JP2001207391A - Equipment for treating wastepaper sludge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an equipment capable of continuously treating wastepaper sludge by a simple operation for the purpose of decreasing the weight and volume of many kinds of waste paper such as slime effluent, recovered old paper and used paper and further changing waste paper into utilizable resources. SOLUTION: This equipment for treating wastepaper sludge has a first fermentor for enzymatically and anaerobically treating the wastepaper sludge to produce organic acid mixed ingredients, a second fermentor for acting photosynthetic bacteria on the organic acid mixed ingredients and an auxiliary member for aiding the cultivation of the photosynthetic bacteria in the second fermentor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for treating used paper sludge. More specifically, the present invention
The present invention relates to an apparatus for treating waste paper sludge for the purpose of reducing paper waste such as sludge waste liquid, recovered waste paper, used paper, and the like, and further recycling used paper.

[0002]

2. Description of the Related Art From the viewpoint of economic effects such as resource saving and energy saving, the effective use of waste paper as a raw material for papermaking has become increasingly important year by year.

[0003] The process of recycling used paper into a raw material for papermaking (used paper pulp) includes a process of selecting and sorting used paper, a defibration process, a dust removal process, and a deinking process.

(1) Selection and sorting process: This is an operation at a waste paper collector and a receiving factory. In the selection step, a clear grade is set for the used paper, and the paper quality is distinguished (selection of used paper) based on the fiber shape and the impurity content. At the same time, in the sorting process, non-fibrous contaminants such as earth and sand, glass, and fasteners are removed (sorted) by separation sieving or centrifugal washing, and fine crushed materials are removed by using a small aperture or a pressure with pores. Perform by sieving.

(2) Disaggregation and dust removal process: In the disaggregation process,
Using a pulper, digester, kneader, beater, etc., the used paper is defibrated, and in the dust removal process, foreign materials such as plastics such as polyethylene, styrofoam, coated films such as adhesive tape, and other low-density impurities are screened. Using a sifter and a cleaner, the sifted material is collected and separated at a spill section generated in a special sieve and a back-flow washer, and removed.

(3) Deinking step: The deinking step is
Penetration of chemicals (for example, alkalis and detergents (surfactants)) into waste paper, ink (furthermore, adhesives, dyes,
Contaminants of chemical products such as special paints and internal additives.
Flotation that breaks the bond between the fiber and ink, breaks down the ink etc. and disperses it in water, separates the dispersed ink etc. from the pulp (blows air from the bottom, attaches the ink etc. to air bubbles and floats and separates) Method or a washing method of washing with a large amount of water).

[0007] Products made from the waste paper pulp (recycled paper) thus obtained, such as lining paperboard, newsprint, box paper, printing paper, tissue paper, etc., have considerably high performance and quality. However, in terms of price, it has a high cost structure, such as manual classification work required by the collectors required before pulping, and imported wood (chips) is now available at extremely low prices. At present, it is impossible to compete with consumers if consumption is not encouraged by appealing for environmental protection, etc. Rather, the amount of recycled paper used is decreasing.

Further, in the above-mentioned method of recycling waste paper as a pulp resource, the obtained various recycled paper products suffer from contamination and drying of contaminants, aging of substances, and changes in the structure of fibers caused by the recycling process. Due to its low strength, low specific volume, and in some cases, a large average specific surface area, the inner capillary of the fiber dehydrates and decay, becomes a flat structure, sometimes the fiber is split and cut, and the average length is short. It has different physical and mechanical properties from papermaking raw materials and paper fibers.
Therefore, the production of paper and paperboard using recycled paper requires special equipment and processing. Also, once recycled paper cannot be recycled and used many times. Further, there is a problem that the deinking process is required for the regeneration, and paper containing calcium carbonate or gypsum, such as kraft paper, is not suitable for the regeneration.

Nevertheless, in order to landfill such waste paper, Japan has a narrow land area and few such places, and in most cases, there is no alternative but to incinerate it together with other general waste. However, burning such waste paper may cause adverse effects on the human body due to the generation of dioxins and increase in CO ₂ , and cause environmental pollution such as global warming (deforestation due to increased use of paper). From the viewpoint of development, the development of a new effective utilization method of waste paper is an important social issue.

[0010] In addition, the Container and Packaging Recycling Law, which requires manufacturers (makers) to collect and recycle containers and packaging materials, may be enacted soon. The development of a recovery system is urgent. At the same time, the development of an effective use method after collection has been promoted. One of the methods is to replace the conventionally used cushioning material for storage containers, such as styrofoam and air cushions made of polyvinyl chloride, with corrugated cardboard. It has been switched to cushioning materials using bulky paper such as paperboard.
In addition, the use of paper, such as office paper, has been rapidly increasing due to advanced social life and the development of the information industry (such as the introduction of personal computers to workplaces), and the amount of paper consumption tends to increase rapidly every year. As a result, the amount of used paper that greatly exceeds the demand for recycled paper, which is not so large, is collected, and the collected used paper becomes stagnant.Accordingly, sludge waste liquid from the paper industry, collected used paper, used paper, etc. A lot of paper waste is piled up. However, they cannot be easily burned due to the dioxin problem, etc., and are causing social problems at many recovery sites and treatment plants. Against this background, the purchase price of recycled paper manufactures (manufacturers) has fallen sharply, and now there are some collection companies who have collected them for a fee. The system is not working properly. Nevertheless, Japan is the world's second largest paper consuming country after the United States, but relies on imports for wood (chips), which is the raw material for paper. In particular, in developing countries, the afforestation after logging has been delayed, and the deforestation of fertile soil has led to the progress of desertification. . Therefore, from the viewpoint of economic effects such as resource saving and energy saving and resource protection, a new effective use method of waste paper other than the use method as recycled paper is strongly desired at present.

[0011]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a novel apparatus which can easily treat paper sludge.

Another object of the present invention is to reduce waste paper such as sludge waste liquid, recovered waste paper, and used paper, and to reuse waste paper sludge in a single step and continuously for the purpose of recycling waste paper. It is intended to provide a device capable of processing.

Still another object of the present invention is to provide, in addition to the above advantages, waste paper sludge for the purpose of reducing a lot of paper waste such as sludge waste liquid, recovered waste paper, used paper, and the like, and further recycling waste paper. An object of the present invention is to provide a device that can perform processing efficiently with a simple operation.

[0014]

Means for Solving the Problems The present inventor has conducted intensive studies in view of the above circumstances, and as a result, as for the waste paper of the organic waste which has recently attracted attention, the main component thereof is cellulose, which is similar to starch. Focusing on the fact that it is made up of sugar (glucose) and can be decomposed into constituent units of sugar by the enzyme cellulase, waste paper sludge is obtained from waste paper recycling collectors and paper companies or recycled paper recycling shippers and paper manufacturers. Waste paper from the company is chemically digested into waste paper sludge, loosened and degraded into sugar components by enzymes (cellulase), and further decomposed into sugar components by anaerobic treatment. It has been found that the use of assimilable materials can reduce and deodorize paper waste. In addition to the above findings, in addition to the above-mentioned anaerobic treatment process and photosynthetic bacteria using photosynthetic bacteria, The invented device which can perform continuously. The present invention has been completed based on these findings.

[0015] That is, the above objects are as follows:
(Q) is achieved.

