JP2942884B2 - Method and apparatus for removing sand from night soil and septic tank sludge - Google Patents
Method and apparatus for removing sand from night soil and septic tank sludgeInfo
- Publication number
- JP2942884B2 JP2942884B2 JP7346222A JP34622295A JP2942884B2 JP 2942884 B2 JP2942884 B2 JP 2942884B2 JP 7346222 A JP7346222 A JP 7346222A JP 34622295 A JP34622295 A JP 34622295A JP 2942884 B2 JP2942884 B2 JP 2942884B2
- Authority
- JP
- Japan
- Prior art keywords
- sand
- fine sand
- dehydrator
- gravity
- septic tank
- 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.)
- Expired - Fee Related
Links
Landscapes
- Treatment Of Sludge (AREA)
- Filtration Of Liquid (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、し尿や浄化槽汚泥
を生物学的方法で処理する工程の前処理工程において砂
を除去する方法及び装置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 and an apparatus for removing sand in a pretreatment step of a step of treating human waste or septic tank by a biological method.
【０００２】[0002]
【従来の技術】地域の処理場に集めたし尿や浄化槽汚泥
は、夾雑物・砂を除去する前処理工程を経た後に生物学
的処理をしてから放流する。生物学的処理を安定した状
態で継続するには、原液中に含まれる砂や夾雑物をあら
かじめ除去する前処理を十分に行うことが重要である。
すなわち、集めたし尿・浄化槽汚泥はまず沈砂槽に投入
し、砂を沈降分離する。つぎに、ロータリースクリーン
などの夾雑物除去装置で、紙・布・プラスチックフィル
ムなどを除去する。沈砂槽で沈降した砂は真空ポンプで
吸引して除砂タンクへ送り、水洗した後に焼却したり埋
立てに利用したりする。夾雑物除去装置で除去した夾雑
物も、スクリュープレスなどの加圧脱水機で脱水し洗浄
した後に同様の最終処理をする。2. Description of the Related Art Night soil and septic tank sludge collected at a local treatment plant are subjected to a biological treatment after passing through a pretreatment step for removing impurities and sand, and then discharged. In order to continue the biological treatment in a stable state, it is important to sufficiently perform a pretreatment for removing sand and foreign substances contained in the stock solution in advance.
That is, the collected human waste and septic tank sludge is first put into a sand settling tank, and the sand is settled and separated. Next, paper, cloth, plastic film, and the like are removed by a contaminant removal device such as a rotary screen. The sand settled in the sand settling tank is suctioned by a vacuum pump and sent to a sand removal tank, washed with water and then incinerated or used for landfill. The contaminants removed by the contaminant removal device are also subjected to the same final treatment after being dehydrated and washed with a pressure dehydrator such as a screw press.
【０００３】し尿・浄化槽汚泥の受入れは、通常は昼間
だけである。このため、前処理工程は昼間だけの断続運
転となる。ところが、生物学的処理は、当然に昼夜に渡
る連続運転になる。そこで、これまでは砂・夾雑物を除
去した原液はいったん貯溜槽に蓄え、貯溜槽から連続的
に生物学的処理装置へ送り込んで生物学的処理をしてい
た。[0003] Human waste and septic tank sludge are usually received only during the daytime. For this reason, the pretreatment process is an intermittent operation only in the daytime. However, biological treatment is naturally a continuous operation day and night. Until now, the stock solution from which sand and contaminants have been removed has been once stored in a storage tank, and continuously sent from the storage tank to a biological treatment device for biological treatment.
【０００４】ところで、沈砂槽は単にせきを設けたに過
ぎないごく単純な構造のものである。原液を流し込んだ
とき、同量の原液がせきからあふれ出す仕組みである。
比較的大きな砂はせきに阻まれても、細かい砂は乗り越
えて貯溜槽へ送られ、貯溜槽内で沈降し堆積する。この
ため、貯溜槽内に堆積した堆積物を定期的に取り出す作
業が必要になった。[0004] The sand settling tank has a very simple structure in which only a cough is provided. When the undiluted solution is poured, the same amount of undiluted solution overflows from the cough.
Even if relatively large sand is blocked by coughs, fine sand gets over and is sent to the storage tank, where it sinks and accumulates. Therefore, it is necessary to periodically remove the deposits accumulated in the storage tank.
