KR810000769B1 - Method of treating wastewater containing polyvinyl alcohol - Google Patents
Method of treating wastewater containing polyvinyl alcohol Download PDFInfo
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- KR810000769B1 KR810000769B1 KR7601294A KR760001294A KR810000769B1 KR 810000769 B1 KR810000769 B1 KR 810000769B1 KR 7601294 A KR7601294 A KR 7601294A KR 760001294 A KR760001294 A KR 760001294A KR 810000769 B1 KR810000769 B1 KR 810000769B1
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- boric acid
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- 239000002351 wastewater Substances 0.000 title claims description 20
- 238000000034 method Methods 0.000 title claims description 12
- 239000004372 Polyvinyl alcohol Substances 0.000 title description 18
- 229920002451 polyvinyl alcohol Polymers 0.000 title description 18
- 239000004327 boric acid Substances 0.000 claims description 19
- -1 boric acid compound Chemical class 0.000 claims description 13
- 150000003839 salts Chemical class 0.000 claims description 11
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 9
- 229910021538 borax Inorganic materials 0.000 claims description 6
- 150000001247 metal acetylides Chemical class 0.000 claims description 6
- 239000004328 sodium tetraborate Substances 0.000 claims description 6
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 4
- 150000001639 boron compounds Chemical class 0.000 claims 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims 1
- 239000012452 mother liquor Substances 0.000 description 14
- 229920002472 Starch Polymers 0.000 description 10
- 235000019698 starch Nutrition 0.000 description 10
- 239000008107 starch Substances 0.000 description 10
- 239000004744 fabric Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 4
- 241001442129 Myosotis Species 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 2
- 235000011130 ammonium sulphate Nutrition 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 244000144987 brood Species 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 229940125532 enzyme inhibitor Drugs 0.000 description 2
- 239000002532 enzyme inhibitor Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- IDCBOTIENDVCBQ-UHFFFAOYSA-N TEPP Chemical compound CCOP(=O)(OCC)OP(=O)(OCC)OCC IDCBOTIENDVCBQ-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 230000013595 glycosylation Effects 0.000 description 1
- 238000006206 glycosylation reaction Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 229940099596 manganese sulfate Drugs 0.000 description 1
- 235000007079 manganese sulphate Nutrition 0.000 description 1
- 239000011702 manganese sulphate Substances 0.000 description 1
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
내용 없음.No content.
Description
도면은 온도, pH에 의한 P.V.A 필름의 해교(解膠) 속도의 변화를 표시한 그래프이다.The figure is a graph which shows the change of the peptizing speed of P.V.A film by temperature and pH.
유기물질을 함유한 폐수의 처리방법에는 종래의 활성오니방식(活性汚泥方式)이 가장 많이 채용되고 있지만, 폴리비닐알코올 (이하 P.V.A라함)을 이 방식으로 분해 치리하는 것을 대단히 곤란하고, P.V.A를 함유한 폐수는 망초등의 무기염류의 존재하에 붕산 또는 붕사로 치리하여서 P.V.A를 붕산화합물로서 겔모양으로 응집시켜서 분리 회수하는 것이 가장 적합하다. 그러나, 이 경우 P.V.A를 분리 회수한 나머지의 모액에는 아직 소량의 붕산염이 뮤기염류와 함께 함유되어 있고, 이들 염류는 공해 규제치내에 있다. 하드라도 자연으로 방류시킬 것이 못되고, 또 이것을 방류하는 것은 자연면에서도 손실이 중대하다.Conventional activated sludge method is most commonly used for the treatment of wastewater containing organic substances. However, it is very difficult to decompose and process polyvinyl alcohol (hereinafter referred to as PVA) in this manner. One wastewater is treated with boric acid or borax in the presence of inorganic salts such as forget-me-not, so that PVA is collected and recovered by flocculation in a gel form as a boric acid compound. However, in this case, the remaining mother liquor from which P.V.A has been separated and recovered still contains a small amount of borate together with mu salts, and these salts are within the pollution limits. Even if it is hard, it cannot be discharged to nature, and discharge | release of this is also great loss in nature.