(A) A first fermenter for producing an organic acid mixed component by subjecting waste paper sludge to an enzyme / anaerobic treatment, and a second fermenter for allowing photosynthetic bacteria to act on the organic acid mixed component. And an auxiliary member for assisting the culture of the second fermenter with photosynthetic bacteria.

(A) The apparatus according to (A), wherein the auxiliary member is constituted by a tube-shaped material externally attached to the second fermenter.

(C) The apparatus according to (A) or (A), wherein the auxiliary member is provided with a reflective tape body between the tubular material and the second fermenter.

(D) The method according to any of (a) to (c) above, further comprising a gas collecting tank for storing gas generated in the first and / or second fermenters.

(E) The apparatus according to (d), wherein the gas collection tank is a methane gas collection tank for collecting methane gas generated in the first fermentation tank.

(F) The apparatus according to (d), wherein the gas collection tank is a hydrogen gas collection tank for collecting hydrogen gas generated in the second fermentation tank.

(G) The method according to any one of (a) to (f) above, wherein the second fermenter is provided with an internal luminous body.

(H) The second fermenter has a shelf member provided therein, and a liquid-permeable member containing photosynthetic bacteria is placed on the shelf member. The method according to any of the above.

(G) The method according to any one of (a) to (h), wherein the second fermenter further comprises a cell concentration device for concentrating cells.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION A waste paper sludge treatment apparatus according to the present invention comprises a first fermenter for producing an organic acid mixed component by subjecting waste paper sludge to an enzyme / anaerobic treatment, and a photosynthesis method for the organic acid mixed component. A second fermenter for allowing bacteria to act, and an auxiliary member for assisting the culture of the second fermenter with photosynthetic bacteria are provided.

Hereinafter, the present invention will be described in detail.

One embodiment of the used paper sludge processing apparatus of the present invention will be described below with reference to FIG.

FIG. 1 is a schematic sectional view of a waste paper sludge processing apparatus according to the present embodiment.

In FIG. 1, a waste paper sludge processing apparatus includes a first fermentation tank 10 for enzymatically and anaerobic-treating the used waste paper sludge S, and an organic acid mixed and processed by the first fermentation tank 10. A second fermenter 20 for allowing photosynthetic bacteria to act on components, a methane gas collection tank 30 for collecting methane gas generated from the first fermenter, and a hydrogen gas collection for collecting hydrogen gas generated from the second fermenter Tank 4
0, and these tanks are erected on the base 1.

The first fermenter 10 has a bottom plate 11 fixed to the base 1, and an outer cylinder 12 stands upright on the bottom plate 11. The outer cylinder 12 has a hermetic structure because it is used for subjecting waste paper sludge to an enzyme / anaerobic treatment. The shape and material of the first fermenter 10 used here are not particularly limited, and those similar to the fermenters used for known enzyme treatment and anaerobic bacteria can be used. As the material of the tank, for example, SUS3
04, stainless steel such as SUS316 and SUS316L, vinyl chloride resin, polycarbonate resin, acrylic resin, methacrylic resin, epoxy resin, polypropylene resin, PET (polyethylene terephthalate) resin,
Examples include polyethylene resin and glass. When the material used is a material that elutes into the culture solution, the inside of the fermenter may be coated with an inert material.

A lid 13 which can be opened and closed is provided on the top of the outer cylinder 12.
Is mounted inside the outer cylinder 12, and an inner cylinder 14 is provided coaxially with the outer cylinder 12. In addition, the lid 13 is provided with an inlet for charging enzymes and anaerobic bacteria, a pH meter and a hole for charging a pH adjuster, and the like, and is denoted by O in FIG.

A heater 17 for circulating a constant temperature liquid is provided on the outer peripheral surface of the outer cylinder 12 so as to promote enzymatic treatment and culture (fermentation) inside. This heater 17
Is preferably long so as to be present from the bottom plate 11 to the liquid level of the sludge. Also, the heater 1 shown in FIG.
Instead of or in addition to 7, the periphery of the first fermenter is
The jacket may be covered with a temperature controlling member such as a material that generates heat. At this time, the temperature of the culture solution in the first fermenter varies depending on the type of anaerobic bacteria used and the ambient temperature, but is generally 30 to 60 ° C.

The inner cylinder 14 extends from the bottom plate 11 to a position immediately below the lid 13, and has a through hole 14 at a lower portion and an upper portion.
a and 14b are opened, and the used paper sludge S put into the first fermenter 10 can be circulated through the through holes 14a and 14b during the processing.

In the first fermenter 10, an organic acid mixed component and methane gas are generated by the enzymatic / anaerobic treatment of the waste paper sludge S, and the organic acid mixed component is attached to the bottom plate 11. The methane gas is led to the second fermenter 20 via the outlet pipe 15, and the methane gas is led to the methane gas collection tank 30 via the methane gas recovery pipe 16 attached to the lid 13.

The methane gas collecting tank 30 is provided on the base 1
The bottom plate 31 is fixed to the
The outer cylinder 32 has a hermetically sealed structure as a whole, in which water or electrolyzed water W is stored up to a predetermined height.

The top plate 32a of the outer cylinder 32 has an inner cylinder 33
Is fixed. This inner cylinder 33 has a top plate 33a at the top.
, And has a structure in which the lower end is opened, and hangs down to the vicinity of the bottom plate 31.

The inner cylinder 33 is provided with an open end 16a of the methane gas recovery pipe 16 and a methane gas take-out pipe 34. The upper end of the open end 16a has a protruding length from the bottom plate 31. Is short, the upper end of the methane gas extraction pipe 34 protrudes above the water surface, and the protruding length from the bottom plate 31 is long.

Therefore, the methane gas flowing out of the methane gas recovery pipe 16 is stored in the inner cylinder 33 and is drawn out from the methane gas extraction pipe 34 to the outside. As the methane gas collection tank 30, for example, a general-purpose gas collection container such as a collection tank or a collection bag is used, or the methane gas collection tank 30 is supplied with the methane gas via the methane gas extraction pipe 34 or without using the methane gas collection tank 30. The recovery pipe 16 may be directly connected to the reformer.

In the drawing, white arrows are used for gas bodies, and solid arrows are used for sludge and the like.

As shown in FIG. 1, the structure of the first fermenter 10 used in the present invention may be a double tube structure or a simply hollow (tube) structure. Also, if necessary, a stirrer may be provided inside.

According to the present invention, in the first fermenter 10, as will be described in more detail below, the fiber (cellulose component) of the waste paper sludge is converted to a low molecular weight and saccharified enzyme (cellulase), and then the saccharification is performed. An enzyme and anaerobic treatment that organically oxidizes the sugar component using an anaerobic bacterium is performed. This enzyme and anaerobic treatment removes organic matter such as acetic acid, propionic acid, and butyric acid from the fiber (cellulose component) of waste paper sludge. An acid and methane gas as a gas component are generated. Among these production components, organic acids are further assimilated by photosynthetic bacteria in the second fermenter, but methane gas is
It may be withdrawn from the first fermenter via a valve or the like provided on the upper part of the fermenter, or may be collected in a methane gas collecting tank 30 separately provided as shown in FIG. Among these, the latter method is preferably used because the generated methane gas can be used more effectively. Therefore, as shown in FIG. 1, the processing apparatus of the present invention uses the methane gas generated in the first fermentation tank as shown in FIG. It is preferable to further have a methane gas collecting tank for collecting. As described above, the material of the methane gas collecting tank 30 when the methane gas collecting tank 30 is provided is not particularly limited, and for example, SUS304, SUS31
6 and stainless steel such as SUS316L, vinyl chloride resin, polycarbonate resin, acrylic resin, methacrylic resin, epoxy resin, polypropylene resin, PET
(Polyethylene terephthalate) resin, polyethylene resin and glass. In the case where the methane gas collecting tank 30 is provided, it is preferable that a liquid in which methane is not dissolved, for example, water or the electrolyte W is charged in the methane gas collecting tank 30 in order to easily detect generation of gas. .

