WO2013146853A1 - Procédé de traitement d'eaux usées contenant des graisses - Google Patents

Procédé de traitement d'eaux usées contenant des graisses Download PDF

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Publication number
WO2013146853A1
WO2013146853A1 PCT/JP2013/058932 JP2013058932W WO2013146853A1 WO 2013146853 A1 WO2013146853 A1 WO 2013146853A1 JP 2013058932 W JP2013058932 W JP 2013058932W WO 2013146853 A1 WO2013146853 A1 WO 2013146853A1
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WO
WIPO (PCT)
Prior art keywords
fat
containing wastewater
oil
tank
wastewater
Prior art date
Application number
PCT/JP2013/058932
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English (en)
Japanese (ja)
Inventor
孝明 徳富
秀彰 進藤
Original Assignee
栗田工業株式会社
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Filing date
Publication date
Application filed by 栗田工業株式会社 filed Critical 栗田工業株式会社
Publication of WO2013146853A1 publication Critical patent/WO2013146853A1/fr

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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
    • 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
    • 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
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/32—Hydrocarbons, e.g. oil
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/001—Upstream control, i.e. monitoring for predictive control
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/06—Controlling or monitoring parameters in water treatment pH
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/12—Prevention of foaming
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel

Definitions

  • the present invention relates to a method for treating fat and oil containing wastewater such as food factory wastewater.
  • this oil-containing sludge is treated with an adsorbent to adsorb fat and oil onto the adsorbent, and then dehydrated and discarded.
  • the oil-containing sludge contains undecomposed organic matter, generation of odor is also a problem.
  • the generated dewatered sludge is conventionally disposed of by landfill or incineration, but due to the generation of harmful substances at the time of incineration or the shortage of landfill sites, an increase in disposal cost is also a problem.
  • Japanese Patent Application Laid-Open No. 6-246295 proposes a method of anaerobic treatment after adding lipase to fat and oil containing waste water to decompose the fat and oil.
  • a function of lipase an action of hydrolyzing fats and oils to glycerin and higher fatty acid by lipase and an action of converting the produced higher fatty acid to lower fatty acid by highly efficient ⁇ oxidation are known.
  • Methane fermentation that is, anaerobic digestion, has many advantages such as stabilization of organic matter, reduction of sludge, energy recovery, reduction of aeration costs, etc.
  • Sometimes used in processing Japanese Patent Laid-Open Nos. 57-117380 and 2001-321792.
  • Japanese Patent Application Laid-Open No. 2001-321792 discloses a method for efficiently treating oil-containing wastewater by mixing surplus sludge generated from a subsequent aerobic treatment tank with oil-containing wastewater, and subjecting the wastewater to methane fermentation as it is. Has been proposed.
  • 2001-321792 describes that in this treatment, the treatment performance is improved by adding lipase, introducing a microorganism-supporting carrier, or adding microorganisms to alleviate inhibition of higher fatty acids.
  • the oil and fat scum and float the oil and oil adheres to the granule, the granule floats, and the wastewater containing fat and oil is difficult to be microbially decomposed. There is a possibility of causing problems such as inhibiting microbial activity or remaining in the treated water without being decomposed in the biological treatment process.
  • the present invention purifies oil-containing wastewater with high efficiency, efficiently recovers methane from the organic components in the wastewater, further stabilizes the methane fermentation treatment, improves treatment efficiency, downsizes the methane fermentation tank, contains fats and oils It is an object of the present invention to provide a method for treating fat and oil containing wastewater that can improve the separation efficiency of fat and oil from wastewater and reduce the amount of generated sludge.
  • the method for treating oil-containing wastewater according to the present invention is characterized in that the oil-containing wastewater is subjected to an acid generation reaction under alkaline conditions without separating the oil and the wastewater, and then subjected to a methane formation reaction under alkaline conditions. Is.
  • the oil and fat content of the fat and oil-containing wastewater is not separated by pretreatment, and acid generation is performed as it is under alkaline conditions, and then the methane formation reaction is performed under alkaline conditions, so that anaerobic treatment can be performed with high efficiency.
  • the fat-and-oil wastewater to be treated contains animal and vegetable fats and oils and fat-containing wastewater having an n-hexane extract concentration of 100 mg / L or more, more preferably 100 to 1000 mg / L. It is.
