JP2005279610A - Method for treating organic sludge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for treating organic sludge which can integrally perform wastewater treatment, sludge treatment and sludge recycle, and can automatically sort and produce finally treated materials by a switching means of the above treatment or the like and its controller in view of a demand for integral automatization, i.e. at the same time of wastewater/sludge treatment, for sorting and producing the finally treated materials of excess sludge, in conventional wastewater or sludge treating method. <P>SOLUTION: The method for treating organic sludge comprises an organic wastewater treating process 1 discharging organic wastewater as the treated water, an organic sludge treating process 10 reducing the volume of the excess sludge of the organic wastewater treating process 1 and returning the excess sludge reduced in volume to the organic wastewater treating process 1, and an organic sludge recycling process 30 making the excess sludge into the finally treated materials, and a switching means 40 for switching the organic wastewater treating process 1 and the organic sludge treating process 10 and/or the organic sludge recycling process 30 is used for the wastewater and sludge treatment. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention contributes to the prevention of environmental pollution, and purifies organic sewage such as human waste, domestic wastewater, municipal sewage, agricultural settlement effluent, livestock wastewater, etc. The present invention relates to an automatic processing method that can be performed.

  Conventionally, the activated sludge method, the biofilm method, etc. are widely adopted as a treatment method for various sewage containing this kind of organic matter. In addition, a method of adding a flocculant to excess sludge and performing agglomeration, dehydration, drying, fermentation, etc., and reducing it to the natural world as a useful final treated product has been widely proposed.

  An organic wastewater is treated without discharging waste, and the fermented sludge is treated as biologically good quality treated water in a closed circulation system (see, for example, Patent Document 1).

There is a method of improving the dewatering efficiency in the dewatering process of generated sludge in a sewage treatment facility or a factory wastewater treatment facility (see, for example, Patent Document 2).
There is a method and apparatus for providing a sludge concentration sensor and a liquid level sensor in a mixing tank to manage the sludge and the flocculant solution in the dehydration process, and automatically adjusting the moisture content of the dewatered sludge (see, for example, Patent Document 3).

There is a method of treating the generated excess sludge in a second biological treatment tank or the like in the next second step when the organic wastewater is purified by biological treatment (see, for example, Patent Document 4).
JP 2000-288572 A (pages 5-6, FIGS. 1-2) Japanese Patent Laid-Open No. 11-19697 (pages 2 and 3, FIG. 1) JP 2002-361299 A (pages 3-4, FIGS. 1-2) JP 2003-80298 A (pages 4-5, FIGS. 2-3)

  In such conventional wastewater to sludge treatment methods, each treatment method has been established, but there is a problem that it is desired to treat in an integrated and integrated manner, that is, wastewater treatment is performed simultaneously with the final treatment of excess sludge. It is required to manufacture separately.

  The present invention solves such a conventional problem, and can comprehensively and comprehensively perform wastewater treatment-sludge treatment-sludge reuse treatment. An object of the present invention is to provide an organic sludge treatment method capable of automatically separating and producing a final treated product by a control device.

  In order to achieve the above object, the organic sludge treatment method of the present invention reduces the amount of excess sludge in the organic wastewater treatment process for discharging organic wastewater as treated water and the organic wastewater treatment process. An organic sludge treatment step for returning to the treatment step, and an organic sludge recycling step for producing the surplus sludge as a final treatment product, the organic wastewater treatment step and the organic sludge treatment step or / and Waste water treatment and sludge treatment are performed through switching means for switching the organic sludge reuse process.

  Provided is an organic sludge treatment method capable of purifying organic wastewater by this means, and at the same time, automatically separating and producing a final treated product and effectively reusing the excess sludge.

  The present invention solves such a conventional problem, and can comprehensively and integrally process the three treatments of organic wastewater treatment-organic sludge treatment-organic sludge reuse treatment, At the same time, it is possible to provide an organic sludge treatment method in which each of these treatments is automatically classified by selecting a use of the final treatment product by the switching means and its control device, and manufactured for each mode.

