CN105107522A - Ferro-manganese composite oxide catalyst and preparation method thereof - Google Patents
Ferro-manganese composite oxide catalyst and preparation method thereof Download PDFInfo
- Publication number
- CN105107522A CN105107522A CN201510540793.0A CN201510540793A CN105107522A CN 105107522 A CN105107522 A CN 105107522A CN 201510540793 A CN201510540793 A CN 201510540793A CN 105107522 A CN105107522 A CN 105107522A
- Authority
- CN
- China
- Prior art keywords
- manganese composite
- composite oxides
- solution
- ferro
- ferro manganese
- 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.)
- Granted
Links
Landscapes
- Catalysts (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention relates to a ferro-manganese composite oxide catalyst and a preparation method thereof. The ferro-manganese composite oxide catalyst is granular and is prepared by calcining polyvinyl alcohol, sodium dodecyl benzene sulfonate (SDBS), ferrous sulfate, sodium carbonate and natural ferro-manganese ore after reaction. The catalyst can be used for advanced degradation of papermaking wastewater after biochemical treatment. The catalyst disclosed by the invention is changed to ferro-manganese composite oxide particles from conventional ferrous sulfate, can be reused after calcination, is low in chemical sludge output, can save sludge treatment cost, can reduce production of secondary pollution, and can easily realize solid-liquid separation.
Description
Technical field
The present invention relates to a kind of ferro manganese composite oxides catalyst and preparation method thereof, belong to water-treatment technology field.
Background technology
Pulp and paper industry is the important component part of Chinese national economy, but it also becomes one of important pollution entering the water of China.Wastewater discharge is large, and it contains lignin and the cellulose of high-concentration biological difficult degradation.Fibre suspension contains a large amount of organic matters, can consume dissolved oxygens a large amount of in water, thus can make water degradation after these organic matter fermentations decompose.Also containing a large amount of, there is persistent noxious material in paper waste, human health is worked the mischief.It is the method that physical treatment and biochemical treatment combine that China's Processing Paper Wastewater mainly adopts, but still has more benzene ring structure lignin family macromolecule organic matter in the water after process, and colourity, COD etc. are still higher.
Fenton treatment technology is one of current conventional further treatment technique, can effective all kinds of organic pollution in degradation of sewage by the strong oxidizing property hydroxyl radical free radical that produces, has decolorizing effect simultaneously.But employing Fenton process, need the pH value of waste water to be adjusted to 2.5-3 before process, after reaction, pH value is adjusted to neutrality, acid adjustment repeatedly, alkali tune add processing cost, and produce a large amount of flocculation sediments, cause the secondary pollution of water body.
Summary of the invention
For existing deficiency, the invention provides a kind of ferro manganese composite oxides catalyst, adopt this catalyst to carry out advanced treating to paper-making effluent, can not produce a large amount of flocculation sediments, treatment effeciency is high and cost is low, reaches advanced treating to paper-making effluent.
Technical scheme of the present invention is as follows:
A kind of ferro manganese composite oxides catalyst of the present invention is graininess, and use Cu-K alpha ray to carry out XRD sign to material b, it is 20.8 °, 26.6 °, 36.5 °, 36.5 °, 40 °, 50 °, 60 ° at 2 θ and shows SiO
2characteristic peak; Be 23 °, 33 °, 38.3 °, 55.3 ° at 2 θ and show α-Mn
2o
3characteristic peak; Be 24 °, 33.1 °, 35.6 °, 49.3 °, 54 ° at 2 θ and show α-Fe
2o
3characteristic peak.
Ferro manganese composite oxides catalyst grain diameter is 1-3mm.
The present invention also provides the preparation method of ferro manganese composite oxides catalyst, comprises step as follows:
1) get polyvinyl alcohol and add distilled water, heating stirring and dissolving, is cooled to room temperature, obtained poly-vinyl alcohol solution, and the addition of polyvinyl alcohol and the mass ratio of distilled water are 1:(8-12), unit: 100g/L;
2) poly-vinyl alcohol solution is added in copperas solution together with neopelex solution, magnetic agitation 1-2min, then add sodium carbonate liquor, obtained mixed solution;
The molar concentration of described neopelex solution is (0.1-0.3) mol/L, and the molar concentration of copperas solution is (1.1-1.5) mol/L, and the molar concentration of sodium carbonate liquor is (2-3) mol/L;
Poly-vinyl alcohol solution: neopelex solution: copperas solution: sodium carbonate liquor volume ratio is (3-7): (15-25): (20-40): (6-10);
3) get Natural Manganese iron ore and add step 2) in obtained mixed solution, stirring reaction 3-10h, adds Natural Manganese iron ore 200-400g in often liter of mixed solution; Reaction terminates rear separate solid particles, is dried by solid particle, then at 500-600 DEG C, calcines 2-4h, and cooling, obtains product.
