TW200521088A - Apparatus for anaerrobicly digesting organic waste liquid - Google Patents

Abstract

An apparatus for anaerobically digesting organic waste liquid is provided. Wherein, a portion of the digested sludge of the organic waste liquid is concentrated, and sent to the anaerobic digesting tank, while a portion of the digest sludge is made solutable, and then sent back to the anaerobic digesting tank. The efficient digesting process is capable of reducing a higher amount of sludge. In the absorption side of the transporting pump 4, where the concentrated sludge is sent back, the concentrated sludge and the solutable sludge are mixed, and after the concentration is adjusted, sent back to the anaerobic digesting tank 1. Accordingly, the concentration ratio of the digested sludge can be increased such that the sludge can be concentrated and sent back efficiently. Also, the returning concentrated sludge is fully decomposed in the anaerobic digesting tank during an efficient digesting process, such that more sludge can be removed.

Description

20052 Female · IX. Description of the invention: [Technical field to which the invention belongs] The present invention relates to a kind of device for anaerobic digestion of organic ships, and in particular 7C relates to a kind of improved organic waste. The amount of sludge waste depends on the invention of a chemical treatment device. Tian You [Previous technology] Digestion treatment of high-concentration financial equipment such as organic sludge, feces, and waste water from food factories in the presence of anaerobic microorganisms has been used to reduce and reduce dead bodies since ancient times. However, although the traditional anaerobic digestion method requires a long residence time of more than 1G days, its consumption == removal rate) can only reach 35_50%, and there is a sludge reduction rate of 0. Wei solves this problem. The problem is described in Japanese Patent Laid-Open No. Hei-Ping, d5, a kind of separation of organic waste liquid in an anaerobic digester; after chemical treatment, 'solid-liquid separation of digested sludge will be carried out, and water will be separated and the surface will be polluted. Mud to Lin digestion tank, another = to> Xiaohua Qiao mud-part of the ozone treatment for denaturation and return = milk> Xiaohua tank organic waste liquid anaerobic, digestion method. Using this method, the solid-liquid separation of the sludge is returned, and the separated sludge is returned to the anaerobic digester to keep the anaerobic microorganisms in residence time. The anaerobic digester, which is denatured to easily biodegradable, is used as a substrate for anaerobic microorganisms to decompose again, and the digestion rate (reduction rate of sludge volume) is reduced. In this method, 'in order to increase the amount of digested sludge (digested sludge containing anaerobic microorganisms) denatured by odor treatment while maintaining the residence time of anaerobic microorganisms for a long time, the anaerobic must be removed during the treatment process. The dirt in the digestion tank is increased from 1_2% to 4-8% in the conventional one-time anaerobic digestion method. However, in this method, when solid-liquid separation of digested sludge is performed, In order to efficiently perform centrifugal concentration of digested sludge in a wooden centrifugal concentrator, it is best to increase the concentration rate of the digested sludge during the treatment process, for example, to raise it back to seven or more. In other words, if the concentration ratio is too low, the processing capacity of the centrifugal concentrator required to obtain a certain amount of separation liquid will increase, so a larger centrifugal concentrator will be required. The operation time of the concentrator must be extended. Xi's coagulant. ^ In addition, there is also a problem that adjusting the secret concentration to the required concentration ratio requires a high degree of operation, and the second, if the conditions change, it is difficult to stabilize the concentration to the required =- Click on the "material_saki thickening" and it is best to carry out the concentration with the thickener & magnification. On the other hand, due to the digested sludge L ΓπΓ 易 / 辰 & ’, it is possible to find high-concentration sludge with a concentration of ts (total solid matter) of 10% or more by concentration. After the concentration rate of Shannan Ren'an was raised, the concentration of concentrated sludge increased, and the == _ property increased exponentially with respect to the concentration of sludge, so the concentration increased: the result was that the concentrated sludge was returned to anaerobic m Second, it is very difficult, and the chestnuts used for conveying concentrated sludge must be driven by power (the concentrated sludge that is returned to the second stage is difficult to fully divide in the anaerobic digester, and the efficiency of the process is reduced. There is such a problem. Special It is the method of solubilization treatment using digested sludge at the same time. 200521088 14701plf.doc In the process of the process, the anaerobic digestion tank must have the sludge concentration digestion method to reach 4 · 8%, so that in the anaerobic digestion tank ≫ 5 When the mud reading reaches 4_8%, the concentration ratio is increased to, for example, 2 = 7, and the concentration of / chen shrinking sludge will be as high as 8_16%. The result is concentrated sludge. The return to the anaerobic digester, and the shrinkage of the entrapment made it more difficult to disperse the sludge in the anaerobic digester. In addition, the digestive sludge contained in the anaerobic digester contained sulfide, di < Reducing inorganic substances such as iron, manganese, etc. There is such a problem that the sludge undergoes sludge conversion, and the ozone that is degraded by the organic components is consumed by these reducing inorganic substances. In addition, the organic components in the sludge are digested, and the loops through the denaturation and digestion are digested. The treatment can be decomposed and reduced by 1 but the amount of file components in the sludge has not decreased, so it will become anaerobic, and accumulate Xiaofa_f to increase the sludge concentration. There is such a problem. Sludge concentration increases Later, the viscosity of the sludge increased, which caused obstacles to the stirring of the anaerobic digester, the degradation of the digested sludge, and the separation of solid and liquid. Therefore, in order to keep the concentration of sludge in the anaerobic digester at a fixed range_ The sludge from the anaerobic digester is extracted and the sludge is discharged to tB, but not only the inorganic components that are not decomposed are discharged, but the organic components that could be decomposed are also