WO2006035594A1 - 油脂含有排水の生物処理方法及び処理装置 - Google Patents
油脂含有排水の生物処理方法及び処理装置 Download PDFInfo
- Publication number
- WO2006035594A1 WO2006035594A1 PCT/JP2005/016750 JP2005016750W WO2006035594A1 WO 2006035594 A1 WO2006035594 A1 WO 2006035594A1 JP 2005016750 W JP2005016750 W JP 2005016750W WO 2006035594 A1 WO2006035594 A1 WO 2006035594A1
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- WIPO (PCT)
- Prior art keywords
- oil
- sludge
- treatment
- containing wastewater
- biological treatment
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Classifications
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
-
- 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 biological treatment method and treatment apparatus for oil-containing wastewater.
- Oil and fat in the wastewater is pre-treated with a pressure levitation device, etc., and removed in advance, and the separated liquid is treated with a microorganism treatment such as the activated sludge method to produce oil-containing sludge! There are things to do.
- a large amount of flocculant is required to separate fats and oils from oil-containing wastewater using a pressurized flotation device.
- oil-and-fat in the oil-containing sludge is adsorbed and removed by the adsorbent, and then the sludge is dehydrated and discarded. Since oil-containing sludge contains undecomposed organic matter, odor is generated from it. Incineration of dewatered sludge generates harmful substances.
- a method is known in which a microorganism preparation is added to a conditioning tank or an aeration tank for treating oil-containing wastewater, and the oil and fat is decomposed in the aeration tank.
- Japanese Patent Application Laid-Open No. 6-246295 describes a method of anaerobic treatment after adding lipase to oil-containing wastewater to decompose the oil. Lipase hydrolyzes fats and oils into glycerin and higher fatty acids by lipase. Libase oxidizes the higher fatty acids produced to lower fatty acids by oxidation (8).
- a yeast treatment method is known as a method using a microorganism capable of efficiently decomposing fats and oils. Unlike the treatment with a microbial preparation, the yeast treatment method only requires the introduction of yeast at the start-up, and does not require a fixed-quantity injection device or an oil-degrading bacterial culture tank.
- the yeast treatment method can treat wastewater with high concentration. In the yeast treatment process, organic matter is decomposed and heat energy is generated, so there is little generation of excess sludge.
- Methane fermentation that is, anaerobic digestion, is oil containing fat and oil-containing wastewater and oil containing oil-containing wastewater. It may be used for the treatment of fat-containing sludge (Japanese Patent Laid-Open No. 57-117380, Japanese Patent Laid-Open No. 2001-321792).
- Japanese Patent Application Laid-Open No. 2001-321792 describes a method in which surplus sludge generated from a subsequent aerobic treatment tank is mixed with fat and oil-containing waste water, and the waste water is directly subjected to methane fermentation.
- Japanese Patent Application Laid-Open No. 2001-317992 describes that in this treatment, the treatment performance is improved by adding lipase, introducing a microorganism-supporting carrier, and adding microorganisms to mitigate the inhibition of higher fatty acids. Yes.
- High load operation can be performed by introducing a microbial carrier, but in this case, clogging due to undegraded oil or higher fatty acid salt is likely to occur and the carrier is likely to float.
- the biological treatment method for fat-containing wastewater includes an oil-water separation step of obtaining oil-water separation sludge and a separated liquid by separating the oil-containing wastewater into oil-water, and a methane fermentation step of subjecting the oil-water separation sludge to methane fermentation treatment. And a biological treatment process for aerobic treatment and Z or high-load anaerobic treatment of the separated liquid. At least part of the excess sludge generated in the biological treatment process is introduced into the methane fermentation process.
- the biological treatment method for oil-containing wastewater includes an oil-water separation step of separating oil-water containing wastewater into oil-water separation to obtain oil-water separation sludge and a separated liquid, and a methane fermentation step of subjecting the oil-water separation sludge to methane fermentation treatment. And a biological treatment process for aerobic treatment and Z or high-load anaerobic treatment of the separated liquid. At least a part of the digested sludge generated in the methane fermentation process and Z or surplus sludge generated in the biological treatment process is mixed with the oil-containing wastewater introduced into the oil / water separation process.
