CN101700920A - Combined flocculating agent with controllable flocculation and using method thereof - Google Patents
Combined flocculating agent with controllable flocculation and using method thereof Download PDFInfo
- Publication number
- CN101700920A CN101700920A CN200910272639A CN200910272639A CN101700920A CN 101700920 A CN101700920 A CN 101700920A CN 200910272639 A CN200910272639 A CN 200910272639A CN 200910272639 A CN200910272639 A CN 200910272639A CN 101700920 A CN101700920 A CN 101700920A
- Authority
- CN
- China
- Prior art keywords
- flocculation
- natural polymer
- modified natural
- agent
- complexing agent
- 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.)
- Pending
Links
Abstract
The invention relates to a modified natural polymer combined flocculating agent and a using method thereof. The flocculating agent is the combination of modified natural polymer and complexing agent, wherein the modified natural polymer is prepared by carrying out phosphorylation modification, sulfonation modification or etherification modification on one or combination of two in shells of shelled animals such as shrimps, crabs and insects, cotton, straw, bagasse and starch; the complexing agent is combination of at least two in magnesium chloride, calcium chloride, sodium hydroxide, potassium hydroxide, aluminium chloride, aluminum sulfate, aluminium potassium sulfate, calcium oxide, sodium tetraborate, ferric chloride, ferrous sulfate, ferrous chloride, ferric sulfate, boric acid, hydrochloric acid and sulfuric acid. After the modified natural polymer is added, the complexing agent can be added into the natural polymer at any time within 12h according to the need of flocculation, and the flocculation reaction can be immediately finished. The invention has the advantages of controllable flocculation, rapid flocculation speed, large and firm flocculating body, low water content, safety, non-toxicity and wide temperature adaptation range.
Description
Technical field
The present invention relates to a kind of flocculation agent and using method that is used for water technology, be specifically related to a kind of modified natural polymer combined flocculating agent and using method.
Background technology
Flocculation process is one of most widely used general, the most general unit operation in the present lot of domestic and foreign water technology, is indispensable key link in the wastewater treatment process.The quality of flocculating effect has often determined operation conditions, final outflow water water quality and the expense of follow-up flow process, selects which kind of flocculation agent, for raising effluent quality, reduction water producing cost the important techniques economic worth is arranged.Objects of flocculation is lyophobic sol and the suspended particle that is formed by insoluble substance in the water, and flocculation agent is the core of flocculation process, and its performance directly has influence on the quality of flocculating effect.According to chemical composition, flocculation agent can be divided into inorganic salts flocculation agent, organic polymer coargulator and microbial flocculant.The flocculation agent that uses mainly is inorganic and organic two classes at present.Inorganic salts flocculation agent of less types mainly is low molecule salt and inorganic polymer flocculants such as aluminium salt, molysite, hydrating polymer.The dosage of inorganic flocculating agent is big, processing efficiency is low, the use of aluminium salt also has certain toxicity.Organic polymer coargulator mainly contains synthetic organic polymer coargulator and Modified Natural Organic Polymeric Flocculants.Organic polymer coargulator is compared with inorganic polymer flocculant, has that consumption is few, flocculation rate is fast, the salt pH value that coexisted and temperature effect are little, and it is few to generate sludge quantity, and characteristics such as easy processing, thereby wide application prospect is arranged.The organic polymer coargulator that uses mainly contains natural modified polymeric flocculant and synthetic polymeric flocculant two classes at present.The usage quantity of natural macromolecule flocculating agent is much smaller than the synthetic organic polymer flocculation agent, and reason is that its electric density is little, molecular weight is low, be easy to biological degradation takes place and lose flocculation activity.The synthetic organic polymer flocculation agent is because the constructional feature that molecular weight is big, molecular chain functional group is many has obtained application widely on the market at home and abroad, but because synthetic series polymeric flocculant price height, the toxicity of bio-refractory and residual monomer has limited it in food-processing, to the development of aspects such as water treatment and fermentation industry, in today of environmental protection pay attention to day by day, its research is not paid attention to by people.Since the seventies in 20th century, many countries begin to pay attention to the development of chemical modification organic polymer coargulator, this class flocculation agent can be divided into starch derivative, derivatived cellulose, chitin derivativ, vegetable jelly modified product, the protein-modified product of polyose etc. substantially by its raw material sources difference.Natural high moleculer eompound contains the various active group, as hydroxyl, phenolic hydroxyl group etc., has shown more active chemical property.Chemical modifications such as the esterification by hydroxyl, etherificate, oxidation, crosslinked, graft copolymerization, its active group increases greatly.Polymkeric substance becomes the cladodification structure, disperseed the flocculation group, particulate matter in the suspension system there are stronger seizure and promoter action, in order to improve the flocculating effect of this class material, people have carried out a large amount of study on the modification to it, natural macromolecule flocculating agent after modification is compared with the synthetic organic polymer flocculation agent, have that molecular weight is wide, active group is many, structure is diversified, raw material sources are extensive, cheap, be easy to advantages such as biological degradation, non-secondary pollution, be used for developing novel flocculant by the lot of domestic and foreign investigator at present.
Existing most flocculation agent or cost an arm and a leg or toxic or flocculation is slow or it is uncontrollable to flocculate or temperature influence is big or the residual sludge that produces and level of residue are big and be difficult to dispose easily causes secondary pollution.Therefore, develop low-cost, fast, efficient, safe, controlled, the thermal adaptation scope of flocculation is wide, the flocculation agent of readily biodegradable, non-secondary pollution, be of great practical significance.
Summary of the invention
The objective of the invention is to satisfy market to the environmental protection of flocculation agent and the requirement of flocculating effect, modified natural polymer is made up, a kind of controlled combined flocculating agent and using method of flocculating is provided in order to overcome the deficiency that existing flocculation agent exists.
Technical solution of the present invention is: a kind of combined flocculating agent with controllable flocculation, its component are modified natural polymer and complexing agent.
Described modified natural polymer can be after one or both combinations of substances in the agricultural wastes such as the shell, cotton, stalk, bagasse, starch of crustacean shrimp crab insect, to make the water-soluble natural polymer with active group through phosphorylation modification, sulfonated modification or carboxylic acid modification.
Described cotton is cotton, discarded cotton, discarded cotton-wool.
Described stalk is rice straw, straw, rape stalk, cotton stalk.
Described starch is W-Gum, tapioca (flour), sweet potato starch.
Described complexing agent can be at least two kinds combination in magnesium chloride, calcium chloride, sodium hydroxide, potassium hydroxide, aluminum chloride, Tai-Ace S 150, potassium aluminium sulfate, calcium oxide, sodium tetraborate, iron(ic) chloride, ferrous sulfate, iron protochloride, ferric sulfate, boric acid, hydrochloric acid, the sulfuric acid.
The using method of combined flocculation agent of the present invention is as follows:
1. with acid or alkali the pH of waste water is transferred to 4-8, optional hydrochloric acid of described acid or sulfuric acid, the optional calcium oxide of described alkali, sodium hydroxide or potassium hydroxide;
2. modified natural polymer and complexing agent are made into certain concentration solution respectively, modified natural polymer is made into 1-20g/L solution, and complexing agent is made into 1-100g/L solution, adds modified natural polymer 2-20g complexing agent 50-200g by waste water per ton;
3. add modified natural polymer, stirred 2-8 minute, be uniformly dispersed;
4. according to the flocculation needs, in 12 hours, add complexing agent at any time, can instantaneously finish flocculation reaction.
Principle of design of the present invention: modified natural polymer and complexing agent generation complex reaction and produce the flocculation phenomenon, reach the purpose of removing suspended substance and colloidalmaterial, be different from the traditional flocculant principle of design.
The invention has the beneficial effects as follows:
1. raw material sources are extensive, and are with low cost.
2. adopt modified natural polymer rather than synthetic organic polymer, readily biodegradable can not cause secondary pollution.
3. it is controlled to flocculate.Under the condition that modified natural polymer is not degraded, when add complexing agent, when flocculation reaction can be finished.
4. flocculation rate is fast, and the several seconds can produce flocculation.
5. flocs unit is big, solid, water ratio is low, helps follow-up processed.
6. therefore safety non-toxic can be used for the recovery of food, medicine nutritive ingredient.
7. thermal adaptation scope is wide, and flocculation reaction is temperature influence not substantially.
Embodiment
Embodiment 1
2g modified natural polymer and 10g complexing agent are dissolved in wiring solution-forming in the 1L distilled water respectively.Getting the 1L turbidity is that the 30NTU Yangtze River Water is in the 1L beaker, add the good modified natural polymer solution 10mL of dissolving, quick mechanical stirring 3 minutes (300r/min), then add the good complexing agent 10mL of dissolving, middling speed stirs 20 seconds (120r/min), produce a large amount of flocs unit particles, recording the supernatant liquor turbidity after 5 minutes is 0.5, and turbidity removal rate is 98.3%.
Embodiment 2
2g modified natural polymer and 10g complexing agent are dissolved in wiring solution-forming in the 1L distilled water respectively.Getting the 1L turbidity is that the 32NTU Yangtze River Water is in the 1L beaker, add the good modified natural polymer solution 5mL of dissolving, quick mechanical stirring 4 minutes (300r/min), then add the good complexing agent 10mL of dissolving, middling speed stirs 20 seconds (120r/min), produce a large amount of flocs unit particles, recording the supernatant liquor turbidity after 5 minutes is 3.0, and turbidity removal rate is 90.6%.
Embodiment 3
2g modified natural polymer and 10g complexing agent are dissolved in wiring solution-forming in the 1L distilled water respectively.Getting the 1L turbidity is that the 105NTU Kaolin clay suspension is in the 1L beaker, add the good modified natural polymer solution 8mL of dissolving, quick mechanical stirring 2 minutes (300r/min), then add the good complexing agent 12mL of dissolving, middling speed stirs 20 seconds (120r/min), produce a large amount of flocs unit particles, recording the supernatant liquor turbidity after 5 minutes is 1.5, and turbidity removal rate is 98.6%.
Embodiment 4
2g modified natural polymer and 10g complexing agent are dissolved in wiring solution-forming in the 1L distilled water respectively.Getting the 1L turbidity is that the 105NTU Kaolin clay suspension is in the 1L beaker, add the good modified natural polymer solution 20mL of dissolving, quick mechanical stirring 3 minutes (300r/min), then add the good complexing agent 12mL of dissolving, middling speed stirs 20 seconds (120r/min), produce a large amount of flocs unit particles, recording the supernatant liquor turbidity after 5 minutes is 0.5, and turbidity removal rate is 99.5%.
Embodiment 5
2g modified natural polymer and 10g complexing agent are dissolved in wiring solution-forming in the 1L distilled water respectively.Getting 1L frustule concentration is that 5 * 106cell/mL is in the 1L beaker, add the good modified natural polymer solution 15mL of dissolving, quick mechanical stirring 3 minutes (300r/min), then add the good complexing agent 20mL of dissolving, middling speed stirs 20 seconds (120r/min), produces a large amount of blue floc particles, measures supernatant liquor frustule concentration after 5 minutes, the frustule clearance is 95.5%, near going algae fully.
