CN100413789C - Compound filling for sewage treatment - Google Patents

Compound filling for sewage treatment Download PDF

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Publication number
CN100413789C
CN100413789C CNB2004100424170A CN200410042417A CN100413789C CN 100413789 C CN100413789 C CN 100413789C CN B2004100424170 A CNB2004100424170 A CN B2004100424170A CN 200410042417 A CN200410042417 A CN 200410042417A CN 100413789 C CN100413789 C CN 100413789C
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CN
China
Prior art keywords
medical stone
unslaked lime
compounded mix
water
sewage disposal
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Expired - Fee Related
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CNB2004100424170A
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CN1699214A (en
Inventor
李文奇
胡朝华
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China Institute of Water Resources and Hydropower Research
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China Institute of Water Resources and Hydropower Research
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Priority to CNB2004100424170A priority Critical patent/CN100413789C/en
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Publication of CN100413789C publication Critical patent/CN100413789C/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Abstract

The present invention discloses a sewage treatment composite filler which mainly comprises the components of the following parts by weight: 3 to 12 of maifanite, 2 to 18 of quicklime, 1 to 3 of industrial adhesive and 1 to 3 of pore forming agent. The present invention also discloses a preparation method for the sewage treatment composite filler. Because the composite filler of the present invention has the advantages of small volume weight, large specific surface area, large porosity, high mechanical strength and shock load resistance, and particularly when sewage treatment is carried out, the composite filler has specificity for nitrogen and phosphorus adsorption, and can not bring about secondary pollution, the composite filler has significant practical application value.

