane is used; C, a second-level tank which is fixed with a bacillus and photosynthetic bacteria like polyphosphate accumulating bacteria artificial biological membrane is used; D, a third-level tank uses an artificial biological membrane which is prepared from photosynthetic bacteria to treat, wherein the first-level, the second-level and the third-level tanks all adopt artificial biological membrane floating suspension type device and intermittent aeration to create anaerobic/aerobic or anoxic environments and carry out denitrifying phosphate and nitrogen removal; and E, oxidation pond: water reaches the quality standard and is recycled. The method is practicable, has a good treatment effect, is energy-saving, is low in operation cost and is convenient to operate; and a method for treating pig raising sewage with high phosphate and ammonia nitrogen concentrations and other similar organic sewages is provided.
Description
Technical field
The invention belongs to technical field of sewage, more specifically relate to the method that a kind of high phosphorus, high-ammonia-nitrogen sewage dephosphorization denitrogenation, resource reclaim, its be applicable to the to raise pigs phosphorus in sewage and other waste water, removal and resource recycling of ammonia nitrogen.
Background technology
The sewage of raising pigs belongs to high phosphorus, high ammonia nitrogen, high COD, unmanageable sewage:
Pig farm sewage comprises the ight soil, urine of pig, remaining feed etc., so that ammonia nitrogen, phosphorus, COD
CrAll very high with the content of suspended solid.Even the natural pond liquid of after biogas fermentation is processed, discharging, the concentration of ammonia nitrogen wherein still can reach about 600mg/L, and phosphorus content also is higher than 50mg/L, and is very large to environmental influence, belonging to the great high concentrated organic wastewater of intractability, also is to cause one of main source of pollution of body eutrophication.(Ma Yantao Xue Jin phoenix, 2009. raise pigs wastewater processing technology progress." environment and continuative development ", 5:29-32. Meng Xiang sea, Wang Yubo, Zhou Haichuan, the outskirts of a town large scale of pig farm the Study on Sustainable Development under the 2011. recycling economy visual angles-based on the investigation of 29 mass-producing pig farms, Wuhan City and peripheral peasant household." hubei agricultural science ", 50(2): 334-339).
China's sewage disposal present situation of raising pigs:
China is the big country of raising pigs, and the quantity of raising pigs accounts for half of the whole world; Ten thousand pig farm is produced fecaluria per year and is surpassed 20,000 tons, and feces of livestock and poultry amount in 2010 has reached 4,500,000,000 tons according to statistics.Handle the sewage of raising pigs well all significant to the Sustainable development of protection of the environment and pig industry.
It is the supporting ecological agriculture cultivation schemes such as multi stage precipitation-oxidation scheme and fruit-bearing forest, fish pond, arable land that present domestic most large scale of pig farm field fecaluria is processed the method for generally using.Wherein 3 kinds of representative main modes are: solid-liquid separation+methane-generating pit (or anaerobic pond)+aerobic aeration pond+oxidation pond (or fish pond); Methane-generating pit (or anaerobic pond)+facultative lagoon+oxidation pond (or fish pond); Directly enter the fish pond, gush in the river, or is directly used in the fruit tree woods.(Jiang Xin, contaminated wastewater investigation in large scale of pig farm field, 2011. Guangzhou is inquired into Preventing Countermeasures." environmental research and monitoring ", 1:69-72.).
There is other pig farm to introduce the advanced pig breeding instrument of a complete set of import, adopts conventional sewage treatment facility, but water quality severe overweight still; Advanced liquid dung automatic separation equipment is introduced on some pig farms both at home and abroad, recycle after argol direct production granular fertilizer, the sewage purification, but facility investment and operation cost are too high, are difficult to apply.In addition, " methane-generating pit-biofilm reactor-artificial swamp is processed the waste water system of raising pigs " that also has University Of Nanchang (CN101863583A) and " sequencing batch biofilm reactor of piggery wastewater " (CN101863556A), and " the improvement method of digested piggery wastewater " of Chengdu Inst. of Biology, Chinese Academy of Sciences (CN101531436A) etc. is different from patent application of the present invention.The pig farm in district there is no environmental practice more, and the phenomenon that pig manure, urine directly enter surrounding enviroment is very general, and environment is caused sizable harm.
