JP2011212592A - Method for preparing biomass feedstock originated from waste - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for preparing biomass feedstock originated from waste for utilizing waste, for example, as starting material for manufacturing bioethanol by saccharifying fermentation.SOLUTION: The method for preparing the biomass feedstock originated from the waste includes: a step of dissociating papers-based waste essentially comprising papers into dilution water; a step of suspending garbages-based waste essentially comprising garbages into dilution water; a step of mixing dissociation liquid of the papers-based waste and suspension liquid of the garbages-based waste to form a liquid mixture; and a step of producing highly concentrated biomass feed stock and water for discharge by dehydrating the obtained liquid mixture. In the step of producing the dissociation liquid of the papers-based waste and the step of producing suspension liquid of the garbages-based waste or the step of mixing both steps, foreign matter removal treatment is preferably performed. The water for discharge is recycled as dilution water for the step of dissociating papers-based waste and/or the step of suspending garbages-based waste.

Description

  The present invention relates to a method for preparing a waste-derived biomass raw material for using waste as a raw material for producing bioethanol, for example, by saccharification and fermentation, specifically, paper-based waste mainly containing paper, and waste Containing industrially very effective waste-derived biomass raw materials that can simultaneously treat different types of raw materials, such as moss-based wastes, mainly containing wastewater, and achieve a high concentration of waste-derived biomass raw materials It is.

 In recent years, global warming has raised awareness of global warming, and CO2 and other greenhouse gas emissions have been reduced, renewable energy has been used, and energy-saving technologies have been developed. The use of resources can be mentioned.

 In general, biomass resources such as pruned branches, sewage sludge, and agricultural waste are known, but 60 to 65% of the general waste disposed of by incineration is paper and potatoes (from the Ministry of the Environment website). It is a biomass resource.

 These biomass resources are currently over 24 million tons per year, and it can be said that the development of methods for utilizing biomass resources is an urgent issue.

 However, at present there is no effective treatment method, and studies are being made on composting and composting by methane fermentation, but almost all paper and moss wastes are incinerated. Currently. This is because it is difficult to extract biomass resources from miscellaneous waste.

 It is thought that it is possible to extract biomass resources by suspending paper and straw waste in water, but because the raw material concentration becomes dilute and the series of treatments becomes large, Not only is the equipment cost high, but the method of using raw materials is also limited.

 In addition, it is known that waste can be classified into waste containing a lot of paper and waste containing a lot of waste by mechanical separation methods such as specific gravity sorting. There is only a study of using the product as a substrate for methane fermentation.

 For example, Patent Document 1 below describes a method for separating and recovering the cellulose component of paper from wastes in which paper and other waste are mixed, and removes foreign matters by disaggregating the paper. In addition, the cellulose content of the fiberized paper is collected.

 Patent Document 2 below describes a method of forming 30 to 60% pellets from a raw material containing starch and performing simultaneous saccharification and fermentation by solid fermentation.

 Furthermore, in Patent Document 3 below, after pulverizing food waste, starch concentration is prepared, saccharification enzyme is added to perform saccharification, and alcohol is fermented using an enzyme (for example, Zymomonas mobilis) to obtain ethanol. A method is described.

JP 2002-159953 A JP 2005-65695 A JP 2007-111590 A

  However, in order to recover as much biomass resources as possible contained in waste, it is necessary to recover as much paper and moss as possible, remove as much fermentation-inappropriate and difficult-to-ferment substances as possible, and increase the concentration of raw materials. However, the technique described in the above-described conventional patent document has a problem that sufficient processing cannot be performed. In particular, moss has a high viscosity and is often not suitable for mechanical dehydration, and drying with heat as used in compost takes time, and there is a problem that electric power or the like is required as a heat source.

   The object of the present invention is to solve the above-mentioned problems of the prior art and to increase the concentration of biomass resources consisting of paper-based waste mainly containing paper and moss-based waste mainly containing moss. To increase the concentration of the target product, and to increase the concentration of the above-mentioned biomass resources, the processing equipment becomes smaller and the equipment cost is reduced, In addition, by increasing the concentration of biomass resources, the range of use as raw materials is expanded, so the amount of resources recovered from waste increases, which leads to a reduction in carbon dioxide emissions, and can be used for emissions trading. An object of the present invention is to provide a method for preparing a waste-derived biomass raw material that can significantly reduce wastewater treatment by recycling and using discharged water during treatment.

  As a result of intensive studies in view of the above points, the present inventors have a high viscosity and are often not suitable for mechanical dehydration, but paper and moss are each diluted with water, After obtaining the paper disaggregation liquid and the suspension of moss, they are mixed and dehydrated together, so that the sticky material of moss is entangled with the fibers of the paper and the dehydration can be performed. In addition, since the sediment component is transferred to the drainage water after dehydration, it has been found that wastewater treatment can be greatly reduced by continuous circulation of the drainage water, and the present invention has been completed. is there.

