JP5228269B2 - Shellfish processing method - Google Patents
Shellfish processing method Download PDFInfo
- Publication number
- JP5228269B2 JP5228269B2 JP2005287272A JP2005287272A JP5228269B2 JP 5228269 B2 JP5228269 B2 JP 5228269B2 JP 2005287272 A JP2005287272 A JP 2005287272A JP 2005287272 A JP2005287272 A JP 2005287272A JP 5228269 B2 JP5228269 B2 JP 5228269B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- shellfish
- separated
- solid
- separation
- 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.)
- Active
Links
- 235000015170 shellfish Nutrition 0.000 title claims description 56
- 238000003672 processing method Methods 0.000 title description 4
- 239000007788 liquid Substances 0.000 claims description 58
- 238000000926 separation method Methods 0.000 claims description 44
- 238000000034 method Methods 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 239000010802 sludge Substances 0.000 claims description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 20
- 230000002776 aggregation Effects 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 20
- 229910002651 NO3 Inorganic materials 0.000 claims description 18
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 18
- 238000005273 aeration Methods 0.000 claims description 17
- 238000005054 agglomeration Methods 0.000 claims description 15
- 239000013535 sea water Substances 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims description 9
- 238000001179 sorption measurement Methods 0.000 claims description 8
- 230000004520 agglutination Effects 0.000 claims description 6
- 238000004220 aggregation Methods 0.000 claims description 5
- 230000004931 aggregating effect Effects 0.000 claims description 4
- 239000012295 chemical reaction liquid Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims description 2
- 230000001464 adherent effect Effects 0.000 claims 1
- 230000001629 suppression Effects 0.000 claims 1
- 239000006228 supernatant Substances 0.000 description 7
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 6
- 238000005507 spraying Methods 0.000 description 6
- 238000001556 precipitation Methods 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 1
- 241000251468 Actinopterygii Species 0.000 description 1
- 241000238586 Cirripedia Species 0.000 description 1
- 241000237536 Mytilus edulis Species 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 241000237502 Ostreidae Species 0.000 description 1
- 241000242583 Scyphozoa Species 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical group C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 235000020636 oyster Nutrition 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Description
本発明は、冷却水として海水を取り入れる水路の壁に付着する貝類を剥離した際に発生
する廃棄物としての剥離貝類の処理方法に関する。
The present invention relates to a method for treating peeled shellfish as waste generated when shellfish attached to a wall of a water channel that takes in seawater as cooling water is peeled off.
発電所、化学コンビナート、製鉄所等のプラントでは、海水が工業用冷却水として大量
に使用されているが、この海水の採水のための海水水路の壁には大量のムラサキイガイ、
フジツボ、カキなどの貝類が付着する。
In plants such as power plants, chemical complexes, and steelworks, seawater is used in large quantities as industrial cooling water, but a large amount of blue mussel,
Shellfish such as barnacles and oysters adhere.
これらの付着した貝類を放置すると、配管閉塞、海水採水量の低下、冷却効率の低下、
ひいては装置故障、発電装置稼動効率の低下等の様々な障害を引き起こすため、発電所の
定期検査の時期に、水路の水を抜いて、または抜かずして付着貝類を剥離し、これを廃棄
物として処理していた。
If these attached shellfish are left unattended, piping clogging, reduction in seawater sampling, cooling efficiency,
As a result, various troubles such as equipment failure and reduction in power generation equipment operation efficiency are caused. Therefore, at the time of regular inspection of the power plant, the attached shellfish are peeled off by draining or not draining the water channel, and this is discarded as waste. Was treated as.
従来、剥離された貝類は、発電所等の敷地内に掘った穴に放置されていたが、夏場には量が多いことも相俟って、魚の腐敗したような臭気の発生や、投棄箇所からの汚水の流出といった環境汚染の問題があり、更に投棄場所の確保、投棄場所への運搬コスト等も大きな問題となっていた。
Conventional, peeled shellfish, which had been left in a hole Tsu drilling on site, such as a power plant, it also phase俟that the amount is large in the summer, generation of odor, such as corruption of fish, dumping There was a problem of environmental pollution such as the outflow of sewage from the location. Furthermore, securing the dumping location, the cost of transporting to the dumping location, etc. were also major issues.