【０００５】この問題を解決するため、例えば特開平２
−２３７６９０号公報に記載されたものが開発された。
このものにおいては、遠心分離により砂を除いた後に貯
溜槽へ送り込んでいる。また、特開平２−２３７６５８
号公報には、液体サイクロンと遠心分離機又は液体サイ
クロンとベルトプレス型脱水機で砂を除去した後に貯溜
槽へ送るものが記載されている。To solve this problem, for example, Japanese Patent Laid-Open No.
No. 237690 was developed.
In this method, sand is removed by centrifugation and then sent to a storage tank. Also, JP-A-2-237658.
In Japanese Patent Application Laid-Open Publication No. H10-157, there is described a method in which sand is removed by a liquid cyclone and a centrifuge or a liquid cyclone and a belt press type dehydrator and then sent to a storage tank.
【０００６】[0006]
【発明が解決しようとする課題】遠心分離機・ベルトプ
レス型脱水機は極めて高価であり、運転には大きな電力
も必要とする。遠心分離機又はベルトプレス型脱水機の
単独で処理物の全量を処理することは非常に不経済であ
る。The centrifugal separator / belt press type dehydrator is extremely expensive and requires a large amount of electric power to operate. It is very uneconomical to treat the entire amount of the processed material by a centrifuge or a belt press type dewatering machine alone.
【０００７】液体サイクロンと遠心分離機・ベルトプレ
ス型脱水機とを組み合わせたものにおいては、液体サイ
クロンで固形分を濃縮した後に遠心分離機・ベルトプレ
ス型脱水機で処理する。単独で処理するのと比べ、遠心
分離機・ベルトプレス型脱水機での処理量が少なくなる
といった利点がある。In a combination of a liquid cyclone and a centrifugal separator / belt press dehydrator, the solid content is concentrated by the liquid cyclone and then processed by a centrifugal separator / belt press dehydrator. There is an advantage that the processing amount in the centrifugal separator / belt press type dehydrator is reduced as compared with the case where the treatment is performed alone.
【０００８】しかし、遠心分離機は高速回転をする機械
であることから、断続的な運転には不向きである。ま
た、内部が砂によって摩耗するため頻繁に部品交換をし
なければならず、維持管理が大変である。騒音も激し
い。ベルトプレス型脱水機も、構造が複雑で高価であ
る。連転費用も高くつく。However, since the centrifuge is a machine that rotates at high speed, it is not suitable for intermittent operation. In addition, since the inside is worn by sand, frequent replacement of parts is required, and maintenance is difficult. The noise is also intense. The belt press type dehydrator also has a complicated structure and is expensive. Rotation costs are also expensive.
【０００９】本発明が解決しようとする課題は、設備が
安価で運転費用も安くつき、効率的な砂除去もできる砂
除去方法及び装置を提供する点にある。The problem to be solved by the present invention is to provide a method and an apparatus for removing sand, which are inexpensive, have low operating costs, and can remove sand efficiently.
【００１０】[0010]
【課題を解決するための手段】本発明に係るものにおい
ては、運転が昼間だけの前処理工程において除去性能に
優れた液体サイクロンで砂をできるだけ完全に分離した
後に、脱水性能に優れた重力式脱水機に送って脱水する
ようにしている。重力式脱水機では、夜間の運転停止中
も捕捉した砂をそのまま放置して脱水を進行させる。翌
日は脱水細砂を取り除いた後に、運転を再開する。すな
わち、運転停止中の時間も有効活用することで、安価で
運転費用も安い液体サイクロン・重力式脱水機の組合せ
利用を可能にしたのである。これにより、経済的かつ効
率的な砂除去を実現できる。According to the present invention, the sand is separated as completely as possible with a hydrocyclone having excellent removal performance in a pretreatment step only in the daytime, and then the gravity type is provided with excellent dehydration performance. They are sent to a dehydrator to dehydrate. In a gravity dehydrator, dewatering proceeds while leaving the trapped sand as it is during nighttime operation stoppage. The next day, after removing the dehydrated fine sand, the operation is restarted. That is, by effectively utilizing the time during which the operation is stopped, it is possible to use a combination of a liquid cyclone and a gravity dehydrator which is inexpensive and inexpensive to operate. Thereby, economical and efficient sand removal can be realized.
