KR100247126B1 - Solid flocculant and high speed flocculation separator - Google Patents

Abstract

The present invention is a floc produced by using the solid phase flocculant and the solid phase flocculant and the solid phase flocculant which coagulate and react the suspended pollutant present in the water into a floc with a large particle size in a short time by only adding or stirring or dispersing it as a single product in sewage or wastewater. The present invention relates to a wastewater filtration method and a wastewater filtration system for easily separating lumps and treated water.

The composition of the solid phase coagulant of the present invention is a single treatment agent that uniformly mixes a soluble aluminum-based or iron salt-based inorganic coagulant with a pH self-adjusting agent, a polymer coagulant, and other essential ingredients in a powder form, and efficiently coagulates by synergistic action of each component. By causing a reaction, it has a very new flocculation effect which cannot be easily realized with a flocculant known to date.

In addition, the present invention is a solid-phase coagulant, which is a powder treatment agent is introduced into the wastewater introduced from a single reaction tank, the flocculation and the treated water generated after the flocculation reaction is composed of a double-coated audio with a gradient screen and a gradient filter, A high-speed separation using a wastewater filtration treatment device is simple, and the particle size of the solid phase coagulant of the present invention is added to the wastewater collected in the reaction tank 3 through the screen tank 1 and the sump tank 2, and then stirred. A magnetic floccule having good dewaterability of 1 mm or more is formed. The flocculation and the treated water thus formed are separated at high speed by the filtration device 100 and the treated water separated into solid-liquid at high speed is discharged through the discharge tank 5. The sludge separated from the water to be treated is a solid coagulant which is directly sent to the dehydrator for treatment, a wastewater filtration method and a wastewater filtration system using the same.

Description

Solid phase coagulant, wastewater filtration method and wastewater filtration system

The present invention relates to a solid-phase coagulant, a wastewater filtration treatment method and a wastewater filtration treatment device using the same, by adding only one single product as compared to the conventional wastewater treatment in the sewage and wastewater treatment. The solid phase flocculant which aggregates and reacts the suspended pollutants in the water to flocs with a large particle size in a short time by stirring or dispersing, and separates the flocks and the treated water generated by the same at high speed by a filtration device of a simple facility. By providing the wastewater filtration treatment device, efficient flocculation reaction is caused by synergistic action of each component of the solid coagulant, and the produced floc is filtered by the high-speed solid-liquid separation device. Degradable solid coagulant and wastewater filtration treatment room using the same The purpose is to provide a legal and wastewater filtration system.

Conventionally, there is a pH adjustment when used with inorganic coagulants represented by aluminum sulfate, polyaluminum chloride (PAC), and the like, which are generally used for wastewater and waste water treatment. There was a method of separating suspended suspended solids in treated water by flocs.

Although all of these flocculants can be injected relatively lightly in small amounts as aqueous solutions, the storage and transportation cost of the flocculant is high, and the polymer flocculant must be completely dissolved in the field, which makes the preparation difficult and takes a long time. Had a problem. Therefore, it takes not only a considerable amount of time to coagulate, but also a large amount of coagulation reaction tank is required to ensure a satisfactory reaction time. In addition, the maximum strength of the flocculation device after the flocculation reaction varies depending on the quality of the raw water even at high speed, but it is usually designed in the range of 2-3m / hr and residence time 2-4 hours. Etc. There were disadvantages.

That is, in the conventional method, there is a problem in that the reaction floc is long and the strength of the generated floc is low by adding an inorganic coagulant and a pH adjusting agent to generate a hydroxide floc and stirring the floc generated by adding the polymer thereto so as not to break. The reason for this is that when the polymer is added, the floc mainly composed of the hydroxide of the inorganic coagulant has a lot of moisture in the inside, so that the floc structure is loose and the coupling point between the hydroxide floc and the polymer bonder is small. The strength of the resulting polymer floss was low.

