KR20140105289A - Manufacturing Methods of Coagulant for Water and Wastewater Treatment and Coagulant Thereby - Google Patents
Manufacturing Methods of Coagulant for Water and Wastewater Treatment and Coagulant Thereby Download PDFInfo
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- KR20140105289A KR20140105289A KR1020130019357A KR20130019357A KR20140105289A KR 20140105289 A KR20140105289 A KR 20140105289A KR 1020130019357 A KR1020130019357 A KR 1020130019357A KR 20130019357 A KR20130019357 A KR 20130019357A KR 20140105289 A KR20140105289 A KR 20140105289A
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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
- C02F1/5263—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using natural chemical 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
- 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
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Abstract
Description
The present invention relates to a method for producing a flocculant for the treatment of water or wastewater, and a flocculant prepared by the method.
Moringa (Moringaceae) and crop is know as the African wooden native to tropical or subtropical agglomerated active proteins Republic of Korea Patent Publication No. (date), the number 10-2010-0102518 "coagulation and antibiotic-inorganic composite material for and a method of manufacturing the same And Korean Patent Laid-Open No. 10-2010-0102519 entitled " Emergency water tea bag and its manufacturing method ".
Moringa has cohesive activity Olay Blow (Moringa olefera ) seeds, as disclosed in the above document, is an amphoteric substance containing various kinds of amino acids. In the neutralization reaction with all the acid bases, when alkali is added, hydrogen ions are lost and -COOH The neutralization reaction in which H + at the base is reacted with OH - of the base takes place, and a neutralization reaction in which NH 3 Cl is produced by reaction of -NH 2 with an acid such as HCl occurs It is amphoteric. Unlike other types of coagulants, it is a natural peptide of 14 kDa or less composed of 16 kinds of complex amino acids reacting regardless of the pH of wastewater. It can adsorb and crosslink regardless of the polarity of colloidal contaminants that are safely dissolved in water. , And trapped in reticulate structures and not affecting the pH of the treated water.
Moringa In the process of extracting polypeptides which are natural polymers of oleafella seeds, they have to be subjected to a microfiltration process for separating pure proteins after the salting process. Thus, they are greatly restricted in commercialization because they are expensive. However, Unlike amphoteric substances, which have both positive and negative ionicity, biodegradable proteins that do not affect the pH of raw water or treated water have little environmental toxicity.
Aluminum sulphate is the most widely used coagulant due to its excellent flocculation characteristics, mass productivity and economy.
The molecular formula of aluminum sulfate (alum sulfate or alum) is Al 2 (SO 4 ) 3 , which removes colloidal particles such as mud particles, organic matter, bacteria, microalgae, pigment, heavy metals or organic contaminants contained in surface waters and various wastewater. And it is most widely used for wastewater treatment and water treatment, and is also widely used in the paper industry.
In addition, aluminum sulfate is a non-volatile, colorless, white crystalline material. It is a strongly acidic substance with hygroscopicity that absorbs and immobilizes water molecules in the solid state. It has a crystal number of water molecules and is composed of Al 2 (SO 4 ) 3 nH 2 O, and 14-16 molecules are being produced on the market. The design criteria and coagulation performance of almost all of the flocculation and sedimentation treatment processes have been studied on the basis of the data of flocculation and sedimentation treatment using aluminum sulfate.
Aluminum sulphate is initially produced by reacting with raw materials such as clay, alumina debris, alunite or bauxite, and sulfuric acid, and then through complicated processes such as filtration, decolorization and concentration, Aluminum hydroxide is reacted with sulfuric acid to make it easily.
Aluminum sulphate is supplied in strongly acidic powder and liquid phase, usually solid phase is 14-17% with Al 2 O 3 (alumina) and mixed with water just before use to make liquid product containing 7 ~ 8% alumina use.
The selectively used polyacrylamide polymer has a cohesive force for binding fine particles suspended and dispersed in water and has a molecular weight (10.000 to 20,000) as a polymer and has a strong negative charge-absorbing functional group And it is difficult to dissolve, so that the dissolution concentration should be reduced to about 0.01-0.2% to sufficiently dissolve.