【００１１】[0011]
【発明の実施の形態】砂除去装置としては、設備・運転
の費用が安価であって安定した運転が容易にできるもの
が望ましい。処理性能としては次の２点が要求される。 原液に含まれる砂をできるだけ完全に除去すること
（除去性能） 除去した砂に含まれる水分をできるだけ少なくする
こと（脱水性能）BEST MODE FOR CARRYING OUT THE INVENTION It is desirable that a sand removing apparatus is inexpensive in equipment and operation and can easily perform stable operation. The following two points are required as processing performance. Removing the sand contained in the undiluted solution as completely as possible (removal performance) Reducing the moisture contained in the removed sand as much as possible (dehydration performance)
【００１２】細砂は比重が大きいため、液体サイクロン
で十分な除去性能が得られる。液体サイクロンは構造が
簡単である。原液を定量ボンプなどで供給するだけだか
ら、運転も簡単である。しかし、脱水能力がないため、
脱水性能に優れた機器を併用するしかない。脱水性能に
優れた遠心分離機を併用したいところだが、遠心分離機
には前記のような欠点がある。Since fine sand has a large specific gravity, sufficient removal performance can be obtained with a hydrocyclone. Hydrocyclones are simple in construction. The operation is simple because the undiluted solution is simply supplied with a fixed amount pump. However, because there is no dehydration ability,
The only option is to use equipment with excellent dehydration performance. Although it is desired to use a centrifugal separator having excellent dehydration performance, the centrifugal separator has the above-mentioned disadvantages.
【００１３】本発明の発明者は、前処理工程の運転が昼
間だけの断続運転である点に着目した。そして、除去性
能に優れた液体サイクロンと脱水性能に優れた重力式脱
水機とを組み合わせたらどうかと考えた。その発想に基
づいた実験を重ねた結果、非常に簡単な装置で容易に目
的を達成できることを確認でき、本発明を完成させるこ
とができた。The inventor of the present invention has noticed that the operation of the pretreatment step is an intermittent operation only in the daytime. Then, it was wondered if a hydrocyclone having excellent removal performance was combined with a gravity dehydrator having excellent dehydration performance. As a result of repeated experiments based on the idea, it was confirmed that the object could be easily achieved with a very simple device, and the present invention could be completed.
【００１４】本発明に係るし尿及び浄化槽汚泥中の砂除
去方法は次のようなものである。すなわち、し尿や浄化
槽汚泥を生物学的方法で処理する工程の前処理工程にお
いて、夾雑物を除去した原液を液体サイクロンに入れて
分離作業をした後に液体サイクロンの下部から流出する
細砂を含む濃縮液を重力式脱水機へ送り込んで重力式脱
水機で細砂を除去する工程を設け、前記の生物学的方法
で処理する工程は全日の連続運転とするが前処理工程は
昼間だけの断続運転とし、重力式脱水機においては運転
停止後は細砂を捕捉した状態のまま翌日まで放置して細
砂の脱水を進行させ、翌日は重力式脱水機の脱水細砂を
取り除いてから前処理工程の運転を再開することを特徴
とするものである。The method for removing sand from night soil and septic tank sludge according to the present invention is as follows. In other words, in the pretreatment step of the step of treating human waste and septic tank sludge by a biological method, the concentrate containing fine sand flowing out from the lower part of the liquid cyclone after separating the undiluted liquid into the liquid cyclone and performing separation work. A step of feeding the liquid to a gravity dehydrator and removing fine sand by a gravity dehydrator is provided, and the step of treating by the biological method is a continuous operation all day, but the pretreatment step is an intermittent operation only in the daytime. In the gravity dehydrator, after the operation is stopped, the fine sand is dewatered by leaving the fine sand trapped until the next day with the fine sand captured.The next day, the dewatered fine sand of the gravity dehydrator is removed, and then the pretreatment process is performed. Is restarted.
【００１５】本発明に係るし尿及び浄化槽汚泥中の砂除
去装置は次のようなものである。すなわち、し尿や浄化
槽汚泥を生物学的方法で処理する工程の前処理工程にお
いて使用するものであって、夾雑物を除去した原液を液
体サイクロンへ送る定量ポンプ又は流量制御装置を備え
たポンプと、そのポンプにより送り込まれた原液を分離
処理する液体サイクロンと、及びその液体サイクロンの
下部から流出する細砂を含む濃縮液を受け入れて脱水処
理をする重力式脱水機とを備えたものである。An apparatus for removing sand from human waste and sludge from a septic tank according to the present invention is as follows. That is, a pump equipped with a quantitative pump or a flow rate control device that is used in a pretreatment step of a step of treating human waste and septic tank sludge by a biological method, and sends a stock solution from which contaminants have been removed to a liquid cyclone, It comprises a liquid cyclone for separating the stock solution fed by the pump, and a gravity type dehydrator for receiving a concentrated liquid containing fine sand flowing out from the lower part of the liquid cyclone and performing a dehydrating process.
