KR200236077Y1 - A waste water disposal plant with a fiter and a settling tank - Google Patents

Abstract

The present invention relates to a wastewater treatment apparatus using a pretreatment sedimentation tank and a suspension filter, the wastewater passing through the flow rate adjusting tank 20 and the flow rate adjusting tank 20 is introduced, acid / alkaline chemicals are introduced and a predetermined amount of wastewater is Floating material in the water by mixing the flocculant in the metering tank 30, the precipitation tank 40, the collection tank 50, and the waste water passing through the collection tank 50, which is re-introduced into the flow rate adjustment tank 20 and the pH sensor is installed. It consists of a flocculant mixer 60 to agglomerate, a suspension filter 70 to filter the sludge agglomerated by the flocculant mixer 60, the treatment discharge tank 80, the pH simply through the metering tank 30 Concentrations can be measured, physical treatment and chemical treatment can be performed simultaneously, and biological treatment can be applied.

Description

A waste water disposal plant with a fiter and a settling tank}

The present invention relates to a wastewater treatment device, and particularly, to a wastewater treatment device using a pretreatment sedimentation tank and a suspension filter which can perform deep filtration by adding a chemical coagulant such as alumina sulfate or iron chloride, and easily measure and adjust the pH concentration of the wastewater. It is about.

In general, wastewater treatment can be classified into physical treatment, chemical treatment, and biological treatment. Most wastewater treatment devices vary in composition depending on major pollutants, but they are used in combination.

The wastewater treatment system using the conventional chemical treatment method is composed of a sedimentation tank, a flow control tank, a chemical reaction tank, a metering tank, a neutralization and polymer agglomeration tank, a sedimentation tank, a sludge concentration tank, a treatment discharge tank, and chemical precipitation using additives or activated carbon. The purpose of the treatment is to be achieved.

Wastewater treatment apparatus using a conventional physical treatment method is to achieve the purpose of treatment by using a screen and crusher, gravity sedimentation, flotation, filtration and the like.

As shown in FIG. 1, a wastewater treatment apparatus employing a conventional biofilm filtration method includes a screen tank for separating contaminants, a flow rate adjustment tank for uniform transport of wastewater, a biofilm filter tank for decomposing and removing contaminants in the wastewater, and treated water. It is composed of a treatment tank for temporary storage and cleaning of filter medium of a biofilm filtration tank, a sludge separator for precipitating and separating microbial sludge grown in a biofilm filtration tank, and a sludge concentration storage tank having a long-term storage function of sludge.

Conventional physicochemical treatment devices are more complicated than biofilm filtration and require the use of chemical agglomeration and polymer coagulant in parallel. In addition, the biofilm filtration method has a limitation in its application because the biofilm filter cannot be used as a conventional physicochemical treatment device.

In addition, there was a problem that a separate pH adjustment tank should be provided to measure the pH concentration.

The present invention has been devised to solve the above problems, by installing a sensor for measuring the pH concentration of the waste water in the metering tank to adjust the pH concentration, by sedimentation of suspended solids and sludges of relatively large size The purpose of the present invention is to provide a pre-treatment settling tank that can filter sludge and a chemical flocculation treatment, and a wastewater treatment device using a pre-treatment settling tank that can filter fine sludge by means of deep filtration and a suspended filter.

The present invention for achieving the above object, the flow adjustment tank, the waste water passing through the flow adjustment tank is introduced into the acid / alkaline chemicals and a certain amount of waste water is re-introduced into the flow adjustment tank and the pH sensor is installed It consists of a metering tank, a sedimentation tank, a sump tank, a flocculant mixer for agglomeration of suspended solids in the water by mixing a flocculant with the wastewater that has passed through the sump, a flotation filter for filtering sludge agglomerated by the flocculant mixer, and a treatment discharge tank. .

Therefore, chemical flocculant treatment agents such as alumina sulfate or iron chloride are added to the flocculant mixer to form sludge, filtered through a suspended filter filter, acid / alkaline chemicals are added to the measuring tank, and a pH sensor can be installed to easily measure pH concentration. Will be.

1 is a flow chart showing a biological wastewater treatment apparatus according to the prior art,

Figure 2 is a block diagram showing a wastewater treatment apparatus using a pre-treatment settling tank and suspended filter medium according to the present invention,

3 is a flow chart of a wastewater treatment apparatus using a pretreatment sedimentation tank and a suspended filter according to the present invention.

Explanation of symbols on the main parts of the drawings

10: sedimentation tank 20: flow adjustment tank

30: weighing tank 31: first stage

32: second stage 33: third stage

34: pH sensor 35: conveying line

36: acid / alkali feeder 40: sedimentation tank

41: sludge dry phase 42: sludge discharge electric valve

50: sump tank 60: flocculant mixer

61: flocculant feeder 70: suspended media filter

71: treated water discharge electric valve 72: backwash water discharge electric valve

80: treatment effluent tank 81: backwash pump

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram showing a wastewater treatment apparatus using a pretreatment sedimentation tank and a suspension filter according to the present invention, Figure 3 is a flow chart of a wastewater treatment apparatus using a pretreatment sedimentation tank and a suspension filter according to the present invention.

According to the present invention according to the drawings, the flow control tank 20 for temporarily storing the waste water from which the solid matter is separated and adjusting the flow rate, the first stage 31, the second stage 32 and the third stage 33. Waste water passing through the flow adjustment tank 20 into the first stage 31 is introduced into the acid / alkaline chemicals and the first stage 31 and the second stage 32 is the flow rate adjustment tank ( 20) is communicated through the conveying line 34 so that a predetermined amount of waste water is re-introduced into the flow adjusting tank 20, and the third end 33 is provided with the first end 31 and the second end 32. A metering tank 30 provided with a pH sensor 34 for measuring the pH concentration of the wastewater passed through, a settling tank 40 for depositing activated sludge of the wastewater passing through the metering tank 30 to discharge only the wastewater, and the A collecting tank 50 for temporarily storing the wastewater that has passed through the settling tank 40, and a coagulant which aggregates the suspended solids in the water by mixing a coagulant with the wastewater passing through the collecting tank 50. Aeration filter (60) for collecting and discharging the treated water passed through the air filter (60), the deep filter (70) for filtration of sludge aggregated by the coagulant mixer (60), and the suspended filter (70). It consists of a structure.

The features of the present invention having the above structure is that the chemical feeder (34) is connected to the metering tank (30) and the coagulant mixer (60) and the flocculant filter (70), the coagulant mixer (60) Sludge is formed by adding a polymer flocculant, and it is filtered through a suspended filter strainer 70, an acidic / alkaline chemical is added to the measuring tank 30, and a pH sensor 34 is installed so that pH concentration can be easily measured. .

The sedimentation tank 10 is installed to prevent the deterioration of treatment functions due to sedimentation and sedimentation of the structure and the structure of the pump after the sedimentation tank by removing and removing sediment and sediment in the influent wastewater.

The flow rate adjustment tank 20 serves to maintain a constant amount of wastewater that has passed through the settling tank 10.

The metering tank 30 is composed of a first stage 31, a second stage 32 and a third stage 33, and the wastewater flows into the first stage 31 from the flow rate adjusting tank 20. In addition, acid / alkaline chemicals are introduced by the chemical feeder 36, and a conveying line 35 is installed at the first stage 31 and the second stage 32 to return a predetermined amount of wastewater to the flow rate adjusting tank 20. In the third stage 33, a pH sensor 34 is installed to adjust the pH concentration of the waste water more precisely.

Therefore, it is possible to easily measure the pH concentration of the wastewater without having a separate pH measuring tank.

The sedimentation tank 40 is to settle the suspended solids of the wastewater that passed through the metering tank 30, and remove the sludge, sedimented sludge is collected in the hopper in the center of the sedimentation tank, the sludge discharge automatic valve installed at the bottom of the sedimentation tank By the opening of (42), it is periodically discharged to the sludge dry bed 41 or sent to the concentrating tank and the dehydrator, and the supernatant water is reintroduced into the sump tank 50.

Since the sludge of the sludge dry bed 41 contains a liquid, a predetermined amount is again introduced into the flow rate adjusting tank 20 to filter the sludge.

The water collecting tank 50 serves as a place for temporarily storing the wastewater introduced from the sedimentation tank 40 to constantly supply the amount of wastewater to the suspended filter strainer 70.

The flocculant mixer 60 is formed between the sump tank 50 and the flocculant filter 70 by mixing the polymer flocculant with the wastewater to remove the colloidal fine suspended solids attached to the polymer flocculant to form sludge. The feeder 61 is connected.

The suspended filter 70 serves to filter the sludge by passing the sludge-formed wastewater through the flocculant mixer 60, and the chemical coagulated sludge deposited in the filter is sludge by periodic backwashing of the filter. Is removed by gravity precipitation.

In addition, the suspended filter strainer 70 is automatically operated in the operation of the suspended filter strainer 70, the treated water passing through the filter is transferred to the treatment discharge tank by opening the treated water discharge automatic valve 71, the suspended filter strainer During backwashing, if the backwashing pump 81 installed in the treatment discharge tank 80 is operated, the treated water discharge automatic valve 71 is locked, and the backwash water discharge automatic valve 72 is opened, so that the backwash water flows at the front end. It is transferred to the adjustment tank 20.

That is, the suspended filter 70 is applied to the biofilm filter of the biological treatment method, it may be used in parallel with the biological treatment using the biofilm filter as it is, but simply to treat and filter out contaminants in the waste water by the chemical treatment method It is possible to play a role.

