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WO2001005713A1 - Procede et appareil permettant de reduire l'exces de depot - Google Patents

Procede et appareil permettant de reduire l'exces de depot Download PDF

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Publication number
WO2001005713A1
WO2001005713A1 PCT/JP2000/003347 JP0003347W WO0105713A1 WO 2001005713 A1 WO2001005713 A1 WO 2001005713A1 JP 0003347 W JP0003347 W JP 0003347W WO 0105713 A1 WO0105713 A1 WO 0105713A1
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WO
WIPO (PCT)
Prior art keywords
sludge
reactor
hydrogen peroxide
tank
converted
Prior art date
Application number
PCT/JP2000/003347
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English (en)
Japanese (ja)
Inventor
Shigeki Matsumoto
Original Assignee
Japan Environment Creation Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Japan Environment Creation Co., Ltd. filed Critical Japan Environment Creation Co., Ltd.
Priority to KR1020027000506A priority Critical patent/KR20020022771A/ko
Publication of WO2001005713A1 publication Critical patent/WO2001005713A1/fr

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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
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1205—Particular type of activated sludge processes
    • C02F3/1221—Particular type of activated sludge processes comprising treatment of the recirculated sludge
    • 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
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • 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

Definitions

  • the present invention relates to a method and an apparatus for reducing excess sludge, and more particularly to a method and an apparatus for reducing excess sludge by using both chemical treatment and biological treatment.
  • the sludge reduction method of the present invention which achieves the above object, comprises directly or indirectly extracting at least a part of sludge from an aeration tank for decomposing organic wastewater by biological treatment, and converting the sludge into dry sludge.
  • Hydrogen peroxide is added at a mixing ratio of 0.004 to 50% by weight of the converted weight, and the sludge is organically converted to a microorganism-degradable state with the hydrogen peroxide.
  • the method is characterized in that the quantitative amount is returned to the aeration tank.
  • sludge that has been organically converted to a state that can be microbially decomposed with hydrogen peroxide is subjected to biological treatment using a reactor sludge.
  • Reactor sludge may be fed into the reactor to be decomposed and returned to the aeration tank.
  • a predetermined amount of the organic sludge is put into the reactor. After that, at least a part of the reactor sludge is withdrawn from the reactor, and the reactor sludge is added with 0.04 to 50% by weight of the reactor sludge in terms of dry sludge. Hydrogen peroxide may be added at a mixing ratio to organically convert the reactor sludge into a microbial degradable state with the hydrogen peroxide, and a predetermined amount of the organic sludge may be returned to the reactor. Good.
  • the sludge reduction method of the present invention at least a part of the sludge is directly or indirectly extracted from an aeration tank for decomposing organic wastewater by biological treatment, and the extracted sludge is supplied to a reactor. At least a part of the reactor sludge containing the sludge is extracted from the reactor, and the reactor—sludge has a weight of 0.04 to less than the weight of the reactor sludge converted to dry sludge.
  • Hydrogen peroxide is added at a mixing ratio of 50% by weight, and the reactor sludge is organically converted to a state capable of microbial decomposition with the hydrogen peroxide. A predetermined amount of the organic sludge is returned to the reactor. You may do it.
  • the sludge reduction apparatus of the present invention that achieves the above object is an aeration tank that decomposes organic wastewater by biological treatment, and organically converts sludge extracted from the aeration tank into a state that can be microbial decomposed with hydrogen peroxide.
  • reactor sludge that has been organically converted to a state decomposable by microorganisms with hydrogen peroxide is used as reactor sludge.
  • the reactor may be provided with a reactor to be decomposed, means for feeding a predetermined amount of the organically converted excess sludge to the reactor, and means for returning the reactor sludge to the aeration tank.
  • the reactor sludge extracted from the reactor is treated with the hydrogen peroxide treatment tank or the two-liquid mixing device or separately.
  • the sludge reduction apparatus which achieves the above object, comprises an aeration tank for decomposing organic wastewater by biological treatment, and a biological treatment of sludge organically converted to a state degradable by microorganisms with hydrogen peroxide by reactor sludge.
  • a two-liquid mixing device for organically converting the reactor sludge extracted from the hydrogen peroxide treatment tank or the reactor into a state that can be decomposed into microorganisms with hydrogen peroxide; and the reactor sludge extracted from the reactor.
