CN108383220A - A kind of method of sewage microalgae and synchronous nitrogen and phosphorus trapping recycling - Google Patents
A kind of method of sewage microalgae and synchronous nitrogen and phosphorus trapping recycling Download PDFInfo
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- CN108383220A CN108383220A CN201810131411.2A CN201810131411A CN108383220A CN 108383220 A CN108383220 A CN 108383220A CN 201810131411 A CN201810131411 A CN 201810131411A CN 108383220 A CN108383220 A CN 108383220A
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- microalgae
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- 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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- 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
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
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- Water Treatment By Sorption (AREA)
Abstract
The present invention relates to a kind of methods of microalgae trapping recycling synchronous with sewerage nitrogen and phosphor, specifically using clay, blast furnace granulated slag, magnesium chloride and alkali as raw material, optimization prepares basic active calcium and magnesium silicon composite A, when it is used for sewage microalgae separation and recovery, the precipitations such as guanite, hydroxyapatite and calcium silicates phosphorus can be generated by electrical neutralization and at a high ph with the nitrogen phosphorus in sewage, induce the efficient flocculating of microalgae, to realize that the synchronous trapping recycling to algae, nitrogen phosphorus in sewage, the algae nitrogen phosphorus precipitated product of recycling can be used as slow-release fertilizer or adsorption functional material after desiccation.The technology of the present invention is simple, and equipment requirement is few, operating cost is low, and recycling product resourceization value is high, has wide popularizing application prospect.
Description
Technical field
The present invention relates to a kind of methods of sewage microalgae and synchronous nitrogen and phosphorus trapping recycling, belong to technical field of sewage.
Background technology
Microalgae is that the unicellular or many cells most wide, a kind of form of most species is small, simple in structure are distributed on the earth
Phototroph holds the balance in energy conversion and carbon cycle.The 1950s Oswald etc. propose with algae be
Main body replaces the biosystem based on activated sludge in traditional wastewater processing, has established the base of algae sewage disposal technology
Plinth.In recent years, numerous studies have been carried out to the potentiality of algae purification sewage both at home and abroad, more and more results of study show profit
Pollutant therein has not only been purified with microalgae processing waste water, while the cost of microdisk electrode can be reduced, and microalgae enrichment
Grease can partial alternative fossil energy, the microalgae harvested can obtain certain economic benefit, to compensate in environmental improvement
Cost investment, to form benign cycle.
But since microalgae has individual small（Generally at 1 ~ 30 μm）, cell surface with negative electrical charge and concentration it is low
（Usually 0.5-3.0 g/L）The features such as, bring prodigious difficulty to the separation of algae water.Currently, the method applied to microalgae recovery
Mainly there are sedimentation, centrifugation, filtering, flotation and flocculence, in these methods, precipitation method efficiency is low, time-consuming；Filtration method is easily stifled
Plug needs to regularly replace filter membrane；Centrifugal process, floatation energy consumption are big, therefore, inexpensive, efficient microalgae separation and recovery method
There is still a need for further investigations.Compared with the collecting methods such as precipitation, centrifugation and flotation, flocculence has less energy consumption, equipment and its maintenance
Expense is low and easy to operate equal clear superiorities, is widely used in microalgae separation and recovery.However, traditional chemical flocculation and object
Although reason flocculation has preferable harvest efficiency, the former chemical floc remains the secondary pollution caused by environment, with
And the high energy consumption and equipment cost height of the latter does not meet the requirement of large-scale application.Therefore, research and development can be simultaneously from sewage
Middle recycling nitrogen phosphorus and microalgae pharmaceutical preparations, no matter from advanced treatment of wastewater, or from the point of view of the recycling angularly of frustule
All it is one of most suitable method.
Invention content
In view of the deficiencies of the prior art, the purpose of the present invention is to provide a kind of sewage microalgaes and synchronous nitrogen and phosphorus trapping recycling
Method.