Next, the second fermenter 20 has a bottom plate 21 fixed to the base 1, and a cylindrical body 22 is erected integrally with the bottom plate 21. The second fermenter 20 used here is preferably made of a transparent material in consideration of daylighting, since organic acids are assimilated by photosynthetic bacteria. Such a material is not particularly limited and may be the same as a fermenter used for a known photosynthetic bacterium. Examples of the material for the second fermenter 20 include a vinyl chloride resin and an acrylic resin. Resin, methacrylic resin, epoxy resin, polypropylene resin, PET
(Polyethylene terephthalate) resin, polyethylene resin and glass. Further, when the material used is a material that elutes into the culture solution,
The inside of the fermenter may be coated with an inert material.

An internal luminous body 23 is provided inside the cylindrical body 22 coaxially with the cylindrical body 22, and an auxiliary member 24 for assisting the culture by the photosynthetic bacteria is externally provided outside.

The internal luminous body 23 is used when sufficient sunlight cannot be obtained, for example, when used indoors or at night, and promotes cultivation by the photosynthetic bacteria in the cylindrical body 22. This is particularly effective when culturing is performed indoors or in a place with low lighting efficiency such as a place with poor sunshine. In the embodiment in which the internal light-emitting body 23 is provided inside the fermenter, the installation place and the installation method of the internal light-emitting body 23 are not particularly limited as long as the light can be efficiently irradiated to the photosynthetic bacteria, but in consideration of uniform irradiation, As shown in FIG. 2, it is preferable that one or a plurality of transparent cylindrical bodies 23a are provided in the center of the fermentation tank 20 in the axial direction of the fermentation tank, and the internal luminous body 23 is inserted therein. At this time, it is preferable that the internal luminous body 23 is set at a height that slightly protrudes from the upper surface of the culture solution. In addition, as the internal light emitting body 23, a fluorescent lamp, a tungsten lamp, a xenon lamp, a halogen lamp, and a light introducing body thereof (for example,
An optical cable) and a luminous body are combined, and the light irradiation amount is usually 3000 to 30,000 lux, preferably 10,000 to 15,000 lux.

On the other hand, the auxiliary member 24 is used to further increase the effective lighting area required for photosynthesis by photosynthetic bacteria.
In order to allow sunlight or the like to easily enter the cylindrical body 22 when used outdoors, a light-transmissive material wound spirally in a relatively “sparse” state along the outer peripheral surface of the cylindrical body 22 is preferable. It is composed of a tubular material. On this occasion,
As a method of attaching the tubular material to the second fermenter 20, in addition to the above-described method of spirally winding the tubular material along the outer peripheral surface of the cylindrical body 22 in a relatively “sparse” state. A method of winding a tubular object along the outer peripheral surface of the cylindrical body 22 in a relatively “sparse” state,
And a method of combining headers along the vertical direction. In addition, in consideration of increasing the lighting area as much as possible in order to improve the assimilation capacity of photosynthetic bacteria, the installation position of the tube-shaped material is, as shown in FIG. It is preferable that the tube-shaped object is provided externally so that a light receiving area of at least two times, more preferably three to five times the light receiving area can be secured. In addition, as shown in FIG. 3, a reflector 23 b capable of reflecting light between the tubular material and the second fermenter 20 in order to improve the daylighting property as much as possible.
It is also effective to attach (for example, a tape-like or plate-like material such as aluminum foil or stainless steel). Further, as a material of the tube-shaped material, it is preferable that the tube-shaped material is formed of a light-transmissive material in consideration of an effective lighting area required for photosynthesis by photosynthetic bacteria, and such a material is, for example, a vinyl chloride resin. , Acrylic resin, methacrylic resin, epoxy resin, polypropylene resin, PET (polyethylene terephthalate) resin, polyethylene resin and glass. In this case, when the material component used is a material that elutes into the culture solution, a tube-shaped material whose inner wall is coated with an inert material may be used. In the above embodiment, the inner diameter of the tubular material varies depending on the flow rate of the culture solution containing the photosynthetic bacteria, the size of the fermenter 20 to be used, the type of the photosynthetic bacteria to be used, and the like, but is usually 1 to 10 cm, preferably 2 to 10 cm. ~
The thickness of the tube-shaped material varies depending on the size of the fermenter 20 to be used, the type of photosynthetic bacteria used, the desired strength, and the like. Is usually 0.1
To 5.0 mm, preferably 0.5 to 3.0 mm.

The cylindrical member 22 is also provided inside the tubular member.
A part of the organic acid-containing culture solution (i.e., the culture solution after the enzyme / anaerobic treatment in the first fermenter and the mixture solution with the photosynthetic bacteria culture solution previously charged) are distributed, The culture by the photosynthetic bacterium is promoted also in the tubular material, thereby assisting the culture in the cylindrical body 22.

Therefore, a pump P is provided at the lower part of the cylindrical body 22, and a part of the organic acid-containing culture solution in the cylindrical body 22 is drawn out by the pump P and introduced into the tube-like material. The culture solution containing the organic acid is moved upward while the culture is being performed in the tubular material, and is returned from the upper portion of the cylindrical body 22 to the inside. At this time, the flow rate of the organic acid-containing culture solution in the tubular material by the pump P is such that the photosynthetic bacteria are sufficiently activated in the tubular material by light, and the culture by the photosynthetic bacteria in the second fermenter 20 is performed. Is not particularly limited as long as it does not inhibit the reaction, but is usually 0.1 to 10 cm / min, preferably 0.5 to 10 cm / min.
2 cm / min. In the present embodiment, the pumping of the organic acid-containing culture solution in the tubular material is performed by the pump P, but the liquid sending means is not limited to the pump, and a known liquid sending means, For example, cylinder devices
It can be used in the same way.

