KR101143231B1 - Treatment agents for food waste water and treatment process of food waste water thereby - Google Patents

Abstract

PURPOSE: An agent for treating wastewater from food waste and a method for treating the wastewater from the food waste using the same are provided to enhance the pin floc of solid materials from food waste formed in a coagulating bath by supplying floc enhancer. CONSTITUTION: An agent for treating wastewater from food waste is an agent for enhancing pin floc. The agent is composed of 40-60 weight% of sodium silicate represented by chemical formula 1, 20-40 weight% of poly(diallyl dimethyl ammonium chloride) represented by chemical formula 2, 0.5-2 weight% of polyamine represented by chemical formula 3, and 10-20 weight% of water. In chemical formula 1, n is between 2 and 4; and X is between 1 and 5. In chemical formula 2, n is between 100 and 10,000. In chemical formula 3, n is between 100 and 10, 000.

Description

Food wastewater treatment agent and food wastewater treatment method using same {TREATMENT AGENTS FOR FOOD WASTE WATER AND TREATMENT PROCESS OF FOOD WASTE WATER THEREBY}

The present invention relates to a food wastewater treatment agent and a food wastewater treatment method using the same, and more particularly, wastewater obtained by separating and dehydrating food waste into a reaction tank is treated with a coagulant aid and a polymer flocculant to form a fine floc. Then, the polymer flocculant and the food wastewater treatment agent are added to the flocculation tank again to reinforce the flocculation of the flocculated food solids and dehydrate to form a cake, and there is almost no odor, and the treated water is treated in connection with a public treatment facility. The present invention relates to a food wastewater treatment agent and a food wastewater treatment method using the same, which can be made into an unrestricted water quality even when discharged to a river, and particularly suitable for recycling solids generated from food wastewater into resources such as organic fertilizer and fuel.

As is well known, wastewater generated from food waste is an extremely high concentration of malignant wastewater, and a method for purifying the wastewater has not been properly developed, and if discharged without permission, it causes severe environmental pollution problems.

Food wastewater requires a huge amount of funds, such as the need to install an advanced treatment facility that removes nitrogen and phosphorus, which cause river eutrophication and red tides of seawater, and even if such facilities are not completely purified, the final discharged water is not available. In most cases, the dumping process is linked to sewage treatment facilities or most of the ocean dumping, but even from 2012, the London Treaty has banned all dumping of food waste and livestock wastewater, which requires an innovative method for food purification. Currently, activated sludge method, oxidation tank method, long-term aeration method, membrane separation method, liquid phase separation method, etc. are applied as known food purification treatment methods, but among these, there are many problems in the actual introduction and use, and there are few practical applications.

For these reasons, there is a high cost of treating or composting food waste, so it is rare for small individuals or livestock farmers to clean up directly, and it is usually done in a facility operated by a state or local government. In addition, animal wastewater contains high concentrations of nutrients such as nitrogen and phosphorus, so it is emerging as a second environmental pollution source by using harmful chemicals such as a large amount of moisture control agent and flocculant to purify livestock manure. In addition, there is a decomposition method (for example, TNT, NBR, PLASMA) for the treatment of food waste or livestock manure waste water, and there are also virtual negative pressure method, anaerobic aerobic treatment method, but the actual application by introducing such a method There are many difficulties in terms of cost and efficiency, and most of them fail.

