JPS5962398A - Fermentation tank - Google Patents

Abstract

PURPOSE:To economize the heat energy to be changed from the outside by disposing an acid fermentation tank so as to be surrounded with the other gasifying tank and settling tank, and releasing the total quantity of heat generated by the action of the microorganisms in the acid fermentation tank to the surrounding tanks. CONSTITUTION:An open tank 1 is partitioned to an acid fermentation tank 3 which performs acid fermentation, a gasifying tank 5 which performs a gasifying treatment, and a settling tank 2 which subjects the treated liquid after the gasifying treatment to a solid-liquid sepn. The tank 3 is so disposed as to be surrounded with the other tanks. The tanks are so constructed that the separated liquid after it is subjected to the solid-liquid sepn. in the tank 2 passes through the inside of a release pipe 6 laid in the tank 3 and is removed to the outside through a release channel 7 on the outside. The removal of an air diffusion pipe 18 for agitation disposed in the tank 5 to the outside is made possible and a wave sealing part is provided in the inserting or removing part of the pipe 18.

Description

[Detailed description of the invention] This invention relates to a fermenter that can be manufactured at low cost using

Are sewage and human waste treatment facilities using anaerobic digestion to reduce the volume and turn organic matter or its waste into scum? Are they constructed from reinforced concrete or steel from the beginning? The disadvantage is that the manufacturing cost of the device is large.

Ichiriki Conventionally, organic waste is treated using a pond or natural reservoir, or waste is not collected.

The present invention proposes a fermenter that can solve 13 disadvantages when organic waste is methane-fermented to produce methane gas at a low cost.

Existing natural or artificial open tanks should be used as at least an acid fermentation tank for feeding raw materials and performing acid fermentation, a cassification tank for cassification treatment, and a settling tank for solid-liquid separation of the treated liquid after cassification treatment. Along with partitioning.

A roof is installed in the acid fermentation tank, and a pipe is connected to the ai! Pass it through the rF liquid and discharge it to the outside.

A fermentation tank is provided, characterized in that a stirring aeration pipe disposed in a cassification tank can be taken out to the outside, and a liquid sealing part is provided at the insertion or removal part of the aeration pipe. .

B. The invention provides a fermentation device at a low cost by utilizing a natural reservoir or an open pit storage tank;
Furthermore, by arranging the acid fermenter so that it is surrounded by other tanks, the total amount of heat generated by microbial activity in the acid fermenter is transferred to the surrounding tanks, minimizing the thermal energy input from the outside. I can hold it down.

In addition, a tube for discharging the separated liquid after solid-liquid separation in the sedimentation tank is connected to the flirt IIJI in the acid fermentation l1lJ.
Since the liquid is passed through the liquid and discharged to the outside, heat exchange between the Ryo A'1 liquid and the separated liquid is performed in the same way, and the raw material (
It is possible to perform addition 1111,1 of k.

In addition, although it is placed inside the fermentation tank (by making it possible to extend the accompanying air diffuser to the outside, it is easy to repair the aeration sacrifice externally, and the part where the air diffuser passes through the fermenter is sealed with liquid. The provision of this section has the advantage of completely preventing external air from entering the inside of the fermenter.

Next, one embodiment of the device of the present invention will be described based on the drawings.

In a methane fermentation system in which the raw material or its waste is used as raw material, the acid fermentation step (this step may be omitted depending on the raw material).
, the scuming process is an essential condition.

The scum production process requires an acid-free environment and temperature conditions in which the activity of methane bacteria is active, and the work does not occur due to the lack of oxygen and harmful scum in the fermentation tank.

In addition, it is said that +/m degree ('l is generally the optimum temperature for the liquid in the casing tank at around 300°C, which is the appropriate temperature for mesophilic bacteria, or around 500°C, which is the temperature for high-temperature bacteria. C;1
If the temperature is 1 Mi degree or lower, add '/! Requires M-manufacturer's key.