  According to invention of Claim 1, 2, there can exist the following effects ae.

  a. By switching means, the organic wastewater treatment process and the organic sludge treatment process or / and the organic sludge reuse process can be freely switched, and the organic wastewater is purified and released as treated water. Can be separated and manufactured.

  b. By appropriately having an organic sensor and measuring the sludge concentration in real time, automatic control of each process became possible.

  c. Since all three processes are integrated and integrated, a labor-saving, efficient and space-saving utility can be obtained.

  d. When the purification process of normal organic wastewater is in a high load state, if the timing of the sludge reuse request (manufacturing) from the customer is met, each of the three treatment processes will operate effectively. Processing capacity is further enhanced and demonstrated.

  e. Each of the three steps can at least automate at least three processes: wastewater-sludge treatment only, wastewater-sludge-reuse treatment, and wastewater-reuse treatment. Can be separated and manufactured. That is, a necessary processing step is selected and operated, and optimization can be performed.

  According to invention of Claim 3, 4 and 5, an organic substance sensor is suitably put in the measuring tank of the sedimentation tank of the organic waste water treatment process, the second aeration process of the organic sludge treatment process, and the organic sludge recycling process. In this case, the final processed product can be produced by separating it into a desired organic substance concentration (range).

  According to the inventions described in claims 6, 7, and 8, the control device (control unit) can freely add or change the organic substance concentration (range) of the final processed product, and various kinds of settings can be made by setting the new range. We can respond to your request. In addition, the control device (control unit) is adapted to the characteristics of the organic wastewater that is unique and specific to each site (site), and its rules of thumb are constantly updated, so the accuracy of control is increased and diversified. Correspondence becomes possible.

  According to invention of Claim 9,10,11, the final processed material of predetermined | prescribed organic substance density | concentration can be manufactured by classifying and automating for every mode. Further, the final processed product can be manufactured by being separated and automated for each predetermined concentration range.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is an overall schematic diagram of each process for explaining an embodiment of the present invention in a simplified manner.

  In FIG. 1, reference numeral 1 denotes an organic wastewater treatment process, in which organic wastewater (raw water) 2 containing organic substances is taken in (→ mark, the same applies hereinafter) and purified, and discharged as final treated water 3 to the outside.

  In this case, when the pollution degree (sludge amount, organic substance concentration, etc.) of the organic waste water 2 is low, it can be discharged as the treated water 3 without going through the sludge reduction process described below.

  On the other hand, when the pollution degree of the organic waste water 2 is high, the excess sludge 11 (detailed explanation will be described later) in the organic waste water treatment step 1 passes through the switching means 40, and a part thereof is the next organic matter. The membrane permeate 18 that has been sent to the sludge treatment step 10 and reduced in sludge (reduced excess sludge) is returned to the organic wastewater treatment step 1 and circulated again, and a predetermined purification treatment (digestion decomposition treatment of organic matter) is performed. Done.

  The above is a method for treating ordinary organic wastewater to surplus sludge, which is an activated sludge method or a biofilm method.

  When the pollution degree of the organic waste water 2 is excessive, a part of the excess sludge 11 is discharged to the outside or sent to the organic sludge recycling step 30 described below.

  On the other hand, the other part of the excess sludge 11 (the organic wastewater treatment process 1 or / and the excess sludge 11 from the organic sludge treatment process 10) is sent to the organic sludge recycling process 30 via the switching means 40, and is given a predetermined final value. The processed product 34 is manufactured by automation and sorting by the control device 60 (details will be described later).

  FIG. 2 is an overall schematic diagram illustrating the details of each step in FIG.

  In FIG. 2, the organic wastewater treatment process 1 is mainly composed of a first aeration process 5 and a settling tank 6. First, aeration (aerobic biological treatment) is performed by the aeration tube 4 in the first aeration process 5. Yes. This organically treated organic waste water 2 is sent to the next sedimentation tank 6 and is solid-liquid separated into final treated water 3 and sludge (return sludge 7 and surplus sludge 11 described later) by sedimentation. Most of this sludge is returned to the first aeration step 5 as circulating sludge 7 and circulated, and the purification treatment by the organic waste water treatment step 1 is performed.