剥離された貝類の腐敗臭防止方法として、硝酸塩水溶液を散布する方法と硝酸塩水溶液
中に浸漬する方法が提案されている（特許文献１参照）。また、剥離された貝類の処理方
法として、固液分離して分離液は凝集沈殿処理または活性汚泥し、固形分は破砕してまた
は破砕処理せずに、乾燥・焼却処理または酵素分解処理することが知られている（特開平
６−７９２５５、特開平６−１２９６２６、特開平８−８９９３３）。処理方法として、
くらげを破砕して懸濁水とし、この懸濁水を硫酸バンドによって凝集沈殿処理する方法（
特開平４−４８９８６号公報）がある。
A method in which jellyfish is crushed to form suspension water, and this suspension water is coagulated and precipitated with a sulfuric acid band (
JP-A-4-48986).
従来、剥離された貝類を固液分離して得られる、ヘドロを含む分離液は、凝集剤により
凝集処理をして、ＣＯＤを除去して浄化されていた。しかし、剥離された貝類が固液分離
されるまでに一部腐敗が起こり、分離液中にＣＯＤ成分が溶出して濃度が高くなり、凝集
処理をしてもＣＯＤの除去効果が十分ではなく、その処理水をさらに高度処理しても最終
処理水のＣＯＤはやや高いものとなっていた。そのため、処理設備が長大化し、処理コス
トも嵩んでいた。
Conventionally, a separation liquid containing sludge obtained by solid-liquid separation of peeled shellfish has been purified by aggregating with a flocculant to remove COD. However, some rot occurs before the peeled shellfish are solid-liquid separated, the COD component is eluted in the separated liquid and the concentration becomes high, and the removal effect of COD is not sufficient even if the aggregation treatment is performed. Even if the treated water was further advanced, the COD of the final treated water was somewhat high. For this reason, the processing equipment has become longer and the processing cost has increased.
本発明は上記従来の問題点を解決し、簡素な処理設備で、剥離された貝類を篩などの水
切り手段で分離して得られる分離液のＣＯＤを十分に低下させるように処理することがで
きる処理方法を提供することを目的とする。
The present invention solves the above-mentioned conventional problems, and can be processed with simple processing equipment so as to sufficiently reduce the COD of the separated liquid obtained by separating the peeled shellfish with a draining means such as a sieve. An object is to provide a processing method.
本発明（請求項１）の貝類の処理方法は、海水の水路壁から剥離された付着性の貝類を破砕して、または破砕せずに、水切り工程に移送する移送工程と、移送された貝類に硝酸塩を添加して腐敗臭防止とＣＯＤ抑制を行うとともに、水切りを行い、固形物と分離液とに分離する水切り工程と、分離した固形物を別途処理する工程と、分離した、ヘドロ分を含む分離液のＣＯＤ濃度が高い、１５０ｍｇ／Ｌ以上の場合は、曝気して、分離液のＣＯＤ濃度が高くない、１５０ｍｇ／Ｌ以上でない場合は、曝気せずに貯留する貯留工程と、貯留された分離液を、凝集反応槽に移送して凝集剤を添加し、凝集反応を行う凝集反応工程と、凝集反応工程の反応液を固液分離槽にて固液分離して分離汚泥と処理水を得る固液分離工程とを具備することを特徴とするものである。
The method for treating shellfish according to the present invention (Claim 1) includes a transfer step of transferring an adhesive shellfish peeled off from a seawater channel wall to a draining step without crushing or crushing, and a transferred shellfish Nitrate is added to prevent rot odor and control COD, drain the water, separate it into solids and separated liquid, separate the separated solids, separate the sludge When the separation liquid containing COD concentration is 150 mg / L or higher, aeration is performed, and when the COD concentration of the separation liquid is not high or 150 mg / L or higher, the storage step is stored without aeration. The separated liquid is transferred to an agglomeration reaction tank, a flocculant is added, and an agglutination reaction process is performed, and the reaction liquid of the agglomeration reaction process is solid-liquid separated in a solid-liquid separation tank to separate sludge and treated water. A solid-liquid separation step to obtain It is an.
