WO2014199972A1 - Dispositif de traitement d'eau résiduaire de production d'alcool et procédé de traitement correspondant - Google Patents

Dispositif de traitement d'eau résiduaire de production d'alcool et procédé de traitement correspondant Download PDF

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Publication number
WO2014199972A1
WO2014199972A1 PCT/JP2014/065308 JP2014065308W WO2014199972A1 WO 2014199972 A1 WO2014199972 A1 WO 2014199972A1 JP 2014065308 W JP2014065308 W JP 2014065308W WO 2014199972 A1 WO2014199972 A1 WO 2014199972A1
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WO
WIPO (PCT)
Prior art keywords
water
alcohol production
wastewater
condensed water
reaction tank
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PCT/JP2014/065308
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English (en)
Japanese (ja)
Inventor
和也 小松
田中　倫明
智弘 清川
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栗田工業株式会社
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Publication of WO2014199972A1 publication Critical patent/WO2014199972A1/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
    • C02F3/2833—Anaerobic digestion processes using fluidized bed reactors
    • 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
    • C02F2209/40—Liquid flow rate
    • 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
    • C02F2303/02—Odour removal or prevention of malodour

Definitions

  • the present invention relates to a treatment apparatus and a treatment method for wastewater generated when alcohol such as bioethanol and distilled liquor is produced using sugarcane, corn, wheat and the like as raw materials.
  • the present invention particularly relates to an apparatus and method for anaerobically treating condensed water obtained by distillation treatment of alcohol production wastewater.
  • raw materials for grains such as sugar cane, corn, and wheat are subjected to pretreatment and saccharification treatment such as acid treatment, alkali treatment, biological treatment, and physical treatment to produce a carbon source.
  • saccharification treatment such as acid treatment, alkali treatment, biological treatment, and physical treatment to produce a carbon source.
  • yeast By fermenting the obtained carbon source with yeast, a low-concentration ethanol-containing fermentation broth is produced.
  • Bioethanol and distilled liquor are produced by concentrating and distilling the fermented liquor and further purifying as necessary (for example, Patent Document 1).
  • Alcohol production wastewater is mainly composed of organic acids produced in the fermentation process, in addition to grain residues, waste yeast, and sugars.
  • Alcohol production wastewater is conventionally treated by the following method. (1) In a factory having vast land, treated water is obtained by directly treating alcohol production wastewater with an anaerobic lagoon. The residual sludge of the anaerobic lagoon is effectively used for fertilizers and the like because components such as nitrogen, phosphorus, and potassium in the fermentation liquid are concentrated. (2) In a factory that has a biomass boiler and can secure a large amount of steam, the alcohol production wastewater is further distilled. Recycle distillate bottoms (concentrated residue) as liquid fertilizer. The condensed water of the tower top distillate gas whose COD concentration is reduced to about several thousand mg / L by distillation is treated with an anaerobic lagoon.
  • UASB Upflow Anaerobic Sludge Blanket: Upflow high-speed treatment using granular sludge with high density and high sedimentation as a treatment method for high-concentration organic wastewater discharged from beer, beverages, food factories, etc.
  • the counter-current anaerobic sludge blanket method is known.
  • organic wastewater is introduced into a reaction tank that holds a sludge blanket formed of granular sludge, and is allowed to contact the sludge blanket by flowing upward.
  • An EGSB method Extra Granule
  • Sludge Blanket is also known.
  • granular sludge in which anaerobic microorganisms are granulated is used, and the sludge containing anaerobic microorganisms is maintained and grown in the form of granules (grains).
  • the biological treatment method using granular sludge can be operated at a high load because a high sludge retention concentration can be obtained as compared with a fixed bed or fluidized bed in which microorganisms are held on a carrier.
  • fertilizer components such as nitrogen, phosphorus, and potassium in the alcohol production wastewater are concentrated (about 1/3 to 1/4 as the amount of water). Can be recovered and effectively used as fertilizer. Since the COD concentration of the condensed water supplied to the anaerobic lagoon is significantly reduced as compared with the alcohol production waste water before distillation, the organic load of waste water treatment is reduced. Compared to the direct anaerobic lagoon treatment of the alcohol production wastewater as it is, the treatment facility can be downsized and treated water with good water quality can be obtained. However, since an anaerobic lagoon is used, odors and other exhaust gases are generated.
  • this condensate is mainly composed of organic acids and does not contain sugars required to form granules. Therefore, it is impossible to stably form and maintain granules. A large amount of alkaline agent is required to neutralize the organic acid.
  • the present invention provides an apparatus and a method for treating alcohol production wastewater that can suppress the consumption of an alkaline agent and perform high load and stable treatment in anaerobic treatment of distilled condensed water of alcohol production wastewater. This is the issue.
  • the present inventor is an anaerobic reaction of an upward flow type fluidized bed type in which anaerobic microorganisms attached to the surface of a carrier are treated while anaerobic treatment of distilled condensed water of alcohol production wastewater is circulated. It has been found that by applying the tank, it is not necessary to form granules and a good treatment can be performed.