  47 shows the organic substance sensor A, and measures the organic substance density | concentration in the precipitation tank 6 (it may exist in the 1st aeration process 5 as needed) in real time (it mentions later for details).

  On the other hand, the surplus portion of the return sludge 7 is sent as surplus sludge 11 to the next organic sludge treatment step 10 via the switching means 40 (detailed description will be described later). The switching and the like are performed by, for example, opening / closing of a flow rate / flow valve, a driving device such as a pump, or the like according to a biological treatment load state.

  The organic sludge treatment process 10 is mainly composed of a second aeration process 17, a separation membrane 16, and an incidental sludge re-substrate forming process 15, and the excess sludge 11 is firstly diffused in the second aeration process 17. Aeration (aerobic biological treatment) is performed.

  In the second aeration step 17, since there is a large amount of nitrogen (ammonia nitrogen, etc.) eluted from the reduced excess sludge 11 (mainly protein to amino acid), the nitrification reaction by aeration proceeds, resulting in a decrease in pH (value). It becomes easy to do.

  However, when the nitrification reaction proceeds excessively in the second aeration step 17 and the pH is extremely lowered, the biological treatment in the second aeration step 17 is adversely affected. In such a case, the aeration in the second aeration step 17 is intermittently performed, and the denitrification reaction is advanced when the second aeration step 17 is in an anaerobic state, thereby extremely reducing the pH (value). Can be prevented. In addition, in order to advance a denitrification reaction effectively, it is desirable to install the stirrer 13 which stirs in an anaerobic state.

  A part of the concentrated sludge of the excess sludge 11 in the second aeration step 17 is sent to the accompanying sludge re-substrate forming step 15 depending on the situation, and becomes the re-substrate sludge 14.

  In this way, the excess sludge 11 in the second aeration process 17 is separated into the solid-liquid (membrane) through the separation membrane 16 and returned as the membrane permeated water 18 from which suspended substances have been removed. It is possible to reduce the load of organic matter (to bring about improved water quality of the final treated water 3).

  The above-mentioned sludge re-substrate forming step 15 is a general term for, for example, ultrasonic treatment, ozone treatment, alkali agent treatment, oxidant treatment, high-temperature and high-pressure treatment, etc., and is in a state where microorganisms can be decomposed by adsorption, assimilation, or the like. This is a process for treating sludge.

  For example, when ultrasonic waves (about 10 to 100 kHz) are irradiated to the concentrated sludge, positive to negative pressure is alternately applied to gas molecules present in the excess sludge 11, and the gas molecules compressed at the positive pressure are Instantly expands due to negative pressure. This repetition causes the gas molecules to have a very high pressure, and eventually collapse at that limit (called cavitation). By this cavitation, a high-temperature and high-pressure reaction field is formed, and the excess sludge 11 can be re-substrateed by crushing to obtain the re-substrate sludge 14.

  Also, if oxygen bubbles (air, oxygen, ozone, etc.) are injected just before irradiating ultrasonic waves, the dissolved oxygen in the excess sludge 11 is increased by bringing fine oxygen bubbles into contact with the concentrated sludge. It has the effect of increasing the reaction nucleus of cavitation. Furthermore, fine bubbles can themselves be cavitation reaction nuclei. In addition, when oxygen (injection of aerobic bubbles) enters a high-temperature and high-pressure reaction field generated by cavitation, active species with high oxidizing power are generated, which has an effect of contributing to re-substrateing of the excess sludge 11.

  Reference numeral 48 denotes the organic substance sensor B, which measures the organic substance concentration in the second aeration step 17 in real time.

  Each of these organic matter sensors (A and B described above and C described later) includes a TOC meter (total organic carbon), a BOD meter (biochemical oxygen demand), a COD meter (chemical oxygen demand), an SS meter. (Whole suspended suspended solids) and the like. For the concentration measurement, only the SS meter may be used, but it is obvious that the concentration may be measured in combination with a TOC meter (or BOD meter or COD meter), for example.

  As will be discussed, the excess sludge 11 in the second aeration step 17 is transferred to the separation membrane 16 and further aerated in the separation membrane 16 by the diffuser tube 12. The pH (value) in the separation membrane 16 is The acid range is suitable for removal (the description is omitted).

