CN105502614A - Preparation method of novel rapid-sedimentation environment-friendly type flocculating agent - Google Patents
Preparation method of novel rapid-sedimentation environment-friendly type flocculating agent Download PDFInfo
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- CN105502614A CN105502614A CN201610091062.7A CN201610091062A CN105502614A CN 105502614 A CN105502614 A CN 105502614A CN 201610091062 A CN201610091062 A CN 201610091062A CN 105502614 A CN105502614 A CN 105502614A
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- sweet potato
- potato starch
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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
- 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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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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
- 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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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention relates to a preparation method of a novel rapid-sedimentation environment-friendly type flocculating agent. According to the preparation method, starch milk is subjected to modification treatment at the sweet potato starch processing stage, and meanwhile the processing conditions at the later stage are controlled, so that an obtained flocculating agent solution has the advantages of being high in sedimentation speed, high in environmental protection performance and wide in application scope, the concentration of total solute in waste water obtained after treatment is 21-26.2 mg/L, the concentration of total suspended matter is 1.2-1.5 mg/L, the BOD drop rate is 87-92%, the COD drop rate is 83.7-85.6%, and the pollutant removal rate is 88.3-92.1%.
Description
Technical field
The present invention relates to a kind of preparation method of novel rapid subsidence environment-friendly type flocculation agent.
Background technology
Along with the surge of population and the development of modern industrial or agricultural, water consumption sharply increases in recent years.Especially industrial expansion, needs a large amount of process waters, and the trade effluent then produced also grows with each passing day, thus accelerates the pollution of water.How cheap effectively disposing of sewage has become the task of top priority.Flocculation sedimentation is a kind of not only economy but also easy water conditioning method that generally use at present both at home and abroad, but along with the increase of water pollutions, simple inorganic salt flocculation agent can not meet the needs of present water treatment.
Number of patent application 200810118484.4, disclose a kind of composite flocculation agent for the treatment of municipal effluent, the component of composite flocculation agent is diatomite and polymerize aluminum chloride (PAC), and both weight ratios are diatomite: polymerize aluminum chloride is 50-100:10-20.Diatomite adsorption is strong, and all have good absorption property to COD, BOD, SS, total phosphorus, adding polymerize aluminum chloride can produce a large amount of floc particles in waste water solution, reduces the colourity of water body.
Number of patent application 201210192293.9, discloses a kind of flocculation agent of sewage disposal, and it is with polypropylene phthalein amine, starch, clorox, Xylo-Mucine, water glass, Potassium Persulphate, S-WAT and water for raw material, through being composited.There is environmental protection, cost is low, and adding less, and flocculation rate is fast, and mud is few; The advantage such as easy to use, safe.
Number of patent application 201510127194.6, disclose a kind of starch flocculant and its preparation method and application, it is obtained by starch and acrylic amide graft copolymerization, described starch is pea starch, glutinous rice starch, W-Gum, yam starch, sweet potato starch, be preferably pea starch, the mass ratio of starch and acrylamide is 1:1 ~ 1:3.
Number of patent application 201510396253.X, disclose a kind of environment-friendly type cationic starch flocculant and preparation method thereof, environment-friendly type cationic starch flocculant of the present invention is that raw material is prepared from waxy corn starch, cationic starch flocculant substitution value DS >=0.45 of gained, have the easy gelatinization of cold water, transparent and stable and in water good dispersity, there is the advantages such as extremely strong positive charge performance, to anionic impurity all kinds of in sewage, there is good flocculating effect.Above preparation method, makes water treatment effect and cost improve, but needs to further improve in sewage decoloring effect, COD clearance etc.
Summary of the invention
The present invention proposes a kind of preparation method of novel rapid subsidence environment-friendly type flocculation agent.
