KR101532735B1 - Up flow anaerobic waste water treatment with microorganism sludge thickener - Google Patents

Abstract

The present invention relates to an upflow anaerobic digestion wastewater treatment apparatus having a microorganism concentration tank and, more particularly, to an anaerobic digestion wastewater treatment apparatus having an anaerobic reaction tank, a gas-sludge separation apparatus, a gas-sludge auxiliary separation apparatus, a gas drifting apparatus and an influent wastewater distribution apparatus The upflow anaerobic digestion wastewater treatment apparatus further comprises a microorganism concentration tank which is branched at an outlet of the anaerobic reaction tank to collect microorganisms contained in the effluent, concentrates the microorganisms, and reintroduces them into the anaerobic reaction tank.
According to the present invention, it is possible to prevent the loss of microorganisms by introducing the microorganisms concentrated in the effluent to the anaerobic tank through the inflow wastewater distribution device through the microorganism concentration tank, It is possible to increase the biogas collection rate by improving the digestion efficiency by reintroducing the microorganisms into the anaerobic reaction tank.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an upflow anaerobic digestion apparatus having a microbial concentration tank,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an upflow anaerobic digester with a microbial concentrator, more particularly, to a microbial concentrator by branching it with an outlet through which an effluent flows, and re-introducing the microbes contained in the effluent into an anaerobic reactor through a microbial concentrator The present invention relates to an upflow type anaerobic digestion apparatus having a microbial concentration tank for preventing loss of microorganisms and re-introducing microorganisms into an anaerobic reaction tank to increase the biogas production rate by improving digestion efficiency.

Among the most concentrated organic wastewater generated in industry, wastewater which is easily decomposed and low in solid concentration is food wastewater or beer wastewater, but its amount is extremely limited. On the other hand, organic wastewater with a high concentration of solids such as, for example, livestock, manure, sewage sludge, food wastes, agro-industrial wastes and the like, or a degradable organic material such as pulp, paper, Wastewater containing phosphorus or high concentration sulfate occupies most of the total wastewater.

Such high concentration organic wastewater generation is rapidly increasing along with the rapid development of industrialization. Considering current industrial policies and industrial wastewater discharge trends, a higher amount of organic wastewater will be discharged in a larger amount than at present, Biological treatments are expected to become more difficult.

An aerobic treatment system, an anaerobic treatment system, or an aerobic-anaerobic treatment system have been used to treat such high concentration organic wastewater to reduce environmental pollutants. However, energy consumption cost, sludge treatment cost, other installation cost, Given the economic aspect, the use of aerobic treatment systems is not appropriate. Therefore, an anaerobic digestion system capable of producing biogas that can be used as renewable energy from a large amount of organic matter contained in wastewater has been actively applied recently to treat high concentration organic wastewater.

As the anaerobic treatment system, a bottom-up anaerobic tank (Korean Patent Publication No. 10-2000-0001359) is used.

1, the bottom-up type anaerobic tank 1 includes a gas-sludge separator 2, a gas-sludge auxiliary separator 3, a gas drift device 4, an influent wastewater distributor 5, .

The influent wastewater is evenly distributed into the reaction tank 1 by the influent wastewater distributing device 5. When the wastewater flows into the lower part of the reaction tank 1 as described above, accumulated sludge is accumulated in the lower part depending on the upward flow velocity due to the inflow of wastewater and the buoyancy depending on the gas particles. As the sludge and gas are raised together, they pass through the gas drift device 4, enter the secondary separator 3, enter the inclined plate of the auxiliary separator 3 having an inclination angle of about 60 degrees And the gas is separated from the upper part of the sludge and the upper part of the swash plate. The gas thus separated and the gas in the sludge are re-precipitated in the gas-sludge separator 2 and accumulate in the high-concentration sludge layer 6 in the lower part of the reactor.

On the other hand, the sludge not separated in the auxiliary separator 3 is separated from the sludge layer 6 in the lower part while striking the left and right symmetrical inclined plates having an inclination angle of about 60 degrees while staying in the gas- Lt; / RTI >

However, since the bottom-up anaerobic tank contains the microorganisms in the raw water during the discharge process and the microorganisms are discharged along with the raw water, a large amount of microorganisms There is a problem of being lost.

Korean Patent Publication No. 10-2000-0001359

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a microorganism concentrating tank, which is branched with an outlet through which effluent water flows, and prevents the loss of microorganisms by recycling microorganisms contained in the effluent to the anaerobic tank through a microorganism concentrating tank, And an object of the present invention is to provide an upflow anaerobic digestion apparatus having a microbial concentrator capable of increasing the biogas production rate by improving the digestion efficiency by re-introducing the microorganisms into the anaerobic reaction tank.