  • Organic wastewater refers to wastewater mainly containing organic matter, It means wastewater from urban sewage such as night soil and factory wastewater.
  • “Sludge” is the main component in the aeration tank of a treatment facility that treats organic wastewater biologically.
  • Microorganisms such as various aerobic bacteria with high oxidizing ability, anaerobic bacteria that decompose organic substances in the absence of oxygen, and facultative anaerobic bacteria that can decompose organic substances in both anaerobic and aerobic conditions , And a collection of mud-like substances and organic suspensions obtained by multiplying these microorganisms, and if they contain microorganisms, a small amount of untreated organic wastewater and inorganic substances It is used as meaning including “Reactor sludge” refers to the sludge present in the reactor, but does not distinguish between “sludge” and its content.
  • Excess sludge refers to microorganisms generated during the biological treatment of organic wastewater, which consist of microorganisms that exceed the amount of microorganisms required for the purpose of wastewater treatment. Aerobic bacteria with high assimilation ability and oxidizing ability for organic substances contained in them by continuous aeration and stirring of industrial wastewater, anaerobic bacteria that decompose organic substances in the absence of oxygen, anaerobic and aerobic A collection of microbial organisms such as facultative anaerobic bacteria that can decompose organic substances contained in this state, mud-like substances obtained by growing these microorganisms, and organic suspensions. As long as it contains microorganisms, it may contain some untreated organic wastewater and inorganic substances.
  • biological treatment refers to the method of treating organic wastewater by living organisms, such as the activated sludge method, the membrane separation activated sludge method, and the biofilm method.
  • microorganism refers to the activated sludge method.
  • activated sludge of the membrane separation activated sludge method is a broad term that includes biofilm constituent bacteria of the biofilm method.
  • Aeration tank means a tank that decomposes organic wastewater by biological treatment, and “directly or indirectly from the aeration tank” may be directly extracted from the aeration tank or may be aerated. This means that it may be indirectly extracted from the tank via a sedimentation tank.
  • reactor one Means a tank that decomposes sludge that has been converted to organic matter into a state that can be biodegraded with hydrogen peroxide by biological treatment with reactor sludge.
  • Hydrogen peroxide is 0.004 to 50% by weight of sludge converted to dry sludge, that is, 0.004 to 50% by weight of hydrogen peroxide based on sludge converted to dry sludge. Preferably, it is added in an amount of 0.04 to 20% by weight, more preferably 0.04 to 5% by weight.
  • the percentage by weight of hydrogen peroxide relative to sludge converted to dry sludge means the mixing ratio of sludge and hydrogen peroxide during the reaction. Converting to dry sludge means converting to dry sludge with a water content of 0%. Hydrogen peroxide means the converted weight assuming that a 100% aqueous hydrogen peroxide solution was used.
  • the “hydrogen peroxide treatment tank” (hereinafter simply referred to as “treatment tank”) is a tank that oxidizes sludge with hydrogen peroxide and kills sludge bacteria, and is added to sludge for oxidation by hydrogen peroxide. It is desirable to provide a stirrer to stir the hydrogen peroxide.
  • the stirrer is not particularly limited as long as it can be stirred at a high speed. For example, a blade-type stirrer is preferable.
  • the “two-part mixing device” is a device that oxidizes sludge with hydrogen peroxide to kill sludge bacteria. Oxidation with hydrogen peroxide involves mixing sludge and added hydrogen peroxide in a mixing chamber. Do In particular, it is more preferable to provide a turbulent plate or the like for efficient mixing to generate turbulence and mix the two liquids.
  • the “sedimentation tank” is a tank that separates sludge and supernatant water using sedimentation.
  • Submerged membrane is an immersion-type solid-liquid separation device that separates water from wastewater using a microporous membrane.
  • Hollow fiber is a fiber whose core is hollow, and separates water from wastewater using a hollow fiber membrane in which the core is collected.
  • Organizing the sludge into a biodegradable state by the hydrogen peroxide means that the sludge is oxidatively decomposed by the hydrogen peroxide so that the microorganisms can be biooxidized as a BOD source.
  • Putting or returning a predetermined amount of the organically converted sludge to the aeration tank or the reactor means that all of the organically converted sludge may be charged or returned to the aeration tank or the reactor, or This means that part of the materialized sludge may be input or returned.