In the present embodiment, a shelf member 25 is provided inside the cylindrical body 22, and a liquid-permeable member 26 containing photosynthetic bacteria is placed on the shelf member 25. When the organic acid-containing culture solution passes, the culture by the photosynthetic bacteria is further promoted. However, this shelf member 25 is not an essential member of the apparatus of the present invention. For the purpose of promoting culture and assimilation by photosynthetic bacteria.
5 may be installed in the fermenter 20 in multiple stages. In this case, by mounting the liquid-permeable member 26 containing the photosynthetic bacteria on the shelf member 25, in addition to or instead of the photosynthetic bacteria charged in the culture solution, 26 is preferable because the utilization of organic acids by photosynthetic bacteria is promoted or carried out. At this time, the material of the shelf member 25 is not particularly limited, and the first fermenter 10
The same known material as in the case of is used. Further, the size of the shelf member 25 varies depending on the size of the second fermenter 20 and the size of the liquid-permeable member 26, but the second fermenter 2
The height from the bottom of 0 is 1 of the height of the second fermenter 20 itself.
The height is preferably such that the liquid-permeable member 26 is placed at a height of ２〜 to ５, preferably １ ／ to ４. Also, the liquid-permeable member 26 is not particularly limited,
Known fixed cells can be applied in the same manner. For example, those in which a photosynthetic bacterium is embedded in agar, those in which a photosynthetic bacterium is embedded in another gel material, a porous ceramic or a polymer material, etc. In which bacterial cells are supported. Further, the size and shape of the liquid-permeable member 26 also vary depending on the size of the second fermenter 20 and the like, and are not particularly limited. Usually, one side or the diameter is 0.5 to 5.0 cm.
About 1.0 to 3.0 cm, and the height is 0.5 to 10.0 cm, preferably 1.0 to 3.0 cm.
A columnar shape and a cubic shape having a size of 3.0 cm are exemplified.

In the present invention, the second fermenter 20
It is preferable that a microbial cell concentrating device for concentrating microbial cells is provided therein. This microbial cell enrichment device utilizes the property that the photosynthetic bacterial cells easily aggregate in the positive or near the cathode depending on the type.For example, when the photosynthetic bacterial cells have the property of easily collecting in the vicinity of the anode, As shown in FIG. 4, the anode is installed as a separation membrane in the center of the second fermenter 20 and the cathode is installed on the side surface. The cells are collected on the anode side, the remaining culture solution is drained from the outlet, and then charged reversely to wash and remove the cells collected on the anode with a washing solution (eg, water or electrolyte). By,
A cell concentrate of the desired photosynthetic bacteria is obtained. In addition,
Needless to say, when the photosynthetic bacterial cells have a property of easily gathering in the vicinity of the cathode, it is the same as the above embodiment except that the anode and the cathode are used in reverse. Therefore, in this way, the microbial cell concentrator can be connected to the second fermenter 20.
By culturing and assimilating the organic acid mixture with the photosynthetic bacterium, it is possible to efficiently concentrate only the cells of the desired photosynthetic bacterium from the culture solution, thereby easily purifying the cells. . Alternatively, in addition to the above, a device for collecting and concentrating cells using magnetism may be used as the cell concentration device.

In the second fermenter 20, hydrogen gas is generated by cultivation by photosynthetic bacteria, and this hydrogen gas passes through a hydrogen gas recovery pipe 28 attached to the lid 27 of the cylinder 22. To the hydrogen gas collection tank 40.

The hydrogen gas collecting tank 40 has basically the same structure as the methane gas collecting tank 30 and has a bottom plate 41 fixed to the base 1.
2, and water or electrolyzed water W is stored up to a predetermined height.

The top plate 42a of the outer cylinder 42 has a top plate 43
The inner cylinder 43 having a is fixed. This inner cylinder 43
Has a lower end open structure, which is hung down to the vicinity of the bottom plate 41, and has an open end 2 of the hydrogen gas recovery pipe 28 inside.
8a and a hydrogen gas extraction pipe 44 are provided. The projecting length of the open end 28a is short, and the hydrogen gas extraction pipe 44
Is extended so that hydrogen gas is stored in the inner cylinder 43 and drawn out from the hydrogen gas extraction pipe 44.

As described above, in the second fermenter 20, as will be described in more detail below, depending on the culturing conditions, a mixed organic substance obtained by the treatment using the photosynthetic bacterium and the enzyme / anaerobic treatment can be used. Acid is further assimilated by photosynthetic bacteria and metabolized in the cells, producing a large amount of hydrogen gas as a gas component in addition to physiologically active substances such as porphyrins, organic acid polymers, vitamins and many pigments. I do. For this reason, the hydrogen gas generated in this manner may be withdrawn from the second fermenter 20 via a valve or the like provided on the upper part of the fermenter. As shown in FIG. 1, it is preferable to be in a hydrogen gas collecting tank 40 separately installed. The hydrogen gas collected in this way can be further used for a fuel cell or the like. Therefore, as shown in FIG. 1, the treatment apparatus of the present invention preferably further includes a hydrogen gas collecting tank 40 for collecting hydrogen gas generated in the second fermenter 20. Thus, the hydrogen gas collection tank 4
The material of the hydrogen gas collection tank when 0 is provided is not particularly limited, and a known material similar to the case of the first fermenter 10 is used. In the case where the hydrogen gas collection tank 40 is provided, it is preferable that a liquid in which hydrogen is not dissolved, for example, water or an electrolyte is charged in the hydrogen gas collection tank in order to easily detect generation of gas. Further, when the hydrogen gas collecting tank 40 is provided, another hydrogen gas collecting bag or a storage system using a hydrogen storage / storage material may be used as the hydrogen gas collecting tank 40.

Here, a preferred embodiment of a method for treating used paper sludge using the apparatus for treating used paper sludge of the present invention will be briefly described below.

First, a culture solution containing waste paper sludge is aseptically put into the first fermenter 10 or the first fermenter 10
Sterilize after charging the culture solution containing waste paper sludge S inside,
An enzyme (cellulase) is added thereto and incubated under a predetermined culture condition, whereby the fiber (cellulose component) of the waste paper sludge S is reduced in molecular weight and saccharified by the enzyme;
Next, a pre-culture solution of an anaerobic bacterium was further added to the culture solution, and the mixture was incubated under a predetermined culture condition.
The sugar component produced in the previous step is organically oxidized by anaerobic bacteria to produce organic acids such as acetic acid, propionic acid and butyric acid and methane gas as a gas component; if necessary, the methane gas produced here is collected as methane gas. Collect in tank 30. Separately, a sterile culture solution containing photosynthetic bacteria is previously charged in the second fermenter 20, and the first fermenter 1
The culture solution containing the organic acid mixed component generated in Step 0 is sent to the second fermenter 20 by a pump or the like, and the light is emitted outdoors or while irradiating light (if necessary, light is also emitted from the inside using an internal luminous body). While irradiating the activated photosynthetic bacterium culture solution through a tube-like material provided outside the second fermenter 20 under a predetermined culture condition, the mixed organic acid is removed. It is assimilated by photosynthetic bacteria and metabolized in the cells to produce physiologically active substances such as porphyrins, organic acid polymers, vitamins and many pigments, and hydrogen gas as a gas component; if necessary, generated hydrogen gas Is collected in a methane gas collection tank 40.

The used paper sludge to be treated in the present invention may be used as it is from a used paper collection / collection company or a papermaking company, or may be prepared from used paper by a conventionally known method. The sludge may be water-containing or dry. In the latter case, for example, a waste paper collector and a waste paper collected at a receiving factory can be used to select a waste paper that distinguishes the paper quality according to its fiber shape and impurity content; A sorting step of removing non-fibrous contaminants such as glass and fasteners, and further removing finely crushed materials by pressure screening having small openings or pores;
A defibration step of defibrating waste paper using a digester, a kneader, a beater, etc .; a cooking step with an acid such as a sulfuric acid solution or an alkali such as a sodium hydroxide solution (chemical pulp step); plastics such as polyethylene mixed in;
A dust-removing process in which foreign matter of low-density contaminants such as coated films such as styrofoam and adhesive tape is accumulated and separated into a special sieve using a screen or a cleaner and an overcurrent portion generated in a back-flow washing machine; and into waste paper. Penetration of chemicals (eg, alkalis and detergents (surfactants))
Breakdown of adhesion between ink (further, impurities of chemical products such as adhesives, dyes, special paints, internal additives, etc.) and fibers, miniaturization of ink and dispersion in water, separation of dispersed ink and pulp (There is a flotation method in which air is blown from the lower part to attach ink to air bubbles to float and separate the ink, and a washing method in which the ink is washed off with a large amount of water, etc.). .

