CN105217713A - A kind of calcining spathic iron ore degree of depth removes the method for phosphorus in water - Google Patents
A kind of calcining spathic iron ore degree of depth removes the method for phosphorus in water Download PDFInfo
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- CN105217713A CN105217713A CN201510579786.1A CN201510579786A CN105217713A CN 105217713 A CN105217713 A CN 105217713A CN 201510579786 A CN201510579786 A CN 201510579786A CN 105217713 A CN105217713 A CN 105217713A
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Abstract
The invention discloses a kind of method that calcining spathic iron ore degree of depth removes phosphorus in water, it is characterized in that: the spathic iron ore particulate matter of particle diameter between 0.5-3mm in 500-850 DEG C of calcining, make it be rapidly decomposed into rhombohedral iron ore, obtain nano-structured calcining spathic iron ore particulate matter; Then calcining spathic iron ore particulate matter is loaded into as dephosphorization adsorbent in deep phosphorous removal filtering basin, the phosphoric acid salt of trace in Adsorption water, water outlet phosphorus concentration reaches surface water body three class standard.
Description
One, technical field
The present invention relates to the method for sanitary sewage, surface water body deep phosphorous removal.
Two, background technology
Along with the aggravation of water pollutions, generally there is eutrophication in China's surface water body.Country sets up water pollution control key special subjects to study, and drops into huge fund and carries out municipal sewage treatment Facilities Construction, improve the processing rate of city domestic sewage.But current city domestic sewage process generally adopts oxic activated sludge process, but in Aerobic biological process water outlet, the concentration of total nitrogen, total phosphorus still reaches 20-35mg/L, 0.3-3.0mg/L respectively, be 10-50 times of water body in lake second standard.In a lot of situation, sanitary sewage is difficult to stable reach country-level emission standard A through second-stage treatment, needs to increase advanced treatment facility to ensure standard water discharge.Even if sanitary sewage disposal reaches standard of drainage, but for the water body of eutrophication, need ecotope waste water being carried out to stricter denitrogenation dephosphorizing guarantee water body.Especially realize waste water reclaiming as landscape water etc. after sanitary sewage disposal, sewage treatment plants secondary treatment yielding water needs further denitrogenation dephosphorizing could meet waste water reclaiming application requiring.
Lime precipitation, molysite deposition method or aluminium salt precipitation method are generally used in the process of Coal Gas Washing Cycling Water phosphorus.The calcium phosphate solubility product precipitated at neutral ph is comparatively large, controls higher pH value and ensures to precipitate the lower phosphorus concentration of dephosphorization water outlet, not only cause reagent consumption amount excessive, and water outlet pH value is too high, can not meet emission request.Thus can not produce a desired effect with lime treatment low phosphorus.When phosphorus concentration in water is very low, iron, aluminum ion and phosphate radical form colloidal sol, are difficult to normally used settling tank, calcium phosphate precipitation be separated from water.In order to improve precipitation phosphor-removing effect, the precipitation agent far exceeding precipitation phosphorus required dosage must be added, cause iron, aluminum metal ion dosage large.
Existing a lot of scholar is studied in absorption method dephosphorization both at home and abroad, conventional dephosphorization adsorbent mainly contains natural mineral matter and the solid waste such as zeolite, calcite, wilkinite, attapulgite, vermiculite, red mud, flyash, these clay minerals and material have certain adsorption to phosphorus, but loading capacity is low, reproduction ratio is more difficult.In order to improve the adsorptive power of dephosphorization adsorbent, a lot of scholar carries out the preparation research except phosphorus composite material, comprise and make the metal ions such as carrier loaded La, Ce, Fe with organic waste, be carrier loaded La, Al, Fe with mineral such as quartz sand, montmorillonite, attapulgite, zeolites and prepare modified adsorbent, these compound adsorbents have higher dephosphorization adsorption.From domestic and international result of study, it is adsorbent surface active ingredient Fe that above-mentioned matrix material has better adsorbing reason
3+, Al
3+, La
3+, Ce
3+oxyhydroxide and phosphate radical have stronger chemical bonding effect.High with rare-earth element modified sorbing material dephosphorization efficiency by using, but expensive, and the prospect applied is little.Cheap efficient dephosphorization sorbent material still has to be developed.