To achieve the above object, the technical scheme is that：
A kind of method of sewage microalgae and synchronous nitrogen and phosphorus trapping recycling proposed by the present invention, is as follows：
（1）Dry, grinding and sieving by clay mineral and blast furnace granulated slag material, retain the processing product that grain size is not less than 100 mesh,
By the MgCl of clay and blast furnace granulated slag and a concentration of 1 ~ 5mol/L2Solution and 0.5 ~ 1mol/L lye according to mass volume ratio
（0.5~3）mg：（0.5~5）mg：(1~5)mL：The ratio of (0.5 ~ 3) mL mixes, and standing 8 ~ for 24 hours, after filtering under the conditions of 110 DEG C
Drying product under the conditions of 300 ~ 500 DEG C is roasted 1 ~ 4h, after being cooled to room temperature, is ground into the material not less than 200 mesh by drying
A；
（2）Step is used in the microalgae sewage for waiting for concentration and separation（1）It is 100 ~ 500mg/ according to dosage when resulting material A
(L) step is added in dosage（1）Obtained materials A first stirs 1 ~ 5min with 250rpm, then 10 are mixed slowly with 50rpm ~
Then 30min precipitates 0.5 ~ 2h, you can realize that, to the enriching and recovering synchronous with nitrogen phosphorus of microalgae in sewage, the algae nitrogen phosphorus of recycling is heavy
Shallow lake product can be used as slow-release fertilizer or adsorption functional material after desiccation.
In the present invention, step（1）Described in clay mineral material be kaolin, bentonite, diatomite, attapulgite or
Sepiolite any one or more of mixture.
In the present invention, step（1）Described in blast furnace granulated slag be derived from steel-making enterprise.
In the present invention, step（1）Described in lye be NaOH or KOH.
In the present invention, step（2）Described in microalgae be chlorella, scenedesmus, scenedesmus obliquus, Microcystis aeruginosa or pavlova viridis
Deng one or more mixing algae.
The principle of the present invention is：Using clay, blast furnace granulated slag, magnesium chloride and alkali as raw material, it is multiple that optimization prepares basic active calcium and magnesium
Condensation material A, sewage microalgae separation application in, can by electrical neutralization, and at a high ph the calcium and magnesium in material from
The substances such as son and silicic acid generate guanite with the nitrogen phosphorus in sewage（Formula 1）, hydroxyapatite（2）With the precipitations such as calcium silicates phosphorus, lure
The efficient flocculating for sending out microalgae, to realize the synchronous trapping recycling to algae, nitrogen phosphorus in sewage.
Mg2++HPO4 2-+NH4 ++OH-+6H2O=MgNH4PO4·6H2O+H2O（1）
10 Ca2++6 PO4 3-+2OH-=Ca10(PO4)6(OH)2（2）
Compared with prior art, the beneficial effects of the present invention are：
1. basic active calcium and magnesium silicon composite prepared by the technology of the present invention has the characteristics that preparation method is simply and cheap, can be simultaneously
Realize that the efficient immobilization to microalgae in sewage and nitrogen phosphorus recycles, using simplicity, operating cost is low, is suitable for large-scale application.
2. the compound clay material rich in microalgae and nitrogen phosphorus that the technology of the present invention recycles, can directly as slow-release fertilizer and
Adsorption functional material carries out recycling application, has good economy and environmental benefit.
Specific implementation mode
The invention will be further described for following embodiment.
Embodiment 1
（1）Bentonite and blast furnace granulated slag is dry, be ground up, sieved, retain grain size and be not less than 100 mesh, by they with it is a concentration of
The MgCl of 1.5mol/L2Solution and 1mol/L NaOH solution according to mass volume ratio 0.5Kg:0.5Kg:1L:The ratio of 0.5L
Example mixing stands 6h, is dried under the conditions of 110 DEG C after filtering, and drying product is roasted 3h under the conditions of 400 DEG C, is cooled to room temperature
Afterwards, it is ground into the material A not less than 200 mesh.
