JP2007136367A - Biological wastewater treatment apparatus and biological wastewater treatment method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stably form and maintain particulate microorganism sludge in biological treatment of continuously flowing-in wastewater. <P>SOLUTION: Wastewater is intermittently introduced into an SBAR type forming apparatus 4 to surely form particulate microorganism sludge, and the formed particulate microorganism sludge is mixed with continuously flowing-in wastewater and aerobically treated in a reactor 2. Thus, organic matter, nitrogen and phosphorus, the contaminants in the wastewater, are effectively treated and the microorganism sludge is further granulated. The particulate microorganism sludge is separated from the aerobically treated mixed water in a separator 3, the separated particulate microorganism sludge is returned to mix with wastewater to prevent flowing-out of the particulate microorganism sludge. Such a serial operation is repeated to enlarge the sizes of the particulate microorganism sludge. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a biological wastewater treatment apparatus and a biological wastewater treatment method for biologically treating wastewater using microbial sludge.

  The activated sludge method is widely known and widely used as a biological wastewater treatment method. In this activated sludge method, there are problems such as instability of processing due to load fluctuations and insufficient capacity of the reaction tank that occurs when the existing processing equipment is changed to advanced processing. In urban areas where there are restrictions on the site, there is a problem that even if it is desired to increase the existing processing capacity, it cannot be added.

  On the other hand, there are attempts to use useful microorganisms in the form of granules (granules) for wastewater treatment. In this method, since the microorganism concentration per volume of the reaction tank can be increased by the granular microbial sludge, it can be expected to reduce the reaction tank volume. However, although the method using the granular microbial sludge has been put into practical use as an anaerobic treatment method, there are many problems as an aerobic treatment method, and it has not yet been put into practical use. The main problem is that granular microbial sludge cannot be stably generated and maintained in an aerobic environment.

Here, in recent research, as described in Patent Documents 1 to 3, a technique for stably generating granular microbial sludge even in an aerobic environment is being developed. However, the techniques described in Patent Documents 1 to 3 employ a batch-type (batch-type) processing device called SBAR (Sequencing Batch Airlift Reactor; also called SBR (Sequencing Batch Reactor)). It cannot be applied to a treatment facility where a large amount of wastewater flows continuously. On the other hand, Patent Documents 4 and 5 describe methods of biologically treating continuously flowing waste water using granular aerobic microbial sludge.
WO 2004/024638 A1 WO 98/37027 Special table 2005-517532 Japanese Patent No. 1778681 Japanese Patent No. 2672109

  However, with the techniques described in Patent Documents 4 and 5, it is actually difficult to stably generate and maintain granular aerobic microbial sludge.

  The present invention has been made to solve such problems, and can stably generate and maintain granular microbial sludge when biologically treating continuously flowing waste water. An object of the present invention is to provide a biological wastewater treatment apparatus and a biological wastewater treatment method.

  A biological wastewater treatment apparatus according to the present invention is a biological wastewater treatment apparatus that biologically treats continuously flowing wastewater and continuously discharges the treated water. An SBAR-type generating device for generating microbial sludge of this type, a granular microbial sludge generated by the SBAR-type generating device to continuously flowing waste water, and a reaction device for treating this mixed solution in an aerobic state, It is characterized by comprising a separation device for separating granular microbial sludge from the mixed liquid from the reaction device, and a line for transferring the separated granular microbial sludge so as to be mixed with waste water.

  The biological wastewater treatment method according to the present invention is a biological wastewater treatment method in which wastewater that flows continuously is biologically treated and the treated water is continuously discharged, and is discharged into the SBAR type generator. The particulate microbial sludge produced in the granular microbial sludge production process is mixed with the particulate microbial sludge production process that intermittently introduces and produces granular microbial sludge, and the continuously flowing waste water, and this mixed liquid is mixed A reaction step for treating in an aerobic state, a separation step for separating granular microbial sludge from the mixed solution from the reaction step, and a transfer step for transferring the separated granular microbial sludge so as to be mixed with waste water. It is characterized by that.

  According to such a biological wastewater treatment apparatus and biological wastewater treatment method, wastewater is intermittently introduced into the SBAR-type production apparatus to surely produce particulate microbial sludge, and the produced particulate microorganisms. Sludge is mixed with continuously flowing waste water, this mixed solution is treated in an aerobic state, and organic substances such as pollutants, nitrogen, phosphorus, etc. in the waste water are effectively treated, and microorganisms are treated according to the treatment. The sludge is further granulated, and the particulate microbial sludge is separated from the aerobic-treated mixture, and the separated particulate microbial sludge is returned to be mixed with the wastewater to form the particulate microbial sludge. Outflow is prevented, and a series of such processes is repeated to increase the diameter of the granular microbial sludge. For this reason, granular microbial sludge is stably produced and maintained.

  Here, it is preferable that the SBAR generator is operated so that the batch is continuous. