JPH05131191A - Treatment of drained cleaning water - Google Patents
Treatment of drained cleaning waterInfo
- Publication number
- JPH05131191A JPH05131191A JP3319618A JP31961891A JPH05131191A JP H05131191 A JPH05131191 A JP H05131191A JP 3319618 A JP3319618 A JP 3319618A JP 31961891 A JP31961891 A JP 31961891A JP H05131191 A JPH05131191 A JP H05131191A
- Authority
- JP
- Japan
- Prior art keywords
- membrane
- water
- tank
- treatment
- treatment device
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 238000004140 cleaning Methods 0.000 title claims abstract description 21
- 239000012528 membrane Substances 0.000 claims abstract description 79
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000005345 coagulation Methods 0.000 claims abstract description 11
- 230000015271 coagulation Effects 0.000 claims abstract description 11
- 239000000701 coagulant Substances 0.000 claims abstract description 10
- 239000002253 acid Substances 0.000 claims abstract description 6
- 239000002351 wastewater Substances 0.000 claims description 26
- 238000005406 washing Methods 0.000 claims description 22
- 238000000926 separation method Methods 0.000 claims description 10
- 238000000108 ultra-filtration Methods 0.000 claims description 7
- 238000001223 reverse osmosis Methods 0.000 claims description 6
- 238000004220 aggregation Methods 0.000 claims description 5
- 230000002776 aggregation Effects 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000001471 micro-filtration Methods 0.000 claims description 3
- 239000002440 industrial waste Substances 0.000 abstract description 5
- 238000006386 neutralization reaction Methods 0.000 abstract description 3
- 239000008213 purified water Substances 0.000 abstract 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 5
- 230000004907 flux Effects 0.000 description 5
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 4
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 4
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 4
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000008394 flocculating agent Substances 0.000 description 3
- 238000005189 flocculation Methods 0.000 description 3
- 230000016615 flocculation Effects 0.000 description 3
- 239000003456 ion exchange resin Substances 0.000 description 3
- 229920003303 ion-exchange polymer Polymers 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000012459 cleaning agent Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- 229920000620 organic polymer Polymers 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-ONCXSQPRSA-N abietic acid Chemical compound C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C(O)=O RSWGJHLUYNHPMX-ONCXSQPRSA-N 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003657 drainage water Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Landscapes
- Manufacturing Of Printed Wiring (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、プリント基板の水洗浄
装置から排出される洗浄排水を処理する方法に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating cleaning waste water discharged from a water cleaning apparatus for printed circuit boards.
【０００２】[0002]
【従来の技術】プリント配線板にＩＣや、コンデンサ
ー、抵抗等の電気部品を半田付けする工程を実装工程と
呼び、実装したものをプリント基板と呼ぶ。実装工程に
おいては、丈夫な半田付けができるように、予めプリン
ト配線板にロジンフラックスを塗布しておき、実装後に
このロジンフラックス等を除去するために洗浄を行って
いる。プリント基板の洗浄には、従来、フロンや塩素系
有機溶剤が使用されていたが、これらの溶剤は地球環境
を汚染する物質として、西暦２，０００年には製造が禁
止されることになっている。これらに代わって採用され
だした方法の１つが水洗浄法である。これは、界面活性
剤、有機溶剤（アルコール系又は炭素数５〜１０からな
る炭化水素）、有機酸等と水とを混合した洗浄剤で洗浄
後、水ですすぐ方法である。水洗浄法では、当然に排水
中にこれらの界面活性剤や有機溶剤、プリント基板に付
着していたロジンフラックスや汚れ等が含まれている。2. Description of the Related Art A process of soldering an electric component such as an IC, a capacitor and a resistor to a printed wiring board is called a mounting process, and the mounted one is called a printed circuit board. In the mounting process, a rosin flux is applied to the printed wiring board in advance so that the soldering can be performed robustly, and cleaning is performed to remove the rosin flux and the like after mounting. Conventionally, CFCs and chlorinated organic solvents have been used for cleaning printed circuit boards, but these solvents are substances that pollute the global environment, and their production will be banned in 2000. There is. One of the methods adopted in place of these is the water washing method. This is a method of rinsing with water after washing with a detergent, an organic solvent (alcohol or hydrocarbon having 5 to 10 carbon atoms), an organic acid and the like mixed with water. In the water cleaning method, naturally, the surface-active agent, the organic solvent, the rosin flux and the dirt attached to the printed circuit board are contained in the waste water.