On the other hand, the suspended filter strainer 70 is connected to a plurality of suspended filter strainer 70 in parallel to be used to adjust the number of operating according to the wastewater generation flow rate, the maintenance of the suspended filter strainer 70 independently It is desirable to make it possible to allow continuous processing without affecting the overall operation.

Here, the chemical flocculating sludge generated by the flocculant is returned to the flow rate adjusting tank 20 by back washing of the suspended filter strainer 70 and finally, precipitated and treated in the settling tank.

The treatment discharge tank 80 is a place to allow the wastewater that has passed through the suspended filter strainer 70 to be discharged.

Therefore, the pH concentration can be simply measured through the metering tank 30, and the physical treatment can be performed by the settling tank 10, the settling tank 40, and the collecting tank 50, and the flocculant mixer 60 By introducing a chemical coagulation treatment agent into the wastewater through the biological filter filtration can be applied to the biofilm filtration tank to enable chemical treatment through the suspended filter strainer (70).

<Example>

An example of chemical treatment of car wash wastewater using a suspended filter. The residence time of the suspended filter was 8-10 minutes, and the input amount of alumina sulfate was 20ppm.

Filter residence time (minutes) Item Influent (mg / L) Treated water (mg / L) Processing efficiency (%) Remarks 8 CODmn 52 13.5 74.0 ALUM 20ppm input SS 124 1.0 99.2 10 CODmn 52 12.3 76.5 ' SS 124 1.0 99.2 pH 6.7 6.5 -

Comparative Example

Item Drug dosage (mg / L) Retention time (minutes) Analysis item Influent (mg / L) Treated water (mg / L) Processing efficiency (%) Yellow clay Polymer coagulant Chemical flocculation 100 2 20 CODmn 52 17.5 66.3 SS 124 7.5 94.0 Suspension Filter 20 - 10 CODmn 52 12.3 76.5 SS 124 1.0 99.2 pH 6.7 6.5 -

Comparison of the chemical treatment by general chemical flocculation sedimentation method and the chemical treatment using the flotation filter for the car wash wastewater using the flotation filter showed that the chemical treatment method using the flotation filter in residence time, treatment efficiency and chemical input Appeared.

As described above, according to the wastewater treatment apparatus using the pretreatment sedimentation tank and the flocculation filter according to the present invention, it is possible to apply the biofilm filtration tank which is a biological treatment facility and use it as a wastewater treatment facility for the purpose of physicochemical treatment. The amount of treatment used is only 40-50% of the existing method, and it does not require the use of polymer coagulants. It automates the chemical treatment process that is difficult to automate, thereby automating the physicochemical treatment process in places without expert managers such as car wash wastewater and tunneling wastewater. Not only can it be applied, but also it does not need a separate pH adjustment tank by simplifying the chemical treatment process, and the chemical flocculation sludge filtered from the suspended media filter is passed through the flow rate adjustment tank at the front end by the backwashing of the filter without additional chemical input. Inflow to the sedimentation tank improves the sedimentation function have.

Claims (3)

A flow rate adjustment tank 20 for temporarily storing the wastewater from which the solid matter is separated and adjusting the flow rate; Acid / alkaline chemicals are measured and added to the wastewater that has passed through the flow adjusting tank 20, and the waste water of the predetermined amount is re-introduced into the flow adjusting tank 20 by communicating with the conveying line 34 to the flow adjusting tank 20. A metering tank 30 having a pH sensor 34 for measuring the pH concentration of the waste water; A settling tank 40 for discharging activated sludge of the wastewater passing through the metering tank 30 to discharge only the wastewater; A water collecting tank 50 for temporarily storing the wastewater passing through the settling tank 40; A coagulant mixer (60) for agglomeration of suspended solids in water by mixing a coagulant with the wastewater passing through the sump (50); Suspension filter 70 for deep filtration of the sludge aggregated by the flocculant mixer (60); Wastewater treatment apparatus using a pre-treatment sedimentation tank and a suspended media filter consisting of a treatment discharge tank (80) for collecting and discharging the wastewater passing through the suspended media filter (70). According to claim 1, wherein the metering tank 30 is composed of a first stage 31, the second stage 32 and the third stage 33, the first stage 31, the flow rate adjustment tank 20 Wastewater passing through) is introduced and acid / alkaline chemicals are introduced, and the conveying line 35 is installed in the first stage 31 and the second stage 32, and the third stage 33 is installed in the third stage 33. Wastewater treatment apparatus using the pre-treatment settling tank and suspended filter medium, characterized in that the pH sensor 34 is installed. The wastewater treatment according to claim 1, wherein the flocculant mixer 60 uses alumina sulfate, iron chloride, PAC (ploy aluminum chloride), etc. instead of the polymer flocculant as a chemical flocculant. Device.