discharged outside the system, which constitutes an obstacle The reason for further improving the digestibility (reduction rate of sludge amount). [Patent Document 1] Japanese Patent Laid-Open No. Hei 2% 067885 [Summary of the Invention] The object of the present invention is to provide a solution The above-mentioned historical problem 8 An anaerobic digestion treatment device for an organic waste liquid in the shape of 20052, which performs the solubilization treatment of digested sludge and the return of solubilized sludge, and the concentration and concentration of digested sludge. During anaerobic digestion such as sludge return, the concentration of digested sludge is increased to effectively concentrate it, and the returned concentrated sludge is fully dispersed in the anaerobic digestion tank to effectively digest and increase the amount of sludge. Another object of the present invention is to provide an ozone utilization rate in the ozone treatment which can be used as a dissolving treatment method for digested sludge, and can effectively perform anaerobic digestion of organic waste liquid that can be denatured with sludge. Treatment device Another object of the present invention is to prevent the accumulation of inorganic components in the system, improve the digestion efficiency, and further increase the reduction rate of sludge: at the same time, the dewatered extraction sludge can be discharged at the same time, which can improve its treatment efficiency and reliability. An anaerobic digestion device for organic organic waste liquid. Anaerobic digestion of organic waste liquid as described in item 1 of the Patent Department, === Soluble device with anaerobic digestion for anaerobic digestion of organic waste liquid. Return of anaerobic digestion tank; solids and liquids returned to the sludge for concentration by dissolving sludge are separated, and the concentrated sludge discharged from the digestion and gas elimination device discharged from the tank is returned to the above-mentioned "injection side" pipe, On the conveying pump or the suction side of the conveying pump, there is a liquid supply device for adding liquid to the sludge. By means of the solubilization treatment of sludge, it refers to the sludge that is difficult to be turned into sludge. Although the material or sludge cells were denatured, 20052, although it was destroyed, it became a form that was easily recyclable by microorganisms. The anaerobic digestion treatment of the organic waste liquid described in the second item of the patent scope should be set as a towel material. The anaerobic digestion treatment device for the organic waste liquid described in the item [1] is characterized in that the liquid added to the indifferent sludge is the above-mentioned dissolved sludge. The application requires the anaerobic digestion of the organic waste liquid described in the item 3 Disposal of organic wastes as described in item 1 or 2 It is characterized in that the above-mentioned dissolving treatment device is an anaerobic digestion treatment center for organic waste liquid described in item 4 of the above-mentioned solubilizing treatment device, and an organic waste device described in item 3 Anaerobic digestion of waste liquid: The U-sign is that an aeration device for aerating the sludge extracted from the tank is provided in the front part of the above-mentioned oxidation treatment device. Anaerobic digestion treatment of the organic waste liquid described in item 5 Device 'As mentioned in the above, please refer to the third fiber processing device, which is characterized by the above-mentioned oxidizing and diarrhea-reducing _ straight system ~ the place of the county is set to ozone treatment clothes. Device, two: the member said Anaerobic digestion of organic waste liquid ^ Anaerobic, anaerobic, and chemical treatments Any of the items described in item 1—the digested sludge discharged from the organic waste liquid described above does not add a coagulant into the stove. A centrifugal concentration device for concentration and a sludge discharge device for condensed sewage outside the shouting system. The main eve knife is discharged to the anaerobic digestion treatment device for waste liquid from the 糸, and Xiaohua machine. Department _ Soluble turn to shout, and digest the sewage 20052 Gu, the concentration of mud and thick broken mud ride money: =: rr ， 泥 进The concentration can be adjusted from 2 l to 1 彳 a, which can-while concentrating-effectively return concentrated sludge / time-feeding thick bribe money gas digestion 分散 is fully dispersed and effectively digested, which can greatly reduce That is, in the present invention, by condensing the digested sludge and returning the concentrated sludge to the anaerobic dump, it can be called HRT (water retention time) unchanged T, _Poured SRT (solid retention time), to obtain a high digestion efficiency and sludge reduction rate. In addition, the digested sludge is solubilized to make it easily biodegradable. The sludge return to the silk gas digester can increase the reduction rate of the sludge amount step by step. The π slime concentration in the anaerobic digester in which the digestion sludge is solubilized is set to be high. Therefore, the concentrated sludge obtained by digestion sludge with a relatively high concentration of seeds is a paste or a highly viscous liquid. When the pump is used for transportation, the output pressure of the pump becomes extremely large, which is difficult to achieve. In addition, it is difficult to disperse the viscous concentrated sludge in the anaerobic digester, which causes a reduction in digestion efficiency. On the other hand, as described above, it is difficult to control the degree of concentration to be suitable for pumping, and the efficiency of the thickener also decreases. By adopting the present invention, the concentration of digested sludge need not be taken into consideration by the pump's transport condition 'By mixing the obtained highly viscous concentrated sludge with the liquid, the degree of concentration can be adjusted to dilute the concentration to a concentration convenient for pumping. In the present invention, it is extremely important that the concentration adjustment position 20052 of the concentrated sludge is placed on the suction side of the delivery pump or the delivery pump. In this way, the concentration adjustment is performed on the delivery side of the delivery pump or the delivery pump to adjust it to The predetermined concentration can be conveniently conveyed by the conveying pump. The difference is that, for example, if the concentrated sludge is to be mixed and diluted with the original sludge at the inlet side of the anaerobic digester, it is difficult to transfer the concentrated sludge to the introduction side of the original sludge, so it cannot be improved. Difficult to transport.