Description

Sewage disposal compounded mix and preparation method
Technical field
The present invention relates to the filler and the preparation method of the relevant sewage disposal in environmental protection field, relate in particular to a kind of compounded mix and preparation method of sewage disposal.
Background technology
China belongs to one of 13 poor-water countries in the world, and water resources occupancy volume per person only is world occupancy volume per person's 1/4.Inhomogeneous on deficiency on the gross amount of water resources and the spatial distribution seriously restricted China's rapid development of economy.Along with the continuous development of urbanization, China has occurred Water resources development within the border excessively and the situation of being negligent of protecting, and makes water resource environment worsen day by day.Have every year several hundred million ton without any processing or through simple process but the sewage discharge that does not reach discharging standards in the lake, river, river and lake water quality descends rapidly, the Freshwater resources critical shortage.Only national total amount of sewage discharge in 2002 is up to 439.5 hundred million tons, the COD total emission volumn is 1366.9 ten thousand tons, the ammonia nitrogen total emission volumn is 128.8 ten thousand tons, and wherein the town domestic sewage total emission volumn is 232.3 ten thousand tons, and the town domestic sewage processing rate only is 22.3% of a total emission volumn." have water all dirty ", " have river all dried " have become the real picture of some areas water resource environments.
Environmental protection industry is the 21 century new growth engines, is global industry of Future Society.The Environmental Protection in China industry is started late, and big gap is arranged compared with developed countries, and the development and application for green technology does not at present also take much count of.Although Environmental Protection in China enterprise strengthens the production of important environmentfriendly products, gordian techniquies such as the character of environmentfriendly products, function and structure are not mature enough.China starts from after the foundation for the research of sewage disposal technology and widespread use, present most urban wastewater treatment firm adopts traditional activated sludge process, but along with improving constantly of living standards of the people, traditional activated sludge process can not satisfy the requirement of people to denitrogenation dephosphorizing in the sewage.
BAF is a kind of new and effective sewage disposal technology.Abroad, this technology is considered to one of state-of-the-art sewage disposal technology, has been widely applied in the processing of all kinds of sewage.And the fine or not key of BAF treatment effect is filler selection and use, it requires filler to have advantages such as porousness (promptly having bigger specific surface area), strong adsorptivity, when sewage passes through packing layer, sewage is played certain cleaning action by physical adsorption.During BAF will feed water in conventional rapid filter and the sewage biomembranous advantage roll into one, the filling surface growth has microbial film in the operational process, during the effluent stream filter bed, filtrate adsorbs a large amount of suspended impurities and part organic pollutant, makes organic pollutant carry out aerobic oxidation at biofilm surface by the aerating apparatus oxygen supply simultaneously.
Biofilm carrier (biologic packing material) is the core of this sewage disposal technology, and it directly affects treatment effect, oxygenation capacity, initial cost, the cycle of operation and expense.Mainly contain combination biologic packing material, 3 D elastic filler, fibrous packing, multiaspect hollow ball, suspension ball etc. at present.But, be difficult to reach emission standard because various filler materials and structure are single, relatively poor to the denitrogenation dephosphorizing effect in actual applications.
In the existing sewage disposal filler the more successful example of the removal of nitrogen is had zeolite filler, its porosity height, specific surface area are big, and ammonia nitrogen is had stronger ion-exchange capacity, and still, zeolite filler is very little to the removal effect of phosphorus.Therefore, provide a kind of nitrogen, the phosphorus that can remove simultaneously in the sewage, and removal effect is good, the filler of stable effluent quality, has important practical significance.
Summary of the invention
In order to address the above problem, the invention provides a kind of compounded mix that is used for sewage disposal, it is that the inventor takes all factors into consideration various packing properties and develops, nitrogen, phosphorus absorption had specificity, clearance height, non-secondary pollution, raw material sources are abundant, and are cheap.
The technical scheme of sewage disposal compounded mix of the present invention is as follows:
Filler of the present invention mainly contains the component of following parts by weight: medical stone 3～12, unslaked lime 2～18, industry adhesive 1～3.
The another kind of technical scheme of sewage disposal compounded mix of the present invention is as follows:
Filler of the present invention mainly contains the component of following parts by weight: medical stone 3～12, unslaked lime 2～18, industry adhesive 1～3, pore-forming material 1～3.
The contained essential mineral of medical stone comprises potassium felspar sand and plagioclase, and less important mineral comprise white mica, biotite and hornblende etc.Wherein potassium felspar sand accounts for 40～50%, plagioclase accounts for about 30%.Mainly be potash feldspar and little feldspar in the potassium felspar sand, be hypidiomorphic granular, can be divided into two kinds of grades, big person is in 1.5～5mm scope, and little person is about 0.1mm, and the potassium felspar sand major part surrounds the plagioclase better than its euhedral degree; Being the oligoclase mostly in the plagioclase, is andesine on a small quantity, and it is tabular or granular to be subhedral, general 0.13～0.6mm.
