KR20050030084A - Small sewage terminal treatment device and method - Google Patents

Abstract

To provide a process for treating sewage wastewater, which miniaturizes a treating apparatus and significantly reduce required land by increasing the treating efficiency. Raw water is flown in a flocculation tank to be flocculated. The flocculated water is flown in an exit chamber of a rectangular, dissolved air floatation tank. Ultrafine bubbles having a size of 3 microns, which are exited and diffused in the exit chamber, are attached and adsorbed to suspended solids, compulsorily floated to the water surface and transferred to a separation chamber to be separated into sludge and supernatant. The separated sludge is transferred to a sludge recovery chamber by the operation of a skimmer. The separated supernatant transferred to a supernatant chamber is transferred to a biological membrane treating tank where dissolved organic materials is decomposed and treated water is transferred to a discharge chamber. The water quality of the transferred treated water is detected by a control device of discharge water quality. When the detected water quality is less than a discharge reference level, the treated water is re-treated at the dissolved air floatation tank or the biological membrane treating tank. The sludge separated from the separation chamber is transferred to a sludge natural filtration and dehydration device to naturally filter and dehydrate the sludge.

Description

Small sewage terminal treatment apparatus and method {omitted}

The present invention relates to a small sewage terminal treatment apparatus and method, and more particularly, to a small sewage terminal treatment apparatus and method for miniaturizing the device by increasing the treatment efficiency and greatly reduce land consumption.

In domestic sewage treatment, the conventional treatment window and method will be described in the construction of a large-scale sewage treatment plant centered on an active sludge treatment method by constructing an activated sludge treatment tank focused on civil engineering in a certain area, and transporting sewage. To this end, a dedicated sewage pipe is installed underground to connect the sewage discharge destination and the terminal treatment plant to each other, and the living sewage discharged is transferred to the treatment plant for purification.

The large-scale treatment method requires a lot of sewer pipes underground, so it is very expensive. Also, if the underground pipes are broken, sewage penetrates underground and contaminates groundwater. In addition, it is difficult to secure a lot of land in one place during the construction of the treatment plant, as well as causing friction with neighboring residents about the construction, and flowing sewage through underground pipelines. There are many problems such as loss of the original function of the Mala river.

In order to solve the above problems, the present invention performs a flocculation treatment by chemical treatment in a conventional flocculation tank, and introduces the flocculation water into a flotation separation tank to carry out flotation separation treatment by ultra-micro-foaming sludge and supernatant water. The separated supernatant is subjected to biofilm treatment to which an anoxic treatment chamber is imposed, and the treated water that has undergone biofilm treatment is transferred to the discharge chamber for discharge, and the discharge water quality control device is installed in the discharge chamber to transfer the treated water to the discharge chamber. It continuously detects the water quality and circulates when the discharge rate is lower than the discharge standard value so that it can be reprocessed and discharged when the discharge limit value is reached, thereby preventing the discharge of treated water below the discharge standard value. Filtered and naturally dehydrated at a constant moisture content, so that dehydration treatment is performed while eliminating the concentration facility. It is aimed to provide a small-scale sewage treatment apparatus and method.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a view showing the connection and processing flow of the entire required device, T is the collection and adjustment tank, T-1 is the flocculation tank, T-2 is the flotation tank, T-3 is the biofilm treatment tank, T-4 is the sludge Filtration and natural dehydration system, 101 is ultra-micro bubble generator, 102 is compressor, R is discharge water quality control device.

A raw water feed pump (P) is installed in the collecting and adjusting tank (T), and the feed pipe (1) is connected to the pump, and connected to the coagulation tank (T-1), and the open / close solenoid valve (V) is provided in the pipe. As it is installed and opened and closed by the discharge water quality control device R, the raw water flowing into the coagulation tank T-1 is reversely introduced into the collection / adjustment tank T.