- the biological treatment apparatus for fat-containing wastewater performs oil-water separation of the fat-containing wastewater.
- Oil-water separation means for obtaining oil-water separation sludge and separation liquid
- methane fermentation means for subjecting the oil-water separation sludge to methane fermentation
- biological treatment means for subjecting the separation liquid to aerobic treatment and Z or high-load anaerobic treatment .
- This apparatus includes a sludge transfer means for introducing at least a part of surplus sludge generated by the biological treatment means into the methane fermentation means.
- the biological treatment apparatus for fat-containing wastewater comprises oil-water separation means for separating oil-containing wastewater into oil-water to obtain oil-water separation sludge and a separated liquid, and methane fermentation means for subjecting the oil-water separation sludge to methane fermentation treatment. And biological treatment means for aerobic treatment and Z or high-load anaerobic treatment of the separated liquid. This device is used for oil-containing wastewater introduced into oil-water separation means.
- sludge mixing means for mixing at least part of the digested sludge generated by the methane fermentation means and Z or excess sludge generated by the biological treatment means.
- the fat-containing wastewater is purified with high efficiency.
- the energy from the organic components in the wastewater is efficiently recovered.
- the methane fermentation treatment is stabilized, the treatment efficiency is improved, the methane fermentation tank is downsized, the separation efficiency of fats and oils from oil-containing wastewater is improved, and the amount of generated sludge is reduced. Sludge disposal costs will be reduced and land for treatment facilities will be reduced.
- the biological treatment method of the fat-containing wastewater of the first aspect and the biological treatment device of the fat-containing wastewater of the third aspect it is subjected to surplus sludge catalyzed fermentation treatment generated by biological treatment of the oil-water separation liquid, Sludge is reduced.
- surplus sludge for high-load anaerobic treatment is introduced, high-concentration methanogenic bacteria can be inoculated, stabilizing the methane fermentation treatment and improving efficiency.
- digested sludge generated by methane fermentation and Z or excess sludge generated in the biological treatment process These sludge adsorbs fats and oils when mixed with fat-containing wastewater.
- the amount of flocculant used in the flocculation process prior to oil-water separation is reduced. Overall excess sludge generation will also decrease.
- FIG. 1 is a system diagram showing an embodiment of a biological treatment method and a treatment apparatus for fat and oil-containing wastewater according to the present invention.
- FIG. 2 is a system diagram showing another embodiment of the biological treatment method and treatment apparatus for fat and oil-containing wastewater of the present invention.
- FIG. 3 is a system diagram showing another embodiment of the biological treatment method and treatment apparatus for fat and oil-containing wastewater of the present invention.
- FIG. 4 is a system diagram showing another embodiment of the biological treatment method and treatment apparatus for oil-containing wastewater of the present invention.
- FIGS. 1 to 4 are system diagrams showing an embodiment of the biological treatment method and treatment apparatus for fat and oil-containing wastewater of the present invention. 1 to 4, members having the same function are denoted by the same reference numerals.
- raw water (oil-containing wastewater) is introduced into a raw water storage tank 1 through a pipe 21 and introduced into a coagulation reaction tank 2 through a pipe 22 together with a desorption liquid of a sludge dehydrator 9 described later.
- the flocculation reaction tank 2 the polymer flocculant and the inorganic flocculant are added from the pipe 23, and the raw water is flocculated.
- the agglomerated treated water is introduced into the oil / water separation tank (pressurized flotation tank) 3 through the pipe 24 and floated and separated into the pressurized flotation sludge (oil-containing sludge) and the pressurized flotation treated water.
- Pressurized levitated water is introduced into the acid generation tank 4 from the pipe 25 and subjected to acid fermentation treatment, and then introduced into the high-load anaerobic treatment tank 5 from the pipe 26 and subjected to high-load anaerobic treatment.
- UAS B Upflow Anaerobic Sludge Blanket
- anaerobic fluidized bed method is effective.
