KR0132367B1 - Equipment for anaerobic waste water treatment - Google Patents

Abstract

The present invention is about an apparatus of processing waste water for anaerobic treatment using fluidity biological reaction being in use carrier which doesn't degenerate treatment effect in operation for many hours. An apparatus of processing waste water for anaerobic treatment comprise liquidity biological reactor which treat waste water with carrier put in microorganism; influx water pump to flow waste water in liquidity biological reactor; carrier trap formed ultrasonic wave oscillator inside to remove overgrown biological membrane and carrier label sensor to operate ultrasonic wave oscillator by perceive amount of carrier; precipitation tank laid a pipe connecting with reactor to remove by precipitating waste sludge from treated waste water; carrier recycling device formed valve and recycling pump.

Description

Anaerobic Treatment Wastewater Treatment System

1 is a schematic process diagram of the wastewater treatment apparatus of the present invention,

2 is a schematic process diagram showing another example of the apparatus of the present invention.

* Explanation of symbols for main parts of the drawings

1: wastewater 2: influent pump

3: fluidized bed reactor 4: carrier

5: carrier trap 6: ultrasonic oscillator

7 carrier level sensor 8 recirculation pump

9: settling tank 10: waste sludge

11: treated water 12-17: valve

18: circulation pipe

The present invention relates to a wastewater treatment apparatus for anaerobic treatment using a fluidized bed bioreactor using a carrier, and more particularly, in a wastewater treatment apparatus using a fluidized bed bioreactor using a carrier, the carrier outside the reactor. By installing a trap and equipped with an ultrasonic oscillator operated by a level sensor, it washes the carrier with the increased thickness of the biofilm and recycles it to the reactor so that it can maintain the efficiency of wastewater treatment without damage to the carrier even after long-term use. It is about.

Various pollution problems have been discussed in the world, and in recent years, the pollution of the living environment has become more serious in our country due to the rapid increase of urban population and the rapid development of various industries. Moreover, pollution by sewage and industrial wastewater is one of the most pressing issues that threaten human health and life and endanger the life of natural life.

Currently used wastewater treatment methods include physical, chemical and biological methods, and biological methods suitable for the treatment of wastewater containing mainly organic compounds are classified into aerobic treatment and anaerobic treatment.

In particular, the anaerobic treatment method has been recently used because of the advantage that it can be applied to high concentration wastewater and less sludge generation.

However, there is a drawback that it is difficult to process a large capacity due to the slow processing speed, and in order to solve this problem, the treatment speed is improved by immobilization of cells and fluidization of a carrier which can maintain a high concentration of cells.

In the anaerobic wastewater treatment system using a bioreactor, when a fluidized bed reactor using a carrier is operated for a long time, the flow conditions set at the beginning of operation are broken while increasing the thickness of the fixed biofilm attached to the carrier.

That is, the fixed biofilm of the carrier increases the thickness of the membrane while treating the keratin organic matter contained in the introduced wastewater.

Due to the increased thickness of the membrane, the specific gravity is lowered, so that the lighter carrier flows out as the fluidized bed diffuses above the initially set flow height, making it difficult to operate a normal bioreactor. In order to make up for this drawback, the carrier should be taken out using a separate carrier extractor, and then the carrier should be returned without damaging the biofilm grown excessively.

For example, US Pat. No. 4,681,685, Japanese Patent Laid-Open No. 62-79896, 63-229192, 63-264196, Japanese Patent Laid-Open No. 1-231995,1-293189, etc., overgrown biofilm in a wastewater treatment apparatus using a bioreactor. It is known to remove the overgrown biofilm using a vibrating screen, hydrocyclone, pyrolysis, separation by simple pump, etc. In addition, the overgrown biofilm removal efficiency is not satisfactory, the process is complicated, and carrier damage occurs.

Accordingly, an object of the present invention is to provide an anaerobic wastewater treatment apparatus using a bioreactor using a carrier that does not degrade the treatment effect even for a long time operation.

That is, in the present invention, by installing a carrier trap outside the bioreactor and equipped with an ultrasonic oscillator operated by a level sensor, the overgrown biofilm is removed from the carrier and recycled to the reactor, but is recycled to the bioreactor without damaging the carrier. By doing so, the treatment effect is not lowered even during long time operation.

The present invention is described in more detail as follows.

1 is a schematic process diagram of the wastewater treatment apparatus of the present invention,

2 is a schematic process diagram showing another example of the apparatus of the present invention.