In order to overcome the above problems, Korean Patent Publication No. 2003-0001698 (published on Jan. 08, 2003) discloses a dehydration means (4) in a cohesive tank (1) to which positive and negative ion tanks (2) and (3) are connected. Pressurized and dewatered waste from the dewatering means (4) to desorb the wastewater to be sent to the first treatment tank (5), and the wastewater transferred to the first treatment tank (5) is a pipe flocculator. (6) is transferred to the flotation separator (7), and the flotation separator (7) separates the sludge and the wastewater separated from the sludge and the wastewater while separating the sludge contained in the wastewater by floating the wastewater by floating action. It is sent to the secondary storage tank (9), and the pipe flocculator (6) is connected to the flocculant dissolving means (10), water admixture tank (11), neutralizer tank (12) supplied with water in sequence to the first treatment tank (5). Wastewater, which is treated from the wastewater and is transferred to the flotation separator 7, is agglomerated in the pipe flocculator 6, and The secondary storage tank 9 is connected with wastewater purification treatment means 13, which is a biological treatment means, to purify the desorption liquid desorbed from the food waste, purify the desorption liquid desorbed from the food waste, and return the excess sludge conveying treatment means 14. Desorption and high concentration wastewater treatment systems for food waste are known, which are configured to facilitate efficient purification and to discharge them to the discharge unit 15.

In addition, Korean Patent Publication No. 10-2011-0058929 (published 2011. 06. 02) discloses a method for removing nitrogen and phosphorus contained in a large amount of wastewater, livestock wastewater, and manure from food waste, which is settled. Food effluent, livestock wastewater and manure, which comprises the steps of diluting, adding diluted supernatant and purifying accelerator, first treatment tank stage, septic tank stage, reaction and recovery tank stage, and cycle recovery cycle cycling. It is characterized by an integrated purification method.

However, the prior art is a method for large-scale wastewater treatment, it is expensive due to the complexity of each step equipment, and in order to improve the purification efficiency of the discharged treated water, flocculation, pressurization, flotation, biological treatment, etc. There is a problem such as to be carried out by the method.

In addition to the above prior art, using microorganisms in the aeration tank. Microorganisms for wastewater treatment, wastewater treatment with shells, flocculants using cation exchange capacity of bentonite, inorganic flocculants including polyaluminum chloride, and wastewater treatment devices using the same are known, but there are problems in their practicality There are many difficulties in the field application.

On the other hand, the flocculant refers to a drug used for the purpose of facilitating the separation of solid-liquid, such as precipitation, filtration, flotation separation by combining the fine particles and colloidal particles suspended and dispersed in the liquid to a large (floc). The flocculant is flocculated to shorten the settling time in water treatment to increase the settling efficiency, or to precipitate, separate and remove fine particles or soluble materials.

Generally, flocculants include aluminum sulfate (As), polyaluminum chloride (PAC), polyaluminum silicate silicate (PASS), polyaluminum hydroxide hydrochloride (PAHCS), ferric sulfate (Fe ₂ (SO ₄ ) ₃ xH ₂ O) , Ferric chloride (liquid, FeCl ₃ ), polyamine, and the like, among which agglomeration of aluminum by aluminum sulfate reacts with alkali in water to produce aluminum hydroxide (Al (OH) ₃ ), which is suspended in liquid. It combines with the material and gradually grows into a large floc and settles. However, the formation process of aluminum hydroxide and the coagulation mechanism are complicated, and the coagulation process produces Al polymerized ions (Al ₈ (OH) ₄ +, Al ₈ (OH) ₂ +, etc.), which forms pH and coexistence. Depends on ions, flocculants, etc., and greatly influences the floc forming ability. In addition, since the solubility of aluminum hydroxide is 0 at pH 5.5 to 8.5, aggregation by aluminum sulfate occurs within this range.

Polyaluminum chloride is a basic polymeric aluminum with a composition of [Al ₂ (OH) nCl ₆ -n] n. It is a colorless to light yellowish brown liquid. It is characterized by the electrical neutralization of suspended solids in water and in comparison with aluminum sulfate in OH crosslinking. It is excellent and there is no alkalinity and pH lowering phenomenon when injecting aluminum sulfate, so the optimum coagulation pH range and low water temperature can be used, so it is easy to maintain water treatment facilities. In Korea, this product is widely used in water purification plants nationwide.