  • n-Hex an n-hexane extract
  • the pH of the acid generation tank is preferably 8 to 12, particularly 8 to 9, particularly 8.5 to 9.0.
  • the pH of the acid generation tank is preferably 8 to 12, particularly 8 to 9, particularly 8.5 to 9.0.
  • the higher the pH the higher the effect.
  • the chemical cost for increasing the pH increases, so it is economical to control at around pH 8.5 to 9.0. Is.
  • the temperature of the acid generation tank is preferably 20 to 40 ° C., particularly 25 to 35 ° C., and the HRT is preferably 2 to 24 hours, particularly 2 to 8 hours.
  • BOD volume load of this acid generation tank is set to 1 kg / m 3 / d or more, for example, 1 to 20 kg / m 3 / d, and the above HRT is used to decompose the oil and fat components into an organic acid such as acetic acid. Can be obtained. Moreover, by performing the treatment under alkaline conditions, there is an effect of solubilizing a part of the fat and oil and facilitating the microbial reaction.
  • the pH of the solution in the acid generation tank is measured continuously or intermittently, and sodium hydroxide, A method of adding an alkaline component such as calcium or calcium carbonate is preferred.
  • the treated water for anaerobic treatment may be aerated and the pH may be raised by decarboxylation to return the water to be used as an alkali.
  • the pKa of the fatty acid is a weak alkaline region of about 8 or so, it exists as a water-insoluble free fatty acid in the neutral region or acidic region, and the degradability by microorganisms deteriorates. For this reason, fat components having a light specific gravity accumulate near the water surface, and scum mainly composed of fatty acids is generated.
  • microorganism preparations In order to maintain the amount of microorganisms in the acid generation tank, commercially available microorganism preparations, cultures thereof or activated sludge may be appropriately added.
  • fat-degrading bacteria for example, fat-degrading bacteria, fat-degrading fungi, lipase and other fat-degrading enzymes, surfactants, etc. may be added separately, and mechanical stirring, etc.
  • the oil dispersion may be promoted.
  • the polymer component In the acid generation tank, the polymer component is converted into an organic acid, and dispersed cells are generated. Even if the dispersed cells are flown into the anaerobic treatment tank, they do not accumulate and flow out into the treated water. It is desirable to send the treated water that has passed through the acid generation tank to the anaerobic treatment tank without adjusting the pH.
  • anaerobic treatment tank When the anaerobic treatment tank is filled with a non-biological carrier, a resin carrier that allows easy adjustment of specific gravity and particle size is preferable.
  • the complete mixing type reaction tank using a stirrer etc. the upward flow type reaction tank which mixes the inside of a tank with a water flow and generated gas, etc. can be utilized.
  • anaerobic treated water may be aerobically treated.
  • Example 1 As shown in FIG. 1, an acid generation tank 1 having a capacity of 18 L, a relay tank 2, and an anaerobic treatment tank 3 having a diameter of 15 cm, a height of 60 cm, and a capacity of about 10 L are used. Processed with d.
  • Water flow conditions were an acid generation tank HRT 6 hours and an anaerobic treatment tank HRT 1.5 hours.
  • the liquid in a tank was circulated and stirred by the pump.
  • the anaerobic treatment tank 3 was filled with a carrier. The filling amount of the carrier was 40% with respect to the anaerobic treatment tank.
  • 2 L of dispersed anaerobic sludge (10000 mg VSS / L) was added as seed sludge.
  • the treated water was taken out from the upper part of the anaerobic treatment tank 3 through a screen. A part of the treated water was returned to the relay tank 2 at 700 L / d.
  • the pH of the relay tank 2 is monitored, and an alkali is added to the relay tank 2 when a failure occurs in the alkali addition means of the acid generation tank 1.
  • Table 1 shows the quality of treated water in the acid generation tank and anaerobic treatment tank.
  • Table 2 shows the quality of treated water in the acid generator tank and anaerobic tank.
  • the removal rates of BOD and n-Hex with respect to the raw water were 63% and 75%, respectively.
  • the n-Hex component can be removed to some extent with the treated water, but this is due to the fact that the oil and fat component adheres to the surface of the carrier. Moreover, about SS, it increased a little by the microbial cell production
  • the CODcr removal rate was 63%. Since the oil and fat component adhered to the carrier tank and the carriers adhered to each other, stable operation could not be performed.
  • the oil and fat and the waste water are not separated, the acid generation reaction is performed under alkaline conditions (pH 8 to 9), and the methane generation reaction is performed under the alkaline conditions. By carrying out, it becomes possible to treat fat-containing organic waste water efficiently.

