JP5184765B2 - Low odor composting method - Google Patents
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Description
本発明は低臭気な堆肥化処理方法に関する。詳しくは家庭や飲食店等から排出される大量の生ごみや食品加工・焼酎工場から排出される焼酎粕などの食物残滓を堆肥化する際の臭いの発生を抑えた処理方法に係るものである。 The present invention relates to a low-odor composting method. Specifically, it relates to a treatment method that suppresses the generation of odor when composting food waste such as large amounts of garbage discharged from homes and restaurants, and shochu discharged from food processing and shochu factories. .
生ゴミなど含水率の高い(75%〜90%)食物残滓の堆肥化処理方法においては、例えば図3に示す有機性固形廃棄物の堆肥化処理方法がある。この発明は生ゴミにて代表される有機性固形廃棄物101を破砕又はそのままの状態で受入れ、通性嫌気的な条件下で貯留処理102、次いで有機性固形廃棄物101を含水率70%以下に脱水処理し、固形状材料103と分離汚水とに分離する脱水処理工程104、脱水に伴う分離汚水を貯留する分離汚水貯留工程105、および脱水後の固形状材料103を好気的条件下で発酵処理する発酵処理工程106を有し、該発酵処理工程106において、発酵中の固形状材料103の含水率が発酵のための適正値を維持するように、前記分離汚水貯留工程105で貯留された分離汚水を発酵中の固形状材料103に散水する構成とするものである(特許文献1参照。)。
As a composting method for food residue having a high water content such as raw garbage (75% to 90%), there is a composting method for organic solid waste shown in FIG. 3, for example. The present invention accepts organic
このように食物残滓の含水率を65%〜70%に調整して、発酵処理を行うことが最も効率の良い発酵処理として認められているが、図4の堆肥化処理工程における発酵温度推移グラフで示すように、含水率を65%とした状態で発酵菌を添加した場合には好条件下での発酵・分解により急激な発酵温度が上昇し、24時間後には78.5℃の最高温度となる。 Thus, although adjusting the moisture content of food residue to 65% -70% and performing a fermentation process is recognized as the most efficient fermentation process, the fermentation temperature transition graph in the composting process of FIG. As shown in Fig. 4, when fermenting bacteria is added in a state where the water content is 65%, the rapid fermentation temperature rises due to fermentation and decomposition under favorable conditions, and the maximum temperature of 78.5 ° C is reached after 24 hours. It becomes.
ここで温度上昇に伴い食物残滓に含まれる水分が分離されて泥状化するために、通気性不良となり嫌気性状態に陥り、不良となり嫌気性状態に陥り、乳酸発酵に転じることにより酸性化し、発酵菌が死滅する。そしてこの嫌気性発酵が進むことにより発生する臭気が強くなり、処理施設周辺の環境を悪化させる原因となっている。 Since the moisture contained in the food residue is separated and becomes muddy with the temperature rise here, it becomes poorly breathable and falls into an anaerobic state, falls into an anaerobic state, becomes acidic by turning to lactic acid fermentation, Fermented bacteria are killed. And the odor which generate | occur | produces by this anaerobic fermentation progresses, and becomes the cause of deteriorating the environment around a processing facility.
このように第1発酵時に悪臭が発生することが多いために、施設の周辺に悪臭が洩れないように空気清浄機を設けて多大な付属設備によるコストがかかるのが現状である。また、発酵時の腐敗による悪臭の発生を抑えるために、強制的に空気を供給し、温度を加えたとしても、それは大腸菌などの増殖に好ましい環境となり、目的の有効菌が働いているかどうか確認できない状態で乾燥されることとなり、それを堆肥として使用した場合に悪臭や雑菌の発生により農作物に悪影響を及ぼす問題がある。 As described above, since a bad odor often occurs during the first fermentation, an air purifier is provided so as to prevent the bad odor from leaking around the facility. In addition, even if air is forcibly supplied and temperature is applied in order to suppress the generation of malodor due to decay during fermentation, it will be a favorable environment for the growth of E. coli, etc., and check whether the target effective bacteria are working When it is dried in a state where it cannot be used and it is used as compost, there is a problem of adversely affecting the crops due to the generation of malodors and bacteria.
本発明は、以上の点に鑑みて創案されたものであって、低温域における臭気の発生を抑えた発酵と高温域における発酵との2段階方式により悪臭が発生することなく完全な発酵が行える低臭気な堆肥化処理方法を提供することを目的とするものである。 The present invention was devised in view of the above points, and complete fermentation can be performed without generating bad odor by a two-stage system of fermentation in which generation of odor in a low temperature range is suppressed and fermentation in a high temperature range. The object is to provide a composting method with low odor.
上記の目的を達成するために、本発明に係る低臭気な堆肥化処理方法は、生活ゴミや動植物残滓に、単独もしくは複数の微生物を接種して、増殖させ、発酵、分解させる堆肥化処理方法において、一次処理が、消臭機能を有する微生物により行われる第1次発酵工程と、二次処理が、堆肥化促進機能を有する微生物により第一次発酵工程より高温度で行われる第2次発酵工程を備える工程とする。
ここで、第2次発酵工程は第一次発酵工程より10℃以上高温度で行われることが好ましく、20℃以上高温度で行われることが特に好ましい。10℃以上高温度としたのは、たとえば第1次発酵工程で枯草菌を使用した場合の上限温度と第2次発酵工程で放線菌を使用した場合の下限温度との差が10℃以上あると効果が得やすいからである。
In order to achieve the above object, the low-odor composting method according to the present invention is a composting method in which single or plural microorganisms are inoculated, propagated, fermented, and decomposed to garbage and animal and plant residues. In, the primary fermentation process in which the primary treatment is performed by microorganisms having a deodorizing function, and the secondary fermentation in which the secondary process is performed at a higher temperature than the primary fermentation process by microorganisms having a composting promoting function. The process includes a process.
Here, the secondary fermentation step is preferably performed at a temperature higher by 10 ° C. or higher than the primary fermentation step, and particularly preferably performed at a temperature higher by 20 ° C. or higher. The reason why the temperature is set to 10 ° C or higher is, for example, that the difference between the upper limit temperature when Bacillus subtilis is used in the first fermentation step and the lower limit temperature when actinomycetes are used in the second fermentation step is 10 ° C or more. This is because the effect is easy to obtain.
ここで、生活ゴミや動植物残滓の水分調整を行った後に、枯草菌や放線菌を含む微生物を接種して一次処理において特に30〜60℃の中温域内にて発酵を行うことにより、中温域内での好気的条件下における添加した特に枯草菌の増殖により臭気、例えばアンモニア、カプタン、アミン、油脂成分を分解することにより臭気の発生を抑えながら好気的発酵を継続する。
次に、一次処理において臭気成分の発生が抑えられた中間処理物を、二次処理において第一次発酵工程より高温度、特に70〜85℃の高温域内での好気的条件下における特に放線菌の働きにより発酵をより促進させて短期間での堆肥化を可能とする。
一次処理においては消臭機能を有する微生物、二次処理においては堆肥化促進機能を有する微生物であれば使用できるがいずれも枯草菌または放線菌が好ましく、消臭機能を有する微生物としては枯草菌が特に好ましく、堆肥化促進機能を有する微生物としては放線菌が特に好ましい。また、一次処理において枯草菌と放線菌とを共存させることもできる。枯草菌と放線菌とを共存させ、第一次発酵工程を30〜60℃の中温域内、第2次発酵工程を70〜85℃の高温域内で行うことにより、一次処理においては枯草菌の機能を発揮させ、二次処理においては放線菌の機能を発揮させることができる。
Here, after adjusting the water content of household waste and animal and plant residues, inoculating microorganisms containing Bacillus subtilis and actinomycetes and performing fermentation in the middle temperature range, particularly 30 to 60 ° C., in the middle temperature range, In particular, aerobic fermentation is continued while suppressing the generation of odors by decomposing odors such as ammonia, captan, amine, and oil and fat components by the growth of added Bacillus subtilis under the aerobic conditions.
Next, the intermediate treatment product in which the generation of odorous components is suppressed in the primary treatment is a higher radiation than that in the primary fermentation step in the secondary treatment, particularly under aerobic conditions in a high temperature range of 70 to 85 ° C. Fermentation is further promoted by the function of the fungus and composting in a short period of time is possible.
Any microorganism can be used as long as it has a deodorizing function in the primary treatment and a microorganism having a composting promoting function in the secondary treatment, but both are preferably Bacillus subtilis or actinomycetes, and the microorganism having the deodorizing function is Bacillus subtilis. Actinomycetes are particularly preferable as microorganisms having a composting promoting function. Further, Bacillus subtilis and actinomycetes can coexist in the primary treatment. The function of Bacillus subtilis in the primary treatment by coexisting Bacillus subtilis and actinomycetes, and performing the primary fermentation step in a medium temperature range of 30 to 60 ° C. and the secondary fermentation step in a high temperature range of 70 to 85 ° C. In the secondary treatment, the function of actinomycetes can be exhibited.