Polyaluminum Sulfate (PASS) is a basic polyaluminum hydroxy silicate sulfate compound with the composition of Ala (OH) b (SO ₄ ) c (SiO ₂ ) d (H ₂ O) x, which is a transparent liquid. Since it works at a wide pH like PAC, there is no need to adjust the pH of raw water, and the effect lasts even in winter due to less influence of temperature. It is known that floc is heavy due to the action of the contained silicon component, so that the settling speed is excellent and turbidity is further improved.

Polyaluminum Hydrochloride Silicate (PAHCS) is a basic compound having a composition of AlNaxSiy (OH) zClb. It is a colorless to light yellow viscous liquid. Its characteristics are good cohesiveness at low temperature, high turbidity, high temperature, The flocculation performance is not reduced even at high pH, and the floc is dense, heavy and homogeneous, so the sedimentation rate is high.

Ferric sulfate is an iron compound having the composition of Fe ₂ (SO ₄ ) ₃ ㆍ xH ₂ O. It is a gray or white powder or crystal, and its feature is effective for water treatment of groundwater and is often used in combination with other flocculants. . There is no problem with residual alumina, but the molten iron must be managed.

Ferric chloride (liquid) is a yellowish brown to orange liquid with a composition of FeCl ₃ , the characteristics of which are similar to those of ferric sulfate, and polyamine is epichlorohydrin-dimethylamine polyamine, a colorless to tan brown organic coagulant. . In general, organic coagulants are not significantly affected by water quality such as pH and have a similar function to polyacrylamide.

In addition, the organic polymer coagulant is effective for wastewater that is difficult to treat only with aluminum sulfate, and precipitation of the added coagulant does not occur and the pH does not change. In addition, the amount of sludge generated is less than that of aluminum, and the dehydration is improved, and there is no increase in ions, as well as being not affected by coexisting salts, pH, and temperature.

For reference, flocculent aids are generally used in small amounts to increase the flocculation efficiency of the flocculant. Examples of the flocculant aid include acid, alkali, activated silica, clay, and the like, and bentonite is suitable for water. Maintains turbidity, allowing coagulation to occur.

Other water treatment agents include zeolites, elites, activated carbon and sulfuric acid. Zeolite is mainly used as a cation exchange resin to remove ammonia nitrogen and heavy metals, and since illite has adsorptive performance as a silicon compound, it is effective for removing turbidity materials. Activated carbon is very effective for organic pollutants, but the remaining sludge treatment remains a problem. Sulfuric acid assists in the coagulation process during the purification process by adjusting the pH when the algae grows large and the pH of the water becomes alkaline. In addition, slaked lime, sodium hydroxide, sodium carbonate and the like are used as the alkali agent used to adjust the pH of the wastewater. Korea has mainly used hydrated lime, but since it is powder, it is difficult to automatically administer and sludge is produced a lot, and recently, the number of water purification plants using liquid sodium hydroxide is increasing.

However, in the present invention, by using a flocculent aid and a polymer flocculant, which is harmless to the environment, to treat the food wastewater through the reaction tank and the flocculation tank, and to reinforce the fine floc of the food solids aggregated in the flocculation tank. By using a food wastewater treatment agent (floc strengthening agent), the present invention has been completed by focusing on the fact that even in a low pH region, an alkali agent can be easily aggregated without the use of an alkaline agent or a separate treatment step.

An object of the present invention, when treating the food wastewater through the reaction tank and the flocculation tank using the flocculation aid and the polymer flocculant, food waste water treatment agent (floc strengthening agent) for strengthening the fine floc (flo floc) of the food solids formed in the flocculation tank ) In providing.

Another object of the present invention, when treating the food waste water by adding a coagulant aid and a polymer coagulant to the reaction tank or flocculation tank, to form a fine floc (flo floc) in the flocculation tank, and then the food waste water treatment agent (floc) to strengthen the floc By adding the reinforcing agent) to the coagulation tank, the food wastewater can efficiently form a large amount of food solid flocs at low cost without using alkaline agents or a separate treatment process to maintain the neutrality even in the low pH range of pH 3-4. To provide a treatment method.