In the present invention, 'the concentration of the concentrated sludge is adjusted to a concentration suitable for conveyance on the conveying pump side or the suction side of the conveying pump, so it can be efficiently returned to the anaerobic digester and The returning sludge is uniformly dispersed and the anaerobic digestion treatment is performed efficiently.

^ In addition, when the organic waste liquid used as the anaerobic digestion treatment has a lot of nitrogen components, the ammonia flowing to the liquid side during the anaerobic digestion treatment will hinder the anaerobic digestion reaction and reduce the processing efficiency. It is necessary to reduce the organic waste load of the anaerobic digester by diluting the organic waste liquid in advance. However, as in the present invention, the digested sludge is concentrated and the ammonia-containing separation solution is extracted outside the system. Other waste liquids are used to dilute the concentration / kini and return to the anaerobic digester, so that the anaerobic digestion can be performed without reducing the load of organic matter. An anaerobic digestion treatment device using an organic waste liquid as described in the scope of patent application No. 2 can be treated more effectively by using solubilized sludge as a dilution liquid for adjusting the concentration of concentrated sludge. That is, since the viscosity of the sludge is reduced after the solubilization treatment, it can be solubilized to effectively dilute the concentrated sludge. In this case, 'because the liquid used for dilution is the processing object itself, the digestion efficiency is improved. 12 20〇52_doc 2 Gu, Xiao Xiao: For example, in the case of adding water as a liquid for dilution, it is necessary to concentrate again by using solubilized sludge. * And mix the dissolvable sludge with the thick and sludge first. The Wei digestion tank can marvel that the dissolvable sludge reduces the sludge better, disperses uniformly, and promotes digestion. Lu Li = ^^ Anaerobic digestion of organic waste liquid as described in item 3 of the patent patent encirclement = 'The digestion sludge can be dissolved by the oxidation wheel effect wheel. _ 理 = Application of anaerobic digestion in the fourth rhyme of Shenliuwei Wai. It can use the aeration device to inhale the H of the attractive oxidation treatment device to reduce the organic matter contained in the digested sludge. Oxygen, for example, a pure treatment device as an oxidation treatment device at the subsequent stage, is consumed in the oxidation of the reducing inorganic matter, thereby increasing the utilization rate of the hexapod and improving the efficiency of the solubilization treatment. The anaerobic digestion and treatment device for organic waste liquid described in Lu Li's patent scope No. 5 can obtain the following fruits by collecting soluble materials from Zhixian County. For specific duties, after the transfer of oxygen, the viscosity is reduced. ~ Ni is small in viscosity, so it can be returned to Qian Duan with a uniform state to ensure its fluidity. Since it is returned to the anaerobic digester in a uniform state, the consumption efficiency in the anaerobic digester is listed in the list. In addition, when a high-I potassium potassium tincture is added in order to make the sludge soluble, dioxin will remain in the system, etc., and a drug injection device is also required, and 3 milk is in the secret area, and the residual surface of the shirt is uniform. Inside, it is necessary to use music injection equipment. Anaerobic digestion using the organic waste liquid described in item 6 of the patent application 13 20052 \ 4% L · treatment device, no condensate is added to the digested sludge towel, and the concentrated sludge obtained by centrifugal concentration is discharged to the outside of the system It can preferentially discharge inorganic components with a larger specific gravity than organic components to the outside of the system, which can prevent accumulation of system components and improve digestion efficiency. In addition, since the sludge containing inorganic components has good dehydration property, dehydrated sludge cake with low water content can be obtained, its volume can be reduced, and handling and handling are convenient. In order to make the above and other objects, features, and advantages of the present invention more comprehensible, preferred embodiments are described below in detail with reference to the accompanying drawings, as follows. [Embodiment] An embodiment of the anaerobic digestion treatment apparatus for an organic waste liquid of the present invention will be described below with reference to the drawings. 1 and 2 are system diagrams showing an embodiment of an anaerobic digestion treatment apparatus for an organic waste liquid of the present invention. In Figures 1 and 2, parts that implement the same function are marked with the same symbol. [Anaerobic digestion treatment device for organic waste liquid in FIG. 1] In FIG. 1, organic sludge (organic waste liquid) is introduced into the anaerobic digestion tank 1 to perform an anaerobic digestion treatment. A part of the digested sludge in the anaerobic digester 1 is extracted and concentrated by a concentrator 2. In addition, the 5 sludges from the anaerobic digester 1 were extracted and used for ozone treatment as a dissolving device. At least a part of the solubilized sludge is sent to the mixing ^ The remaining part is returned to the anaerobic digestion tank, and the thickened by the thickener 2 is conveyed to the mixing tank 3 and mixed with the soluble / depleted sludge treated by the ozone treatment device 5 ， Concentration adjustment, using the pump 4 will be diluted to a suitable pump 14

