Wastewater and Foreign Substances Treatment Unit in Car Wash

Abstract

The present invention relates to a wastewater and foreign matter treatment device for a car wash, and more specifically, to a wastewater and foreign matter treatment device for a car wash that purifies wastewater discharged from a car wash to recycle the purified wastewater, and also facilitates the removal of odors from sediments settled in the wastewater so that the sediments can be disposed of, and helps to mix oil separated from the wastewater with sawdust to process it into pellets so that they can be used as heating energy in winter. The present invention comprises a car wash water pumping unit (29) installed at a certain distance from a chemical supply unit (15) and electrically connected to a control unit (9), which pumps the tertiarily purified water stored in a second water treatment tank (25) according to a control signal from the control unit (9) and sends it to a car wash water storage unit (27) connected to a car wash device; It includes a sediment treatment means (31) installed at one side of the lower part of the sedimentation tank (3) at a certain distance from the first discharge pipe (5) to suck up sediment settled inside the sedimentation tank (3) and dry the sucked-up sediment to easily remove odors from the sediment so that the sediment can be disposed of; and an oil treatment means (33) installed at one side of the upper part of the oil-water separation and collection tank (7) at a certain distance from the first discharge pipe (5) to suck up oil located inside the oil-water separation and collection tank (7), add sawdust to the sucked-up oil to mix it, dry the mixed mixture, and process the dried mixture into pellets so that it can be used as heating energy in winter.

Description

Technology Field

[0001] The present invention relates to a treatment device for wastewater and foreign substances (e.g., sediment, oil, etc.) discharged from a car wash, and more specifically, to a treatment device for wastewater and foreign substances in a car wash that purifies wastewater discharged from the car wash to recycle the purified wastewater, and also facilitates the removal of odors from sediments formed in the wastewater so that the sediments can be disposed of.

[0002] Furthermore, the present invention relates to a wastewater and foreign matter treatment device for a car wash that helps to use oil (or grease) separated from wastewater as heating energy in winter by mixing it with sawdust and processing it into pellets. Background Technology

[0004] With the recent development of industry leading to increased logistics and vehicle usage, air pollution during vehicle operation is becoming a problem; however, water pollution caused by the deterioration of water quality due to wastewater discharged into sewers during car washes is also gradually emerging as an environmental issue.

[0005] Although the wastewater generated during the washing of such vehicles contains fewer pollutants than industrial wastewater generated from various industrial facilities, the water quality is deteriorated by the various pollutants contained therein. The wax used during washing increases the Chemical Oxygen Demand (COD), and the soil or dirt generated during washing increases the Suspended Solids (SS). Furthermore, the chemicals used to treat this wastewater increase or decrease the pH, changing it to acidic or alkaline. Additionally, the oil or wax attached to the car during washing generates n-hexane extracts, and anionic surfactants are generated in the detergent used during washing.

[0007] To solve the aforementioned problem, an application was filed with the Korean Intellectual Property Office on September 12, 1997, under application number 20-1997-0025832 (Title of invention: Wastewater treatment device). Referring to FIG. 1, the claims are as follows: "a sedimentation and oil-water separation tank (100) configured to separate oil and fine particles in wastewater flowing in through a trench (50) by gravity; a collection tank (200) that temporarily stores wastewater flowing in from the sedimentation and oil-water separation tank (100) while maintaining it at a certain level; a pressurized tank (300) in which wastewater pumped from the collection tank (200) is mixed with air supplied from an ejector (310) and chemicals supplied from a chemical supply tank (320) and pressurized; and another A wastewater treatment device comprising: a line mixer (400) that receives chemicals from a chemical supply tank (330) and forms particles by chemical reaction; a flotation tank (500) equipped with an inclined plate (510) that receives wastewater containing these particles and separates the particles containing pollutants into treated water; a skimmer (520) located above the flotation tank (500) that collects scum containing pollutants; a dewatering device (600) that separates the scum collected by the skimmer (520) after dewatering it using a dewatering cloth and a net; a discharge tank (700) that receives the treated water separated from the flotation tank (500) and discharges it to the outside; and a reuse tank (800) that receives the treated water separated from the flotation tank (500) and uses it as reuse water for car washing, while the treated water separated from the flotation tank (500) is also supplied to the trench (50) for reprocessing. am.

[0009] As examined above, research and development regarding wastewater and foreign substance (sediment or oil, etc.) treatment devices for car washes are being steadily carried out.

[0011] The applicant intends to propose a wastewater and foreign matter treatment device for a car wash that purifies wastewater discharged from the car wash to recycle the purified wastewater, facilitates the easy removal of odors from sediments settling in the wastewater to enable disposal of the sediments, and helps to process oil separated from the wastewater into pellets by mixing them with sawdust so that they can be used as heating energy during the winter. The problem to be solved

[0013] Accordingly, the present invention is an improved invention designed to solve the various problems associated with the aforementioned prior art. The objective of the present invention is to provide a wastewater and foreign matter treatment device for a car wash that purifies wastewater discharged from the car wash to recycle the purified wastewater, facilitates the easy removal of odors from sediments settling in the wastewater to allow for the disposal of the sediments, and helps to mix the oil separated from the wastewater with sawdust to process it into pellets for use as heating energy during the winter.

[0015] However, the purpose of the present invention is not limited to the purposes mentioned above, and other unmentioned purposes will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0017] A wastewater and foreign substance treatment device for a car wash according to the present invention for achieving the above-mentioned purpose is,

[0018] A sedimentation tank (3) that collects wastewater discharged from a car wash and settles sediment from the collected wastewater;

[0019] A first discharge pipe (5) having one side installed inside the sedimentation tank (3) and the other side installed on the upper side inside the oil-water separation and collection tank to send wastewater stored in the sedimentation tank (3) to the oil-water separation and collection tank;

[0020] An oil-water separation and collection tank (7) installed at a certain distance from the above sedimentation tank (3) and collecting wastewater discharged from the first discharge pipe (5) and separating the collected wastewater into water and oil in the first step;

[0021] A control unit (9) installed at a certain distance from the above oil-water separation and collection tank (7);

[0022] A second discharge pipe (11) having one side installed inside the oil-water separation and collection tank (7) and the other side installed on the upper side inside the neutralization and coagulation tank to send the water primarily separated in the oil-water separation and collection tank (7) to the neutralization and coagulation tank;

[0023] An air supply unit (13) installed at a certain distance from the control unit (9) and electrically connected to the control unit (9) to send air to the neutralization and coagulation tank according to the control signal of the control unit (9);

[0024] A chemical supply unit (15) installed at a certain distance from the air supply unit (13) and electrically connected to a control unit (9) to supply chemicals to a neutralization and coagulation tank according to a control signal from the control unit (9);

[0025] A neutralization and coagulation tank (17) installed adjacent to the above-mentioned oil-water separation and collection tank (7), which collects the primarily separated water discharged from the second discharge pipe (5) and secondarily separates water and oil from the collected water, and also purifies the water primarily by neutralizing and coagulating the water with chemicals supplied by the supplied air;

[0026] A third discharge pipe (19) having one side installed inside the neutralization and coagulation tank (17) and the other side installed on the upper side inside the first treatment tank to send water that has been primarily purified in the neutralization and coagulation tank (17) to the first treatment tank;

[0027] A first water treatment tank (21) installed adjacent to the above neutralization and coagulation tank (17) and collecting primarily purified water discharged from the third discharge pipe (19) and secondarily purifying the collected water;

[0028] A fourth discharge pipe (23) having one side installed inside the first water treatment tank (21) and the other side installed on the upper side inside the second water treatment tank to send water that has been secondarily purified in the first water treatment tank (21) to the second water treatment tank;

[0029] A second water treatment tank (25) installed adjacent to the first water treatment tank (21) and collecting the secondarily purified water discharged from the fourth discharge pipe (23) and tertiarily purifying the collected water;