Food wastewater treatment agent of the present invention for solving the above problems, as a treatment agent for strengthening the fine flo (pin floc) formed in the reaction tank and agglomeration tank during food wastewater treatment, sodium silicate represented by the formula (1) ) 40 to 60% by weight, 20 to 40% by weight of a polydead membrane (PolyDADMAC, Polydiallyl dimethyl ammonium chloride) represented by the formula (2), 0.5 to 2% by weight of polyamine represented by the formula (3), 10 to 20% by weight of water Characterized in that comprises a.

<Formula 1>

Na ₂ O-nSiO ₂ -XH ₂ O

(N = 2 ~ 4, X = 1 ~ 5)

<Formula 2>

(C ₈ H ₁₆ NCl) n

(N = 100 to 10,000)

<Formula 3>

(C ₅ H ₁₂ NCl) n

(N = 100 to 10,000)

In addition, the polydead membrane (PolyDADMAC, Polydiallyl dimethyl ammonium chloride) is characterized in that the homopolymer (Homopolymer) of diallyl dimethyl ammonium chloride (DADMAC, Diaminel dimethyl ammonium chloride), the polyamine (Polyamine) epichlorohydrin It is characterized in that dimethylamine polyamine (Epichlorohydrin dimethylamine polyamine).

And the food wastewater treatment method of the present invention, the first step of bringing food waste into the hopper, crushed and kneaded; A second step of transporting the food waste water dehydrated by solid-liquid separation of the crushed and kneaded food waste to a raw water tank; The dehydrated food wastewater was introduced into a reaction tank, and then 0.6 to 1.5 kg of a coagulant adjuvant made of aluminum chloride per 1 ton of food waste water and 0.3 to 0.8 kg of a polymer coagulant made of a cationic flocculant copolymer (CATIONIC FLOCCULANT COPOLYMER) were mixed. And reacting to form a fine floc; A fourth flocculant is added to the food wastewater in which the fine floc is formed, and 0.3 to 0.8 kg of a polymer flocculant consisting of a cationic flocculant copolymer and 1 to 3 kg of a food waste water treatment agent are added to reinforce the fine floc; step; And a fifth step of forming a cake by dehydrating the food solid formed by the floc with a dehydrator and discharging the leached treated water, wherein the cationic flocculation copolymer (CATIONIC FLOCCULANT CO-POLYMER) is made of poly It is characterized in that the acrylamide (Polyacrylamide).

When the food wastewater treatment agent of the present invention treats the food wastewater through the reaction tank and the flocculation tank by using the flocculating aid and the polymer flocculant, the purification of the food wastewater by strengthening the fine floc of the food solids formed in the flocculation tank. There is an effect of improving the efficiency.

In addition, in the food wastewater treatment method of the present invention, by adding a coagulant aid and a polymer coagulant in the reaction tank and the coagulation tank to aggregate the food solids to form a fine floc (pin floc), the food to reinforce the fine floc (pin floc) By injecting the wastewater treatment agent (floc enhancer) into the flocculation tank, it is possible to easily form flocs at low cost and to separate food solids with high efficiency even in the region where the food waste water is low at pH 3-4 without the use of alkali chemicals or a separate treatment process. Will be effective.

In addition, all the treatment process according to the present invention adopts an oxygen-free treatment method without oxygen supply or aeration, there is almost no odor, and even if discharged to the river after treating the treated water in connection with the public treatment facility, it is harmless to the environment In addition, since the cake formed from the wastewater is treated with an environmentally friendly process in the process of forming flocs, it is suitable for recycling it as organic fertilizer, fuel, and the like.

1 is a process flow chart showing a food wastewater treatment method according to the present invention.