The ferro manganese composite oxides class Fenton advanced treating catalyst that the present invention obtains is graininess, be calcine after being reacted by polyvinyl alcohol, neopelex, ferrous sulfate, sodium carbonate and Natural Manganese iron ore to obtain, the mass ratio of polyvinyl alcohol, neopelex, ferrous sulfate, sodium carbonate and Natural Manganese iron ore is 1:(1 ~ 4): (15 ~ 25): (3 ~ 6): (35 ~ 45).Particle diameter is at 1-3mm, and for iron particulate load is in ferromanganese mineral surface, cost is low, natural environmental-protective, and it is convenient to reclaim, with H
2o
2produce strong oxidizing property hydroxyl radical free radical OH, all have stronger degradation effect to benzene ring structure lignin family macromolecule organic matter, colourity and COD in waste water, and a large amount of chemical sludges can not be produced.
Above-mentioned steps 1) in, the average degree of polymerization of polyvinyl alcohol is 1700 ~ 1800, and the addition of polyvinyl alcohol and the mass ratio of distilled water are 1:5, unit: 100g/L.
Above-mentioned steps 2) poly-vinyl alcohol solution: neopelex solution: copperas solution: sodium carbonate liquor volume ratio is 5:20:30:8.
Above-mentioned steps 3) in calcining heat be 520-580 DEG C, calcination time 2-4h, highly preferred, calcining heat is 550 DEG C, calcination time 3h.
Natural Manganese iron ore is current material, can buy in market, and the Natural Manganese iron ore that the present invention uses is purchased from Gongyi, Henan ore deposit factory.
The present invention also provides a kind of application of ferro manganese composite oxides catalyst, and described ferro manganese composite oxides catalyst is used for the paper waste depth degradation after biochemical treatment.
Preferred further, the application of ferro manganese composite oxides catalyst, embody rule method is as follows:
Ferro manganese composite oxides catalyst and hydrogen peroxide are added in pending waste water, pending waste water quality is: COD
cr≤ 500mg/L, SS≤100mg/L, colourity≤100; 20-40min is stirred under 20-30 DEG C of condition.
The present invention is preferred, and the dosage of catalyst and the mass ratio of waste water are about 1:(10-40), described oxidant is the hydrogen peroxide of mass fraction 20-40%, and the volume ratio of hydrogen peroxide and waste water is 1:1000-1:3000.
The present invention replaces traditional ferrous salt for catalyst with ferro manganese composite oxides particle, take hydrogen peroxide as oxidant, treating technology process is carried out to waste water, hydrogen peroxide catalytic decomposition is generated hydroxyl radical free radical (OH) and superoxide ion, organic matter in waste water, bacterium, virus etc. are oxidized to carbon dioxide, water and inorganic molecules, can use in wider pH (3-8) scope, can efficiently, low cost, this type of waste water of stable process, water outlet can reach the first discharge standard in GB18918-2002 " integrated wastewater discharge standard ".Cost of the present invention is low, and technological process is simple, easily realizes industrialization.
Beneficial effect of the present invention is as follows:
1, catalyst cost of the present invention is low, sewage treatment technology process and simple to operate, is convenient to realize industrialization.
2, catalyst applicable pH range of the present invention is wide, does not need to regulate pH value of waste water in advance, simplify processes technological process, reduces reagent cost.
3, catalyst of the present invention becomes ferro manganese composite oxides particle from traditional ferrous sulfate, and this catalyst can be recycled again by calcining.Chemical sludge yield is low, saves Treatment of Sludge cost, reduces the generation of secondary pollution.
4, catalyst of the present invention is granular solids, easily realizes Separation of Solid and Liquid.Compared with conventional powder shape catalyst, easy to be recycled and regeneration.Through this catalyst treatment, effluent quality meets GB18918-2002 " integrated wastewater discharge standard " first discharge standard.