Agglomeration tank (T-1) is divided into a chamber, a chamber, and a chamber, a coagulant injection pipe (13) is installed above each chamber, and a sensor (13-1) connected to a PHC is installed in the chamber and a chamber. In the lower part of each chamber, a compressed air diverging device (2) is installed for stirring the air, which is connected to the blower (W) through a required pipe, and the floating separation tank (T-2) at the upper side of the chamber. A conveying pipe is installed to transfer the agglomerated water to

The floating separation tank (T-2) is a rectangular pipe-type floating separation tank divided into A, B, C, D, and E threads, and the A chamber is a discharge chamber, and a discharge valve (3) for discharging and spreading ultra-fine cloth is installed in the lower part. The upper side is provided with a pipe for introducing coagulated water from the coagulation tank (T-1) and a circulating pipe (9) for inflowing effluent water that has not reached the discharge standard value, and the B and C yarns are sludge as flotation separation chambers. And the supernatant is separated, and a skimmer is installed on the upper side, and the D chamber is a sludge recovery chamber to recover the sludge introduced by the operation of the skimmer, and the E chamber is a supernatant chamber that separates and discharges the supernatant from the bottom. While storing, the natural transfer to the biofilm treatment tank (T-3) through the required pipe,

The biofilm treatment tank (T-3) is divided into F chamber, G chamber, and J chamber, and the F chamber and G chamber are biofilm treatment chambers, and are equipped with bio-locks that allow microorganisms to grow and form a film. In order to shorten the processing time, a bio-lock is mounted at a high density, and the micro-foam discharge device 6 is installed at the bottom of the double chamber F.G. Connected to the strength generator, the dissolved oxygen in the water in both biofilm treatment chambers (F · G) is controlled by the discharge and diffusion of the ultra-micro-intensity foam. It is characterized by the fact that it is possible to freely and efficiently adjust the dissolved oxygen dissolved in the room. Circulating pipe (9) for inflowing It is, and the effluent chamber (J) has a water discharge control device (R) for controlling the discharge of the treated effluent to less than the reference value, and in the effluent discharge are laid in an outward direction,

The filtration and natural dewatering device (T-4) performs the filtration and natural dewatering treatment by introducing the recovered sludge. The device is divided into two chambers of ① · ② with cylindrical tanks connected in pairs. ① · ②) is operated independently, and the inside is equipped with a filtration device consisting of a filter network, when the sludge is introduced, the water introduced with the sludge is immediately filtered out, and a pipe 12 for transporting the filtrate at the bottom is installed. Connected to the collecting and adjusting tank, and the filtered water is transferred to the collecting and adjusting tank through the pipe, and the opening and closing device 11 is mounted at the lower side of each chamber (① and ②) to open and close when discharging the sludge stored in the apparatus. The sludge feed pipe 10 is installed on the upper side and connected to the sludge recovery chamber D of the floating separation tank T-2, and the selector valve 10-1 is attached to the pipe and alternately to the ① chamber and the ② chamber. Sludge is introduced into the furnace, As it has the rest time, the water that is in the idle time containing sludge dewatering and filtration, natural progress,

The ultra-fine foam generator 101 is connected to the clarification chamber through the bubble water supply pipe (7) to receive the bubble water, and to receive the compressed air from the compressor (102) to generate the ultra-fine foam pipe (4) Pressurize the bubble water generated through 5) to the discharge valve 3 and the discharge device 6,

Compressor 102 compresses air at a predetermined pressure, pressurizes the compressed air into the ultra-fine foam generator,

The discharge water quality control device (R) continuously detects the treated water flowing into the discharge chamber (J), and causes the treated water to circulate when the discharged water reaches the discharge standard is circulated to perform reprocessing. -1), the controller (R-2), the circulation pump (R-3) and the open / close solenoid valve (V) are connected to each other, and the circulation pipe (9) is connected to the circulation pump (R-3) to separate the float. It is connected to the discharge chamber A of the tank and the G chamber of the biofilm treatment tank, and a selection valve 8 is attached to this pipe to selectively determine the inflow position of the circulating water.