【００１６】そして、この重力式脱水機は、縦型容器状
とした本体の内部に、下方へ行くほど断面積が次第に小
さくなる部分を備えたろ板を設けてろ板により本体内を
内側部分と外側部分とに区画し、ろ板の内側部分の上方
に濃縮液流入口を設けて外側部分にろ液排出口を設け、
ろ板の内側部分下方には洗浄液排出口と排出弁を備えた
固形物排出口とを設け、本体内の中央に洗浄管を垂直に
設けたものとした。The gravity type dehydrator is provided with a filter plate provided with a portion having a gradually decreasing cross-sectional area as it goes downward in a vertical container-shaped body. A concentrated liquid inlet above the inner part of the filter plate and a filtrate outlet on the outer part,
A washing liquid discharge port and a solid substance discharge port provided with a discharge valve were provided below the inner part of the filter plate, and a cleaning pipe was provided vertically in the center of the main body.
【００１７】つぎに、本発明の実施の形態を示す。ま
ず、砂除去システムについて全体設備の概要を図１に基
づいて説明する。原液は沈砂槽１に送り込む。大きい砂
は沈降し、残りはせきを越えて隣の受入槽２へ流入す
る。沈砂槽１の底に沈降した砂は真空ポンプ１４で除砂
タンク１３へ送り、やがては埋立処分にする。受入槽２
内の原液は破砕ポンプ３により夾雑物除去装置４へ送
る。夾雑物除去装置４で分離した夾雑物は加圧脱水機５
へ移す。加圧脱水機５で脱水した後の固形分は焼却し、
液状分は受入槽２へ戻す。他方、夾雑物除去装置４で夾
雑物を取り除かれた残りの原液は中継槽６へ送って溜め
ておく。Next, an embodiment of the present invention will be described. First, an outline of the entire facility of the sand removal system will be described based on FIG. The stock solution is sent to the settling tank 1. The large sand settles, and the rest flows over the weir into the adjacent receiving tank 2. The sand that has settled at the bottom of the sand settling tank 1 is sent to a sand removal tank 13 by a vacuum pump 14 and eventually landfilled. Receiving tank 2
The undiluted solution is sent to the impurity removing device 4 by the crushing pump 3. The contaminants separated by the contaminant removal device 4 are subjected to a pressure dehydrator 5
Move to The solid content after dehydration by the pressure dehydrator 5 is incinerated,
The liquid component is returned to the receiving tank 2. On the other hand, the remaining undiluted solution from which contaminants have been removed by the contaminant removal device 4 is sent to the relay tank 6 for storage.
【００１８】中継槽６内の原液はポンプ７で液体サイク
ロン８へ送る。（なお、液体サイクロン８の分離性能は
流量によって変化するので、ボンプ７は定量ポンプ又は
流量制御装置を備えたポンプとする。）液体サイクロン
８は細砂の除去性能が高い。液体サイクロン８でほぼ完
全に細砂が取り除かれた後の液体は、液体サイクロン８
の上方から貯溜槽１１へと流出する。貯溜槽１１内の液
体は貯溜槽ポンプ１２によって生物学的処理工程へ回
す。The stock solution in the relay tank 6 is sent to the hydrocyclone 8 by the pump 7. (Because the separation performance of the hydrocyclone 8 varies depending on the flow rate, the pump 7 is a fixed-quantity pump or a pump provided with a flow rate control device.) The hydrocyclone 8 has high fine sand removal performance. The liquid after the fine sand is almost completely removed by the hydrocyclone 8 is the hydrocyclone 8
Flows out from above into the storage tank 11. The liquid in the storage tank 11 is sent to the biological treatment step by the storage tank pump 12.