【０００３】従来、この水洗浄排水の処理は、通常次の
ような方法で処理されていた。１例として、図３に示す
ように、プリント基板の洗浄装置は、洗浄剤槽３０、第
１すすぎ槽３１、第２すすぎ槽３２、第３すすぎ槽３３
からなる。第１すすぎ槽３１の洗浄排水は比較的汚れの
濃度が高く、この排水を生物処理装置３４で活性汚泥処
理などの処理したのち、沈殿槽あるいは限外ろ過膜等を
使用した固液分離装置３５で固液分離し、処理水として
放流している。また、比較的汚れの少ない第２，３すす
ぎ槽３２，３３は、図示のように直列向流洗浄方式と
し、第２すすぎ槽３２の洗浄排水を活性炭塔３６，イオ
ン交換樹脂塔３７を通し、不純物を除去した後第３すす
ぎ槽３３に戻して再利用する。他の例としては、図４に
示すように、第２，３のすすぎ槽４２，４３を直列向流
洗浄方式とし、第２すすぎ槽４２の洗浄排水を限外ろ過
膜処理装置４４と逆浸透膜処理装置４５により２段膜処
理して不純物を除き、その処理水（膜透過水）を第３す
すぎ槽４３に戻して再利用する。一方、限外ろ過膜処理
装置４４及び逆浸透膜処理装置４５の濃縮水は、第１す
すぎ槽４１に戻し、第１すすぎ槽４１の洗浄排水は処理
をせず産廃貯槽４６に溜め、産業廃棄物として処理す
る。この第１すすぎ槽４１の洗浄排水は、ロジンフラッ
クス濃度が高く、ロジンフラックスに含まれるポリマー
成分が限外ろ過膜の目詰まりを早く起こすため、第１す
すぎ槽４１の洗浄排水は膜処理しないものとしている。Conventionally, the treatment of the water for washing and washing has been usually performed by the following method. As an example, as shown in FIG. 3, a cleaning device for a printed circuit board includes a cleaning agent tank 30, a first rinse tank 31, a second rinse tank 32, and a third rinse tank 33.
Consists of. The cleaning wastewater of the first rinsing tank 31 has a relatively high concentration of dirt, and after the wastewater is treated by the biological treatment device 34 such as activated sludge treatment, a solid-liquid separation device 35 using a sedimentation tank or an ultrafiltration membrane or the like. Solid-liquid separation is carried out and discharged as treated water. In addition, the second and third rinse tanks 32 and 33, which are relatively less contaminated, have a serial countercurrent cleaning method as shown in the figure, and the cleaning wastewater of the second rinse tank 32 is passed through an activated carbon tower 36 and an ion exchange resin tower 37. After removing the impurities, it is returned to the third rinse tank 33 and reused. As another example, as shown in FIG. 4, the second and third rinsing tanks 42 and 43 are of a series countercurrent cleaning system, and the cleaning wastewater of the second rinsing tank 42 and the ultrafiltration membrane treatment device 44 and the reverse osmosis. The membrane treatment device 45 performs a two-stage membrane treatment to remove impurities, and the treated water (membrane permeated water) is returned to the third rinse tank 43 for reuse. On the other hand, the concentrated water of the ultrafiltration membrane treatment device 44 and the reverse osmosis membrane treatment device 45 is returned to the first rinsing tank 41, and the cleaning wastewater of the first rinsing tank 41 is not processed and is stored in the industrial waste storage tank 46 to be industrially discarded. Treat as a thing. The washing wastewater of the first rinse tank 41 has a high rosin flux concentration, and the polymer component contained in the rosin flux causes the clogging of the ultrafiltration membrane to occur quickly. I am trying.