Medical stone rock major ingredient and average content value thereof are: SiO 272.12%, Al 2O 313.93%, Fe 2O 31.29%, TiO 20.24%, CaO1.03%, K 2O4.89%, Na 2O3.33% belongs to aluminium supersaturation type.Medical stone also contains multiple natural trace element, can be used as the human nutrition source, wherein most of trace element can be water-soluble, and a small amount of harmful element content that the medical stone of various granularities can stripping is very little, well below national Drinking Water matter standard.
Feldspar mineral in the medical stone are because weathering and alteration generation sericitization and kaolinization, make its crystal face present vesicular, multilayer spination profile is split or peeled off into to the feldspar mineral generally also along cleavage surface, increased the contact area with water, and kaolinite itself just has the very strong ion-exchange performance that echos.Medical stone is configured to the basis with silicon-oxygen tetrahedron, and the silicon in vertical oxygen of tetrahedron and the adjacent tetrahedron is key altogether, and combines with the ionic linkage form with K, Na, Ca plasma.When medical stone places water, a large amount of disassociations [SiO] -Group, this charged [SiO] -Group and water intermediate ion generation permutoid reaction.
Unslaked lime in this kind filler can improve pH value and Ca 2+Concentration makes PO 4 3-With Ca 2+In conjunction with generating Ca 3(PO 4) 2Reach the purpose of removing phosphorus.Required unslaked lime wide material sources can directly obtain from market, also can adopt the method for limestone calcination to obtain.
Pore-forming material commonly used has paraffin, low-diet salt etc., also can adopt big material such as the porosity that adds ashes own as pore-forming material.
The common used in industry tackiness agent has cement, water glass etc.Preferably adopt cement as industry adhesive among the present invention, not only cheap, and also the physical strength of cement after processing is big, and anti-portative power is strong.
The preparation method of sewage disposal compounded mix of the present invention, it may further comprise the steps:
(1) medical stone with described ratio of weight and number simply is processed into particulate state, and tackiness agent is processed into granular or powdery, simultaneously unslaked lime mixing in water is soaked for some time (being generally 1～10 day);
(2) with above-mentioned medical stone, unslaked lime and tackiness agent mixing, add less water and constantly stirring, by craft or mechanical workout granulation, form coarse bead-type substrate, be the water treatment compounded mix.
When sewage disposal compounded mix of the present invention comprised pore-forming material, its preparation method may further comprise the steps:
(1) medical stone, the pore-forming material with described ratio of weight and number simply is processed into particulate state, and tackiness agent is processed into granular or powdery, simultaneously unslaked lime mixing in water soaked for some time (being generally 1～10 day);
(2) with medical stone, unslaked lime, pore-forming material and tackiness agent mixing, add less water and constantly stirring, by craft or mechanical workout granulation, form coarse bead-type substrate, be the water treatment compounded mix.
In the said process, unslaked lime in water, fully soak and reach capacity after can be so that granulation process be easy.Unslaked lime also can soak in sodium carbonate solution.
In order to reach better effect, the particle diameter of medical stone and pore-forming material can be controlled between 0.1～1cm, be generally 0.5cm.
Can obtain a kind of bead-type substrate of rough porous according to above-mentioned preparation method, carrier particle diameter of the present invention is that 0.5～5cm, grain heavily are 10～100g.
Compounded mix of the present invention is owing to added pore-forming material, compare with existing filler, its unit weight is little, specific surface area is big, porosity is big, and the use of binding agent, the physical strength and the anti impulsion load of compounded mix integral body have been strengthened, especially when carrying out sewage disposal, absorption has specificity to filler of the present invention to nitrogen phosphorus.Adopt the main component of medical stone, have advantage with low cost, and can not cause secondary pollution as filler.Adopt filler of the present invention, make the entire operation process simplification, but life-time service, and convenient management has important application value.
Further describe sewage disposal compounded mix of the present invention and preparation method thereof by following examples, Comparative Examples and test example, but do not limit protection scope of the present invention with this.
Embodiment
The preparation of embodiment 1, sewage disposal compounded mix I of the present invention
Raw material: natural medical stone, common model unslaked lime, common model powdered cement, its weight ratio is 6: 9: 2.
Medical stone simply is processed into particle, and median size is about 0.5cm.Unslaked lime is added the water mixing in advance, make it be complete state of saturation, continue to soak 3 days; Then with medical stone, unslaked lime and cement mixing, add less water and stirring and evenly mixing after, by manual (or machinery) processing granulation, form coarse bead-type substrate rapidly, be sewage disposal compounded mix of the present invention.After testing, its median size is approximately 3cm, grain heavily for 30g.
The preparation of embodiment 2, sewage disposal compounded mix II of the present invention
Raw material: natural medical stone, common model unslaked lime, common model powdered cement, ashes, its ratio of weight and number is 6: 9: 2: 1.
It is particle about 0.2cm that medical stone and ashes are processed into particle diameter, and unslaked lime adds in advance and continues to soak 4 days after the water mixing makes it be complete state of saturation; Then with medical stone, ashes, unslaked lime and cement mixing, add less water and stirring and evenly mixing after, by craft or mechanical workout granulation, form coarse bead-type substrate, be sewage disposal compounded mix of the present invention.After testing, its median size is approximately 3cm, grain heavily for 35g.
The preparation of embodiment 3, sewage disposal compounded mix III of the present invention
Raw material: natural medical stone, common model unslaked lime, common model powdered cement, paraffin, its ratio of weight and number is 5: 8: 2: 2.