20,052.08L of the transported sludge is returned to the anaerobic digester 1. The organic waste liquid as a treatment object of the present invention is a waste liquid containing an organic substance that can be reduced by anaerobic digestion, and may be a solid substance

The slurry-like waste liquid may also be a liquid waste liquid containing no solid matter. In addition, it may contain organic matter, inorganic matter, cellulose, paper, cotton, wool, cloth, and solid matter in feces that are difficult to biodegrade. Examples of such organic waste liquid include groundwater, groundwater sludge, feces, purification tank sludge, food factory wastewater, residues, beer waste yeast, waste water from other industries, residual sludge generated during the treatment of such waste water, etc. Organic sludge. In the anaerobic digester 1, in the presence of white sludge containing anaerobic microorganisms, the organic waste liquid is subjected to a torrefaction fermentation process. The sludge containing anaerobic micro-organisms contains acid-producing bacteria and pinane-producing bacteria. In the anaerobic digestion process, some substances are converted into oxane gas by the steps of liquefaction by anaerobic microorganisms—low molecularization—to produce organic acids, and then to generate trioxine, which is then processed. -The conditions for anaerobic digestion are any of the conditions of the middle 2 曱 曱 曱, where the optimum temperature is about 350C, and the high-temperature nail-producing hospital where the optimum temperature is about 55 ° C. Due to the slow proliferation of mesophilic nail production, the longer the solid retention time (SRT), that is, the anaerobic heart trough must be larger, but because it can be processed at a lower temperature, ^ this adopts the warming Cook the equipment. The difference is that heating and thermal insulation equipment is needed for yam-producing bacteria, but because the proliferation is fast, the retention time (SRT) is short, and the anaerobic digester can be smaller. In the case of medium-temperature production of 曱 _ as the main body, the SRT in the sewage tank must be above or better, it is best to reach the condition. On the 15th, the 20052 post is different. In the case of high-temperature methanogens as the main body, SRT can be shorter than the above range (more than 2 days). The organic matter load can be 0.2-3.0kg-TVS / m3 · day (TVS is the total amount of volatile solids), preferably 0.4 ~ 0.8kg-TVS / m3 · day, the solid content in the anaerobic digester Anaerobic digestion is performed under the conditions of a total substance (TS) concentration of 1-10 〇 / 〇, preferably 3-6 〇 / 〇, temperature = 30-38 ° C or 45-60 ° C. ★ 、 Concentrator 2 for concentrating digested sludge, as long as it can concentrate the solid and liquid of digested sludge and concentrate it, there is no particular limitation. Centrifugal concentrators can be used for floating farm shrinkers, screw press concentrators, and filter cloth type concentrators. Machine and so on. The other two can also use solid-liquid separation and coagulation such as sedimentation tanks, membrane separation devices, and filtration devices to condense the digested sludge. By adding the most polymeric coagulant to the digested sludge, the digested sludge can be concentrated in the digested sludge. Suspended solids coagulation: Di-coagulation can increase the concentration ratio and obtain a clear separation liquid. Coacervation: The well-known ions commonly used in the concentration and dehydration of digested sludge are, from the standpoint of a small amount of addition, it is best to use a cationic ^, ^ polymerization agent. For tap water and industrial water, the secondary groundwater coagulation order is to add a high fraction of 0.05 to 51, which is dissolved at a concentration of about 0.2 to 0.4% by weight, and the addition rate is preferably a suspension of digested sludge. (SS) polymerization agent injection ^%. When a coagulant is added to the digested sludge, the condensed or sludge transported fruit can also be added to the concentrator, and a coagulation tank is additionally provided for coagulation treatment. The thickness of the thickener 2 also depends on the handle used, but it is best to concentrate the TS (total solids) concentration 3_6% 16 200521088 14701p | f.doc · The pasty or highly viscous liquid sludge around Satoshi 0 = the concentrated sludge from the agricultural shrinking machine 2 can be used as needed to extract a sample of the remaining residue of the sludge, dewatering, burning, Landfill, compost, etc. In the case of discharged sticky sludge with high viscosity

: After IS is diluted with the dilution liquid and then discharged, so the movement of the discharge pump: ,,,, also ordered. The dilution liquid may be treated water (separation liquid of the concentrator 2) or biologically treated water of other organic waste liquid. The extraction of homogeneous / depleted sludge should preferably be anaerobic; the concentration of sludge (π) in the Xiaohua tank should be maintained at 3-10%. Extraction sludge can also be discharged directly from the anaerobic digester. In addition, the concentrated and separated liquid of Shrinker 2 can be directly discharged into groundwater ifSS as treated water, but it can also be discharged by aerobic biological treatment and other post-treatment. In addition, because the concentrated separation liquid contains high concentrations of ammonia, phosphorus, and the like, crystals of magnesium ammonium phosphate (MAp) are precipitated in the conveying pipe.

