CN107285290A - A kind of method that utilization light burnt powder Removal of Phosphorus in Wastewater reclaims phosphorus - Google Patents

A kind of method that utilization light burnt powder Removal of Phosphorus in Wastewater reclaims phosphorus Download PDF

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Publication number
CN107285290A
CN107285290A CN201710584413.2A CN201710584413A CN107285290A CN 107285290 A CN107285290 A CN 107285290A CN 201710584413 A CN201710584413 A CN 201710584413A CN 107285290 A CN107285290 A CN 107285290A
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China
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phosphorus
light burnt
burnt powder
wastewater
utilization
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CN201710584413.2A
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Chinese (zh)
Inventor
刘桂萍
刘长风
毕颖
唐蕊
王俊凯
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Shenyang University of Chemical Technology
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Shenyang University of Chemical Technology
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Priority to CN201710584413.2A priority Critical patent/CN107285290A/en
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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/26—Phosphates
    • C01B25/32—Phosphates of magnesium, calcium, strontium, or barium
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/26—Phosphates
    • C01B25/45—Phosphates containing plural metal, or metal and ammonium
    • C01B25/451—Phosphates containing plural metal, or metal and ammonium containing metal and ammonium
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5263—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using natural chemical compounds
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05B—PHOSPHATIC FERTILISERS
    • C05B17/00—Other phosphatic fertilisers, e.g. soft rock phosphates, bone meal
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05B—PHOSPHATIC FERTILISERS
    • C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • C05G3/80—Soil conditioners
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/105—Phosphorus compounds

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Pest Control & Pesticides (AREA)
  • Soil Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

A kind of method that utilization light burnt powder Removal of Phosphorus in Wastewater reclaims phosphorus, is related to a kind of method for reclaiming phosphorus, and the light burnt powder of the invention obtained using low-grade magnesite by calcining is added it in phosphorus-containing wastewater as raw material, reaction is stirred at normal temperatures and pressures.The quality of light burnt powder（With magnesia gauge）Mass ratio with Phosphorus From Wastewater is 15 ~ 25：1, pH value is controlled between 8.0 ~ 10, mixing speed is 150r ~ 200r/min, mixing time is 20min ~ 30min, settle 30min ~ 60min, the clearance of phosphorus in waste water can reach more than 95%, gained sediment dry after can as crops base manure or base fertilizer, provide the nutrients such as phosphorus, magnesium for crops.