본 발명의 제1의 발명은 P.V.A를 함유한 여러가지의 폐수를 상기한 방법으로 치리하여서 P.V.A를 분리 회수함과 동시에, 그 모액을, 예를들면 직물의 발호(拔糊)등의 여러가지 용도에 반복 사용하는 것을 특징으로 하는 P.V.A를 함유한 폐수의 치리 방법이다.In the first aspect of the present invention, various wastewaters containing PVA are treated by the above-described method, and the PVA is separated and recovered, and the mother liquor is repeated for various uses, for example, the fabrication of fabrics. It is a control method of the wastewater containing PVA characterized by using.
P.V.A를 함유한 폐수에 붕산 또는 붕사 0.1~0.2%, 망초등의 무기염류 0.3~0.6%를 첨가하고 알칼리금속, 알칼리토류 금속의 산화물 또는 수산화물로 PH를 8~10으로 하여서 실온하에 P.V.A를 응집 분리한다. 폐수중의 유기물이 P.V.A 단독일 경우는 P.V.A 분리후의 모액을 0.05~0.08%의 붕산염(붕소로서)과 0.6~1.0%의 무기염류를 함유한다. 이 P.V.A 회수 모액을 예를들면 직물의 발호에 이용할때는 응집제의 소용량은 수도물의 경우의 약 30%로서 마칠 수 있고, 0.3~0.6%의 추가로서 충분하다. 단 이 경우 어느 정도 낙호도(落糊度)가 악화되므로, PH를 약간 높게하여 온도를 70℃ 이상으로 올려서 발호를 한다. 이것에 의하여 충분히 목적을 달성할 수가 있다. 회수된 P.V.A 붕산화합물은 섬유가 공, 지(紙)가공, 접착제등의 적당한 용도로 널리 이용할 수가 있다. 이 방법은 경제적이고, 또 특히 완전히 공해를 가져오지 않는 특징이 있다. 그러나, 상기한 P.V.A를 붕산화합물로서 응집 분리하는 방법에 있어서 폐수중에 P.V.A 이외에 고형의 불순물을 함유하는 경우는, 이것이 방해가 되어서 회수 P.V.A의 재이용에 지장을 초래할 수 있다. 예를들면 P.V.A를 함유한 직물의 발호처리 폐수는 모소(毛燒)공정에서 직물의 우모가 탄화되어서 생긴 탄화물 등에 의하여 탁하게되어, 착색되어 있는 일이 있고, 여기에서 회수된 P.V.A는 불순하고 착색되어 있다. 따라서 상기한 방법에 의하면 P.V.A가 응집할 때에 탄화물 및 염류를 동시에 흡수하기 때문에 P.V.A의 순도가 떨어져서 토양개량제로서 사용하는 이외에 고급품으로서의 이용은 곤란하다.PVA is flocculated at room temperature by adding 0.1-0.2% of boric acid or borax, and 0.3-0.6% of inorganic salts such as manganese to the wastewater containing PVA, and adjusting the pH to 8-10 with an oxide or hydroxide of alkali metal or alkaline earth metal. do. When the organic matter in the wastewater is P.V.A alone, the mother liquor after P.V.A separation contains 0.05 to 0.08% borate (as boron) and 0.6 to 1.0% inorganic salts. When this P.V.A recovered mother liquor is used, for example, for the fabrication of fabrics, the small amount of flocculant can be finished as about 30% of tap water, with an addition of 0.3-0.6% is sufficient. However, in this case, since the degree of deterioration is deteriorated to some extent, the pH is slightly increased, and the temperature is raised to 70 ° C. or higher to perform the call. Thereby, the objective can be fully achieved. The recovered P.V.A boric acid compound can be widely used for suitable applications such as fiber processing, paper processing, adhesives, and the like. This method is characterized by being economical and especially not completely pollution free. However, in the method of coagulating and separating P.V.A as a boric acid compound, when the wastewater contains solid impurities other than P.V.A, this may interfere and may cause a re-use of the recovered P.V.A. For example, the effluent treatment wastewater of PVA-containing fabrics may become cloudy due to carbides produced by carbonization of the wool of the fabric in the woolen process, and may be colored. The PVA recovered therein is impure and colored. have. Therefore, according to the method described above, when P.V.A aggregates, carbides and salts are absorbed at the same time, so the purity of P.V.A is low, so that it is difficult to use it as a high-quality product in addition to using it as a soil improving agent.