- the noise gas generated in the high-load anaerobic treatment tank 5 is desulfurized in the desulfurization tower 10 from the pipe 27, and then passes through the pipe 28, the gas holder 11 and the pipe 29, and is used for energy generation processes such as gas power generation and boilers. To be sent to.
- the treated water in the high-load anaerobic treatment tank 5 is introduced into the aerobic treatment tank 6 from the pipe 32 and subjected to aerobic treatment, and then introduced into the sedimentation tank 7 through the pipe 33 and separated into solid and liquid.
- the separated water in the sedimentation basin 7 is discharged out of the system as treated water from the pipe 34.
- Part of the separated sludge Is returned to the aerobic treatment tank 6 through the pipes 35 and 35A, and the remainder is supplied to the methane fermentation tank 8 through the pipes 35, 35B and 31.
- the pressurized levitation sludge in the pressurized levitation tank 3 is fed to the methane fermentation tank 8 through the pipe 36, and is subjected to methane fermentation treatment together with surplus sludge from the biological treatment in the pipe 31.
- the biogas generated in the methane fermentation in the methane fermentation tank 8 is desulfurized in the desulfurization tower 10 from the pipe 37 in the same manner as the biogas from the high load anaerobic treatment tank 5, and then the gas holder 11 and the pipe 29 After that, it is sent to the energy utilization process.
- Digested sludge from the methane fermentation tank 8 is sent to the sludge dewatering machine (or sludge concentrator) 9 through the pipe 38 for dehydration, and the dehydrated cake is discharged out of the system through the pipe 39 for landfill or incineration. The final disposal.
- the desorbed liquid from the dehydrator 9 is returned to the raw water storage tank 1 through the pipe 40 and processed together with the raw water.
- surplus aerobic sludge from pipe 35B and surplus anaerobic sludge from pipe 30 are fed to agglomeration reactor 2 instead of methane fermenter 8, and surplus digestion from methane fermenter 8 Unlike the treatment shown in Fig. 1, the sludge is extracted and fed to the coagulation reaction tank 2 from the pipe 41, and only the polymer coagulant is added to the coagulation reaction tank 2 and no inorganic coagulant is added. A similar process is performed.
- the digested sludge from the methane fermentation tank 8 is not sent to the flocculation reaction tank 2, but the concentrated sludge from the sludge dehydrator 9 is returned to the methane fermentation tank 8 through the pipe 42. Unlike the processing shown in, the same processing is performed for the others. [0028] In the process of Fig. 3, the digested sludge extracted from the methane fermentation tank 8 is dehydrated or concentrated by a sludge dewatering machine (or sludge concentrator) 9, and a part or all of the dehydrated sludge or concentrated sludge is removed from the methane fermentation tank.
- a sludge dewatering machine or sludge concentrator
- the methane fermentation tank 8 can be downsized by the high-load operation of the methane fermentation tank 8.
- the operating conditions of the methane fermentation tank 8 are as follows: the sludge concentration in the tank is 20000mgZL or more, preferably 20000-100,000mgZL, SRT is 15 days or more, preferably 15-40 days, HRT is 20 days or less Preferably, it can be 3 to 20 days.
- an acid generation tank 4 is provided in the preceding stage of the flocculation reaction tank 2, and the surplus anaerobic sludge from the pipe 35B and the surplus anaerobic sludge from the pipe 30 are not in the flocculation reaction tank 2 but in this acid generation tank.
- the raw water storage tank 1 is fed into the acid generation tank 4 from the pipe 22A and acid-fermented and then introduced into the coagulation reaction tank 2 through the pipe 22B.
- Other processes are the same.
- the methane fermentation tank 8 can be downsized by high-load operation of the methane fermentation tank 8 by returning the concentrated return sludge as in FIG.
- acid generation acid fermentation
- pressurized flotation sludge is also subjected to acid fermentation in advance, it is possible to stabilize the treatment in the methane fermentation tank and improve the decomposition efficiency of organic matter.
- the treatment shown in Figs. 1 to 4 is an example of an embodiment of the biological treatment method and treatment apparatus for fat and oil-containing wastewater of the present invention.
- the present invention is not limited to the illustrated treatment unless it exceeds the gist. It is not limited.