本発明（請求項２）の貝類の処理方法は、海水の水路壁から剥離された付着性の貝類に硝酸塩を添加して腐敗臭防止とＣＯＤ抑制を行う腐敗臭防止工程と、硝酸塩が添加された貝類を破砕して、または破砕せずに、水切り工程に移送する移送工程と、移送された貝類を固形物と分離液とに分離する水切り工程と、分離した固形物を別途処理する工程と、分離した、ヘドロ分を含む分離液のＣＯＤ濃度が高い、１５０ｍｇ／Ｌ以上の場合は、曝気して、分離液のＣＯＤ濃度が高くない、１５０ｍｇ／Ｌ以上でない場合は、曝気せずに貯留する貯留工程と、貯留された分離液を、凝集反応槽に移送して凝集剤を添加し、凝集反応を行う凝集反応工程と、凝集反応工程の反応液を固液分離槽にて固液分離して分離汚泥と処理水を得る固液分離工程とを具備することを特徴とするものである。
In the method for treating shellfish of the present invention (Claim 2), a rotting odor prevention step for adding nitrite to adhering shellfish peeled off from a seawater channel wall to prevent rot odor and COD, and nitrate is added. A crushing process for transferring the shellfish to a draining process without crushing or crushing the shellfish, a draining process for separating the transferred shellfish into a solid and a separating liquid, and a process for separately processing the separated solid If the separated COD concentration of the separated liquid containing sludge is higher than 150 mg / L, aeration is performed. If the COD concentration of the separated liquid is not higher , and 150 mg / L or higher, storage is performed without aeration. A storage step, a stored separation liquid is transferred to an agglomeration reaction tank, a flocculant is added, and an agglutination reaction process for performing an agglomeration reaction; Solid-liquid separation process to obtain separated sludge and treated water It is characterized in that it comprises.
本発明（請求項３）の貝類の処理方法は、請求項１または２において、処理水をさらに
濾過処理後、活性炭吸着処理することを特徴とするものである。
The method for treating shellfish of the present invention (Claim 3) is characterized in that, in
かかる本発明の貝類の処理方法によると、剥離された貝類の移送前または水切り時に硝酸塩を散布するので、貯留される分離貝類の腐敗臭が防止されるとともに、分離液貯槽内の分離液もＣＯＤの増加が抑制される。
According to the shellfish treatment method of the present invention, since the nitrate is sprayed before the peeled shellfish is transferred or drained, the rot of the separated shellfish stored is prevented, and the separation liquid in the separation liquid storage tank is also COD. The increase of is suppressed.
剥離された貝類は、海水やヘドロとともにポンプ、バキュームカーまたはブルトーザーで移送されるが、移送前に水路底部に放置されると腐敗が進行するため、移送前に硝酸塩を散布することができる。剥離された貝類を放置せずにすぐ移送する場合は、水切り時に硝酸塩を散布する。
The peeled shellfish are transferred together with seawater and sludge by a pump, a vacuum car or a bulltozer. However, if the shellfish are left at the bottom of the water channel before the transfer, the decay proceeds, so that the nitrate can be sprayed before the transfer. When transporting peeled shellfish without leaving them, spray nitrate when draining.
硝酸塩としては、硝酸カルシウム、硝酸ナトリウム、硝酸カリウム、硝酸アンモニウムなどを用いる。使用方法としては、剥離された貝類を硝酸塩水溶液に浸漬する方法と、剥離された貝類に硝酸塩使用液を散布する方法がある。硝酸塩の使用量は、剥離された貝類の重量当り０．１〜１．０重量％が目安である。
The nitrates, calcium nitrate, sodium nitrate, potassium nitrate, Ru the like ammonium nitrate. As a method of use, there are a method of immersing the peeled shellfish in a nitrate aqueous solution and a method of spraying a nitrate use solution on the peeled shellfish. As a guide, the amount of nitrate used is 0.1 to 1.0% by weight based on the weight of the peeled shellfish.
剥離された貝類は、水切りに先立って、剥離された貝類の減容化のために必要に応じ、
破砕機で破砕処理を行う。次に剥離された貝は、篩などの水切り手段で分離される。篩の
ほかに、サイクロン分離機や遠心分離機なども使用可能である。分離液は、同伴する海水
の量や移送前の貝類の腐敗の進行度合いや、破砕による減容化の実施の有無により、ＣＯ
Ｄ濃度は異なるが、ＣＯＤ濃度が高い場合（通常、ＣＯＤ濃度が１５０ｍｇ／Ｌ以上の場
合）は、分離液貯槽において曝気を行う。この場合、下水等の活性汚泥処理装置のように
、沈殿槽を設けて分離汚泥を曝気部へ汚泥返送するような操作は不要である。同伴される
ヘドロ中には、好塩性の微生物が存在し、単に曝気するだけで、その微生物は増殖し、Ｂ
ＯＤ成分に相当するＣＯＤ成分を分解する。ＣＯＤが低下された分離液は、凝集反応槽に
移送される。
Exfoliated shellfish should be used to reduce the volume of peeled shellfish prior to draining.
Crushing is performed with a crusher. Next, the peeled shells are separated by a draining means such as a sieve. In addition to the sieve, a cyclone separator or a centrifuge can be used. Depending on the amount of seawater that accompanies, the degree of progress of rot of shellfish before transfer, and whether or not volume reduction by crushing is performed,
Although the D concentration is different, when the COD concentration is high (usually, when the COD concentration is 150 mg / L or more), aeration is performed in the separation liquid storage tank. In this case, unlike the activated sludge treatment apparatus such as sewage, an operation for providing a sedimentation tank and returning the separated sludge to the aeration unit is unnecessary. There are halophilic microorganisms in the accompanying sludge, and the microorganisms grow by simply aeration, and B
Decomposes the COD component corresponding to the OD component. The separation liquid with reduced COD is transferred to the agglomeration reaction tank.
分離液貯槽中の分離液のＣＯＤ濃度が高くない、１５０ｍｇ／Ｌ以上でない場合は、分離液貯槽において曝気を行うことなく、分離液は凝集反応槽に移送される。
When the COD concentration of the separation liquid in the separation liquid storage tank is not high , or 150 mg / L or more , the separation liquid is transferred to the agglomeration reaction tank without aeration in the separation liquid storage tank.
凝集反応槽においては、分離液に凝集剤を添加して凝集処理を行う。凝集剤としては、
硫酸バンド、ＰＡＣ（ポリ塩化アルミニウム）、塩化第二鉄、ポリ硫酸鉄などを使用する
。さらに、ポリアクリル酸ナトリウムやポリアクリルアミドの部分加水分解物などの凝集
剤を添加して、生成フロックを大きくし、沈殿分離を容易にすることもできる。
In the agglomeration reaction tank, an aggregating agent is added to the separation liquid to perform the agglomeration treatment. As a flocculant,
A sulfuric acid band, PAC (polyaluminum chloride), ferric chloride, polyiron sulfate, etc. are used. Furthermore, flocculants such as sodium polyacrylate and polyacrylamide partial hydrolyzate can be added to increase the generated floc and facilitate precipitation separation.
凝集反応液は、沈殿槽や浮上分離槽などの固液分離装置で分離汚泥と処理水とに分離さ
れる。分離汚泥は脱水され、脱水ケーキは廃棄物として処理され、処理水は放流されるか
、必要に応じ、さらに高度処理される。
The agglomeration reaction liquid is separated into separated sludge and treated water by a solid-liquid separation apparatus such as a precipitation tank or a floating separation tank. The separated sludge is dewatered, the dewatered cake is treated as waste, and the treated water is discharged or further processed as required.
高度処理としては、濾過処理とそれに引続く活性炭吸着処理が挙げられる。濾過処理には上層がアンスラサイト、下層が砂からなる二層濾過器を用い、これに下向流で通水した後、活性炭吸着処理には、粒状活性炭を充填した活性炭塔を用い、これに下向流で通水して高度にＣＯＤを除去した処理水を得ることができる。
Examples of advanced treatment include filtration treatment and subsequent activated carbon adsorption treatment. Filtration layer is anthracite in the lower layer is used a two-layer filter composed of sand, was passed through in downward flow thereto, the activated carbon adsorption treatment, using the activated carbon column filled with granular activated carbon, to can possible to get the treated water highly removed COD was passed through under countercurrent.
本発明によれば、剥離された貝類の移送前または篩などによる水切り時に硝酸塩を散布するので、貯留される分離貝類の腐敗臭が防止されるとともに、分離液貯槽内の分離液もＣＯＤの増加が抑制される。したがって、後続する凝集処理により、分離液のＣＯＤ除去は容易に行われる。
According to the present invention, since the nitrate is sprayed before the peeled shellfish is transferred or drained by a sieve or the like, the rot odor of the separated shellfish stored is prevented, and the separation liquid in the separation liquid storage tank also increases COD. Is suppressed. Therefore, the COD removal of the separation liquid is easily performed by the subsequent aggregation process.
以下に図面を参照して本発明の実施の形態を詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
図１は本発明の貝類の処理方法の実施の形態を示す系統図である。
海水の水路壁１から剥離された貝類２は、ポンプ（図示せず）により移送され、破砕機（図示せず）により破砕して、または破砕せずに篩３の上に放出され、篩３からすべり落ちた貝類は一時貯留場４に貯留されるとともに、分離液は同伴されるヘドロとともに貯槽５に貯留される。硝酸塩は、散布手段６から篩３の上の貝類に散布され、一時貯留場４の貯留される貝類は、腐敗臭が防止される。
FIG. 1 is a system diagram showing an embodiment of the shellfish treatment method of the present invention.
The
分離液は、貯槽５において必要に応じて曝気手段７により曝気する。分離液には同伴す
るヘドロが存在するので、単に曝気するだけで好塩性の微生物が活性となり、分離液中の
溶解性有機物を分解するので、ＣＯＤを除去することができる。貯槽５内の分離液はポン
プＰ１で凝集反応槽８に移送され、そこで凝集剤９が添加され、凝集処理される。すなわ
ち、硫酸バンドや塩化第二鉄の添加により生成フロックにＣＯＤ成分が取り込まれる。生
成したフロックは、沈殿槽１０で上澄水と沈殿汚泥とに分離される。沈殿汚泥は汚泥排出
管１１から排出され、別途処理される。上澄水は、そのまま放流してもよいが、ポンプピ
ット１２からポンプＰ２により、必要に応じて濾過器１３および／または活性炭吸着塔１
４に通水してさらに微細懸濁物やＣＯＤを除去して高度処理を行い、排出管１５から排出
する。