 In order to achieve the above-mentioned object, the invention of the method for preparing a waste-derived biomass raw material according to claim 1 is a process in which a paper waste mainly containing paper is disaggregated into dilution water to generate a disaggregation liquid. And a step of suspending moss-based waste mainly containing moss in dilution water to produce a suspension, a paper-type waste disaggregation solution and a sewage-type waste suspension. It is characterized by comprising a step of mixing and forming a mixed solution, and a step of dehydrating the obtained mixed solution to produce a highly concentrated biomass raw material and discharge water.

 The invention of claim 2 is a method for preparing the waste-derived biomass raw material according to claim 1, wherein a process for producing a paper-based waste disaggregation liquid and a process for producing a suspension of moss-based waste, Alternatively, a foreign matter removal process is performed in the mixing step of the paper-type waste disaggregation liquid and the waste-type waste suspension.

 The invention of claim 3 is the method for preparing the waste-derived biomass raw material according to claim 1 or 2, wherein the discharge water discharged from the dehydration step of the mixed solution is used to produce a paper-based waste disaggregation solution. It is characterized by being reused as dilution water in a process and / or a process for producing a suspension of moss-based waste.

 Invention of Claim 4 is a preparation method of the waste-derived biomass raw material as described in any one of Claims 1-3, Comprising: The discharge water discharged | emitted from the spin-drying | dehydration process of a liquid mixture is derived from waste It is characterized by being used for the concentration adjustment processing of biomass raw materials.

 Invention of Claim 5 is a preparation method of the waste origin biomass raw material as described in any one of Claims 1-4, Comprising: Processing temperature is 60 to 95 degreeC, It is characterized by the above-mentioned. .

 Invention of Claim 6 is a preparation method of the biomass raw material of a waste material as described in any one of Claims 1-5, Comprising: The production | generation process of the disaggregation liquid of paper-type waste, and moss-type waste It is characterized in that the pH of the treatment liquid is adjusted in the production suspension generation process, or the paper-type waste disaggregation liquid and the waste-type waste suspension mixing process.

  The invention of the method for preparing a waste-derived biomass raw material according to claim 1 includes a step of disaggregating paper-based waste mainly containing paper into diluted water to produce a disaggregation liquid, and Suspending wastes in dilute water to produce a suspension, mixing paper waste waste solution and waste waste suspension to form a mixture According to the invention of claim 1, the method comprises a step and a step of dehydrating the obtained mixed liquid to produce a highly concentrated biomass raw material and discharge water. By increasing the concentration of biomass resources consisting of paper-based wastes that mainly contain potatoes and moss-based wastes that mainly contain moss, it is possible to increase the concentration of microbial assimilation components. Realization of high concentration, and by increasing the concentration of the above biomass resources, the processing equipment becomes smaller, The reduction of equipment costs and the increased concentration of biomass resources expands the range of use as raw materials, increasing the amount of resources recovered from waste, leading to a reduction in carbon dioxide emissions and In addition to being able to be used, there is an effect that the waste water treatment can be significantly reduced by circulating and using the discharged water being treated.

 The invention of claim 2 is a method for preparing the waste-derived biomass raw material according to claim 1, wherein a process for producing a paper-based waste disaggregation liquid and a process for producing a suspension of moss-based waste, Alternatively, in the mixing step of the paper-based waste disaggregation liquid and the waste-based waste suspension, the foreign matter removal treatment is performed. According to the invention of claim 2, the paper and waste Foreign matter can be removed by once diluting the moss with water, and after removing the foreign matter from the paper disaggregation liquid and the suspension of the moss, they are mixed and dehydrated together. In addition, a sticky sticky material is entangled with paper fibers, and it is possible to perform dehydration.

 The invention of claim 3 is the method for preparing the waste-derived biomass raw material according to claim 1 or 2, wherein the discharge water discharged from the dehydration step of the mixed solution is used to produce a paper-based waste disaggregation solution. It is characterized by being reused as dilution water in the process and / or the production process of the suspension of moss-based waste. According to the invention of claim 3, the discharged water being treated is recycled. Thus, there is an effect that waste water treatment can be significantly reduced.

 Invention of Claim 4 is a preparation method of the waste-derived biomass raw material as described in any one of Claims 1-3, Comprising: The discharge water discharged | emitted from the spin-drying | dehydration process of a liquid mixture is derived from waste The present invention is characterized in that it is used for the biomass raw material concentration adjustment process. According to the invention of claim 4, the waste water treatment can be significantly reduced by circulating and using the discharged water being treated. Play.

 is doing.

 Invention of Claim 5 is a preparation method of the waste origin biomass raw material as described in any one of Claims 1-4, Comprising: Processing temperature is 60 to 95 degreeC, It is characterized by the above-mentioned. Therefore, according to the invention of claim 5, since the raw material of paper-based waste and moss-based waste is derived from waste, it contains a lot of germs, and a series of reactions or a part thereof By treating at a temperature of 60 ° C. to 95 ° C., it is possible to prevent the spoilage of unnecessary raw materials derived from various bacteria and the spoilage of discharge water.

 Invention of Claim 6 is a preparation method of the biomass raw material of a waste material as described in any one of Claims 1-5, Comprising: The production | generation process of the disaggregation liquid of paper-type waste, and moss-type waste The pH of the treatment liquid is adjusted in the step of producing a suspension of waste, or in the step of mixing a paper-type waste disaggregation solution and a waste-type waste suspension. According to 6th invention, there exists an effect that the waste origin biomass raw material suitable for ethanol fermentation can be prepared, for example.

It is a block diagram which shows embodiment of the preparation method of the waste origin biomass raw material of this invention.

  Next, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.

  FIG. 1 is a block diagram showing an embodiment of a method for preparing a waste-derived biomass material according to the present invention.

  Referring to the figure, a method for preparing a waste-derived biomass raw material according to the present invention includes a deaggregation treatment step of deaggregating paper-based waste mainly containing paper into dilution water to generate a degrading liquid; Suspension process to produce a suspension by suspending moss-based waste mainly containing sewage and mixing paper waste lysate and sewage-based waste suspension Thus, the method includes a mixing step of forming a mixed solution and a step of dehydrating the obtained mixed solution to generate a highly concentrated biomass raw material and discharge water.

  Here, the step of disaggregating waste mainly containing paper with water and the step of suspending waste mainly containing wastes with water can be performed in the same tank. That is, after a waste containing mainly papers is stirred and disintegrated with water in one stirring tank, the paper waste waste solution is transferred to the mixing tank, and then the main waste is stored in the same stirring tank. The waste contained in is stirred and suspended with water, and this suspension of waste waste is placed in a mixing tank and mixed with the paper waste waste solution.

  Alternatively, a process of disintegrating waste mainly containing paper with water and a process of suspending waste mainly containing wastes with water, simultaneously in separate tanks, The suspension of the disaggregation liquid and the moss waste is put into a mixing tank and mixed.

 Further, in the present invention, a process for producing a paper-based waste disaggregation liquid and a process for producing a suspension of waste-based waste, or a paper-based waste disaggregation liquid and a suspension of the waste-based waste In the liquid mixing step, it is preferable to perform a foreign matter removing process using a screen.

 Then, the discharge water discharged from the dehydration step of the mixed solution is reused as dilution water in the paper waste generation process and / or the waste suspension generation process.

 Moreover, the discharge water discharged | emitted from the spin-drying | dehydration process of a liquid mixture is utilized for the density | concentration adjustment process of a waste origin biomass raw material.

 Here, the waste can be classified into a waste containing a large amount of paper and a waste containing a large amount of waste by a mechanical separation method such as specific gravity sorting. Since papers are surface-treated or exist in combination with plastics, metals, etc., papers are disaggregated with water, and unsuitable biomass materials are separated by particle size during this disaggregation process. A step of removing can be included.

 On the other hand, moss retains its original shape such as vegetable scraps, and thus is homogenized and refined by suspending in water. During this suspension treatment, a step of separating and removing unsuitable biomass raw materials by particle size or the like can be included.

 Then, the paper waste waste solution and the waste waste suspension are placed in a mixing tank and mixed. The mixed slurry of pulp and straw generated by this mixing process can be introduced into a mechanical dehydrator.

 Furthermore, since the dehydrated liquid generated in the mechanical dehydration process contains subdivided biomass components and water-soluble components of moss, this water can be reused as disaggregation water or suspension water. Unrecovered components can be recovered.

The treatment temperature in each step is preferably 60 ° C to 95 ° C. Here, since the raw materials of paper-type waste and moss-type waste are derived from waste, many miscellaneous bacteria are included, and a series of reactions or a part thereof is performed at 60 ° C. to 95 ° C., preferably By carrying out at 70 ° C. to 85 ° C., it is possible to prevent spoilage of unnecessary raw materials derived from germs and spoilage of water, and to suppress the propagation of germs.

 The use ratio of cocoons and papers varies depending on the properties of the raw materials, but it is desirable that the dry weight ratio is at least 30% for papers or 70% for moss.