Can block the base conveyor. In this case, tap water, industrial water, and groundwater secondary treatment water can be introduced into the concentrated separation liquid to reduce its concentration and prevent precipitation. In a hexaoxygen treatment device 5, the digested sludge from the anaerobic tank 1 is brought into contact with ozone for solubilization treatment. The ozone contact method used in the ozone treatment apparatus may be a method of introducing digested sludge into an ozone treatment tank to blow ozone, a method of mechanical stirring, a method of using a packed layer, and the like. For ozone, ozone-containing gas such as ozonized oxygen and ozonated air can be used. In addition, water containing ozone can also be used. The amount of ozone is usually the organic solids (VSS) of digested sludge subjected to ozone treatment. 0.01-0.08 g-0.3 / g-VSS, preferably 0.02-0.05 g-0.3 / g_VSS. By such ozone treatment, the bacteria in the digested sludge are killed, and denatured with other organic substances, become easily biodegradable. In addition, the viscosity of the sludge is significantly reduced at this time. A part of the solubilized sludge subjected to the solubilization treatment in the ozone treatment device 5 is sent to the mixing tank 3, and the remaining part (when a part of the solubilized sludge is sent to the mixing tank 3) is returned to the anaerobic digestion. Slot 1. · In the mixing tank 3, solubilized sludge from the odor treatment unit 5 is added to the concentrated sludge from the thickener 2 to adjust the concentration. In addition to the solubilized sludge, the dilution liquid used for the concentration adjustment of the concentrated sludge can be digested sludge, organic sludge (organic waste liquid), and treated water (separation of thickener 2). Liquid), industrial water, Sheung Shui, groundwater treatment water, etc., as well as waste liquid from other systems or biological treatment water, etc., but it is best to use solubilized sludge. The TS concentration of concentrated sludge is usually 8-20%, which is very high, but the concentration of solubilized sludge is usually 3_6%. After the dissolvable treatment, the viscosity will be further reduced. Therefore, using such soluble sludge The mud can be diluted efficiently. When adjusting the concentration of waved sludge, it is not necessary to set mixing. In order to inject the dilution liquid into the suction side of the conveying pump in the rotary conveying pipe of concentrated sludge. However, in the case where the viscosity of the concentrated sludge is not two times, it is best to set a mixing tank 3 as shown in FIG. 18 20052 ^. Use a static mixer, etc. The retention time in the mixing tank 3 when the concentration adjustment of the / Chen shrinking 'depleted mud' can be 1 knife buckle-about 6 hours, so the volume of the mixing tank 3 does not need to be very large. In addition, ', the concentrated sludge is directly injected into the anaerobic digestion tank, so that the power required for mixing in the mixing tank 3 is significantly smaller than that of the original sludge this month. The degree of sludge concentration adjustment, for example, can flow smoothly in a single-stage screw pump. In general, it is best to pay attention to the TS concentration of 6 12 /. For example, about 8 ° / ❶, so that the pump 4 The output pressure is below 0.4 Mpa. ^ F In the device of FIG. 1, the concentrated sludge concentrated in the thickener 2 is rolled 3, and the concentrated sludge is adjusted with the concentration of the solubilized sludge. Thus, ' The sludge whose concentration has been adjusted can be efficiently returned to the anaerobic digestion tank 1 by the transfer pump 4, In addition, the anaerobic digestion can be performed efficiently by anaerobic digestion ^ 1. The pump 4 for transporting the sludge after concentration adjustment is not particularly limited, and screw pumps and hose pumps can be used. When the present invention is used, as described above, the digestion in the anaerobic digester 1 is partially condensed-the concentration is condensed by the concentrator 2 to adjust the degree of rolling sludge and return it to The anaerobic digester 1 can extend the SRT without changing the HRT (Hydraulic retention time) (stagnation of solids can reduce the amount of sludge. That is, digestion from the anaerobic digester 1 for concentration There is no particular limitation on the amount of sludge to be extracted, but by anaerobic, 19 20052 肖 * in the tank 1, the sludge is extracted and concentrated about 1 / 30-1 / 10 of the sludge, and it is looped after concentration adjustment. The use of SRT can be at least three times longer than without such a loop, and even for organic waste liquids that are difficult to biodegrade, it can promote the reduction of sludge volume. In addition, in order to perform solubilization, anaerobic Digestion tank 丨 the amount of digested sludge extracted In order to sufficiently ensure the effect of reducing the amount of sludge after the solubilization treatment, the amount of organic solids (vss) contained in the digested sludge may be 1 of the amount of the organic solids (VM) introduced into the anaerobic digester 1. / 3-5 times, preferably 1/2 to 2 times. In addition, the amount of digested sludge subjected to solubilization treatment in one day can be equivalent to the total holding amount of organic solids (vss) in the anaerobic digestion tank i. Below 1/10, it is preferably y100-1 / 15, and more preferably 1 / 50_1 / 30. By controlling the amount of digested sludge that is solubilized in one day to such an amount, anaerobic digestion can be performed The amount of microorganisms necessary for the anaerobic digestion treatment is maintained in the tank, and the anaerobic digestion treatment can be efficiently performed. 3 In addition, in FIG. 1, the dissolution device is an ozone treatment device, but in the present invention, the dissolution treatment is not limited to any ozone treatment device, as long as it can denature and destroy sludge cells, Microorganisms can be used to make it into a resource-dissolving device that can be easily recyclable. Any commonly known method for dissolving sludge can be used. In addition to ozone treatment, for example, oxidizing agents with strong oxidizing power such as hydrogen peroxide, Acids, domains, etc. are subjected to chemical treatment, ultrasonic treatment, physical processing such as crushing machine materials, and various methods such as reduction, which can be made separately, or two or more methods can be used in combination. 