なお、前記一次処理において30〜60℃の中温域と限定した理由は、温度が30℃未満では枯草菌の活動が抑制されて充分な消臭効果を得ることができず、また温度が60℃超では枯草菌が熱によって死滅する恐れがあるからである。 The reason why the primary treatment is limited to an intermediate temperature range of 30 to 60 ° C. is that if the temperature is less than 30 ° C., the activity of Bacillus subtilis is suppressed and a sufficient deodorizing effect cannot be obtained, and the temperature is 60 ° C. This is because Bacillus subtilis may be killed by heat at ultra high temperatures.
また、前記二次処理において70〜85℃の高温域と限定した理由は、温度が70℃未満では、放線菌の充分な発酵促進がなされず、温度が85℃を超えると放線菌が熱によって死滅する恐れがあるからである。 The reason why the secondary treatment is limited to a high temperature range of 70 to 85 ° C. is that if the temperature is less than 70 ° C., sufficient fermentation promotion of actinomycetes is not achieved, and if the temperature exceeds 85 ° C., the actinomycetes are heated by heat. Because there is a fear of being killed.
本発明の低臭気な堆肥化処理方法では、一次処理において発生するアンモニア臭を30〜60℃の中温域での枯草菌による臭気成分の分解によって臭気を抑えながら発酵を促進させることができる。したがって、空気清浄機やベンチレーターなどの付帯設備が不要なり、臭気を押さえられた好条件下での作業が可能となる。 In the composting method with low odor according to the present invention, fermentation can be promoted while suppressing the odor of ammonia odor generated in the primary treatment by decomposition of odor components by Bacillus subtilis in an intermediate temperature range of 30 to 60 ° C. Therefore, ancillary equipment such as an air purifier and a ventilator is not required, and work under favorable conditions in which odors are suppressed is possible.
また、二次処理においては、70〜85℃の範囲での高温域での放線菌による発酵・分解により、水分過多を抑制しながら高温状態を維持することにより短期間での堆肥化が可能となる。 Moreover, in the secondary treatment, it is possible to compost in a short period of time by maintaining a high temperature state while suppressing excess water by fermentation and decomposition by actinomycetes in a high temperature range of 70 to 85 ° C. Become.
以下、本発明の実施の形態を図面を参酌しながら説明し、本発明の理解に供する。
図1に、本発明の低臭気な堆肥化処理方法を適用した堆肥化処理場の一例を示す平面見取図を示す。
Hereinafter, embodiments of the present invention will be described with reference to the drawings to provide an understanding of the present invention.
FIG. 1 is a plan view showing an example of a composting treatment plant to which the low-odor composting method of the present invention is applied.
ここで示す堆肥化処理場1は、敷地内に堆積槽2、ワラ堆積倉庫3、攪拌処理槽4、排水槽5および汚水貯留槽6などから構成されるものである。
The composting treatment site 1 shown here is composed of a
この堆積槽2は図2に示すように、その底面に散気管7が配管され食物残滓Aに空気が供給されることにより発酵時の温度調整が行える構成とするとともに、堆積される食物残滓Aは週に1回ホイールローダーなどによって攪拌して発酵の均一化を図れるようにする。
As shown in FIG. 2, the
そこで堆積槽2において生ゴミで代表される食物残滓(含水率75%〜90%)や牛糞、馬糞などの家畜糞にワラ堆積槽倉庫3よりワラやおが屑および戻し堆肥などを投入して含水率55%〜60%の範囲内で水分調整を行うとともに枯草菌および放線菌が含んだ微生物を接種して一次処理を行う。
Therefore, we put food, sawdust and return compost from the straw
次に堆積槽2において2〜3日間の一次発酵を行った後に食物残滓を攪拌処理槽4まで運搬して二次発酵を行う。この攪拌処理槽4には散気管(図示せず。)と撹拌羽根(図示せず。)が設けられ、一次発酵終了後の食物残滓に散気管により空気を供給しながら撹拌羽根によって撹拌されることで好気的発酵条件下での安定した発酵・分解が継続されるとともに食物残滓内の水分の蒸散が行われ、約6週間で完熟した堆肥の生産が行われる。
Next, after performing primary fermentation for 2 to 3 days in the
実施例1
ここで、一日に産出される生ゴミ2t/日と馬糞0.3t/日の合計重量2.3t/日を前記詳述した堆肥化処理場において堆肥化処理を行った。
Example 1
Here, a composting treatment was performed in the composting treatment plant described in detail above with a total weight of 2.3 t / day of raw garbage 2 t / day and horse dung 0.3 t / day produced daily.