Accompanying drawing explanation
Fig. 1 be the obtained ferro manganese composite oxides particle of the embodiment of the present invention 2 XRD collection of illustrative plates;
Fig. 2 is that ferro manganese composite oxides particle of the present invention changes COD treatment effect curve map with pH;
Fig. 3 is that ferro manganese composite oxides particle of the present invention changes colourity treatment effect curve map with pH;
Fig. 4 is that ferro manganese composite oxides particle of the present invention changes ss treatment effect curve map with pH;
Detailed description of the invention
Below in conjunction with embodiment, technical scheme of the present invention is described further, but institute of the present invention protection domain is not limited thereto.
Raw material in embodiment is commercial products, all can buy in market.
Embodiment 1:
The preparation of ferro manganese composite oxides catalyst
Preparation process:
1) get 100g polyvinyl alcohol and add 10L distilled water, heating stirring and dissolving, is cooled to room temperature, obtained poly-vinyl alcohol solution,
2) poly-vinyl alcohol solution is added in the copperas solution of molar concentration 1.2mol/L together with the neopelex solution of molar concentration 0.2mol/L, magnetic agitation 2min, then the sodium carbonate liquor of molar concentration 2.5mol/L is added, obtained mixed solution; Poly-vinyl alcohol solution: neopelex solution: copperas solution: sodium carbonate liquor volume ratio is 5:20:30:8;
3) get Natural Manganese iron ore and add step 2) in obtained mixed solution, stirring reaction 4h, adds Natural Manganese iron ore 300g in often liter of mixed solution; Reaction terminates rear separate solid particles, is dried by solid particle, then at 450 DEG C, calcines 3h, cooling, and obtained ferro manganese composite oxides catalyst, is denoted as material a.
Embodiment 2:
With the preparation method of the ferro manganese composite oxides catalyst described in embodiment 1, difference is:
Step 3), the solid particle after drying is calcined 3h at 550 DEG C, and obtained ferro manganese composite oxides catalyst, is denoted as material b.
Use Cu-K alpha ray to carry out XRD sign to material b, as shown in Figure 1, it is 20.8 °, 26.6 °, 36.5 °, 36.5 °, 40 °, 50 °, 60 ° at 2 θ and shows SiO the XRD collection of illustrative plates obtained
2characteristic peak; Be 23 °, 33 °, 38.3 °, 55.3 ° at 2 θ and show α-Mn
2o
3characteristic peak; Be 24 °, 33.1 °, 35.6 °, 49.3 °, 54 ° at 2 θ and show α-Fe
2o
3characteristic peak.
Learn through spectrofluorimetry, siderochrome composite oxides SiO described above
2content is approximately 15%, α-Mn
2o
3content is approximately 30-50%, α-Fe
2o
3content is approximately 20-40%, trace element about 0.1%.
Embodiment 3:
With the preparation method of the ferro manganese composite oxides catalyst described in embodiment 1, difference is:
Step 3), the solid particle after drying is calcined 3h at 650 DEG C, and obtained ferro manganese composite oxides catalyst, is denoted as material c.
Catalyst applicable pH range of the present invention is wide, and in the scope of pH3 ~ 8, ferro manganese composite oxides particle of the present invention is shown in shown in Fig. 2-Fig. 4 the treatment effect of COD, colourity and ss with pH change.
Application experiment example 1
Material a obtained for embodiment 1 is applied to pulp and paper effluent treatment, and paper-making effluent COD is 258mg/L, and pH value is 7.6, paper-making effluent 1L is introduced class Fenton's reaction system, the quality adding above-mentioned material a is 80g, adds the hydrogen peroxide of 0.6mL30%, reaction 30min.Flocculation, precipitation.The COD of last sewage is 170mg/L, pH value is 7.5, colourity 40.Specific experiment the results are shown in Table 1.
Application experiment example 2
Material b obtained for embodiment 2 is applied to pulp and paper effluent treatment, and paper-making effluent COD is 258mg/L, and pH value is 7.6, paper-making effluent 1L is introduced class Fenton's reaction system, the quality adding above-mentioned material b is 80g, add the hydrogen peroxide of 0.6mL30%, reaction 30min.Flocculation, precipitation.The COD of last sewage is 42mg/L, pH value is 7.5, colourity 20, reaches the first discharge standard in GB18918-2002 " integrated wastewater discharge standard ".Specific experiment the results are shown in Table 1.
