CN1175927C - Modified adsorbent of fly ash and method for treating waste water by using absorbent - Google Patents
Modified adsorbent of fly ash and method for treating waste water by using absorbent Download PDFInfo
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- CN1175927C CN1175927C CNB031109063A CN03110906A CN1175927C CN 1175927 C CN1175927 C CN 1175927C CN B031109063 A CNB031109063 A CN B031109063A CN 03110906 A CN03110906 A CN 03110906A CN 1175927 C CN1175927 C CN 1175927C
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- waste water
- fly ash
- absorbent
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- flyash
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- Water Treatment By Sorption (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The present invention discloses a modification fly ash adsorption agent, application thereof and a method for treating waste water by the adsorption agent. 35 to 70 parts by weight of fly ash whose granularity conforms to GB1596-91 is selected, 30 to 60 parts by weight of sulphuric acid of 0.5 to 3M is added, and the mixture is evenly stirred; then the mixture is activated for 1 to 3 hours at the temperature of 62 to 90 DEG C; the adsorption agent of 0.5 to 2 wt% of waste water is added to the waste water, the mixture is stirred for 2 to 30 minutes, and then the mixture is precipitated and separated. CODC<r> of treated waste water is smaller than 100, the removal rate of CODC<r> reaches over 78%, chrominance is smaller than 20, and the removal rate of chrominance reaches over 95%.
Description
Technical field
What the present invention relates to is to be a kind of method of sorbent treatment waste water with the modified coal ash, is specially adapted to the advanced treatment of the trade effluent such as coking, printing and dyeing of high COD, high chroma.
Background technology
Many trade effluents, though adopted pre-treatment and biochemical treatment, some pollutent such as COD, colourity equal size are still high, are difficult to reach the standard of effluxing, and therefore need do further processing.Active carbon adsorption can effectively be removed COD and colourity, is widely used in the advanced treatment of waste water.But for industry waste water such as picture coking, printing and dyeing, be difficult to practical application, reason is that this type of contaminated wastewater substrate concentration is higher, adsorbs, regenerative operation is frequent, causes working cost too high, and enterprise is difficult to bear.
Flyash is a kind of industrial residue, wide material sources, price extremely cheap (only being freight charges).Because the chemical constitution and the cellular structure of flyash make it have certain adsorptive power, can remove chemical substances such as COD in the waste water and colourity effectively.The application form of flyash in water treatment has 2 kinds: (1) is as coagulating agent.Flyash is used with acid dipping (great majority are in a liquid state) or with other coagulating agent.Advantage is that expense is low, and is effective.Shortcoming is not easy to operate, and used dosage is wayward, causes waste easily.(2) as sorbent material.Be directly used in the water treatment.Advantage is that cost is low.Shortcoming is that the flyash adsorptive capacity is less, and the sorbent material consumption is big.
Summary of the invention
One of purpose of the present invention provides a kind of modified fly ash absorbent, and it not only has wastewater purifying efficiency preferably, and adsorptive capacity is big, and is with low cost, is easy to control dosage.
Two of purpose of the present invention is methods that applying modified fly ash absorbent is handled waste water, and this method operating procedure is simple, easy to use.
Flyash itself is a kind of porous sorbing material, by SiO
2, Fe
2O
3, Al
2O
3, compositions such as CaO, MgO.Add a certain amount of sulfuric acid, at a certain temperature, to its activation.Vitriolic adds, and can destroy its surface tissue, makes the surface more coarse, and surface-area further increases, and its adsorptive capacity also increases.And, because reaction has part Fe
3+, Al
3+Stripping, treat that it drops in water after, can play the effect of flocculation, accelerated the precipitation of sorbent material.Owing to be to use quantitative acid treatment, therefore can make flyash keep its graininess, should use so conveniently.It goes without doing further handles for flyash after activated, is directly used in water treatment.
Purpose of the present invention is realized by following technical proposals
Modified fly ash absorbent is characterized in that: choose flyash 35～70 weight parts that granularity meets GB1596-91, add sulfuric acid 30～60 weight parts of 0.5～3M, mixing and stirring; In 62～90 ℃ of activation 1～3 hour, the modified fly ash absorbent specific surface area of making can reach 70-100m then
2/ g (BET absorption method).
Applying modified fly ash absorbent is handled the method for waste water, it is characterized in that: sorbent material is added in the waste water, is 0.5～2% weight percent in the ratio of sorbent material and waste water, stirs precipitate and separate 2～30 minutes; Waste water after the processing, COD
Cr＜100, clearance reaches more than 78%, colourity (extension rate)＜20, and clearance reaches more than 95%.
Characteristics of the present invention and positively effect are:
1. modified fly ash absorbent starting material wide material sources of the present invention, cheap, the cost of activation modification is low, and it is also low to be used for its cost of handling waste water.
2. after flyash modified, needn't do further processing, can directly apply among the wastewater treatment.
3. modified fly ash absorbent remains graininess, and dosage is controlled easily during use, is difficult for causing waste.
4. use modified fly ash absorbent to be used to handle waste water, consumption will significantly reduce, and flyash is fully used.And the sorbent material settling velocity is fast, and the mud of generation is few, implements easily.
5. the treatment effect to waste water is good, uses extensively, and the COD in the waste water, colourity are had very ideal treatment effect, the waste water after the processing, COD
Cr＜100, clearance reaches more than 78%, colourity (extension rate)＜20, and clearance reaches more than 95%.
6. do not have discharging wastes, do not produce secondary pollution, the mud of formation can be used for doing the raw material of brickmaking.
7. the used starting material of the present invention mainly are industrial wastes, realize the treatment of wastes with processes of wastes against one another, the purpose of changing waste into valuable.