Further, in the present invention, waste paper is used regardless of whether it is unused paper or used paper, and waste paper, mixed paper, waste cardboard boxes and the like, which are extremely contaminated and have low gloss and low paper quality; Printed but not in the hands of readers, such as newsprint, ledgers, new corrugated cardboard and publications with little alteration or contamination, such as cuttings; used newsprint, tissue paper, paper toweling and printing paper Properties such as the type and amount of papermaking raw materials, such as white paper waste, unprinted ledgers, unprinted newsprint, etc., without any overcoating, clean and excellent gloss, and tough paper quality, gloss and strength. Regardless. Further, the waste paper according to the present invention includes pulp as a raw material for papermaking, and also pulp residue produced as a by-product in the papermaking process. For example, newspaper web; printing paper;
Uncoated printing paper such as gravure paper, printed paper, writing paper, drawing paper, etc .; Coated printing paper such as art paper, coated paper, lightweight coated paper, etc .; Packaging of heavy duty kraft paper, pure white roll paper, etc. Paper: Glassine paper, rice paper, India paper, carbon paper base paper, typewriter paper, copy paper, condenser paper, copy base paper, etc .; tissue paper; tissue paper, kyoka paper, dust paper, toilet paper, sanitary paper, towel paper, processing Household thin paper such as base paper; photosensitive paper, statistical machine card paper, continuous voucher paper, electrical insulating paper, high-quality paper, colored string paper, calligraphy paper, shoji paper, etc .; exterior liner (craft), exterior Liner (jute), interior liner,
Corrugated base paper such as pulp and shinshin; colored paperboard paperboard such as manila balls (coated), manila balls (uncoated), white balls (coated), white balls (uncoated);
Paperboard for paper containers such as yellow paperboard, chipboard and colored paperboard, waterproof base paper; construction material base paper such as gypsum board base paper; paper tube base paper;
Products made from recycled paper such as wrapping paperboard, box paper, printing paper, tissue paper, etc .; (1) softwood pulp, hardwood pulp, softwood mixed pulp, straw pulp, etc. (2) Groundwood pulp, refined mechanical pulp (refined groundwood pulp), thermomechanical pulp, chemithermomechanical pulp, chemimechanical pulp (chemiground pulp), etc .; neutral sulfite Semi-chemical pulp such as semi-chemical pulp, acid semi-sulfite semi-chemical pulp, kraft semi-chemical pulp, etc .; chemical pulp such as sulfite pulp, soda pulp, kraft pulp (sulfate pulp); unbleached pulp; semi-bleached pulp; bleached pulp, etc. Minutes by manufacturing method ), (3) paper pulp; dissolved pulp, etc. (classification according to use), hardwood bleached neutral sulfite semichemical pulp; softwood dissolved sulphite pulp; hardwood dissolved kraft pulp; softwood broadleaf mixed bleached kraft pulp, etc. Various known papers and / or pulp such as a combination of the above can be used as the waste paper. Preferably, used paper is, for example, telephone directory, newspaper, waste paper from office, and the like, and more preferably, used paper is used, for example, shredded and collected.

In the present invention, the enzymatic / anaerobic treatment is a step performed in the first fermenter. In the fermenter, the fiber (cellulose component) of the waste paper sludge is degraded by an enzyme (cellulase). -After saccharification, this is a process comprising organically oxidizing this sugar component using anaerobic bacteria. At this time, organic acids such as acetic acid, propionic acid and butyric acid, and methane gas as a gas component are generated from the fibrous material (cellulose component) of the waste paper sludge by the enzyme / anaerobic treatment according to the present invention.

As one embodiment of the enzyme / anaerobic treatment method according to the present invention, the waste paper sludge obtained above is suspended in water at a predetermined concentration, and the cellulase dissolved or suspended in a buffer in this suspension is used. Is added, and then left (incubated) at an appropriate temperature for an appropriate time to hydrolyze the β-1,4-glucopyranosyl bond of cellulose to decompose it into a sugar (glucose) component (in the present specification, “ Cellulase enzyme treatment ”or simply“ enzyme treatment ”), and a saccharide component obtained by dissolving or suspending an anaerobic bacterium (group) in a buffer solution. There is a method of culturing under the condition (also referred to herein as “anaerobic treatment”).

Alternatively, in the above embodiment, the waste paper sludge obtained above is suspended in water at a concentration of 5 to 40 (w / v)%, preferably 10 to 20 (w / v)%. After adding the cellulase dissolved or suspended in the buffer and the anaerobic bacterium (group) dissolved or suspended in the buffer, respectively, or adding the solution in which the cellulase and the anaerobic bacterium (group) are dissolved in the buffer together, After addition, add 5-5
The cells may be incubated at 0 ° C., preferably 30 to 40 ° C. for 48 to 168 hours, preferably 60 to 96 hours, under anaerobic conditions by static culture or the like.

In the above embodiment, the concentration of waste paper sludge in water is 5 to 40 (w / v)%, preferably 10 to 20 (w / v)%. At this time, if the concentration of the used paper sludge is less than 5 (w / v)%, the treatment efficiency of the used paper sludge is not sufficient, which is not preferable from an industrial viewpoint, and the product concentration is undesirably reduced. On the other hand, if the concentration of the waste paper sludge exceeds 40 (w / v)%, sufficient fluidity cannot be obtained, cellulase cannot be dispersed well in the waste paper sludge, and does not act sufficiently.
The action of enzymes and cells is impaired, which is also undesirable.

The buffer used in the present invention may be any buffer having an effective pH range of 4 to 9, preferably 7 to 8. Examples of such a buffer include phosphate buffer. , Carbonate buffer, bicarbonate buffer, Tris buffer, citrate-sodium phosphate buffer, succinate-sodium hydroxide buffer, potassium phthalate-sodium hydroxide buffer, imidazole-hydrochloride buffer, Borate buffer, physiological salt solution or HEPES (N-
Good's buffer solution with 2-hydroxyethylpiperazine-N'-2-ethanesulfonic acid), MES [2- (N-morpholino) ethanesulfonic acid] and the like.
Among these, Good's buffer such as HEPES or MES is preferably used as the buffer.

As the cellulase used in the present invention, any of a cellulase isolated from a natural microorganism and a commercially available cellulase can be used. Examples of the natural cellulase include snails, termites, Cytophaga, Sporocytoplasm
Bacteria (bacteria, actinomycetes) having cellulolytic properties such as phaga, Cellulomonas, Clostridium, etc. and Trichoderma, Asper
gillus, Penicillium, Rhizopus, Fusarium, Chaetomiu
m, Alternaria, Cladosporium, Botrytis, and other celluloses derived from mold having cellulolytic ability. Examples of commercially available cellulases include those provided by Wako Pure Chemical Industries, Ltd. and Sigma. Of these, commercially available cellulases are preferably used in view of availability.