이와같은 결점을 개량하고 순도높은 P.V.A 붕산 화합물을 회수하기 위하여, 본 발명의 제2의 발명에 있어서서는 폐수에 붕산 또는 붕사 및 망초, 황산암모늄등의 무기염료를 첨가하여로 PH 4~7로서 70℃ 이상으로 가열한 후, PH를 8~10으로 조정한 실온으로 냉각시키는 것에 의하여, 탄화물 및 불필요한 염류등을 함유하지 않고 무색이고순도가 높은 P.V.A 붕산 화합물을 분리 회수한다. 폐수가 P.V.A 만을 함유한 경우에 있어서도 얻어지는 P.V.A 붕산 화합물의 염류 함유량이 감소되는 이점이 있다. 약한 산성에서 고온으로 가열하는 것에 의하여 P.V.A가 충분히 해교(解膠)되고, 그 냉각에 있어서 P.V.A가 붕산화합물 등의 고형물, 과잉된 염류를 흡수하는 일 없이 높은 순도로 겔화 응집되는 것으로 생각된다. 또한 이때, 탄화물등의 고형물은 침전물이 되어서 용기 저부에 침강하므로, 용이하게 모액에서 분리된다. 따라서 그 모액은 제1의 방법에 있어서와 같이 여러가지의 용도로 반복 사용할 수 있다. 다음에 P.V.A를 함유한 폐수에 유기물로서 P.V.A 외에 전분류가 혼입되어 있는 일이 있다. 따라서 본 발명의 제3의 발명은 상기한 제1 또는 제2의 발명에 의하여 P.V.A를 회수한 모액을 중성으로 하고 효소 발호제를 0.1~0.2% 첨가하여 70℃ 이상으로 5~15분간 치리하여서 전분류를 당화시키거나, 또는 산을 사용하여서 가수분해하는 것이다. 탄화물등의 고형 불순물이 존재할 경우는 당화치리 하기전 또는 후에 제거할 수가 있다. 이것에 의하여 P.V.A 회수 모액을 예를들면 직물의 발호에 이용할 경우에 있어서의 전분류의 존재에 의한 장해가 방지된다. 즉, 폐수중의 유기물이 P.V.A 단독의 경우와 동일한 응집제의 소용량으로 목적을 달성한다. 전분류를 당화시켜서 점도를 저하시키지 않을 때에는 연속 사용중에 전분류가 축적되어서 낙호를 방해할 뿐 아니라, 그 폐수에서 P.V.A를 회수함에 있어서 발포가 심하여 응집분리하기가 곤란하게 된다.In order to remedy such drawbacks and recover high purity PVA boric acid compounds, in the second invention of the present invention, boric acid or borax and inorganic dyes such as manganese sulfate and ammonium sulfate are added to the wastewater to reduce the pH to 70 as PH 4-7. After heating to more than C, by cooling the pH to room temperature adjusted to 8 to 10, the colorless and high purity PVA boric acid compound is separated and recovered without containing carbide and unnecessary salts. Even when the wastewater contains only P.V.A, there is an advantage that the salt content of the obtained P.V.A boric acid compound is reduced. It is considered that P.V.A is sufficiently peptized by heating from mild acid to high temperature, and P.V.A is gelled to high purity without absorbing solids such as boric acid compounds and excess salts in cooling. At this time, solids such as carbides become precipitates and settle at the bottom of the container, and are easily separated from the mother liquor. Therefore, the mother liquor can be used repeatedly for various purposes as in the first method. Next, starch may be mixed with P.V.A in addition to P.V.A as an organic substance in wastewater containing P.V.A. Therefore, in the third invention of the present invention, the mother liquor from which the PVA is recovered according to the first or second invention described above is neutralized, and 0.1 to 0.2% of an enzyme inhibitor is added, followed by 5-15 minutes at 70 ° C. or higher. Glycosylation or hydrolysis with acid. If solid impurities such as carbides are present, they can be removed before or after saccharification. This prevents the obstacle due to the presence of starch when the P.V.A recovered mother liquor is used, for example, for the fabrication of fabrics. In other words, the organic matter in the waste water achieves the object with a small amount of the same flocculant as in the case of P.V.A alone. When the starch is not saccharified and the viscosity is not lowered, the starch accumulates during continuous use and prevents dropping, and it is difficult to coagulate and segregate the P.V.A in recovering P.V.A from the wastewater.