  • the present inventor can use the alkalinity of the treated water to neutralize the organic acid in the raw water by increasing the circulation amount of the treated water with respect to the raw water (condensed water). Found that can be reduced.
  • the circulation of the treated water is also performed by the UASB method and the EGSB method using granules.
  • the circulation rate can only be increased to about 4 m / hr.
  • the sedimentation rate of the carrier is 200 to 500 m / hr, which is significantly higher than the granule sedimentation rate of 50 to 80 m / hr. Therefore, even if the circulation rate is increased to about LV 4 to 20 m / hr, The microorganisms can be retained and processed stably.
  • the present invention has been achieved on the basis of such findings, and the gist thereof is as follows.
  • an alcohol production wastewater treatment apparatus for anaerobically treating condensed water obtained by distillation treatment of organic wastewater discharged from the production process of alcohol production wastewater, while circulating a part of the treated water as circulating water
  • An apparatus for treating wastewater from alcohol production comprising an upward flow fluidized bed type anaerobic reaction tank for treating with anaerobic microorganisms adhering to the surface of the carrier, wherein the condensed water is COD Cr 500-20,000 mg / L
  • the organic acid-containing water containing 30 to 90% of the organic acid component in the total COD Cr and is calculated by the ratio of the circulating water amount to the condensed water amount treated in the anaerobic reaction tank (circulating water amount / condensed water amount).
  • a treatment apparatus for alcohol production waste water wherein the circulation ratio is 5 or more.
  • the carrier has a specific gravity of 1.1 to 1.3 and an average particle diameter of 1 to 30 mm, and the carrier filling rate of the upward flow fluidized bed anaerobic reaction tank is as follows. Alcohol production waste water treatment equipment characterized by 10 to 80%.
  • the anaerobic treatment conditions in the upward flow type fluidized bed type anaerobic reaction tank are as follows: temperature 20 to 60 ° C., pH 6 to 8, tank load 2 to 40 kg-COD An apparatus for treating alcohol production wastewater, wherein Cr / m 3 / day.
  • the circulating water includes bicarbonate generated by decomposing an organic acid in the condensed water, and the condensed water is added with alkali.
  • a method for treating alcohol production wastewater in which condensed water obtained by distillation treatment of organic wastewater discharged from the production process of alcohol production wastewater is anaerobically treated, a portion of the treated water is circulated through the condensed water.
  • An alcohol production wastewater treatment method for introducing an anaerobic treatment into an upward flow fluidized bed type anaerobic reaction tank that performs treatment with anaerobic microorganisms attached to the surface of the carrier while circulating as water, wherein the condensed water is COD Cr 500 to 20,000 mg / L, organic acid-containing water containing 30 to 90% of organic acid components in the total COD Cr , and the ratio of the circulating water amount to the condensed water amount treated in the anaerobic reaction tank ( A method of treating alcohol production wastewater, characterized in that the circulation ratio calculated by (circulated water amount / condensed water amount) is 5 or more.
  • the carrier has a specific gravity of 1.1 to 1.3 and an average particle diameter of 1 to 30 mm, and the carrier filling rate of the upward flow fluidized bed anaerobic reaction tank is as follows.
  • a method for treating wastewater from alcohol production characterized by comprising 10 to 80%.
  • the anaerobic treatment conditions in the upward flow type fluidized bed type anaerobic reaction tank are a temperature of 20 to 60 ° C., a pH of 6 to 8, and a tank load of 2 to 40 kg-COD. It is Cr / m ⁇ 3 > / day,
  • drain characterized by the above-mentioned.
  • the circulating water includes bicarbonate generated by decomposing an organic acid in the condensed water, and an alkali is added to the condensed water, A method for treating wastewater from alcohol production, wherein the pH is adjusted using the alkalinity of circulating water.
  • the present invention in anaerobic treatment of distilled condensed water of alcohol production wastewater, while reducing the consumption of alkaline agent, it is possible to efficiently obtain high quality treated water by performing high load and stable treatment. it can. If it is an upward flow type fluidized bed type anaerobic reaction tank, the problem of an odor and exhaust gas is also reduced, without requiring a vast space like the conventional anaerobic lagoon.
  • the condensed water obtained by distillation treatment of the organic wastewater discharged from the production process of alcohol production wastewater is anaerobically treated.
  • a carbon source obtained by saccharifying grains and the like is fermented by yeast to produce a fermentation liquid containing alcohol.
  • the fermented liquor is concentrated, distilled, and further purified as necessary to produce alcohol.
  • the condensed water and the bottoms of the distillation tower, which are concentrated residues, are separated.
  • This condensed water is treated by the method and apparatus of the present invention.
  • This condensed water is preferably obtained by condensing the overhead effluent gas of a distillation column for distilling wastewater containing high concentration COD.
  • This condensed water is mainly composed of organic acids such as acetic acid and propionic acid.
  • This condensed water is an acidic wastewater containing about 30 to 90% of organic acid components in the total COD Cr , having a COD Cr concentration of about 500 to 20,000 mg / L, and a pH of about 3 to 5.