Description

A kind of method that utilization light burnt powder Removal of Phosphorus in Wastewater reclaims phosphorus
Technical field
It is more particularly to a kind of to reclaim phosphorus using light burnt powder Removal of Phosphorus in Wastewater the present invention relates to a kind of method for reclaiming phosphorus Method.
Background technology
Light burnt powder is that, using magnesite as raw material, fine grinding is formed after roasting, its abundant raw material, steady quality.And China is generation Magnesite resource the abundantest country in boundary.Total 3,000,000,000 tons of reserves ore, accounts for the 2/3 of world's total amount.What China was verified The province of magnesite ore reserves has 9, but main integrated distribution, in Liaoning and the province of Shandong two, wherein Liaoning possesses reserves 68478.5 Ten thousand tons, the 87.33% of national total amount is accounted for, Shandong possesses 8875.9 ten thousand tons of reserves, accounts for the 11.32% of national total amount.Current state-owned ore deposit Mountain utilizes high-quality lump ore mostly, produces the products such as magnesia, high purity magnesium, basic to ore deposit outside two, three-level and level and the fine ore of extraction Do not utilize, magnesite utilization rate only reaches 30%~40%.Due to lacking advanced practical purification by mineral technology, while by economy Rich ore is usually only adopted in recovery process by the influence of factor, the mining firm of domestic magnesite（Containing MgO >=47% superfine and One-level giobertite, price 190-130 members per ton）, and the magnesite less than 45%（Two grades and three-level ore deposit, giobertite only 20 Yuan/ton）After extraction, because price is less than cost of transportation, so largely being discarded, arbitrarily takes up an area and stack, take a large amount of farmlands, and shape Into white pollution.Heavy damage ecological environment, causes the serious waste and ecology of a large amount of poor values and land resource The continuous deterioration of environment.Therefore, the comprehensive utilization of low-grade magnesite has turned into China mine environmental problem urgently to be resolved hurrily.
Phosphorus is to cause the key factor of body eutrophication, so tackling increasingly serious global eutrophication problem During, focus on the control to phosphorus first.Excessively paradoxically available phosphate rock resource is very short a few days ago with phosphorus in water body. On the one hand phosphorus be again on the one hand most valuable mineral resources, if can be by water body as the key factor for causing eutrophication Middle excessive phosphorus ligands and being reclaimed using certain form are used as resource just can be while solve the two problems, and can be with Greatly reduce the cost of agricultural production.Therefore, the highest goal of waste water dephosphorization is exactly to realize the different links from sewage disposal Reclaim phosphor resource and re-use.In treatment of Phosphorus Containing Waste Water technology, people employ various techniques and carry out dephosphorization, main to include life Thing method, chemical precipitation method, absorption method, the integrated use from exchange process etc. and these methods.All dephosphorization techniques are all Using the conversion and cycle process of phosphorus, the phosphorus in waste water is set to be converted into insoluble calcium phosphate precipitation, or make using crystallization and absorption With, or using cell synthesize the process in sludge cell of being absorbed to phosphorus, then again by the separation means such as precipitation, filtering by this A little solids are separated with water body, so that phosphorus be removed from sewage.In addition, the Peking University professor Lu Anhuai also once proposition of originality The 4th class method for governing pollution-mineral method after Physical, chemical method and bioanalysis.It is exactly to be imitated using the surface of mineral Should, Hole bottom cavity blast, structure effect, ion exchange effect, crystallization effect, solubility effect, hydration effect, redox effect, half The effects such as the biological interaction of conductor effect, nano effect and mineral remove pollutant.Such as Lin Jianwei《Calcite is gone in water removal Phosphatic Study on influencing factors》（Chinese water supply and drainage, 2006,22 (15): 67 -70 ）, Zhu Maoxu etc.《Hydrotalcite and Absorption of its product of roasting to phosphate radical》（Mineral journal, 2005,25（1）: 27-32）Mineral dephosphorization is utilized etc. reporting Method, but the method that obtained light burnt powder reclaims phosphorus as adsorption precipitant Removal of Phosphorus in Wastewater is calcined by the use of low-grade magnesite There is not been reported.
The content of the invention
It is an object of the invention to provide a kind of method that utilization light burnt powder Removal of Phosphorus in Wastewater reclaims phosphorus, this method is with low The light burnt powder that grade magnesite is obtained by calcining is raw material, adds it in phosphorus-containing wastewater, is stirred at normal temperatures and pressures Mix reaction.The clearance of phosphorus in waste water can reach more than 95%, base manure or bottom that gained sediment can be as crops after drying Fertilizer, the nutrients such as phosphorus, magnesium are provided for crops.
The purpose of the present invention is achieved through the following technical solutions：
A kind of method that utilization light burnt powder Removal of Phosphorus in Wastewater reclaims phosphorus, methods described includes procedure below：
The light burnt powder obtained using low-grade magnesite by calcining is added it in phosphorus-containing wastewater, in normal temperature and pressure as raw material Under be stirred reaction.The quality of light burnt powder（With magnesia gauge）Mass ratio with Phosphorus From Wastewater is 15 ~ 25：1, pH value control Between 8.0 ~ 10, mixing speed is 150r ~ 200r/min, and mixing time is 20min ~ 30min, settles 30min ~ 60min, institute After drying precipitate can as crops base manure or base fertilizer.
The method that a kind of described utilization light burnt powder Removal of Phosphorus in Wastewater reclaims phosphorus, the light burnt powder is that Liaoning production is low-grade Light magnesium oxide powder, its content of MgO is between 60% ~ 90%.