Application experiment example 3
Material c obtained for embodiment 3 is applied to pulp and paper effluent treatment, and paper-making effluent COD is 258mg/L, and pH value is 7.6, paper-making effluent 1L is introduced class Fenton's reaction system, the quality adding above-mentioned material c is 80g, adds the hydrogen peroxide of 0.6mL30%, reaction 30min.Flocculation, precipitation.The COD of last sewage is 205mg/L, pH value is 7.5, colourity 50.Specific experiment the results are shown in Table 1.
Table 1
The foregoing is only the preferred embodiment of the present invention; it should be noted that; for a person skilled in the art; under the premise without departing from the principles of the invention; portion of techniques feature of the present invention is modified; and not departing from the connotation of technical solution of the present invention, these changes all should be encompassed within the technical scheme scope of request of the present invention protection.
Claims (10)
1. a ferro manganese composite oxides catalyst is graininess, and use Cu-K alpha ray to carry out XRD sign to material b, it is 20.8 °, 26.6 °, 36.5 °, 36.5 °, 40 °, 50 °, 60 ° at 2 θ and shows SiO
2characteristic peak; Be 23 °, 33 °, 38.3 °, 55.3 ° at 2 θ and show α-Mn
2o
3characteristic peak; Be 24 °, 33.1 °, 35.6 °, 49.3 °, 54 ° at 2 θ and show α-Fe
2o
3characteristic peak.
2. ferro manganese composite oxides catalyst according to claim 1, is characterized in that, ferro manganese composite oxides catalyst grain diameter is 1-3mm.
3. the preparation method of ferro manganese composite oxides catalyst according to claim 1, comprises step as follows:
1) get polyvinyl alcohol and add distilled water, heating stirring and dissolving, is cooled to room temperature, obtained poly-vinyl alcohol solution, and the addition of polyvinyl alcohol and the mass ratio of distilled water are 1:(8-12), unit: 100g/L;
2) poly-vinyl alcohol solution is added in copperas solution together with neopelex solution, magnetic agitation 1-2min, then add sodium carbonate liquor, obtained mixed solution;
The molar concentration of described neopelex solution is (0.1-0.3) mol/L, and the molar concentration of copperas solution is (1.1-1.5) mol/L, and the molar concentration of sodium carbonate liquor is (2-3) mol/L;
Poly-vinyl alcohol solution: neopelex solution: copperas solution: sodium carbonate liquor volume ratio is (3-7): (15-25): (20-40): (6-10);
3) get Natural Manganese iron ore and add step 2) in obtained mixed solution, stirring reaction 3-10h, adds Natural Manganese iron ore 200-400g in often liter of mixed solution; Reaction terminates rear separate solid particles, is dried by solid particle, then at 500-600 DEG C, calcines 2-4h, and cooling, obtains product.
4. the preparation method of ferro manganese composite oxides catalyst according to claim 3, it is characterized in that, step 1) in, the average degree of polymerization of polyvinyl alcohol is 1700 ~ 1800, the addition of polyvinyl alcohol and the mass ratio of distilled water are 1:5, unit: 100g/L.
5. the preparation method of ferro manganese composite oxides catalyst according to claim 3, is characterized in that, step 2) poly-vinyl alcohol solution: neopelex solution: copperas solution: sodium carbonate liquor volume ratio is 5:20:30:8.
6. the preparation method of ferro manganese composite oxides catalyst according to claim 3, is characterized in that, step 3) in calcining heat be 520-580 DEG C, calcination time 2-4h.
7. the preparation method of ferro manganese composite oxides catalyst according to claim 6, is characterized in that, calcining heat is 550 DEG C, calcination time 3h.
8. an application for ferro manganese composite oxides catalyst, described ferro manganese composite oxides catalyst is used for the paper waste depth degradation after biochemical treatment.
9. the application of ferro manganese composite oxides catalyst according to claim 8, is characterized in that, its embody rule method is as follows:
Ferro manganese composite oxides catalyst and hydrogen peroxide are added in pending waste water, pending waste water quality is: COD
cr≤ 500mg/L, SS≤100mg/L, colourity≤100; 20-40min is stirred under 20-30 DEG C of condition.