The separation liquid is aerated by the aeration means 7 in the storage tank 5 as necessary. Since there is sludge accompanying the separation liquid, halophilic microorganisms become active by simply aeration and decompose soluble organic substances in the separation liquid, so that COD can be removed. The separation liquid in the storage tank 5 is transferred to the agglomeration reaction tank 8 by the pump P1, where the flocculant 9 is added and agglomeration is performed. That is, the COD component is taken into the generated floc by the addition of a sulfate band or ferric chloride. The generated floc is separated into supernatant water and precipitated sludge in the settling tank 10. The precipitated sludge is discharged from the sludge discharge pipe 11 and processed separately. The supernatant water may be discharged as it is, but if necessary, the
4 is passed through to remove the fine suspension and COD, perform advanced treatment, and discharge from the
図１に示す貝類の処理装置を用いて、貝類の処理を行った。ただし、破砕機、曝気手段７、濾過器１３および活性炭吸着塔１４は稼動を停止した。まず剥離された貝類は、海水とともに篩３に移送され、分離した貝類は一時貯留場４に貯留し、分離液（ＣＯＤMn５０ｍｇ／Ｌ）は、貯槽５に受け入れた。その際、篩３上には、硝酸カルシウムを海水に溶かした５０％溶液を硝酸カルシウムとして、貝類重量当り０．１％となるように散布した。分離液は曝気することなく、ポンプＰ１で流量５ｍ3／ｈｒで凝集反応槽８に送られ、そこに塩化第二鉄を３００ｍｇ／Ｌ添加して凝集処理を行い、沈殿槽（分離面積：２０ｍ2）で固液分離した。上澄水のＣＯＤMnは１５ｍｇ／Ｌであった。なお、一時貯留場の分離貝は、５日放置されたが、腐敗臭はしなかった。
比較例１ 実施例１において、硝酸塩を散布することなく、実施例１と同様の処理を行ったところ、上澄水のＣＯＤMnは３０ｍｇ／Ｌであった。なお、一時貯留場の分離貝は、１日放置後には腐敗臭が鼻を刺激した。
実施例２実施例１において、同伴海水が少なく、分離液のＣＯＤ濃度がＣＯＤMn４００ｍｇ／Ｌと高かったので曝気手段を稼動させ、分離液１ｍ3当り空気を０．０１ｍ3／ｍｉｎ曝気し、さらに濾過器１３（二層濾過器：１．４ｍ3）および活性炭吸着塔（１．４ｍ3）にそれぞれＳＶ０．７ｈｒ-1で通水したところ、沈殿槽１２の上澄水３および最終処理水のＣＯＤMnはそれぞれ８０ｍｇ／Ｌおよび１０ｍｇ／Ｌであった。
比較例２ 実施例２において、硝酸塩を散布することなく、実施例２と同様の処理を行ったところ、分離液のＣＯＤMnは１００ｍｇ／Ｌであり、上澄水のＣＯＤMnは２０ｍｇ／Ｌであった。なお、一時貯留場の分離貝は、１日放置後には腐敗臭が鼻を刺激した。
The shellfish was processed using the shellfish processing apparatus shown in FIG. However, the crusher, the aeration means 7, the
Comparative Example 1 In Example 1, when the same treatment as in Example 1 was performed without spraying nitrate , the CODMn of the supernatant water was 30 mg / L. In addition, the rot of the separated shellfish in the temporary storage area stimulated the nose after being left for one day.
Example 2 In Example 1, the amount of entrained seawater was small and the COD concentration of the separation liquid was as high as CODMn 400 mg / L. Therefore, the aeration means was operated, air was aerated at 0.01 m3 / min per 1 m3 of the separation liquid, and the filter 13 (Two-layer filter: 1.4 m 3) and activated carbon adsorption tower (1.4 m 3) at SV 0.7 hr −1, respectively, the CODMn of the supernatant water 3 and final treated water of the precipitation tank 12 was 80 mg / L, respectively. And 10 mg / L.
Comparative Example 2 In Example 2, the same treatment as in Example 2 was performed without spraying nitrate . As a result, the CODMn of the separated liquid was 100 mg / L, and the CODMn of the supernatant water was 20 mg / L. In addition, the rot of the separated shellfish in the temporary storage area stimulated the nose after being left for one day.