  • the organic sludge that is fed or returned includes sludge that has not been reacted with hydrogen peroxide, in addition to sludge that has been organically converted by hydrogen peroxide.
  • the sludge may be returned to the aeration tank directly to the aeration tank, or may be returned indirectly from a route for introducing organic wastewater to the aeration tank.
  • the sludge reduction method and the sludge reduction device of the present invention have the following effects.
  • the sludge reduction method of the present invention at least a part of the sludge is directly or indirectly extracted from an aeration tank for decomposing organic wastewater by biological treatment, and the sludge is converted into a dry sludge having a weight of 0%.
  • Add hydrogen peroxide at a mixing ratio of 0.4 to 50% by weight to organically convert sludge into a biodegradable state with hydrogen peroxide, and return a predetermined amount of organically converted sludge to the aeration tank.
  • the sludge reduction apparatus of the present invention converts an organic wastewater into an organic matter by decomposing organic wastewater by biological treatment, and converts sludge extracted from the aeration tank into a state that can be microbially decomposed by hydrogen peroxide.
  • a two-liquid mixing device that converts sludge extracted from the hydrogen peroxide treatment tank or aeration tank into an organic substance that can be biodegraded with hydrogen peroxide, and a sludge that is converted into dry sludge in the hydrogen peroxide treatment tank or two-liquid mixing device 0.004 to 50% by weight of the converted weight Since a means for adding hydrogen peroxide at a combined ratio and a means for returning a predetermined amount of organically converted sludge to a state capable of biodegradation in a hydrogen peroxide treatment tank or a two-liquid mixing apparatus are provided to the aeration tank, While processing organic wastewater, sludge can be economically reduced without generating undegraded excess sludge.
  • the extracted sludge is oxidized by hydrogen peroxide and is in a state where it can be degraded by microorganisms.
  • the sludge is converted into organic matter and returned to the aeration tank, where it is eaten by the microorganisms that make up the sludge. Therefore, there is no need to separately dehydrate or incinerate undegraded surplus sludge.
  • the sludge taken out is converted to organic matter by microbial decomposition with hydrogen peroxide and returned to the aeration tank, but at least the sludge converted to organic matter is returned to the aeration tank.
  • they are eaten, they are eaten by microorganisms that make up the sludge. Therefore, the sludge is treated by repeating the circulation of the aeration tank-hydrogen peroxide treatment tank (or two-liquid mixing device)-aeration tank and the sludge taken out. Therefore, no dehydrator or incinerator is required.
  • the sludge is extracted from the aeration tank that decomposes the organic wastewater by biological treatment, and hydrogen peroxide is added to the sludge, and the organic matter is converted to a state in which the excess sludge can be microbial-decomposed by hydrogen peroxide.
  • the organic sludge is returned from the organic wastewater by the process of returning the organic sludge to the aeration tank. Since the process up to the wastewater treatment can be performed in a lump and the system can be automated, it is possible to treat organic wastewater and sludge without incurring labor costs.
  • sludge organically converted to a state capable of being decomposed by microorganisms with hydrogen peroxide is subjected to biological treatment.
  • the sludge is put into a reactor that decomposes more, the sludge that has been converted to organic matter by microbial decomposition with hydrogen peroxide can be treated independently of the organic wastewater treatment process. This makes it possible to prevent an increase in the BOD load on the aeration tank and to treat sludge more reliably.
  • the volume of the reactor and the MLSS of the reactor sludge can be adjusted according to the amount of sludge that has been converted to organic matter so that it can be degraded by hydrogen peroxide. Can be more efficiently degraded by biological treatment.
  • the reactor sludge is organically converted to a state capable of microbial decomposition with the hydrogen peroxide.
  • the organic sludge is decomposed and absorbed by the reactor sludge in the reactor.
  • At least a part of the sludge is directly or indirectly extracted from an aeration tank for decomposing organic wastewater by biological treatment, and the extracted sludge is recycled.
  • Into the reactor extract at least a part of the reactor sludge from the reactor, and add 0.04 to 50% by weight of the reactor sludge to the sludge in terms of dry sludge.