The method that a kind of described utilization light burnt powder Removal of Phosphorus in Wastewater reclaims phosphorus, the initial pH value of the waste water 6 with The pH value of reaction system need not be then adjusted when lower.
This method can both handle the phosphorus-containing wastewater of low concentration, can also handle the phosphorus-containing wastewater of high concentration, gained precipitation Thing contains the phosphate such as magnesium monohydrogen phosphate, is relatively good phosphorus magnesium slow release fertilizer, can as crops base manure or base fertilizer, or be used as Modifying agent of acid soil etc..If simultaneously can be while denitrogenation dephosphorizing, forms phosphoric acid ammonium magnesium precipitate containing ammonia nitrogen in waste water High-quality slow-release fertilizer.
Advantages of the present invention is with effect：
Material source of the present invention is in natural low-grade magnesite, and storage is enriched, with low cost, that is, solves low-grade magnesite Problem of complex utilization, outlet is provided for its rational exploitation, can reclaim again the phosphorus in waste water be subject to as phosphorus, fertiliser containing magnesium it is comprehensive Close and utilize, with higher economic benefit and environmental benefit.
The present invention is used for the raw material sources for removing Phosphorus From Wastewater in natural low-grade magnesite, and storage is enriched, and cost is low It is honest and clean.The problem of complex utilization of low-grade magnesite is solved, outlet is provided for its rational exploitation, with preferable warp Benefit of helping and environmental benefit.
The method of the present invention has preferable treatment effect to low concentration and high-concentration phosphorus-containing wastewater, in optimal treatment condition The clearance of lower phosphorus can reach more than 95%, available for sanitary sewage, breeding wastewater, industrial phosphorus-containing waste water processing.
Light burnt powder used does not contain other heavy metals in addition to containing the element such as a large amount of magnesium and a small amount of silicon, calcium, iron, aluminium, place Manage phosphorus-containing wastewater to reclaim after phosphorus or handle after nitrogenous phosphorus-containing wastewater recovery nitrogen phosphorus, obtain phosphorous, magnesium elements or nitrogenous, phosphorus, magnesium The agricultural fertilizer of element.The treatment of wastes with processes of wastes against one another, contamination control and changing rejected material to useful resource are realized parallel, with " zero-emission " and " zero is useless The environment protection significance of material ".
Brief description of the drawings
Fig. 1 is 65% and 89% light burnt powder dephosphorization sediment microphotograph；
Fig. 2 is influence figure of the pH value to 65% and 89% light burnt powder phosphor-removing effect；
Fig. 3 is influence figure of the dosage to 65% and 89% light burnt powder phosphor-removing effect；
Fig. 4 is influence figure of the mixing time to 65% and 89% light burnt powder phosphor-removing effect.
Embodiment
With reference to embodiment, the present invention is described in detail.
Light burnt powder raw material sources used in following examples and composition explanation：
Light burnt powder specification used is content of magnesia 65% and 89% two kind, is taken from Haicheng magnesite.Its chemical composition It see the table below：
65% light burnt powder chemical composition：
Chemical composition MgO SiO2 Fe2O3 CaO Al2O3 Loss on ignition
Content % 64.85 3.92 0.32 1.60 0.36 28.95
89% light burnt powder chemical composition：
Chemical composition MgO SiO2 Fe2O3 CaO Al2O3 Loss on ignition
Content % 89.00 3.84 0.54 1.98 1.13 4.51
Embodiment 1
Take 12 parts of the phosphorous simulated wastewater that 100mL concentration is 300mg/L respectively in 12 large beakers, wastewater pH is adjusted, wherein 6 Every part of part adds 65% light burnt powder 1g, the light burnt powder 0.8g of another 6 parts of every part of additions 89%, is stirred with 150r/min mixing speed 25min, settles 30min；Take supernatant to survey phosphorus content, calculate tp removal rate, while taking precipitation to observe sediment under the microscope Form, as a result see the table below and accompanying drawing.
65% light burnt powder dephosphorization result
Sequence number PH before experiment PH after experiment P clearances/%
1 2 8 98.72
2 2 8 99.27
3 4 9 99.72
4 4 9 99.69
5 6 10 99.17
6 6 10 99.39
Average 99.32
89% light burnt powder dephosphorization result
Sequence number PH before experiment PH after experiment P clearances/%
1 2 8 98.96
2 2 8 99.27
3 3 9 99.51
4 3 9 99.63
5 6 10 94.13
6 6 10 96.33
Average 97.97
Embodiment 2
Take 10 parts of the phosphorous simulated wastewater that 100mL concentration is 100mg/L respectively in 10 large beakers, regulation pH is 2, with 150r/min mixing speed stirring 20min, settles 30min；Take supernatant to survey phosphorus content, calculate tp removal rate, as a result see below Table.
65% light burnt powder dephosphorization result
Dosage/g PH before experiment PH after experiment Clearance/%
0.1 6 7 28.73
0.2 6 8 60.14
0.3 6 9 77.61
0.4 6 9 93.10
0.5 6 10 95.63
89% light burnt powder dephosphorization result
Dosage/g PH before experiment PH after experiment Clearance/%
0.1 6 8 55.63
0.2 6 8 72.82
0.3 6 8 81.41
0.4 6 9 90.14
0.5 6 10 94.93
Embodiment 3
Take 10 parts of the phosphorous simulated wastewater that 100mL concentration is 1500mg/L respectively in 10 large beakers, regulation pH is 2, with 150r/min mixing speed stirring 20min, settles 30min；Take supernatant to survey phosphorus content, calculate tp removal rate, as a result see below Table.
65% light burnt powder dephosphorization result
Dosage/g PH before experiment PH after experiment P clearances/%
0.1 2 5 10.77
0.5 2 7 74.64
1 2 8 91.57
1.5 2 8 90.88
2 2 8 95.23
2.5 2 9 95.85
3 2 9 94.78
4 2 9 97.39
5 2 10 99.45
6 2 10 99.92
7 2 10 99.96
89% light burnt powder dephosphorization result
Dosage/g PH before experiment PH after experiment P clearances/%
0.1 2 6 21.17
0.3 2 6 42.35
0.5 2 7 56.95
0.7 2 7 71.68
0.9 2 8 83.66
1.2 2 8 92.13
3 2 9 96.38
4 2 9 99.05
5 2 10 99.60
6 2 10 99.86
7 2 10 99.85