In Figure 1-1, a partition is provided in an existing open tank 1, either natural or artificial, to allow acid fermentation ('i! Tank 2.
In a methane fermentation device consisting of a thickening tank 4, etc., which further reduces the water content of sludge separated into solid and liquid in a sedimentation tank 2, Me:ll! is a necessary condition for methane fermentation. In order to secure 1M 1-row Ino 1 with minimal input of energy from the outside, the acid fermentation tank 3 where the raw materials are stored first is the settling tank 2. Concentration: Install in a position surrounded by 4°3 or more. These +i!・The corner is placed in the same tank holder (torter 1,) 17 that seals the opening part of the methane fermenter 26 without releasing the total amount of heat generated by microbial activity in the acid fermentation tank 3 to the outside. It also absorbs heat from other tank walls and raises the FA Mt crystalline temperature.

In addition, the two-layer liquid is separated into solid and liquid in sedimentation tank 2.

The outside rKl<
It has a structure in which it is taken out to the outside via a waterway 7, and heat exchange between the raw material (liquid) and the supernatant liquid is carried out here as well, and the raw material O 1 is heated.

In the acid fermentation process, Jω anaerobic bacteria work to reduce the high-molecular organic matter to low molecular weight, or in the scum formation process, obligate anaerobic bacteria work, so it is necessary to create an oxygen-free condition.

Therefore, raw material (:1) is input from the raw material input [110] installed at a distance from the acid fermentation tank, and flows into the acid fermentation tank 3 through a transfer means 10' such as piping.The input port 10 and the acid fermentation The distance to the acid fermentation tank 3 is such that it can become an anoxic state when entering the acid fermentation tank 3 and transfer time is required, or in the event that an anoxic state does not occur, the distance between the acid fermentation tank 3 and the pump 1 is determined.
It is adjusted by mixing the liquid in the acid fermenter that has been drawn out.

Even when the moisture content of the raw material is low and the transfer is difficult, the liquid in the acid fermenter is similarly supplied to facilitate the transfer.

In addition, it is necessary to cover the acid fermenter 3 in order to create an oxygen-free condition.

Precipitation J・jl, + 2 contains waste solids that are expected to be mixed into the supernatant liquid after the solid-liquid separation treatment. A shield 8 is provided to prevent IJ from getting mixed in with the liquid.The shield 8 has a part submerged below the liquid surface and a part exposed above the liquid surface.

1. Parallel to the overflow wall 9' belonging to the overflow channel 9. B111 h:h: to y;1. : Requires proper placement.

After the supernatant liquid in the sedimentation tank 2 passes through the lower part of the shield 8,
It passes over the overflow wall 9' and enters the discharge pipe 6 via the overflow waterway 9.

Is the shape of the sink l: i, jQ2 suitable for circular, rectangular, or other shapes?The volume is at least 1 hour's worth of water flowing into the sink etc. Area (1M)
The inflow water phase should be 50 rd/below the mouth,
The liquid level of the overflow waterway 9 or the discharge pipe 6 must be at the same level as the acid fermenter liquid level.

Settlement] C12 l:ill,・The sludge that accumulates on the bottom is
The sludge is drawn out via the sludge drawing pipe 11 and the sludge drawing pump 12 .

Concentrator tank if necessary4. Or a scum tank5. Or transfer it outside the system〇Concentration i: +, l174, sludge water is gravity settled and t
It has the function of reducing the amount of mud by compacting it.

The shape may be circular, rectangular, etc.

Its surface area is determined by the amount of sludge flowing into the a reduction tank 4 or the unit area (
1 butt), per day, bone dry solids f? The area must be 9 or less at t1.00, the volume should be at least 3 hours' worth of inflow liquid, and the liquid depth should be about 5M. A: The liquid in the contraction tank 4 is 1; 6, and the acid fermentation tank 3. It is necessary to raise the liquid level higher than the liquid level in the casing tank 5, so the structure is such that the liquid can flow into the casing tank 5. The sludge compacted at the bottom of the water tank is removed from the sludge extraction pipe 13.
The sludge pump 14 transfers the sludge to the sludge tank 5 for maintaining the bacterial population outside the sludge or sludge.

Here, subtract l'5] Tomo Pump 12. The t7 full pump 14 may be installed in each tank.