According to the report, we found more than a certain concentration of aluminum in brain cells of patients with dementia. Along with the appearance of nuclear magnetic resonance apparatus, in general, aluminum is a typical substance accumulated in nerve cells in animal experiments. Is known to cause symptoms such as memory loss and seizures. In addition, older adults with a high intake of aluminum have a 2.26-fold higher risk of dementia than those without, and the researchers report that cognitive impairment can precede dementia if daily intake of aluminum is more than 1 mg Alzheimer's disease or cognitive decline: findings from 15-year follow-up of the PAQUID cohort, Am J Epidemiol 169 (4): 48996).
In Korea (Hanyang University College of Medicine neurology), when we examine patients with senile dementia, the level of heavy metals such as aluminum is higher than that of normal people. Therefore, it is assumed that the risk of dementia (99%) is released as it is in the body (based on the Korean food standard: less than 0.2 mg per 1 liter of aluminum). However, as the amount of aluminum in the body increases, it can cause problems such as cognitive ability The American Journal of Epidemiology , Kim and al., Hanyang Univ (2011))
Also, recycling the sludge produced by the treatment with coagulant containing high concentration of alumina such as aluminum sulphate can cause a serious obstacle to the growth of all grains including wheat, corn, and barley. Aluminum toxicity is known to be a major impediment to plant growth in about 20% of the world's arable land (http://bric.postech.ac.kr/trend/news/kisti_print.php?id=140589).
Thus, Moringa There is a need for a process for the production of a novel coagulant that can economically improve the process of extracting peptides and / or polypeptides, which are natural polymer flocculants, from oleafella seeds, as well as dramatically reducing the residual amount of flocculants containing aluminum.
Numerous papers and patent documents are referenced and cited throughout this specification. The disclosures of the cited papers and patent documents are incorporated herein by reference in their entirety to better understand the state of the art to which the present invention pertains and the content of the present invention.
The present inventors have made extensive efforts to develop a new method for producing a coagulant that can significantly reduce the concentration of aluminum in treated water or residual aluminum in precipitated sludge compared to a flocculant containing aluminum. As a result, Moringa Olay Pera By using a peptide and / or polypeptide separate microfiltration process aluminum salt aqueous solution and a polyacrylamide-based polymer solution without the protein polymer for separating the protein polymer aqueous solution containing the extract from the seeds, Moringa Olay Pera It is possible to economically separate the natural polymer flocculant from the seed and to produce a novel flocculant which can significantly reduce the residual aluminum concentration compared to the flocculant containing aluminum.
Accordingly, an object of the present invention is to provide a process for producing a flocculant for treating water or wastewater.
Another object of the present invention is to provide a coagulant produced by the above-mentioned method for producing coagulant for treating water or wastewater.
Other objects and advantages of the present invention will become more apparent from the following detailed description of the invention, claims and drawings.
In accordance with one aspect of the present invention, the present invention provides the following constant or to and coagulant production method for waste water treatment comprising the steps of: (a) Moringa Olay Blow (Moringa oleifera) peptides, poly extracted from seeds Preparing a protein aqueous polymer solution comprising a peptide or a peptide and a polypeptide; (b) adding an aqueous aluminum salt solution to the protein aqueous polymer solution prepared in (a) at a concentration of 10-80% based on the volume of the aqueous polymeric protein solution to prepare an aqueous mixture solution; And (c) adding a polyacrylamide polymer aqueous solution to the aqueous solution of the mixture prepared in (b) at a concentration of 0.01-10% based on the volume of the aqueous polymer solution, to prepare a flocculant for treating water or wastewater.
According to another aspect of the present invention, there is provided a flocculant for the treatment of purified water or lower wastewater, which is produced by the above-described method for producing flocculant for treating water or wastewater.
The invention Manly Mo Olay Pera By mixing an aluminum salt aqueous solution and a polyacrylamide-based polymer solution to the peptide and / or protein aqueous polymer solution containing the polypeptide is extracted from seeds, Moringa Olay Pera The present invention relates to a method for producing a coagulant for treating water or wastewater, which not only economically separates a natural polymer flocculant from a seed but also exhibits an effect of remarkably reducing the residual aluminum concentration compared to a flocculant containing aluminum.