The biological denitrification denitrogenation dephosphorizing:
The biological denitrification denitrogenation dephosphorizing is the research topic that receives much concern, Liu Xin is at " research of external Denitrifying Phosphate Accumulating Organisms dephosphorization influence factor " (Shanxi architecture, 2010,36(18): 178-179), Jiang Ming etc. are at ". biological denitrification dephosphorization technique progress " (" water purification technology ", 2011,30(6): 11-15.), Zhao Linlin, ". Wastewater Denitrifying Phosphorus Removal Technology progress " (" chemical industry environmental protection " that Wang Haiyan etc. deliver, 2011,31(1): 38-41), introduced respectively recent domestic biological denitrification dephosphorization technique progress of research and research level, from rational approach, technique reaches the factor that affects denitrification dephosphorization has been done analysis.
The process of biological denitrification denitrogenation dephosphorizing mainly realizes by Denitrifying Phosphate Accumulating Organisms.The introduction of Gao Yanling, motor comparison system in the chapter 2 " research of polyP bacteria is used " (2006.26-34 page or leaf, Chinese building material industry press) of " biological sewage treatment new technology " book polyP bacteria research and application feature.Existing a large amount of polyP bacteria is separated and confirm, its common trait is under the condition of aerobic or anoxic, the orthophosphoric acid salt of bacterial cell huge uptake solubilised state from sewage, synthetic polyphosphoric acid salt in cell, the phosphorus amount of accumulation can reach the 6-8% of cell weight, and even 31%, and the ordinary cells phosphorus content only is 1-3%, substantially exceeds the phosphorus amount of normal need; On the other hand, under anaerobic, polyphosphoric acid salt in the polyP bacteria decomposer, produce ATP, absorb the lower fatty acids such as acetic acid in the sewage, synthetic poly-β hydroxy fatty acid esters polymer (PHAs) in cell, wherein take poly-β-hydroxy butyrate (PHB) as representative, discharge PO
4 -3In environment; Facultative denitrifying bacterium also has very strong biological phosphate-eliminating effect, they replace oxygen as electron acceptor(EA) with nitric nitrogen, denitrification denitrogenation and two processes of biological phosphate-eliminating are united two into one, and the biochemical metabolism model of polyP bacteria dephosphorization has been proposed, this model has proposed can form polyphosphoric acid salt (Poly-P+PHB) composite particle precursor outside bacterial cell.
Chemical dephosphorization and ammonia nitrogen:
Use ammonium magnesium phosphate (MAP) precipitator method and remove phosphorus and ammonia nitrogen.Trimagnesium phosphate is commonly called as struvite by being white or yellow, brown, the grey crystal that is insoluble in water, is a kind of slow release fertilizer, and the ratio that contains Mg, N, P is 1:1:1, and the pH value is the key that forms this compound manure.Its reaction formula is:
MAP technique can be taken out the nitrogen in the sewage, phosphorus and be reclaimed as fertilizer sources, is subject in recent years extensive concern., the yellow race quick such as Fujian buys, " chemical precipitation method is removed the experimental study of ammonia nitrogen in the Wastewater from Pig Farm ".(" chemistry and biotechnology ", 2005., 5:27-29.), Yuan Peng, Song Yonghui, Yuan Fang, Peng Jianfeng, " experimental study of nutritive element in the waste water of raising pigs is removed and reclaimed to the ammoniomagnesium phosphate crystal method " (" ACTA Scientiae Circumstantiae ", 2007,27(7): 1127-1134), Sun Guoping, Zhang Congliang, Wang Yan, " the MAP crystallization process is removed nitrogen, phosphorus processing condition in the piggery wastewater " (" ecological and rural environment journal ", 2010. 26(3): 268-272) etc. priority has been made report to chemical phosphorus removal method and processing condition.But most experimental researches that are limited to influence factor, coherent element proportioning and processing condition etc., and in the productivity sewage disposal, use also few.
Contriver Wang Ye duty, Wang Ruoxue, Li Qinsheng once take " artificial biological film process raise pigs sewage new technology " for topic to technology, product and the technical process adopted at " pollution prevention technique " magazine (2011.24(6): 26-29-56) made concise and to the point report, through looking into its content of new proof and the experimental study tool that has been reported is very different in recent home and abroad.In the present invention, comprised that also technical process improves and gordian technique wherein, and the sewage disposal demonstration project of raising pigs passes through the check of a year and a half actual motion effect, reached or be better than the new progresses such as livestock and poultry cultivation sewage drainage standard of Pearl River Delta.