In a methane fermentation system, as mentioned above, the function of methane bacteria is important, and in order to increase its effectiveness, it is necessary to improve the contact between methane bacteria and organic matter in the fermenter. The trowel 2 blows the generated methane sludge into the scum 5 and stirs the scum. For the scum agitation, the scum is supplied to the stirring blower 16 through the scum blowing pipe 18 that passes through the first part system's closed 1-m 17, is pressurized by the stirring blower 6, and is turned into scum via the 111 mountain pipe 19. 4:j3i It is blown away within 5. Discharge pipe 19
In order to have a structure that can be taken out and inserted outside depending on the situation, it is necessary to use +71 quality that can be wound with a winder 20 installed outside. It is a kind.

In the part of the extraction pipe 19 that is submerged in the liquid surface of the scuming tank, pores must be opened to form fine bubbles during stirring. You may also add ``I・】 instead of ``Shikiki-e''.

On the anti-blower side of the outlet pipe 19, there is an I in the Kasu resident monk 5.
ll: lj 'i'i can be inserted'; At the same time, the wire, lobes, or chain cheeks 22 are fixed, and at the same time, as shown in Figure 4, there is one small hole in the discharge shield (waste blowing hole)
On the opposite side, wires and chains 23 are fixed, which are placed stationary at the bottom of the fermentation tank and are superimposed over each other.

The ends of the wires, ropes, and checks 22 are fixed to a winder 20' installed on the opposite side of the winder 20 and the scuming tank 5. Also, both wires and chains 22.23
is fixed to the winder 20, 20', and by operating the winder 9, the discharge pipe can be moved, inserted, and taken out.

The part that penetrates the outside of the fermentation mold 19 or the fermentation mold 26 is used to prevent scum from leaking to the outside of the fermentation tank 26 and to prevent outside air from entering the fermentation device 26. A sealing device 24 is provided. In the liquid seal part, an idler 25 is provided at a portion where the structure and the discharge pipe 19 come into contact, so that the discharge pipe 19 can move smoothly without bottoming out.

This liquid sealing part 24 is also provided in the part where the winder 20' on the opposite side of the blower winds up the winder, and the part where the winder 22 is responsible for fermentation. (It is 1, and 25 pieces of eyelids are similarly installed in the closing part.)

Is the inside of the methane fermentation tank in an oxygen-deficient state and fire is strictly prohibited? In addition, a flexible wire is used for the discharge pipe 19, and wires, lobes, chains, etc. are fixed to one end of the discharge pipe 19, and this is wound up with a winder. Therefore, the discharge pipe 19 can be taken in and out of the fermenter 26 very smoothly.

Further, a liquid sealing device 24 is provided in the E4 light portion of the fermenter 26 through which the discharge pipe 19 penetrates, completely blocking the intrusion of outside air, and an idler 25 is provided in the portion that comes into contact with the discharge pipe 19. Note.

The insertion and removal of the 111 exit pipe 19 is not obstructed at all.

Note that the present invention is applicable to, for example, liquid and solid waste treatment, energy from organic matter or its waste (methane fermentation tank)
Applicable to collection equipment, etc.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the apparatus of the present invention. Of these, Figure 1 is the overall plan view, and Figure 2 is the ■- in Figure 1.
FIG. 3 is a partially longitudinal elevational view taken along line 11, FIG. 3 is a longitudinal elevational view, and FIG. 4 is a perspective view showing the aeration discharge pipe 19. 1...Open tank, 2...Settling tank, 3...Acid fermentation tank. 4... Concentration tank, 5... Casing tank, 6..." Two liquid discharge pipe. 7...Discharge channel, 10...Hara 14 input port,"6...
Stirring blower, 17...Top sealed dome, 18...
Waste suction pipe, 19...Discharge pipe for aeration, 20.20'
... Winding machine, 22... Wire, rope, chains. 24... Liquid sealing device, 25... Idler, 26... Methane fermentation tank. Figure 1 2V

Claims (1)

[Claims] At least an existing open tank of nature or man. 1! ij ii] and perform acid fermentation.
It is divided into a scum tank for performing scum processing, and a sedimentation tank for solid-liquid separation of the treated liquid after scum processing. A pipe line for discharging the separated liquid after solid-liquid separation in the precipitation tank passes through the raw material liquid in the acid fermentation tank and extracts it to the outside. Fermentation (11 (1) characterized in that the aeration diffuser tube disposed inside the aeration tube can be taken out to the outside, and a liquid sealing portion is provided at the insertion or removal portion of the aeration tube.
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