CN102775020B - Coupling type sewage purification and regeneration treating method capable of removing phosphorus efficiently - Google Patents
Coupling type sewage purification and regeneration treating method capable of removing phosphorus efficiently Download PDFInfo
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- CN102775020B CN102775020B CN201210259355.3A CN201210259355A CN102775020B CN 102775020 B CN102775020 B CN 102775020B CN 201210259355 A CN201210259355 A CN 201210259355A CN 102775020 B CN102775020 B CN 102775020B
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Abstract
The invention discloses a coupling type sewage purification and regeneration treating method capable of removing phosphorus efficiently. The method takes municipal sewage as a treatment object and includes: a, preliminary precipitation; b, phosphorous removal through conversion of the phosphorous in the sewage into phosphine; c, conversion of the phosphine; and d, recycling of purified water. According to the method, the municipal sewage is recycled, sludge after the sewage treatment is recycled completely, organic pollutants are removed, denitrification is achieved, and the technical gap of efficient conversion and usage of the phosphine at present is filled.
Description
Technical field
The present invention relates to sewage disposal and reclaim field, relate in particular to a kind of manifold type sewage purification regeneration treating method of efficient dephosphorization.
Background technology
Phosphorus is as a kind of limited resources that can not Natural re generation on the earth, in global range ubiquity landing field phosphate mineral resources day by day deficient with water surrounding in phosphorus content too high and cause this contradiction of body eutrophication.Body eutrophication problem is one of current main environmental problem, has seriously restricted society and economic Sustainable development.Phosphorus is one of important factor of bringing out body eutrophication as nutritional factor.Wherein the phosphorus in water body is mainly derived from sanitary sewage, washing composition and trade effluent, and the phosphorus of how effectively removing in waste water is the hot issue of countries in the world environmental engineering investigator research always.Investigator has carried out a large amount of research to dephosphorization theory, technology and related process thereof both at home and abroad.But most of to consume ample resources, energy as cost is by the pollutant removal such as nitrogen, phosphorus in sewage, exist " consuming energy " to pollute the shortcoming of marrying again.So, the technology of phosphorus removal from wastewater that breaks traditions, it is the focus that scientific circles pay close attention to that the resource utilization that realizes phosphor in sewage becomes.
In recent years with struvite (MAP:MgNH
4pO
46H
2o) form is recovered as study hotspot.The dephosphorization technique reclaiming with struvite form can be used for processing high-concentration ammonia nitrogenous wastewater and high concentration phosphorus hydrochlorate waste water and contain ammonia nitrogen in high density and phosphate waste simultaneously, can also reduce the atmosphere greenhouse gases that produce some oxynitride types in waste water.But these researchs mainly lay particular emphasis on chemical recovering method processing, chemical method dephosphorization is not only that medicament is expensive, working cost is higher, make in addition a large amount of anionic residues stay in water, cause the salinity of water to increase, cause secondary pollution, the content of nitrogen and phosphorous of water outlet simultaneously does not all also reach emission standard, also needs to be used as further processing.
And biological phosphate-eliminating coupling phosphor resource process is the technological line of economical rationality, this technology also becomes possibility gradually.In the time of the total amount migration and variation rule of research sewage work phosphorus, find that first its total phosphorus loss reaches 30%-45%, and confirmed that the loss of phosphorus enters atmosphere mainly with gaseous phosphine form.And then phosphuret-(t)ed hydrogen all detected in places such as wetland, refuse landfill, plants, even in the biosphere in the South Pole, all there is the existence of phosphuret-(t)ed hydrogen.Now there are some researches show, the phosphorus in sewage may be served as the precursor of phosphuret-(t)ed hydrogen completely, under anaerobion effect, is reduced generation phosphuret-(t)ed hydrogen, exists with free state, matrix ADSORPTION STATE phosphuret-(t)ed hydrogen (matrix-bound) form.Early stage the investigation of phosphorus in anaerobic waste water treating processes is found according to us, wherein total phosphorus loss maximum reaches 78%.These find sewage dephosphorization and phosphorus recovery working cycle that thinking is provided, and it not only shows that, in sewage dephosphorization process, phosphorus can be removed with gaseous form, also shows that phosphorus can carry out with gaseous form resource utilization recovery in working cycle.So the discovery of phosphuret-(t)ed hydrogen in sewage treatment process caused people's common concern at once, how does it produce in technology of phosphorus removal from wastewater? how does it participate in removal and the resource recycling of sewage phosphorus? does phosphuret-(t)ed hydrogen enter after producing how water body, atmosphere are collected, resource utilization? the new way of removing, circulating for the anaerobe removal, resource utilization mechanism, the exploitation sewage phosphorus that disclose sewage phosphorus has important scientific meaning and application prospect.