（2）In the present embodiment, in the beaker that volume is 1L, the chlorella sewage to be separated of 500mL is added（Chlorella 5
×109A/mL, NH4 +- N14.3mg/L, TP 4.4mg/L）, according to the dosage that dosage is 200mg/L, step is added（1）
The materials A arrived, 2min is stirred with 250rpm, is mixed slowly 10min with 50rpm, is precipitated 0.5h, measure chlorella, nitrogen and phosphorus
Removal rate difference 98.1%, 92.7% and 99.5%.
Embodiment 2
（1）Attapulgite and blast furnace granulated slag is dry, be ground up, sieved, retain grain size and be not less than 100 mesh, by they with it is a concentration of
The MgCl of 1mol/L2Solution and 0.5mol/L NaOH solution according to mass volume ratio 0.5Kg:1Kg:1.5L:The ratio of 0.5L
Example mixing stands 8h, is dried under the conditions of 110 DEG C after filtering, and drying product is roasted 4h under the conditions of 420 DEG C, is cooled to room temperature
Afterwards, it is ground into the material A not less than 200 mesh.
（2）In the present embodiment, in the beaker that volume is 1L, the scenedesmus sewage to be separated of 500mL is added（Scenedesmus
0.47mg/L, NH4 +- N11.6mg/L, TP 5.7mg/L）, according to the dosage that dosage is 300mg/L, step is added（1）It obtains
Materials A, 3min is stirred with 250rpm, 15min is mixed slowly with 50rpm, 0.5h is precipitated, measures the removal of scenedesmus, nitrogen and phosphorus
Rate difference 99.1%, 94.1% and 99.3%.
Embodiment 3
（1）Diatomite and blast furnace granulated slag is dry, be ground up, sieved, retain grain size and be not less than 100 mesh, by they with it is a concentration of
The MgCl of 2mol/L2Solution and 2mol/L NaOH solution according to mass volume ratio 1Kg:0.5Kg:1L:The ratio of 0.5L is mixed
It closes and stands 4h, dried under the conditions of 110 DEG C after filtering, drying product is roasted into 3h under the conditions of 440 DEG C, after being cooled to room temperature,
It is ground into the material A not less than 200 mesh.
（2）In the present embodiment, in the beaker that volume is 1L, the Microcystis aeruginosa sewage to be separated of 500mL is added（Microcystis aeruginosa
3×106A/mL, NH4 +- N17.3mg/L, TP 6.4mg/L）, according to the dosage that dosage is 250mg/L, step is added（1）
The materials A arrived, 2min is stirred with 250rpm, is mixed slowly 15min with 50rpm, is precipitated 1h, measure going for Microcystis aeruginosa, nitrogen and phosphorus
Except rate difference 97.1%, 93.7% and 99.6%.
Claims (5)
1. a kind of method of microalgae trapping recycling synchronous with sewerage nitrogen and phosphor, it is characterised in that be as follows：
（1）Dry, grinding and sieving by clay mineral and blast furnace granulated slag material, retain the processing product that grain size is not less than 100 mesh,
By the MgCl of they and a concentration of 1 ~ 5 mol/L2Solution and 0.5 ~ 1mol/L lye according to mass volume ratio (0.5 ~ 3)
mg：(0.5~5)mg：(1~5)mL：(ratio of (0.5 ~ 3) mL mixes, and standing 6 ~ for 24 hours, it is dried under the conditions of 110 DEG C after filtering,
Drying product is roasted into 1 ~ 4h under the conditions of 300 ~ 500 DEG C, after being cooled to room temperature, is ground into the material A not less than 200 mesh；
（2）Step is used in the microalgae sewage for waiting for concentration and separation（1）It is 100 ~ 500mg/ according to dosage when resulting material A
Step is added in the dosage of L（1）Obtained materials A first stirs 1 ~ 5min with 250rpm, then 10 are mixed slowly with 50rpm ~
Then 30min precipitates 0.5 ~ 2h, you can realize that, to the enriching and recovering synchronous with nitrogen phosphorus of microalgae in sewage, the algae nitrogen phosphorus of recycling is heavy
Shallow lake product can be used as slow-release fertilizer or adsorption functional material after desiccation.