Particularly, when a flocculant containing aluminum is used, flocculation hardly occurs at low temperature (below 20 ° C), and thus it is difficult to use in the winter season. However, the flocculant for treating purified water or wastewater according to the present invention has low temperature (See Example 2 of the present invention).
According to a preferred embodiment of the present invention, the flocculant for treating purified water or wastewater according to the present invention has flocculation activity at 0-20 ° C, more preferably 1-10 ° C, even more preferably 0- And has a flocculating activity at 5 占 폚.
The method for producing the coagulant for treating water or wastewater according to the present invention will be described step by step with reference to the following examples. If it is a means for a person skilled in the art to exhibit an equivalent effect other than the manufacturing method described in the following description It is obvious that it can be used without limitation.
Peptide and / or polypeptide to be used in step (a) of the present invention, the parent Manly But can be extracted in a number of ways known to one skilled in the art from the Olay Blow seeds, Moringa, if the present invention, to extract the peptide and / or polypeptide Olay Pera It is preferable that the seeds are made into a defatted oil cake from which fine powder or oil has been removed and then extracted.
Specifically, in order to increase the solubility of the protein , Moringa It is preferable to use a fine powder of oleafella seed. In order to prepare a fine powder (or oil-free oil cake), it is preferable to add water 1-2 times in weight ratio and then pulverize using a pulverizer.
According to a preferred embodiment of the present invention, the peptide or polypeptide in step (a) of the present invention is a peptide or a polypeptide extracted from the moringa oleipera seed powder, more preferably a moringa oleipera seed degreasing fine powder Lt; RTI ID = 0.0 > and / or < / RTI >
When preparing the coagulant using a production method of the present invention, it is Manly base when used in applications such as reservoir algae removal of the pollution load small low-density It is preferable to use 10 g / l or less of the oleic acid seed powder, while 15-20 g / l is preferably used for the high concentration organic wastewater with a large pollution load.
According to a preferred embodiment system of the present invention, the method in the present invention (a) is Moringa And dissolving 1-40 g of the oleyl peracetate seed powder in an aqueous 0.01-10 molar salt solution to prepare an aqueous solution of the protein polymer.
Moringa When the oleic acid seed fine powder is added to 1 L dH 2 O in which 0.01-10 mol of salt is dissolved, the weight of the added fine powder is preferably 1-40 g. More preferably, the parent Manly By weight of Olay Blow seed fine powder is 5-30 g, and more preferably 15-20 g more.
In the present specification, the term " aqueous solution of salt " means a liquid in which a compound, which is an ionic substance in which anion and base cations of an acid are bound by an electrostatic attraction, is dissolved in water. In the present invention, It is used to increase peptide or protein ionic strength.
In the case where the aqueous salt solution is used in step (a) of the present invention, the aqueous salt solution used in the art can be used without limitation.
Preferably, the aqueous solution is at least one aqueous solution of an aqueous solution of sodium chloride, aqueous solution of calcium chloride, aqueous solution of magnesium chloride, aqueous solution of ammonium sulfate and aqueous solution of bicarbonate, more preferably aqueous solution of sodium chloride, aqueous solution of calcium chloride and aqueous solution of magnesium chloride Or more, and most preferably an aqueous solution of sodium chloride.
Further, the preferable concentration of the aqueous salt solution is 0.01-10 mole, more preferably 0.1-5 mole, and most preferably 0.25-1 mole.
Moringa It is preferable to add the oleic acid seed powder to the aqueous salt solution and stir at a stirring speed of about 100 rpm or less for about 20 to 30 minutes.
After stirring, the mixture was precipitated for about 2 hours, primary filtered using a broad -leaved bed, secondary filtered with a filter paper of 10 μm or less, An aqueous solution of the peptide and / or polypeptide protein extracted from olea berry seeds is prepared.
The step (b) of the present invention includes a step of preparing an aqueous mixture solution by adding an aqueous aluminum salt solution to the protein aqueous polymer solution in an amount of 10-80% by volume based on the volume of the protein aqueous polymer solution.