一次処理において微生物製剤として枯草菌であるパナエコクリーン(商標登録)/(国際衛生株式会社製)および放線菌であるビオグリーン(商標登録)/(豊栄物産株式会社製)の混合物を原料投入時に混合し、空気の供給によって堆積層内の温度を30〜60℃の範囲内で管理しながら、水分を55〜60%に調整された原料を2〜3日間の中温発酵処理を行った。次に二次処理では、攪拌処理槽内の温度を75〜85℃の範囲内で管理しながら30〜45日間かけて攪拌発酵処理を行った。 In the primary treatment, a mixture of B. subtilis Panaecoclean (registered trademark) / (International hygiene Co., Ltd.) and Actinomycetes biogreen (registered trademark) / (Toyoei Bussan Co., Ltd.) is used as a microbial preparation at the time of raw material input Mixing and controlling the temperature in the sedimentary layer within a range of 30 to 60 ° C. by supplying air, the raw material adjusted to a moisture content of 55 to 60% was subjected to a medium temperature fermentation process for 2 to 3 days. Next, in the secondary treatment, the stirring fermentation treatment was performed for 30 to 45 days while controlling the temperature in the stirring treatment tank within the range of 75 to 85 ° C.
そこで堆積槽位置、攪拌処理槽の投入位置および攪拌処理槽の排出位置におけるアンモニア濃度を従来におけるビオグリーン(商標登録)/(豊栄物産株式会社製)のみの接種により第1次醗酵工程、第2次醗酵工程共に70〜80℃で管理する従来の堆肥化処理と本発明による堆肥化処理との比較測定を行った結果を下記表1に示す。測定単位はppmとする。 Therefore, the first fermentation process and the second fermentation process were conducted by inoculating only the BioGreen (trademark registered) / (Toyoei Bussan Co., Ltd.) with the ammonia concentration at the deposition tank position, the charging position of the stirring tank, and the discharging position of the stirring tank. Table 1 below shows the results of comparative measurement between the conventional composting process managed at 70 to 80 ° C. in both the subsequent fermentation processes and the composting process according to the present invention. The unit of measurement is ppm.
以上の結果から、一次処理における堆積槽での悪臭の原因であるアンモニア濃度が4ppmであり、従来の32ppmに比べて著しく減少し、その後の第2次発酵工程の過程においても、従来法に比べアンモニア濃度が著しく減少した。このアンモニア濃度では殆んどの人が臭気を感じない値である。 From the above results, the ammonia concentration which is the cause of malodor in the sedimentation tank in the primary treatment is 4 ppm, which is significantly reduced compared to the conventional 32 ppm, and in the subsequent secondary fermentation process as compared with the conventional method. The ammonia concentration decreased significantly. At this ammonia concentration, most people do not feel odor.
実施例2
次に、一日に産出される、たまねぎ3.5t/日:えび0.5t/日:あさり0.3t/日:汚泥1t/日の合計重量5.3t/日を前記詳述した堆肥化処理場において堆肥化処理を行った。
Example 2
Next, composting, as described in detail above, with a total weight of 5.3 t / day of onion 3.5 t / day: shrimp 0.5 t / day: clam 0.3 t / day: sludge 1 t / day produced per day Composting was performed at the treatment plant.
一次処理において微生物製剤としてパナエコクリーン(商標登録)/(国際衛生株式会社製)およびビオグリーン(商標登録)/(豊栄物産株式会社製)の混合物を原料投入時に混合し、空気の供給によって堆積槽内の温度を30〜60℃の範囲内にで管理しながら、水分を55〜60%に調整された原料を2〜3日間の中温発酵を行った。次に二次処理では、攪拌処理槽内の温度を75〜85℃の範囲内で管理しながら30〜45日間かけて攪拌発酵処理を行った。 In the primary treatment, a mixture of Pana-Eco Clean (trademark registered) / (made by Kokusai Sanitary Co., Ltd.) and Biogreen (trademark registered) / (made by Toyosei Bussan Co., Ltd.) is mixed at the time of starting the raw material and deposited by supplying air While controlling the temperature in the tank within the range of 30 to 60 ° C., medium temperature fermentation of the raw material whose moisture was adjusted to 55 to 60% was performed for 2 to 3 days. Next, in the secondary treatment, the stirring fermentation treatment was performed for 30 to 45 days while controlling the temperature in the stirring treatment tank within the range of 75 to 85 ° C.