In the biogeochemical cycle of phosphorus, think that for a long time gaseous phosphine is non-existent at nature always.Until 1988, investigator finds that the phosphorus of sewage work's loss enters atmosphere with gaseous phosphine form first.Subsequently, in refuse landfill, plant, river and organism, detect successively the phosphuret-(t)ed hydrogen existing with free state form, along with phosphuret-(t)ed hydrogen is detected one after another in varying environment, phosphuret-(t)ed hydrogen is finally confirmed to be a kind of trace gas being extensively present in atmosphere.The discovery of Phosphine in Natural Environment is the important supplement to phosphorus Cyclical Theory, and having changed the phosphorus of thinking in the past in atmosphere is the incorrect view being made up of the inorganic phosphate being attached on air participates or depositing dust particle.Therefore,, in the biogeochemical cycle of phosphorus, must consider existence and status and the effect of phosphuret-(t)ed hydrogen.Because Phosphine in Natural Environment content is very micro-, be subject to the impact of the conditions such as collection, preservation, enrichment and the detection technique of sample, early stage analytical procedure and technique means are difficult to realize the quantitative assay to Environmental Trace phosphuret-(t)ed hydrogen, about the research of phosphuret-(t)ed hydrogen behavior in environment is not also extensively carried out.
Phosphuret-(t)ed hydrogen is a kind of poisonous and active reducing gas that can be carcinogenic, human body suck just can cause on a small quantity feeling sick, the symptom such as vomiting, uncomfortable in chest, diarrhoea, when serious, can cause the pulmonary edema death of even going into a coma.So the discovery of this compound in environment causes people's common concern at once, setting up sensitive reliable analytical procedure is the prerequisite of carrying out phosphuret-(t)ed hydrogen research in environment.
Therefore study phosphorus in sewage dephosphorization anaerobic reactor system and technique thereof how to change into phosphuret-(t)ed hydrogen, phosphuret-(t)ed hydrogen how about to waste water water body discharge, how it to produce and the final problem such as stable resources how in reactor, and then disclose the conversion process of Phosphorus From Wastewater and remove mechanism, set up resource utilization process engineering for regenerating, to widening the range of application of sewage dephosphorization biotechnology, the technology that changes tradition " consuming energy " is significant.
Having there are some researches show that lake, wetland, rice terrace are one of source of gaseous phosphine in atmosphere, is also the most important remittance of gaseous phosphine.Gassmann detects PH first in Hamburg, Germany port and German gulf bottom unfiltered water body
3, its concentration is up to 12.5 pgL-1, and PH after identical water body filtration, do not detected
3.The applicant all detects PH in Taihu Lake and the filtration of oolong pool and unfiltered water body
3exist, do not filter lake water than the PH filtering in lake water
3content is high 2～14 times, PH in lake water
3vertical change very little, also find that concentration in the concentration ratio lake water of ADSORPTION STATE phosphuret-(t)ed hydrogen in settling is up to 103-105 doubly simultaneously.These investigators all think PH in water body
3mainly exist with the form of matrix-bound phosphine (MBP).The bright grades of Yu Zhi in 2002 detect the matrix-bound phosphine of ng/kg (dry weight) order of magnitude first in the settling of typical case's cultivation marine site, Jiaozhou Bay, and its concentration reaches as high as 685ng/kg.Female clear woods etc. been has also has been investigated and analysed content and the distribution of Sediments In Jiaozhou Bay mesostroma combined hydrogen phosphide, and detected result shows that phosphuret-(t)ed hydrogen maximum concentration reaches 43.75ng/kg (dry weight).Generation, the sludge absorption of sewage phosphuret-(t)ed hydrogen not only directly affect dephosphorization efficiency by using, and directly and its resource utilization process closely related, therefore, necessary mud mesostroma combined hydrogen phosphide is furtherd investigate.