【０００４】[0004]
【発明が解決しようとする課題】上記図３に示す従来の
水洗浄排水処理においては、処理工程が多く、そのため
の設備が大規模になるばかりでなく、活性炭，イオン交
換樹脂等の再生を必要とし、操作も極めて複雑になると
いう問題点があり、また図４に示す従来の水洗浄排水処
理は、設備が小規模ですみ操作も容易であるが、膜処理
にとって障害となるポリマー成分等を避けるために、第
１すすぎ槽の水洗浄排水は処理せず、いたずらに産業廃
棄物の量を多くしているという問題点があった。本発明
は、水洗浄排水の処理に膜処理を適用し、上記従来の諸
問題を解消し、プリント基板の水洗浄排水の膜処理が困
難とされている第１すすぎ槽の洗浄排水を含めたすべて
の洗浄排水を同時に効果的に再利用可能な程度までに処
理できる方法を提供することを目的とするものである。In the conventional water washing and drainage treatment shown in FIG. 3 described above, not only is there a large number of treatment steps and the equipment therefor becomes large-scale, but it is also necessary to regenerate activated carbon, ion exchange resin, etc. However, there is a problem that the operation becomes extremely complicated, and the conventional water washing and wastewater treatment shown in FIG. 4 requires a small facility and is easy to operate, but it does not require the polymer components which are obstacles to the membrane treatment. In order to avoid it, there is a problem in that the amount of industrial waste is unnecessarily increased without treating the water washing drainage of the first rinse tank. The present invention applies the membrane treatment to the treatment of the water washing drainage, solves the above-mentioned conventional problems, and includes the washing drainage of the first rinse tank in which the membrane treatment of the water washing drainage of the printed circuit board is difficult. It is an object of the present invention to provide a method capable of treating all the cleaning wastewater to the extent that it can be effectively reused at the same time.
【０００５】[0005]
【課題を解決するための手段】本発明は、プリント基板
の水洗浄排水に無機凝集剤を添加して凝集反応を行わし
めた後、精密ろ過膜又は限外ろ過膜により膜分離し、得
られた膜透過水をさらに逆浸透膜により膜分離して膜透
過水を得ることを特徴とする洗浄排水の処理方法であ
り、また、前記無機凝集剤による凝集反応を行わしめる
に際し、前記水洗浄排水を酸により中和することを特徴
とする洗浄排水の処理方法である。Means for Solving the Problems The present invention is obtained by adding an inorganic coagulant to water washing wastewater of a printed circuit board to cause a coagulation reaction and then performing membrane separation with a microfiltration membrane or an ultrafiltration membrane. A method for treating washing wastewater, characterized in that the membrane permeated water is further separated by a reverse osmosis membrane to obtain membrane permeated water, and the water washing wastewater is used when performing an aggregation reaction with the inorganic coagulant. Is a method for treating cleaning wastewater, which is characterized by neutralizing water with an acid.