  • Hydrogen peroxide is added at a mixing ratio of the following, and the reactor is sludge organically converted to a state capable of decomposing microorganisms with the hydrogen peroxide, and a predetermined amount of the sludge converted to organic matter is returned to the reactor.
  • the reactor sludge extracted from the reactor may include the sludge extracted from the aeration tank.
  • the sludge reduction method and apparatus according to the present invention when a part of the sludge in the reactor is taken out from the reactor and separated into solid and liquid in a sedimentation tank, the sludge and the water are separated. Can be separated more efficiently.
  • a part of the sludge in the aeration tank or the reactor is separated from water by a submerged membrane or a hollow fiber membrane provided in the aeration tank or the reactor.
  • the sludge density in the aeration tank or the reactor can be increased, and the size of the aeration tank or the reactor can be reduced.
  • FIG. 1 is a schematic diagram of a sludge reduction device according to one embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a sludge reduction device according to a second embodiment of the present invention.
  • FIG. 3 is a sludge according to a second embodiment of the present invention. Schematic diagram when a sedimentation tank is installed in the weight reduction device
  • FIG. 4 is a schematic diagram of a sludge reduction device according to a third embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a sludge reduction device according to a fourth embodiment of the present invention. Schematic diagram of a sludge reduction device according to the fourth embodiment with a submerged membrane in the reactor
  • Figure 7 is a graph showing the relationship between sludge mortality, dry sludge weight, and the mixing ratio during the reaction of hydrogen peroxide.
  • FIG. 1 is a schematic diagram of a sludge reduction device according to an embodiment of the present invention.
  • the sludge reduction device 1 is a means for directly supplying sludge from the treatment tank 2 and the aeration tank 7 to the treatment tank 2 3a, and a means for indirectly supplying sludge from the aeration tank 7 to the treatment tank 2 via the sedimentation tank 6 3b , Separation tank 6 for separating the treated water in aeration tank 7 into sludge and supernatant water 6, Means for adding hydrogen peroxide to treatment tank 2 4 Means 5a for returning sludge organically converted to a state capable of decomposing substances directly to aeration tank 7 Means for indirectly returning sludge organically converted to a state capable of decomposing microorganisms to aeration tank 7 5b, Organic It is equipped with means 9 for returning sludge from the raw water tank 8 and the sedimentation tank 6 for temporarily storing wastewater to the aeration tank 7.
  • Organic wastewater generated from homes is temporarily stored in the raw water tank 8, and the organic wastewater is sent from the raw water tank 8 to the aeration tank 7 according to the treatment in the aeration tank 7.
  • the aerated tank 7 maintains the dissolved oxygen at a sufficient concentration to propagate activated sludge bacteria (microorganisms). Time Process day and night.
  • the treated water is sent to the sedimentation tank 6 where it is separated into clear supernatant water and sludge.
  • the supernatant water is discharged after treatment such as disinfection.
  • the sludge is returned to the aeration tank 7 through the means 9 for returning the sludge from the settling tank 6 to the aeration tank 7.
  • aeration tank 7 sludge is generated as the organic wastewater is treated.
  • sedimentation layer 6 sludge that causes difficulty in separating the supernatant water and the sludge, that is, excess sludge, is generated. The amount of excess sludge generated is
  • a X a S r-b X
  • ⁇ ⁇ is the amount of excess sludge generated (kg / day)
  • S r is the amount of BOD removed (kg / day)
  • X is the amount of sludge in the equipment (kg)
  • a is the sludge conversion rate of the removed BOD
  • b Is the rate of autoxidation due to internal respiration (day- 1 ).
  • a depends on the type of wastewater
  • b depends on the type and situation of sludge, but a is usually 0.2 to 0.7 and b is 0.02 to 0.07.
  • the sludge is directly returned from the aeration tank 7 to the treatment tank 2 without returning the sludge to the aeration tank 7.
  • Sludge is indirectly introduced into the treatment tank 2 through the means 3.
  • the sludge is extracted into the treatment tank 2 by means 3b. Extract to processing tank 2
  • the sludge is converted to BOD by the added hydrogen peroxide.
  • the treatment tank 2 is provided with a stirrer capable of stirring the sludge and the hydrogen peroxide at a high speed.