  • such condensed water is anaerobically treated in an upward flow fluidized bed type anaerobic reaction tank.
  • FIG. 1 is a system diagram showing an embodiment of a treatment apparatus for alcohol production wastewater of the present invention having an upward flow type fluidized bed anaerobic reaction tank according to the present invention.
  • 1 is a pH adjustment tank
  • 2 is an upward flow type fluidized bed type anaerobic reaction tank
  • 3 is a treated water tank.
  • Raw water condensed water
  • part of the treated water is introduced as circulating water from the treated water tank 3 through the pipe 12.
  • An alkaline agent is added to the pH adjusting tank 1 through a pipe 13 to adjust the pH.
  • the water whose pH has been adjusted in the pH adjusting tank 1 is introduced from the pipe 14 to the bottom of the upward flow type fluidized bed type anaerobic reaction tank 2.
  • the anaerobic reaction tank 2 is filled with a carrier 4, and the water introduced into the anaerobic reaction tank 2 flows the carrier 4 in the tank in the process of flowing upward in the tank, It is treated with anaerobic microorganisms attached to the carrier 4.
  • the treated water is introduced into the treated water tank 3 through the pipe 15.
  • the treated water tank 3 is provided with a submersible pump 5 and a return pipe 16 for returning the carrier flowing out from the anaerobic reaction tank 2 to the anaerobic reaction tank 2.
  • the effluent carrier is returned to the anaerobic reaction tank 2 through the pipe 16.
  • a carrier outflow prevention screen 6 is provided in the vicinity of the treated water outlet in the treated water tank 3.
  • the treated water that has passed through the screen 6 is taken out from the pipe 17, part of it is circulated through the pipe 12 as circulating water to the pH adjustment tank 1, and the rest is discharged out of the system.
  • the blower 7 performs aeration cleaning of the screen in order to prevent the screen 6 from being blocked.
  • the gas of the blower 7 is preferably air or nitrogen gas.
  • FIG. 1 shows an example of the apparatus for treating alcohol production wastewater of the present invention, and the apparatus for treating alcohol production wastewater of the present invention is not limited to the illustrated one.
  • the pH adjustment tank is not necessarily required, and the circulating water may be injected into the line by connecting the circulating water circulation pipe to the pipe for introducing the raw water into the bottom of the anaerobic reaction tank.
  • raw water may be injected into a circulation pipe that circulates part of the treated water to the bottom of the anaerobic reaction tank.
  • the alkaline agent for pH adjustment can be line-injected into these pipes.
  • the treated water tank is not necessarily required, and this can be omitted, and a part of the treated water can be circulated to the anaerobic reaction tank through the circulating water circulation pipe branched from the treated water extraction pipe.
  • the screen for preventing the carrier from flowing out is provided in the vicinity of the treated water outlet in the anaerobic reaction tank.
  • a gas not containing oxygen such as nitrogen gas is used in order to maintain the anaerobic state in the anaerobic reaction tank.
  • a neutralization tank and an acid generation tank can be provided upstream of the anaerobic reaction tank.
  • the size of the carrier is preferably about 1 to 30 mm, particularly about 3 to 10 mm in terms of average particle diameter.
  • the particle diameter is the diameter when the carrier is spherical, and corresponds to the length of one side if it is a cube, but in the case of other irregular shapes, the carrier is sandwiched between two parallel plates. The length of the part where the distance between the plates is the largest.
  • Various shapes such as a spherical shape, a cubic shape, a rectangular parallelepiped shape, a rod shape, a cylindrical shape, and a disk shape can be used as the shape of the carrier.
  • the carrier filling rate of the upward flow type fluidized bed type anaerobic reaction tank (the ratio of the total volume (apparent volume) of the filled carrier to the effective volume of the anaerobic reaction tank) is about 10 to 80%, especially about 40 to 60%. It is preferable that
  • the circulation ratio calculated by the ratio of the circulating water amount to the raw water (condensed water) amount (circulating water amount / raw water amount) is 5 or more, preferably 10 or more. Circulate part of the treated water.
  • the condensed water, which is the raw water is usually acidic at a pH of about 3 to 5, but the anaerobic treated water contains bicarbonate (alkalinity) produced by the decomposition and removal of the organic acid. It can be used for pH adjustment of raw water.
  • the circulation ratio is preferably 20 or less.
  • anaerobic treatment conditions are not particularly limited, but it is preferable in terms of treatment efficiency to adopt the following conditions. Temperature: 20-60 ° C, preferably 25-38 ° C or 50-55 ° C pH: 6-8 Tank load: 2 to 40 kg-COD Cr / m 3 / day Upward flow velocity (LV): 4-20m / hr
  • Example 1 The raw water is condensed water having the following water quality obtained by distillation treatment of bioethanol production wastewater.
  • Raw water was anaerobically treated under the following conditions using a treatment apparatus shown in FIG. 1 using a tank capacity of 4 L (a cylindrical shape having a diameter of 10 cm and a height of 50 cm) and an upward flow type fluidized bed type anaerobic reaction tank.
  • ⁇ Anaerobic treatment conditions> Raw water treatment amount: 16L / day Temperature: 35 ° C Carrier: Polypropylene cylindrical carrier with bacterial cells attached Carrier size: Diameter 3 mm x Length 5 mm Carrier filling amount: 1.6L Carrier filling rate: 40% Tank load of anaerobic reaction tank: 20kg-COD Cr / m 3 / day