Further, according to the present invention, the amount of cellulase to be added may be an amount capable of decomposing a sufficient amount of waste paper sludge, and varies depending on the type of enzyme used. For example, cellulase manufactured by Wako Pure Chemical Industries, Ltd. When used, it is usually 0.1 to 2.0% by weight, preferably 0.5 to 1.0% by weight, based on waste paper sludge.

[0065] The enzyme treatment conditions according to the present invention are appropriately selected depending on the kind of the enzyme to be used and the like, and are not particularly limited as long as the enzyme to be used can act. Specifically, the enzyme treatment temperature is 5 to 50 ° C, preferably 20 to 4 ° C.
0 ° C. Further, in the present invention, a suitable pH at which the cellulase used in the cellulase enzyme treatment exhibits an activity.
Since there is a value and fluctuation of the pH value significantly inhibits enzyme activity and affects saccharification, in the cellulase enzyme treatment according to the present invention, a buffer solution is used to control a large fluctuation of the pH value, and a regulator is added every time. It is preferable to adjust the pH value within a certain range by using this. Specifically, since the cellulase exhibits the maximum activity on the acidic side (around pH 5.0),
The pH of the cellulase enzyme-treated solution is usually 4.0 to 7.0.
0, preferably in the range of 4.5 to 6.5, the buffer solution, an aqueous alkaline solution such as sodium hydroxide, potassium hydroxide and calcium hydroxide or a low acid solution such as hydrochloric acid, carbonic acid and various organic acids. It is preferable to adjust the concentration using a concentration solution. Further, the enzyme treatment time is usually 24 to 96 hours, preferably 48 to 60 hours.

In the present invention, the anaerobic bacteria (group) decompose by decomposing the high molecular organic components, and the decomposed product is used in the next step instead of carbon dioxide or water by the aerobic bacteria. It can be used for anaerobic treatment because it can produce organic acids and alcohols that are nutrients necessary for metabolism and growth of photosynthetic bacteria.

The anaerobic bacterium (group) used in the present invention is not particularly limited as long as it can assimilate glucose, which is a sugar component produced by the cellulase decomposition of the waste paper sludge, and is a known anaerobic bacterium. Bacteria (group) can be used, in which case one kind of bacteria may be used alone or two or more kinds of bacteria may be used in a mixed form. Specific examples of the anaerobic bacteria (group) include Bacillus, Pseudonomas, and Acidgenes
Acid-producing bacteria and methane-producing bacteria. Alternatively, commercially available anaerobic sludge may be used as the anaerobic bacteria group. Examples of these are granular sludge (manufactured by Fuji Kasui Kogyo Co., Ltd.) and coagulating anaerobic sludge (Ishikawajima-Harima Heavy Industries, Ltd.) Manufactured). Among these, commercially available anaerobic sludge is preferably used in consideration of availability and the fact that a plurality of types of anaerobic bacteria can be used in combination.

In the present invention, the method and conditions for culturing (including both preculture and main culture) the anaerobic bacteria (group) are determined by the range of growth (pH, temperature, etc.) of the anaerobic bacteria (group) used in the present invention. ) And are known to those skilled in the art, but are anaerobic and do not aerate or aerate with nitrogen or carbon dioxide gas or by adding a reducing agent to the medium to reduce the redox potential. It is necessary that the cells be cultured under anaerobic conditions, for example, by lowering the concentration.

In the present invention, anaerobic bacteria (group)
Is preferably added to the enzyme-treated product after being acclimated (pre-cultured) in a glucose-containing medium in advance so that the product treated with the enzyme (cellulase) can be efficiently used. The specific acclimatization method in the above embodiment is not particularly limited as long as the enzyme-treated product can be efficiently assimilated.
Buffer containing ２０20 mM glucose, eg, HEP
ES buffer solution [10 mmol / dm ³ ; pH = 7.0
(Adjusting agent: 1N KOH, 1N HCl)], followed by stationary culture at 30 ° C. for 24 hours. The culture of the anaerobic bacterium (group) thus acclimated may be directly used as a medium in the solution obtained by the above-mentioned enzyme treatment. In this case, if necessary, vitamins may be added to the above-mentioned enzyme-treated solution. , A nitrogen source, a mineral and a phosphorus source (for example, a phosphate source) and the like may be added.

The cultivation conditions (anaerobic treatment conditions) of the anaerobic bacteria (group) according to the present invention include the range of growth of the strain used,
There is no particular limitation as long as it is appropriately selected depending on the composition of the medium and the culturing method, and is a condition under which the strain to be used can grow. Specifically, the culture temperature is 10 to 40 ° C, preferably 30 to 3 ° C.
5 ° C. In addition, there is an appropriate pH value at which the anaerobic bacterium (group) to be used has an activity, and fluctuation of the pH value significantly inhibits the activity and affects the growth of the bacterium. In the cultivation, it is preferable to use a buffer solution as described above to control large fluctuations in the pH value, and to adjust the pH value within a certain range using a regulator every time. Specifically, the pH of the medium during the cultivation of the anaerobic bacterium (group) according to the present invention is usually 6 to 9, preferably 7 to 9.
The concentration is adjusted using the above buffer solution, an aqueous alkali solution such as sodium hydroxide, potassium hydroxide and calcium hydroxide, or a low concentration solution of an acid such as hydrochloric acid, carbonic acid and various organic acids. In addition, the culture time is usually 48
１６168 hours, preferably 60-96 hours.

Further, according to the present invention, anaerobic bacteria (group)
The amount of anaerobic bacteria used may be an amount that can sufficiently assimilate sugars generated by decomposition by cellulase into organic acids, and varies depending on the type of anaerobic bacteria (group) used. For example, granule sludge (Fujikasui Industrial Co., Ltd.)
0.5 to 5.0% by weight based on waste paper sludge,
Preferably it is 1.0 to 2.0% by weight.

Alternatively, as the enzyme / anaerobic treatment method according to the present invention, the waste paper sludge obtained above is suspended at a predetermined concentration in water, and an enzyme-containing microbial preparation dissolved or suspended in a buffer in this suspension. And then incubating at a predetermined temperature for a predetermined time under anaerobic conditions. In this method, since the enzyme-added microbial preparation contains one or more enzymes such as a plurality of types of anaerobic bacteria and cellulase, the enzyme treatment is carried out as in the first embodiment. In addition to the two steps of anaerobic treatment and anaerobic treatment, waste paper sludge can be decomposed (saccharified) and saccharide can be converted to organic acids in one step, and thus it is preferably used in the present invention.

The enzyme-added microbial preparation used in the above embodiment includes paper sludge (Paper Sludge) (P
S) Paper Sludge (PS) series (EN) such as 200A, 200L, 500A and 500F
BIO INC. Manufactured).

Further, according to the present invention, the amount of the enzyme-added microbial preparation may be any amount that can sufficiently assimilate the waste paper sludge with the organic acid, and depends on the type of the enzyme-added microbial preparation used. Is usually
It is 0.1 to 2.0% by weight, preferably 0.5 to 1.0% by weight.