【００１９】他方、細砂を含む濃縮液は液体サイクロン
８の下部から重力式脱水機９へ送る。液体サイクロン８
の下部から流出する濃縮液の流量と液体サイクロン８に
入る原液の流量との比は、０．０１程度にすることがで
きる。したがって、重力式脱水機９で処理する量は液体
サイクロン８で処理する原液の量の１％程度であり、重
力式脱水機９は極めて小型のもので済むことになる。重
力式脱水機９では細砂を分離し、細砂は脱水砂ホッパ１
０へ送って残りの液は中継槽６へ還流させることにな
る。脱水砂ホッパ１０内の細砂は、埋立てに使ったり焼
却したりする。On the other hand, the concentrated liquid containing fine sand is sent from the lower part of the hydrocyclone 8 to the gravity dehydrator 9. Liquid cyclone 8
The ratio of the flow rate of the concentrate flowing out from the lower part of the liquid crystal to the flow rate of the stock solution entering the liquid cyclone 8 can be about 0.01. Therefore, the amount to be processed by the gravity type dehydrator 9 is about 1% of the amount of the stock solution to be processed by the liquid cyclone 8, and the gravity type dehydrator 9 can be extremely small. In the gravity dewatering machine 9, fine sand is separated, and the fine sand is dewatered sand hopper 1
0 and the remaining liquid is returned to the relay tank 6. The fine sand in the dehydrated sand hopper 10 is used for landfill or incinerated.
【００２０】ここで、重力式脱水機９について、代表的
な１例を図２に基づいて説明する。本体２０は縦型容器
状にし、下部はコーン状にしている。コーン部において
は、内壁と一定の間隔をあけて内壁に沿ったコーン状の
ろ板２１を設けている。ろ板２１としては、例えば直径
１ｍｍの穴をピッチ２ｍｍで一様にあけた多孔板、また
はくさび状の棒を１ｍｍの隙間をあけて多数並べて板状
にしたウエッジワイヤを用いる。ろ板２１の内部下方に
は洗浄液排出口２６を設け、その下方には排出弁２３を
備えた固形物排出口を設けている。また、本体２０の上
方には濃縮液流入口２４を設け、下方にはろ液排出口２
５を設けている。本体２０の内部中央にはスプレーノズ
ルを備えた洗浄管２２を上方から垂直に設け、洗浄管２
２は本体２０上に設けたモータで回転させるようにして
いる。Here, a typical example of the gravity type dehydrator 9 will be described with reference to FIG. The main body 20 has a vertical container shape, and the lower portion has a cone shape. In the cone portion, a cone-shaped filter plate 21 is provided along the inner wall at a predetermined interval from the inner wall. As the filter plate 21, for example, a perforated plate in which holes of 1 mm in diameter are uniformly formed at a pitch of 2 mm, or a wedge wire in which a large number of wedge-shaped rods are arranged with a gap of 1 mm to form a plate is used. A cleaning liquid discharge port 26 is provided below the inside of the filter plate 21, and a solid discharge port provided with a discharge valve 23 is provided below the cleaning liquid discharge port 26. A concentrated liquid inlet 24 is provided above the main body 20, and a filtrate outlet 2 is provided below.
5 are provided. A washing pipe 22 having a spray nozzle is provided vertically from above in the center of the inside of the main body 20.
2 is rotated by a motor provided on the main body 20.
【００２１】重力式脱水機９の作動は、次のとおりであ
る。固形物排出口の排出弁２３及び洗浄液排出口２６を
閉じ、細砂を含む濃縮液を濃縮液流入口２４から流入さ
せていく。細砂はろ板２１に沿って下方へと沈降してい
き、ろ板２１を通過したろ液はろ液排出口２５から流出
していく。ろ板２１の内側部分は細砂が沈降するのに十
分な空間を持っているため、大部分の細砂はろ板２１を
通過することなくろ板２１の内側部分の下方へと沈降し
堆積していく。The operation of the gravity type dehydrator 9 is as follows. The discharge valve 23 of the solid discharge port and the cleaning liquid discharge port 26 are closed, and the concentrated liquid containing fine sand flows in from the concentrated liquid inlet 24. The fine sand sinks down along the filter plate 21, and the filtrate that has passed through the filter plate 21 flows out from the filtrate discharge port 25. Since the inner portion of the filter plate 21 has enough space for the fine sand to settle, most of the fine sand settles below the inner portion of the filter plate 21 without passing through the filter plate 21 and accumulates. To go.
【００２２】そして、昼間は図１に示した前処理工程の
運転を続ける。一日の所定量を処理し終わったところで
運転を止める。重力式脱水機９は翌日までそのまま放置
する。捕捉した細砂に含まれる水分はろ板２１の小孔を
通って流出し続け、細砂は次第に脱水されていく。翌日
になったら固形物排出口の排出弁２３を開き、脱水され
た細砂を脱水砂ホッパ１０へと排出する。それから固形
物排出口の排出弁２３を閉じて洗浄液排出口２６を開け
る。洗浄管２２を回転させながらスプレーノズルから洗
浄水を噴出させ、ろ板２１を洗浄していく。洗浄液は洗
浄液排出口２６から流出していく。洗浄が終わったら、
洗浄液排出口２６を閉じる。それから、図１に示す前処
理工程の運転を再開する。During the daytime, the operation of the pretreatment step shown in FIG. 1 is continued. The operation is stopped when a predetermined amount of the day has been processed. The gravity type dehydrator 9 is left as it is until the next day. The water contained in the captured fine sand continues to flow through the small holes of the filter plate 21, and the fine sand is gradually dehydrated. On the next day, the discharge valve 23 of the solid discharge port is opened, and the dewatered fine sand is discharged to the dewatered sand hopper 10. Then, the discharge valve 23 of the solid matter discharge port is closed, and the cleaning liquid discharge port 26 is opened. The washing water is spouted from the spray nozzle while rotating the washing pipe 22 to wash the filter plate 21. The cleaning liquid flows out from the cleaning liquid outlet 26. After cleaning,
The cleaning liquid outlet 26 is closed. Then, the operation of the pretreatment process shown in FIG. 1 is restarted.
【００２３】実験に使用した液体サイクロン・重力式脱
水機について細砂除去性能を測定した結果を示す。 液体サイクロン 供給量 ８．０ ｍ３／ｈｒ 流入液中の砂流量 ３．４７ ｋｇ／ｈｒ 濃縮液中の砂流量 ０．２１ ｋｇ／ｈｒ 砂除去率 ９３．９ ％ 重力式脱水機 濃縮液流量 ０．０７４ ｍ３／ｈｒ 濃縮液中の砂流量 ３．２６ ｋｇ／ｈｒ ろ液中の砂流量 ０．１０ ｋｇ／ｈｒ 砂除去率 ９６．９ ％The results of measuring the fine sand removal performance of the hydrocyclone gravity dehydrator used in the experiment are shown. Liquid cyclone supply rate 8.0 m 3 / hr Sand flow rate in influent 3.47 kg / hr Sand flow rate in concentrate 0.21 kg / hr Sand removal rate 93.9% Gravity dehydrator Concentrate flow 0 0.074 m 3 / hr Sand flow rate in concentrated liquid 3.26 kg / hr Sand flow rate in filtrate 0.10 kg / hr Sand removal rate 96.9%
【００２４】[0024]
【発明の効果】本発明に係るものは、設備が安価で運転
費用も安くつく。そして、効率的な砂除去ができる。According to the present invention, the equipment is inexpensive and the operating cost is low. And efficient sand removal can be performed.
【図面の簡単な説明】[Brief description of the drawings]
【図１】発明の実施の形態を示すフローシートである。FIG. 1 is a flow sheet showing an embodiment of the present invention.
【図２】図１に示したものの要部を示す断面図である。FIG. 2 is a sectional view showing a main part of the one shown in FIG.
８ 液体サクロン ９ 重力式脱水機 ２０ 本体
２１ ろ板 ２３ 排出弁 ２４ 濃縮液流入口 ２６ 洗
浄液排出口Reference Signs List 8 liquid saclon 9 gravity dehydrator 20 main body 21 filter plate 23 discharge valve 24 concentrated liquid inlet 26 washing liquid outlet
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭62−129114（ＪＰ，Ａ) 特開 平４−358507（ＪＰ，Ａ) 特公 平３−58796（ＪＰ，Ｂ２) 特公 昭47−5788（ＪＰ，Ｂ１) (58)調査した分野(Int.Cl.6，ＤＢ名) C02F 11/00 C02F 11/12 B01D 29/00 - 29/68 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-129114 (JP, A) JP-A-4-358507 (JP, A) JP-B3-58796 (JP, B2) JP-B-47-197 5788 (JP, B1) (58) Fields investigated (Int. Cl. 6 , DB name) C02F 11/00 C02F 11/12 B01D 29/00-29/68
Claims (2)
する工程の前処理工程において、夾雑物を除去した原液
を液体サイクロンに入れて分離作業をした後に液体サイ
クロンの下部から流出する細砂を含む濃縮液を重力式脱
水機へ送り込んで重力式脱水機で細砂を捕捉する工程を
設け、前記の生物学的方法で処理する工程は全日の連続
運転とするが前処理工程は昼間だけの断続運転とし、重
力式脱水機においては運転停止後は細砂を捕捉した状態
のまま翌日まで放置して細砂の脱水を進行させ、翌日は
重力式脱水機の脱水細砂を取り除いてから前処理工程の
運転を再開することを特徴とする、し尿及び浄化槽汚泥
中の砂除去方法。1. A fine sand flowing out from a lower part of a liquid cyclone after a separation operation in which a stock solution from which contaminants have been removed is put into a liquid cyclone in a pretreatment step of a step of treating human waste and septic tank sludge by a biological method. Provide a step of feeding the concentrated solution containing to the gravity dehydrator and capture fine sand with the gravity dehydrator, the step of treating by the biological method is a continuous operation all day, but the pretreatment step is only in the daytime In the intermittent operation of the gravity dehydrator, after the operation is stopped, the fine sand is dewatered by leaving the fine sand trapped until the next day while capturing the fine sand, and after removing the dewatered fine sand of the gravity dehydrator on the next day, A method for removing sand from night soil and septic tank sludge, wherein the operation of the pretreatment step is restarted.