  The filter used in the separation membrane 16 is not particularly limited, and any of a flat membrane type, a hollow fiber type, a spiral type, and the like may be used.

  Furthermore, the other part of the excess sludge 11 (the organic sludge treatment process 1 or / and the excess sludge 11 from the organic sludge treatment process 10) is appropriately mixed (described later) through the switching means 40, and the following organic It is sent to the sludge recycling process 30.

  The organic sludge reuse process 30 is mainly composed of a dehydration process 31 and a dry fermentation process 33, and the organic sludge is safe for animals and plants and produces a final treated product 34 that does not cause environmental pollution.

  49 shows the organic substance sensor C, and measures the organic substance density | concentration of the excess sludge 11 which was mix | blended and sent to the measurement part 50. FIG. This organic substance concentration has a correlation with the organic substance concentration of the final processed product 34 to be described later, that is, a substitute value for the organic substance concentration of the final processed product 34.

  And the surplus sludge 11 after the measurement part 50 is added with the flocculant 32, and is coagulated and settled. The flocculant 32 used is a microorganism-producing flocculant and chitin / chitosan, or ammonium alginate and chitin / chitosan, etc., which is safe for animals and plants and does not contaminate the natural environment. Digestion with microorganisms at 33 is facilitated.

  In the next dehydration step 31, the excess sludge 11 (condensed sludge) that has been coagulated and precipitated is dehydrated (concentrated) using a filter, a dehydrator, a centrifuge, a press, or the like, and sent to the next dry fermentation step 33.

In the dry fermentation process 33, the drying process is usually first and the fermentation process is later (in some cases, it may be reversed)
become.

  The excess sludge 11 (concentrated sludge) concentrated to a moisture content of 95% or less by the dehydration step 31 and the drying step is input to the fermentation step, and the genus Bacillus, Lactobacillus (bacteria), Saccharomyces genus, Torula (above) , Yeast), Aspergillus genus and Rhizopus genus (hereinafter referred to as filamentous fungi), at a temperature of 40 to 70 with stirring in an aerobic atmosphere in the presence of at least one microorganism group selected from the group consisting of fungi. Maintained at 0 ° C., the amount of discharge is reduced by fermentation digestion treatment to 1/10 or less of the input amount by the residence time of 2 weeks on average, and the final processed product 34 is manufactured.

For example, the fertilizer 35, the soil deodorizing material 36, and the soil improving material 37 are separated and manufactured in the descending order of the organic matter concentration (organic content). Simply put,
(1) Manufacture of the fertilizer 35 is mainly from the sedimentation tank 6 of the organic waste water treatment process 1,
(2) The production of the soil deodorizing material 36 starts from the settling tank 6 and the second aeration step 17,
(3) The soil improvement material 37 is manufactured mainly by sending the surplus sludge 11 from the second aeration step 17 (in some cases, the sludge re-substrate forming step 15 as well).

  The fertilizer 35 should be rich in organic matter (nutrient). The soil deodorizing material 36 is used by mixing (mixing) with other components (nutrients), and although it may be low in nutrients, it is used as a source of inoculum, so a certain amount of organic matter is required. The soil improving material 37 is used by mixing (mixing) with other components (nutrients), and it is better that the soil itself has less nutrients.

  The switching means 40 is composed of, for example, supply means (electric pump A41, electric pump B42, electric pump C43) and opening / closing means (electric valve A44, electric valve B45, electric valve C46), which are collectively referred to. It is a thing.

  The electric pump A41 is for sending the excess sludge 11 from the settling tank 6 to the second aeration step 17 and / or the organic sludge recycling step 30, and the second aeration step 17 is controlled by the electric valve A44. To the activated sludge recycling process 30, the opening and closing of the transmission path (flow path) is performed by the motor-operated valve B45 by the control device 60 (details will be described later).

  The electric pump B42 is for sending the excess sludge 11 from the second aeration step 17 to the organic sludge recycling step 30, and the control device 60 opens and closes the feed path (flow path) by the electric valve C46. Is done.