Description of drawings
Fig. 1 is the process flow sheet that the present invention is used to handle waste water.
Specific implementation
Embodiment 1
(1) activation treatment: adding concentration in 55g flyash is the sulfuric acid 30ml of 1M, stirs, and heats 2 hours down in 80 ℃ then.
(2) handle waste water: the fly ash absorbent after will activating is used among the processing of waste water.
Fig. 1 is seen in draining after the biochemical treatment of processing coked waste water.The flyash 1.5g that gets after the activation adds in the 100ml waste water, stirs static then for some time 5 minutes.
Former water: pH is 7, COD
CrBe 376mg/L, color is brown, and colourity (extension rate) is 230 times.
Processed waste water: pH is 6, COD
CrBe 82mg/L, clearance 78%, colourity (extension rate) is 2.1 times, clearance is 99%.
Embodiment 2
(1) activation treatment: adding concentration in 55g flyash is the sulfuric acid 30ml of 1M, stirs, and heats 2 hours down in 80 ℃ then.
(2) handle waste water: the fly ash absorbent after will activating is used among the processing of waste water.
Handle certain printing and dyeing mill's waste water and see Fig. 1.The flyash 2.0g that gets after the activation adds in the 100ml waste water, stirs static then for some time 30 minutes.
Former water: COD
CrBe 480mg/L, color is black-and-blue, and colourity (extension rate) is 810 times.
Processed waste water: COD
CrBe 76mg/L, clearance 84.2%, colourity (extension rate) is 13 times, clearance is 98.4%.
Claims (2)
1, modified fly ash absorbent is characterized in that: choose flyash 35～70 weight parts that granularity meets GB1596-91, add sulfuric acid 30～60 weight parts of 0.5～3M, mixing and stirring; Then in 62～90 ℃ the activation 1～3 hour, modified fly ash absorbent.
2, the described modified fly ash absorbent of application rights claim 1 is handled the method for waste water, it is characterized in that: sorbent material is added in the waste water, is 0.5～2% weight percent in the ratio of sorbent material and waste water, stirs precipitate and separate 2～30 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031109063A CN1175927C (en) | 2003-01-17 | 2003-01-17 | Modified adsorbent of fly ash and method for treating waste water by using absorbent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031109063A CN1175927C (en) | 2003-01-17 | 2003-01-17 | Modified adsorbent of fly ash and method for treating waste water by using absorbent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1431042A CN1431042A (en) | 2003-07-23 |
| CN1175927C true CN1175927C (en) | 2004-11-17 |
Family
ID=4790118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031109063A Expired - Fee Related CN1175927C (en) | 2003-01-17 | 2003-01-17 | Modified adsorbent of fly ash and method for treating waste water by using absorbent |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101134615B (en) * | 2006-08-30 | 2010-09-22 | 中国科学院等离子体物理研究所 | Method for treating fresh water bloom by magnetic control modified coal ash and flocculating agent |
| CN101134614B (en) * | 2006-08-30 | 2010-12-08 | 中国科学院等离子体物理研究所 | Method for treating town domestic wastewater by modified coal ash and flocculating agent |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100381201C (en) * | 2005-07-28 | 2008-04-16 | 刘转年 | Composite adsorbent contg. flyash and its prepn. method |
| CN100427408C (en) * | 2005-08-17 | 2008-10-22 | 上海电力学院 | Method for treating waste water of mine by using fly ash |
| CN100421780C (en) * | 2006-08-26 | 2008-10-01 | 陈宜平 | Modified coal slag adsorbent and method for preparing same |
| CN100431688C (en) * | 2006-12-13 | 2008-11-12 | 大连理工大学 | Modified fly ash absorbent and method for processing nitrophenol polymerization inhibitor production waste water |
| CN101508498B (en) * | 2009-03-25 | 2011-10-05 | 重庆市大渡口春园工贸公司 | Treatment process for carbonizing wastewater |
| CN101695649B (en) * | 2009-11-09 | 2011-08-31 | 湖南大学 | Application of modified flyash in urban sludge conditioning |
| CN102008936B (en) * | 2010-12-25 | 2013-01-09 | 河南科技大学 | Method for preparing phosphorus adsorbing material from fly ash |
| CN102311151A (en) * | 2011-04-04 | 2012-01-11 | 上海丰信环保科技有限公司 | Method used for removing printing and dying wastewater chromaticity |
| CN105170125A (en) * | 2015-10-30 | 2015-12-23 | 朱忠良 | Printing and dyeing wastewater purifying agent and preparation method thereof |
| CN109503009B (en) * | 2018-12-07 | 2021-05-14 | 山西大学 | Modified magnesium sulfate cement and preparation method thereof |
| CN111807632B (en) * | 2020-07-21 | 2023-01-31 | 吉林化工学院 | Method for treating dye wastewater by using modified fly ash |
| CN114887584B (en) * | 2022-05-20 | 2024-03-29 | 陕西正元粉煤灰综合利用有限公司 | Modified fly ash and preparation method and application thereof |
-
2003
- 2003-01-17 CN CNB031109063A patent/CN1175927C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101134615B (en) * | 2006-08-30 | 2010-09-22 | 中国科学院等离子体物理研究所 | Method for treating fresh water bloom by magnetic control modified coal ash and flocculating agent |
| CN101134614B (en) * | 2006-08-30 | 2010-12-08 | 中国科学院等离子体物理研究所 | Method for treating town domestic wastewater by modified coal ash and flocculating agent |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1431042A (en) | 2003-07-23 |
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Granted publication date: 20041117 Termination date: 20100219 |