JP6461408B1 - 水処理方法および水処理装置 - Google Patents
水処理方法および水処理装置 Download PDFInfo
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- 230000001590 oxidative effect Effects 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
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- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
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- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000005276 aerator Methods 0.000 description 1
- 230000004520 agglutination Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 description 1
- 239000011609 ammonium molybdate Substances 0.000 description 1
- 235000018660 ammonium molybdate Nutrition 0.000 description 1
- 229940010552 ammonium molybdate Drugs 0.000 description 1
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- 238000011001 backwashing Methods 0.000 description 1
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
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- 238000003795 desorption Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 235000020774 essential nutrients Nutrition 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000004949 mass spectrometry Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 235000021048 nutrient requirements Nutrition 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/305—Nitrification and denitrification treatment characterised by the denitrification
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2806—Anaerobic processes using solid supports for microorganisms
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/163—Nitrates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/166—Nitrites
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
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- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
【解決手段】被処理水を生物処理槽10に通水し、水素供与体の存在下で脱窒菌により脱窒処理する脱窒工程を少なくとも含み、被処理水中に0.01〜1.0mgMo/gNのモリブデンを存在させる、水処理方法である。
【選択図】図1
Description
図2に示す、担体法による水処理装置を用いて模擬排水の脱窒試験を実施した。
生物処理槽容積:1.4L
微生物保持用担体:ポリビニルアルコールゲル状担体(球状、直径4mm)
担体充填率:20%、40%、60%(担体かさ容量/槽容量)
供試水:井水に硝酸ナトリウムを硝酸態窒素濃度300mg/L相当量添加し、その他リン酸および微量元素溶液を添加したものを模擬排水とした。なお、本試験に用いた微量元素溶液にはモリブデン、ニッケル、コバルトが含まないものを用いた。なお、模擬排水のモリブデン、ニッケル、コバルトの各含有濃度は0.0001mg/L未満であった。模擬排水の微量元素濃度を表2に示す。微量元素の濃度は、ICP質量分析法(ICP−MS)を用いて測定した。
水素供与体:メタノール
種汚泥:メタノールで馴養された脱窒汚泥をMLSS濃度として1000mg/L分添加
図4に、充填率20%の結果を、図5に、充填率40%の結果を、図6に、充填率60%の結果を示す。
T−N(全窒素)容積負荷として、充填率20%は0.3kgN/(m3−槽容積・d)、充填率40%は0.5kgN/(m3−槽容積・d)、充填率60%は0.6kgN/(m3−槽容積・d)で通水を開始した。充填率20%と充填率40%は、T−N容積負荷として約1.0kgN/(m3−槽容積・d)、充填率60%は、約1.3kgN/(m3−槽容積・d)まで負荷を上昇させたが、T−N除去率は低下傾向にあり、処理性能が安定しなかった。この間の最大T−N除去速度として、充填率20%は0.33kgN/(m3−槽容積・d)、充填率40%は0.59kgN/(m3−槽容積・d)、充填率60%は1.00kgN/(m3−槽容積・d)に留まった。