The conditions of the enzyme / anaerobic treatment according to the present invention are appropriately selected depending on the kind of the enzyme-added microorganism preparation to be used, and are not particularly limited as long as the preparation to be used can work. Specifically, the enzyme / anaerobic treatment temperature is 5
-40 ° C, preferably 30-35 ° C. In addition, in the present invention, in the enzyme / anaerobic treatment using the enzyme-added microbial preparation, an appropriate pH at which the preparation used exhibits an activity.
PH value fluctuation significantly inhibits the activity and affects the production of organic acids.Therefore, in the enzymatic / anaerobic treatment with the enzyme-added microbial preparation of the present invention, a large fluctuation of the pH value is caused by using a buffer solution. It is preferable to control the pH value and adjust the pH value within a certain range using a regulator every time. Since most of the enzyme-containing microbial preparations used in the present invention exhibit the maximum activity near neutral (pH 7), the pH of the enzyme-containing microbial preparation treatment solution is usually 5 to 8, preferably 7 to 7.
The concentration is adjusted using the above buffer solution, an aqueous alkali solution such as sodium hydroxide, potassium hydroxide and calcium hydroxide, or a low concentration solution of an acid such as hydrochloric acid, carbonic acid and various organic acids. Furthermore, the enzymatic / anaerobic treatment time is usually 24 to 96 hours, preferably 48 to 60 hours.

According to the method of the present invention, such a simple enzymatic / anaerobic treatment enables 30-70 waste paper sludge to be recovered.
% By weight, preferably 40-50% by weight, can be converted to an organic acid mixture. The organic acids contained in this organic acid mixture include acetic acid, propionic acid, butyric acid and lactic acid, especially acetic acid, propionic acid and butyric acid.

In the present invention, a step of assimilating the mixed organic acid obtained by the above-described enzyme / anaerobic treatment with photosynthetic bacteria in the second fermenter is essential. That is, sending the solution containing the organic acid obtained in the step in the first fermenter to the second fermenter, and culturing photosynthetic bacteria using the organic acid as a nutrient source in the second fermenter. As a result, the organic acid is assimilated and metabolized in the cells, and the used paper or the used paper sludge which has been conventionally discarded is purified and deodorized, and furthermore, is recycled as a useful substance.

The photosynthetic bacterium used in the present invention is not particularly limited as long as it can assimilate the organic acid produced by the above-described enzyme / anaerobic treatment, and is a conventionally known photosynthetic bacterium belonging to the order Rhodospirillaceae. Can be used. Specifically, the genus Rhodobacter (Rhodobacter), the genus Rhodopseudomonas (Rhodopseudomonas), the genus Rhodospirillum (Rhodospirillum), the genus Rhodocycla (Rhodocyclu
s) and Rhodospirillaceae, such as Rhodomicobium; Chromaium (Chroma)
tium), Thiocystis, Thiospillum and Thiocapsa, etc .; Chromantiaceae; Ectothiorhodospira; (Chlor
obium), genus Prostecochloris (Prosthecochloris), genus Prelodictyon (Prelodictyon) and chlorochromatium (Chlorochromatium), such as Chlorobiaceae (Chlor
obiaceae); and the genus Chloroflexu
s), Chloronema and Oscillocris
Chlorofleaceae (Chlorofle) such as (Oscillochloris)
xaceae) and the like. Among these, the genus Rhodopseudomonas rum (Rhodobacter sp.), Such as Rhodobacter sp. Rhodospirillum, Chromium sp.
atium sp.) Chromatium is preferably used as a photosynthetic bacterium. The photosynthetic bacteria may be used alone or in a mixture of two or more. Alternatively, commercially available photosynthetic bacteria (often in the form of a mixture of two or more types) may be used. Examples of such commercially available photosynthetic bacteria include PSB (produced by Nippon PSB) and photosynthetic bacteria (Kobayashi). Microbial Science Laboratory), preferably PSB
(Manufactured by Nippon PSB Co., Ltd.) is used.

In the present invention, the photosynthetic bacterium is cultured by pre-culturing the photosynthetic bacterium, aseptically charging the pre-cultured liquid into the second fermentation tank, and then fully organically oxidizing the first fermentation tank. The culture broth inside is sent to the second fermenter, and the mixed culture broth is irradiated outdoors or while irradiating light (if necessary, irradiating light from inside using an internal luminous body). ), By culturing the photosynthetic bacterium while circulating the culture solution of the photosynthetic bacterium activated by the auxiliary member formed of a tube-like material provided outside the second fermenter. Alternatively, the photosynthetic bacterium is cultured by feeding the culture solution in the first fermenter, which has been sufficiently organically oxidized, to the second fermenter, and then pre-cultivating the pre-cultured photosynthetic bacterium in the second fermenter. Aseptically charged into the fermenter, and the culture solution thus mixed is radiated outdoors or while irradiating light (if necessary, irradiating light from the inside with an internal luminous body). This may be performed by culturing the photosynthetic bacteria while circulating the culture solution of the photosynthetic bacteria activated by the auxiliary member formed of a tube-like material provided outside the second fermenter. At this time, if necessary, in addition to the pre-culture liquid, meat extracts, peptone, yeast extract, soybean and wheat hydrolysates such as taste liquid, soybean powder, milk casein, casamino acid, various amino acids, corn steep Organic nitrogen compounds such as liquor, other animal, plant and microbial hydrolysates and ammonium sulfate [(NH ₄ ) ₂ S
Nitrogen sources such as ammonium salts such as O ₄ ]; thiamine hydrochloride (Tiamine-HCl), nicotinic acid, p-aminobenzoic acid,
Vitamin solution ₁₂ such as biotin and vitamin B; magnesium, manganese, calcium, sodium, potassium,
As a nutrient source for cell growth, phosphates such as molybdenum, strontium, boron, copper, iron, tin and zinc, inorganic salts such as sulfates, butyrate, propionate and acetate are used as secondary nutrients for cell growth. It may be added to the fermenter.

Specifically, as the pre-culture medium, MY
C (Malate-Yeast-Cazamino acid) medium (composition / 1 liter: 1.0 g DL-sodium malate)
alate), 3.0 g yeast extract, 2.0 g casamino acid; pH 6.8).
SVS (Succinate-Vitamin solution-Ammonium sulfat
e) Medium (composition / 1 liter: 100 ml mineral base, 1.0 g ammonium sulfate, 5.
4 g sodium succinate, 1.0 ml A vitamin solution was made up to a total volume of 500 ml with distilled water, to which 20 mmol / dm ³ potassium dihydrogen phosphate (KH ₂ PO ₄ ) dissolved in 500 ml distilled water was added; pH 7.2. ). At this time, the mineral base (meneral base) is 2.0 g
Magnesium chloride hexahydrate (MgCl ₂ .6H ₂ O),
2.0 g sodium chloride, 0.45 g calcium chloride dihydrate (CaCl ₂ .2H ₂ O) and 10 ml SL
-8 [composition: 1.5 g iron chloride tetrahydrate (FeCl _2.
4H ₂ O), 0.07 g zinc chloride, 0.062 g H ₂
BO _4, 0.017 g of copper chloride dihydrate (CuCl ₂ · 2
_{H 2 O), 0.034g Na 2} MoO 4 · 2H 2 O, 5.
_{2g EDTA-Na, 0.1g MnCl 2} · 4H
₂ O, 0.19 g CoCl ₂ .6H ₂ O and 0.024
g NiCl ₂ .6H ₂ O prepared with distilled water to a total volume of 1 liter] means a solution prepared by using distilled water to a total volume of 1 liter, and the vitamin solution is 0.05 g of thiamine hydrochloride, 0.1 g. 05g nicotinic acid, 0.03g p
-Aminobenzoic acid, 0.01 g biotin and 0.00
Means a solution prepared to a total volume of 1 liter 5g vitamin B ₁₂ with distilled water.