Three, summary of the invention
The present invention is the weak point for avoiding existing for above-mentioned prior art, provides a kind of calcining spathic iron ore degree of depth to remove the method for phosphorus in water.
Technical solution problem of the present invention, adopts following technical scheme:
The present invention's calcining spathic iron ore degree of depth removes the method for phosphorus in water, and its feature is to carry out in accordance with the following steps:
(1) the deposition spathic iron ore ore selecting spathic iron ore content to be greater than 60%;
(2) the ore reduction of deposition spathic iron ore, screening, the spathic iron ore particulate matter of particle diameter between 0.5 ~ 3mm is obtained;
(3) described spathic iron ore particulate matter in 500 ~ 850 DEG C of calcinings, fast transition is take rhombohedral iron ore as the nano-structured calcining spathic iron ore particulate matter of dominant phase;
(4) described calcining spathic iron ore particulate matter is loaded in deep phosphorous removal filtering basin as dephosphorization adsorbent, phosphorous sanitary sewage secondary treatment yielding water or micro-polluted water or enriched surface water, flow through described deep phosphorous removal filtering basin with hydraulic detention time 0.5-2h filter type to process, after process, water outlet phosphorus concentration is less than 0.1mg/L.
During with the sanitary sewage secondary treatment yielding water of dephosphorization adsorbent process phosphorus concentration 1mg/L of the present invention, effective run time reaches 6 years, is used as the nutritional granular material of soilless culture after dephosphorization adsorbent material failure.
The present invention's calcining spathic iron ore degree of depth removes the method for phosphorus in water, and its outstanding effect is embodied in the following aspects:
1, spathic iron ore is widely distributed a kind of carbonate minerals, is mainly formed at anoxic, anaerobic, with stratiform and lensing output in sedimentary formation.China contains abundant low-grade deposition spathic iron ore resource, and spathic iron ore ore is usually exploited as associated minerals at some metal mines.Low-grade spathic iron ore because ore dressing processing difficulties does not also obtain Appropriate application at metallurgy industry, is usually abandoned as barren rock, was both occupied soil, destroy environment again under normal circumstances in mining.Low-grade spathic iron ore ore prepares nano-structured adsorption and dephosphorization material by calcining, has both solved the outlet of low-grade spathic iron ore, again for water treatment provides functional material.
2, spathic iron ore becomes nanometer in the process of rhombohedral iron ore mutually at 500-850 DEG C of calcining fast decoupled, thus can obtain specific surface area and be greater than 40m
2the nano-structured calcining spathic iron ore material that/g, porosity are greater than 25%.This nano-structured calcining spathic iron ore porous material has efficient obligate adsorption to the phosphorus of trace in water, and water outlet phosphorus concentration can be made to reach three class surface water body standards with trace amounts of phosphorus in calcining spathic iron ore Adsorption water, the absorption cycle of operation can more than 5 years.
3, spathic iron ore material surface is calcined while adsorption and dephosphorization, because surfaces externally and internally is to organic absorption and microorganic adhesion, there is aerobic nitrification bacterium and denitrifying bacteria respectively at the upper and lower different sites in filter tank simultaneously, to the ammonia nitrogen in water and nitrate, there is removal effect simultaneously.
Four, embodiment
Non-limiting examples of the present invention is described below.
Embodiment 1
Select the deposition spathic iron ore ore that spathic iron ore content is greater than 60%;
Spathic iron ore ore reduction, screening are obtained the spathic iron ore particulate matter of particle diameter between 1-2mm;
Above-mentioned spathic iron ore particulate matter in 600 ~ 700 DEG C of calcinings, make its fast decoupled change rhombohedral iron ore into, obtain nano-structured calcining spathic iron ore particulate matter;
Above-mentioned calcining spathic iron ore particulate matter is loaded into diameter 100mm, height 1500mm filters in post, as analog depth dephosphorization filtering basin, loading height 1000mm;
Using tap water preparation containing the phosphorus concentration Simulated Water that is 10mg/L as experimental water, above-mentioned analog depth dephosphorization filtering basin are flow through with hydraulic detention time 1h, water outlet phosphorus concentration is less than 0.1mg/L all the time after testing, until water outlet phosphorus concentration just starts to occur being greater than 0.1mg/L after running 8 months.
