JP2002102900A - Organic waste preserving method - Google Patents
Organic waste preserving methodInfo
- Publication number
- JP2002102900A JP2002102900A JP2000295558A JP2000295558A JP2002102900A JP 2002102900 A JP2002102900 A JP 2002102900A JP 2000295558 A JP2000295558 A JP 2000295558A JP 2000295558 A JP2000295558 A JP 2000295558A JP 2002102900 A JP2002102900 A JP 2002102900A
- Authority
- JP
- Japan
- Prior art keywords
- organic waste
- closed container
- water
- residue
- reduced
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Drying Of Solid Materials (AREA)
- Treatment Of Sludge (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、下水処理で発生す
る有機性廃棄物の保存方法に関し、特に、有機性廃棄物
に含まれる水分を真空蒸発させることにより、有機性廃
棄物の温度と含水率を低下させ、これにより貯留する有
機性廃棄物からの臭気の発生を抑制し、下水処理場での
作業環境の改善と処理コストの低減とを図ることができ
る有機性廃棄物の保存方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preserving organic waste generated in sewage treatment, and more particularly to a method for evaporating water contained in organic waste in a vacuum so as to reduce the temperature and water content of the organic waste. A storage method for organic waste that can reduce the rate of odors from stored organic waste, thereby improving the working environment and reducing the cost of treatment at sewage treatment plants. Things.
【０００２】[0002]
【従来の技術】下水処理で発生するし渣や汚砂、汚泥等
の有機性廃棄物には臭気があり、また長時間放置した場
合は、腐敗や発酵によりその臭気は加速度的に強くなる
傾向がある。下水処理場では、通常、これらの有機性廃
棄物は、図３に示すように、除塵機１によって汚水Ｗか
ら分離され、脱水機１１で脱水された後、ホッパー１２
にて貯留される。2. Description of the Related Art Organic wastes such as sewage, sand and sludge generated in sewage treatment have an odor, and when left for a long time, the odor tends to increase at an accelerated rate due to decay or fermentation. There is. In a sewage treatment plant, these organic wastes are usually separated from sewage W by a dust remover 1 and dewatered by a dehydrator 11 as shown in FIG.
Stored at
【０００３】この場合、貯留した有機性廃棄物から発生
する臭気対策として脱臭装置（図示省略）を設けている
が、小規模処理場や中継ポンプ場では運転管理者が不足
し、安全な臭気対策ができていない場合が多い。さら
に、このような小規模な処理場等では、脱水機１１がな
い場合も多く、また、し渣量が少ないことから、有機性
廃棄物の搬出頻度も週１回又は月１回の場合が多い。そ
の結果、有機性廃棄物の貯留時に腐敗や発酵により臭気
が発生し、作業環境や周辺環境が悪化することから、小
規模な処理場等でも別途脱臭装置が必要になることが多
い。[0003] In this case, a deodorizing device (not shown) is provided as a countermeasure against odor generated from the stored organic waste. Often not done. Furthermore, in such a small-scale treatment plant, there are many cases where the dehydrator 11 is not provided, and since the amount of residue is small, the frequency of carrying out the organic waste may be once a week or once a month. Many. As a result, odor is generated due to decay or fermentation during storage of the organic waste, and the working environment and the surrounding environment are deteriorated. Therefore, a separate deodorizing device is often required even in a small-scale treatment plant.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、上記従来の
有機性廃棄物の保存方法が有する問題点に鑑み、貯留す
る有機性廃棄物からの臭気の発生を抑制し、下水処理場
での作業環境の改善と処理コストの低減とを図ることが
できる有機性廃棄物の保存方法を提供することを目的と
する。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the conventional organic waste preservation method, and suppresses the generation of odors from the stored organic waste. An object of the present invention is to provide a method for preserving organic waste, which can improve the working environment and reduce the processing cost.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するた
め、本発明の有機性廃棄物の保存方法は、有機性廃棄物
を密閉容器内に収容して、密閉容器内を略真空状態に減
圧し、有機性廃棄物に含まれる水分を蒸発させることに
より、有機性廃棄物の温度を低下させることを特徴とす
る。In order to achieve the above object, an organic waste preservation method according to the present invention comprises storing an organic waste in a closed container, and reducing the pressure in the closed container to a substantially vacuum state. The temperature of the organic waste is reduced by evaporating water contained in the organic waste.