The method and conditions for culturing (including both pre-culture and main culture) of the photosynthetic bacterium performed in the present invention are based on the growth range (pH, temperature, etc.) of the photosynthetic bacterium used in the present invention.
As is known to those skilled in the art, photosynthetic bacteria are facultatively anaerobic and do not aerate. Alternatively, the photosynthetic bacterium may be cultured under anaerobic conditions while aerating with argon or carbon dioxide gas, or reducing the oxidation-reduction potential by adding a reducing agent to the medium.

The conditions for culturing the photosynthetic bacterium according to the present invention are appropriately selected depending on the range of growth of the strain to be used, the composition of the culture medium and the culturing method, and are not particularly limited as long as the strain to be used can grow. Therefore, it is necessary to shine light. At this time, the light may be sunlight or artificially irradiated with a fluorescent lamp, a tungsten lamp or the like. In the latter case, the light irradiation amount is usually 5,000.
~ 50,000lux, preferably 10,000 ~ 1
5,000 lux. As the culture conditions, specifically, the culture temperature is 5 to 40 ° C, preferably 25 to 40 ° C.
35 ° C. In addition, there is an appropriate pH value at which the photosynthetic bacterium used has an activity, and fluctuations in the pH value significantly inhibit the activity and affect the growth of the bacterium. It is preferable to use a solution to control large fluctuations in the pH value, and to adjust the pH value within a certain range using a regulator every time. Specifically, the pH of the above-mentioned buffer and sodium hydroxide is adjusted so that the pH of the medium during the culturing of the photosynthetic bacterium according to the present invention is usually in the range of 6 to 8, preferably 6.5 to 7.5. , Potassium hydroxide and calcium hydroxide or a low-concentration solution of an acid such as hydrochloric acid, carbonic acid and various organic acids. Further, the culture time is usually 24 to 60 hours, preferably 36 to 48 hours.

By the treatment using such a photosynthetic bacterium, the mixed organic acid obtained by the enzymatic / anaerobic treatment is further assimilated by the photosynthetic bacterium and purified and deodorized by being metabolized in the cells. Since the metabolic function of photosynthetic bacteria includes biosynthesis of physiologically active substances such as vitamins and many pigments, the culture solution of photosynthetic bacteria obtained in this way or its diluted solution is used in oligotrophic soil such as sandy soil. As a nutrient for vegetable and house cultivation areas, as a growth promoter for vegetables, fruits and plants, and as a soil conditioner, is effective for cultivation of many vegetables and fruits, and is also effective for improvement of pasture and red soil. Be expected.

As described above, by using the apparatus of the present invention, the enzymatic / anaerobic treatment and the cultivation / assimilation process using photosynthetic bacteria can be performed continuously and in a closed system. The danger can be reduced and the operation is simple and efficient.

[0085]

As described above, the waste paper sludge treatment apparatus of the present invention comprises: a first fermenter for producing an organic acid mixed component by subjecting waste paper sludge to an enzyme / anaerobic treatment; It is characterized by having a second fermenter for allowing photosynthetic bacteria to act on the components, and an auxiliary member for assisting the culture of the second fermenter with the photosynthetic bacteria. Therefore, the operations of reducing the molecular weight of waste paper sludge (decomposing it into sugar components) by the enzyme cellulase, organically oxidizing this sugar component by anaerobic treatment, and metabolizing this organic acid by photosynthetic bacteria are performed continuously and in a closed system. Because it can be carried out, many paper wastes that presently have a problem in treatment, such as sludge waste liquid, recovered waste paper, and used paper, can be reduced, assimilated, and deodorized in one step and continuously. Furthermore, the apparatus of the present invention has the advantage that the risk of contamination of the culture solution can be significantly reduced because the above-mentioned steps can be performed continuously and in a closed system.

Further, physiologically active substances such as porphyrins, organic acid polymers, vitamins and many pigments finally obtained by using the apparatus of the present invention can be used for nutrients in oligotrophic soils such as sandy lands and house cultivation lands. It can be expected to be effective for cultivation of many vegetables and fruits as an agent, a growth promoter for vegetables, fruits and plants, and as a soil conditioner, and can also be expected to be effective for improving pasture and red soil. In addition, when the apparatus of the present invention further has a gas collection tank, methane gas or hydrogen gas obtained from the first fermentation tank or the second fermentation tank using this gas collection tank is stored in the gas collection tank. Since the gas is stored, the methane gas or the hydrogen gas thus stored can be further effectively used in various fields such as a fuel cell.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a used paper sludge processing apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic sectional view of a second fermenter according to an embodiment of the internal light emitter in the second fermenter of the present invention.

FIG. 3 is a schematic cross-sectional view of a second fermenter showing one embodiment relating to the external installation of a tubular material on the second fermenter according to the present invention.

FIG. 4 is a schematic sectional view of a second fermenter according to an embodiment of the apparatus for concentrating cells in the second fermenter of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... First fermentation tank, 11 ... Bottom plate, 12 ... Outer cylinder, 14 ... Inner cylinder, 14a, 14b ... Through hole, 15 ... Outflow pipe, 16 ... Methane gas recovery pipe, 17 ... Heater, 20 ... Second Fermenter, 22: cylindrical body, 23: internal luminous body, 23a: transparent cylindrical body, 23b: reflective tape, 24: auxiliary member, 25: shelf member, 26: liquid-permeable member, 28: hydrogen gas recovery tube Reference numeral 30: methane gas collection tank, 32: outer cylinder, 33: inner cylinder, 34: methane gas extraction pipe, 40: hydrogen gas collection tank, 44: hydrogen gas extraction pipe, S: used paper sludge, P: pump.

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[Procedure amendment]

[Submission date] February 7, 2000 (2000.2.7)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 3

FIG. 4

Claims (9)

[Claims] 1. A first fermenter for producing an organic acid mixed component by treating waste paper sludge with an enzyme / anaerobic treatment, and a second fermenter for allowing photosynthetic bacteria to act on the organic acid mixed component. And an auxiliary member for assisting the culture of the second fermenter with photosynthetic bacteria. 2. The apparatus according to claim 1, wherein the auxiliary member is constituted by a tube externally attached to the second fermenter. 3. The apparatus according to claim 1, wherein the auxiliary member is provided with a reflection tape body between the tubular material and the second fermenter. 4. A gas collecting tank for storing gas generated in the first and / or second fermenter,
The device according to claim 1. 5. The apparatus according to claim 4, wherein the gas collecting tank is a methane gas collecting tank for collecting methane gas generated in the first fermenter. 6. The apparatus according to claim 4, wherein the gas collecting tank is a hydrogen gas collecting tank for collecting hydrogen gas generated in the second fermenter. 7. The apparatus according to claim 1, wherein the second fermenter is provided with an internal light emitter. 8. The second fermenter according to claim 1, wherein a shelf member is provided inside, and a liquid-permeable member containing photosynthetic bacteria is placed on the shelf member. The device according to item. 9. The apparatus according to claim 1, wherein the second fermenter further comprises a cell concentrator for concentrating cells.