Embodiment 6
2g modified natural polymer and 10g complexing agent are dissolved in wiring solution-forming in the 1L distilled water respectively.Getting the 1L turbidity and be 3840mg/L, colourity 260, COD is that the 11120mg/L gourmet powder waste water is in the 1L beaker, with acid or alkali the pH value is transferred to 7.0, add the good modified natural polymer solution 20mL of dissolving, quick mechanical stirring 3 minutes (300r/min), then add the good complexing agent 20mL of dissolving, middling speed stirs 20 seconds (120r/min), produce the great quantity of floc particle, measure supernatant liquor turbidity, colourity and COD after 5 minutes, the clearance of turbidity, colourity and COD reaches 98.1%, 93.2% and 89.9% respectively.
Claims (5)
1. a combined flocculating agent with controllable flocculation is characterized in that flocculation agent is the combination of modified natural polymer and complexing agent.
2. a kind of combined flocculating agent with controllable flocculation as claimed in claim 1, it is characterized in that modified natural polymer be crustacean shrimp crab insect shell, cotton, stalk, bagasse, starch in after a kind of or two kinds of combinations, through phosphorylation modification, sulfonated modification or the etherification modified natural polymer that makes.
3. a kind of combined flocculating agent with controllable flocculation as claimed in claim 1 is characterized in that complexing agent is at least two kinds combination in magnesium chloride, calcium chloride, sodium hydroxide, potassium hydroxide, aluminum chloride, Tai-Ace S 150, potassium aluminium sulfate, calcium oxide, sodium tetraborate, iron(ic) chloride, ferrous sulfate, iron protochloride, ferric sulfate, boric acid, hydrochloric acid, the sulfuric acid.
4. the using method of a kind of combined flocculating agent with controllable flocculation as claimed in claim 1, its characterization step is:
1. with acid or alkali the pH of waste water is transferred to 4～8;
2. modified natural polymer and complexing agent are distinguished wiring solution-forming, and waste water per ton adds modified natural polymer 2～20g complexing agent 50～200g;
3. add modified natural polymer solution, stirred 2～8 minutes;
4. according to the flocculation needs, in 12 hours, add enveloping agent solution.
5. the using method of a kind of combined flocculating agent with controllable flocculation as claimed in claim 4 is characterized in that the strength of solution that modified natural polymer is made into is 1～20g/L, and the strength of solution that complexing agent is made into is 1～100g/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910272639A CN101700920A (en) | 2009-11-03 | 2009-11-03 | Combined flocculating agent with controllable flocculation and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910272639A CN101700920A (en) | 2009-11-03 | 2009-11-03 | Combined flocculating agent with controllable flocculation and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101700920A true CN101700920A (en) | 2010-05-05 |
Family
ID=42155853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910272639A Pending CN101700920A (en) | 2009-11-03 | 2009-11-03 | Combined flocculating agent with controllable flocculation and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101700920A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941784A (en) * | 2010-08-11 | 2011-01-12 | 中国水产科学研究院渔业机械仪器研究所 | Method for treating pond sludge by using sugarcane caudal lobes as coagulation aid |
| CN106830123A (en) * | 2017-03-09 | 2017-06-13 | 桂林融通科技有限公司 | A kind of agricultural chemicals waste water dephosphorization agent |
| CN107324589A (en) * | 2017-07-20 | 2017-11-07 | 同济大学 | A kind of processing method of sanitary sewage |
| CN108455805A (en) * | 2018-04-03 | 2018-08-28 | 晋州市大成变性淀粉有限公司 | A kind of preparation method of sludge recovery agent |
| CN111547935A (en) * | 2020-04-15 | 2020-08-18 | 浙江省海洋水产研究所 | Method for purifying pond culture seawater by using micro-plastic |