According to a preferred embodiment of the present invention, the concentration of the aluminum salt aqueous solution in step (b) of the present invention is 0.1-30%, more preferably 1-15, even more preferably 3-15, It is 5-7%.
In the step (b) of the present invention, when an aqueous solution of a mixture of a protein polymer and an aluminum salt is prepared by adding an aluminum salt aqueous solution to a protein aqueous polymer solution, it is preferable to add an aqueous 20-60% aluminum salt solution Do. More preferably, the volume ratio of the aluminum salt aqueous solution to the protein aqueous polymer solution is 25-50% by volume of the aqueous solution of the protein polymer.
The aqueous aluminum salt solution used in step (b) of the present invention is not limited as long as it is an aqueous aluminum salt solution known in the art.
According to a preferred embodiment of the present invention, in step (b) of the present invention, the aqueous aluminum salt solution is at least one aluminum salt selected from the group consisting of aqueous aluminum sulfate, aqueous aluminum polychloride solution, aqueous aluminum polyphosphate silicate solution, More preferably an aqueous solution of aluminum sulfate, an aqueous solution of polyaluminum chloride or all of them, most preferably an aqueous solution of aluminum sulfate.
Step (c) of the present invention comprises preparing an aqueous solution of a polyacrylamide polymer in an aqueous solution of a mixture of a protein aqueous solution and an aluminum salt aqueous solution, stirring the mixture, and then centrifuging.
In the case of the stirring step, if the stirring speed is too high, the peptide or polypeptide, which is a natural polymer present in water, and the complex with the ligand of aluminum ion and polyacrylamide are not formed properly. It is preferable to carry out the reaction at 30-40 rpm for 1 hour or more.
Meanwhile, the step (c) of the present invention is a method in which an aqueous solution of an aluminum salt is mixed with an aqueous solution of a protein polymer and an aqueous solution of a polyacrylamide polymer is injected into the aqueous solution of the protein, and salts and seeds of the salt and the carbohydrates, And precipitating dissolved aluminum that is not dissolved.
In the step (c) of the present invention, when a polyacrylamide polymer aqueous solution is added to an aqueous solution of a mixture of a protein aqueous solution and an aluminum salt aqueous solution, the concentration of the aqueous polyacrylamide polymer solution is preferably 0.01-10%. More preferably, the concentration of the polyacrylamide polymer aqueous solution is 0.05-0.1%.
In addition, in the step (c) of the present invention, when a polyacrylamide polymer aqueous solution is added to an aqueous solution of a mixture of a protein aqueous solution and an aluminum salt aqueous solution, the volume of the aqueous polyacrylamide polymer solution is 0.01-10% . More preferably, the volume of the polyacrylamide polymer aqueous solution is 0.05-2%, and most preferably 0.1-0.5%, by volume of the aqueous solution of the protein polymer.
In the step (c) of the present invention, an aqueous solution in which a polyacrylamide polymer containing ionic, nonionic, and both thereof are dissolved can be used.
The cationic polyacrylamide polymer is suitable for the production of coagulants used for the treatment of organic wastewater, and the anionic polyacrylamide polymers can be effectively used for the production of coagulants for wastewater treatment with a large amount of inorganic pollutants.
According to a preferred embodiment of the present invention, the polyacrylamide polymer used in step (c) of the present invention is at least one selected from the group consisting of an anionic polyacrylamide polymer, a cationic polyacrylamide polymer, and a nonionic polyacrylamide polymer A polyacrylamide polymer, more preferably an anionic polyacrylamide polymer, a cationic polyacrylamide polymer or all of them, and most preferably an anionic polyacrylamide polymer.
The features and advantages of the present invention are summarized as follows:
(I) The present invention provides a method for producing a flocculant for treating water or wastewater, and a flocculant for treating water or wastewater.
(Ⅱ) the inventors integer or flocculant and to the manufacturing method for waste water treatment is a natural polymer flocculant of Moringa And economically separating the protein polymer comprising the oligopeptide seed-derived peptides and / or polypeptides without a microfiltration process.
(Iii) Further, the flocculant for treating purified water or wastewater according to the present invention can effectively reduce the concentration of residual aluminum, compared to the flocculant containing aluminum, and can remove heavy metals, nitrogen and phosphorus from treated water or sludge Can be removed very effectively.