  The electric pump C43 is for sending the excess sludge 11 from the second aeration step 17 to the sludge re-substrate forming step 15, and is performed by the control device 60.

  FIG. 3 is an overall schematic diagram in which a control device 60 is further added to the overall schematic diagram of FIG. In addition, since it becomes difficult to read, the provision of the overlapping reference numerals in both figures is omitted for a part unnecessary for the description.

  In FIG. 3, reference numeral 60 denotes a control device, to which measurement data of each organic matter concentration is inputted from the organic matter sensor A47, the organic matter sensor B48, and the organic matter sensor C49, and after a predetermined control process (detailed later), the switching means 40 The electric pump A41, the electric pump B42, the electric pump C43, the electric valve A44, the electric valve B45, and the electric valve C46 are output to be controlled.

  The switching means 40 can open and close the feed path (flow path) and change the feed rate (flow volume and flow rate), and therefore can switch the blending ratio of surplus sludge 11 (details will be described later).

  FIG. 4 is a schematic diagram illustrating the contents of the control device 60 in the overall schematic diagram of FIG. 3 in a simplified manner.

  In FIG. 4, the description overlapping with the above is omitted (hereinafter the same). The control device 60 is configured (although not limited to this) mainly by the final product manufacturing mode setting unit 62 and the control unit 61.

  The final processed product manufacturing mode setting unit 62 sets each mode for separately manufacturing the fertilizer 35, the soil deodorizing material 36, and the soil improving material 37 of the final processed product 34.

  In response to the set mode, the control unit 61 inputs measurement data of organic substance concentration by each organic substance sensor (47, 48, 49), and calculates, analyzes, accumulates, learns, sets, compares, outputs, etc. The normal control process is performed and output to predetermined switching means 40 (each supply means 41, 42, 43 and each opening / closing means 44, 45, 46), and the final processed product 34 for each set / selected mode is output. Separated and manufactured.

  Although the details will be described later, this control unit 61 has a lot of data according to the characteristics and characteristics of the organic wastewater (raw water) and sludge peculiar to the field at the time of test operation before actual production (when newly installed). Is calculated in advance, accumulated and set as an empirical rule, and applied to subsequent manufacturing of the final processed product 34. Specifically, each concentration (value) of the organic matter sensor A47 and the organic matter sensor B48 and each compounding ratio are tested, and the control unit 61 shows the correlation with the concentration (value) of the organic matter sensor C49. As a rule, calculate, accumulate, and set.

  That is, the control unit 61 stores in advance the blending (ratio) data of each excess sludge of each organic substance concentration (range) with respect to the organic substance concentration (range) of the final processed product 34 for each manufacturing mode. Based on this empirical rule, the switching means 40 (blending ratio) is controlled so that a predetermined organic substance concentration (range) is obtained. In this case, the organic sludge recycling process 30 is always set to a constant condition, the organic substance concentration (range) of the final processed product 34 in each mode is calculated backward, and the correlation with the organic substance concentration (range) of the measurement unit 50 after blending. Can be set effectively as an alternative to the final processed material 34.

  FIG. 5 is a control flow diagram of the control device 60 that discharges the organic waste water 2 as the treated water 3 in the organic waste water treatment process 1 and the organic sludge treatment process 10 of FIG. 4.

  In FIG. 5, about the organic waste water treatment process 1, the organic sludge treatment process 10, and the sludge re-substrate forming process 15 (all of which is a solid line →), the already known ordinary organic waste water to excess sludge Control and processing method.

  Therefore, the feature of the present embodiment relates to a control method in which the final treated product 34 in the organic sludge recycling process 30 (dotted line → portion, details will be described later with reference to FIG. 6) is separated and divided. That is, simply speaking, each of these steps (1, 10, 15, 30) is integrated and integrated by the control device 60 for automation control.

  That is, in general, with the increase in the organic matter concentration of the organic wastewater 2 (increase in the load of each treatment step 1, 10, 15), the organic wastewater treatment step 1 (return sludge 7 if necessary), Each treatment is performed through the organic sludge treatment step 10 (sludge re-substrate forming step 15 as necessary), but sometimes the excess sludge 11 is released to the outside.

  When a mode for manufacturing the final processed product 34 is set while each of these normal processing steps is performed, the surplus sludge 11 is blended by the control device 60 at that time and the organic sludge recycling step 30 is performed. Are manufactured for each mode selected by separating a predetermined amount.

  FIG. 6 is a control flow diagram of the control device 60 when the final processed product 34 in the organic sludge recycling process 30 of FIGS. 4 and 5 is manufactured by use selection.

  First, in FIGS. 3 to 5, the control of the organic sludge recycling step 30 in FIG. 6 starts from the time when the final processed product 34 (for example, the soil deodorizing material 36) is set in the final processed product manufacturing mode setting unit 62. To do.

  Here, the “soil deodorizing material 36 production mode” is selected for use (FIG. 6 is a common control flow diagram for the other fertilizer 35 and soil improvement material 37 production modes), and is separated and manufactured as follows. Explained.

  Excess sludge 11 from both the settling tank 6 of the organic wastewater treatment 1 and the second aeration process 17 of the organic sludge treatment process 10 is blended in an appropriate ratio with respect to a predetermined range of each organic substance concentration, It is the control method which manufactures the soil deodorizing material 36 of the organic substance density | concentration (range) of.

  The control unit 61 compares and determines whether or not the organic substance concentration measurement data (value) of the organic substance sensor A47 in the settling tank 6 is within a predetermined range (based on an empirical rule) with respect to the soil deodorizing material 36, and further the second aeration It is compared and determined whether or not the organic substance concentration measurement data (value) of the organic substance sensor B48 in step 17 is within a predetermined range (from an empirical rule). However, the 2nd aeration process 17 will pass the incidental sludge re-substrate formation process 15 as needed.

  Therefore, the control unit 61 switches the input organic matter concentration data so that the organic matter concentration measurement data (value) of the organic matter sensor C49 in the measurement unit 50 is within a predetermined range (of the soil deodorizing material 36) based on empirical rules. It outputs to the means 40 and is controlled to a predetermined composition (ratio) (of both excess sludges 11).

  That is, when the organic matter concentration of the excess sludge 11 from the sedimentation tank 6 is high, it is adjusted with a blending ratio (flow rate ratio, flow rate ratio, etc.) that makes the excess excess sludge 11 with a low organic matter concentration in the second aeration step 17 ( Control). Of course, if the sludge re-substrate forming step 15 of the second aeration step 17 is added, a lighter surplus sludge 11 can be obtained, and it is possible to cope with a case where the organic matter concentration of the surplus sludge 11 from the settling tank 6 is higher. On the contrary, when the organic substance density | concentration of the excess sludge 11 from the sedimentation tank 6 is light, it can adjust (control) with the compounding ratio which made the excess sludge 11 of the 2nd aeration process 17 large.

  The manufacture (control) of the above-described soil deodorizing material 36 ends when a predetermined amount (volume, weight, etc.) is reached.

  In addition, when the organic substance concentration measurement data of the organic substance sensor C49 at the start of production or during production deviates from the predetermined range of the soil deodorizing material 36, the production is performed while correcting the blending (ratio) so as to be within the predetermined range.

  However, when this organic substance concentration measurement data deviates excessively from the predetermined range (cannot be controlled), it becomes unsuitable for the soil deodorizing material 36, and therefore other processing (for example, a. Diversion to fertilizer 35 or soil improvement material 37, b Cease production and wait, c. Return or discard). Furthermore, even when the predetermined range is deviated excessively so as not to be diverted to the fertilizer 35 or the soil conditioner 37, other processing is performed.

  Further, the control unit 61 also inputs the data at the time of manufacturing, and the empirical rules are always corrected (learned) and accumulated, so that the control accuracy thereafter can be increased.

  Control of “fertilizer 35 production mode” and “soil improvement material 37 production mode” other than those described above is basically the same as that of the soil deodorizing material 36 described above.