| CN114212863A (en) * | 2021-11-18 | 2022-03-22 | 岳阳亿德环保科技有限公司 | Nanometer composite COD (chemical oxygen demand) degrading agent for mineral processing wastewater |
| CN114380375A (en) * | 2022-01-19 | 2022-04-22 | 海南绿峰资源开发有限公司 | Preparation method of composite flocculant for treating tailings |
-
2009
- 2009-11-03 CN CN200910272639A patent/CN101700920A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941784A (en) * | 2010-08-11 | 2011-01-12 | 中国水产科学研究院渔业机械仪器研究所 | Method for treating pond sludge by using sugarcane caudal lobes as coagulation aid |
| CN106830123A (en) * | 2017-03-09 | 2017-06-13 | 桂林融通科技有限公司 | A kind of agricultural chemicals waste water dephosphorization agent |
| CN107324589A (en) * | 2017-07-20 | 2017-11-07 | 同济大学 | A kind of processing method of sanitary sewage |
| CN108455805A (en) * | 2018-04-03 | 2018-08-28 | 晋州市大成变性淀粉有限公司 | A kind of preparation method of sludge recovery agent |
| CN111547935A (en) * | 2020-04-15 | 2020-08-18 | 浙江省海洋水产研究所 | Method for purifying pond culture seawater by using micro-plastic |
| CN111547935B (en) * | 2020-04-15 | 2021-07-13 | 浙江省海洋水产研究所 | Method for purifying pond culture seawater by using micro-plastic |
| CN114212863A (en) * | 2021-11-18 | 2022-03-22 | 岳阳亿德环保科技有限公司 | Nanometer composite COD (chemical oxygen demand) degrading agent for mineral processing wastewater |
| CN114380375A (en) * | 2022-01-19 | 2022-04-22 | 海南绿峰资源开发有限公司 | Preparation method of composite flocculant for treating tailings |
| CN114380375B (en) * | 2022-01-19 | 2023-11-21 | 海南绿峰资源开发有限公司 | Preparation method of composite flocculant for treating tailings |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101700920A (en) | Combined flocculating agent with controllable flocculation and using method thereof | |
| Teh et al. | Recent advancement of coagulation–flocculation and its application in wastewater treatment | |
| Jiang et al. | Biopolymer-based flocculants: A review of recent technologies | |
| CN101880356B (en) | Preparation method of grafting amphoteric chitosan flocculant | |
| CN105439270B (en) | A kind of Moringa oleifera flocculant particle and its production and use | |
| Abdo et al. | Cationic starch and polyaluminum chloride as coagulants for River Nile water treatment | |
| CN102276037A (en) | Method for preparing environment-friendly and efficient composite flocculant | |
| Ferasat et al. | Natural polymer matrix as safe flocculant to remove turbidity from kaolin suspension: Performance and governing mechanism | |
| CN105692850B (en) | A kind of preparation method of water process banana skin high-molecular coagulant adopting | |
| CN104671367A (en) | Algaecide for effectively removing algae and precipitating alga bodies | |
| CN101219828B (en) | Blue algae water bloom bioflocculation agent and production | |
| CN101838040A (en) | Method for purifying seawater by taking carboxymethyl chitosan as flocculant | |
| CN104556334A (en) | Efficient multifunctional slow-release flocculating agent and preparation method thereof | |
| CN102020750B (en) | Composite flocculating agent and preparation method thereof | |
| CN100406396C (en) | Composite flocculant for water treatment and its prepn process | |
| CN104448338A (en) | Preparation method of lignin xanthate | |
| CN100343180C (en) | Chitin/chitosan water processing flocculating agent and its preparing method | |
| CN109678235A (en) | A kind of natural zwitterion compound sewage flocculant for treating and its application method | |
| CN102358639A (en) | Method for processing waste liquid containing calcium citrate | |
| CN102285709B (en) | Preparation method for ecological high-efficient complex flocculating agent | |
| CN100390076C (en) | Preparation method of chitin-alginic acid copolymer flocculant | |
| CN109319899A (en) | A kind of preparation method of environment friendly biological base flocculant | |
| CN1119294C (en) | Method for preparing flocculent for treatment of chitosan water | |
| JP2001129310A (en) | Flocculant and sludge treatment method | |
| CN102487964B (en) | Bacteriostat for secondary breeding bacteria, preparation method thereof and purifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100505 |