その後、充填率20%は86日目から、充填率40%と60%は143日目からモリブデン、ニッケル、コバルトを模擬排水中の含有濃度として、それぞれ0.257mgMo/L、0.220mgNi/L、0.216mgCo/Lとなるようにモリブデン化合物、ニッケル化合物、コバルト化合物をそれぞれ添加し、通水を継続した。被処理水の窒素濃度に対する比率として、0.857mgMo/gN、0.733mgNi/gN、0.720mgCo/gNの条件である。
実施例1の充填率40%の試験において、モリブデン、ニッケル、コバルトの添加を停止し、連続通水を継続した(模擬排水中のモリブデン、ニッケル、コバルトの各含有濃度は0.0001mg/L未満)。その後、T−N除去速度が半分程度まで低下したことを確認し、モリブデン化合物を含有濃度として0.0075mgMo/Lとなるように添加した。なお、被処理水の窒素濃度に対する比率として、0.025mgMo/gNの条件である。結果を図7に示す。
実施例1の充填率60%の試験において、モリブデン、ニッケル、コバルトの添加を停止し、連続通水を継続した(模擬排水中のモリブデン、ニッケル、コバルトの各含有濃度は0.0001mg/L未満)。その後、T−N除去速度が3割程度まで低下したことを確認し、モリブデン添加量の影響を確認するため、モリブデン化合物を含有濃度として0.004mgMo/L、0.0075mgMo/L、0.257mgMo/Lとなるように添加して比較した。なお、被処理水窒素濃度に対する比率として、0.013mgMo/gN、0.025mgMo/gN、0.857mgMo/gNの条件である。結果を図8に示す。なお、図8の0.857mgMo/gNにおけるT−N容積負荷8kgN/(m3−槽容積・d)以下の数値は実施例1の結果である。
Claims (4)
- 被処理水を生物処理槽に通水し、水素供与体の存在下で従属栄養性の脱窒菌により脱窒処理する脱窒工程を少なくとも含み、
前記被処理水中に0.01〜1.0mgMo/gNのモリブデンを存在させ、
前記生物処理槽に担体を添加し、前記担体に対する窒素負荷を、1.6kgN/(m 3 −担体・d)以上とすることを特徴とする水処理方法。 - 請求項1に記載の水処理方法であって、
前記被処理水中のモリブデン含有量を前記生物処理槽における窒素負荷に応じて変化させることを特徴とする水処理方法。 - 被処理水を生物処理槽に通水し、水素供与体の存在下で従属栄養性の脱窒菌により脱窒処理する脱窒手段を少なくとも備え、
前記被処理水中に0.01〜1.0mgMo/gNのモリブデンを存在させ、
前記生物処理槽に担体を添加し、前記担体に対する窒素負荷を、1.6kgN/(m 3 −担体・d)以上とすることを特徴とする水処理装置。 - 請求項3に記載の水処理装置であって、
前記被処理水中のモリブデン含有量を前記生物処理槽における窒素負荷に応じて変化させることを特徴とする水処理装置。
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PCT/JP2019/024447 WO2019244969A1 (ja) | 2018-06-22 | 2019-06-20 | 水処理方法および水処理装置 |
CN201980041820.6A CN112313180A (zh) | 2018-06-22 | 2019-06-20 | 水处理方法和水处理装置 |
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JP2004074111A (ja) * | 2002-08-22 | 2004-03-11 | Kurita Water Ind Ltd | 排液処理方法 |
JP2006272287A (ja) * | 2005-03-30 | 2006-10-12 | Aw Service:Kk | 排水処理方法 |
JP2010253352A (ja) * | 2009-04-22 | 2010-11-11 | Kurita Water Ind Ltd | 脱窒方法 |
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US6019900A (en) * | 1998-08-03 | 2000-02-01 | The Regents Of The University Of California | Single stage denitrification anaerobic digestion |
US7537698B2 (en) * | 2005-02-28 | 2009-05-26 | Hitachi Plant Technologies, Ltd. | Process and equipment for treating ammonium containing liquid |
JP5149717B2 (ja) | 2008-07-03 | 2013-02-20 | オルガノ株式会社 | 脱窒処理方法及び脱窒処理装置 |
JP5636236B2 (ja) | 2010-09-21 | 2014-12-03 | Dowaテクノロジー株式会社 | 硝酸含有水の処理方法及び硝酸含有水の処理装置 |
US20140367333A1 (en) * | 2013-06-14 | 2014-12-18 | Microvi Biotech Inc. | Novel biocatalyst compositions and processes for use |
KR101831900B1 (ko) | 2016-05-24 | 2018-04-13 | 영남대학교 산학협력단 | 폐수 내 질소 제거 방법 |
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