【０００６】この有機性廃棄物の保存方法は、有機性廃
棄物を収容した密閉容器内を略真空状態に減圧し、有機
性廃棄物に含まれる水分を蒸発させることから、有機性
廃棄物の温度と含水率を低下させることができ、これに
より貯留する有機性廃棄物からの臭気の発生を抑制し
て、作業環境の改善を図るとともに、脱臭装置を不要と
して、下水処理場の処理コストの低減を図ることができ
る。[0006] In this method of storing organic waste, the pressure in the closed container containing the organic waste is reduced to a substantially vacuum state, and the water contained in the organic waste is evaporated. The temperature and water content can be reduced, thereby suppressing the generation of odors from the stored organic waste, improving the work environment, and eliminating the need for deodorizing equipment, reducing the cost of treating sewage treatment plants. Reduction can be achieved.
【０００７】この場合において、密閉容器内を０．６ｋ
Ｐａ以下に減圧し、有機性廃棄物に含まれる水分を凍結
することができる。In this case, the inside of the closed container is 0.6 k
By reducing the pressure to Pa or less, the water contained in the organic waste can be frozen.
【０００８】これにより、有機性廃棄物の腐敗の進行を
防止し、臭気の発生をさらに抑制することができる。[0008] Accordingly, it is possible to prevent the decay of the organic waste and to further suppress the generation of odor.
【０００９】また、凍結後も減圧を継続して、凍結した
水分を昇華させることができる。Further, the decompression can be continued even after the freezing, and the frozen water can be sublimated.
【００１０】これにより、廃棄物の含水率をさらに減少
させることができる。[0010] This makes it possible to further reduce the water content of the waste.
【００１１】[0011]
【発明の実施の形態】以下、本発明の有機性廃棄物の保
存方法の実施の形態を図面に基づいて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the method for storing organic waste according to the present invention will be described below with reference to the drawings.
【００１２】図１に、本発明の有機性廃棄物の保存方法
の第１実施例を示す。本実施例の下水処理においては、
除塵機１によって汚水Ｗから分離したし渣Ｓを、投入ゲ
ート２から減圧ホッパー３内に投入する。そして、減圧
ホッパー３内をバキュームポンプ４により略真空状態に
減圧し、し渣Ｓに含まれる水分を蒸発させることによ
り、し渣Ｓの温度を低下させる。すなわち、バキューム
ポンプ４で減圧ホッパー３内を吸気すれば水分は常温で
も沸騰し、このときの気化熱によってし渣Ｓ等の処理物
の温度は低下する。FIG. 1 shows a first embodiment of the method for storing organic waste according to the present invention. In the sewage treatment of the present embodiment,
The residue S separated from the wastewater W by the dust remover 1 is put into the decompression hopper 3 through the input gate 2. Then, the pressure inside the decompression hopper 3 is reduced to a substantially vacuum state by the vacuum pump 4 to evaporate water contained in the residue S, thereby lowering the temperature of the residue S. That is, if the inside of the decompression hopper 3 is suctioned by the vacuum pump 4, the water will boil even at room temperature, and the temperature of the processed material such as the residue S will be reduced by the heat of vaporization at this time.
【００１３】この場合、減圧ホッパー３内の圧力を、０
℃での水の飽和蒸気圧である０．６ｋＰａ以下の高真空
下に減圧し、し渣Ｓを凍結することにより、し渣Ｓは内
部まで０℃になり腐敗の進行が防止されるとともに、含
水率が減少する。In this case, the pressure in the decompression hopper 3 is set to 0
By reducing the pressure under a high vacuum of 0.6 kPa or less, which is the saturated vapor pressure of water at 0 ° C., and freezing the residue S, the residue S becomes 0 ° C. to the inside, thereby preventing the progress of decay, The moisture content decreases.
【００１４】また、凍結後もこの高真空下の減圧を継続
すると、凍結した水分が昇華し、し渣Ｓの含水率をさら
に減少させることができる。この場合、バキュームポン
プ４で減圧ホッパー３内部を０．６ｋＰａに維持するた
めには、蒸発する水（水蒸気）を空気と共に排気する必
要がある。このとき、水蒸気と共に臭気性分も排出され
るが、この臭気性分は常圧下では処理物中の水に溶解し
ていたものが大部分であるため、散気装置５によって再
度汚水Ｗに溶解させることにより、大気中への飛散を容
易に防止することができる。なお、腐敗により有機物が
分解し、臭気性分が生成される量は少なくなっているた
め、し渣Ｓから排出される臭気性分の量は少なくなって
いる。If the decompression under the high vacuum is continued even after the freezing, the frozen water sublimes, and the water content of the residue S can be further reduced. In this case, in order to maintain the inside of the decompression hopper 3 at 0.6 kPa with the vacuum pump 4, it is necessary to exhaust water (steam) to be evaporated together with air. At this time, odorous components are also discharged together with the water vapor, but most of the odorous components dissolved in the water in the treated material under the normal pressure. By doing so, scattering into the atmosphere can be easily prevented. In addition, since the amount of organic substances decomposed by decay and the generation of odorous components is reduced, the amount of odorous components discharged from the residue S is reduced.