상술한 바와 같이 본 발명에 의한 회수 P.V.A 붕산화합물은 널리 P.V.A로서의 적당한 용도에 이용할 수 있지만, 이것을 작물의 호부(糊付)에 있어서의 인공호로서 이용할 경우는 붕산분의 영향을 고려할 필요가 있다. 따라서 본 발명에 있어서는 이 경우의 가공온도를 일반적인 경우보다 높이고, PH를 4~8로 조정하여 70℃ 이상에서 발호를 정한다. 이것에 의하여 새로운 P.V.A의 경우와 동일한 효과를 가져올 수가 있다.As described above, the recovered P.V.A boric acid compound according to the present invention can be widely used for a suitable use as P.V.A. However, when it is used as an artificial arc in crops, it is necessary to consider the effect of boric acid powder. Therefore, in the present invention, the processing temperature in this case is higher than usual, and the pH is adjusted to 4 to 8 to determine the firing at 70 ° C or higher. This can bring about the same effect as in the case of the new P.V.A.
[실시예 1]Example 1
P.V.A(평균중합도 1700, 감화도(감化度) 88%) 0.80%를 함유한 폐수에 붕사 0.12%, 망초 0.9%를 가하고 소석회로 PH 9로 하고 실온으로 10분간 교반 처리하여 P.V.A를 붕산화합물로서 응집 분리하였다. 건조후의 조성을 P.V.A 80.2%, 붕산(B로서) 10.3%CaO 0.20%이었다. 모액을 PH 7로 하고 효소발호제 「비오텍스」(나가세산업제(長가産業製)) 0.12%를 첨가하여서 T/C 브로우드를 97~100℃로서 발호한바, 수도물에서의 발호효과와 동일하였다. 그 발호처리 폐수에 붕사 0.05%, 망초 0.3%를 첨가하고 소석회로 PH 9로 하여서 실온으로 15분간 처리한 결과 제1회째와 같이 P.V.A 붕산화합물이 응집분리되었다.To wastewater containing 0.80% of PVA (average degree of polymerization 1700, 88%), 0.12% of borax and 0.9% of forget-me-not were added to the calcined circuit as
[실시예 2]Example 2
P.V.A 0.75%, 전분 0.4%를 함유한 T/C 브로우드 발호 처리폐수에 붕산 0.12%, 황산암모늄 0.7%를 가하고 약 98℃로 30초간 열처리한 후,소석회로 PH 8로 하여서 실온으로 냉각시켜서, 무착색의 P.V.A를 붕산화합물로서 응집 회수하였다. 건조후의 조성은 P.V.A 83,7%, 붕산 (B로서) 12.4%, CaO 0.04% 전분 0.09%이고 탄화물등의 불순물의 존재는 거의 볼 수 없었다.0.12% boric acid and 0.7% ammonium sulfate were added to a T / C brood-treated wastewater containing 0.75% PVA and 0.4% starch, heat-treated at about 98 ° C for 30 seconds, and cooled to room temperature with a calcination circuit of
[실시예 3]Example 3
실시예 2에 있어서의 모액을 방치하여서 침전물을 제거한 후, 효소 발호제 비오텍스 0.1%를 첨가하여 PH 7에서 80℃로 10분간 가열하여서 전분류를 당화시켰다. 모액중의 전분의 농도는 0.06%로 감소되었다. 이 모액을 사용하는 직물의 발호효과는 실시예 1에 있어서와 동일하였다.After leaving the mother liquor in Example 2 to remove the precipitate, 0.1% of the enzyme inhibitor biotex was added, and the starch was saccharified by heating at 80 DEG C for 10 minutes at
[실시예 4]Example 4
실시예 2의 모액에 2g/ℓ의 농황산을 첨가하여 5분간 끓여서 전분류를 가수분해하여, 침전물을 제거한바 모액의 전분농도는 0.05%로 감소하였다.2 g / L of concentrated sulfuric acid was added to the mother liquor of Example 2 to boil for 5 minutes to hydrolyze the starch, and when the precipitate was removed, the starch concentration of the mother liquor decreased to 0.05%.