Summary of the invention
The objective of the invention is to be to provide the method for a kind of high phosphorus, high-ammonia-nitrogen sewage dephosphorization denitrogenation, resource recovery, easy to implement the method, dephosphorization, denitrogenation are carried out simultaneously, and its resultant can be used as fertilizer and recycles, treatment effect is good, cost is low, easy and simple to handle, without the discharging of excess sludge or chemical sludge.Solve the processing problem of raise pigs sewage and other the similar organic sewage that contain high concentration phosphorus and ammonia nitrogen, reached or be better than the emission standard of country's permission, reduced receiving water body phosphorus, nitrogen nutrition load, reduced body eutrophication, protected water surrounding.
In order to realize above-mentioned purpose, the present invention adopts following technical measures:
Contriver Wang Ye duty, Wang Ruoxue, Li Qinsheng once take " artificial biological film process raise pigs sewage new technology " for topic to technology, product and the technical process adopted at " pollution prevention technique " magazine (2011.24(6): 26-29-56) made concise and to the point report, through looking into its content of new proof and the experimental study tool that has been reported is very different in recent home and abroad.In the present invention, comprised that also technical process improves and gordian technique wherein, and the sewage disposal demonstration project of raising pigs passes through the check of a year and a half actual motion effect, reached or be better than the new progresses such as livestock and poultry cultivation sewage drainage standard of Pearl River Delta.The feature of this technique is during the natural pond liquid behind the sewage biogas fermentation of raising pigs is processed, to adopt the artificial biological film tertiary treatment of difference in functionality polyP bacteria, and biological denitrification denitrogenation, dephosphorization are generated the ammonium magnesium phosphate method with chemical dephosphorization and combine, and improves decontamination effect improving.
The method that a kind of high phosphorus, high-ammonia-nitrogen sewage dephosphorization denitrogenation, resource reclaim by the 100 ton per days sewage disposal scale of raising pigs, the steps include:
A, enter in the sewage collecting pool at the natural pond liquid of sewage behind biogas fermentation of raising pigs, then enter modified pond.Plate-like micro-hole aerator (specification ф 178, and every square meter 2-3, uniform plane is arranged) is installed in modified pond, and by 4KW blower fan air feed, aeration 2-6 hour, the pH to 7.5-9 of raising sewage utilized the endogenous Mg in the sewage
++, NH
4-N
+, and PO
4 -3Ion forms the ammonium magnesium phosphate precipitation, reaches to remove part phosphorus and ammonia nitrogen, reclaims as fertilizer sources, and all the other sewage enter in the artificial biological film low-level culture pool and process; If phosphorus content is too high in this stage sewage, or endogenous magnesium ion then adds mixed magnesium salt 1-10kg when not enough in right amount, after stirrer (2.2KW) mixes accelerated reaction in 4-6 hour, allows its quiescent setting reclaim ammonium magnesium phosphate fertilizer in 12 hours under water again.
B, in the artificial biological film low-level culture pool, the bottom is equipped with micro-hole aerator (specification ф 178, every square meter 2-3, uniform plane is arranged), by 7.5kw blower fan intermittent gas supply, sets up aerobic/anaerobic or anaerobic environment.In the artificial biological film low-level culture pool, lay the artificial biomembrane floating suspended device 500-1000 cover of being produced by Yishengquan Biological Science ﹠ Tech. Development Co., Ltd., Wuhan.
The installation method of artificial biomembrane floating suspended device (ZL200920229801.X): relatively fixing in treating pond for making artificial biomembrane floating suspended device, during use can with corrosion-resistant, be difficult on the hook of wall that aging plastic ties is fixed on treating pond after with the series winding of the ball float on the float suspended device.
Adopt the artificial biological film (Yishengquan Biological Science ﹠ Tech. Development Co., Ltd., Wuhan) that contains genus bacillus polyP bacteria and nitrobacteria to be staggeredly placed in the artificial biological film low-level culture pool, its major function is to decompose macromole, utilize COD to do the C source, carry out denitrification dephosphorization denitrification; With the sewage of raising pigs after processing enter artificial biological film secondary pond, artificial biological film is processed in three grades of ponds.
