JP4164431B2 - 凝集剤 - Google Patents
凝集剤 Download PDFInfo
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- JP4164431B2 JP4164431B2 JP2003356776A JP2003356776A JP4164431B2 JP 4164431 B2 JP4164431 B2 JP 4164431B2 JP 2003356776 A JP2003356776 A JP 2003356776A JP 2003356776 A JP2003356776 A JP 2003356776A JP 4164431 B2 JP4164431 B2 JP 4164431B2
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- JP
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- Prior art keywords
- flocculant
- weight
- water
- aluminum sulfate
- acid
- Prior art date
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 21
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 11
- 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 claims description 10
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 10
- 150000007524 organic acids Chemical class 0.000 claims description 8
- 229920002401 polyacrylamide Polymers 0.000 claims description 8
- 230000004931 aggregating effect Effects 0.000 claims description 7
- GRLPQNLYRHEGIJ-UHFFFAOYSA-J potassium aluminium sulfate Chemical compound [Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRLPQNLYRHEGIJ-UHFFFAOYSA-J 0.000 claims description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- 238000005345 coagulation Methods 0.000 claims description 6
- 230000015271 coagulation Effects 0.000 claims description 6
- 229920000642 polymer Polymers 0.000 claims description 5
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 claims description 4
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 claims description 4
- 239000001630 malic acid Substances 0.000 claims description 4
- 235000011090 malic acid Nutrition 0.000 claims description 4
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 150000002148 esters Chemical class 0.000 claims description 3
- 238000006467 substitution reaction Methods 0.000 claims description 3
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 claims description 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 2
- 229920002125 Sokalan® Polymers 0.000 claims description 2
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 2
- 235000011054 acetic acid Nutrition 0.000 claims description 2
- 238000000975 co-precipitation Methods 0.000 claims description 2
- 239000004584 polyacrylic acid Substances 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- 229940047670 sodium acrylate Drugs 0.000 claims description 2
- 239000011975 tartaric acid Substances 0.000 claims description 2
- 235000002906 tartaric acid Nutrition 0.000 claims description 2
- 239000010802 sludge Substances 0.000 description 20
- 239000007787 solid Substances 0.000 description 17
- 239000002351 wastewater Substances 0.000 description 11
- 238000002835 absorbance Methods 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 8
- 235000017550 sodium carbonate Nutrition 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 238000004220 aggregation Methods 0.000 description 6
- 230000002776 aggregation Effects 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 239000008394 flocculating agent Substances 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 5
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 239000006228 supernatant Substances 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- 239000004305 biphenyl Substances 0.000 description 4
- 235000010290 biphenyl Nutrition 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910001385 heavy metal Inorganic materials 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000011324 bead Substances 0.000 description 3
- 125000006267 biphenyl group Chemical group 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000010979 pH adjustment Methods 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 241000238557 Decapoda Species 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- -1 aluminum sulfate Chemical class 0.000 description 2
- 125000000129 anionic group Chemical group 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 235000011116 calcium hydroxide Nutrition 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 235000012255 calcium oxide Nutrition 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 150000001804 chlorine Chemical class 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 230000001112 coagulating effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 150000002505 iron Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241000195628 Chlorophyta Species 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- 241000276569 Oryzias latipes Species 0.000 description 1