【００１５】図２に、本発明の有機性廃棄物の保存方法
の第２実施例を示す。なお、この第２実施例は、第１実
施例を基本として構成しているため、同一部材は同一符
号を記すことにより、詳しい説明は省略する。FIG. 2 shows a second embodiment of the method for storing organic waste according to the present invention. Since the second embodiment is based on the first embodiment, the same members are denoted by the same reference numerals, and the detailed description is omitted.
【００１６】減圧ホッパー３内部を０．６ｋＰａ以下の
高真空下にすると、し渣Ｓ等の水分は凍結して水蒸気と
して昇華し、バキュームポンプ４を介して散気装置５か
ら汚水Ｗ中に排出される。この際、排気中の水蒸気を、
バキュームポンプ４の上流側に設置した水分除去用冷凍
機６で更に冷却し、再度凍結させることにより、バキュ
ームポンプ４の排気量や運転の度合いを小さくすること
ができ、省エネ運転を実施することができる。水分除去
用冷凍機６を設置した場合と、設置していない場合との
比較を下記の表１に示す。When the inside of the decompression hopper 3 is set to a high vacuum of 0.6 kPa or less, the water of the residue S is frozen and sublimated as water vapor, and discharged into the sewage W from the diffuser 5 through the vacuum pump 4. Is done. At this time, the steam in the exhaust is
By further cooling and re-freezing with the moisture removing refrigerator 6 installed on the upstream side of the vacuum pump 4, the displacement of the vacuum pump 4 and the degree of operation can be reduced, and energy saving operation can be performed. it can. Table 1 below shows a comparison between the case where the water removal refrigerator 6 is installed and the case where it is not installed.
【００１７】[0017]
【表１】 [Table 1]
【００１８】なお、水分除去用冷凍機６で凍結した水分
は、投入ゲート２や排出ゲート７を開けたときに、外気
と接することにより溶けて汚水Ｗ中に排出される。The moisture frozen by the moisture removing refrigerator 6 is melted by being brought into contact with the outside air and discharged into the sewage W when the input gate 2 and the discharge gate 7 are opened.
【００１９】また、この第２実施例では、減圧ホッパー
３内で乾燥処理が実施されているときに、投入ゲート２
の上でし渣Ｓ等を一時貯留できる一時貯留シュート８を
設けている。そして、減圧ホッパー３内に、し渣Ｓ等を
撹拌して乾燥を促進させる攪拌機９を設けるとともに、
減圧ホッパー３の下に結露した水分を排出ゲート７に導
く結露受皿１０を設置している。In the second embodiment, when the drying process is performed in the decompression hopper 3, the input gate 2
There is provided a temporary storage chute 8 for temporarily storing the residue S or the like. A stirrer 9 is provided in the decompression hopper 3 to stir the residue S and the like to promote drying.
A dew tray 10 is provided below the decompression hopper 3 to guide dew condensation to the discharge gate 7.
【００２０】以上、本発明の実施例をし渣を中心に説明
したが、本発明の有機性廃棄物の保存方法は、汚砂や汚
泥等の有機性廃棄物に適用しても効果的である。Although the embodiments of the present invention have been described above mainly with respect to the residue, the method for storing organic waste according to the present invention is effective even when applied to organic waste such as sand and sludge. is there.
【００２１】[0021]
【発明の効果】本発明の有機性廃棄物の保存方法によれ
ば、有機性廃棄物を収容した密閉容器内を略真空状態に
減圧し、有機性廃棄物に含まれる水分を蒸発させること
から、有機性廃棄物の温度と含水率を減少させることが
でき、これにより貯留する有機性廃棄物からの臭気の発
生を抑制して、作業環境の改善を図るとともに、脱臭装
置を不要として、下水処理場の処理コストの低減を図る
ことができる。According to the method for storing organic waste of the present invention, the pressure in the closed container containing the organic waste is reduced to a substantially vacuum state, and the moisture contained in the organic waste is evaporated. In addition, the temperature and water content of organic waste can be reduced, thereby suppressing the generation of odors from the stored organic waste, improving the working environment, and eliminating the need for a deodorizing device to reduce wastewater. The processing cost of the processing plant can be reduced.
【００２２】また、密閉容器内を０．６ｋＰａ以下に減
圧し、有機性廃棄物に含まれる水分を凍結することによ
り、有機性廃棄物の腐敗の進行を防止し、臭気の発生を
さらに抑制することができる。Further, by reducing the pressure in the closed container to 0.6 kPa or less and freezing the water contained in the organic waste, the decay of the organic waste is prevented from progressing, and the generation of odor is further suppressed. be able to.