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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)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)

Abstract

L'invention porte sur un traitement anaérobie d'eau distillée condensée provenant d'eau résiduaire de production d'alcool, la consommation d'un agent alcalin étant supprimée et un traitement stable à un fort taux de charge étant effectué. Dans le procédé selon l'invention, lors de la mise en œuvre du traitement anaérobie sur de l'eau condensée obtenue par la mise en œuvre d'un traitement de distillation sur de l'eau résiduaire organique rejetée d'une étape de production d'eau résiduaire de production d'alcool, alors qu'une partie de l'eau traitée est amenée à circuler en tant qu'eau en circulation, l'eau condensée est traitée dans un réacteur anaérobie à lit fluidisé à courant ascendant dans lequel des micro-organismes anaérobies amenés à adhérer à la surface d'un support effectuent le traitement. Un rapport de circulation, qui est calculé comme étant le rapport de la quantité d'eau en circulation à la quantité d'eau condensée traitée dans le réacteur anaérobie (quantité d'eau en circulation/quantité d'eau condensée) est de préférence supérieur ou égal à 5.
PCT/JP2014/065308 2013-06-10 2014-06-10 Dispositif de traitement d'eau résiduaire de production d'alcool et procédé de traitement correspondant WO2014199972A1 (fr)

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JP2013-121861 2013-06-10
JP2013121861A JP5846160B2 (ja) 2013-06-10 2013-06-10 アルコール製造排水の処理装置及び処理方法

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1112073A (ja) * 1997-06-19 1999-01-19 Toray Eng Co Ltd 液体肥料の製造方法
JP2005169360A (ja) * 2003-12-15 2005-06-30 Sumitomo Heavy Ind Ltd 有機性汚泥減容化装置及び廃水処理装置
JP2009148705A (ja) * 2007-12-20 2009-07-09 Ebara Corp 嫌気性処理方法及び装置
JP2010042352A (ja) * 2008-08-12 2010-02-25 Ebara Corp 嫌気性処理方法及び装置
WO2012070493A1 (fr) * 2010-11-26 2012-05-31 栗田工業株式会社 Procédé de traitement anaérobie
JP2013059729A (ja) * 2011-09-14 2013-04-04 Swing Corp 有機性廃水の嫌気性処理装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4184021B2 (ja) * 2002-09-30 2008-11-19 月島機械株式会社 アルコールの製造方法
IT1393126B1 (it) * 2009-03-05 2012-04-11 Eni Spa Processo per la purificazione di una corrente acquosa proveniente dalla reazione di fischer-tropsch

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1112073A (ja) * 1997-06-19 1999-01-19 Toray Eng Co Ltd 液体肥料の製造方法
JP2005169360A (ja) * 2003-12-15 2005-06-30 Sumitomo Heavy Ind Ltd 有機性汚泥減容化装置及び廃水処理装置
JP2009148705A (ja) * 2007-12-20 2009-07-09 Ebara Corp 嫌気性処理方法及び装置
JP2010042352A (ja) * 2008-08-12 2010-02-25 Ebara Corp 嫌気性処理方法及び装置
WO2012070493A1 (fr) * 2010-11-26 2012-05-31 栗田工業株式会社 Procédé de traitement anaérobie
JP2013059729A (ja) * 2011-09-14 2013-04-04 Swing Corp 有機性廃水の嫌気性処理装置

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JP2014237102A (ja) 2014-12-18
MY169243A (en) 2019-03-19
JP5846160B2 (ja) 2016-01-20

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