[0030] A car wash water pumping unit (29) installed at a certain distance from the above-mentioned chemical supply unit (15) and electrically connected to the control unit (9), pumping the tertiarily purified water stored in the second water treatment tank (25) according to the control signal of the control unit (9) and sending it to the car wash water storage unit (27) connected to the car wash device;

[0031] A sediment treatment means (31) installed at one side of the lower part of the sedimentation tank (3) at a certain distance from the first discharge pipe (5) above, which sucks in sediment settled inside the sedimentation tank (3) and dries the sucked-in sediment to easily remove odors from the sediment and allow the sediment to be disposed of;

[0032] It includes an oil treatment means (33) installed on one side of the upper part of the oil-water separation and collection tank (7) at a certain distance from the first discharge pipe (5), which sucks up oil located inside the oil-water separation and collection tank (7), mixes sawdust with the sucked-up oil, dries the mixed mixture, and processes the dried mixture into pellets so that it can be used as heating energy in winter. Effects of the invention

[0034] As described above, the wastewater and foreign matter treatment device for a car wash according to the present invention has the effect of saving resources by purifying wastewater discharged from a car wash and recycling the purified wastewater.

[0035] In addition, the present invention has the effect of easily disposing of sediment by easily removing odors from sediment settled in wastewater.

[0036] In particular, the present invention has the effect of saving resources by collecting the separated oil (or grease) when water and oil are separated from wastewater, mixing the collected oil with sawdust, and processing it into pellets so that it can be used as heating energy during the winter. Brief explanation of the drawing

[0038] FIG. 1 is a schematic diagram illustrating a wastewater treatment device according to the prior art. FIG. 2 is a schematic diagram illustrating a wastewater and foreign matter treatment device for a car wash according to the present invention. FIG. 3 is a schematic diagram illustrating the sediment treatment means of FIG. 2. Figure 4 is a schematic diagram illustrating the oil treatment means of Figure 2. Specific details for implementing the invention

[0039] Hereinafter, a preferred embodiment of the wastewater and foreign substance treatment device for a car wash according to the present invention will be described.

[0040] In the following description of the present invention, if it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the essence of the present invention, such detailed description will be omitted.

[0042] FIG. 2 is a schematic diagram illustrating a wastewater and foreign matter treatment device for a car wash according to the present invention, FIG. 3 is a schematic diagram illustrating a sediment treatment means of FIG. 2, and FIG. 4 is a schematic diagram illustrating an oil treatment means of FIG. 2.

[0044] As illustrated in FIGS. 2 to 4, the wastewater and foreign matter treatment device (1) of a car wash according to the present invention is,

[0045] A sedimentation tank (3) that collects wastewater discharged from a car wash and settles sediment from the collected wastewater;

[0046] A first discharge pipe (5) having one side installed inside the sedimentation tank (3) and the other side installed on the upper side inside the oil-water separation and collection tank to send wastewater stored in the sedimentation tank (3) to the oil-water separation and collection tank;

[0047] An oil-water separation and collection tank (7) installed at a certain distance from the above sedimentation tank (3) and collecting wastewater discharged from the first discharge pipe (5) and separating the collected wastewater into water and oil in the first step;

[0048] A control unit (9) installed at a certain distance from the above oil-water separation and collection tank (7);

[0049] A second discharge pipe (11) having one side installed inside the oil-water separation and collection tank (7) and the other side installed on the upper side inside the neutralization and coagulation tank to send the water primarily separated in the oil-water separation and collection tank (7) to the neutralization and coagulation tank;

[0050] An air supply unit (13) installed at a certain distance from the control unit (9) and electrically connected to the control unit (9) to send air to the neutralization and coagulation tank according to the control signal of the control unit (9);

[0051] A chemical supply unit (15) installed at a certain distance from the air supply unit (13) and electrically connected to a control unit (9) to supply chemicals to a neutralization and coagulation tank according to a control signal from the control unit (9);