する工程の前処理工程において使用するものであって、
夾雑物を除去した原液を液体サイクロンへ送る定量ポン
プ又は流量制御装置を備えたポンプと、そのポンプによ
り送り込まれた原液を分離処理する液体サイクロンと、
及びその液体サイクロンの下部から流出する細砂を含む
濃縮液を受け入れて脱水処理をする重力式脱水機とを備
え、この重力式脱水機は、縦型容器状とした本体の内部
に、下方へ行くほど断面積が次第に小さくなる部分を備
えたろ板を設けてろ板により本体内を内側部分と外側部
分とに区画し、ろ板の内側部分の上方に濃縮液流入口を
設けて外側部分にろ液排出口を設け、ろ板の内側部分下
方には洗浄液排出口と排出弁を備えた固形物排出口とを
設け、本体内の中央に洗浄管を垂直に設けたものとし
た、し尿及び浄化槽汚泥中の砂除去装置。2. The method according to claim 1, wherein the wastewater is treated in a biological treatment of human waste or septic tank.
A pump equipped with a metering pump or a flow rate control device that sends the undiluted solution to the liquid cyclone, and a liquid cyclone that separates the undiluted solution sent by the pump,
And Bei a gravity dehydrator for dehydration process accept concentrate containing fine sand flowing out from the lower part of the hydrocyclone
This gravity type dehydrator has a vertical container
In addition, there is a section where the cross-sectional area gradually decreases
A filter plate is provided, and the inside of the main body is inside and outside by the filter plate.
And a concentrate inlet above the inside of the filter plate.
Provide a filtrate outlet on the outside part, below the inside part of the filter plate
Side has a cleaning liquid outlet and a solids outlet with a discharge valve.
And a vertical washing pipe in the center of the main body.
Also, a device for removing sand from human waste and septic tank sludge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7346222A JP2942884B2 (en) | 1995-11-30 | 1995-11-30 | Method and apparatus for removing sand from night soil and septic tank sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7346222A JP2942884B2 (en) | 1995-11-30 | 1995-11-30 | Method and apparatus for removing sand from night soil and septic tank sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09150195A JPH09150195A (en) | 1997-06-10 |
| JP2942884B2 true JP2942884B2 (en) | 1999-08-30 |
Family
ID=18381941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7346222A Expired - Fee Related JP2942884B2 (en) | 1995-11-30 | 1995-11-30 | Method and apparatus for removing sand from night soil and septic tank sludge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2942884B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001170413A (en) * | 1999-12-16 | 2001-06-26 | Mitsubishi Gas Chem Co Inc | Filter unit of treating vessel |
| JP4716802B2 (en) * | 2005-02-24 | 2011-07-06 | 三菱重工環境・化学エンジニアリング株式会社 | Sand removal system and method for human waste and septic tank sludge |
| JP5051004B2 (en) * | 2008-05-30 | 2012-10-17 | 栗田工業株式会社 | Method and apparatus for treating alkaline waste liquid containing water-soluble resin component |
| CN104556456B (en) * | 2015-01-20 | 2016-08-24 | 重庆科创职业学院 | A kind of integrated sewage disposal experiment pool |
-
1995
- 1995-11-30 JP JP7346222A patent/JP2942884B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09150195A (en) | 1997-06-10 |
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