C, lay 10 of the aeration tubes (uniform plane placement) of 20m in artificial biological film second-stage treatment pond bottom, by 2.2kw blower fan air feed; Lay artificial biomembrane floating suspended device 200-500 cover (the same B of laying method) in the pond.Be fixed with genus bacillus (Yishengquan Biological Science ﹠ Tech. Development Co., Ltd., Wuhan) and photosynthetic bacterium class polyP bacteria (Yishengquan Biological Science ﹠ Tech. Development Co., Ltd., Wuhan) on the artificial biological film in the artificial biological film secondary pond, adopt the aeration tube intermittent aeration.
D. lay 10 of the aeration tubes (uniform plane placement) of 20m bottom in the artificial biological film tertiary treatment pond, by 2.2kw blower fan air feed; Respectively lay artificial biomembrane floating suspended device 200-500 cover (the same B of laying method) in the pond.The artificial biological film of photosynthetic bacterium preparation is then adopted in artificial biological film tertiary treatment pond.
Use the artificial biological film (ZL200610124636.2) of different microorganisms preparation, by above-mentioned A, B, C, the effect of D step denitrification dephosphorization denitrification, realize the purpose of dephosphorization and ammonia nitrogen, then enter oxidation pond.
E. oxidation pond is processed: phosphorus, nitrogen more than planting aquatic plants absorption of residual in the pool.According to area and season different, select local suitable non-hibernating eggs class (as leading to heart dish, green water cress etc.).These plant growings are convenient to results on artificial floating bed movably.And the difference of pressing various plant growth rates, arranging plantation and harvest time, the waterplant of results is as the green fodder of pig.
The above sewage treatment process of raising pigs take artificial biological film as core technology, more simplify than the original report of contriver, because this system is in actual motion, can reach or be better than legal emission standard to the oxidation pond stage, artificial swamp can be simplified, and can save land area; Before modified pond, whether need solid-liquid separation, in can the sewage by each pig farm the content of larger granular solids thing what and decide.In addition, the kind of artificial biological film, consumption and supplementary material thereof such as aerating apparatus and power of fan etc. appropriately adjust because of character, the scale of disposing of sewage.
Use the artificial biological film of polyP bacteria preparation and realize sewage dephosphorization, denitrogenation:
This sewage dephosphorization of raising pigs, denitrifying method are the artificial biological films that adopts fixing polyP bacteria to prepare at carrier, finish the denitrification nitrogen and phosphorus removal effect by the polyP bacteria in the film, generation contains polyphosphoric acid salt (poly-P) and poly beta-hydroxybutyrate (PHB) composite junction crystal outside born of the same parents, and is aided with chemical dephosphorization reaction generation ammonium magnesium phosphate (MAP) crystalline deposit.This two classes xln all can be used as high-quality phosphate fertilizer and recycles, thereby phosphorus and the ammonia nitrogen of the sewage middle and high concentration of will raising pigs are removed in a large number.
Used polyP bacteria comprises genus bacillus and photosynthetic bacterium among the present invention:
Different polyP bacterias is fixed respectively and makes different artificial biological films, and be placed in the corresponding artificial biological film treating pond, by the aerobic/anaerobic condition alternately, utilize COD for the nitration product that C source and nitrobacteria provide, realize releasing phosphorus/poly-phosphorus process and denitrification nitrogen and phosphorus removal.
Generation is reacted in the said ammonium magnesium phosphate crystallization of the present invention in the modified pond of sewage disposal:
The utilization already present Mg in the sewage that raises pigs
++, NH
4-N
+, and PO
4 -3Ion improves the pH value by modified pond aeration, makes the generation ammonium magnesium phosphate.Aeration, stirring and pH value are the important factors that affects crystallization content.
When the endogenous magnesium ion is not enough in the sewage phosphorus content is higher, can in modified pond, add the mixing magnesium salts.Its effect both can improve the pH value to 8.5-9.0, also can strengthen ammonia nitrogen and phosphatic reaction, improved both clearances;
Range of application of the present invention:
The invention is not restricted to the sewage disposal of raising pigs, also can be other organic sewage processing that contains high concentration phosphorus and ammonia nitrogen efficient dephosphorization, denitrogenation method are provided.
The present invention compared with prior art has the following advantages and effect:
1. the sewage treatment facility of raising pigs and technical process are succinct, use artificial biological film and process the sewage genus the first of raising pigs;
2. save energy reduces working cost: adopt intermittent aeration in the treating processes, save energy consumption more than 30%;
3. management, easy and simple to handle;
4. crossed over experimental stage, reached sewage treatment project and practice, and obtained sewage disposal reuse up to standard, nitrogen, reclamation of phosphorus resource utilization, without the good result of mud, wastewater disposition.