[0052] A neutralization and coagulation tank (17) installed adjacent to the above-mentioned oil-water separation and collection tank (7), which collects the primarily separated water discharged from the second discharge pipe (5) and secondarily separates water and oil from the collected water, and also purifies the water primarily by neutralizing and coagulating the water with chemicals supplied by the supplied air;

[0053] A third discharge pipe (19) having one side installed inside the neutralization and coagulation tank (17) and the other side installed on the upper side inside the first treatment tank to send water that has been primarily purified in the neutralization and coagulation tank (17) to the first treatment tank;

[0054] A first water treatment tank (21) installed adjacent to the above neutralization and coagulation tank (17) and collecting primarily purified water discharged from the third discharge pipe (19) and secondarily purifying the collected water;

[0055] A fourth discharge pipe (23) having one side installed inside the first water treatment tank (21) and the other side installed on the upper side inside the second water treatment tank to send water that has been secondarily purified in the first water treatment tank (21) to the second water treatment tank;

[0056] A second water treatment tank (25) installed adjacent to the first water treatment tank (21) and collecting the secondarily purified water discharged from the fourth discharge pipe (23) and tertiarily purifying the collected water;

[0057] A car wash water pumping unit (29) installed at a certain distance from the above-mentioned chemical supply unit (15) and electrically connected to the control unit (9), pumping the tertiarily purified water stored in the second water treatment tank (25) according to the control signal of the control unit (9) and sending it to the car wash water storage unit (27) connected to the car wash device;

[0058] A sediment treatment means (31) installed at one side of the lower part of the sedimentation tank (3) at a certain distance from the first discharge pipe (5) above, which sucks in sediment settled inside the sedimentation tank (3) and dries the sucked-in sediment to easily remove odors from the sediment and allow the sediment to be disposed of;

[0059] It includes an oil treatment means (33) installed on one side of the upper part of the oil-water separation and collection tank (7) at a certain distance from the first discharge pipe (5), which sucks up oil located inside the oil-water separation and collection tank (7), mixes sawdust with the sucked-up oil, dries the mixed mixture, and processes the dried mixture into pellets so that it can be used as heating energy in winter.

[0061] And, a sediment sensing unit (35) for sensing sediment is installed on one side of the interior of the sedimentation tank (3).

[0062] The above sediment sensing unit (35) is electrically connected to the control unit (9) and senses the height of the sediment according to the control signal of the control unit (9).

[0064] And, an oil sensing unit (37) for sensing oil is installed on one side of the upper interior of the above oil-water separation and collection tank (7).

[0065] The above oil sensing unit (37) is electrically connected to the control unit (9) and senses the amount of oil according to the control signal of the control unit (9).

[0067] And, the above sediment treatment means (31) is,

[0068] A first hose (39) installed on one side of the lower part of the sedimentation tank (3);

[0069] A sediment collection unit (41) connected to the first hose (39) and electrically connected to the control unit (9) to suck up sediment settled inside the sedimentation tank (3) according to the control signal of the control unit (9) and send the sucked sediment to the first drying unit;

[0070] It includes a first drying unit (43) that is connected to the sediment collection unit (41) and electrically connected to the control unit (9), and dries the sediment supplied from the sediment collection unit (41) according to the control signal of the control unit (9) to remove odors from the sediment.

[0071] Here, a steam discharge unit (45) is installed on one side of the first drying unit (43) to discharge steam.

[0073] And, the above oil treatment means (33) is,

[0074] A second hose (47) installed on one side of the upper part of the above oil-water separation and collection tank (7);

[0075] An oil collection unit (49) connected to the second hose (47) above and electrically connected to the control unit (9) to suck up oil located inside the oil-water separation and collection tank (7) according to the control signal of the control unit (9) and send the sucked oil to the mixing unit;

[0076] A sawdust supply unit (51) positioned at a certain distance from the above oil-rejecting unit (49), electrically connected to the above control unit (9), and sending the stored sawdust to the mixing unit according to the control signal of the control unit (9);