Show that if calculate process is containing sanitary sewage after the second-stage treatment of phosphorus concentration 1mg/L, long nearly 6 years of its life-span.
Claims (1)
1. remove a method for phosphorus in water by the calcining spathic iron ore degree of depth, it is characterized in that carrying out in accordance with the following steps:
(1) the deposition spathic iron ore ore selecting spathic iron ore content to be greater than 60%;
(2) the ore reduction of deposition spathic iron ore, screening, the spathic iron ore particulate matter of particle diameter between 0.5 ~ 3mm is obtained;
(3) described spathic iron ore particulate matter in 500 ~ 850 DEG C of calcinings, fast transition is take rhombohedral iron ore as the nano-structured calcining spathic iron ore particulate matter of dominant phase;
(4) described calcining spathic iron ore particulate matter is loaded in deep phosphorous removal filtering basin as dephosphorization adsorbent, phosphorous sanitary sewage secondary treatment yielding water or micro-polluted water or enriched surface water, flow through described deep phosphorous removal filtering basin with hydraulic detention time 0.5-2h filter type to process, after process, water outlet phosphorus concentration is less than 0.1mg/L.
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| CN201510579786.1A CN105217713B (en) | 2015-09-11 | 2015-09-11 | A kind of method for removing phosphorus in water removal with calcining siderite depth |
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| CN201510579786.1A CN105217713B (en) | 2015-09-11 | 2015-09-11 | A kind of method for removing phosphorus in water removal with calcining siderite depth |
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| CN105217713B CN105217713B (en) | 2018-06-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105858832A (en) * | 2016-04-12 | 2016-08-17 | 合肥工业大学 | Heavy metal wastewater treatment material and method thereof |
| CN113004054A (en) * | 2021-04-13 | 2021-06-22 | 广西博世科环保科技股份有限公司 | Enhanced efficient phosphorus removal constructed wetland substrate and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100992829B1 (en) * | 2010-02-03 | 2010-11-09 | 주식회사 환경시설관리공사 | System phosphorus treatment |
| CN103086460A (en) * | 2013-02-04 | 2013-05-08 | 合肥工业大学 | Phosphorus-removing method based on nano-grade iron |
| CN103204547A (en) * | 2012-01-16 | 2013-07-17 | 中国科学院化学研究所 | Ferrum oxyhydroxide and ferrum oxide hierarchical nanostructured material, preparation methods and applications thereof |
| CN103801254A (en) * | 2014-02-25 | 2014-05-21 | 合肥工业大学 | Siderite-based nitrogen and phosphorus removal material and application method thereof |
-
2015
- 2015-09-11 CN CN201510579786.1A patent/CN105217713B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100992829B1 (en) * | 2010-02-03 | 2010-11-09 | 주식회사 환경시설관리공사 | System phosphorus treatment |
| CN103204547A (en) * | 2012-01-16 | 2013-07-17 | 中国科学院化学研究所 | Ferrum oxyhydroxide and ferrum oxide hierarchical nanostructured material, preparation methods and applications thereof |
| CN103086460A (en) * | 2013-02-04 | 2013-05-08 | 合肥工业大学 | Phosphorus-removing method based on nano-grade iron |
| CN103801254A (en) * | 2014-02-25 | 2014-05-21 | 合肥工业大学 | Siderite-based nitrogen and phosphorus removal material and application method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105858832A (en) * | 2016-04-12 | 2016-08-17 | 合肥工业大学 | Heavy metal wastewater treatment material and method thereof |
| CN113004054A (en) * | 2021-04-13 | 2021-06-22 | 广西博世科环保科技股份有限公司 | Enhanced efficient phosphorus removal constructed wetland substrate and preparation method thereof |
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| CN105217713B (en) | 2018-06-15 |
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