そこで堆積槽位置、攪拌処理槽の投入位置および攪拌処理槽の排出位置におけるアンモニア濃度を、ビオグリーン(商標登録)/(豊栄物産株式会社製)のみの接種により第1次醗酵工程、第2次醗酵工程共に70〜80℃で管理する従来の堆肥化処理従と本発明による堆肥化処理との比較測定を行った結果を下記表2に示す。測定単位はppmとする。 Therefore, the primary fermentation process and the secondary fermentation were conducted by inoculating only the Biogreen (trademark registered) / (manufactured by Toyoe Bussan Co., Ltd.) with the ammonia concentration at the deposition tank position, the charging position of the stirring tank, and the discharging position of the stirring tank. Table 2 below shows the results of comparative measurement between the conventional composting process and the composting process according to the present invention, both of which are controlled at 70 to 80 ° C. in the fermentation process. The unit of measurement is ppm.
以上の結果から、一次処理における堆積槽での悪臭の原因であるアンモニア濃度が1ppmであり、従来の40ppmに比べて著しく減少し、その後の第2次発酵工程の過程においても、従来法に比べアンモニア濃度が著しく減少した。 From the above results, the ammonia concentration which is the cause of malodor in the sedimentation tank in the primary treatment is 1 ppm, which is significantly reduced compared to the conventional 40 ppm, and in the subsequent secondary fermentation process as compared with the conventional method. The ammonia concentration decreased significantly.
以上のように一次発酵時において、枯草菌および放線菌が含んだ微生物を接種することにより、30〜60℃の中温域内を至適とする枯草菌は、悪臭の原因となるアンモニア、カプタン、アミン、油脂成分を分解することにより臭気の発生を抑えながら発酵を促進する。これにより、最も悪臭が発生する一次発酵時の低臭気を可能とする。 As described above, inoculation with microorganisms contained in Bacillus subtilis and actinomycetes at the time of primary fermentation, Bacillus subtilis that is optimal in the middle temperature range of 30 to 60 ° C. is caused by ammonia, captan, amine that causes malodor By decomposing oil and fat components, fermentation is promoted while suppressing the generation of odor. Thereby, the low odor at the time of the primary fermentation which produces the most bad odor is enabled.
次に、攪拌処理槽内にて二次発酵を行う場合には、75〜85℃の高温域内を至適とする放線菌は、高温状態を継続した状態での発酵・分解を促進することにより、その結果水分の蒸散を効率よく行うことができ、好気性発酵条件下での発酵を完了することにより完熟度の高い堆肥を生産することができる。 Next, when secondary fermentation is performed in a stirring treatment tank, actinomycetes that are optimal in a high temperature range of 75 to 85 ° C. promote fermentation and decomposition in a state where the high temperature state is continued. As a result, the transpiration of water can be efficiently performed, and compost having a high degree of maturity can be produced by completing the fermentation under aerobic fermentation conditions.
1 堆肥化処理場
2 堆積槽
3 ワラ堆積倉庫
4 攪拌処理槽
5 排水槽
6 汚水貯留槽
7 散気管
DESCRIPTION OF SYMBOLS 1
Claims (1)
堆積槽において生活ゴミや動植物残滓にワラ、おが屑及び戻し堆肥を投入して含水率55%〜60%の範囲内で水分調整を行うと共に、枯草菌及び放線菌を含んだ微生物を接種して30〜60℃の範囲内で2〜3日間発酵処理を行う第1次発酵工程と、
該第1次発酵工程の後に、撹拌処理槽において75〜85℃の範囲内で30〜45日間撹拌発酵処理を行う第2次発酵工程を備える
ことを特徴とする低臭気な堆肥化処理方法。 In a composting method that inoculates living garbage and animal and plant residues with one or more microorganisms, grows, ferments and decomposes,
In the sedimentation tank, we put straw, sawdust and return compost into domestic waste and animal and plant residues to adjust the water content within the range of 55% to 60% and inoculate with microorganisms containing Bacillus subtilis and actinomycetes. A primary fermentation step of performing a fermentation process within a range of ˜60 ° C. for 2-3 days;
A low odor composting method comprising a secondary fermentation step of performing a stirring fermentation treatment within a range of 75 to 85 ° C for 30 to 45 days in the stirring treatment tank after the primary fermentation step .
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