Description of drawings
Fig. 1 is that a kind of artificial biological film is processed the sewage process flow diagram of raising pigs
Wherein: 1 one sewage collecting pools; 2 one modified ponds; 1 grade of pond of 3 one artificial biological films; 3 grades of ponds of 5 one artificial biological films, 2 grades of ponds of 4 one artificial biological films; 6 one oxidation pond
Figure 1A is a kind of Poly-P-PHB composite junction crystal photo in kind that is formed by the polyP bacteria enrichment
Phosphate-containing 40% in the xln, and sudan black dyeing is for black, and is water insoluble, is dissolved in acid.
Figure 1B is a kind of Poly-P-PHB composite junction crystal photo in kind that is formed by the polyP bacteria enrichment
Crystallization adularescent and light brown, form differ, the little not enough mm of crystallization, and large xln can surpass cm.
Embodiment
Embodiment 1:
The method that a kind of high phosphorus, high-ammonia-nitrogen sewage dephosphorization denitrogenation, resource reclaim: the 100 tons of scales of per diem disposing of sewage are calculated, and the steps include:
A, the natural pond liquid of sewage behind biogas fermentation enters in the sewage collecting pool 1 raising pigs, then pump into modified pond 2, (specification ф 178 by the plate-like micro-hole aerator therein, 2.5 of every square meters, (uniform plane placement) 145 is by 4KW blower fan air feed, continuous aeration 6 hours, improve the pH to 7.5-9 of sewage, produce a large amount of foams in the sewage this moment, utilizes the endogenous Mg in the sewage
++, NH
4-N
+, and PO
4 -3Ion forms the ammonium magnesium phosphate crystallization, allows its precipitation, can remove in the sewage approximately about 40% phosphorus and part ammonia nitrogen, reclaims fertilizer.If phosphorus content is too high in this moment sewage, or endogenous magnesium ion then adds mixed magnesium salt 1-10kg when not enough in right amount, improves the growing amount of phosphoric acid magnesium salts and the clearance of phosphorus.
B, in artificial biological film low-level culture pool 3, microporous aeration device is installed at the bottom of the pond, and (specification ф 178,2.5 of every square meters; 500 (uniform plane placement)) by 7.5kw blower fan intermittent aeration, namely ventilated 4 hours, shut down 2 hours; repeatedly carry out, set up aerobic/anaerobic or anaerobic environment.In the artificial biological film low-level culture pool, lay artificial biomembrane floating suspended device 600 covers (laying method is with summary of the invention B), wherein 450 the cover contain the genus bacillus polyP bacteria and 150 the cover nitrobacterias artificial biological films be staggeredly placed, its function is to decompose macromole, utilize COD to do the C source, carry out denitrification dephosphorization denitrification; The sewage of raising pigs after processing is entered processing in artificial biological film secondary pond 4, three grades of ponds 5 of artificial biological film.
C, lay long 10 of the aeration tubes (uniform plane placement) of 20m in 4 bottoms, artificial biological film second-stage treatment pond, by 2.2kw blower fan air feed; Respectively lay artificial biomembrane floating suspended device 250 covers (laying method is with summary of the invention B) in the pond.Be fixed with genus bacillus and photosynthetic bacterium class polyP bacteria on the artificial biological film in the artificial biological film secondary pond 4, adopt the aeration tube intermittent aeration, namely ventilated 2 hours, stop 10 hours.
Long 10 of the aeration tubes (uniform plane placement) of 20m are laid in the bottom in D, the artificial biological film tertiary treatment pond 5, by 2.2kw blower fan air feed; Respectively lay artificial biomembrane floating suspended device 250 covers (laying method is with summary of the invention B) in the pond.The main artificial biological film of using the polyP bacteria preparation of photosynthetic bacterium class adopts the aeration tube intermittent aeration in three grades of pond 5 treating ponds of artificial biological film.
The installation method of E, artificial biomembrane floating suspended device: relatively fixing in treating pond for making artificial biomembrane floating suspended device, during use can with corrosion-resistant, be difficult on the hook of wall that aging plastic ties is fixed on treating pond after with the series winding of the ball float on the float suspended device.
By their denitrification dephosphorization denitrification effect, realize dephosphorization and ammonia nitrogen, make fertilizer in the recycling precipitate that artificial biological film 1-3 level treating pond generates, the sewage of raising pigs of process A, B, C, D step process enters oxidation pond 6.