  First, regarding the “fertilizer 35 production mode”, when the organic matter concentration of the surplus sludge 11 from the settling tank 6 is high, the surplus sludge 11 having a light organic matter concentration in the second aeration step 17 can be adjusted by the blending ratio. Of course, if the sludge re-substrate forming step 15 of the second aeration step 17 is added, a lighter surplus sludge 11 can be obtained, and it is possible to cope with a case where the organic matter concentration of the surplus sludge 11 from the settling tank 6 is higher. On the contrary, when the organic substance density | concentration of the excess sludge 11 from the sedimentation tank 6 is light, the excess sludge 11 of the 2nd aeration process 17 cannot be adjusted with a compounding ratio.

  If this organic substance concentration measurement data deviates excessively from the predetermined range, it is not suitable for the fertilizer 35, so it is not suitable for other processing (for example, diversion to soil deodorizing material 36 or soil improvement material 37, stop manufacturing, wait, return or discard Etc.) Furthermore, even if the predetermined range is deviated excessively so that it cannot be diverted to the soil deodorizing material 36 or the soil improving material 37, other processing is performed.

  Next, the “soil improving material 37 production mode” can be adjusted to some extent by the sludge re-substrate forming step 15 when the organic matter concentration of the surplus sludge 11 from the second aeration step 17 is high, but it is even deeper. When can not be adjusted. On the contrary, when the organic substance density | concentration of the excess sludge 11 of the 2nd aeration process 17 is light, the excess sludge 11 from the sedimentation tank 6 can be adjusted with a compounding ratio.

  However, when this organic matter concentration measurement data deviates excessively from the predetermined range, it is not suitable for the soil amendment material 37, so it is not suitable for other processing (for example, diversion to fertilizer 35 or soil deodorization material 36, production is stopped, and returned. And disposal). Furthermore, even when the predetermined range is deviated excessively so that it cannot be diverted to the fertilizer 35 or the soil deodorizing material 36, other processing is performed.

Finally, the control device 60 will be described. In order to perform the above-described controls, various setting units (not shown) are prepared in addition to the final product manufacturing mode setting unit 62 (however, reference numerals are given). (Omitted). For example,
1. "Power / Off" or "Power / On"
2. In case of “Power ON”, “Run” or “Stop”
3. For "Operation", "Automatic" or "Manual"
4). In the case of "automatic", "drainage treatment operation", or "drainage treatment-sludge treatment operation", or "drainage treatment-sludge treatment-sludge recycling operation"
5). In the case of “sludge recycling operation”, “manufacturing fertilizer”, “manufacturing soil deodorizing material”, or “manufacturing soil improving material”
6). For "Manual", "Each supply means off / on", "Each open / close means off / on"
A setting (operation) unit such as can be considered.

  The above-mentioned 5. In the case of “sludge recycling operation”, “fertilizer production” is premised on at least “drainage treatment operation”, and “soil deodorizing material production” is premised on at least “drainage treatment-sludge treatment operation”, and “soil improvement material production” Is premised on at least "sludge treatment operation".

  As described above in 6. In the case of “manual”, each supply means and opening / closing means are individually “turned on / off” (operated) in an emergency, compulsory, or emergency manner. Moreover, you may add another manual valve to each transmission path.

  In addition, it is obvious that remote process management becomes possible by providing an overall state diagram (not shown) that can monitor and confirm each operation to operation status in a separate room or the like, which is more convenient.

  5. In the case of `` sludge recycling operation '', it is added so that an arbitrary organic substance concentration range can be set for each final treated product, or instead of the setting of `` fertilizer manufacturing-soil deodorizing material manufacturing-soil improvement material manufacturing '' Only the organic substance concentration range may be set. In any case, each final processed product can be manufactured (sorted) for each concentration range.

  Although one example of setting the mode of the fertilizer 35, the soil deodorizing material 36, and the soil improving material 37 in the final processed product manufacturing mode setting unit 62 has been described above, it is not necessarily limited thereto. In other words, if the same technical idea is developed, even if the final processed product 34 (organic sludge reuse process 30) other than the three modes is specifically planned and added, it can be expanded and applied on the basis of the present application. If this is the case, it will be easier to handle. In addition to the so-called organic substance concentration (category), other additives, chemicals, etc. are added, or a return circulation process is newly added. It can also be applied to manufacturing.