The anaerobic wastewater treatment apparatus of the present invention comprises a fluidized bed reactor (3), a carrier trap (5), a settling tank (9), and a carrier recycling means.

One end of the fluidized bed reactor (3) is connected to the inlet water pump (2) for introducing the waste water (1), the upper end of the carrier trap (5) and the settling tank (9) is connected to the pipe, the carrier trap (5) An ultrasonic oscillator 6 for removing excess grown biofilm and a carrier level sensor 7 for sensing the amount of carrier to operate the ultrasonic oscillator 6 are installed in the apparatus. (12-17) and the recirculation pump (8).

Also, as shown in FIG. 2, the ultrasonic oscillator 6 may be installed in the circulation pipe 18 instead of the carrier trap 5, and the carrier from which the overgrown biofilm is removed may be installed in the fluidized bed reactor 3 In order to facilitate the recycling to the recycle to the recycle may be additionally installed at the top or bottom of the carrier trap (5) is commonly used in the art.

In the present invention, in the wastewater treatment apparatus using a fluidized bed bioreactor using a carrier, an ultrasonic oscillator installed with a carrier trap (5) outside the fluidized bed bioreactor (3) and operated by a level sensor (7) (6) was invented an apparatus for separating and washing the carrier in which the biofilm was overgrown and recycled to the fluidized bed bioreactor (3).

Referring to the operation of the anaerobic wastewater treatment apparatus of the present invention.

When the wastewater treatment device is activated, the wastewater 1 introduced by the pump 2 with the valves 15, 16 and 17 closed is introduced into the fluidized bed bioreactor 3 and the carrier ( 4) After being purified by the microbial cells, a part of the waste sludge 10 and the treated water 11 are passed through the settling tank 9, and the other part is used for the flow of the carrier 4 in the reactor 3. It is recycled to the reactor 3 by the recycle pump 8.

After a certain period of time after the fluidized bed bioreactor 3 is operated, the biofilm thickness of the carrier 4 present in the reactor 4 increases, so that the specific gravity of the carrier 4 decreases and the specific gravity of the carrier decreases. Carrier 4 having an overgrown biofilm is collected in the carrier trap 5 by flowing out along with the circulation water through 12. The level sensor 7 detects the amount of the collected carrier and according to the detection signal of the designated height, the biofilm is separated by the ultrasonic oscillator 6 over the optimum processing time.

When the separation ends after a given time, the valves (12) and (13) are closed, the valves (15), (16) and (17) are opened in turn, and the valve (14) is closed, and a part of the treated water is recycled pump ( The carrier 4 is discharged from the carrier trap 5 at a sufficient hydraulic pressure, and is recycled to the fluidized bed reactor 3.

On the other hand, as shown in FIG. 2, when the ultrasonic oscillator 6 is installed in the circulation pipe 18, the carrier in which the biofilm is overgrown while the valves 15, 16 and 17 are operated in the closed state. (4) flows out through the valve 12, the outflow carrier 4 is removed by the ultrasonic oscillator 6 in the circulation pipe 18, the overgrown separator is removed, the overgrown separator removed carrier It is moved through the circulation pipe 18 to be stacked on the carrier trap (5). When a certain amount of carrier 4 is accumulated in carrier trap 5, carrier level sensor 7 detects and opens valves 15, 16, and 17 to open valves 12, 13, and 14. By closing, the recycle water and the carrier 4 are recycled to the reactor 3 by hydraulic pressure by the operation of the recycle pump 8.

The wastewater treatment apparatus of the present invention as described above does not need a separate carrier withdrawal device, so that the overgrown biofilm can be easily removed, and the carrier 4 is transferred to the reactor 3 by the carrier trap 5 and the recycle water. Recycling has the effect of effectively treating wastewater continuously without damaging the relatively mild carrier.

Claims (2)

A fluidized bed bioreactor (3) for treating wastewater by a carrier (4) carrying microorganisms, and a carrier (4) having overgrown biofilms are collected and washed to be connected to the reactor (3) and ultrasonically inside. Carrier trap 5 having oscillator 6 and carrier level sensor 7 formed therein, and sedimentation tank 9 and valve 15 connected to reactor 3 by sedimentation and removal of waste sludge 10 from the treated wastewater. , (16), (17) and anaerobic wastewater treatment apparatus comprising a carrier recycling means consisting of a recirculation pump (8). The anaerobic wastewater treatment apparatus according to claim 1, wherein an ultrasonic oscillator (6) is installed in the circulation pipe (15).