- the oil / water separation tank 3 is not limited to a pressurized flotation tank, and may be a precipitation tank if possible.
- Biological treatment of pressurized flotation treatment water is not limited to the combined use of aerobic treatment and high-load anaerobic treatment, but only one of them can be used! In FIG.
- a part of the dewatered cake from the sludge dewatering machine 9 may be returned to the agglomeration reaction tank 2 together with the surplus digested sludge in the methane fermentation tank 8 or instead of the surplus digested sludge.
- a part of the concentrated return sludge from the sludge dehydrator 9 may be fed to the flocculation reaction tank 2, and all of the concentrated return sludge is not the methane fermentation tank 8, but the flocculation reaction tank. It may be returned to 2. Even in this case, as a result, the sludge concentration in the methane fermentation tank 8 can be increased and high-load operation can be performed.
- the concentrated return sludge from the sludge dehydrator 9 can be partially fed to the acid generation tank 4 and all of the concentrated return sludge can be sent to the acid generation tank 4 instead of the methane fermentation tank 8.
- V can be returned.
- High load operation can be performed by increasing the sludge concentration in the methane fermentation tank 8.
- Fig. 2 The method shown in Fig. 2 was used to treat the following water quality food factory effluent (flow rate 430m 3 Zd) as raw water.
- This oil-containing wastewater has a relatively low oil concentration, and the composition ratio of sludge produced by the conventional method (combined use of the pressurized flotation method and the activated sludge method) shown in Comparative Example 1 described later is 3: 4 Pressure levitation scum: surplus sludge).
- Acid generation tank volume 110m 3
- High load anaerobic treatment tank volume 210m 3
- Aerobic treatment tank volume 150m 3
- Methane fermenter volume 45m 3
- the amount of methane generated was 526 m 3 / d
- the moisture content of the dehydrated cake was 85%
- the amount generated was 0.73 tonZd, which was 84% lower than that of Comparative Example 1 described later. It was possible.
- Raw water similar to that treated in Example 1 was treated by the pressurized flotation method and the activated sludge method (activated sludge tank volume: 1010 m 3 ). That is, the raw water was subjected to pressure levitation treatment, the pressure levitation sludge was discharged, and the pressure levitation treatment water was subjected to activated sludge treatment.
- the generated sludge amount was 4.67 ton Zd.
- This oil-containing wastewater has a relatively high oil concentration, and the composition ratio of sludge produced by the conventional method (pressurized flotation method + activated sludge method) shown in Comparative Example 2 described later is 4: 1 (pressurized flotation scum) : Excess sludge).
- Such wastewater with high oil concentration has the BOD of pressurized flotation treated water very low in the treatment shown in Fig. 2. Therefore, the method shown in Fig. 4 is used.
- Aerobic treatment tank volume 88m 3
- Methane fermenter volume 67m 3
- the amount of methane generated was 535m 3 / d, and the moisture content of the dehydrated cake was 85%.
- the raw amount was 0.89 ton Zd, and it was possible to reduce the amount by 83% compared to Comparative Example 2 described later.
- Raw water similar to that treated in Example 2 was treated by the pressurized flotation method and the activated sludge method (activated sludge tank volume: 430 m 3 ). That is, the raw water was subjected to pressure levitation treatment, the pressure levitation sludge was discharged, and the pressure levitation treatment water was subjected to activated sludge treatment.