The medical stone simple process is become particle, and median size is about 0.5cm, and unslaked lime adds the entry mixing to be it to continue after complete state of saturation to soak 7 days, add heated paraffin its dissolving is in a liquid state; Then with medical stone, paraffin, unslaked lime and cement mixing, add less water and stirring and evenly mixing after, by craft or mechanical workout granulation, form coarse bead-type substrate rapidly, be sewage disposal compounded mix of the present invention.After testing, its median size is approximately 3cm, grain heavily for 35g.
The preparation of embodiment 4, sewage disposal compounded mix IV of the present invention
Raw material: natural medical stone, common model unslaked lime, common model powdered cement, low-diet salt, its ratio of weight and number is 7: 10: 3: 3.
Medical stone is become particle with low-diet salt simple process, and particle diameter is between 0.2cm, and unslaked lime adds the water mixing in advance to be made and continue after its complete state of saturation to soak 5 days; Then with medical stone, low-diet salt, unslaked lime and cement mixing, add less water and stirring and evenly mixing after, by craft or mechanical workout granulation, form coarse bead-type substrate, be sewage disposal compounded mix of the present invention.After testing, its median size is approximately 1.5cm, grain heavily for 20g.
Comparative Examples 1: the preparation of limestone filler
Raw material: natural limestone
Wingdale soaked in water 2 days before the processing, by mechanical disintegration, and the processing granulating, particle diameter 0.5cm is directly as the sewage disposal filler.
Comparative Examples 2: the preparation of medical stone filler
Raw material: natural medical stone
Medical stone soaked in water 2 days before the processing, by mechanical disintegration, and the processing granulating, particle diameter 0.5cm is directly as filler.
Comparative Examples 3: the preparation of zeolite filler
Raw material: natural zeolite
Zeolite soaked in water 2 days before the processing, by mechanical disintegration, and the processing granulating, particle diameter 0.5cm is directly as filler.
The effect of test example 1, sewage disposal compounded mix of the present invention sewage disposal
With among the embodiment 1 preparation filler I and embodiment 2 in the preparation filler II in simulated sewage, carry out sewage disposal after, detect its assimilation effect to the nitrogen phosphoric.
The preparation of simulated sewage:
Be the variation of nitrogen concentration in the simulated sewage, with ammonium chloride (NH 4Cl)), SODIUM PHOSPHATE, MONOBASIC (NaH 2PO 4) and distilled water, be configured to the NH of different concns gradient 4 +-N and PO 4 3+-P equilibrium water solution.NH in the simulated sewage 4 +-N concentration range between 5～100mg/L, PO 4 3+The concentration range of-P is between 1.0～40mg/L.
Sewage treatment process:
The filler I of embodiment 1 preparation is tiled in 60 * 40 * 50m 3Bottom of gullet, simulated sewage can be 1: 0.05～1: 0.6 simulated sewage of packing in tank by water and filler weight ratio, carries out this experiment under the indoor static condition.Gathered water sample, and measured NH in the water with Na Shi colorimetry and molybdenum antimony resistance colorimetric method respectively in the 0th, 6,12,24,36,48,72 hour after the experiment beginning 4 +-N and PO 4 3+-P concentration.Equally, filler II is also carried out identical test.Filler I of the present invention and filler II be to the experimental data of the removal effect of nitrogen, phosphorus in the simulated sewage, sees Table 1 and table 2 respectively.
Table 1, filler I are to the dynamic removal effect of nitrogen, phosphorus in the simulated sewage
Sampling time (h) N loading capacity (mg/Kg) N clearance (%) P loading capacity (mg/Kg) P clearance (%)
2 153.20 11.83 0.97 4.98
6 160.33 15.49 18.71 37.29
12 229.10 50.75 30.78 59.28
24 281.59 77.66 42.44 80.50
48 301.02 87.62 44.64 84.51
72 - - 48.63 91.78
Table 2, filler II are to the dynamic removal effect of nitrogen, phosphorus in the simulated sewage
Sampling time (h) N loading capacity (mg/Kg) N clearance (%) P loading capacity (mg/Kg) P clearance (%)
2 29.84 9.18 2.77 5.21
6 58.50 17.99 3.59 6.76
12 147.53 45.37 13.54 25.48
24 193.09 59.38 30.85 58.04
48 233.20 71.72 46.62 87.73
72 - - 47.27 88.94
Data show: filler I of the present invention and II have obvious processing result simultaneously to ammonia nitrogen in the sewage and phosphoric acid salt.Filler I to ammonia nitrogen and phosphatic clearance respectively up to 87.6% and 91.78%, filler II to ammonia nitrogen and phosphatic clearance respectively up to 77.7% and 88.9%.
The filler of test example 2, Comparative Examples 1～3 preparation and filler of the present invention are to nitrogen phosphorus removal effect
The filler III that obtains among resulting filler and the embodiment 3 in the above-mentioned Comparative Examples 1～3 is handled simulated sewage according to the method in the test example 1, under the indoor static condition, experimentize.Gathered water sample, and measured NH in the water with Na Shi colorimetry and molybdenum antimony resistance colorimetric method respectively in the 0th, 6,12,24,36,48,72 hour after the experiment beginning 4 +-N and PO 4 3+The concentration of-P.The result such as the table 3 of gained.
Table 3, different filler are to the removal effect of nitrogen, phosphorus in the simulated sewage
Filler Nitrogen loading capacity (mg/kg) Phosphorus loading capacity (mg/kg) Ammonia-state nitrogen clearance (%) Phosphoric acid salt clearance (%)
Comparative Examples 1 15.65 34.85 16.3 20.5
Comparative Examples 2 23.91 10.78 21.3 16.8
Comparative Examples 3 74.99 12.62 59.0 34.9
Embodiment 3 70.06 176.32 56.8 94.5
Data show: single filler, no matter be Wingdale, medical stone or zeolite, to ammonia nitrogen in the sewage and the too late far away compounded mix of the present invention of phosphatizing effect.Three kinds of single fillers are respectively Wingdale 16.3%, medical stone 21.3% and zeolite 59.0% to ammonia-N removal rate, are respectively Wingdale 20.3%, medical stone 16.3% and zeolite 34.9% to phosphatic clearance.And compounded mix of the present invention is 56.8%% to ammonia-N removal rate, is 94.5% to phosphatic clearance.