 Also, in the process of producing the paper-based waste disintegration liquid and the waste-type waste suspension, or in the process of mixing the paper-type waste disaggregation liquid and the waste-type waste suspension. By adjusting the pH of the treatment liquid, for example, a waste-derived biomass material suitable for ethanol fermentation can be prepared.

  According to the method for preparing a waste-derived biomass raw material of the present invention, by increasing the concentration of biomass resources, the concentration of microbial assimilation components can be increased, and the subsequent concentration of the target product can be increased.

  According to the method for preparing a waste-derived biomass raw material of the present invention, the processing equipment becomes smaller and the equipment cost is reduced by increasing the concentration of biomass resources.

  According to the method for preparing a waste-derived biomass raw material of the present invention, by increasing the concentration of biomass resources, the range of use as raw materials is widened, so that the amount of recovered resources from waste is increased and the amount of carbon dioxide emissions is reduced. Connected and can be used for emissions trading.

  According to the method for preparing a waste-derived biomass raw material of the present invention, wastewater treatment is reduced or eliminated by circulating and using discharge water.

  The method for preparing a waste-derived biomass raw material of the present invention can be applied to general waste itself, but when considering the foreign matter removal efficiency, paper-based wastes and wastes mainly containing paper by machine sorting It is desirable to separate and process the wastes that are mainly contained. Furthermore, if paper such as business waste generated from offices is the main waste, and waste such as business waste derived from supermarkets and restaurants is the main waste, it is processed without machine sorting. be able to.

 Next, examples of the present invention will be described, but the present invention is not limited to these examples.

Example 1
Suspension treatment was performed with a mixer using garbage (1) generated from home and two kinds of garbage (2) (3) generated from a cafeteria. Suspension treatment was carried out at the last minute concentration that allows appropriate mixing during suspension and enables mixing. Furthermore, by adding 5 ml of 100 mM acetate buffer (pH 4.5) to 30 g of the obtained suspension and adding 2 ml of enzyme (Celic Ctec), the sugar potential (glucose potential) of the koji suspension, and The actual glucose concentration was determined. The obtained results are shown in Table 1 below.

 As apparent from the results in Table 1, the final slurry concentration of the suspension of moss did not reach 12% in all cases, and the actual glucose concentration was about 3.5% at the maximum. Therefore, when this is used as a raw material for ethanol fermentation, the ethanol concentration is less than 2 vol% at the maximum, so a large amount of energy is required by distillation, resulting in a poor energy recovery rate.

 On the other hand, in the method of the present invention, the pulp disaggregation solution prepared with 5% by weight of OA paper is added to the above-mentioned household garbage (1) and two kinds of garbage (2) generated from the dining room (2) ( Each of the suspensions of 3) was mixed, and each mixture was dehydrated to a final slurry concentration of 15 w%. For this mixed dehydrated product, the glucose potential was similarly determined by an enzyme, and as shown in Table 1 above, the glucose concentration increased significantly in each case.

 Therefore, if it is paper pulp, even if the slurry concentration of the paper pulp is thin, it was found that it can be dehydrated by mixing with the koji suspension and can be used as a high-concentration biomass raw material by dehydration. .

Claims (6)

 Dispersing paper waste mainly containing paper into dilution water to produce a disaggregation liquid, and suspending waste waste mainly containing waste into suspension with dilution water A mixture of paper waste waste solution and waste waste suspension to form a mixture, and dehydrating the resulting mixture to increase the concentration A method for preparing a waste-derived biomass raw material, comprising a step of generating a produced biomass raw material and discharge water.  In the process of generating the paper waste decontamination liquid and the waste liquid waste generation process, or in the process of mixing the paper waste disaggregation liquid and the waste waste suspension, The method for preparing a waste-derived biomass raw material according to claim 1, wherein a removal treatment is performed.  The waste water discharged from the dehydration process of the mixed liquid is reused as dilution water in the process of producing a paper-type waste disaggregation liquid and / or in the process of producing a suspension of moss-based waste. The method for preparing a waste-derived biomass raw material according to claim 1 or 2.  The waste-derived biomass according to any one of claims 1 to 3, wherein the discharge water discharged from the dehydration step of the mixed liquid is used for concentration adjustment processing of the waste-derived biomass raw material. Raw material preparation method.  The process temperature is 60 degreeC-95 degreeC, The preparation method of the waste origin biomass raw material as described in any one of Claims 1-4 characterized by the above-mentioned.  In the process of generating the paper waste decontamination liquid and the waste liquid waste generation process, or in the process of mixing the paper waste disaggregation liquid and the waste liquid suspension The method for preparing a waste-derived biomass raw material according to any one of claims 1 to 5, wherein the pH of the liquid is adjusted.

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