  • the amount of hydrogen peroxide to be added is as follows: the mixing ratio of the extracted sludge and hydrogen peroxide during the reaction is 0.04 to 50% by weight of the weight of the extracted sludge converted to dry sludge. Preferably, it is from 0.04 to 20% by weight, more preferably from 0.04 to 5% by weight.
  • the treatment tank 2 contains undecomposed sludge. That is, a part of the extracted sludge is oxidized by hydrogen peroxide, destroys a part of the cell wall of the sludge constituting the sludge, kills the sludge, and turns into BOD.
  • Undegraded sludge that is not oxidized by hydrogen remains as it is.
  • the undecomposed sludge is returned to the aeration tank 7 again by means 5a or 5b for returning directly to the aeration tank 7 together with the decomposed sludge, and then treated again from the aeration tank 7. It is withdrawn to Vessel 2 and decomposed while repeating this cycle. That is, the sludge reduction of the present invention is not intended to reduce all sludge by oxidizing sludge with hydrogen peroxide, but by returning dead sludge to the aeration tank as a BOD source. O to reduce weight
  • ⁇ can be eliminated by killing about three times the amount of sludge with ⁇ X by hydrogen peroxide.
  • SS suspended solids
  • a means 3a for directly supplying sludge from the aeration tank 7 to the treatment tank 2 is provided, but in the treatment tank 2, the hydrogen peroxide can efficiently kill sludge bacteria. It is preferable that hydrogen peroxide is consumed to oxidize other organic substances. Therefore, in order to prevent this, it is more preferable to set up a re-aeration tank between the aeration tank 7 or the sedimentary layer 6 and the sludge being introduced into the treatment tank 2. In addition, it is not preferable that hydrogen peroxide is consumed in the treatment tank 2 to oxidize nitrite indirectly synthesized by microorganisms from nitrogen contained in the organic wastewater.
  • the aeration tank 7 may be provided with a submerged membrane or a hollow fiber membrane for separating water and sludge, and in this case, the density of the sludge in the reactor may be increased. Therefore, the size of the aeration tank can be reduced. In this case, the sedimentation tank 6 may not be provided.
  • FIG. 2 is a schematic diagram of a sludge reduction device according to a second embodiment of the present invention.
  • the sludge reduction device 10 is a means for directly feeding sludge from the treatment tank 12 and the aeration tank 17 to the treatment tank 12 3a, indirectly from the aeration tank 17 to the treatment tank 12 via the sedimentation tank 16 1 b, sludge into the aeration tank 1 ⁇ ⁇ , sedimentation tank 16 to separate the treated water from the aeration tank into sludge and supernatant water 1, means to add hydrogen peroxide to the processing tank 1 2 1, 4
  • the sludge is put into the reactor 110 and the sludge is introduced into the reactor 1.
  • the BOD load on the aeration tank can be reduced. Increases can be prevented and sludge can be treated more reliably.
  • efficient biological treatment can be achieved by adjusting the reactor volume and the MLSS concentration of each reactor sludge according to the amount of sludge that has been converted to organic matter so that the microorganisms can be degraded.
  • the sludge reduction apparatus shown in FIG. 2 may include a sedimentation tank 100 for solid-liquid separation of the sludge in the reactor 110.
  • the treated water sent to the sedimentation tank 100 is separated into clear supernatant water and sludge, and the supernatant water is discharged after treatment such as disinfection.
  • This sedimentation tank 100 makes it possible to separate sludge and treated water more efficiently.
  • the treated water decomposed in the sedimentation tank 100 can be transferred to any of the raw water tank 18, aeration tank 17 and sedimentation tank 16.
  • a re-aeration tank while sludge is supplied from the aeration tank 17 or the sedimentation tank 16 to the treatment tank 12. It is further preferable to provide a denitrification tank between the re-aeration tank and the treatment tank 12 in the middle of the means 13a.
  • FIG. 4 is a schematic diagram of a sludge reduction device according to a third embodiment of the present invention.
  • the sludge reduction device 20 is a means 23 for directly introducing sludge from the treatment tank 22 and the aeration tank 27 to the treatment tank 22.Indirectly from the aeration tank 27 to the treatment tank 22 via the sedimentation tank 26.
  • a settling tank that separates the treated water from the aeration tank 27 into sludge and supernatant water, and treats hydrogen peroxide Means for adding to tank 22 2 4, Means for introducing or returning sludge that has been converted to organic matter into a state capable of degrading microorganisms from reactor 2 2 to reactor 210, and processing from reactor 1 210
  • Layer 2 2 Means for transferring helicopter sludge 2 1 1, Means for temporarily storing organic wastewater Raw water tank 28, Means for returning sludge from sedimentation tank 26 to aeration tank 27 29, It is equipped with a settling tank 20 ° for solid-liquid separation of the reactor sludge in the reactor 210.
  • the treated water in the sedimentation tank 200 may be transferred to any of the raw water tank 28, the aeration tank 27, and the sedimentation tank 26.
  • FIG. 5 is a schematic diagram of a sludge reduction device according to a fourth embodiment of the present invention.
  • the sludge reduction device 30 is composed of a treatment tank 32, an aeration tank 37 and a reactor 311a, a means for directly feeding sludge to the reactor 310, an aeration tank 37 to a sedimentation tank 36, and a reactor 310.
  • the treated water decomposed in the sedimentation tank 300 may be transferred to any of the raw water tank 38, the aeration tank 37, and the sedimentation tank 36.
  • the reactors 110, 210, 310 are provided with a submerged membrane 40, which separates water and sludge.
  • a hollow fiber membrane (not shown) may be provided, and in this case, the density of the sludge in the reactor can be increased, so that the size of the reactor can be reduced.
  • the sedimentation tanks 100, 200, and 300 may not be provided.
  • a means for transferring the sludge from the reactor in the reactor to the raw water tank or the aeration tank may be provided.
  • the mixed ratio of hydrogen peroxide during reaction to 300 cc (MLSS 500 mg / l, 150 mg in terms of dry sludge weight) of sludge in the septic tank was 0.5, 0.3, 0.2, 0.1, 0.05, 0.01, 0.05, 0.001, 0.0004 (50% to 0.000% by weight). (0.4%) was added to hydrogen peroxide. From the results of this beecast, one ton of sludge actually dewatered (water content 85%, dry sludge) was calculated based on the sludge mortality (as shown in Table 1) at each mixing ratio of hydrogen peroxide. (Converted weight 150 kg) The amount of hydrogen peroxide required to reduce the amount was calculated, and the amount was converted to the cost of a 60% aqueous solution of hydrogen peroxide (100 yen / kg).
  • Table 2 shows the results.
  • the pH in the table indicates the pH of the sludge [Table 2]
  • the cost of 30,000 yen which is said to require the treatment of one ton of dewatered sludge, does not include personnel costs, and the results show how economical the sludge reduction method and apparatus of the present invention are. It can be confirmed that it is advantageous for sludge and how effective it is in sludge in a wide pH range. Further, since the sludge reduction method and apparatus of the present invention incorporate sludge reduction in the process of treating organic wastewater, excess sludge can be treated while treating organic wastewater.
  • Figure 7 is a graph showing the relationship between sludge mortality, dry sludge weight, and the mixing ratio of hydrogen peroxide during the reaction.
  • the death rate is high when the mixing ratio of hydrogen peroxide is 0.5 with respect to the dry sludge 1, but the mixing ratio of hydrogen peroxide is 1/10, that is, the dry sludge 1
  • the mortality rate does not decrease to 1/10 when the ratio of hydrogen peroxide is 0.5 with respect to 1 dry sludge.
  • the sludge mortality is roughly proportional to the logarithm of the mixing ratio of hydrogen peroxide to dry sludge.
  • the present invention pays attention to this point, and the sludge mortality is higher than the mixing ratio of hydrogen peroxide used.
  • the mixing range of hydrogen peroxide that is efficient for killing sludge that is, the weight of dry sludge
  • 0.04 to 50% by weight of hydrogen peroxide in a mixing ratio at the time of reaction between sludge and hydrogen peroxide economical treatment is performed.
  • organic wastewater treatment and sludge reduction can be performed as a continuous system, it is possible to automate organic wastewater treatment and sludge reduction, thereby increasing labor costs. Costs can be kept lower than before.