10. the application of ferro manganese composite oxides catalyst according to claim 9, it is characterized in that, the dosage of catalyst and the mass ratio of waste water are about 1:(10-40), described oxidant is the hydrogen peroxide of mass fraction 20-40%, and the volume ratio of hydrogen peroxide and waste water is 1:1000-1:3000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510540793.0A CN105107522B (en) | 2015-08-28 | 2015-08-28 | A kind of ferro manganese composite oxides catalyst and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510540793.0A CN105107522B (en) | 2015-08-28 | 2015-08-28 | A kind of ferro manganese composite oxides catalyst and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105107522A true CN105107522A (en) | 2015-12-02 |
| CN105107522B CN105107522B (en) | 2017-09-01 |
Family
ID=54655764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510540793.0A Active CN105107522B (en) | 2015-08-28 | 2015-08-28 | A kind of ferro manganese composite oxides catalyst and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105107522B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106423039A (en) * | 2016-11-17 | 2017-02-22 | 北京建筑大学 | Preparing method for granular iron-manganese composite oxide for repairing water heavy metal and phosphorus pollution |
| CN106630100A (en) * | 2016-12-30 | 2017-05-10 | 华中科技大学 | Landfill leachate treatment method, device and system |
| CN107376977A (en) * | 2017-09-19 | 2017-11-24 | 常州大学 | A kind of preparation method of N doping iron and manganese oxides |
| CN109364937A (en) * | 2018-09-25 | 2019-02-22 | 威水星空（北京）环境技术有限公司 | A kind of nanoporous crude boron stone load ferrimanganic composite depth processing catalyst for catalytic ozonation |
| CN109486495A (en) * | 2018-11-17 | 2019-03-19 | 长沙浩然医疗科技有限公司 | A kind of composition and preparation method thereof of recyclable solution soil contamination problem |
| CN110683993A (en) * | 2019-10-16 | 2020-01-14 | 黄冈师范学院 | Preparation method and application of ferrous phthalhydrazide |
| CN111151289A (en) * | 2019-12-25 | 2020-05-15 | 浙江工商大学 | Manganese-based bimetallic oxide mesoporous material and preparation and application thereof |
| CN112547086A (en) * | 2020-12-09 | 2021-03-26 | 威水星空（北京）环境技术有限公司 | Iron-manganese-boron porous microsphere catalyst and preparation method and application thereof |
| CN115487684A (en) * | 2022-09-27 | 2022-12-20 | 浙江理工大学 | Method for efficiently cleaning ceramic membrane |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111186896A (en) * | 2019-12-18 | 2020-05-22 | 中国环境科学研究院 | Method for degrading nitrobenzene wastewater by using natural iron-manganese mineral to catalyze double oxidants |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102895980A (en) * | 2012-11-02 | 2013-01-30 | 威水星空（北京）环境技术有限公司 | Ferro-chrome composite oxide and preparation method and application thereof |
| CN104209138A (en) * | 2014-09-04 | 2014-12-17 | 天津大学 | Fe-Mn double-metal heterogeneous Fenton catalyst taking molecular sieve as carrier as well as preparation method and application of catalyst |
-
2015
- 2015-08-28 CN CN201510540793.0A patent/CN105107522B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102895980A (en) * | 2012-11-02 | 2013-01-30 | 威水星空（北京）环境技术有限公司 | Ferro-chrome composite oxide and preparation method and application thereof |
| CN104209138A (en) * | 2014-09-04 | 2014-12-17 | 天津大学 | Fe-Mn double-metal heterogeneous Fenton catalyst taking molecular sieve as carrier as well as preparation method and application of catalyst |
Non-Patent Citations (1)
| Title |
|---|
| 查贤斌等: "铁矿石低温催化脱硝性能研究", 《工程热物理学报》 * |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106423039B (en) * | 2016-11-17 | 2018-11-06 | 北京建筑大学 | A kind of preparation method for repairing the particulate iron manganese composite oxide of heavy metal in water and phosphorus pollution |
| CN106423039A (en) * | 2016-11-17 | 2017-02-22 | 北京建筑大学 | Preparing method for granular iron-manganese composite oxide for repairing water heavy metal and phosphorus pollution |
| CN106630100B (en) * | 2016-12-30 | 2019-11-19 | 华中科技大学 | A kind of garbage percolation liquid treatment method, device and system |
| CN106630100A (en) * | 2016-12-30 | 2017-05-10 | 华中科技大学 | Landfill leachate treatment method, device and system |