以上の結果から、剥離された貝類の篩による分離時に硝酸塩を散布する実施例１および実施例２では、一時貯留した貝類の腐敗臭防止の効果もあり、分離液のＣＯＤ低減が可能となった。このため、上澄水または最終処理水の水質は良好となった。
From the above results, in Example 1 and Example 2 in which nitrate was sprayed during separation of the peeled shellfish with a sieve, there was also an effect of preventing rot odor of the temporarily stored shellfish, and COD reduction of the separated liquid was made possible. . For this reason, the quality of the supernatant water or the final treated water was good.
１ 水路壁
２ 貝類
３ 篩
４ 一時貯留場
５ 貯槽
６ 散布手段
７ 曝気手段
８ 凝集反応槽
９ 凝集剤
１０ 沈殿槽
１１ 汚泥排出管
１２ ポンプピット
１３ 濾過器
１４ 活性炭吸着塔
１５排出管
DESCRIPTION OF SYMBOLS 1
Claims (3)
移送された貝類に硝酸塩を添加して腐敗臭防止とＣＯＤ抑制を行うとともに、水切りを行い、固形物と分離液とに分離する水切り工程と、
分離した固形物を別途処理する工程と、
分離した、ヘドロ分を含む分離液のＣＯＤ濃度が高い、１５０ｍｇ／Ｌ以上の場合は、曝気して、分離液のＣＯＤ濃度が高くない、１５０ｍｇ／Ｌ以上でない場合は、曝気せずに貯留する貯留工程と、
貯留された分離液を、凝集反応槽に移送して凝集剤を添加し、凝集反応を行う凝集反応工程と、
凝集反応工程の反応液を固液分離槽にて固液分離して分離汚泥と処理水を得る固液分離工程と
を具備することを特徴とする貝類の処理方法。
A transfer step of transferring to the draining step without crushing or crushing the adherent shellfish peeled off from the sea water channel wall;
Nitrate is added to the transferred shellfish to prevent spoiled odor and COD suppression, draining and separating into solid and separated liquid,
A step of separately processing the separated solid,
If the separated liquid containing sludge has a high COD concentration of 150 mg / L or more, it is aerated, and if the COD concentration of the separated liquid is not high or not 150 mg / L or more, it is stored without aeration. A storage process;
An agglutination reaction step in which the stored separation liquid is transferred to an agglomeration reaction tank, an aggregating agent is added, and an agglutination reaction is performed;
A method for treating shellfish, comprising: a solid-liquid separation step of obtaining a separated sludge and treated water by solid-liquid separation of a reaction liquid in the aggregation reaction step in a solid-liquid separation tank.
硝酸塩が添加された貝類を破砕して、または破砕せずに、水切り工程に移送する移送工程と、
移送された貝類を固形物と分離液とに分離する水切り工程と、
分離した固形物を別途処理する工程と、
分離した、ヘドロ分を含む分離液のＣＯＤ濃度が高い、１５０ｍｇ／Ｌ以上の場合は、
曝気して、分離液のＣＯＤ濃度が高くない、１５０ｍｇ／Ｌ以上でない場合は、曝気せずに貯留する貯留工程と、
貯留された分離液を、凝集反応槽に移送して凝集剤を添加し、凝集反応を行う凝集反応工程と、
凝集反応工程の反応液を固液分離槽にて固液分離して分離汚泥と処理水を得る固液分離工程と
を具備することを特徴とする貝類の処理方法。
A rotting odor prevention process in which nitrate is added to adhering shellfish peeled off from the channel wall of seawater to prevent rotting odor and COD;
Crushing the shellfish to which nitrate has been added, or transferring it to the draining process without crushing;
A draining process for separating the transferred shellfish into a solid and a separating liquid;
A step of separately processing the separated solid,
In the case where the separated COD concentration of the separated liquid containing sludge is high, 150 mg / L or more,
When aeration is performed and the COD concentration of the separation liquid is not high , 150 mg / L or more, a storage step of storing without aeration,
An agglutination reaction step in which the stored separation liquid is transferred to an agglomeration reaction tank, an aggregating agent is added, and an agglutination reaction is performed;
A method for treating shellfish, comprising: a solid-liquid separation step of obtaining a separated sludge and treated water by solid-liquid separation of a reaction liquid in the aggregation reaction step in a solid-liquid separation tank.