【０００６】[0006]
【作用】図１は本発明の一実施態様を示す系統説明図で
あって、プリント基板の水洗浄排水はすべて排水貯槽１
に貯留される。排水貯槽１に貯留された排水は、凝集槽
２に導かれ、ここで無機凝集剤（塩化第２鉄、硫酸アル
ミニウム、ポリ塩化アルミニウム等）３が加えられ、凝
集反応によって凝集フロックが形成され、排水中に溶解
しており膜の目詰まりを起こす成分を凝集フロックに取
り込む。凝集フロックを形成するための凝集剤として
は、一般に有機高分子凝集剤も知られているが、有機高
分子凝集剤を用いると、水中に残留するポリマー成分に
よってその後の膜処理において膜の目詰まりを早く起こ
すため、本発明では無機凝集剤を使用する。また、凝集
槽２では、無機凝集剤３のみの添加でよいが、同時に酸
（塩酸、硫酸、硝酸等）４で排水を中和することも好ま
しい。酸４で排水を中和することにより、無機凝集剤３
の添加量を減少させる効果があるとともに、後続する膜
処理における膜の目詰まり防止効果がある。次に、凝集
槽２で凝集した排水は、１段目ポンプ５で加圧されて１
段目膜処理装置６に送られ、膜分離される。１段目膜処
理装置６で使用される膜は、精密ろ過膜（ＭＦ膜）又は
限外ろ過膜（ＵＦ膜）である。１段目膜処理装置６で得
られた膜透過水は中間水槽７に送られる一方、凝集フロ
ックを含む濃縮水は排水貯槽１へ返送して循環処理され
る。所定濃度（５〜５０倍）に濃縮した濃縮水は濃縮水
槽８に送られる。FIG. 1 is a system explanatory view showing an embodiment of the present invention, in which all the cleaning and drainage water of the printed circuit board is a drainage storage tank 1.
Stored in. The wastewater stored in the wastewater storage tank 1 is guided to the flocculation tank 2, where an inorganic flocculant (ferric chloride, aluminum sulfate, polyaluminum chloride, etc.) 3 is added, and flocculation flocs are formed by a flocculation reaction, The components that are dissolved in the wastewater and cause the membrane to be clogged are incorporated into the floc. Organic polymer flocculants are also generally known as flocculants for forming floc, but when organic polymer flocculants are used, the polymer components remaining in water clog the membrane during subsequent membrane treatment. In the present invention, an inorganic coagulant is used in order to quickly cause Further, in the coagulation tank 2, only the inorganic coagulant 3 may be added, but it is also preferable to simultaneously neutralize the waste water with an acid (hydrochloric acid, sulfuric acid, nitric acid, etc.) 4. Inorganic coagulant 3 by neutralizing wastewater with acid 4
Has the effect of reducing the amount of addition of C. and the effect of preventing clogging of the film in the subsequent film treatment. Next, the waste water condensed in the coagulation tank 2 is pressurized by the first-stage pump 5 to
It is sent to the stage membrane treatment device 6 and membrane-separated. The membrane used in the first stage membrane treatment device 6 is a microfiltration membrane (MF membrane) or an ultrafiltration membrane (UF membrane). The membrane permeated water obtained in the first-stage membrane treatment device 6 is sent to the intermediate water tank 7, while the concentrated water containing the flocs of flocs is returned to the waste water storage tank 1 for circulation treatment. The concentrated water concentrated to a predetermined concentration (5 to 50 times) is sent to the concentrated water tank 8.
【０００７】中間水槽７に送られた１段目膜処理装置６
の膜透過水は、２段目ポンプ９で加圧されて２段目膜処
理装置１０に送られ、さらに膜分離される。２段目膜処
理装置１０で使用される膜は逆浸透膜（ＲＯ膜）であ
る。この２段目膜処理装置１０では、低分子量の溶解性
物質（溶解性有機物、溶解性無機物）等が除去され、そ
の膜透過水は処理水槽１１に送られ、洗浄水として再利
用することも放流することも可能である。２段目膜処理
装置１０の濃縮水は、中間水槽７へ返送して循環処理さ
れる。所定濃度まで溶解性物質が濃縮した濃縮水は濃縮
水槽８に送られる。First stage membrane treatment device 6 sent to the intermediate water tank 7.
The membrane permeated water is pressurized by the second-stage pump 9 and is sent to the second-stage membrane treatment device 10 for further membrane separation. The membrane used in the second stage membrane processing apparatus 10 is a reverse osmosis membrane (RO membrane). In the second-stage membrane treatment device 10, low molecular weight soluble substances (soluble organic substances, soluble inorganic substances) and the like are removed, and the membrane permeated water is sent to the treated water tank 11 and can be reused as washing water. It is also possible to release it. The concentrated water of the second stage membrane treatment device 10 is returned to the intermediate water tank 7 and is circulated. The concentrated water in which the soluble substance is concentrated to a predetermined concentration is sent to the concentrated water tank 8.
