JP5208599B2 - 硝酸性窒素含有地下水の浄化方法 - Google Patents
硝酸性窒素含有地下水の浄化方法 Download PDFInfo
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- JP5208599B2 JP5208599B2 JP2008176403A JP2008176403A JP5208599B2 JP 5208599 B2 JP5208599 B2 JP 5208599B2 JP 2008176403 A JP2008176403 A JP 2008176403A JP 2008176403 A JP2008176403 A JP 2008176403A JP 5208599 B2 JP5208599 B2 JP 5208599B2
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- groundwater
- sulfur
- nitrogen
- wall
- nitrate nitrogen
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- 239000003673 groundwater Substances 0.000 title claims description 43
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 title claims description 26
- 238000000746 purification Methods 0.000 title claims description 20
- 238000000034 method Methods 0.000 claims description 29
- 239000011593 sulfur Substances 0.000 claims description 29
- 229910052717 sulfur Inorganic materials 0.000 claims description 29
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 28
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 23
- 241000894006 Bacteria Species 0.000 claims description 21
- 239000002245 particle Substances 0.000 claims description 21
- 239000004575 stone Substances 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 11
- 239000007789 gas Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 10
- 230000001788 irregular Effects 0.000 claims description 10
- 230000001590 oxidative effect Effects 0.000 claims description 10
- 239000010802 sludge Substances 0.000 claims description 7
- JGIATAMCQXIDNZ-UHFFFAOYSA-N calcium sulfide Chemical compound [Ca]=S JGIATAMCQXIDNZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910002651 NO3 Inorganic materials 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 238000007872 degassing Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 14
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 239000011575 calcium Substances 0.000 description 3
- 229910001576 calcium mineral Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 230000020477 pH reduction Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 241000233866 Fungi Species 0.000 description 1
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 1
- 241001509286 Thiobacillus denitrificans Species 0.000 description 1
- VGPSUIRIPDYGFV-UHFFFAOYSA-N [N].O[N+]([O-])=O Chemical compound [N].O[N+]([O-])=O VGPSUIRIPDYGFV-UHFFFAOYSA-N 0.000 description 1
- 230000001651 autotrophic effect Effects 0.000 description 1
- 229920000704 biodegradable plastic Polymers 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
- 230000004720 fertilization Effects 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 238000003895 groundwater pollution Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 244000144972 livestock Species 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 150000003463 sulfur Chemical class 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012795 verification Methods 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
Landscapes
- Biological Treatment Of Waste Water (AREA)
- Degasification And Air Bubble Elimination (AREA)
- Treatment Of Biological Wastes In General (AREA)
- Physical Water Treatments (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Description
・ 水処理プラントを用いる方法は、汚泥処理の問題やコスト面で問題がある。
・ 透過壁の形成方法や材料について十分な検討がなされておらず、実際の地下水に適用できる方法や材料が不明である。
・ 汚染サイトで浄化する場合、透過壁内にある程度間隙を有していないとガス溜りが発生して地下水と透過壁の接触を阻害し、浄化効率が低下する。
(2)前記パイプの中に汚泥を供給することを特徴とする(1)に記載の硝酸性窒素含有地下水の浄化方法。
1.06NO3-+1.11S+0.3CO2+0.785H2O→0.5N2+1.11SO42-+1.16H++0.06C5H7O2N
図2は、本発明に用いる硫黄酸化脱窒細菌を例示する図である。
・ 脱窒反応で、硫黄系無機質剤が溶出して体積が微減することもあるが、強固な砕石を有することにより、透過壁内での荷崩れを防止することができ、長期にわたって透過壁内の間隙を確保することができる。
・ 砕石混合により間隙が安定的に確保できるので、窒素ガスおよび汚泥を排出し易くすることができる。
<実施条件>
・ 硫黄カルシウム系無機質剤の粒径:1〜50mm
・ 砕石の粒径:1〜100mm
・ 砕石の混合率:10〜90%
・ 透過壁の幅:3m
・ 透過壁の深さ:6m
・ スクリーン井戸:3本、深さ1.5m
・ モニタリング井戸:地下水の入側、出側各1本
2 掘削機
3 透過壁
4 スクリーン井戸
5、5´モニタリング井戸
Claims (2)
- 硫黄カルシウム系無機質剤であって粒径が1〜50mmの不定形濾材と、粒径が1〜100mmの不定形砕石とを質量比で10〜90:90〜10で混合して荷崩れを防止した透過壁を形成し、硝酸性窒素を含有する地下水層に該透過壁を埋設することにより、前記硝酸性窒素を含有する地下水を透過壁に通過させ、該透過壁中の硫黄酸化脱窒菌により地下水中の硝酸イオン(NO3-)を取り込んで窒素分を無害な窒素ガス(N2)として排出する生物学的脱窒反応に基づいて硝酸性窒素に汚染された地下水を無害化する浄化方法であって、前記透過壁中または透過壁の周辺に端部が開放されたパイプを埋設して、該端部が開放されたパイプ中に水、水溶液、または、ガスを供給して、前記地下水から発生する窒素ガスを脱気することを特徴とする硝酸性窒素含有地下水の浄化方法。
- 前記パイプの中に汚泥を供給することを特徴とする請求項1に記載の硝酸性窒素含有地下水の浄化方法。
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JP5208599B2 true JP5208599B2 (ja) | 2013-06-12 |
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Families Citing this family (2)
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JP2018171616A (ja) * | 2017-03-31 | 2018-11-08 | 新日鉄住金エンジニアリング株式会社 | 地下水浄化方法および地下構造物 |
CN108913623A (zh) * | 2018-07-23 | 2018-11-30 | 中国地质大学(北京) | 一种硫自养反硝化菌固定化颗粒的制备方法 |
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JP4625552B2 (ja) * | 1999-03-08 | 2011-02-02 | 大成建設株式会社 | 地下水の浄化方法 |
JP3452526B2 (ja) * | 2000-03-27 | 2003-09-29 | 株式会社ナラタ | 有害ガス除去装置及び方法 |
JP4608851B2 (ja) * | 2003-06-10 | 2011-01-12 | 株式会社大林組 | 水質浄化構造の構築方法 |
JP4140031B2 (ja) * | 2003-06-17 | 2008-08-27 | 株式会社大林組 | 水質浄化性地下ダム及びその構築方法 |
JP5211427B2 (ja) * | 2006-02-03 | 2013-06-12 | 栗田工業株式会社 | 地下水の浄化方法 |
JP2007245022A (ja) * | 2006-03-16 | 2007-09-27 | Nippon Steel Chem Co Ltd | 硝酸性窒素による地下水汚染を防止する方法。 |
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