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Treatment Of Sludge (AREA)
- Activated Sludge Processes (AREA)
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JP2004282111A JP2006095377A (ja) | 2004-09-28 | 2004-09-28 | 油脂含有排水の生物処理方法及び処理装置 |
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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NO20076278L (no) * | 2007-12-06 | 2009-06-08 | Energreen As | Framgangsmåte for å redusere væskemengde i biologisk masse |
CN102603117A (zh) * | 2012-03-07 | 2012-07-25 | 江苏兆盛环保集团有限公司 | 一种餐厨垃圾二次废水的处理方法 |
CN103570181A (zh) * | 2012-07-23 | 2014-02-12 | 陕西德融新能源股份有限公司 | 一种生物柴油工厂含油污水处理工艺 |
CN103663855A (zh) * | 2012-12-20 | 2014-03-26 | 深圳市宇力科技有限公司 | 油田三元复合驱采油污水回灌前的处理方法、药剂以及专用设施 |
CN104193109A (zh) * | 2014-09-17 | 2014-12-10 | 安徽省绿巨人环境技术有限公司 | 餐饮类污水处理方法 |
CN109219580A (zh) * | 2016-06-08 | 2019-01-15 | 三菱电机株式会社 | 污泥处理装置及污泥处理方法 |
CN109422410A (zh) * | 2017-08-24 | 2019-03-05 | 张坤 | 一种沼渣液的加工方法 |
WO2019196053A1 (zh) * | 2018-04-12 | 2019-10-17 | 苏州荣能环保科技有限公司 | 高效节能综合水处理设备 |
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JP5371510B2 (ja) * | 2009-03-27 | 2013-12-18 | 大阪瓦斯株式会社 | 排水と有機性残渣の複合処理方法 |
US9409803B2 (en) * | 2010-01-29 | 2016-08-09 | Robert Whiteman | Systems and methods for reducing sludges produced by wastewater treatment facilities |
JP6216253B2 (ja) * | 2014-01-14 | 2017-10-18 | 水ing株式会社 | 油脂含有排水の処理方法および処理装置 |
JP2016195997A (ja) * | 2016-05-11 | 2016-11-24 | ジー・ロバート・ホワイトマンG.Robert WHITEMAN | 廃水処理施設で生じる汚泥を減少させるためのシステムおよび方法 |
JP6937139B2 (ja) * | 2016-05-19 | 2021-09-22 | 株式会社神鋼環境ソリューション | 廃棄物処理装置および廃棄物処理方法 |
JP6240800B2 (ja) * | 2016-05-19 | 2017-11-29 | 株式会社神鋼環境ソリューション | 廃棄物処理装置および廃棄物処理方法 |
JP7180979B2 (ja) * | 2018-01-25 | 2022-11-30 | 住友重機械工業株式会社 | 排水の生物処理方法及び排水処理システム |
CN112390457A (zh) * | 2020-10-13 | 2021-02-23 | 东莞三江港口储罐有限公司 | 油库仓储废水处理方法 |
WO2024003978A1 (ja) * | 2022-06-27 | 2024-01-04 | 株式会社水和 | 高級脂肪酸を含む油分及び増粘多糖類を含有する難分解性有機排水の生物処理方法 |
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO20076278L (no) * | 2007-12-06 | 2009-06-08 | Energreen As | Framgangsmåte for å redusere væskemengde i biologisk masse |
CN102603117A (zh) * | 2012-03-07 | 2012-07-25 | 江苏兆盛环保集团有限公司 | 一种餐厨垃圾二次废水的处理方法 |
CN103570181A (zh) * | 2012-07-23 | 2014-02-12 | 陕西德融新能源股份有限公司 | 一种生物柴油工厂含油污水处理工艺 |
CN103663855A (zh) * | 2012-12-20 | 2014-03-26 | 深圳市宇力科技有限公司 | 油田三元复合驱采油污水回灌前的处理方法、药剂以及专用设施 |
CN103663855B (zh) * | 2012-12-20 | 2015-04-22 | 深圳市宇力科技有限公司 | 油田三元复合驱采油污水回灌前的处理方法、药剂以及专用设施 |
CN104193109A (zh) * | 2014-09-17 | 2014-12-10 | 安徽省绿巨人环境技术有限公司 | 餐饮类污水处理方法 |
CN109219580A (zh) * | 2016-06-08 | 2019-01-15 | 三菱电机株式会社 | 污泥处理装置及污泥处理方法 |
CN109219580B (zh) * | 2016-06-08 | 2020-12-22 | 三菱电机株式会社 | 污泥处理装置及污泥处理方法 |
CN109422410A (zh) * | 2017-08-24 | 2019-03-05 | 张坤 | 一种沼渣液的加工方法 |
WO2019196053A1 (zh) * | 2018-04-12 | 2019-10-17 | 苏州荣能环保科技有限公司 | 高效节能综合水处理设备 |
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