In sewage phosphorus treating processes, first the gaseous phosphine that the generations such as anaerobion discharge will reach adsorption-desorption balance with mud before being discharged into atmosphere, and the excessive gaseous phosphine not being adsorbed is just discharged into the atmosphere.Phosphor in sewage can generate phosphuret-(t)ed hydrogen through the reductive action of microorganism, and the phosphuret-(t)ed hydrogen in sewage is easy to be adsorbed on mud granule, forms matrix-bound phosphine (MBP).Therefore, carry out the desorption of mud mesostroma combined hydrogen phosphide in a deep going way, for collection, the stable resourcesization research of phosphor in sewage hydrogen, find the approach that improves sewage phosphorus clearance, build the process for reclaiming of phosphor in sewage under anaerobic condition, develop continuable sewage disposal, resource recovery technology all has important meaning, the at present domestic and international rarely seen report of research of this respect.
Phosphorus is one of most important element in soil.In China, 74% arable soil lacks phosphorus, and the phosphorus in soil more than 95% is invalid form, and farm crop are difficult to directly absorb, so the bioavailability of phosphorus is the focus that scientific circles pay close attention to always.Phosphuret-(t)ed hydrogen is easy to be adsorbed on soil particle, forms matrix-bound phosphine, and in the research such as Han discovery soil, 0.74% of total phosphorus is converted into phosphuret-(t)ed hydrogen and is stored in soil, and the phosphuret-(t)ed hydrogen of generation is very easily by storage that soil particle adsorbs.In the resource utilization process of sewage dephosphorization coupling phosphorus, if the phosphorus in sewage can be converted into phosphuret-(t)ed hydrogen, height absorption storage by phosphuret-(t)ed hydrogen in adsorption by soil agent, and be administered in soil, phosphuret-(t)ed hydrogen in adsorption by soil agent will change the reactive phosphate easily being absorbed by farm crop into, especially aobvious important for phosphorus restriction soil.For promoting that agriculture Sustainable development is significant, at home and abroad there is no at present the research report of this respect.
The following problem existing in order to overcome current spoil disposal dephosphorization major technique: one, sludge discharge is large, it is large that excess sludge is disposed difficulty.The blank that effectively transforms this respect technology for current phosphuret-(t)ed hydrogen, has proposed the present invention.
Summary of the invention
The object of the invention is to overcome the deficiency that prior art exists, a kind of manifold type sewage purification regeneration treating method of efficient dephosphorization is provided, concrete technical scheme is as follows.
A manifold type sewage purification regeneration treating method for efficient dephosphorization, comprises the following steps:
A) preliminary sedimentation:
The sewage that sewer line is collected enters sand setting water collecting basin after filtering removal solid sundries by coarse rack, logical
Cross water pump sand setting water collecting basin sewage is extracted after lifting is filtered a small amount of silt particle by fine fack and enters adjustment pond, by the ejector of water circulating pump and connection, fill the boring aeration pipe water flowing aeration laying and stir water body to bottom, pond, maintenance water quality is relatively stable;
B) phosphorus in sewage is converted into phosphuret-(t)ed hydrogen dephosphorization:
By aeration rate is concentrated and is distributed in film-bioreactor (Membrane Bio-Reactor, MBR) below, Mo district, in described film district, local formation dissolved oxygen concentration is greater than the aerobic zone of 2.02mg/L, other region dissolved oxygen concentration is less than 1.02mg/L, and by forming circulation flow location form (by stirring or add recycle pump), form the flow location form that is alternately distributed of the aerobic-oxygen-anaerobism of holding concurrently, realize the biochemical reaction environment of aerobic suction phosphorus-anaerobic phosphorus release; Be 15000～25000mg/L by maintaining sludge concentration in described film-bioreactor, improved the autodigestion speed of mud, promoted amphimicrobe digestion death to release phosphorus; Phosphorus anaerobic zone by Microbiological release out after, under the effect of the phosphoric acid salt reducing bacteria in described film-bioreactor, be converted into phosphuret-(t)ed hydrogen and discharge, and deposit air reservoir through aerating system stripping in through pipeline, will after the water precipitation 60-80 after above-mentioned dephosphorization minute, obtain supernatant liquor;