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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)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Activated Sludge Processes (AREA)
  • Treatment Of Sludge (AREA)

Abstract

L'invention concerne un procédé permettant de réduire l'excès de dépôt dans la biorémédiation d'une eau de drainage contenant des déchets organiques, qui consiste à décomposer ladite eau dans un réservoir de ventilation (7), à retirer au moins une partie d'un dépôt produit et à la charger vers une cuve de traitement (2) au peroxyde d'hydrogène, à ajouter du peroxyde d'hydrogène dans ladite cuve de traitement (2) contenant le dépôt dans un rapport de 0,04 à 50 % en poids en termes de dépôt sec, le dépôt étant ainsi converti en une matière organique susceptible d'être décomposée par les microbes, et à recycler vers le réservoir de ventilation (7) une quantité prédéterminée du dépôt converti en une matière organique pouvant être décomposée par les microbes. L'invention traite en outre d'un appareil à utiliser dans ce procédé, lequel permet de réduire les excès de dépôt dans une large mesure simplement économiquement.
PCT/JP2000/003347 1999-07-15 2000-05-25 Procede et appareil permettant de reduire l'exces de depot WO2001005713A1 (fr)

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KR1020027000506A KR20020022771A (ko) 1999-07-15 2000-05-25 슬러지 감량 방법 및 장치

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JP11/201465 1999-07-15
JP20146599 1999-07-15
JP2000/3193 2000-01-12
JP2000003193 2000-01-12
JP2000/123554 2000-04-25
JP2000123554A JP2001259675A (ja) 1999-07-15 2000-04-25 汚泥減量方法及び装置

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100468430B1 (ko) * 2001-06-13 2005-01-27 조영봉 슬러지의 자원화를 위한 청정슬러지 또는 청정액체의 제조방법
US7790708B2 (en) 2001-06-11 2010-09-07 Xenoport, Inc. Prodrugs of GABA analogs, compositions and uses thereof
CN102491551A (zh) * 2011-11-22 2012-06-13 浙江嘉澳环保科技股份有限公司 一种含双氧水的有机废水的处理方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002166286A (ja) * 2000-11-29 2002-06-11 Ebara Corp 有機性汚水の生物処理における余剰汚泥減量化方法及び装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1015589A (ja) * 1996-07-05 1998-01-20 Ebara Corp 有機性汚水の高度浄化方法
JPH10128376A (ja) * 1996-09-05 1998-05-19 Kankyo Eng Kk 有機性廃水の処理方法
JPH10137780A (ja) * 1996-11-11 1998-05-26 Ebara Corp 有機性汚泥の減量化方法
JP2000024698A (ja) * 1998-07-10 2000-01-25 Hitachi Plant Eng & Constr Co Ltd 廃水の生物学的処理方法及び装置
JP2000061488A (ja) * 1998-06-10 2000-02-29 Kankyo Eng Co Ltd 有機性廃水の処理方法及びこれに使用する薬剤
JP2000061497A (ja) * 1998-08-25 2000-02-29 Kankyo Eng Co Ltd 有機性廃水の処理方法及び有機性廃水の処理装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1015589A (ja) * 1996-07-05 1998-01-20 Ebara Corp 有機性汚水の高度浄化方法
JPH10128376A (ja) * 1996-09-05 1998-05-19 Kankyo Eng Kk 有機性廃水の処理方法
JPH10137780A (ja) * 1996-11-11 1998-05-26 Ebara Corp 有機性汚泥の減量化方法
JP2000061488A (ja) * 1998-06-10 2000-02-29 Kankyo Eng Co Ltd 有機性廃水の処理方法及びこれに使用する薬剤
JP2000024698A (ja) * 1998-07-10 2000-01-25 Hitachi Plant Eng & Constr Co Ltd 廃水の生物学的処理方法及び装置
JP2000061497A (ja) * 1998-08-25 2000-02-29 Kankyo Eng Co Ltd 有機性廃水の処理方法及び有機性廃水の処理装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7790708B2 (en) 2001-06-11 2010-09-07 Xenoport, Inc. Prodrugs of GABA analogs, compositions and uses thereof
KR100468430B1 (ko) * 2001-06-13 2005-01-27 조영봉 슬러지의 자원화를 위한 청정슬러지 또는 청정액체의 제조방법
CN102491551A (zh) * 2011-11-22 2012-06-13 浙江嘉澳环保科技股份有限公司 一种含双氧水的有机废水的处理方法

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