Technical scheme of the present invention is achieved in that a kind of preparation method of novel rapid subsidence environment-friendly type flocculation agent, it is characterized in that, comprises the following steps:
1. by fresh Ipomoea batatas according to washing, broken, grind, filter, convert slurry, skim cylinder, sit cylinder, skim starch, sieve, a powder, bull ladle, drying step be processed into sweet potato starch;
2. getting the sweet potato starch 20g that 1. step obtain adds in reactor, control temperature 30-42 DEG C, adds sweet potato starch quality 9-12 water doubly while stirring, stir 25-35min, make the abundant gelatinization of sweet potato starch in reactor; Then in the sweet potato starch of abundant gelatinization, drip the sulfuric acid that concentration is 15%, carry out pH value adjustment to sweet potato starch, the consumption of sulfuric acid is the 5-10% of sweet potato starch quality;
3. in another reactor, add diatomite, then add diatomite quality 6-10 times water, controlling stirring velocity is 150 ~ 200 revs/min, stirs 15min;
4. pour in flask after bodied ferric sulfate, poly-aluminum chloride-magnesium, ferrous sulfate and magnesium chloride four kinds of materials being mixed according to the ratio of 1:2:4:3, and flask is placed in thermostat water bath, control temperature 20-25 DEG C, then the tripolite solution of the sweet potato starch 2. processed through step and step 3. stir process is added in flask simultaneously, control rotating speed is 80-100 rev/min, stir 2-3h, obtain flocculant solution.
As preferred technical scheme, step 1. in slurry of converting be operating as in the starch milk obtained to filtration and add sodium hydroxide while stirring, control temperature 25 DEG C, modification is carried out to starch milk, the mass ratio 6-9:1 of starch milk and sodium hydroxide, then pours in pretipitatin jar by the starch milk through modification, adds acidity and the concentration of large slurry and water adjustment starch milk immediately in proportion, after fully stirring with wooden stick, it is made to staticly settle.
As preferred technical scheme, step 4. in the blending ratio of bodied ferric sulfate, poly-aluminum chloride-magnesium, ferrous sulfate and magnesium chloride four kinds of things be 1.5:2:4.5:2.
Owing to have employed technique scheme, the present invention has following outstanding beneficial effect:
The present invention is by just carrying out modification to starch milk in the sweet potato starch process segment, simultaneously by controlling post-production condition, the flocculant solution obtained is made to have settling velocity fast, environmental-protecting performance is high, feature applied widely, and the waste water total soluble matter concentration after process is 21 ~ 26.2mg/L, total suspended matter is 1.2 ~ 1.5mg/L, BOD rate of descent is 87% ~ 92%, COD rate of descent is 83.7% ~ 85.6%, and pollutants removal rate is 88.3% ~ 92.1%.
Embodiment
Be clearly and completely described to the technical scheme in the embodiment of the present invention below, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The invention provides a kind of preparation method of novel rapid subsidence environment-friendly type flocculation agent, comprise the following steps:
1. by fresh Ipomoea batatas according to washing, broken, grind, filter, convert slurry, skim cylinder, sit cylinder, skim starch, sieve, a powder, bull ladle, drying step be processed into sweet potato starch;
2. getting the sweet potato starch 20g that 1. step obtain adds in reactor, control temperature 30-42 DEG C, adds sweet potato starch quality 9-12 water doubly while stirring, stir 25-35min, make the abundant gelatinization of sweet potato starch in reactor; Then in the sweet potato starch of abundant gelatinization, drip the sulfuric acid that concentration is 15%, carry out pH value adjustment to sweet potato starch, the consumption of sulfuric acid is the 5-10% of sweet potato starch quality;
3. in another reactor, add diatomite, then add diatomite quality 6-10 times water, controlling stirring velocity is 150 ~ 200 revs/min, stirs 15min;
4. pour in flask after bodied ferric sulfate, poly-aluminum chloride-magnesium, ferrous sulfate and magnesium chloride four kinds of materials being mixed according to the ratio of 1:2:4:3, and flask is placed in thermostat water bath, control temperature 20-25 DEG C, then the tripolite solution of the sweet potato starch 2. processed through step and step 3. stir process is added in flask simultaneously, control rotating speed is 80-100 rev/min, stir 2-3h, obtain flocculant solution.