Food wastewater treatment method of the present invention, the first step of bringing food waste into the hopper, crushed and kneaded; A second step of transporting the food waste water dehydrated by solid-liquid separation of the crushed and kneaded food waste to a raw water tank; The dehydrated food wastewater was introduced into a reaction tank, and then 0.6 to 1.5 kg of a coagulant adjuvant made of aluminum chloride per 1 ton of food waste water and 0.3 to 0.8 kg of a polymer coagulant made of a cationic flocculant copolymer (CATIONIC FLOCCULANT COPOLYMER) were mixed. And reacting to form a fine floc; The fine floc formed food wastewater was introduced into a flocculation tank, and the flocculant was prepared by adding 0.3 to 0.8 kg of a polymer flocculant composed of a cationic flocculant copolymer and 1 to 3 kg of a food wastewater treatment agent prepared according to the present invention. Step 4 to strengthen; The food solid formed by the floc is dehydrated with a dehydrator to form a cake, and the fifth step of discharging the leached treated water is sequentially performed.

Hereinafter will be described with respect to the food wastewater treatment method according to the present invention with reference to the drawings, which is intended to illustrate to the extent that it can be easily implemented by one of ordinary skill in the art to which the present invention belongs, This does not mean that the technical spirit and scope of the present invention is limited.

As shown in Figure 1, the food wastewater treatment method according to the present invention comprises a first step to a fifth step.

First, the first step process is to bring the food waste into the hopper, crush and knead it, which maintains the fluidity for solid-liquid separation, thereby making the reactivity and cohesion uniform and improving the settling speed of the food solids.

The second step process is to transfer the dehydrated food wastes to the raw water tank by solid-liquid separation of the crushed and kneaded food wastes to the raw water tank. Increases the efficiency of the plant and facilitates the formation of pin floc in the subsequent reaction and flocculation baths. At this time, the water content of food wastewater remaining after dehydration from food waste was about 70-75%.

In the third step, the dehydrated food wastewater is introduced into a reaction tank, and then a polymer coagulant comprising 0.6 to 1.5 kg of a coagulant adjuvant consisting of aluminum chloride per ton of food wastewater and a cationic flocculation copolymer (CATIONIC FLOCCULANT COPOLYMER). 0.3 ~ 0.8kg by mixing and reacting to form a fine floc, the flocculent aid is added to increase the effect of the flocculant in the wastewater treatment, the chloride dissociates into water to form an anionic electrolyte and polyacrylamide (Polyacrylamide) Cation coagulant copolymers such as c) cause crosslinking and adsorption flocculation and have a sedimentation promoting effect. In the present invention, as a result of numerous experiments, the coagulant aid and the polymer coagulant were mixed at a weight ratio of about 1: 0.5 to 2, and added to the reactor in an appropriate amount to study the most preferable to form a fine floc. It is preferable to use the polymer coagulant in a weight ratio of about 1: 1, but the coagulant aid is added in excess in advance to react with the polymer coagulant introduced in the fourth step.

In particular, the polyacrylamide-based polymer flocculant is known to be harmless to the environment with a molecular weight of more than 2 million to 40 million, as well as to increase the floc strength by coarse the floc size for dehydration compared to the general flocculant, primary In the reaction tank, it is introduced into the step of forming a fine floc, and it is studied that even if the dose is increased, flocs larger than the size necessary for dehydration cannot be formed.

In the fourth step, the food wastewater in which the fine floc is formed is introduced into a flocculation tank, and 0.3 to 0.8 kg of a polymer flocculant consisting of a cationic flocculant copolymer (CATIONIC FLOCCULANT CO-POLYMER) and 1 to 3 kg of food waste water treatment agent are added to the floc. The molecular coagulant is a food flocculant, as in the third step to form a fine floc (pin floc) as well as the food wastewater treatment agent prepared according to the present invention as a floc enhancer 1: 3 ~ 4 By including by weight ratio, the binding force of the fine floc is increased, the floc is coarsened to improve the settling speed of food solids to facilitate the solid-liquid separation of the waste water, thereby increasing the yield of solids.

The food waste water treatment agent is to strengthen the floc to coarse, 40 to 60% by weight sodium silicate represented by the following formula (1), 20 to 40% by weight of a polydead membrane (PolyDADMAC, Polydiallyl dimethyl ammonium chloride) represented by the following formula (2), It comprises 0.5 to 2% by weight of polyamine represented by the formula (3), 10 to 20% by weight of water.