The above apparatuses are connected to each other so that the small sewage treatment equipment is constructed.

The operation of the embodiment configured as described above will be described.

By the operation of the blower (W), the air is compressed and pumped to the compressed air diverter (2) through the required pipe and the diverter disperses the compressed air to the coagulation tank (T-1), and the air is stirred. On the other hand, while the ultra-mini-foaming device 101 operates, bubble water is supplied from the bubble-water supply pipe, compressed air is compressed from the compressor 102, and ultra-mini-foam is generated, and the generated ultra-mini-foam is transferred to the pressure pipe (4). ) Is discharged to the discharge valve 3 of the floating separation chamber discharge chamber A, and the discharge valve discharges and diffuses a 3 micron ultra-fine foam to the discharge chamber A.

Raw water is transferred and introduced into the coagulation tank (T-1), a neutralized and reactive agent of a predetermined type is injected into the chamber and the chamber, and the injection amount is adjusted as the PH value. Agglomeration is made while a predetermined amount of agglomeration is injected, and this agglomerated water is naturally transported to the discharge chamber A of the floating separation tank T-2.

Suspended matter in the agglomerated water conveyed and introduced into the discharge chamber A forms a full lock, which is then adsorbed and adhered to the 3 micron ultra-fine foam that is continuously discharged and diffused into the discharge chamber and forced onto the water surface. The sludge layer which floats and forms a sludge layer on the water surface is naturally transported to the flotation separation chamber (B · C) to separate suspended solids and supernatant water, and the sludge layer is operated by a skimming machine (S). Forced transfer to the sludge recovery chamber (D) is transferred to the sludge filtration natural dehydration apparatus (T-4) through the sludge transfer pipe 10, while the separated supernatant is transferred to the supernatant chamber (E) along the lower transfer passage. As it is stored and is naturally transferred to the biofilm treatment tank (T-3) through the transfer pipe of the required.

The supernatant transferred to the F chamber of the biofilm treatment tank (T-3) stays for a predetermined time while sequentially passing through the G chamber. During this residence time, the dissolved organic matter in the water contacts the microorganisms for decomposition. , The treated water is transferred to the discharge chamber (J) along the transfer path, the treated water flowing into the discharge chamber is detected by the discharge quality control device to the value below the discharge standard value, the controller (R-2) is the raw water transfer pipe At the same time as closing the solenoid valve (V) attached to (1) and operating the circulation pump (R-3), the treated water transferred to the discharge chamber is circulated to the discharge chamber (A) of the floating tank (T-2) and The treatment is carried out, and the treated water reprocessed by this operation flows back into the discharge chamber, and the discharge quality control device senses the value reaching the discharge standard value, and the controller controls the solenoid valve V installed in the raw water feed pipe. The operation of the circulation pump at the same time Sikimeuroseo the treated effluent entering chamber is to be discharged to the outside is prevented to the effluent discharge of the effluent below a reference value.

On the other hand, the sludge conveyed to the sludge filtration and natural dewatering device (T-4) through the sludge conveying pipe 10 is introduced into the ① chamber by the selector valve 10-1, and the amount of sludge from the bottom due to the sludge continuously introduced When it reaches a certain amount, the sludge flows into the ② chamber by the operation of the selector valve 10-1. After that, ① the chamber has a rest time, and the water containing the sludge undergoes filtration and natural dehydration treatment. After a certain time, the lower opening and closing device 11 is opened to discharge the sludge to the outside and close again to enter the standby state.

The ultra-fine foam generator 101 is a line mixer type device, which generates and discharges a super-micro-energy cloth having a size of 3 microns at high concentration around 20 seconds.

Floating separation tank (T-2) is a rectangular pipe type floating separation tank divided into discharge chamber (A), float separation chamber (B, C), sludge recovery chamber (D), and upper water chamber (J). The water is separated and floated at the residence time of about 8 minutes. In this process, more than 95% of the suspended solids such as phosphorus and nitrogen suspended in the water are removed.