2. a kind of microalgae according to claim 1 method for trapping recycling synchronous with sewerage nitrogen and phosphor, it is characterised in that step
（1）Described in clay mineral material be any one of kaolin, bentonite, diatomite, attapulgite or sepiolite or more
Kind mixture.
3. a kind of microalgae according to claim 1 method for trapping recycling synchronous with sewerage nitrogen and phosphor, it is characterised in that step
（1）Described in blast furnace granulated slag material be derived from steel-making enterprise.
4. a kind of microalgae according to claim 1 method for trapping recycling synchronous with sewerage nitrogen and phosphor, it is characterised in that step
（1）Described in lye be NaOH or KOH.
5. a kind of microalgae according to claim 1 method for trapping recycling synchronous with sewerage nitrogen and phosphor, it is characterised in that step
（2）Described in microalgae be chlorella, scenedesmus, scenedesmus obliquus, Microcystis aeruginosa or pavlova viridis one or more mixing it is light
Algae.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810131411.2A CN108383220A (en) | 2018-02-09 | 2018-02-09 | A kind of method of sewage microalgae and synchronous nitrogen and phosphorus trapping recycling |
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| CN201810131411.2A CN108383220A (en) | 2018-02-09 | 2018-02-09 | A kind of method of sewage microalgae and synchronous nitrogen and phosphorus trapping recycling |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109395699A (en) * | 2018-11-14 | 2019-03-01 | 浙江海洋大学 | A method of waste water is handled using microalgae and recycles phosphorus element |
| CN110157747A (en) * | 2019-04-23 | 2019-08-23 | 同济大学 | A kind of method of kitchen garbage processing and resource utilization |
| CN113322078A (en) * | 2021-06-03 | 2021-08-31 | 江西源春环保科技有限公司 | Granules for comprehensively treating heavy metals in soil and preparation method thereof |
Citations (3)
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| CN101734775A (en) * | 2009-12-31 | 2010-06-16 | 中国科学院等离子体物理研究所 | Method for treating algal bloom by using modified attapulgite as flocculant |
| KR101093557B1 (en) * | 2011-11-02 | 2011-12-13 | 한국지질자원연구원 | Method for treating phosphorus and nitrogen comprised in sewage or wastewater using iron ore wastewater |
| CN105668751A (en) * | 2016-01-06 | 2016-06-15 | 中国环境科学研究院 | Low-cost, environmental-protection and high-efficiency alga removal combination material |
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2018
- 2018-02-09 CN CN201810131411.2A patent/CN108383220A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101734775A (en) * | 2009-12-31 | 2010-06-16 | 中国科学院等离子体物理研究所 | Method for treating algal bloom by using modified attapulgite as flocculant |
| KR101093557B1 (en) * | 2011-11-02 | 2011-12-13 | 한국지질자원연구원 | Method for treating phosphorus and nitrogen comprised in sewage or wastewater using iron ore wastewater |
| CN105668751A (en) * | 2016-01-06 | 2016-06-15 | 中国环境科学研究院 | Low-cost, environmental-protection and high-efficiency alga removal combination material |
Non-Patent Citations (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109395699A (en) * | 2018-11-14 | 2019-03-01 | 浙江海洋大学 | A method of waste water is handled using microalgae and recycles phosphorus element |
| CN110157747A (en) * | 2019-04-23 | 2019-08-23 | 同济大学 | A kind of method of kitchen garbage processing and resource utilization |
| CN113322078A (en) * | 2021-06-03 | 2021-08-31 | 江西源春环保科技有限公司 | Granules for comprehensively treating heavy metals in soil and preparation method thereof |
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Application publication date: 20180810 |