20 200521 and ^ In addition, the ‘solubilization treatment’ is the extraction of sludge from the anaerobic digester into the lamp ’, but it is also possible to dissolve part or all of the concentrated sludge obtained after the digested sludge is concentrated. In addition, 'the thickener and the mixing tank should preferably be operated in a state isolated from the atmosphere', for example, by concentrating in a sealed state with the thickener, the contact between the fouling and the plutonium can be limited, and the anaerobic bacteria can grow and return to The anaerobic digester can easily maintain and increase the number of surviving bacteria in the anaerobic digester and improve digestion efficiency. In addition, it is best to use the digestion gas (a gas) generated in the anaerobic digester to heat the reactor to provide some or all of the power required for the dissolving device or thickener. [The anaerobic digestion treatment device for organic waste liquid in FIG. 2], the anaerobic digestion treatment device for organic waste liquid in FIG. 2 is different from the organic waste in FIG. 丨; night: "The dagger treatment device has three differences: one is that the mixing tank is omitted 12 = Γ 5 ΐ ”melted sludge is mixed with the suction sludge injected into the delivery pump 4 & brother Chen, S“ 2, and the sludge is mixed. The front coffee is treated with ozone. The third is that the anaerobic digestion tank is out of the system. The separation, night = two, two, and the row of sludge are extracted and discharged. M The bamboo knife is mainly fed into the suction side of the pump 4 and detected. It is the same as the anaerobic digestion treatment device for organic waste liquid in FIG. 1. ^ 〜 6 ^ The treatment conditions of exposure _ 6 are not controlled, but ^ the digestion of dirt and waste is carried out at a high rate ^ Starting from the aeration treatment, it is best to let _ * 心心, 化 砚The exposed working milk is pulverized according to 0.2-10m3 / m 21 200521088 14701pif.doc, and the residence time is 5 minutes to 8 hours. Providing such a front aeration tank 6 in the front section of the ozone treatment device 5 can pre-oxidize the reducing organic matter in the digested sludge, and can increase the solubility of the sludge treated with the ozone treatment device 5 < ozone treatment . In addition, the aeration air of the front aeration tank 6 can be ozone exhaust gas discharged from the ozone treatment device 5, so that the exhaust gas can be effectively used, and the reducing inorganic substances in the digested sludge can be more effectively oxidized. Especially when ozonized oxygen is used as ozone, the oxygen concentration of the exhaust gas is very high, so the effect is very good. By providing such a front aeration tank, the amount of ozone in the ozone treatment device 5 can be reduced. For example, for digested sludge introduced into the ozone treatment device 5, the use of 0.01-0.04 kg-〇3 / kg-VSS can be high. Efficiently dissolves sludge. In order to maintain the sludge concentration in the anaerobic digester 1 in the amount required for the digestion sludge within the above-mentioned appropriate range, it is introduced into a centrifugal concentrator 7 without adding a coagulant and concentrated by centrifugation. The digested sludge to which no coagulant was added was centrifuged to concentrate, and the inorganic components in the digested sludge were preferentially concentrated. When the concentrated sludge is discharged to the outside of the system, the inorganic components are preferentially discharged to the outside of the system, which can prevent the accumulation of inorganic components in the system and improve digestion efficiency. The extracted sludge can be dewatered, incinerated, landfilled, and composted. In addition, the extracted sludge has a large content of inorganic components, and is easy to dehydrate. It can be made into a dehydrated sludge cake with a low moisture content, which is very convenient to handle. In the anaerobic digestion treatment device for organic waste liquid in Fig. 2, the other processing conditions are the same as those in the figure above. The same applies to the anaerobic digestion treatment device of organic waste liquid. [Examples] The present invention will be described in more detail with examples and comparative examples below. The primary settling sludge and the remaining sludge of the groundwater were subjected to a one-time anaerobic digestion treatment at a temperature of 35 ° C. The volume of the anaerobic digester is LiOOm3, the TVS load is 0.65kg / m3 · day, and the HRT is 45days (the input sludge volume is 24.4m3). Input sludge concentration (TS concentration, the same below) 3.5% (TVS / TS ratio 73%), digested sludge concentration 1.6 %% (TVS / TS ratio 73%), digestibility (reduction rate of TVS amount) 60%. When using the anaerobic digester to perform anaerobic digestion, the sludge in the anaerobic digester is subjected to solid-liquid separation, and the concentrated sludge is returned to increase the sludge retention time. The dissolving treatment is carried out and returned to increase the reduction rate of the sludge amount. The centrifugal concentrator is used for the solid-liquid separation device. In addition, the dissolution apparatus is an ozone treatment apparatus. The sludge in the tank was sent to the ozone treatment device at 1.0 m3 / hr to react with ozone, and the amount of ozone was 0.03 kg-03 / kg-VSS. In addition, 3.7 m3 of the sludge in the tank corresponding to 15% of the input sludge was extracted, and the remaining part equivalent to 85% of the input sludge was discharged as a separation liquid when the sludge in the tank was concentrated by centrifugation. Outside the system. During centrifugal concentration, the sludge in the tank was supplied to the centrifugal concentrator at 2.0m3 / hr, and concentrated under the conditions of centrifugal strength of 2,100G and differential UmiiT1, while adding at SS 0.6% by weight and dissolving at 23 20052 Qing * 0.2% by weight Cationic polymer flocculant. At this time, the concentration of concentrated sludge was 12%, and the SS recovery was 95% or more. The concentrated sludge discharged from the centrifugal thickener to the concentrated sludge receiving tank (mixing tank) was returned to the anaerobic digestion tank with a screw pump. The pressure of the screw pump reaches 0.8Mpa, the pump trips and cannot return sludge. Therefore, the following examples and comparative examples are processed. Example 1 The concentrated sludge was put into a mixing tank, while a part of the ozone-dissolved solubilized sludge was put into the mixing tank, and slowly stirred and mixed with a mixer. The sludge concentration in the mixing tank was 3.6%. The pressure of the pump is reduced to 0.12Mpa, which can be quickly returned to the anaerobic digester. The change in digestibility obtained from the concentration of sludge in the anaerobic digester, the balance of solid components, and the amount of digested gas produced when such operation was continued for one year is shown in Fig. 3. Please refer to Figure 3. After 5 months from the start of the operation, the TVS concentration in the tank changed to around 2.3%, and the digestibility of more than 80% was continued. When the concentration of sludge in the tank increased to 4 6%, the concentration of waved sludge after mixing with ozone-treated sludge increased to 7.2%, but the pressure of the screw pump was still below 0.3Mpa, and the return could be continued smoothly. Comparative Example 1

In order to reduce the pressure to the extent that the screw pump can pump, change the centrifugation: flexure, pieces. When the centrifugal strength is reduced to 1G, and the addition rate of the coagulant is reduced to the heart weight / 0, the concentration of the sludge is about 7%, and the pressure of the screw pump is 0.3Mpa, which can be returned to the anaerobic digester. However, at this time, the recovery rate was 70%, and the sludge flowed out from the separation liquid side. The sludge concentration in the anaerobic digester lasted for one year when the operation such as, SS was continued 24

Four, as shown in Figure 4. Please refer to Fig. 4. Even if the SS continues to run, the recovery rate of the sludge concentration in the tank and the change in the digestibility will decrease, that is, the offenders will be raised again. ≫ The Shaw rate cannot be increased to the emblem. the above. Example 2 ^ The digested sludge from the anaerobic digester was concentrated by centrifugation at 4.0 m3 / hr. It is known that: 1.0 m / hr, the groundwater two-water treatment water was introduced into the mixing tank, and slowly stirred and mixed with a blender. Other treatments are the same as in Example 丨. The pressure of the screw pump for returning the concentrated sludge is reduced to 0 2 MPa, and it can be quickly returned to the anaerobic digester. The changes in the concentration of concentrated sludge and the digestibility in the anaerobic digestion tank during proper operation are shown in Fig. 5. Please refer to Figure 5. After 5 months from the start of the operation, the TS concentration in the tank exceeds 3 · 70/0, and the solid ° load of the centrifugal concentrator is too high to operate. Therefore, the amount of sludge extracted in the tank was increased to 25% of the amount of sludge input. 6m3 / day, the TS concentration in the tank changes around 3 7%, and can continue to run, the digestibility is increased to 78%. 〇 The following are examples of experiments that show the solubilizing effect of ozone and the preferential discharge effect of centrifugally concentrated inorganic components without the addition of a polymerization agent. Experimental Example 1 'Ozone response rate to digested sludge (nw_n''w j