Above-mentioned steps 1. in slurry of converting be operating as in the starch milk obtained to filtration and add sodium hydroxide while stirring, control temperature 25 DEG C, modification is carried out to starch milk, the mass ratio 6-9:1 of starch milk and sodium hydroxide, then the starch milk through modification is poured in pretipitatin jar, add acidity and the concentration of large slurry and water adjustment starch milk immediately in proportion, after fully stirring with wooden stick, make it staticly settle.
Above-mentioned steps 4. in the blending ratio of bodied ferric sulfate, poly-aluminum chloride-magnesium, ferrous sulfate and magnesium chloride four kinds of things be 1.5:2:4.5:2.
Embodiment 1:
By fresh Ipomoea batatas according to washing, broken, grind, filter, convert slurry, skim cylinder, sit cylinder, skim starch, sieve, a powder, bull ladle, drying step be processed into sweet potato starch.Wherein add sodium hydroxide while stirring in the starch milk that obtains to filtration converting in slurry operating process, control temperature 25 DEG C, modification is carried out to starch milk, the mass ratio 7:1 of starch milk and sodium hydroxide, then the starch milk through modification is poured in pretipitatin jar, add acidity and the concentration of large slurry and water adjustment starch milk immediately in proportion, after fully stirring with wooden stick, make it staticly settle.Obtained sweet potato starch 20g is added in reactor, control temperature 30 DEG C, in reactor, add the water of sweet potato starch quality 12 times while stirring, stir 30min, make the abundant gelatinization of sweet potato starch; Then in the sweet potato starch of abundant gelatinization, drip the sulfuric acid that concentration is 15%, carry out pH value adjustment to sweet potato starch, the consumption of sulfuric acid is 8% of sweet potato starch quality.In another reactor, add diatomite, then add the water of diatomite quality 8 times, controlling stirring velocity is 150 revs/min, stirs 15min.Pour in flask after bodied ferric sulfate, poly-aluminum chloride-magnesium, ferrous sulfate and magnesium chloride four kinds of materials are mixed according to the ratio of 1:2:4:3, and flask is placed in thermostat water bath, control temperature 20 DEG C, then the tripolite solution of the sweet potato starch 2. processed through step and step 3. stir process is added in flask simultaneously, controlling rotating speed is 80 revs/min, stir 2-3h, obtain flocculant solution.
Embodiment 2:
Difference from Example 1 is, when being added in reactor by obtained sweet potato starch 20g, control temperature is 42 DEG C.Other conditions are identical with embodiment 1.
Embodiment 3:
Difference from Example 1 is, when being added in reactor by obtained sweet potato starch 20g, control temperature is 38 DEG C.Other conditions are identical with embodiment 1.
Embodiment 4:
Difference from Example 1 is, flask is placed in thermostat water bath, control temperature 25 DEG C.Other conditions are identical with embodiment 1.
Embodiment 5:
Difference from Example 1 is, added in flask by the tripolite solution of the sweet potato starch 2. processed through step and step 3. stir process, controlling rotating speed is 100 revs/min simultaneously.Other conditions are identical with embodiment 1.
Reference examples 1:
Difference from Example 1 is, add sodium hydroxide while stirring in the starch milk that obtains to filtration converting in slurry operating process, control temperature is 30 DEG C.Other conditions are identical with embodiment 1.
Reference examples 2:
Difference from Example 1 is, when being added in reactor by obtained sweet potato starch 20g, control temperature is 47 DEG C.Other conditions are identical with embodiment 1.
Reference examples 3:
Difference from Example 1 is, flask is placed in thermostat water bath, control temperature 30 DEG C.Other conditions are identical with embodiment 1.
Reference examples 4:
Difference from Example 1 is, flask is placed in thermostat water bath, control temperature 15 DEG C.Other conditions are identical with embodiment 1.
Reference examples 5:
Difference from Example 1 is, will add in flask time different for the tripolite solution of the sweet potato starch 2. processed through step and step 3. stir process, controlling rotating speed be 80 revs/min.Other conditions are identical with embodiment 1.
Reference examples 6:
Difference from Example 1 is, added in flask by the tripolite solution of the sweet potato starch 2. processed through step and step 3. stir process, controlling rotating speed is 120 revs/min simultaneously.Other conditions are identical with embodiment 1.