C) conversion of phosphuret-(t)ed hydrogen:
Pipeline access sludge sump stirring for phosphuret-(t)ed hydrogen in the air reservoir that step b) is obtained, phosphuret-(t)ed hydrogen is easy to be adsorbed on mud granule, form matrix-bound phosphine MBP, add again adsorption by soil agent, height absorption storage by phosphuret-(t)ed hydrogen in adsorption by soil agent, is administered in soil, and the phosphuret-(t)ed hydrogen in adsorption by soil agent will change the reactive phosphate easily being absorbed by farm crop into, be phosphate fertilizer, the soil existing with invalid form for phosphorus shortage soil or phosphorus;
The recovery of d) purifying waste water:
The supernatant liquor that step b) is obtained is sent into sterilization pool through pipeline, through short mix method cholorination, i.e. and clorox or chlorinated lime or chlorine tablets sterilization, postprecipitation 1-1.2 hour, essence filter, removes the residual impurity in water, obtains processing purifying waste water of reclaiming.
Preferably, adsorption by soil agent can also be by 75 ~ 92% oxygenants, 5 ~ 20% described in it by mass percentage
Raising agent, 0 ~ 2% sorbent material, 0 ~ 2% anti-hard caking agent, 0 ~ 2% dispersion agent composition;
Further, the mixture that described adsorption by soil agent is the peat composed of rotten mosses and humic acid.In described adsorption by soil agent, the weight ratio blending ratio of the peat composed of rotten mosses and humic acid is 1:1.Described oxygenant is potassium permanganate;
Described raising agent is wood chip or white carbon black; Described anti-hard caking agent is Graphite Powder 99; Described dispersion agent is silicon-dioxide and flyash.
Preferably, adsorption by soil agent can also be to be mixed by 25～33% meadow peats, 20～33% sphagnum peats and 25～50% nitrogenous fertilizer described in it by mass percentage.
Preferably, anti-hard caking agent can also be to be mixed by 80～82% stearic acid, 15 ~ 22% industrial paraffins described in it by mass percentage.
Compared with prior art, tool of the present invention has the following advantages and effect:
The present invention is by aerating system is laid and is optimized, and by several aeration intensity membrane module bottoms that are distributed in, forming part, film district is aerobic zone, and inhaling phosphorus for microorganism aerobic provides biochemical reaction condition; Sewage Cong Mo district rises to top, film district through circulation flow location form, and because middle and lower part, dissolved oxygen Mo district is utilized fast by microorganism, top, Mo district and membrane module outside basically form aerobic area, and microorganism discharges phosphorus in aerobic area; By the crown_interception of microfiltration membrane, realize the enrichment and growth of phosphuret-(t)ed hydrogen reducing bacteria in system, for the gasification finish of phosphorus provides condition, by constructing the gasification finish biochemical reaction environment that is applicable to phosphorus, realize the new removing method of phosphorus, avoided the traditional technology route of traditional spoil disposal dephosphorization.
Overcome traditional biological dephosphorization sewage treatment process and be that to realize phosphorus be the release of phosphorus at double oxygen condition, prevent the accumulation of phosphorus in mud, need to adopt the oxygen+aerobic combined treatment modality of holding concurrently, structures split, take up an area large, the defect of operational management complexity.
Overcome the sludge disposal difficulty that existing routine biochemistry treatment process and membrane biological reactor process exist by spoil disposal dephosphorization large, take up an area large defect.