25 20052108 ^ [Table 1] Digestion ^ Deficient mud characteristics TS (%) VS (%) SS (%) vss (%) ^ V ψΓ4 1 v «i / full CODCr (mg / L) 2 " dagger f溶解 Soluble soil CODCr (mg / L) Total B〇Dcr (mg / L) Before ozone treatment 5.2 3.1 5.0 2.9 47,000 ___V 〇 / _ 1,800 800 After ozone treatment 5.2 3.1 4.8 2.7 46,500 ^ »-5,900 2,600 from the table 1 It can be seen from the edge of the moon that TS, vs, and total CODCr concentrations have hardly changed before and after the ozone treatment, but the ss and vss concentrations are lower than before the ozone treatment. 2. The full concentration increases. From this result, it can be seen that by the ozone treatment, a part of the vss component of the sludge towel is dissolved, converted into a soluble age, and the material is biodegraded. Experimental Example 2 In the digested sludge (TS50 / 0), a polymer flocculant polymer dissolved in groundwater secondary treatment water towels at a concentration of 0.02% by weight was added at a concentration of 0.2% by weight, and supplied at 4 mVl " The sedimentation type concentrator has the centrifugation degree and volume as the concentration of the obtained concentrated sludge and the secretion solution. In addition, without adding a coagulant, it is concentrated by centrifugation. The obtained concentrated sludge and concentration are shown in Table 2. Under the same conditions, the concentration (TS) and the amount of the shrinkage separation liquid of the sludge are, for example, 26 2005 m. [Table 2] Comparative supply of the separation liquid ~ ^: When the coagulant is added, the coagulant is not added. Situation Digestion sludge concentrated sludge? Agricultural shrinkage separation liquid concentrated sludge concentrated separated liquid concentration (TS) (%) 5 18 0.2 12 ------ 3.5 Amount (m3 / hr) 4 1.1-* ~~ ---- --- 2.9 ______- a 0.7 3.3 Below, for several kinds of digested sludge with different concentrations, as in the above case, centrifugal concentration without adding coagulant, the TVS / TS ratio and discharge of sludge supplied to the centrifugal thickener The relationship between the TVS / TS ratio of the sludge (concentrated sludge and clarified sludge (concentrated separation liquid)) was analyzed, and the results are shown in FIG. 6. It can be clearly seen from Fig. 6 that the TVS / TS ratio of the concentrated sludge is lower than the TVS / TS ratio of the supplied sludge by 0.02 · 0 · 04, and the clarified sludge is about 0.003 higher. From this result, it can be seen that the inorganic components on the concentrated sludge side are preferentially concentrated. In addition, each of the concentrated sludge and the supplied sludge was dehydrated under the same conditions (filtration speed, filter cloth pressure, and coagulant addition rate) using a belt press dehydrator, and the moisture content of the obtained dewatered sludge cake was concentrated. The dewatered sludge cake of the sludge is about 5% lower than the dewatered sludge cake supplied with the sludge. Similarly, the amount of solids is compared. The dehydrated sludge cake of the concentrated sludge is compared with the dewatered sewage sludge supplied. From mud cake, the amount of dewatered sludge cake is reduced by 15-20%. From this result, it can be seen that the inorganic components obtained by centrifugal concentration without the addition of a coagulant are genus 2-the concentrated sludge with a large content has good dehydration properties. Although the present invention has been disclosed in the preferred embodiment as above, it is not intended to limit the present invention. 'Any person skilled in the art can make some modifications and retouching without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection shall be determined by the scope of the attached patent application. [Brief description of the drawings] Fig. 1 is a system diagram showing a practical method of the anaerobic digestion treatment device for an organic waste liquid of the present invention. Fig. 2 is a system diagram showing another embodiment of the anaerobic digestion treatment device for an organic waste liquid of the present invention. Fig. 3 is a graph showing changes over time of sludge concentration and digestion rate in the anaerobic digester of Example 1. Fig. 4 is a graph showing changes over time of sludge concentration and digestion rate in the anaerobic digester of Comparative Example 1. Figs. Fig. 5 is a graph showing changes over time of sludge concentration and digestion rate in the anaerobic digester of Example 2. Fig. 6 is a graph showing the relationship between the TVS / TS ratio of the supplied sludge and the TVS / TS ratio of the discharged sludge (concentrated sludge and clarified sludge (concentrated separation liquid)) obtained in Experimental Example 2. [Description of Symbols of Main Components] 1: Anaerobic digester 2: Concentrator 3: Mixing tank 4: Delivery pump 28 220052 & 5: Ozone treatment device 6: Front aeration tank 7: Centrifugal thickener

Claims (1)

τ, the scope of patent application ... An anaerobic digestion treatment device for organic waste liquid, characterized by an anaerobic digestion tank, for anaerobic digestion of the organic waste liquid; a solubilization device, A digestive digester extracted from the gas digester is subjected to a dissolving treatment; a return device that returns one of the soluble sludge discharged from the dissolving device to the anaerobic digester; a solid-liquid separation A device for concentrating the digested sludge discharged from the anaerobic digester; ▲ a conveying pipe for returning a concentrated sludge discharged from the solid-liquid separation tank to a conveying pump of the anaerobic digester; and ...- The liquid supply device adds a liquid to the sludge sludge on the suction pump or the suction side of the delivery pump. 2. An anaerobic digestion treatment device for organic waste liquid as described in item i of the application for patent, characterized in that the liquid added to the sludge is the solubilized sludge. A. Please search for profits. The anaerobic digestion treatment device for organic waste liquid of Beisuofan is characterized in that the dissolving place includes an oxidation treatment device. For example, the anaerobic digestion treatment device for organic waste liquid as described in item 3 of the patent scope is characterized in that the front section of the oxidation treatment device has aeration of the sludge extracted from the anaerobic tank. The anaerobic digestion treatment device for organic waste liquid described in the item ^ is characterized in that the tired external emulsification location is set to-ozone treatment device 30 200521 account. 6. The anaerobic digestion treatment device for organic waste liquid according to item 1 of the scope of the patent application, characterized in that: a centrifugal concentration device is used for concentrating the digested sludge discharged from the anaerobic digestion tank without adding a coagulant; And a sludge discharge device, at least a part of the concentrated sludge of the centrifugal concentration device is discharged outside the system. 31