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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

L'invention concerne un procédé de traitement d'eaux usées contenant des graisses rendant possible de purifier des eaux usées contenant des graisses à un rendement élevé et de récupérer de l'énergie de façon efficace à partir d'un composant organique dans les eaux usées, et de stabiliser un procédé de fermentation de méthane, d'améliorer le rendement du traitement, de réduire la dimension d'un réservoir de fermentation de méthane, d'améliorer le rendement de séparation des graisses à partir des eaux usées contenant des graisses, de réduire le volume de boue générée et ainsi de suite. L'invention concerne un procédé de traitement d'eaux usées contenant des graisses, le procédé étant caractérisé en ce que les eaux usées contenant des graisses sont soumises à une réaction de génération d'acide dans des conditions alcalines sans avoir séparé la graisse et les eaux usées, et ensuite la mise en œuvre d'une réaction de génération de méthane toujours en étant dans des conditions alcalines. L'invention concerne également un procédé de traitement d'eaux usées contenant des graisses, le procédé étant caractérisé en la mise en œuvre d'une réaction de génération de méthane dans un réservoir de réaction garni d'un support de lit fluidisé fait de résine.
PCT/JP2013/058932 2012-03-30 2013-03-27 Procédé de traitement d'eaux usées contenant des graisses WO2013146853A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012080519A JP5880217B2 (ja) 2012-03-30 2012-03-30 油脂含有排水の処理方法
JP2012-080519 2012-03-30

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018190775A1 (fr) * 2017-04-11 2018-10-18 Nanyang Technological University Système de digestion anaérobie à hyperdébit pour réduction de biosolides améliorée

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6497871B2 (ja) * 2014-08-27 2019-04-10 水ｉｎｇ株式会社 油脂含有排水の処理方法及び装置
JP7091095B2 (ja) * 2017-03-14 2022-06-27 住友重機械工業株式会社 水処理装置
JP7215821B2 (ja) * 2017-03-28 2023-01-31 住友重機械エンバイロメント株式会社 水処理装置
JP2019130504A (ja) * 2018-02-01 2019-08-08 オルガノ株式会社 水処理方法および水処理装置

Citations (16)