<Formula 1>

Na ₂ O-nSiO ₂ -XH ₂ O

(N = 2 ~ 4, X = 1 ~ 5)

<Formula 2>

(C ₈ H ₁₆ NCl) n

(N = 100 to 10,000)

<Formula 3>

(C ₅ H ₁₂ NCl) n

(N = 100 to 10,000)

The sodium silicate has a cohesiveness as a floc forming aid, and when added to the granulation suspension, crosslinking and adsorption flocculation occurs, thereby promoting sedimentation promoting effect. That is, active silicon made from sodium silicate is an anionic polymer inorganic electrolyte. Colloidal fine particles of sodium silicate have a net negative charge because they have more nonmetal atoms than their metal atoms in the structure. Since most naturally occurring colloids are negatively charged and similar charges repel each other, colloids remain suspended by the action of repulsive force. The negatively charged colloidal particles attract the oppositely charged ions from the water.

The polydead membrane (PolyDADMAC, Polydiallyl dimethyl ammonium chloride) is a very strong cationic polymer flocculant, since the molecular weight is less than 1 million, it is difficult to form flocs of 1 mm or more, but exhibits an excellent effect as a flocculant for reinforcing fine flocs.

In addition, the polyamine is Epichlorohydrin dimethylamine polyamine, which is a colorless to yellowish brown organic polymer flocculant. In general, organic coagulants are not significantly affected by water quality such as pH and have a similar function to polyacrylamide. It is a liquid cationic polymer flocculant having various molecular sizes, and has an excellent flocculation effect on colloidal particles, which is effective for removing floating colloidal particles, removing natural coloring components, and removing algae.

In the present invention, when 1,6-hexanediamine having a reactive group of 4 is used in addition to epichlorohydrin and dimethylamine to increase the molecular weight of polyamine, the intrinsic viscosity increases to 5.5 mol% compared to dimethylamine, corresponding to {n} = 0.46. Branched polyamine materials can be obtained.

As above, the food wastewater treatment agent of the present invention comprises 40 to 60% by weight of sodium silicate, 20 to 40% by weight of polyDADMAC (PolyDADMAC, Polydiallyl dimethyl ammonium chloride), 0.5 to 2% by weight of polyamine (Polyamine) And mixed with 10 to 20% by weight of water to increase the negative charge of the food colloid by sodium silicate, so that the fine floc of food solids formed in the flocculation tank by the strong cationic complex action by the polydead membrane and polyamine It acts as a floc enhancer to strengthen).

In addition, the food wastewater is usually maintained between pH 3 ~ 4, when the flocculant (coagulant) is added in the reaction tank and the flocculation tank, in the conventional treatment method, the pH of the food wastewater should be raised to neutral by using an alkaline agent or the like. By using the treatment agent, due to the strong cationic flocculation, the agglomeration of the food wastewater sludge is made strong even in the low pH range, thereby increasing the binding force of the flocculant, thereby increasing the yield of the food solids. This is enough to reinforce the fine floc by adding 1 to 3 kg per 1 ton of the reaction tank and food solids, so that the amount of food solids in comparison with the conventional treatment method or the food wastewater treatment agent according to the present invention is not used. It was confirmed that the yield can be significantly improved to 40 to 50%.

The fifth step is to dehydrate the food solids formed by the floc with a dehydrator to form a cake and discharge the leached treated water. The treated water satisfies the environmental standards even when discharged into the river through a public treatment facility. The cake formed by the dehydrator is processed in a process that is harmless to the environment in the process of forming flocs, so it is suitable for resourceizing it as organic fertilizer, fuel, and the like. In addition, in all treatment processes according to the present invention, an oxygen-free treatment method without oxygen supply or aeration is adopted, and no odor is generated.

In order to verify the effect of the present invention, the following experiment was performed.

Experimental conditions for the food wastewater according to the present invention was measured 10 times for the waste water and the final treated water treated food waste according to the present invention and the average value is shown in Table 1 below.

division

SS
COD
BOD
TN
TP
enemy
(ppm)
1,053
39,120
68,200
3,205
536

Treated water
(ppm)
531.4
21,132
37,400
1,637
280

Processing efficiency
(%)
49.5
46.0
45.2
48.9
47.8

As shown in Table 1, as a result of treating the food wastewater source using the food wastewater treatment agent prepared according to the present invention, suspended solids (SS, Suspended Solids), chemical oxygen demand (COD), biological oxygen demand (BOD) ), Total nitrogen (TN) and total phosphorus (TP) were purified by about 50% of the treatment efficiency, and the treated water was treated to the public sewage treatment facility, so that the river could be discharged. Has been proven. In addition, according to the food wastewater treatment method of the present invention, in order to maintain neutrality even in a low pH range of pH 3 to 4, flocs of food solids can be easily and efficiently formed at low cost without using an alkaline agent or a separate treatment process. In addition, since the cake formed therefrom is processed in a process that is harmless to the environment in the process of forming flocs, it is possible to carry out this in a state suitable for recycling into organic fertilizer, fuel, and the like.

Therefore, the food wastewater treatment agent of the present invention can be substituted, modified and changed in various ways without departing from the technical spirit of the present invention, which is not only food wastewater but also agglomeration of wastewater sludge in ultra-high concentration malignant wastewater treatment such as livestock manure wastewater. It can be used for the purpose of strengthening.

Claims (5)

As a treatment agent for reinforcing the fine floc (pin floc) formed in the reaction tank and flocculation tank during food wastewater treatment, 40 to 60% by weight of sodium silicate represented by the following formula (1), polydead membrane represented by the following formula (2) PolyDADMAC, Polydiallyl dimethyl ammonium chloride) 20 to 40% by weight, food wastewater treatment agent comprising 0.5 to 2% by weight of polyamine represented by the following formula (3), 10 to 20% by weight of water.
<Formula 1>
Na ₂ O-nSiO ₂ -XH ₂ O
(N = 2 ~ 4, X = 1 ~ 5)
<Formula 2>
(C ₈ H ₁₆ NCl) n
(N = 100 to 10,000)
<Formula 3>
(C ₅ H ₁₂ NCl) n
(N = 100 to 10,000) The method of claim 1,
The polydead membrane (PolyDADMAC, Polydiallyl dimethyl ammonium chloride) is a food wastewater treatment agent characterized in that the homopolymer of diallyl dimethyl ammonium chloride (DADMAC). The method of claim 1,
The polyamine is a food wastewater treatment agent, characterized in that epichlorohydrin dimethylamine polyamine. First step of bringing food waste into a hopper, crushing and kneading;
A second step of transporting the food waste water dehydrated by solid-liquid separation of the crushed and kneaded food waste to a raw water tank;
The dehydrated food wastewater was introduced into a reaction tank, and then 0.6 to 1.5 kg of a coagulant adjuvant made of aluminum chloride per 1 ton of food waste water and 0.3 to 0.8 kg of a polymer coagulant made of a cationic flocculant copolymer (CATIONIC FLOCCULANT COPOLYMER) were mixed. And reacting to form a fine floc;
Food waste water treatment agent according to any one of claims 1 to 3 and the polymer flocculant 0.3 to 0.8 kg made of a cationic flocculation copolymer (CATIONIC FLOCCULANT CO-POLYMER) and the fine waste floc A fourth step of reinforcing the floc by adding 3 kg;
A fifth step of forming a cake by dehydrating the food solid formed by the floc with a dehydrator, and discharging the leached treated water;
Food wastewater treatment method comprising a. The method of claim 4, wherein
Cationic flocculation copolymer (CATIONIC FLOCCULANT CO-POLYMER) in the third and fourth step is a food waste water treatment method characterized in that the polyacrylamide (Polyacrylamide).

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