The biofilm treatment tank (T-3) operates one chamber of the F chamber and the G chamber as an oxygen-free chamber according to the organic substance dissolved in the water, so that the hardly decomposable substance is efficiently removed.

The discharge water quality control device operates as a standardized value in conjunction with the COD value.

The present invention greatly reduces the processing time due to the miniaturization of the device and greatly reduces the required land, and prevents unintentional damage by preventing the discharge of treated water below the discharge standard due to a sudden change in inflow water quality or a malfunction of the device. It is possible to avoid friction with the residents by significantly reducing odor by omitting the concentration process in the sludge treatment, and it is easy to purchase required land in the construction of treatment facilities due to the miniaturization of the device, and face the opposition of the residents. Can be reduced.

1 is a block diagram of a device

<Explanation of symbols for main parts of drawing>

T collection tank T-1 coagulation tank

T-2 Flotation Tank T-3 Biofilm Treatment Tank

T-4 Filtration Natural Dewatering Device R Discharge Water Quality Control Device

R-1 water quality detection device R-2 circulation pump

R-2 Controller V Solenoid Valve

101 Ultra-Micro Bubble Generator 102 Compressor

A Discharge chamber B / C Floating separation chamber

D Sludge Collection Room E Upper Room

F · G Biofilm Treatment Room J Discharge Room

P Raw Water Pump S Schimmer

W blower

1 Raw water feed pipe 2 Compressed air divergent

3 Discharge Valve 4 Pressure Pipe

5 Pressure pipe 6 Discharge device

7 Bubble water supply pipe 8 Selection valve

9 Circulation Pipe 10 Sludge Transfer Pipe

10-1 Selection Valve 11 Switchgear

12 Transfer pipe 13 Coagulant injection pipe

13-1 PH Sensor

Claims (4)

Agglomerated water obtained by injecting raw water into the coagulation tank (T-1) and performing coagulation treatment is introduced into the discharge chamber (A) of the rectangular pipe-shaped float separation tank (T-2) and discharged and diffused into the discharge chamber (A). The 3 micron ultra-micro-foam is attached to and adsorbed on the floating material formed by the fulllock, forced to float to the surface, and transported to the separation chamber (B · C), where the sludge and the supernatant are separated, and the sludge separated by the operation of the skimmer The separated supernatant is transferred to the recovery chamber (D), while the separated supernatant is transferred to the supernatant chamber, and then transferred to the biofilm treatment tank (T-3), where it stays in contact for a while and dissolved in organic matter in the water. The water is transferred to the discharge chamber (J), and the processed water is detected by the discharge water quality control device to determine whether the discharge water reaches or reaches a predetermined discharge standard value. To the tank (T-3) for reprocessing The sludge separated in the flotation separation chamber is transferred to the sludge filtration natural dehydration device (T-4) and discharged to the outside after filtration and natural dehydration treatment is performed. Sewage treatment method. The rectangular pipe-type floating separation tank (T-2) according to claim 1, which is divided into a discharge chamber (A), an injury separation chamber (B · C), a sludge recovery chamber (D), and a supernatant water chamber (J). Small-scale sewage terminal treatment method characterized in that the separation of the flotation by discharging the ultra-micron cloth of microns. The biofilm treatment tank according to claim 1, wherein a bio-lock of high density is attached to the biofilm treatment tank, and ultra-violet bubbles are released to control dissolved oxygen, and two chambers (F.G) of the biofilm treatment tank (T-3) are used. Small sewage terminal treatment method, characterized in that the operation of one of the chambers to an oxygen-free room to improve the treatment efficiency. The small scale sewage treatment of claim 1, wherein one of the F and G chambers of the biofilm treatment tank (T-3) is operated as an anaerobic chamber to promote the growth of anaerobic microorganisms to remove hardly decomposable substances. Way.