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JPS6171891A (ja) * 1984-09-13 1986-04-12 Shimizu Constr Co Ltd 流動床型バイオリアクタ
JPH01180295A (ja) * 1988-01-08 1989-07-18 Toshiba Corp 流動床型水処理装置
JPH0435794A (ja) * 1990-05-31 1992-02-06 Atsushi Toyoda 完全混合式汚水処理方法及びその処理装置
JPH0445891A (ja) * 1990-06-13 1992-02-14 Katsutoshi Oshima 有機性廃液の浄化方法
JPH05161900A (ja) * 1991-12-12 1993-06-29 Fujita Corp 油脂含有汚泥の処理方法
JPH09122683A (ja) * 1995-10-31 1997-05-13 Kurita Water Ind Ltd 嫌気性処理法
JPH11347588A (ja) * 1998-06-04 1999-12-21 Sumitomo Heavy Ind Ltd メタン発酵処理装置及び処理方法
JP2000237787A (ja) * 1999-02-19 2000-09-05 Ebara Corp 油脂含有排水の嫌気性処理方法
JP2000271593A (ja) * 1999-03-24 2000-10-03 Ebara Corp 油脂含有排水の嫌気性処理方法
JP2001038378A (ja) * 1999-07-29 2001-02-13 Sumitomo Heavy Ind Ltd 有機性排水の嫌気性処理方法及び設備
JP2001225094A (ja) * 2000-02-18 2001-08-21 Nissin Electric Co Ltd 排水処理方法及び排水処理装置
JP2002153897A (ja) * 2000-11-17 2002-05-28 Sumitomo Heavy Ind Ltd 有機性排水の処理方法及び装置
JP2003326295A (ja) * 2002-05-10 2003-11-18 Ebara Corp 有機性廃水の処理方法及び装置
JP2006247601A (ja) * 2005-03-14 2006-09-21 Tokyo Gas Co Ltd メタン生成法及びメタン生成装置
JP2009148705A (ja) * 2007-12-20 2009-07-09 Ebara Corp 嫌気性処理方法及び装置
JP2010012446A (ja) * 2008-07-07 2010-01-21 Sumitomo Heavy Ind Ltd 油脂含有排水処理装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007029841A (ja) * 2005-07-26 2007-02-08 Ishikawajima Harima Heavy Ind Co Ltd 有機性廃棄物処理装置及び方法

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6171891A (ja) * 1984-09-13 1986-04-12 Shimizu Constr Co Ltd 流動床型バイオリアクタ
JPH01180295A (ja) * 1988-01-08 1989-07-18 Toshiba Corp 流動床型水処理装置
JPH0435794A (ja) * 1990-05-31 1992-02-06 Atsushi Toyoda 完全混合式汚水処理方法及びその処理装置
JPH0445891A (ja) * 1990-06-13 1992-02-14 Katsutoshi Oshima 有機性廃液の浄化方法
JPH05161900A (ja) * 1991-12-12 1993-06-29 Fujita Corp 油脂含有汚泥の処理方法
JPH09122683A (ja) * 1995-10-31 1997-05-13 Kurita Water Ind Ltd 嫌気性処理法
JPH11347588A (ja) * 1998-06-04 1999-12-21 Sumitomo Heavy Ind Ltd メタン発酵処理装置及び処理方法
JP2000237787A (ja) * 1999-02-19 2000-09-05 Ebara Corp 油脂含有排水の嫌気性処理方法
JP2000271593A (ja) * 1999-03-24 2000-10-03 Ebara Corp 油脂含有排水の嫌気性処理方法
JP2001038378A (ja) * 1999-07-29 2001-02-13 Sumitomo Heavy Ind Ltd 有機性排水の嫌気性処理方法及び設備
JP2001225094A (ja) * 2000-02-18 2001-08-21 Nissin Electric Co Ltd 排水処理方法及び排水処理装置
JP2002153897A (ja) * 2000-11-17 2002-05-28 Sumitomo Heavy Ind Ltd 有機性排水の処理方法及び装置
JP2003326295A (ja) * 2002-05-10 2003-11-18 Ebara Corp 有機性廃水の処理方法及び装置
JP2006247601A (ja) * 2005-03-14 2006-09-21 Tokyo Gas Co Ltd メタン生成法及びメタン生成装置
JP2009148705A (ja) * 2007-12-20 2009-07-09 Ebara Corp 嫌気性処理方法及び装置
JP2010012446A (ja) * 2008-07-07 2010-01-21 Sumitomo Heavy Ind Ltd 油脂含有排水処理装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018190775A1 (fr) * 2017-04-11 2018-10-18 Nanyang Technological University Système de digestion anaérobie à hyperdébit pour réduction de biosolides améliorée

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TW201345842A (zh) 2013-11-16
JP5880217B2 (ja) 2016-03-08

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