According to an aspect of the present invention,

An upflow anaerobic digester comprising an anaerobic reactor, a gas-sludge separator, a gas-sludge auxiliary separator, a gas drifting device and an influent wastewater distributor, wherein the upstream anaerobic digester is branched at the outlet of the anaerobic reactor, And a microorganism concentration tank for collecting microbes, concentrating them, and re-introducing them into the anaerobic reaction tank.

The microorganism concentration tank includes a microorganism inflow pipe vertically installed with an outlet of the anaerobic tank so that the microorganism can be dropped and introduced into the anaerobic tank; A main body having upper and lower ends formed in a closed cylindrical shape and installed on a side surface of the anaerobic reaction tank, the microbial inflow pipe extending vertically through the upper center portion; An upper water discharge pipe installed on a side surface of the main body and discharging the upper water to the outside; And a microbial discharge pipe connecting the bottom surface of the main body and the inflow wastewater distribution device inside the anaerobic reaction tank to return the microorganisms inside the main body to the anaerobic reaction tank through the inflow wastewater distribution device.

Here, the microbial inflow pipe, the supernatant discharge pipe, and the microbial discharge pipe are each provided with a solenoid valve.

In this case, a water level sensor is provided in the main body, and when the internal water level exceeds a reference water level, the solenoid valve of the supernatant discharge pipe is opened to discharge the supernatant, and the solenoid valve of the microbial discharge pipe is opened, And discharged into the anaerobic tank through the inflow wastewater distribution apparatus.

According to the above-described upflow type anaerobic digester having the microbial concentrator of the present invention, the microbial concentrator is installed by branching with an outlet through which the effluent flows, and the microbes contained in the effluent are re-introduced into the anaerobic reactor through the microbial concentrator It is possible to prevent loss of microorganisms and to increase the biogas collection rate by improving the digestion efficiency by reintroducing the microorganisms into the anaerobic reaction tank.

1 is a view showing the structure of a conventional bottom-up anaerobic reactor.
FIG. 2 is a side view showing the structure of an upflow anaerobic digester apparatus having a microbial concentrator according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the structure of an upflow anaerobic digester having a microbial concentration tank according to the present invention will be described in detail with reference to the accompanying drawings.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and these may be changed according to the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification.

2 is a side view showing the structure of an upflow type anaerobic digestion apparatus having a microbial concentration tank according to the present invention.

2, an upflow anaerobic digester 100 having a microbial concentrator according to the present invention includes an anaerobic reactor 1, a gas-sludge separator 2, a gas-sludge separator 3 ), A gas drifting device (4), an influent wastewater distribution device (5), and a microorganism concentration tank (110).

First, the anaerobic tank 1, the gas-sludge separator 2, the gas-sludge auxiliary separator 3, the gas drift device 4, and the influent wastewater distributor 5 have similar structures And the description thereof will be omitted.

The microbial concentration tank 110 is composed of a microbial inflow pipe 111, a main body 113, a supernatant discharge pipe 115, and a microbial discharge pipe 117.

The microbial inflow pipe 111 is installed perpendicularly to the outlet 1a of the anaerobic reaction tank 1 so as to branch off from the outlet of the anaerobic reaction tank 1 and collect microorganisms contained in the effluent water. At this time, the microorganism inflow pipe 111 is provided with a first solenoid valve V1.

The main body 113 is formed on the side of the anaerobic tank 1 so as to be able to concentrate the microorganisms in a closed cylindrical shape. The microbial inflow pipe 111 penetrates the upper center portion and is vertically installed therein. In this case, the water level sensor 120 is provided in the main body 113. When the internal water level exceeds the reference water level, the second electromagnetic valve V2 of the upper water discharge pipe 115, which will be described later, And the third solenoid valve V3 of the microbial discharge pipe 117 to be described below is opened to discharge the microorganisms to the inflow wastewater distribution device 5 to supply the inflow wastewater distribution device 5 To the anaerobic tank (1).

The supersonic water discharge pipe 115 is provided on the side surface of the main body 113 and discharges the supernatant to the outside. At this time, the second solenoid valve V2 is provided in the supersonic water discharge pipe 115.

The microbial discharge piping 117 connects the bottom surface of the main body 113 and the anaerobic tank 1 to discharge the microorganisms under the main body 113 to the inflow wastewater distribution apparatus 5, Re-enter the reaction tank (1). At this time, the third solenoid valve (V3) is provided in the microbial discharge pipe (117).