Reference examples 7:
By fresh Ipomoea batatas according to washing, broken, grind, filter, convert slurry, skim cylinder, sit cylinder, skim starch, sieve, a powder, bull ladle, drying step be processed into sweet potato starch.Wherein modification is not carried out to starch milk converting in slurry operating process, but directly starch milk is poured in pretipitatin jar, add acidity and concentration that large slurry and water adjust starch milk immediately in proportion, after fully stirring with wooden stick, make it staticly settle.Obtained sweet potato starch 20g is added in reactor, control temperature 30 DEG C, in reactor, add the water of sweet potato starch quality 12 times while stirring, stir 30min, make the abundant gelatinization of sweet potato starch; Then in the sweet potato starch of abundant gelatinization, sodium hydroxide is added while stirring, control temperature 25 DEG C, modification is carried out to starch milk, the mass ratio 7:1 of starch milk and sodium hydroxide, then dripping concentration is the sulfuric acid of 15%, carry out pH value adjustment to sweet potato starch, the consumption of sulfuric acid is 8% of sweet potato starch quality.In another reactor, add diatomite, then add the water of diatomite quality 8 times, controlling stirring velocity is 150 revs/min, stirs 15min.Pour in flask after bodied ferric sulfate, poly-aluminum chloride-magnesium, ferrous sulfate and magnesium chloride four kinds of materials are mixed according to the ratio of 1:2:4:3, and flask is placed in thermostat water bath, control temperature 20 DEG C, then the tripolite solution of the sweet potato starch 2. processed through step and step 3. stir process is added in flask simultaneously, controlling rotating speed is 80 revs/min, stir 2-3h, obtain flocculant solution.
Embodiment 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5, reference examples 1, reference examples 2, reference examples 3, reference examples 4, reference examples 5, reference examples 6 and reference examples 7 are processed the finished product flocculant solution obtained to join respectively in the sewage of the identical water quality of same volume and carry out sewage disposal, obtain test result as shown in Table 1.
Table one:
Can be found by the data of table one gained, embodiment 2 and embodiment 3 difference from Example 1 are, change control temperature when being added in reactor by obtained sweet potato starch 20g, and temperature control within the scope of 30-42 DEG C.Embodiment 4 difference from Example 1 is, change control temperature when flask being placed in thermostat water bath, and temperature controls within the scope of 20-25 DEG C.Embodiment 5 difference from Example 1 is, changes rotating speed, and rotating speed controls within the scope of 80-100 rev/min.Waste water total soluble matter concentration (mg/l) after 5 five the embodiment process of embodiment 1-embodiment maintains lower scope, illustrates that the foreign matter content in water is little; Total suspended matter (mg/l) maintains lower scope.BOD rate of descent (%) maintains higher scope, and its value higher explanation organic pollutants matter is fewer, pollutes also lighter.COD rate of descent (%) maintains higher scope, and its value higher explanation water pollution degree is lighter.Pollutants removal rate (%) maintains higher scope, illustrates that the remaining quantity of pollutent is fewer.
Reference examples 1 is relative to embodiment 1 difference, changes temperature when converting and adding sodium hydroxide while stirring in the starch milk that obtains to filtration in slurry operating process, reference examples 1 after tested five indices all lower than embodiment 1.Reference examples 2 difference from Example 1 is, temperature is changed when being added in reactor by obtained sweet potato starch 20g, and temperature is beyond 30-42 DEG C of scope, five indices is all lower than embodiment 1 after tested for reference examples 2, and five indices is lower than embodiment 2 and embodiment 3.Reference examples 3 and reference examples 4 difference from Example 1 are, temperature is changed when flask being placed in thermostat water bath, and temperature is beyond 20-25 DEG C of scope, five indices is all lower than embodiment 1 after tested for reference examples 3 and reference examples 4, and five indices is lower than embodiment 4.Reference examples 5 difference from Example 1 is, the mode in flask is added when adopting different by the tripolite solution of the sweet potato starch 2. processed through step and step 3. stir process, reference examples 5 after tested five indices all lower than embodiment 1, and decline comparatively obvious.Reference examples 6 difference from Example 1 is, changes rotating speed, and rotating speed exceeds within the scope of 80-100 rev/min, and five indices is all lower than embodiment 1 after tested for reference examples 6, and five indices is lower than embodiment 5.Reference examples 7 difference from Example 1 is, adopt and be first processed into sweet potato starch, carrying out modification to finished product sweet potato starch, other conditions are identical with embodiment 1, reference examples 7 after tested five indices, all lower than embodiment 1, and declines the most obvious relative to all reference examples.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. a preparation method for novel rapid subsidence environment-friendly type flocculation agent, is characterized in that, comprise the following steps:
1. by fresh Ipomoea batatas according to washing, broken, grind, filter, convert slurry, skim cylinder, sit cylinder, skim starch, sieve, a powder, bull ladle, drying step be processed into sweet potato starch;
2. getting the sweet potato starch 20g that 1. step obtain adds in reactor, control temperature 30-42 DEG C, adds sweet potato starch quality 9-12 water doubly while stirring, stir 25-35min, make the abundant gelatinization of sweet potato starch in reactor; Then in the sweet potato starch of abundant gelatinization, drip the sulfuric acid that concentration is 15%, carry out pH value adjustment to sweet potato starch, the consumption of sulfuric acid is the 5-10% of sweet potato starch quality;
3. in another reactor, add diatomite, then add diatomite quality 6-10 times water, controlling stirring velocity is 150 ~ 200 revs/min, stirs 15min;
4. pour in flask after bodied ferric sulfate, poly-aluminum chloride-magnesium, ferrous sulfate and magnesium chloride four kinds of materials being mixed according to the ratio of 1:2:4:3, and flask is placed in thermostat water bath, control temperature 20-25 DEG C, then the tripolite solution of the sweet potato starch 2. processed through step and step 3. stir process is added in flask simultaneously, control rotating speed is 80-100 rev/min, stir 2-3h, obtain flocculant solution.
2. the preparation method of a kind of novel rapid subsidence environment-friendly type flocculation agent according to claim 1, it is characterized in that: step 1. in slurry of converting be operating as in the starch milk obtained to filtration and add sodium hydroxide while stirring, control temperature 25 DEG C, modification is carried out to starch milk, the mass ratio 6-9:1 of starch milk and sodium hydroxide, then the starch milk through modification is poured in pretipitatin jar, add acidity and the concentration of large slurry and water adjustment starch milk immediately in proportion, after fully stirring with wooden stick, it is made to staticly settle.
3. the preparation method of a kind of novel rapid subsidence environment-friendly type flocculation agent according to claim 1, is characterized in that: step 4. in the blending ratio of bodied ferric sulfate, poly-aluminum chloride-magnesium, ferrous sulfate and magnesium chloride four kinds of things be 1.5:2:4.5:2.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111233115A (en) * | 2020-02-11 | 2020-06-05 | 江西众安职业危害评价检测有限公司 | Flocculating agent for sewage treatment, preparation method thereof and sewage sedimentation method |
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| CN101531413A (en) * | 2008-03-16 | 2009-09-16 | 吴全环 | Novel compositing and flocculating method for environment-friendly compound flocculating agent |
| CN101327976B (en) * | 2008-07-15 | 2012-01-25 | 南通立源水业科技发展有限公司 | Efficient water treatment flocculant |
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2016
- 2016-02-18 CN CN201610091062.7A patent/CN105502614A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101531413A (en) * | 2008-03-16 | 2009-09-16 | 吴全环 | Novel compositing and flocculating method for environment-friendly compound flocculating agent |
| CN101327976B (en) * | 2008-07-15 | 2012-01-25 | 南通立源水业科技发展有限公司 | Efficient water treatment flocculant |
Non-Patent Citations (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111233115A (en) * | 2020-02-11 | 2020-06-05 | 江西众安职业危害评价检测有限公司 | Flocculating agent for sewage treatment, preparation method thereof and sewage sedimentation method |
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Application publication date: 20160420 |