(Iv) In particular, the flocculant for the treatment of purified water or wastewater according to the present invention has an advantage that a coagulation effect can be exerted at a low temperature of 0-20 ° C.
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view of a method for producing a flocculant for the purification of the present invention or a wastewater treatment.
Hereinafter, the present invention will be described in more detail with reference to Examples. It is to be understood by those skilled in the art that these embodiments are only for describing the present invention in more detail and that the scope of the present invention is not limited by these embodiments in accordance with the gist of the present invention .
Example
Example 1: Alumina content analysis by flocculant
Two 2-liter beakers were prepared on a magnetic stirrer, and each 1 liter of dH 2 O was added, and the speed was fixed at 100 rpm. Then, 0.5 M NaCl (Duksan Chemical Co., Korea) was added to dissolve completely.
MORINGA, which extracted the oil imported from Chennai, India Blow amount Olay (Moringa oleifera) respectively by 10 g seed powder was placed in the two beakers. The beaker containing the mixture was stirred for 30 minutes at a speed of 80 rpm and precipitated for 2 hours.
After precipitation, the supernatant, which is an aqueous solution of the peptide, was carefully separated.
The separated peptide solution was weighed into two clean 1 L beakers in an amount of 300 mL and dispensed.
Then, the filtered aqueous solution of the peptide separated from the precipitate after filtration was set at 60 캜.
300 ml and 75 ml of a 7% aqueous solution of aluminum sulfate (Samwoo Chemical Co., Korea) were added to the above peptide aqueous solution, stirred at 60 rpm for 1 hour, precipitated for 2 hours and then centrifuged at 6000 rpm / And centrifuged to prepare a flocculant in which 300 ml of aluminum sulfate and 300 ml of peptide were mixed, 75 ml of aluminum sulfate and 300 ml of peptide were mixed.
After 300 ml and 75 ml of a 7% aqueous solution of aluminum sulfate (Samwoo Chemical Co., Korea) were precisely weighed into the above-prepared peptide aqueous solution, 2 ml of anionic polyacrylamide polymer (KOLON, Korea) at a concentration of 0.1% . Then, the mixture was stirred at a speed of 60 rpm for 1 hour and precipitated for 2 hours and centrifuged at 6000 rpm / min to obtain a sample mixed with 300 ml of aluminum sulfate, 300 ml of peptide and 2 ml of anionic polyacrylamide, , 300 ml of the peptide and 2 ml of the anionic polyacrylamide were mixed to prepare a coagulant.
The concentration of aluminum contained in each of the coagulants thus prepared was measured.
As a result, each of the coagulants contained aluminum at a concentration of 50% or less as compared with 7% of the aluminum sulfate aqueous solution. The results showed that each of the flocculants prepared through this study was environmentally friendly and safer (Table 1).
Example 2: Low temperature coagulation of flocculant and determination of precipitation reactivity
Anionic flocculant sample and Aluminum sulfate: Anionic polymer solution = 75 ml: 300 ml: Anionic polymer = 300 ml: 300 ml: 2 ml in the same manner as in Example 1, The coagulation and precipitation reactivity of the second coagulant sample prepared at a ratio of 2 ml was tested at a temperature below 5 ° C.
The sample was prepared by placing 250 ml of each pond water at Kyungpook National University into three 500 ml beakers.
PAC (poly aluminum chloride, Samwoo Chemical Co., Ltd.) and raw water were placed in a 2 L beaker filled with ice, and the temperature was maintained at 5 ° C.
1 ml of each of the PAC, No. 1 coagulant and 2 coagulant samples was poured into three beakers containing the raw water (pond water), put into a self-tester, rapidly stirred at 150 rpm for 2 minutes, and slowly stirred at 40 rpm for 20 minutes Lt; / RTI > After stirring, the mixture was allowed to settle for 30 minutes, and then the chromaticity and turbidity were observed.
As a result of the experiment, the aluminum sulfate in the PAC - injected sample was changed into a colloid state in the aqueous solution and the precipitation did not occur. The turbidity increased more than twice, though the chromaticity increased slightly compared to the raw water.