【００２３】さらに、凍結後も減圧を継続して、凍結し
た水分を昇華させることにより、廃棄物の含水率をさら
に減少させることができる。Furthermore, by continuing the decompression even after freezing and sublimating the frozen water, the water content of the waste can be further reduced.
【図１】本発明の有機性廃棄物の保存方法の第１実施例
を示す正面図である。FIG. 1 is a front view showing a first embodiment of a method for storing organic waste according to the present invention.
【図２】本発明の有機性廃棄物の保存方法の第２実施例
を示す正面図である。FIG. 2 is a front view showing a second embodiment of the method for storing organic waste according to the present invention.
【図３】従来の有機性廃棄物の保存方法を示す正面図で
ある。FIG. 3 is a front view showing a conventional method for storing organic waste.
１ 除塵機 ２ 投入ゲート ３ 減圧ホッパー（密閉容器） ４ バキュームポンプ ５ 散気装置 ６ 水分除去用冷凍機 ７ 排出ゲート ８ 一時貯留シュート ９ 攪拌機 １０ 結露受皿 Ｓ し渣 Ｗ 汚水 DESCRIPTION OF SYMBOLS 1 Dust remover 2 Input gate 3 Decompression hopper (closed container) 4 Vacuum pump 5 Air diffuser 6 Moisture removal refrigerator 7 Discharge gate 8 Temporary storage chute 9 Stirrer 10 Dew tray S S residue W Waste water
───────────────────────────────────────────────────── フロントページの続き (72)発明者 塩谷 政晃 兵庫県尼崎市下坂部３丁目11番１号 日立 機電工業株式会社内 (72)発明者 大木 智博 兵庫県尼崎市下坂部３丁目11番１号 日立 機電工業株式会社内 (72)発明者 池田 徹 兵庫県尼崎市下坂部３丁目11番１号 日立 機電工業株式会社内 Ｆターム(参考） 3L113 AC23 AC67 BA39 DA26 4D059 AA03 BD19 BD40 BF01 CA16 EB20 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaaki Shioya 3-1-1, Shimosakabe, Amagasaki-shi, Hyogo Prefecture Inside Hitachi Kiden Kogyo Co., Ltd. (72) Tomohiro Oki 3--11, Shimosakabe, Amagasaki-shi, Hyogo No. 1 Inside Hitachi Kiden Kogyo Co., Ltd. (72) Inventor Tohru Ikeda 3-1-1 Shimosakabe, Amagasaki-shi, Hyogo F-term inside Hitachi Kiden Kogyo Co., Ltd. 3L113 AC23 AC67 BA39 DA26 4D059 AA03 BD19 BD40 BF01 CA16 EB20
Claims (3)
密閉容器内を略真空状態に減圧し、有機性廃棄物に含ま
れる水分を蒸発させることにより、有機性廃棄物の温度
を低下させることを特徴とする有機性廃棄物の保存方
法。1. An organic waste is contained in a closed container,
A method for storing organic waste, comprising reducing the temperature of the organic waste by reducing the pressure in the closed container to a substantially vacuum state and evaporating water contained in the organic waste.
し、有機性廃棄物に含まれる水分を凍結することを特徴
とする請求項１記載の有機性廃棄物の保存方法。2. The method for preserving organic waste according to claim 1, wherein the pressure inside the closed container is reduced to 0.6 kPa or less, and moisture contained in the organic waste is frozen.
を昇華させることを特徴とする請求項１又は２記載の有
機性廃棄物の保存方法。3. The method for preserving organic waste according to claim 1, wherein the decompression is continued even after freezing to sublimate the frozen water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000295558A JP2002102900A (en) | 2000-09-28 | 2000-09-28 | Organic waste preserving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000295558A JP2002102900A (en) | 2000-09-28 | 2000-09-28 | Organic waste preserving method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002102900A true JP2002102900A (en) | 2002-04-09 |
Family
ID=18777968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000295558A Pending JP2002102900A (en) | 2000-09-28 | 2000-09-28 | Organic waste preserving method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002102900A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979020A (en) * | 2021-02-24 | 2021-06-18 | 安徽同方工程咨询有限公司 | Hydraulic engineering sludge wastewater treatment device and process |
-
2000
- 2000-09-28 JP JP2000295558A patent/JP2002102900A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979020A (en) * | 2021-02-24 | 2021-06-18 | 安徽同方工程咨询有限公司 | Hydraulic engineering sludge wastewater treatment device and process |
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