The effect of high phosphorus, high-ammonia-nitrogen sewage processing technological flow
A. the sewage disposal demonstration project of raising pigs application example:
(1) patent applicant uses the New Technology about Wastewater Treatment of raising pigs take artificial biological film as core, has set up the novel process of sewage disposal.Process comprising biogas fermentation-modified pond-artificial biological film 1-3 level, remaining phosphorus and ammonia nitrogen, be converted into green fodder by the oxidation pond waterplant and recycle, water quality is reached or be better than the Pearl River Delta livestock and poultry sewage drainage standard (table 1) of raising pigs, check and accept by local Environmental Protection Agency.
Each unit water quality detection result (mg/L) of pig farm, table 1. Ru Hu farm purification system
(2) denitrogenation of artificial biological film:
The usefulness such as Wang Yeqin are fixed with artificial biological film and the common purification system that forms of nitrobacteria microbial film of the genus bacillus preparation of denitrification denitrogenation effect, has the powerful function that transforms ammonia nitrogen and nitrite nitrogen, can almost all remove wherein ammonia nitrogen and nitrite nitrogen, show that artificial biological film has very high denitrification efficiency (Wang Yeqin, Li Qinsheng.2009. the denitrogenation of artificial biological film." pollution prevention technique magazine ", 22(6): 17-22); And process the denitrification denitrogenation effect that the effect of the sewage of raising pigs has further been confirmed artificial biological film with artificial biological film.
(3) polyP bacteria comes extracellular poly-phosphate crystalline particle:
The patent applicant has collected and used the polyphosphoric acid salt crystalline particle that bacterial strain forms outside born of the same parents.These granular sizes differ, and little diameter is not as good as mm, and large crystallization diameter can surpass cm.Color is light brown or white, and is water insoluble, is dissolved in the diluted acid of the vitriol oil and heating.This crystalline particle phosphorus content reaches 13% by analysis, is equivalent to contain 40% poly-phosphate.It can be partly dissolved by chloroform by sudan black B stain, meets the characteristic of poly beta-hydroxybutyrate (PHB).The structural formula of this class complex body is as follows.
The structural formula of PHB-Poly-P
This is first tangible evidence about the polyP bacteria biological phosphate-eliminating that the applicant obtains.(see Figure 1A-1B).It should be noted that this class material has very high using value at aspects such as medicine, the energy and chemical industry.
(4) ammonium magnesium phosphate precipitator method chemical dephosphorization:
Its concrete steps are:
① First, sewage aeration will get rid of carbon dioxide, improving wastewater pH to 8.0 or more, which is part of the sewage and ammonium phosphate, magnesium phosphate, magnesium ammonium ion reaction crystallization;
2. then start stirrer and drop into the magnesium salts mixture in treating pond, further improve about pH to 9, the ammonium magnesium phosphate precipitation is produced in reaction again;
3. then stop to stir, allow crystalline deposit, it is reclaimed the as fertilizer sources utilization, reach the purpose of removing nitrogen, phosphorus.
The experimental study of the high ammonia nitrogen pharmaceutical wastewater of embodiment 2. high phosphorus dephosphorization denitrogenation:
A. the applicant adopts and mixes magnesium salts processing high phosphorus, high ammonia nitrogen medicine factory effluent, ammonia nitrogen concentration is up to 1400mg/L in this waste water, when dropping into the 1-2% magnesium salts in waste water, the phosphorus that 90% in the waste water is above and the ammonia nitrogen of 32-50% are by the magnesium salts Adsorption up to 1360mg/L. for phosphorus concentration.
Its concrete steps are:
1. at first aeration improves more than the pH to 8.0 of medical sewage;
2. then start stirrer and drop into the magnesium salts mixture in treating pond, further improve about pH to 9, the ammonium magnesium phosphate precipitation is produced in reaction again;
3. stop to stir, allow the ammonium magnesium phosphate crystalline deposit, it is reclaimed, reach the purpose of removing nitrogen, phosphorus.
B. the polyP bacteria bacterial strain is to the dephosphorization effect of high phosphorus waste water:
The patent applicant selects 5 bacillus and 1 strain photosynthetic bacterium, detects them to the phosphorus ability of taking the photograph of the medical fermentation waste water of high phosphorus, high ammonia nitrogen.Initial ammonia nitrogen concentration is up to 1400mg/L, and phosphorus concentration only has phosphorus 0-20mg/L up to the general sanitary sewage of 1360mg/L(), after 22 hours shaking tables are cultivated, the phosphorus amount of taking the photograph of 6 bacterial strains between 210-310mg/L, average out to 260mg/L.