3. The method for treating shellfish according to claim 1, wherein the treated water is further subjected to filtration treatment and then subjected to activated carbon adsorption treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005287272A JP5228269B2 (en) | 2005-09-30 | 2005-09-30 | Shellfish processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005287272A JP5228269B2 (en) | 2005-09-30 | 2005-09-30 | Shellfish processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2007098188A JP2007098188A (en) | 2007-04-19 |
| JP5228269B2 true JP5228269B2 (en) | 2013-07-03 |
Family
ID=38025655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2005287272A Active JP5228269B2 (en) | 2005-09-30 | 2005-09-30 | Shellfish processing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5228269B2 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0679255A (en) * | 1992-09-02 | 1994-03-22 | Fuji Electric Co Ltd | Treatment system for marine living things |
| JP3405120B2 (en) * | 1997-05-26 | 2003-05-12 | 栗田工業株式会社 | Seawater organisms spoilage odor inhibitor and method for seawater organisms spoilage odor prevention |
| JP2002326078A (en) * | 2001-05-07 | 2002-11-12 | Ishikawajima Harima Heavy Ind Co Ltd | Treatment process of dredged shellfish and equipment for the same process |
| JP3925123B2 (en) * | 2001-07-26 | 2007-06-06 | 関西電力株式会社 | Jellyfish processing apparatus and processing method |
| JP3801036B2 (en) * | 2001-12-04 | 2006-07-26 | 東北電力株式会社 | Jellyfish rot odor control device |
-
2005
- 2005-09-30 JP JP2005287272A patent/JP5228269B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2007098188A (en) | 2007-04-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101628771B (en) | Method with zero discharge of waste water | |
| US5453203A (en) | Process and apparatus for purifying low polluted water | |
| JP2006218354A (en) | Method for treating fluorine-containing waste water | |
| JP2007175673A (en) | Treatment method of ammonia-containing drain | |
| JP5228269B2 (en) | Shellfish processing method | |
| WO2014197085A1 (en) | Desalting salty sludge system and method | |
| JP2000140891A (en) | Method for recovering phosphorus in sludge and device therefor | |
| JP3797296B2 (en) | Purification method of bottom sludge | |
| JPS58166914A (en) | Treatment of waste water | |
| JP2004008957A (en) | Phosphorus and nitrogen recovery method and apparatus therefor | |
| JP2009045549A (en) | Daily life drainage treatment ship | |
| JP2005185967A (en) | Treatment method and treatment apparatus for organic waste water | |
| JP2007069165A (en) | Method for treating ammonia-containing drainage | |
| JP3277832B2 (en) | Method for treating phosphorus recovered from sewage treatment water | |
| CN1278958C (en) | Method for removing ammonia nitrogen from reused sewage | |
| JP3742921B2 (en) | Treatment of leachate in a covered final disposal site | |
| JP2015128740A (en) | Method and apparatus for processing organic waste water | |
| JP4021688B2 (en) | Method and apparatus for treatment of wastewater containing fluorine and silicon | |
| JPH09299977A (en) | Method for removing or recovering phosphorous in sewage | |
| JP2003170173A (en) | Treatment method for waste water from coalyard | |
| JP2009039637A (en) | Method for purifying cyanide-containing wastewater | |
| JP2004113965A (en) | Waste water treatment equipment | |
| JP3925122B2 (en) | Jellyfish processing method | |
| AU2001261912B2 (en) | Treatment of effluent | |
| JP4457702B2 (en) | Wastewater treatment method and treatment apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20080807 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20100222 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20110222 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20110422 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20120221 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20120418 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20130219 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20130304 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20160329 Year of fee payment: 3 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 5228269 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |