CN1202019C - Waste brick application in waste water treatment - Google Patents

Waste brick application in waste water treatment Download PDF

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Publication number
CN1202019C
CN1202019C CNB031003966A CN03100396A CN1202019C CN 1202019 C CN1202019 C CN 1202019C CN B031003966 A CNB031003966 A CN B031003966A CN 03100396 A CN03100396 A CN 03100396A CN 1202019 C CN1202019 C CN 1202019C
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CN
China
Prior art keywords
phosphorus
wastewater treatment
waste
adsorbing
wastewater
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CNB031003966A
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Chinese (zh)
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CN1424260A (en
Inventor
胡洪营
刘超翔
钱易
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清华大学
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Priority to CNB031003966A priority Critical patent/CN1202019C/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

Abstract

The present invention relates to the application of waste bricks for wastewater treatment, which belongs to the technical field of wastewater treatment. The present invention utilizes waste bricks of a building site to be mechanically crushed into granular adsorbing agents with a certain extent, and the granular adsorbing agents have the functions of filling materials of a bioreactor for biological wastewater treatment. The granular adsorbing agents can be used for adsorbing and removing harmful elements of phosphorus, etc. in wastewater, and the maximum adsorption quantity of the adsorbing agents for the phosphorus is respectively more than 80 times and more than 20 times as much as the maximum adsorption quantity of the general adsorbing agent zeolite and the traditional active aluminum oxide of furnace slag for the wastewater treatment. The adsorbing agents of the present invention have the advantages of large absorption capacity, simple preparation, low cost, full utilization of waste resources, wide range of application of the wastewater, etc.

Description

The useless application of fragment of brick in wastewater treatment
Technical field
The invention belongs to technical field of waste water processing, particularly a kind of Cheap highly effective is removed the wastewater treatment sorbent material and the filler of body eutrophication pollutent such as phosphorus in the waste water.
Background technology
Along with the industrial and agricultural production urbanization that develops rapidly and live, the sanitary wastewater, trade effluent and the farmland rainwash that contain nutritive substances such as higher concentration nitrogen, phosphorus import lake, reservoir and river, and in water body, accumulate, stimulate algal bloom in the water body, cause in the fresh water water body that promptly common alleged body eutrophication takes place " red tide " in " wawter bloom " and seawater.The standard that American National Environmental Protection Agency (EPA) divides body eutrophication is exactly that total phosphorus concentration is greater than 0.02mg/L.The ground water environment quality standard of China's regulation is that total phosphorus concentration is less than 0.1mg/L (GB3838-88).Therefore remove in the water body pollutent particularly the phosphorus in the waste water have great importance to preventing body eutrophication.
Usually the method for removing phosphorus in the water body has biological process, chemical method and absorption method.Biological phosphate-eliminating is meant that generally the dephosphorization bacterial that utilizes in the active sludge can this process of huge uptake phosphorus in aerobic environment.But in case be in anaerobic state, dephosphorization bacterial will discharge the excessive phosphorus in the cell, so the dephosphorization instability, and exists the phosphorus containing sludge disposal concerns.Chemical dephosphorization is meant by adding chemical agents such as calcium salt, molysite or aluminium salt and forms the insoluble phosphate precipitation, by solid-liquid separation the phosphorus in the waste water removed then.There is also the working cost height, control condition complexity, operation shortcoming such as loaded down with trivial details.
Sorbent material can be divided into three types to the absorption of phosphorus: physical adsorption, chemical precipitation and physical and chemical adsorption.Physical adsorption is meant: phosphoric acid salt is a kind of more difficult dissociated compound, might be subjected to the absorption of solid surface energy, and relatively concentrate on the interface of solid-liquid phase.This absorption generally is reversible, and free energy is lower, discharges than being easier to.Chemical precipitation is: positively charged ions such as calcium, magnesium, iron, aluminium can produce the very little compound of solubleness with phosphoric acid salt.Therefore, phosphate anion easily produces chemisorption and is fixed.The chemisorption reversibility is little, is adsorbed to form the very difficult release in back.Physical and chemical adsorption is: since solid phase surface with negatively charged ion, make the phosphate radical anion in the solution be attracted to solid phase surface by ion-exchange.The energy variation of this absorption is between physical adsorption and chemisorption.The phosphate ion of absorption can be other ion and replaces out.
The sorbent material of iron content, aluminum compound to the absorption of phosphorus and fixing mainly be chemical precipitation, physical adsorption and machinery close and hold.Ferric oxide, aluminium mineral can also adsorb phosphoric acid from the teeth outwards except by precipitation and exchange absorption and the phosphorus effect.It is when ironic hydroxide or alumine hydroxide colloid cohesion that machinery closes the effect of holding, and the phosphoric acid in the solution is closed hold in gelinite, or be wrapped in calcium phosphate precipitation or other phosphorous solid surface, reduces its solubleness.Three kinds of modes that iron, aluminum oxide adsorb phosphorus, simultaneous often.
Adopt absorption method to phosphorus adsorb remove have simple to operate, with low cost, be convenient to reclaim advantages such as useful resources, sorbent material can be recycled.The general phosphorus adsorbent that uses mainly comprises activated alumina, natural materials (as red soil, flying dust etc.) and synthetic sorbent material (as gac).A common weak point of the sorbent material of known natural and simple modification is that adsorptive capacity is all on the low side, though and the high-performance water treatment absorbent loading capacity height of synthetic exploitation, cost costliness, and can not being applied directly in the composite waste of high density.
Filler has a wide range of applications in the wastewater treatment, bio membrane processes such as the biological contact oxidation process during trade effluent, sanitary wastewater are handled, biological fluidized bed, BAF, it is a kind of high-efficiency wastewater treatment, and filler is the core of this technology, no matter be that filler all plays an important role in aerobic, double oxygen or the anaerobic process.Along with increasing the weight of day by day of pollution of waterhead, in the biological pre-treatment process of feedwater micro-polluted raw, filler has also been brought into play important performance.
Trade effluent, sanitary wastewater are handled in the biomembrance process wastewater treatment, and filler plays fixed biomembranous effect, is the core of membrane process craft, and the success or failure of technology have direct relation with the filler of selecting for use.When generally selecting filler for use, take all factors into consideration following some: 1. surface irregularity, the hole prosperity, suitable microorganism grows within it; 2. microorganism colonization is fast, the aging microbial film stability that easily comes off 3., require filler can be antiacid, alkali resistant, resistance to oxidation, readily biodegradable is difficult for aging etc.; 4. installation and maintenance are convenient; 5. light weight, physical strength is big; 6. low price, wide material sources etc.Select appropriate filler, can shorten the reaction times of technology, improve operating performance and operation stability etc.Filler commonly used in these technologies has, as biological ceramic particle, gac, zeolite, diatom scholar, quartz sand, oyster shell and some artificial synthetic inorganic light weight carriers, the characteristics of these fillers are need not the installation work of above-mentioned filler, only need be positioned in the treatment unit during application and get final product, easy to use, and change simple, therefore having reduced installation and operation management workload, is the development trend of filler from now on.This filler of many uses in the biomembrance process waste water treatment process, but these fillers generally do not have the function of absorb polluted matter in wastewater treatment, minority has the filler of outstanding absorption property, as gac, and but price very high (as 1000~3000 yuan/ton of gacs); To the well behaved zeolite of ammonia nitrogen absorption in the waste water (but it is to phosphorus weak effect), price is also wanted 400~600 yuan/ton.
Summary of the invention
One of purpose of the present invention provides a kind of phosphorus adsorbent that is used for wastewater treatment.
Another object of the present invention provides a kind of filler that is used in the biomembrance process wastewater treatment.
Technical scheme of the present invention is as follows:
Utilize useless fragment of brick as the application of phosphorus adsorbent in wastewater treatment and the application that utilizes useless fragment of brick filler in the biomembrance process wastewater treatment.
Described fragment of brick is the discarded queen closer in construction site, and the main raw material of this fragment of brick is a clay by analysis, is rich in iron, and composition is silicates, mineral such as oxide-based, sulfide-based.This fragment of brick after to a certain degree Mechanical Crushing becomes particle diameter to be the particle of 0.3~5cm, is used for the adsorption treatment of the phosphorus of waste water.By repeatedly test, show that this sorbent material compares with wastewater treatment sorbent material commonly used the absorption of phosphorus in the waste water, adsorptive capacity obviously increases, and rate of adsorption is obviously accelerated.
It has loading capacity height, preparation simple, with low cost, make full use of advantages such as waste resource, appropriate pH scope be wide.
The prepared queen closer of the present invention has the function that is equipped with filler in the biomembrance process waste water treatment process concurrently.It is the particle of 0.3~5cm that this useless fragment of brick is become particle diameter through Mechanical Crushing to a certain degree, useless brick structure after the fragmentation is loose, surface irregularity, porosity is big, hydraulic conductivity can be good, therefore it also can be used as the filler of a kind of excellent property of bio-reactor in the wastewater treatment (as artificial swamp, biological fluidized bed and BAF), has the function of microbe carrier and phosphorus adsorbent concurrently.After measured, broken back particle diameter is the useless fragment of brick of 0.3~5cm, and porosity is 0.5~0.75, and fluid conductivity is 1 * 10 3Mm/s~1 * 10 4Mm/s.Its Costco Wholesale is also very cheap in addition.
Embodiment
Embodiment 1
With particle diameter the phosphorus in the fragment of brick absorption phosphorus-containing wastewater of 0.3~5cm.In temperature is to carry out adsorption experiment under the condition that 25 ℃, initial pH are 7, initial phosphorus concentration is 100mg/L.Phosphorus concentration when adsorption equilibrium is under the condition of 0.18mg/L, and the sorbent material balance phosphorus adsorptive capacity that records reaches the 1.78mg-P/g-sorbent material, for the control group slag at more than 19 times of the adsorptive capacity 0.09mg-P/g under the similarity condition.
Embodiment 2
With the phosphorus in this adsorbents adsorb waste water, be to carry out adsorption experiment under the condition that 25 ℃, initial pH are 7, initial phosphorus concentration is 80mg/L in temperature.Phosphorus concentration when adsorption equilibrium is under the condition of 0.06mg/L, and the sorbent material balance phosphorus adsorptive capacity that records reaches the 1.19mg-P/g-sorbent material.For control group zeolite and haydite at more than 50 times and 3 times of the adsorptive capacity 0.021mg-P/g under the similarity condition and 0.39.
Embodiment 3
Being the phosphorus in this adsorbents adsorb waste water of 0.3~5cm with particle diameter, is to carry out adsorption experiment under the condition that 20 ℃, initial pH are 7, initial phosphorus concentration is 75mg/L in temperature.The concentration of per 30 minutes sampling and measuring phosphorus.Reach balance through absorption in 9 hours, its saturated adsorption capacity is the 0.91mg-P/g-sorbent material.
Embodiment 4
The fragment of brick that to get 7 parts of particle diameters be 0.3~5cm adds certain volume KH then respectively 2PO 4-CaCl 2Solution makes that its initial phosphorus concentration is respectively 3,5,10,20,40,80,100mg/L.On 25 ℃ of constant temperature shaking tables, shook 24 hours.According to the adsorption isotherm line of balance, the fragment of brick maximum adsorption capacity that calculates is the 2.50mg-P/g-sorbent material, and the maximum adsorption capacity of control group zeolite, slag and haydite only is 0.03,0.12 and the 0.96mg-P/g-sorbent material.

Claims (1)

1. be main raw material with the clay, composition is the application as phosphorus adsorbent in wastewater treatment of the useless fragment of brick of silicates, metal oxide-type and sulfide-based mineral.
CNB031003966A 2003-01-17 2003-01-17 Waste brick application in waste water treatment CN1202019C (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CNB031003966A CN1202019C (en) 2003-01-17 2003-01-17 Waste brick application in waste water treatment

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CN1424260A CN1424260A (en) 2003-06-18
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101948164A (en) * 2010-09-13 2011-01-19 中国水产科学研究院黄海水产研究所 Biological membrane quick-constructing method used in seawater factory breeding cycle water purification system

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CN102351565A (en) * 2011-09-27 2012-02-15 环境保护部南京环境科学研究所 Method for preparing water treatment phosphorus accumulation filler by sintering with household garbage incineration residues
CN102531093A (en) * 2012-01-17 2012-07-04 中国科学院水生生物研究所 Method for removing phosphorus by utilizing waste bricks
CN103304033A (en) * 2012-03-15 2013-09-18 中国科学院城市环境研究所 Artificial wetland system taking oyster shell-waste brick-zeolite as composite filler
CN103977636A (en) * 2014-05-08 2014-08-13 常州大学 Method for preparing water treatment filter material from waste red brick block
CN103978009A (en) * 2014-05-08 2014-08-13 常州大学 Method for preparing artificial wetland matrix material by using powdered waste red brick block
CN105880252A (en) * 2014-05-08 2016-08-24 江苏常环环境科技有限公司 Method for preparing constructed wetland padding from discarded red brick blocks and steel slag
CN105110591B (en) * 2015-10-10 2017-08-25 宁波市海洋与渔业研究院 A kind of cultivating pool substrate modifier
CN105836898B (en) * 2016-05-27 2020-05-01 盛世生态环境股份有限公司 Artificial wetland composite substrate containing modified waste bricks and preparation method thereof
CN106277640A (en) * 2016-09-21 2017-01-04 东莞市联洲知识产权运营管理有限公司 A kind of low-temperature denitrification phosphorous removal method of low-carbon-source sewage
CN108889267A (en) * 2018-07-15 2018-11-27 南京信息工程大学 A kind of method that modified abandoned common brick removes phosphorus in water removal
CN109731544A (en) * 2019-01-30 2019-05-10 中国矿业大学 A kind of red mud-clinker-cementitious composite dephosphorization agent preparation method
CN109851167B (en) * 2019-01-31 2020-12-11 华南农业大学 Biological trickling filter, high-load biological trickling filter combined landscape filter bed system and process
CN110228972A (en) * 2019-06-13 2019-09-13 湖南鑫恒环境科技有限公司 A kind of leachate processing method containing heavy metal waste

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101948164A (en) * 2010-09-13 2011-01-19 中国水产科学研究院黄海水产研究所 Biological membrane quick-constructing method used in seawater factory breeding cycle water purification system

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