[0077] A mixing unit (53) positioned at a certain distance from the above sawdust supply unit (51), electrically connected to the above control unit (9), and mixing the supplied oil and sawdust according to the control signal of the control unit (9) and sending the mixed mixture to the second drying unit (55);

[0078] A second drying unit (55) connected to the mixing unit (53) and electrically connected to the control unit (9) to dry the mixture supplied from the mixing unit (53) according to the control signal of the control unit (9) and send the dried mixture to the pellet processing unit;

[0079] It includes a pellet processing unit (57) that is connected to the second drying unit (55) and electrically connected to the control unit (9) to process the dried mixture supplied from the second drying unit (55) into pellets according to the control signal of the control unit (9).

[0081] The operation (or control method) of the wastewater and foreign matter treatment device (1) of the car wash according to the present invention, as described above, is as follows.

[0083] First, after washing a car at a car wash, the wastewater discharged is collected in the sedimentation tank (3), and foreign substances heavier than water among the wastewater collected in the sedimentation tank (3) are settled. Here, the foreign substances settled in the sedimentation tank (3) are referred to as sediment.

[0085] And, the wastewater collected in the sedimentation tank (3) is collected in the oil-water separation and collection tank (7) through the first discharge pipe (5), and the wastewater collected in the oil-water separation and collection tank (7) is separated into water and oil (or oil).

[0087] Then, the water collected in the above-mentioned oil-water separation and collection tank (7) is collected in the neutralization and coagulation tank (17) through the second discharge pipe (11), and the water collected in the above-mentioned neutralization and coagulation tank (17) is again separated into water and oil.

[0089] When water is collected in the neutralization and coagulation tank (17) as described above, the control unit (9) sends a control signal to the air supply unit (13) and the chemical supply unit (15).

[0090] The air supply unit (13) sends air to the neutralization and coagulation tank (17) according to the control signal of the control unit (9), and the chemical supply unit (15) supplies chemicals to the neutralization and coagulation tank (17) according to the control signal of the control unit (9).

[0092] As described above, when air and chemicals are supplied to the neutralization and coagulation tank (17), the chemicals supplied by the supplied air neutralize and coagulate the water collected in the neutralization and coagulation tank (17) to purify the water in the first step.

[0094] And, the water that is primarily purified in the above neutralization and coagulation tank (17) is collected in the first water treatment tank (21) through the third discharge pipe (19), and the water collected in the first water treatment tank (21) is secondarily purified.

[0096] And, the water that is secondarily purified in the first water treatment tank (21) is collected in the second water treatment tank (25) through the fourth discharge pipe (23), and the water collected in the second water treatment tank (25) is tertiarily purified.

[0098] When water is collected in the second water treatment tank (25) as described above, the control unit (9) sends a control signal to the car wash water pumping unit (29).

[0099] The above car wash water pumping unit (29) pumps the tertiarily purified water stored in the second water treatment tank (25) according to the control signal of the control unit (9) and sends it to the car wash water storage unit (27) connected to the car wash device.

[0101] Meanwhile, the control unit (9) sends a control signal to a sediment sensing unit (35) installed on one side inside the sedimentation tank (3).

[0102] The above sediment sensing unit (35) senses the height of the sediment according to the control signal of the control unit (9) and sends the sensed height value of the sediment to the control unit (9).

[0104] Then, the control unit (9) compares the height value of the pre-set sediment with the height value of the sensed sediment, and if the height value of the sensed sediment is greater than the height value of the pre-set sediment, it sends a control signal to the sediment collection unit (41).

[0105] The above sediment collection unit (41) sucks up the sediment settled inside the sedimentation tank (3) through the first hose (39) according to the control signal of the control unit (9) and sends the sucked-up sediment to the first drying unit (43).

[0107] And, the first drying unit (43) dries the sediment supplied from the sediment collection unit (41) according to the control signal of the control unit (9) to remove the odor from the sediment.

[0108] A steam discharge unit (45) is installed in the first drying unit (43) described above, and the steam discharge unit (45) discharges steam generated inside the first drying unit (43) to the outside.