【０００８】[0008]
【実施例】次に実施例を示す。EXAMPLES Next, examples will be shown.
【０００９】実施例１ 表１に示す水質のプリント基板の水洗浄排水を凝集槽に
導き、硫酸２７５ｍｇ／Ｌ，塩化第２鉄３０ｍｇ／Ｌ添
加し、ＵＦ膜を使用した１段目膜処理装置で膜分離して
表１に示す水質の１段目膜透過水を得た。この１段目膜
透過水をさらにＲＯ膜を使用した２段目膜処理装置で膜
分離し、表１に示すような、洗浄水として再利用可能な
２段目膜透過水を得た。Example 1 The first-stage membrane treatment apparatus using a UF membrane was conducted by introducing the water washing wastewater of the printed board having the water quality shown in Table 1 to a coagulation tank, adding 275 mg / L of sulfuric acid and 30 mg / L of ferric chloride. Membrane separation was performed to obtain the first-stage membrane permeate having the water quality shown in Table 1. This first-stage membrane permeated water was further subjected to membrane separation by a second-stage membrane treatment device using an RO membrane to obtain second-stage membrane permeated water that can be reused as washing water as shown in Table 1.
【００１０】[0010]
【表１】 [Table 1]
【００１１】実施例２ 実施例１と同一のプリント基板の水洗浄排水を凝集槽に
導き、塩化第２鉄を３００ｍｇ／Ｌ添加し、ＵＦ膜を使
用した１段目膜処理装置で膜分離して表２に示す水質の
１段目膜透過水を得、さらにこの１段目膜透過水をＲＯ
膜を使用した２段目膜処理装置で膜分離し、表２に示す
水質の２段目膜透過水を得た。Example 2 The same water washing and drainage of the printed circuit board as in Example 1 was introduced into a coagulation tank, ferric chloride was added at 300 mg / L, and the membrane separation was performed by a first stage membrane treatment apparatus using a UF membrane. The first-stage membrane permeate having the water quality shown in Table 2 was obtained.
Membrane separation was performed with a second-stage membrane treatment device using a membrane to obtain second-stage membrane permeated water having the water quality shown in Table 2.
【００１２】[0012]
【表２】 [Table 2]
【００１３】実施例３ 実施例１と同一のプリント基板の水洗浄排水を用い、硫
酸２７５ｍｇ／Ｌ，塩化第２鉄３０ｍｇ／Ｌで中和凝集
した場合（本発明）と、硫酸を加えず、塩化第２鉄３０
０ｍｇ／Ｌで凝集した場合（本発明）と、中和凝集をし
なかった場合（比較例）の１段目膜処理装置（ＵＦ膜使
用）における各膜透過水量と回収率との関係を図２に示
す。このように、凝集をした場合は膜面の目詰まりがな
くなり、膜透過水量が増加したが、特に中和凝集した場
合に、その効果が著しかった。Example 3 Using the same water washing and drainage of the printed circuit board as in Example 1, when neutralization and aggregation were carried out with 275 mg / L sulfuric acid and 30 mg / L ferric chloride (invention), sulfuric acid was not added, Ferric chloride 30
FIG. 3 is a graph showing the relationship between the amount of permeated water and the recovery rate in the first-stage membrane treatment device (using a UF membrane) in the case of aggregation at 0 mg / L (invention) and in the case of no neutralization aggregation (comparative example). 2 shows. Thus, when agglomerated, the clogging of the membrane surface disappeared and the amount of water permeated through the membrane increased, but the effect was particularly remarkable when neutralized and agglomerated.