Embodiment
Embodiment 1
A manifold type sewage purification regeneration treating method for efficient dephosphorization, comprises the following steps:
A) preliminary sedimentation
The sewage that sewer line is collected enters sand setting water collecting basin after filtering removal solid sundries by coarse rack, logical
Cross water pump sand setting water collecting basin sewage is extracted after lifting is filtered a small amount of silt particle by fine fack and enters adjustment pond, by the ejector of water circulating pump and connection, fill the boring aeration pipe water flowing aeration laying and stir water body to bottom, pond, maintenance water quality is relatively stable;
B) phosphorus in sewage is converted into phosphuret-(t)ed hydrogen dephosphorization
By aeration rate is concentrated and is distributed in film-bioreactor (Membrane Bio-Reactor, MBR) below, Mo district, in described film district, local formation dissolved oxygen concentration is greater than the aerobic zone of 2.02mg/L, other region dissolved oxygen concentration is less than 1.02mg/L, and by forming circulation flow location form (by stirring or add recycle pump), form the flow location form that is alternately distributed of the aerobic-oxygen-anaerobism of holding concurrently, realize the biochemical reaction environment of aerobic suction phosphorus-anaerobic phosphorus release; Be 15000～25000mg/L by maintaining sludge concentration in described film-bioreactor, improved the autodigestion speed of mud, promoted amphimicrobe digestion death to release phosphorus; Phosphorus anaerobic zone by Microbiological release out after, under the effect of the phosphoric acid salt reducing bacteria in described film-bioreactor, be converted into phosphuret-(t)ed hydrogen and discharge, and deposit air reservoir through aerating system stripping in through pipeline, the water precipitation after above-mentioned dephosphorization is obtained to supernatant liquor after 60 minutes;
By the crown_interception of microfiltration membrane, realize the enrichment and growth of phosphuret-(t)ed hydrogen reducing bacteria in system, for the gasification finish of phosphorus provides condition, form following continuous biochemical reaction:
The absorption of phosphorus:
ADP+H
3pO
4+ energy → ATP+H
2o (aerobic environment)
The release of phosphorus:
ATP+H
2o → ADP+H
3pO
4+ energy (anaerobic environment)
The gasification of phosphorus transforms:
H
3pO
4+ phosphoric acid salt reducing bacteria → phosphuret-(t)ed hydrogen (anaerobic environment)
C) conversion of phosphuret-(t)ed hydrogen
Pipeline access sludge sump stirring for phosphuret-(t)ed hydrogen in the air reservoir that step b) is obtained, phosphuret-(t)ed hydrogen is easy to be adsorbed on mud granule, form matrix-bound phosphine (MBP: matrix-bound phosphine), add again adsorption by soil agent, height absorption storage by phosphuret-(t)ed hydrogen in adsorption by soil agent, be administered in soil, phosphuret-(t)ed hydrogen in adsorption by soil agent will change the reactive phosphate easily being absorbed by farm crop into, be phosphate fertilizer, the soil existing with invalid form for phosphorus shortage soil or phosphorus; Described adsorption by soil agent is the mixture of the peat composed of rotten mosses and humic acid, and blending ratio is 1:1;
The recovery of d) purifying waste water
The supernatant liquor that step b) is obtained is sent into sterilization pool through pipeline, through short mix method cholorination, i.e. and clorox or chlorinated lime or chlorine tablets sterilization, postprecipitation 1 hour, essence filter, removes the residual impurity in water, obtains processing purifying waste water of reclaiming.NO
2 -
Effluent quality is as following table:
Described in it, adsorption by soil agent can also be by 75% oxygenant, 20% by mass percentage
Raising agent, 1% sorbent material, 2% anti-hard caking agent, 2% dispersion agent composition; Described oxygenant is potassium permanganate; Described raising agent is wood chip or white carbon black; Described anti-hard caking agent is Graphite Powder 99; Described dispersion agent is silicon-dioxide and flyash.
Described in it, adsorption by soil agent can also be to be mixed by 33% meadow peat, 33% sphagnum peat and 34% nitrogenous fertilizer by mass percentage.Described in it, anti-hard caking agent can also be to be mixed by 82% stearic acid, 18% industrial paraffin by mass percentage.
Embodiment 2
A manifold type sewage purification regeneration treating method for efficient dephosphorization, this technique comprises the following steps:
A) preliminary sedimentation
The sewage that sewer line is collected enters sand setting water collecting basin after filtering removal solid sundries by coarse rack, logical
Cross water pump sand setting water collecting basin sewage is extracted after lifting is filtered a small amount of silt particle by fine fack and enters adjustment pond, by the ejector of water circulating pump and connection, fill the boring aeration pipe water flowing aeration laying and stir water body to bottom, pond, maintenance water quality is relatively stable;
B) phosphorus in sewage is converted into phosphuret-(t)ed hydrogen dephosphorization
By aeration rate is concentrated and is distributed in film-bioreactor (Membrane Bio-Reactor, MBR) below, Mo district, in described film district, local formation dissolved oxygen concentration is greater than the aerobic zone of 2.02mg/L, other region dissolved oxygen concentration is less than 1.02mg/L, and by forming circulation flow location form (by stirring or add recycle pump), form the flow location form that is alternately distributed of the aerobic-oxygen-anaerobism of holding concurrently, realize the biochemical reaction environment of aerobic suction phosphorus-anaerobic phosphorus release; Be 15000～25000mg/L by maintaining sludge concentration in described film-bioreactor, improved the autodigestion speed of mud, promoted amphimicrobe digestion death to release phosphorus; Phosphorus anaerobic zone by Microbiological release out after, under the effect of the phosphoric acid salt reducing bacteria in described film-bioreactor, be converted into phosphuret-(t)ed hydrogen and discharge, and deposit air reservoir through aerating system stripping in through pipeline, the water precipitation after above-mentioned dephosphorization is obtained to supernatant liquor after 80 minutes;
By the crown_interception of microfiltration membrane, realize the enrichment and growth of phosphuret-(t)ed hydrogen reducing bacteria in system, for the gasification finish of phosphorus provides condition, form following continuous biochemical reaction:
The absorption of phosphorus:
ADP+H
3pO
4+ energy → ATP+H
2o (aerobic environment)
The release of phosphorus:
ATP+H
2o → ADP+H
3pO
4+ energy (anaerobic environment)
The gasification of phosphorus transforms:
H
3pO
4+ phosphoric acid salt reducing bacteria → phosphuret-(t)ed hydrogen (anaerobic environment)
C) conversion of phosphuret-(t)ed hydrogen
Pipeline access sludge sump stirring for phosphuret-(t)ed hydrogen in the air reservoir that step b) is obtained, phosphuret-(t)ed hydrogen is easy to be adsorbed on mud granule, form matrix-bound phosphine MBP, add again adsorption by soil agent, height absorption storage by phosphuret-(t)ed hydrogen in adsorption by soil agent, is administered in soil, and the phosphuret-(t)ed hydrogen in adsorption by soil agent will change the reactive phosphate easily being absorbed by farm crop into, be phosphate fertilizer, the soil existing with invalid form for phosphorus shortage soil or phosphorus; Described adsorption by soil agent is the mixture of the peat composed of rotten mosses and humic acid, and blending ratio is 1:1;
The recovery of d) purifying waste water
The supernatant liquor that step b) is obtained is sent into sterilization pool through pipeline, through short mix method cholorination, i.e. and clorox or chlorinated lime or chlorine tablets sterilization, postprecipitation 1 hour, essence filter, removes the residual impurity in water, obtains processing purifying waste water of reclaiming.
Effluent quality is as following table:
Described in it, adsorption by soil agent can also be made up of 88% oxygenant, 7% raising agent, 1% sorbent material, 2% anti-hard caking agent, 2% dispersion agent by mass percentage; Described oxygenant is potassium permanganate; Described raising agent is wood chip or white carbon black; Described anti-hard caking agent is Graphite Powder 99; Described dispersion agent is silicon-dioxide and flyash.
Described in it, adsorption by soil agent can also be to be mixed by 25% meadow peat, 25% sphagnum peat and 50% nitrogenous fertilizer by mass percentage.Described in it, anti-hard caking agent can also be to be mixed by 80% stearic acid, 20% industrial paraffin by mass percentage.
It should be noted, all numerical value intervals of this patent can be realized, and because length is limit, enumerate partial parameters value at this.Finally it should be noted that: above embodiment only, in order to the technical scheme of this patent to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these amendments or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (1)
1. a manifold type sewage purification regeneration treating method for efficient dephosphorization, this technique comprises the following steps:
A) preliminary sedimentation
The sewage that sewer line is collected enters sand setting water collecting basin after filtering removal solid sundries by coarse rack, by water pump, sand setting water collecting basin sewage is extracted after lifting is filtered a small amount of silt particle by fine fack and enters adjustment pond, by the ejector of water circulating pump and connection, the boring aeration pipe water flowing aeration laying to bottom, pond dress and stirring water body, keep water quality relatively stable;
B) phosphorus in sewage is converted into phosphuret-(t)ed hydrogen dephosphorization
By being concentrated, aeration rate is distributed in below, film-bioreactor Mo district, in described film district, local formation dissolved oxygen concentration is greater than the aerobic zone of 2.02mg/L, other region dissolved oxygen concentration is less than 1.02mg/L, and by forming circulation flow location form by stirring or add recycle pump, form the flow location form that is alternately distributed of the aerobic-oxygen-anaerobism of holding concurrently, realize the biochemical reaction environment of aerobic suction phosphorus-anaerobic phosphorus release; Be 15000～25000mg/L by maintaining sludge concentration in described film-bioreactor, improved the autodigestion speed of mud, promoted amphimicrobe digestion death to release phosphorus; Phosphorus anaerobic zone by Microbiological release out after, under the effect of the phosphoric acid salt reducing bacteria in described film-bioreactor, be converted into phosphuret-(t)ed hydrogen and discharge, and deposit air reservoir through aerating system stripping in through pipeline, the water precipitation after above-mentioned dephosphorization is obtained to supernatant liquor after 80 minutes;
By the crown_interception of microfiltration membrane, realize the enrichment and growth of phosphuret-(t)ed hydrogen reducing bacteria in system, for the gasification finish of phosphorus provides condition, form following continuous biochemical reaction:
The absorption of phosphorus:
ADP+H
3pO
4+ energy → ATP+H
2o (aerobic environment)
The release of phosphorus:
ATP+H
2o → ADP+H
3pO
4+ energy (anaerobic environment)
The gasification of phosphorus transforms:
H
3pO
4+ phosphoric acid salt reducing bacteria → phosphuret-(t)ed hydrogen (anaerobic environment)
C) conversion of phosphuret-(t)ed hydrogen
Pipeline access sludge sump stirring for phosphuret-(t)ed hydrogen in the air reservoir that step b) is obtained, phosphuret-(t)ed hydrogen is easy to be adsorbed on mud granule, form matrix-bound phosphine MBP, add again adsorption by soil agent, height absorption storage by phosphuret-(t)ed hydrogen in adsorption by soil agent, is administered in soil, and the phosphuret-(t)ed hydrogen in adsorption by soil agent will change the reactive phosphate easily being absorbed by farm crop into, be phosphate fertilizer, the soil existing with invalid form for phosphorus shortage soil or phosphorus; Described in it, adsorption by soil agent is made up of 88% oxygenant, 7% raising agent, 1% sorbent material, 2% anti-hard caking agent, 2% dispersion agent by mass percentage; Described oxygenant is potassium permanganate; Described raising agent is wood chip or white carbon black; Described anti-hard caking agent is Graphite Powder 99; Described dispersion agent is silicon-dioxide and flyash;
The recovery of d) purifying waste water
The supernatant liquor that step b) is obtained is sent into sterilization pool through pipeline, through short mix method cholorination, i.e. and clorox or chlorinated lime or chlorine tablets sterilization, postprecipitation 1 hour, essence filter, removes the residual impurity in water, obtains processing purifying waste water of reclaiming.
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| CN105923749A (en) * | 2015-09-01 | 2016-09-07 | 江西金达莱环保股份有限公司 | Gasification dephosphorization sewage treatment method and system |
| CN105502658B (en) * | 2016-01-07 | 2017-12-29 | 沈阳建筑大学 | And oxygen Flat Membrane gasification dephosphorization apparatus and its method |
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