Hereinafter, the operation of the upflow anaerobic digester having the microbial concentration tank according to the present invention will be described in detail.

The wastewater flowing into the anaerobic reaction tank 1 through the influent wastewater distribution device 5 is uniformly distributed into the anaerobic reaction tank 1. When the wastewater flows into the lower part of the anaerobic tank 1, the accumulated sludge in the lower part of the anaerobic tank 1 is increased depending on the upward flow velocity due to the inflow of the wastewater and the buoyancy due to the gas particles. While the sludge and the gas are rising together, they pass through the gas drift device 4 firstly, flow into the secondary separator 3, collide with the swash plate of the auxiliary separator 2 having an inclination angle, The sludge in the lower part is separated from the gas in the upper part. The separated gas and the gas in the sludge are re-precipitated in the gas-sludge separator 2 and accumulated in the high-concentration sludge layer 6 in the lower part of the reactor.

On the other hand, the sludge not separated from the auxiliary separator 2 is separated from the sludge by a symmetrical sloping plate having an inclination angle while staying in the gas-sludge separator 2 for a predetermined period of time and re-precipitated into the lower sludge layer 6 .

As the process is repeated, the organic wastewater flowing into the lower part of the reaction tank is converted into methane gas, carbon dioxide and the like by about 90% or more of the organic matter, and only the concentrated anaerobic sludge accumulates in the lower part of the reactor.

The wastewater is discharged through the outlet 1a of the anaerobic tank 1. At this time, the microorganisms in the anaerobic tank 1 are also discharged.

Then, the wastewater discharged through the outlet 1a of the anaerobic tank 1 flows into the microbial inflow pipe 111, and the microbes are continuously stored in the main body 113 and concentrated.

In this state, when the water level in the main body 113 exceeds the reference water level, the water level sensor 120 opens the second solenoid valve V2 to discharge the water level of the main body 111 through the water level discharge pipe 115 The third solenoid valve V3 of the microbial discharge pipe 117 is opened and the concentrated microorganisms are discharged to the influent wastewater distribution device 5 and discharged to the anaerobic reaction tank 1 through the inflow wastewater distribution device 5 .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood, however, that the invention is not to be limited to the specific forms thereof, which are to be considered as being limited to the specific embodiments, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims. .

1: bottom-up anaerobic tank 2: gas-sludge separator
3: gas-sludge auxiliary separator 4: gas drier
5: influent wastewater distribution device 110: microorganism concentration tank
111: microorganism inflow pipe 113: main body
115: Supersonic discharge piping 117: Microbial discharge piping
120: Level sensor V1, V2, V3: First, second and third solenoid valves

Claims (4)

An upflow anaerobic digester comprising an anaerobic reactor, a gas-sludge separator, a gas-sludge auxiliary separator, a gas drier and an influent wastewater distributor,
Further comprising a microbial concentrator for branching at an outlet of the anaerobic reactor to collect microbes contained in the effluent and concentrate the microbes into the anaerobic reactor and recycle the microbes into the anaerobic reactor. The method according to claim 1,
The microorganism concentrating tank comprises:
A microbial inflow pipe vertically installed to an outlet of the anaerobic reaction tank so that microbes can be dropped and introduced;
A main body having upper and lower ends formed in a closed cylindrical shape and installed on a side surface of the anaerobic reaction tank, the microbial inflow pipe extending vertically through the upper center portion;
An upper water discharge pipe installed on a side surface of the main body and discharging the upper water to the outside; And
And a microbial discharge pipe for connecting the bottom of the main body and the inflow wastewater distribution device in the anaerobic reaction tank to discharge the microorganisms inside the main body to the inflow wastewater distribution device and returning the microbes to the anaerobic reaction tank through the inflow wastewater distribution device Wherein the microbial concentrator comprises a microbial concentrator and an upflow anaerobic digester. 3. The method of claim 2,
In the microbial inflow pipe, the supernatant discharge pipe, and the microbial discharge pipe,
Wherein the microbial concentrator is provided with a solenoid valve. The method of claim 3,
Inside the body,
A water level sensor is provided to open the solenoid valve of the supersonic water discharge pipe to discharge the supernatant and open the solenoid valve of the microbiological discharge pipe to discharge the microorganisms to the inflow wastewater distribution device, Wherein the microbial concentrate is discharged through the inflow wastewater distribution device to the anaerobic reactor.

Images