【００１４】[0014]
【発明の効果】以上述べたように、本発明は、プリント
基板の水洗浄排水を無機凝集剤による凝集処理後膜によ
る２段処理を行うことにより、再利用可能な清澄な処理
水を効率よく得ることができ、水洗浄排水のすべてを処
理して産業廃棄物の量を少なくし、しかも処理設備も小
規模ですむものである。Industrial Applicability As described above, according to the present invention, by carrying out the two-stage treatment with the membrane after the coagulation treatment with the inorganic coagulant for the water washing and drainage of the printed circuit board, the reusable clear treated water is efficiently produced. The amount of industrial waste can be reduced by treating all of the washing water and wastewater, and the treatment facility can be small scale.
【図１】本発明の一実施態様を示す系統説明図である。FIG. 1 is a system explanatory view showing an embodiment of the present invention.
【図２】本発明と比較例の各ＵＦ膜処理における膜透過
水量と回収率の関係を示す線図である。FIG. 2 is a diagram showing a relationship between a membrane permeated water amount and a recovery rate in each UF membrane treatment of the present invention and a comparative example.
【図３】従来の処理態様の一例を示す系統説明図であ
る。FIG. 3 is a system explanatory view showing an example of a conventional processing mode.
【図４】従来の処理態様の他の例を示す系統説明図であ
る。FIG. 4 is a system explanatory view showing another example of a conventional processing mode.
１ 排水貯槽 ２ 凝集槽 ３ 無機凝集剤 ４ 酸 ５ １段目ポンプ ６ １段目膜処理装置 ７ 中間水槽 ８ 濃縮水槽 ９ ２段目ポンプ 10 ２段目膜処理装置 11 処理水槽 30 洗浄剤槽 31 第１すすぎ槽 32 第２すすぎ槽 33 第３すすぎ槽 34 生物処理装置 35 固液分離装置 36 活性炭塔 37 イオン交換樹脂塔 41 第１すすぎ槽 42 第２すすぎ槽 43 第３すすぎ槽 44 限外膜処理装置 45 逆浸透膜処理装置 46 産廃貯槽 1 Drainage storage tank 2 Coagulation tank 3 Inorganic coagulant 4 Acid 5 1st stage pump 6 1st stage membrane treatment device 7 Intermediate water tank 8 Concentrated water tank 9 2nd stage pump 10 2nd stage membrane treatment device 11 Treatment water tank 30 Cleaning agent tank 31 First rinse tank 32 Second rinse tank 33 Third rinse tank 34 Biological treatment device 35 Solid-liquid separation device 36 Activated carbon tower 37 Ion exchange resin tower 41 First rinse tank 42 Second rinse tank 43 Third rinse tank 44 Ultramembrane Treatment equipment 45 Reverse osmosis membrane treatment equipment 46 Industrial waste storage tank
Claims (2)
を添加して凝集反応を行わしめた後、精密ろ過膜又は限
外ろ過膜により膜分離し、得られた膜透過水をさらに逆
浸透膜により膜分離して膜透過水を得ることを特徴とす
る洗浄排水の処理方法。1. An inorganic coagulant is added to a water washing wastewater of a printed circuit board to cause a coagulation reaction, and then the resulting membrane is separated by a microfiltration membrane or an ultrafiltration membrane, and the resulting membrane-permeated water is further reverse osmosis. A method for treating cleaning wastewater, characterized in that membrane permeation water is obtained by membrane separation.