Claims (3)

1. a kind of method that utilization light burnt powder Removal of Phosphorus in Wastewater reclaims phosphorus, it is characterised in that methods described includes procedure below：
The light burnt powder obtained using low-grade magnesite by calcining is added it in phosphorus-containing wastewater, in normal temperature and pressure as raw material Under be stirred reaction；
The quality of light burnt powder（With magnesia gauge）Mass ratio with Phosphorus From Wastewater is 15 ~ 25：1, pH value control 8.0 ~ 10 it Between, mixing speed is 150r ~ 200r/min, and mixing time is 20min ~ 30min, settles 30min ~ 60min, and gained sediment is done After dry can as crops base manure or base fertilizer.
2. the method that a kind of utilization light burnt powder Removal of Phosphorus in Wastewater according to claim 1 reclaims phosphorus, it is characterised in that institute State light burnt powder and produce low-grade light magnesium oxide powder for Liaoning, its content of MgO is between 60% ~ 90%.
3. the method that a kind of utilization light burnt powder Removal of Phosphorus in Wastewater according to claim 1 reclaims phosphorus, it is characterised in that institute The pH value of reaction system need not be then adjusted when stating the initial pH value of waste water below 6.
CN201710584413.2A 2017-07-18 2017-07-18 A kind of method that utilization light burnt powder Removal of Phosphorus in Wastewater reclaims phosphorus Pending CN107285290A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111302845A (en) * 2019-07-09 2020-06-19 深圳前海大地矿物科技有限公司 Nitrogen phosphorus potassium full slow release fertilizer and its production and application method

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Publication number Priority date Publication date Assignee Title
CN102942237A (en) * 2012-11-15 2013-02-27 天津市鑫昌科技有限公司 Preparation method for water purifier capable of synchronously removing ammonia nitrogen and phosphorus in waste water
CN105771881A (en) * 2016-04-12 2016-07-20 合肥工业大学 Material and method for removing phosphorus in water

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102942237A (en) * 2012-11-15 2013-02-27 天津市鑫昌科技有限公司 Preparation method for water purifier capable of synchronously removing ammonia nitrogen and phosphorus in waste water
CN105771881A (en) * 2016-04-12 2016-07-20 合肥工业大学 Material and method for removing phosphorus in water

Non-Patent Citations (2)

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Title
李欣欣: "轻烧粉处理含氮磷废水的研究", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 *
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111302845A (en) * 2019-07-09 2020-06-19 深圳前海大地矿物科技有限公司 Nitrogen phosphorus potassium full slow release fertilizer and its production and application method

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