Claims (8)

1. a sewage disposal compounded mix is characterized in that, mainly contains the component of following parts by weight: medical stone 3～12, unslaked lime 6～18, industry adhesive 1～3.
2. a sewage disposal compounded mix is characterized in that, mainly contains the component of following parts by weight: medical stone 3～12, unslaked lime 6～18, industry adhesive 1～3, pore-forming material 1～3.
3. sewage disposal compounded mix according to claim 1 and 2 is characterized in that, described tackiness agent is a cement.
4. the preparation method of the described sewage disposal compounded mix of claim 1 is characterized in that, may further comprise the steps:
(1) medical stone with described ratio of weight and number simply is processed into particulate state, and tackiness agent is processed into granular or powdery, evenly reaches saturatedly with unslaked lime is mixed in water simultaneously, soaks;
(2) with above-mentioned medical stone, unslaked lime and tackiness agent mixing, add less water and constantly stirring, by craft or mechanical workout granulation, form coarse bead-type substrate, be the water treatment compounded mix.
5. the preparation method of the described sewage disposal compounded mix of claim 2 is characterized in that, may further comprise the steps:
(1) medical stone, the pore-forming material with described ratio of weight and number simply is processed into particulate state, and tackiness agent is processed into granular or powdery, and be simultaneously that unslaked lime is evenly mixed in water, soaks;
(2) with medical stone, unslaked lime, pore-forming material and tackiness agent mixing, add less water and constantly stirring, by craft or mechanical workout granulation, form coarse bead-type substrate, be the water treatment compounded mix.
6. preparation method according to claim 4 is characterized in that, the grain diameter of described medical stone is 0.1～1cm.
7. preparation method according to claim 5 is characterized in that, the grain diameter of described medical stone and pore-forming material is 0.1～1cm.
8. according to claim 4 or 5 described preparation methods, it is characterized in that the unslaked lime soak time is 1～10 day.
CNB2004100424170A 2004-05-18 2004-05-18 Compound filling for sewage treatment Expired - Fee Related CN100413789C (en)

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Families Citing this family (7)

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Publication number Priority date Publication date Assignee Title
CN101671152B (en) * 2009-09-17 2011-12-21 周芳蓉 Wet land filler of immobilized microorganism and preparation method thereof
CN102225860B (en) * 2011-05-06 2013-01-16 宁波市宣溢水处理设备有限公司 Rare-earth porcelain sand filter material ball for removing organic matters and preparation method thereof
CN105271463A (en) * 2015-11-20 2016-01-27 威海广阳环保科技有限公司 Efficient solid filter material used for sewage treatment and manufacturing method thereof
CN106587497A (en) * 2016-12-07 2017-04-26 河池市技术开发中心 Machining wastewater treatment system
CN107032481B (en) * 2017-05-02 2021-03-30 广东工业大学 Biofilm filler, preparation method thereof and biofilm reactor
CN110526327A (en) * 2019-09-05 2019-12-03 郑州大学 A kind of dephosphorization filler and preparation method thereof
CN112500189A (en) * 2020-12-21 2021-03-16 苏州中材非金属矿工业设计研究院有限公司 Artificial wetland filler and preparation method and application thereof

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