めるに際し、前記水洗浄排水を酸により中和するもので
ある請求項１記載の洗浄排水の処理方法。2. The method for treating cleaning wastewater according to claim 1, wherein the water cleaning wastewater is neutralized with an acid when the aggregation reaction by the inorganic coagulant is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3319618A JPH05131191A (en) | 1991-11-08 | 1991-11-08 | Treatment of drained cleaning water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3319618A JPH05131191A (en) | 1991-11-08 | 1991-11-08 | Treatment of drained cleaning water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05131191A true JPH05131191A (en) | 1993-05-28 |
Family
ID=18112297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3319618A Pending JPH05131191A (en) | 1991-11-08 | 1991-11-08 | Treatment of drained cleaning water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05131191A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0768259A (en) * | 1993-09-01 | 1995-03-14 | Ngk Insulators Ltd | Membrane filtering method of polluted water |
| JP2002153871A (en) * | 2000-11-21 | 2002-05-28 | Mitsubishi Heavy Ind Ltd | Apparatus for recycling waste water |
| WO2003037488A1 (en) * | 2001-11-01 | 2003-05-08 | Akzo Nobel N.V. | Treatment of polyaluminium compounds |
| KR100429763B1 (en) * | 2002-01-08 | 2004-05-03 | 정건용 | Method for Recycling the Valuable Components from Cleaning Wastewater of Printed Circuit Board |
| KR100459861B1 (en) * | 2001-04-27 | 2004-12-03 | 샤프 가부시키가이샤 | Metal containing waste water treatment method and metal containing waste water treatment equipment |
| CN100450592C (en) * | 2007-02-15 | 2009-01-14 | 三达膜科技（厦门）有限公司 | Metal smelting factory sewage reclaiming method based on membrane filtering technique |
| JP2010502436A (en) * | 2006-09-07 | 2010-01-28 | ナルコ カンパニー | Method for removing heavy metals from industrial wastewater using submerged ultrafiltration membranes or microfiltration membranes |
| CN105600962A (en) * | 2015-10-28 | 2016-05-25 | 广德宝达精密电路有限公司 | Water purification wastewater recycling apparatus |
| JP2019126767A (en) * | 2018-01-24 | 2019-08-01 | ダイセン・メンブレン・システムズ株式会社 | Filtration treatment apparatus for contaminated water containing resin component and operational method thereof |
| WO2021215442A1 (en) * | 2020-04-24 | 2021-10-28 | ニプロ株式会社 | Pretreatment method and pretreatment system for drainage |
-
1991
- 1991-11-08 JP JP3319618A patent/JPH05131191A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0768259A (en) * | 1993-09-01 | 1995-03-14 | Ngk Insulators Ltd | Membrane filtering method of polluted water |
| JP2002153871A (en) * | 2000-11-21 | 2002-05-28 | Mitsubishi Heavy Ind Ltd | Apparatus for recycling waste water |
| KR100459861B1 (en) * | 2001-04-27 | 2004-12-03 | 샤프 가부시키가이샤 | Metal containing waste water treatment method and metal containing waste water treatment equipment |
| WO2003037488A1 (en) * | 2001-11-01 | 2003-05-08 | Akzo Nobel N.V. | Treatment of polyaluminium compounds |
| EP1439898A1 (en) * | 2001-11-01 | 2004-07-28 | AKZO Nobel N.V. | Treatment of polyaluminium compounds |
| KR100429763B1 (en) * | 2002-01-08 | 2004-05-03 | 정건용 | Method for Recycling the Valuable Components from Cleaning Wastewater of Printed Circuit Board |
| JP2010502436A (en) * | 2006-09-07 | 2010-01-28 | ナルコ カンパニー | Method for removing heavy metals from industrial wastewater using submerged ultrafiltration membranes or microfiltration membranes |
| CN100450592C (en) * | 2007-02-15 | 2009-01-14 | 三达膜科技（厦门）有限公司 | Metal smelting factory sewage reclaiming method based on membrane filtering technique |
| CN105600962A (en) * | 2015-10-28 | 2016-05-25 | 广德宝达精密电路有限公司 | Water purification wastewater recycling apparatus |
| JP2019126767A (en) * | 2018-01-24 | 2019-08-01 | ダイセン・メンブレン・システムズ株式会社 | Filtration treatment apparatus for contaminated water containing resin component and operational method thereof |
| WO2021215442A1 (en) * | 2020-04-24 | 2021-10-28 | ニプロ株式会社 | Pretreatment method and pretreatment system for drainage |
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