[0110] On the other hand, the control unit (9) sends a control signal to an oil sensing unit (37) installed on one side of the upper interior of the oil-water separation and collection tank (7).

[0111] The above oil sensing unit (37) senses the amount of oil according to the control signal of the control unit (9) and sends the sensed amount of oil to the control unit (9).

[0113] And, the control unit (9) compares the preset oil amount with the sensed oil amount, and if the sensed oil amount is greater than the preset oil amount, sends a control signal to the oil rejection unit (49).

[0114] The above oil-water collection unit (49) sucks up oil located inside the oil-water separation and collection tank (7) through the second hose (47) according to the control signal of the control unit (9) and sends the sucked-up oil to the mixing unit (53).

[0116] And, the control unit (9) sends a control signal to the sawdust supply unit (51) and the mixing unit (53).

[0117] The above sawdust supply unit (51) sends the stored sawdust to the mixing unit (53) according to the control signal of the control unit (9).

[0118] The above mixing unit (53) mixes the supplied oil and sawdust according to the control signal of the control unit (9) and sends the mixed mixture to the second drying unit (55).

[0120] And, the control unit (9) sends a control signal to the second drying unit (55) and the pellet processing unit (57).

[0121] The second drying unit (55) dries the mixture supplied from the mixing unit (53) according to the control signal of the control unit (9) and sends the dried mixture to the pellet processing unit.

[0122] The above pellet processing unit (57) processes the dried mixture supplied from the second drying unit (55) into pellets according to the control signal of the control unit (9).

[0124] Accordingly, the present invention relates to a treatment device for wastewater and foreign substances (e.g., sediment, oil, etc.) discharged from a car wash. More specifically, it purifies wastewater to recycle the purified wastewater, facilitates the removal of odors from sediments formed in the wastewater to allow for the disposal of the sediments, and helps to process the oil (or grease) separated from the wastewater into pellets by mixing them with sawdust so that they can be used as heating energy during the winter.

[0126] Although the technical concept of the present invention has been described and illustrated in relation to several embodiments for exemplifying it, the present invention is not limited to the configuration and operation as described above, and those skilled in the art will understand that numerous changes and modifications can be made to the present invention without departing from the scope of the technical concept described in the specification. Accordingly, all such appropriate changes and modifications and equivalents should be considered to be within the scope of the present invention. Explanation of the symbols

[0128] 1: Car wash wastewater and foreign matter treatment device 3: Sedimentation tank 5: 1st discharge pipe 7: Oil-water separation and collection tank 9 : Control unit 11 : Second discharge pipe 13: Air supply unit 15: Chemical supply unit 17: Neutralization and coagulation tank 19: Third discharge pipe 21 : 1st Water Treatment Tank 23 : 4th Discharge Pipe 25: Second Water Treatment Tank 27: Car Wash Water Storage Unit 29 : Car wash water pumping unit 31 : Sediment treatment means 33 : Oil treatment means 35 : Sediment sensing unit 37 : Oil sensing unit 39 : No. 1 hose 41: Sediment collection section 43: 1st drying section 45 : Steam discharge section 47 : 2nd hose 49 : Oil-rejecting unit 51 : Sawdust supply unit 53: Mixing section 55: Second drying section 57 : Pellet Processing Department