| CN107376977A (en) * | 2017-09-19 | 2017-11-24 | 常州大学 | A kind of preparation method of N doping iron and manganese oxides |
| CN109364937A (en) * | 2018-09-25 | 2019-02-22 | 威水星空（北京）环境技术有限公司 | A kind of nanoporous crude boron stone load ferrimanganic composite depth processing catalyst for catalytic ozonation |
| CN109486495A (en) * | 2018-11-17 | 2019-03-19 | 长沙浩然医疗科技有限公司 | A kind of composition and preparation method thereof of recyclable solution soil contamination problem |
| CN110683993A (en) * | 2019-10-16 | 2020-01-14 | 黄冈师范学院 | Preparation method and application of ferrous phthalhydrazide |
| CN110683993B (en) * | 2019-10-16 | 2022-11-04 | 黄冈师范学院 | Preparation method and application of ferrous phthalhydrazide |
| CN111151289A (en) * | 2019-12-25 | 2020-05-15 | 浙江工商大学 | Manganese-based bimetallic oxide mesoporous material and preparation and application thereof |
| CN111151289B (en) * | 2019-12-25 | 2022-12-06 | 浙江工商大学 | Manganese-based bimetallic oxide mesoporous material and preparation and application thereof |
| CN112547086A (en) * | 2020-12-09 | 2021-03-26 | 威水星空（北京）环境技术有限公司 | Iron-manganese-boron porous microsphere catalyst and preparation method and application thereof |
| CN112547086B (en) * | 2020-12-09 | 2023-01-06 | 威水星空（北京）环境技术有限公司 | Iron-manganese-boron porous microsphere catalyst and preparation method and application thereof |
| CN115487684A (en) * | 2022-09-27 | 2022-12-20 | 浙江理工大学 | Method for efficiently cleaning ceramic membrane |
| CN115487684B (en) * | 2022-09-27 | 2024-04-05 | 浙江理工大学 | Method for efficiently cleaning ceramic membrane |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105107522B (en) | 2017-09-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105107522B (en) | A kind of ferro manganese composite oxides catalyst and preparation method thereof | |
| EP0323970B1 (en) | Sewage treatment | |
| CN102910793A (en) | Joint-conditioning dehydration method for sludge | |
| CN102464440B (en) | Method for carrying out decrement on physicochemical and biochemical mixed sludge | |
| CN112794555A (en) | Novel method for treating wastewater by reinforced coagulation | |
| CN108929022A (en) | A kind of processing method of sewage treatment plant excess sludge | |
| CN106587560B (en) | Novel application of short-term anaerobic digestion in sludge dewatering | |
| CN105254067B (en) | The resource utilization method of advanced treatment of wastewater Fenton process sludge | |
| CN105016569A (en) | Processing system and method for cold rolling reverse osmosis strong brine | |
| CN101525173B (en) | Oxygenation and dimethyl diallyl ammonium chloride composite modification silicoferrite coagulating agent and preparation method thereof | |
| CN108940184B (en) | Method for preparing magnetic adsorbent by taking iron sludge of underground water plant as raw material | |
| CN106430692A (en) | Chemical method for reducing COD (chemical oxygen demand) of wastewater based on oxidation method | |
| CN102863114B (en) | Deep treatment method for pulping papermaking wastewater | |
| CN113716665B (en) | Method for preparing flocculant by utilizing phosphorus-sulfur-containing strong-acid wastewater | |
| CN113087336B (en) | Method for treating sludge based on iron-based catalyst wet oxidation method | |
| CN101767809B (en) | Preparation method of high polymeric polyalumnium sulfa coagulant for strengthening coagulation of drinking water | |
| CN110171902A (en) | A kind of integrated conduct method of metronidazole waste water | |
| CN110668538B (en) | Preparation method of titanium polychloride | |
| CN108862845B (en) | Printing and dyeing wastewater treating agent, preparation method and treatment process thereof | |
| CN112479328A (en) | Preparation method of magnetic polyaluminum ferric silicate flocculant | |
| CN114477712A (en) | Green and efficient composite sludge dewatering process of natural polymeric flocculant and clay material | |
| CN102616997A (en) | Method for treating wastewater generated in production process of iron oxide pigment | |
| CN113117680A (en) | Nano ferrous metatitanate-silica gel particle Fenton catalyst, and preparation method and use method thereof | |
| CN109896656B (en) | Method for treating water chestnut starch processing wastewater | |
| CN110451729A (en) | A kind of processing method of high concentration organism P wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |