CN104310645A - Method for treating papermaking wastewater by using modified fly ash - Google Patents
Method for treating papermaking wastewater by using modified fly ash Download PDFInfo
- Publication number
- CN104310645A CN104310645A CN201410574058.7A CN201410574058A CN104310645A CN 104310645 A CN104310645 A CN 104310645A CN 201410574058 A CN201410574058 A CN 201410574058A CN 104310645 A CN104310645 A CN 104310645A
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- CN
- China
- Prior art keywords
- flyash
- papermaking wastewater
- fly ash
- coal ash
- modified coal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
- C02F2103/28—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention provides a method for treating papermaking wastewater by using modified fly ash, and belongs to the field of papermaking wastewater treatment. Aiming at the existing problem of high treatment cost of papermaking wastewater, a papermaking wastewater treatment method with low treatment cost is provided. The method comprises the steps of: modifying fly ash by using an acid, adding the fly ash into papermaking wastewater with H2O2 and FeSO4, performing such measures as stirring, filtering and the like to obtain treated wastewater. The method is used for achieving resource utilization of the fly ash and reducing the treatment cost of the papermaking wastewater.
Description
Technical field
The invention belongs to pulping wastewater treatment field.
Background technology
Paper waste has water-quality constituents complexity, colourity is high, biodegradability is poor feature, and the water outlet after conventional biochemical process still containing the poisonous and pollutent of difficult for biological degradation, therefore needs to carry out advanced treatment.At present physico-chemical process, advanced oxidation processes, biochemical treatment process and combination technique facture etc. are mainly comprised to the further treatment technique of paper waste, there is investment is high, working cost is high feature mostly.Modified Fenton reaction oxidation style on the basis of traditional F enton reagent oxidation method, adds other metal ions or under being placed in the environment such as ultraviolet, microwave, inducing and produce more OH, and then significantly strengthen the oxidation capacity of Fenton reagent, and save H
2o
2consumption.But need the soda acid of at substantial in pH regulator process, cause reaction working cost expensive.The research object of current modified Fenton reaction oxidation style is the simulated wastewater of single substrate substantially, in paper waste, rarely have use.
Summary of the invention
The object of this invention is to provide a kind of method using rejected fly ash Processing Paper Wastewater.
The present invention is achieved by the following technical programs: one utilizes modified coal ash Processing Paper Wastewater method, gets flyash, and with the supreme clear liquid clarification of deionized water rinsing, discarded by supernatant liquor, flyash puts into 105 DEG C of baking ovens dries; Get pretreated flyash, add deionized water, dropwise add massfraction be 20% sulphur acid for adjusting pH be 2, keep stratification after 2h, elimination supernatant liquor, puts into baking oven dry 6h at 105 DEG C, obtains modified coal ash;
By adding modified coal ash in paper waste, massfraction is 30%H
2o
2the aqueous solution and FeS0
47H
2o, is respectively 34g/L, 8.20mmol/L, 8.8mmol/L, after stirring reaction, aeration 30 min, then adds polyacrylamide (PAM), stirs 3min soon with the stir speed (S.S.) of 300r/min, slowly stir 15min with the stir speed (S.S.) of 80r/min, filter after leaving standstill 1h, obtain processed waste water.
The described stirring reaction time is 45min.
The present invention has following beneficial effect:
The utilization of resources is achieved to waste coal ash, has saved process waste water cost, have good COD treatment effect.
Embodiment
Below in conjunction with specific embodiment, the present invention will be further described.
Specific embodiment: flyash acid modification: get flyash, with the supreme clear liquid clarification of deionized water rinsing, discarded by supernatant liquor, flyash puts into 105 DEG C of baking ovens dries; Get pretreated flyash, add deionized water, dropwise add massfraction be 20% sulphur acid for adjusting pH be 2, keep stratification after 2h, elimination supernatant liquor, puts into baking oven dry 6h at 105 DEG C, obtains modified coal ash;
By adding modified coal ash in paper waste, massfraction is 30%H
2o
2the aqueous solution and FeS0
47H
2o, be respectively 34g/L, 8.20mmol/L, 8.8mmol/L, after stirring reaction 45min, aeration 30 min, then add polyacrylamide (PAM), stir 3min soon with the stir speed (S.S.) of 300r/min, stir 15min slowly with the stir speed (S.S.) of 80r/min, filter after leaving standstill 1h, obtain processed waste water.Carry out detection to waste water before and after process to obtain, COD, by processing front 270mg/L, is reduced to 56mg/L, and COD clearance reaches 79%.
Treatment process described in the embodiment of the present invention achieves the utilization of resources of the exhaust gas products flyash to using coal enterprise such as power plant, simultaneously because process raw material is exhaust gas products, reduces the processing cost of paper waste.
above content is the further description done the present invention in conjunction with concrete embodiment, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (2)
1. utilize a modified coal ash Processing Paper Wastewater method, it is characterized in that: get flyash, with the supreme clear liquid clarification of deionized water rinsing, discarded by supernatant liquor, flyash puts into 105 DEG C of baking ovens dries; Get pretreated flyash, add deionized water, dropwise add massfraction be 20% sulphur acid for adjusting pH be 2, keep stratification after 2h, elimination supernatant liquor, puts into baking oven dry 6h at 105 DEG C, obtains modified coal ash;
By adding modified coal ash in paper waste, massfraction is 30%H
2o
2the aqueous solution and FeS0
47H
2o, is respectively 34g/L, 8.20mmol/L, 8.8mmol/L, after stirring reaction, aeration 30 min, then adds polyacrylamide (PAM), stirs 3min soon with the stir speed (S.S.) of 300r/min, slowly stir 15min with the stir speed (S.S.) of 80r/min, filter after leaving standstill 1h, obtain processed waste water.
2. the method for claim 1, is characterized in that: the described stirring reaction time is 45min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410574058.7A CN104310645A (en) | 2014-10-24 | 2014-10-24 | Method for treating papermaking wastewater by using modified fly ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410574058.7A CN104310645A (en) | 2014-10-24 | 2014-10-24 | Method for treating papermaking wastewater by using modified fly ash |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104310645A true CN104310645A (en) | 2015-01-28 |
Family
ID=52365998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410574058.7A Pending CN104310645A (en) | 2014-10-24 | 2014-10-24 | Method for treating papermaking wastewater by using modified fly ash |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104310645A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107913663A (en) * | 2017-11-03 | 2018-04-17 | 广东省资源综合利用研究所 | A kind of method that COD in beneficiation wastewater is removed using flyash |
| CN109603738A (en) * | 2019-01-16 | 2019-04-12 | 谢天宇 | A kind of application of flyash modified method and modified coal ash |
| CN112340824A (en) * | 2020-10-28 | 2021-02-09 | 贵州中车绿色环保有限公司 | Preparation method of modified fly ash and application of modified fly ash in COD (chemical oxygen demand) removal |
-
2014
- 2014-10-24 CN CN201410574058.7A patent/CN104310645A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107913663A (en) * | 2017-11-03 | 2018-04-17 | 广东省资源综合利用研究所 | A kind of method that COD in beneficiation wastewater is removed using flyash |
| CN109603738A (en) * | 2019-01-16 | 2019-04-12 | 谢天宇 | A kind of application of flyash modified method and modified coal ash |
| CN109603738B (en) * | 2019-01-16 | 2024-06-04 | 谢天宇 | Fly ash modification method and application of modified fly ash |
| CN112340824A (en) * | 2020-10-28 | 2021-02-09 | 贵州中车绿色环保有限公司 | Preparation method of modified fly ash and application of modified fly ash in COD (chemical oxygen demand) removal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150128 |