Claims

Claim 1 A sedimentation tank (3) for collecting wastewater discharged from a car wash and settling sediment from the collected wastewater; a first discharge pipe (5) with one side installed inside the sedimentation tank (3) and the other side installed on the upper side inside the oil-water separation and collection tank to send wastewater stored in the sedimentation tank (3) to the oil-water separation and collection tank; an oil-water separation and collection tank (7) installed at a certain distance from the sedimentation tank (3) to collect wastewater discharged from the first discharge pipe (5) and to primarily separate the collected wastewater into water and oil; a control unit (9) installed at a certain distance from the oil-water separation and collection tank (7); and a control unit with one side installed inside the oil-water separation and collection tank (7) and the other side installed on the upper side inside the neutralization and coagulation tank to send the water primarily separated in the oil-water separation and collection tank (7) to the neutralization and coagulation tank. A second discharge pipe (11); an air supply unit (13) installed at a certain distance from the control unit (9) and electrically connected to the control unit (9) to send air to the neutralization and coagulation tank according to the control signal of the control unit (9); a chemical supply unit (15) installed at a certain distance from the air supply unit (13) and electrically connected to the control unit (9) to supply chemicals to the neutralization and coagulation tank according to the control signal of the control unit (9); a neutralization and coagulation tank (17) installed adjacent to the oil-water separation and collection tank (7) to collect the water primarily separated from the second discharge pipe (5) and secondarily separate water and oil from the collected water, and also to purify the water primarily by neutralizing and coagulating the water with chemicals supplied by the supplied air; and one side installed inside the neutralization and coagulation tank (17) and the other side installed on the upper side inside the first treatment tank A third discharge pipe (19) that sends water primarily purified in a neutralization and coagulation tank (17) to a first treatment tank; and a first water treatment tank (21) installed adjacent to the neutralization and coagulation tank (17) and collecting the water primarily purified discharged from the third discharge pipe (19) and secondarily purifying the collected water;A fourth discharge pipe (23) having one side installed inside the first water treatment tank (21) and the other side installed on the upper side inside the second water treatment tank to send water that has been secondarily purified in the first water treatment tank (21) to the second water treatment tank; a second water treatment tank (25) installed adjacent to the first water treatment tank (21) to collect water that has been secondarily purified and discharged from the fourth discharge pipe (23) and to purify the collected water a third time; a car wash water pumping unit (29) installed at a certain distance from the chemical supply unit (15) and electrically connected to the control unit (9) to pump water that has been thirdarily purified and stored in the second water treatment tank (25) according to the control signal of the control unit (9) and send it to a car wash water storage unit (27) connected to a car wash device; and installed at one side of the lower part of the sedimentation tank (3) at a certain distance from the first discharge pipe (5). The apparatus includes a sediment treatment means (31) that sucks in sediment settled inside the sedimentation tank (3) and dries the sucked-in sediment to easily remove odors from the sediment so that the sediment can be disposed of; and an oil treatment means (33) that is installed on one side of the upper portion of the oil-water separation and collection tank (7) at a certain distance from the first discharge pipe (5), sucks in oil located inside the oil-water separation and collection tank (7), adds sawdust to the sucked-in oil to mix it, dries the mixed mixture, and processes the dried mixture into pellets to help it be used as heating energy in winter, wherein the oil treatment means (33) comprises a second hose (47) installed on one side of the upper portion of the oil-water separation and collection tank (7); and is connected to the second hose (47) and electrically connected to the control unit (9) to suck in oil located inside the oil-water separation and collection tank (7) according to the control signal of the control unit (9), and the sucked-in An oil rejection unit (49) that sends oil to a mixing unit; and a sawdust supply unit (51) positioned at a certain distance from the oil rejection unit (49), electrically connected to the control unit (9), and sending the stored sawdust to the mixing unit according to the control signal of the control unit (9);A wastewater and foreign matter treatment device for a car wash, characterized by comprising: a mixing unit (53) positioned at a certain distance from the above-mentioned sawdust supply unit (51) and electrically connected to the above-mentioned control unit (9) to mix the oil and sawdust supplied according to the control signal of the control unit (9) and send the mixed mixture to the second drying unit (55); a second drying unit (55) connected to the above-mentioned mixing unit (53) and electrically connected to the above-mentioned control unit (9) to dry the mixture supplied from the mixing unit (53) according to the control signal of the control unit (9) and send the dried mixture to the pellet processing unit; and a pellet processing unit (57) connected to the above-mentioned drying unit (55) and electrically connected to the above-mentioned control unit (9) to process the dried mixture supplied from the second drying unit (55) into pellets according to the control signal of the control unit (9). 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