[실시예 5]Example 5
실시예 2에서 회수된 P.V.A 붕산화합물 60%, 전분호 40%로 된 호제를 사용하여서 80℃에서 직포의 호부가공을 행하였다. 결과는 시판의 호제에 의한 50℃에 있어서의 가공과 동일하며, 제품의 사절(絲切)테스트는 다음과 같았다.Using a foaming agent made of 60% P.V.A boric acid compound recovered in Example 2 and 40% of starch, the woven processing of the woven fabric was performed at 80 ° C. The result was the same as the process at 50 degreeC by commercially available arc, and the thread trimming test of the product was as follows.
회수 P.V.A A제품 B제품Collection P.V.A A Product B Product
45단사 T65/C36사절수 2664 3231 147045 single thread T 65 / C 36 number of rounds 2664 3231 1470
100% 테트론 사절수 3506 4800 2557100% Tetron Cutoff 3506 4800 2557
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| Application Number | Priority Date | Filing Date | Title |
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| KR7601294A KR810000769B1 (en) | 1976-05-26 | 1976-05-26 | Method of treating wastewater containing polyvinyl alcohol |
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| KR7601294A KR810000769B1 (en) | 1976-05-26 | 1976-05-26 | Method of treating wastewater containing polyvinyl alcohol |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100783754B1 (en) * | 2006-12-14 | 2007-12-07 | (주) 테크윈 | Chemical and biological treatment method of wastewater containing PPA and its device |
| CN102363543A (en) * | 2011-09-15 | 2012-02-29 | 桐乡市健民过滤材料有限公司 | Method for processing wastewater with high content polyvinyl alcohol |
| CN105016573A (en) * | 2015-06-30 | 2015-11-04 | 南京工业大学 | Method for treating neutral wastewater containing dye and PVA (polyvinyl alcohol) by using UV (ultraviolet) synergistic complexing/Fenton system |
-
1976
- 1976-05-26 KR KR7601294A patent/KR810000769B1/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100783754B1 (en) * | 2006-12-14 | 2007-12-07 | (주) 테크윈 | Chemical and biological treatment method of wastewater containing PPA and its device |
| CN102363543A (en) * | 2011-09-15 | 2012-02-29 | 桐乡市健民过滤材料有限公司 | Method for processing wastewater with high content polyvinyl alcohol |
| CN105016573A (en) * | 2015-06-30 | 2015-11-04 | 南京工业大学 | Method for treating neutral wastewater containing dye and PVA (polyvinyl alcohol) by using UV (ultraviolet) synergistic complexing/Fenton system |
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