- 208000012868 Overgrowth Diseases 0.000 description 1
- 241000907645 Sicyonia ingentis Species 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- VEUACKUBDLVUAC-UHFFFAOYSA-N [Na].[Ca] Chemical compound [Na].[Ca] VEUACKUBDLVUAC-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000004520 agglutination Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- YZZLMBKUNUISAE-UHFFFAOYSA-J aluminum;sodium;carbonate;sulfate Chemical compound [Na+].[Al+3].[O-]C([O-])=O.[O-]S([O-])(=O)=O YZZLMBKUNUISAE-UHFFFAOYSA-J 0.000 description 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000013011 aqueous formulation Substances 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 239000003653 coastal water Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical group O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 description 1
- 150000002506 iron compounds Chemical class 0.000 description 1
- 229910000358 iron sulfate Inorganic materials 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 1
- 150000004692 metal hydroxides Chemical class 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- GPRIERYVMZVKTC-UHFFFAOYSA-N p-quaterphenyl Chemical group C1=CC=CC=C1C1=CC=C(C=2C=CC(=CC=2)C=2C=CC=CC=2)C=C1 GPRIERYVMZVKTC-UHFFFAOYSA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000010413 sodium alginate Nutrition 0.000 description 1
- 239000000661 sodium alginate Substances 0.000 description 1
- 229940005550 sodium alginate Drugs 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Description
本発明1の凝集剤は、還元能と錯体置換能(ジフェニル反応)を有する天然有機酸(R-COOH)、凝集作用・共沈作用を行う硫酸アルミニウム〔Al2(SO4)3、硫酸カリウムアルミニウム〔AlK(SO4)2〕、及び炭酸ナトリウム(Na2CO3)、フロック粗大作用と脱水向上作用を行うポリアクリルアミド、アクリル酸ナトリウム、ポリアクリル酸エステルから選択される1種以上の高分子物質から成ることを特徴とする。
前記高分子物質で最も効果的なものは、アニオン性(陰イオン)のポリアクリルアミドが良い。なお、前記錯体置換能(ジフェニル反応)とは、天然有機酸がエステル、塩化物、アミド等の誘導体になる反応を意味する。
本発明の処理剤中で、天然有機酸のジフェニル(ビフェニル)反応は重要である。含有量は1〜5重量%で、好ましくは2〜3重量%が最適である。アルミニウム塩は、硫酸カリウムアルミニウム〔AlK(SO4)2〕と硫酸アルミニウム〔Al2(SO4)3〕が使用される。硫酸カリウムアルミニウムは5〜20重量%で、好ましくは5〜10重量%。また、硫酸アルミニウム〔Al2(SO4)3〕は、40〜55重量%で、好ましくは45〜50重量%。少なすぎると塩基の発生が無くなり、沈降作用が発揮しにくくなる。多すぎると塩基の過電位になり、凝集力が弱くなり、アルミニウムイオンが生成される。
炭酸ナトリウム(NaCO3)は10〜30重量%で、好ましくは15〜20重量%が良い。10重量%以下では、ナトリウム塩カルシウム塩が少なく沈降速度が遅くなる。炭酸ナトリウムが30重量%を超えると、中和作用が過状になり、pHが上昇する。工業用として使用されているソーダ灰がコスト等の点で好ましい。
ポリアクリルアミドは、アクリルアミドを基体とした水溶性の白色高分子であり、水性配合物の増粘剤、沈殿防止剤等に用いられるものである。ポリアクリルアミドは、アミド基(-NH2)による水素結合、カルボキシル基(-COO-)によるイオン結合により金属水酸化物・金属イオンと反応して凝集が行われる。無機凝集剤によってフロック(流体内の微細懸濁粒子が、凝析、凝集、生化学反応によって小さい塊状となったもの。)生成された粒子を架橋して粗大フロックが生成される。このため、凝集力が高くなり脱水効果を向上させる。
上記各成分の具体的な配合は、処理する排水中に含まれる重金属類、または溶剤、キレート、アルコール類、無機物質、有機物質等の量により、上記範囲内で適宜調整する。本発明の処理剤は、水に凝集剤を溶解させて使用する。この混合割合は、水に対して凝集剤の割合が0.1〜0.3%の割合で溶解させる。上記のような各成分を、混合機で混合する事により調整する。例えばロッキングミキサー、セメントミキサー等々の紛体混合機に上記各成分の原料を所定量と色素玉(大、中、小ビーズ)と共に投入し、撹拌混合して、上部、中部、下部を各1kgづつ取り出し、色素玉(ビーズ)の均一分散により、各成分の均一化を確認した上で、振い等を用いて、処理剤混合物から、色素玉(ビーズ)を除去する。
[表1] 凝集剤の組成
成分(凝集剤の組成) 含有量
硫酸アルミニウム 46%
炭酸ナトリウム 32%
硫酸カリウムアルミニウム 8%
ポリアクリルアミド 12%
リンゴ酸 2%
Claims (4)
- 還元能と錯体置換能を有する天然有機酸(R-COOH)、凝集作用・共沈作用を行う硫酸アルミニウム〔Al2(SO4)3、及び硫酸カリウムアルミニウム〔AlK(SO4)2〕、中和するための炭酸ナトリウム(Na2CO3)、フロック粗大作用と脱水向上作用を行うポリアクリルアミド、アクリル酸ナトリウム、ポリアクリル酸エステルから選択される1種以上の高分子物質とからなることを特徴とする凝集剤。
- 請求項1に記載の凝集剤において、
前記硫酸アルミニウムの含有量が40〜50重量%、前記天然有機酸が1〜5重量%、前記硫酸カリウムアルミニウムが5〜15重量%、前記炭酸ナトリウムが20〜40重量%、前記高分子物質を10〜20重量%含むことを特徴とする凝集剤。 - 請求項1又は2に記載の凝集剤において、
前記天然有機酸は、リンゴ酸、酢酸、酒石酸から選択される1種以上であることを特徴とする凝集剤。 - 請求項1又は2に記載の凝集剤において、
前記凝集剤が予め水に溶解されたものであることを特徴とする凝集剤。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2003356776A JP4164431B2 (ja) | 2003-10-16 | 2003-10-16 | 凝集剤 |
Applications Claiming Priority (1)
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JP2003356776A JP4164431B2 (ja) | 2003-10-16 | 2003-10-16 | 凝集剤 |
Publications (2)
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JP2005118675A JP2005118675A (ja) | 2005-05-12 |
JP4164431B2 true JP4164431B2 (ja) | 2008-10-15 |
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JP2003356776A Expired - Lifetime JP4164431B2 (ja) | 2003-10-16 | 2003-10-16 | 凝集剤 |
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Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101543551B1 (ko) * | 2015-04-29 | 2015-08-10 | 주식회사 케이엔씨 | 전기분해를 이용한 하·폐수처리시스템 |
JP6242436B1 (ja) * | 2016-06-07 | 2017-12-06 | 有限会社日向栄進産業 | 養豚糞尿混合排水処理方法及び循環型養豚糞尿混合排水処理システム |
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2003
- 2003-10-16 JP JP2003356776A patent/JP4164431B2/ja not_active Expired - Lifetime
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