Meanwhile, in the conventional wastewater and wastewater treatment process, as shown in FIG. 2, the introduced wastewater and wastewater are first screened with suspended solids through the screen in the screen tank 1, and the first treated wastewater and wastewater are collected in a collection tank ( 2) Adjust the flow rate and flow rate, and adjust the pH in the pH adjustment tank (3 ') by injecting and stirring sodium hydroxide, and then inject and stir the chemicals such as aluminum sulfate and polymer in the reaction tank (3) and the flocculation tank (3 "). After the three-stage treatment procedure, the separated solid material is settled in the settling tank 10, the treated water is discharged through the discharge tank (5), the wastewater treatment process is completed in this case. Treatment procedures such as injection and stirring are complicated and costly, especially polymer coagulants must be completely dissolved and used for a long time. In addition, the complexity of operation, the increase of the installation area, the excessive operation cost, etc. Construction site It was impossible to deal with the wastes directly, such as wastewater treatment or the on-site treatment such as removal of green algae from ponds or lakes, etc. In addition, to treat the wastewater, it is necessary to select a treatment device and treatment method and a suitable flocculant. There are many improved methods such as adding diatomaceous earth, clay, gypsum, calcium carbonate, etc. to improve the flocculation rate of flocculant or to improve the dehydration of the floc. Therefore, since a standard process cannot be adopted, an efficient method that can be simplified in practical terms is required.

In order to solve the problems of the prior art, the present invention is easy to handle, has a low initial investment, and adds suspended pollutants in water in a short time by only adding and stirring the wastewater to be treated. The solid flocculant that produces this good floc, the wastewater filtration method and the wastewater filtration system have been developed.

In general, the key elements for the high performance of the flocculation sedimentation solid-liquid separator are firstly to be able to achieve a flocculation reaction to form a pellet with a dense and large particle size, and secondly to raise the sedimentation separator without stable and uniform drifting. In the conventional solid-liquid separation device, all have been focused on improving the above-mentioned core elements. However, since there is an inherent limitation in increasing the sedimentation separation rate by increasing the particle size of the floc, it was never thought that it was possible to improve the flocculation function of the flocculant itself and form a floc with a large particle size. Intensive research and development has been carried out.

Unlike the conventional case, the solid coagulant of the present invention improves the coagulation function itself, and is formed by uniformly mixing inorganic and coagulant aids having a self-regulating function of pH, and other possible essential additives in organic polymer coagulants. As a composite composition, the solid coagulant of the present invention is added to the water to be treated in a reaction tank as a single product and stirred to form a magnetic floss directly as a nucleus itself, and then to agglomerate into a floc with a large particle diameter of 1 mm or more in a short time. The water is agglomerated and separated at a high speed of 60-120m / hr by a simple filtration device consisting of a gradient screen and a gradient filter instead of a conventional large settling tank. In addition, by using the wastewater filtration system of the present invention, the movement and installation to a narrow place is also simplified, and the separated sludge can be directly sent to the dehydrator for treatment without going through a separate concentration tank.

In other words, in the present invention, the inorganic hydroxide floc is very fine and the structure of the floc causes the action of the polymer to increase the crosslinking and adsorption point of the polymer bond group (-CONH _{2 in} the case of polyacrylamide) and the microflux of the hydroxide. As a result, a floc with a high strength and a large particle size is formed in a fast time, which effectively causes pellet agglomeration.

That is, in the conventional method, the polymer is added at the time when the inorganic flop becomes large enough. However, in the present invention, a method of causing the action of the polymer added at the same time in the step of the fine inorganic floc is indistinguishable to the naked eye. will be.

1 is a wastewater treatment process diagram of the present invention

2 is a conventional wastewater treatment process diagram

3 is a main configuration diagram of a conventional wastewater treatment apparatus

4 is a main configuration diagram of the wastewater treatment apparatus of the present invention

5 is a perspective view showing the structure of the wastewater treatment filtration apparatus of the present invention

6 is a cross-sectional view of the state of use of the filtering device of the present invention

7 is a front view showing the configuration of the filtration device of the present invention

* Explanation of symbols for main parts of the drawings

1: Screen tank 2: Collection tank

3: reactor 3 ': pH adjustment

3 ": flocculation tank 4: stirrer

5: discharge tank 6: weighing tank

7: Powder chemical feeder 7 ': Sodium hydroxide feeder

7 ": Aluminum Sulfate Feeder 7 : Polymer Feeder

8: rotary blower 9: sludge concentration tank

10: sedimentation tank 12: upper water tank

13: lower tank 14: filter rod

15: Screen 16: filter

17: wastewater inlet 18: outlet

19: information board 20: drive motor

21,22: Bracket 30: Operation Bar

31 screw 34 cleaning device

40: injection pipe 50: guide rail

100: filtration device

The solid coagulant of the present invention comprises a soluble aluminum compound or a soluble iron salt compound, a natural or synthetic polymer coagulant, and the like, and an alkali metal carbonate or cement to such an extent that the pH of the aqueous solution of the coagulant is near neutral. A group composed of powdered granules and an inert substance such as calcium compounds, titanium dioxide and diatomaceous earth, carbonates of alkaline earth metals, bentonite-based soil mineral powders, zeolite-based powders and powdered activated carbon In the solid phase coagulant, a wastewater filtration method and a wastewater filtration system using the same, comprising at least two mixtures as essential additives.

The chemicals constituting the solid coagulant of the present invention include those known in the art in the field of water treatment, which are already used as components of some coagulants, but synthesizing the components of the solid coagulant requires formation of a specific composition. Since it exhibits a coagulation action based on, it has a very new action that could not be easily realized with a known coagulant.

The first feature of the solid-phase coagulant of the present invention is that the inorganic coagulant and the polymer coagulant, which are conventionally used as the subject of coagulation, are simultaneously added to the wastewater and wastewater. In other words, each aggregation effect is expressed without impairing the characteristics of both sides. The magnetic floc immediately melts itself as a nucleus, dissolving at the point of time when the components are added to the waste water without segregation of each component due to the almost identical working time with the inorganic coagulant mixed with the fine particles of the polymer coagulant and the third component. As a result, the aggregation reaction is completed in a short time.

A second feature of the high coagulant of the present invention is that the pH of the aqueous solution of the coagulant is maintained near neutral by compounding carbonates or cement granules of alkali metals, so that no additional pH adjustment is necessary. Therefore, the pH adjustment equipment by the injection of acid, alkali, etc. is not required, thereby reducing installation and operating costs.

A third characteristic of the solid coagulant of the present invention is at least 2 in the group consisting of inert materials such as calcium compounds, titanium dioxide, diatomaceous earth, alkaline earth metal carbonates, bentonite-based soil mineral granules, zeolite-based granules and powdered activated carbon. By mixing the mixture of species as essential additives, the compounding ingredients become nuclei of the generated flocs, and as a synergistic effect of each ingredient, adsorption and coagulation can be expected, which also serves as COD removal of dissolved components in the treated water. The floc is also stable and strong, which improves dehydration.

As a fourth feature of the solid coagulant of the present invention, as described above, since the wastewater treatment is simple and reliable, wastewater generated in civil engineering and construction sites, which is almost impossible to directly process on a conventional site, is also used. By using the wastewater filtration treatment device, not only can it be easily processed and recycled, but it is also a simpler facility in the field where conventional direct treatment is performed, and the sludge generated can be dehydrated immediately without going through the thickening tank. The amount is also very small compared with the conventional one.

The solid-phase coagulant of the present invention is obtained by blending the specific compounds constituting the present invention in powder form at the same time and mixing them uniformly. The blending ratio of the composition is somewhat variable, but the basic composition is determined by the blending amount of the soluble aluminum or iron salt compound as a coagulant component with the natural or synthetic polymer coagulant. Here, as pH adjusting agent, alkali metal carbonate or cement powder, inert materials such as calcium compounds, titanium dioxide, diatomaceous earth, carbonates of alkaline earth metals, bentonite-based soil mineral powder, zeolite-based powder and powder activated carbon specified in the present invention At least two mixtures in the group consisting of are formulated as essential additives.

The composition of the present invention is 100% by weight of the total constituent weight ratio, 15 to 50% by weight of soluble aluminum or iron salt compound, 0.5 to 15% by weight of natural or synthetic polymer coagulant, carbonate or cement of alkali metal The powder is composed of 10 to 40% by weight, and as an admixture, it is composed of inert materials such as calcium compounds, titanium dioxide and diatomaceous earth, carbonates of alkaline earth metals, bentonite-based soil mineral granules, zeolite-based granules and powdered activated carbon. At least two mixtures in the group constitute from 10 to 40% by weight.

In addition, the soluble aluminum compound which is one of the main components of the present invention is aluminum sulfate, aluminum chloride, polyaluminum chloride.

As the iron salt compound which is one of the main components of the present invention, ferrous chloride, ferrous sulfate, ferric sulfate, ferric polysulfate, and the like are suitable.

The polymer coagulant used in the present invention may be either natural or synthetic, and commercially available cationic, anionic or nonionic polymer coagulants may be used. Various polysaccharides can be used as a natural system, and fine powders obtained by freeze-drying or spray-drying an aqueous polysaccharide polymer solution mainly containing sodium alginate and chitosan-based polymer coagulants and β-1,3 glucan cultured in microorganisms are suitable.

As the carbonates or cement powders of alkali metals in the present invention, sodium carbonate, sodium bicarbonate, carry carbonate and portland cement are suitable.

In addition, the group essential additives specified in the composition of the solid coagulant of the present invention are inert materials such as gypsum, calcium compounds of lime, titanium dioxide and diatomaceous earth, alkaline earth metals of calcium carbonate and magnesium carbonate and bentonite soil mineral powder. , A zeolite-based powder and powdered activated carbon.

The wastewater filtration system of the present invention is configured as follows.

In the apparatus for high-speed solid-liquid treatment of the floc and the treated water generated by adding, stirring and dispersing powdery solid product coagulant into the introduced wastewater and wastewater, one reactor (3), powdered medicine feeder (7), and filtration The filtration device 100 of the wastewater treatment device composed of the device 100 is composed of an upper water tank 12 and a lower water tank 13, and a cross section is crushed between the upper water tank 12 and the lower water tank 13. The screen 15 in which the malformed filter rod 14 is provided in the horizontal direction is provided, and the screen 16 has the structure in which the filter 16 was provided. In addition, the drive motor 20 and the timer provided with upper and lower brackets 21 and 22 on the front of the filtration apparatus 100 to clean the foreign matter adhering to the filter 16 and the screen 15. It is provided by the screw and driven across the front of the filtration device 100 in the transverse direction and the other end of the injection pipe 30 and the washing water to spray the filter 16 and the screen 15 to the spray pipe ( 40).

On the other hand, using the solid coagulant of the present invention, a method of filtering wastewater and wastewater at high speed and an embodiment of wastewater filtration are as follows.

That is, the treated water, such as wastewater and wastewater, is collected in the sump tank 2 through the screen tank 1, and the solid-state coagulant is introduced by the powder chemical feeder 7 from the reaction tank 3, By adding, stirring and flocculating, a magnetic floc is formed on the suspended pollutant present in the water to be treated to form a large floc with a dehydration property in a short time and a particle diameter of 1 mm or more. The flocculation and the treated water formed in this way are subjected to high speed aggregation by a filtration device 100 at a high speed of separation rate 60-120 m / hr. At this time, when the contaminated sewage and waste water flows into the filtration device 100 of the present invention through the waste water inlet 17, the introduced waste water passes through the inclined filter 16 and the small particles are first filtered while the small particles are filtered. The wastewater is left over the inclined filter 16 and the wastewater is discharged through the net of the inclined filter 16, and the first treated wastewater that has exited the net is again passed through the inclined screen 15. Out of the discharge port 18 is discharged to the discharged waste is pushed out of the filtration device 100 by its own weight or esoteric debris. The wastewater guided to the upper water tank 12 and the inclined guide plate 19 is first treated with the mesh gradient filter 16 and secondly treated with the inclined screen 15 to further increase the separation and filtration effects of the solids. . In addition, if the above operation continues, a large amount of foreign matter is caught on the surface of the filter 16, and various foreign matters are caught between the filter 16 and the screen 15. Washing water is strongly sprayed to the surface of the screen 15 to settle, lower, and clean the solid material (SS) or sludge. The solid state coagulant of the present invention and the application field of the wastewater filtration treatment method and the wastewater filtration treatment device using the same are not specific, but the direct treatment of wastewater and wastewater in civil engineering and construction sites, and circulation and reuse of treated water as well as fouling On-site treatment of river water, direct removal of green algae from ponds, reservoirs, lakes, floating suspended solids in fish farms, tertiary treatment for SS and phosphorus removal in sewage and wastewater treatment plants, expansion of existing sewage and wastewater treatment plants using flocculants, It can be very useful in a wide range of applications such as alternative facilities, wastewater treatment such as water soluble cuttings, grinding wastewater treatment in stone factories, pottery plants, and flocculation of other industrial wastewater.

The following is a comparative example of the results obtained by the method using the solid coagulant and the wastewater collection and treatment apparatus of the present invention and the results using the conventional treatment method and apparatus.

* As shown in the comparative example, the apparatus of the wastewater treatment method using the solid coagulant of the present invention, as compared with the conventional wastewater treatment method, does not require a pH adjustment facility, is a simple device, and can be separated at a high speed solid solution. It also has excellent installation cost and low cost.

The solid coagulant of the present invention is a composite composition composed of a homogeneous mixture of inorganic coagulants and preparations, organic polymer coagulants and other functional essential additives. The coagulant reactivity in the water to be treated has uniformity, compared with the conventional coagulant method. Therefore, it exhibits a very good industrial effect in terms of reaction time and simplicity in operation. In particular, the present invention forms a magnetic floc directly in water by mixing a highly reactive organic polymer agglomerate with powder in the structure together with the inorganic component synergistically in the structure, and the floc is a very fine and dense step of the polymer flocculant. Increasing the linker, microflux and crosslinking adsorption point results in the formation of a floc with high strength and effectively agglomeration of pellets.

The solid coagulant of the present invention is directly injected into sewage and wastewater to be treated at the treatment site as a single product, and the suspended contaminants in the sewage and wastewater are mixed with flocculants having a particle diameter of 1 mm or more and treated water only by stirring and mixing the two. Separation is achieved simply by filtration rather than conventional sedimentation tanks, which not only occupy a large installation area but also make it very easy to move to a narrow place or to install and dismantle. In addition, the sludge generated can be dehydrated immediately without going through the concentration tank, and the amount is very small. Therefore, the solid coagulant of the present invention, the wastewater filtration method and the wastewater filtration method using the same have been developed based on a completely different concept from the conventional flocculation sedimentation theory. It is very useful.

Claims (3)

The composition of the composition is 100% by weight, 15 to 50% by weight of soluble aluminum or iron salt compound, 0.5 to 15% by weight of natural or synthetic polymer coagulant, and 10 to 40% by weight of carbonate or cement powder of alkaline earth metal. 10 to 40 wt% of a mixture selected from the group consisting of inerts, carbonates of alkaline earth metals, bentonite-based soil mineral powders, zeolite-based powders, and powdered activated carbon. Solid-state coagulant characterized by uniformly mixing Inflow of sewage and wastewater is collected through the screen tank (1) to the sump tank (2), and the composition ratio of the total composition is 100% by weight in one reactor (3) by a powder chmical feeder. 15 to 50% by weight of soluble aluminum or iron salt compounds, 0.5 to 15% by weight of natural or synthetic polymer coagulants, and 10 to 40% by weight of alkaline earth metal carbonates or cement powders. At least two mixtures selected from the group consisting of carbonates of alkaline earth metals, bentonite-based soil mineral powders, zeolite-based powders, and powdered activated carbons. The mixture is added, stirred, and agglomerated to form a magnetic floss directly as a nucleus, which aggregates into a large floc with a particle diameter of 1 mm or more in a short time, and is produced therefrom. The lump and the treated water are firstly treated with the inclined filter 16 by the filtration device 100 composed of the inclined screen 15 and the inclined filter 16 and the secondly treated with the inclined screen 15 to solids and sludge. Wastewater filtration treatment method characterized in that the filtration treatment at high speed. Reactor (3), powder chemical feeder (7), filter self-propelled self-filter (100) for solid-liquid treatment of the floc and the treated water generated by adding, stirring and dispersing solid coagulant to the introduced wastewater and wastewater. The wastewater treatment device is composed of a wastewater treatment device, and the filtration device 100 is divided into an upper water tank 12 and a lower water tank 13, and a cross-section is formed between the upper water tank 12 and the lower water tank 13 in the shape of a crusher. The screen 15 is provided with the filter rod 14 in the transverse direction, the filter 15 is provided on the surface of the screen 15, the brackets 21, 22 on the front of the filtration device 100 The drive motor 20 and the screw 31 driven by the timer is provided, and the wastewater filtration apparatus, characterized in that consisting of the operation bar 30 and the injection pipe 40 at the side end.