Claims (1)
1. a high phosphorus, high-ammonia-nitrogen sewage dephosphorization denitrogenation, its recovery method as resource the steps include:
A, the natural pond liquid of sewage behind biogas fermentation enters in the sewage collecting pool (1) raising pigs, then enter modified pond (2), the plate-like micro-hole aerator is installed in modified pond, make pH to 7.5-9 by the blower fan aeration, utilize endogenous Mg++, NH4-N+ and PO4-3 ion in the sewage to form the ammonium magnesium phosphate precipitation, optionally add the mixing magnesium salts, after stirrer mixes accelerated reaction under water, allow its quiescent setting reclaim ammonium magnesium phosphate fertilizer, all the other sewage enter in the artificial biological film low-level culture pool (3) and process again;
B, in artificial biological film low-level culture pool (3), the bottom is equipped with micro-hole aerator, by the blower fan intermittent gas supply, in artificial biological film low-level culture pool (3), lay artificial biomembrane floating suspended device, the artificial biological film that wherein contains genus bacillus polyP bacteria and nitrobacteria is staggeredly placed, decompose macromole, utilize COD to do the C source, carry out denitrification dephosphorization denitrification; The sewage of raising pigs after processing is entered processing in artificial biological film secondary pond (4), the three grades of ponds of artificial biological film (5);
C, lay aeration tube in artificial biological film second-stage treatment pond (4) bottom, by the blower fan intermittent gas supply; Lay artificial biomembrane floating suspended device in the pond, be fixed with genus bacillus and photosynthetic bacterium class polyP bacteria on the artificial biological film;
Aeration tube is laid in the bottom in D, the artificial biological film tertiary treatment pond (5), by the blower fan air feed, lays artificial biomembrane floating suspended device in the pond, adopts the artificial biological film of photosynthetic bacterium polyP bacteria preparation;
E. oxidation pond (6) is processed: phosphorus, nitrogen more than planting aquatic plants absorption of residual in the pool, according to area and season different, select logical heart dish, green water cress plant growing on mobile artificial floating bed, and the difference of pressing various plant growth rates, arrange plantation and harvest time, the waterplant of results is as the green fodder of pig.
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| CN103588361A (en) * | 2013-11-22 | 2014-02-19 | 苏州科特环保设备有限公司 | Method for removing total phosphorus in waste water through chemical/biological reaction synergistic effect |
| CN103588361B (en) * | 2013-11-22 | 2016-02-24 | 苏州科特环保设备有限公司 | A kind of chemical/biological reaction synergy removes the method for total phosphorus in waste water |
| CN105174528A (en) * | 2015-07-18 | 2015-12-23 | 常州市鼎日环保科技有限公司 | Method for recovering phosphorus in culturing farm biogas slurry |
| CN105505810A (en) * | 2015-09-16 | 2016-04-20 | 广州金水动物保健品有限公司 | Microbe composition and use thereof |
| CN105254120A (en) * | 2015-10-16 | 2016-01-20 | 上海纳米技术及应用国家工程研究中心有限公司 | Advanced treatment method of phosphate sewage |
| CN105585210A (en) * | 2015-12-23 | 2016-05-18 | 常熟理工学院 | Novel technology for treating aquaculture wastewater of fungus-aquatic plant symbiotic system |
| CN105621571A (en) * | 2016-02-03 | 2016-06-01 | 安徽乙地生态科技有限公司 | Sponge for dephosphorization and denitrification in wastewater treatment process |
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| CN107760619A (en) * | 2017-09-30 | 2018-03-06 | 河北天泓环保科技有限公司 | Water process net carries catalytic resin enzyme body and its application method |
| CN108675521A (en) * | 2018-05-21 | 2018-10-19 | 方建波 | A kind of method of biogas slurry treatment |
| CN112779021A (en) * | 2021-02-03 | 2021-05-11 | 中南大学 | Phosphorus-containing heavy metal contaminated soil remediation material and preparation method and application thereof |
| CN112779021B (en) * | 2021-02-03 | 2021-10-15 | 中南大学 | Phosphorus-containing heavy metal contaminated soil remediation material and preparation method and application thereof |
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