However, in the coagulant samples No. 1 and No. 2, the same linear flare was observed, and a rapid precipitation was observed. The chromaticity of the coagulant samples No. 1 and No. 2 decreased by about 4 times or more as compared with the raw water, and the turbidity was increased by 8 to 9 times Respectively. In addition, the chromaticity of the coagulant 1 and 2 coagulant was about 4 times lower than that of the PAC injected sample, and the turbidity was very low, about 18-19 times (Table 2: low temperature applicability test).
Example 3: Evaluation of Residual Toxicity of Coagulants
The residual toxicity of the coagulant prepared by the method of Example 1 to fish was evaluated.
The pond water at Kyungpook National University was filled with 1 L each of 3 2-L beakers, and then added to a self-test machine. To the 1-beaker, 2 mL of 7% aluminum sulfate was added and the aluminum sulfate was specified. Ml of the anionic polymer solution: 300 ml: 300 ml: 2 ml of the aqueous solution of the aluminum sulfate: anionic polymer prepared according to the method shown in Example 1 was added to the beaker of No. 3, Was injected and then designated as a hybrid.
The beaker with each coagulant was rapidly stirred at 150 rpm for 2 minutes and slowly stirred at 40 rpm for 20 minutes. Then, each beaker was allowed to stand for 30 minutes, and then the supernatant was separated. Each supernatant was dispensed into 3 beakers (1 liter), and then 2 healthy goldfish were added.
After the start of experiment 10
After 10 minutes from the start of the experiment, the water quality of the beaker injected with 2 ml of aluminum sulfate changed rapidly to opaque. These results are presumed to be due to chemical changes caused by the reaction of aluminum sulfate with strongly acidic organic matter and secreted organisms at the start of goldfish activity.
About 2 hours after the start of the experiment
At about 2 hours after the start of the experiment, the activity of gold sulfate in aluminum sulfate group was drastically weakened, and it began to breathe up to the surface of the water. However, PAC and hybrid test group goldfish showed no change.
Six hours after the start of the experiment
The turbidity of opaque goldfish began to improve to the pre-test level for 6 hours after the start of the experiment, and goldfish in the PAC test group showed an abnormal phenomenon in which the goldfish swim upside down due to a marked decrease in activity, In the test group, the same activity as in the initial period was observed.
7 hours after the start of the experiment
After 7 hours from the start of the experiment, both aluminum sulfate and PAC test group goldfish died, but goldfish in the hybrid test group still showed the same activity as the initial test.
48 hours after the start of the experiment
After 48 hours from the start of the experiment, the goldfish in the hybrid test group showed the same activity and the experiment was terminated.
Example 4: Heavy metals and pollutants Removability Experiment
The flocculant prepared in the above Example 1 as a hybrid flocculant in the ratio of aluminum sulfate: anionic polymer: anionic polymer = 75 ml: 300 ml: 2 ml was designated as a hybrid flocculant and 7% aluminum sulfate flocculant and PAC flocculant were injected The effects of heavy metal, total phosphorus and total nitrogen removal on the injection amount were measured.
The pond water in the Namdong Industrial Complex in Incheon, which is not contaminated by the inflow of water other than rainwater, is placed in three 500 ml beakers each containing 250 ml of the polluted water. Then, the samples are placed in a self-test machine and 7% aluminum sulfate 0.5 ml of PAC, and 0.5 ml of the hybrid were injected. Each beaker was rapidly stirred at 150 rpm for 2 minutes and slowly stirred at 40 rpm for 20 minutes. After standing for 30 minutes, the supernatant was separated to analyze the concentration of CODmn and various heavy metals.
Heavy metal removal effect
Hybrid coagulants showed significantly lower residual aluminum concentration in treated water when used in the same amount as other aluminum flocculants, and other heavy metal removal effects were similar or overall superior to PAC or aluminum sulfate coagulants 3, Experimental result of heavy metal removal (unit: ㎎ / ℓ)).
Gun person And total nitrogen removal effect
In order to confirm the total phosphorus and total nitrogen removal effect, 250 ml of each liquid was poured into two 500 ml beakers which had been fermented and smelled in a pig farm at Jeongeup, Jeonbuk Province. The beaker sample was first adjusted to pH 6.5, which is the optimum pH of the aluminum sulfate coagulant using a 1M aqueous hydrochloric acid solution. Then, 6 ml of 7% aluminum sulfate coagulant and 4 ml of 25% hybrid coagulant Respectively. Then, the beaker containing each sample was rapidly stirred at 150 rpm for 2 minutes and then slowly stirred at 40 rpm for 20 minutes. The stirred beaker was allowed to stand for 30 minutes, and the supernatant was separated and analyzed.
As a result, the hybrid flocculant showed much better water quality improvement than aluminum sulfate flocculant. First, the pH change rate of the hybrid coagulant was lower than that of the aluminum sulfate coagulant, and the total phosphorus (TP) and total nitrogen (TN) removal rates of the hybrid coagulant were about 6.4 times and 1.4 times higher than those of the aluminum sulfate coagulant , And especially the concentration of aluminum (residual amount) was about 107 times lower (Table 4).
(NTU)
(cu)
(Mg / l)
(Mg / l)
(Mg / l)
(Mg / l)
Impossible
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the present invention. Accordingly, the actual scope of the present invention will be defined by the appended claims and their equivalents.
Claims (8)
(b) adding an aqueous aluminum salt solution to the protein aqueous polymer solution prepared in (a) at a concentration of 10-80% based on the volume of the aqueous polymeric protein solution to prepare an aqueous mixture solution; And
(c) adding a polyacrylamide polymer aqueous solution to the aqueous solution of the mixture prepared in (b) at a concentration of 0.01-10% based on the volume of the aqueous solution of the protein polymer to prepare a flocculant for treating water or wastewater (EN) METHOD FOR MANUFACTURING COEFFICIENT FOR WATER PURIFICATION.
Peptide or polypeptide in step (a) is a parent Manly A method for producing a flocculant for treating water or lower wastewater characterized by being a peptide or a polypeptide extracted from an oleafella seed powder.
Wherein the aqueous aluminum salt solution in step (b) is an aqueous 0.1-30% aluminum salt solution.
Wherein the step (b) comprises adding an aluminum salt aqueous solution at 20-60 vol% to prepare a mixture.
Wherein the aluminum salt aqueous solution in the step (b) is an aqueous solution of at least one aluminum salt selected from the group consisting of an aqueous solution of aluminum sulfate, an aqueous solution of polyaluminum chloride, an aqueous solution of polyaluminum silicate alumina and a solution of aluminum polysulfate aluminum silicate. Method of manufacturing coagulant for wastewater treatment.
In the step (c), the polyacrylamide polymer is at least one polyacrylamide polymer selected from the group consisting of an anionic polyacrylamide polymer, a cationic polyacrylamide polymer, and a nonionic polyacrylamide polymer. Process for producing coagulant for wastewater treatment.
Wherein the step (c) comprises adding a polyacrylamide polymer aqueous solution in an amount of 0.01-10% by volume of the aqueous solution of the protein polymer.
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| KR20160124387A (en) | 2015-04-17 | 2016-10-27 | 주식회사 신라엔텍 | Process of preparation for recycling coagulant based on aluminium in waste purification sludge |
| CN110734148A (en) * | 2018-07-18 | 2020-01-31 | 广西大青山控股集团股份有限公司 | Plant enzyme sewage purifying agent and preparation method thereof |
| CN109133310A (en) * | 2018-07-26 | 2019-01-04 | 锐达工业科技（南京）有限公司 | A kind of novel solid dephosphorization agent and preparation method thereof |
| CN116622037A (en) * | 2023-07-25 | 2023-08-22 | 东明旭阳化工有限公司 | Method for removing total phosphorus from caprolactam oximation wastewater, calcium hydroxide precipitant used in method and preparation method of precipitant |
| CN116622037B (en) * | 2023-07-25 | 2023-10-13 | 东明旭阳化工有限公司 | Method for removing total phosphorus from caprolactam oximation wastewater, calcium hydroxide precipitant used in method and preparation method of precipitant |
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