Overall schematic diagram of each process for simplifying and explaining an embodiment of the present invention Overview diagram explaining in detail the contents of each step in FIG. Overall overview diagram with additional control devices added to the overall overview diagram of FIG. FIG. 3 is a schematic diagram illustrating the contents of the control device in the overall schematic diagram of FIG. 3 in a simplified manner. Flow chart of control of the control device that discharges organic wastewater as treated water in the organic wastewater treatment process and sludge treatment process of FIG. FIG. 4 and FIG. 5 are flow charts for control of the control device in the case of producing the final treated product in the organic sludge recycling process by selecting the application.

Explanation of symbols

1 Organic wastewater treatment process 2 Organic wastewater (raw water)
3 treated water 4 aeration pipe 5 first aeration process 6 sedimentation tank 7 return sludge 10 organic sludge treatment process 11 surplus sludge 12 aeration pipe 13 agitator 14 resubstrate sludge 15 sludge resubstrate process 16 separation membrane 17 second aeration process 18 Membrane Permeated Water 30 Organic Sludge Reuse Process 31 Dehydration Process 32 Coagulant 33 Dry Fermentation Process 34 Final Processed Product 35 Fertilizer 36 Soil Deodorizing Material 37 Soil Improving Material 40 Switching Unit 41 Electric Pump A (Supply Unit)
42 Electric pump B (supply means)
43 Electric pump C (supply means)
44 Electric valve A (opening / closing means)
45 Electric valve B (opening / closing means)
46 Electric valve C (opening / closing means)
47 Organic matter sensor A
48 Organic matter sensor B
49 Organic sensor C
50 Measurement Unit 60 Control Device 61 Control Unit 62 Final Process Manufacturing Mode Setting Unit

Claims (11)

An organic wastewater treatment process for discharging organic wastewater as treated water;
An organic sludge treatment step for reducing excess sludge in the organic wastewater treatment step and returning it to the organic wastewater treatment step;
An organic sludge recycling step for producing the surplus sludge as a final treated product,
An organic sludge treatment method characterized in that wastewater treatment and sludge treatment are performed via a switching means for switching between the organic wastewater treatment step and the organic sludge treatment step or / and the organic sludge reuse step.   Both the organic wastewater treatment process and the organic sludge treatment process have an aeration process, and the aeration process of the organic sludge treatment process is accompanied by a sludge re-substrateing process to perform wastewater treatment and sludge treatment. The organic sludge treatment method according to claim 1, wherein   The organic sludge treatment method according to claim 1, wherein the sedimentation tank used in the organic wastewater treatment step has at least an organic substance sensor to perform wastewater treatment and sludge treatment.   The organic sludge treatment method according to claim 1 or 3, wherein the aeration step of the organic sludge treatment step includes at least an organic substance sensor and performs waste water treatment and sludge treatment.   The organic sludge treatment method according to claim 1, 3 or 4, wherein the measurement unit used in the organic sludge reuse step has at least an organic sensor to perform wastewater treatment and sludge treatment.   The organic sludge treatment method according to any one of claims 3 to 5, wherein the switching unit automatically controls the supply unit and the opening / closing unit by a control device using an organic substance sensor.   The organic sludge treatment method according to any one of claims 1 to 5, wherein the switching means manually operates the supply means and the opening / closing means.   The organic sludge treatment method according to claim 6, wherein the control device can select either automatic control or manual operation of the switching unit.   The organic sludge treatment method according to claim 1 or 2, wherein the final treated product is produced by producing at least a soil conditioner, a soil deodorizing material or a fertilizer from the surplus sludge through the organic sludge recycling step.   The organic sludge treatment method according to claim 1 or 2, wherein the final treated product is produced by the organic sludge recycling step so that the excess sludge is produced for each organic substance concentration range.   In the organic sludge recycling step, the switching means separates the excess sludge from the organic wastewater treatment step or / and the organic sludge treatment step from the soil improvement material, the soil deodorizing material, or the fertilizer by a control device. The organic sludge treatment method according to claim 9, wherein the organic sludge treatment method is manufactured separately.

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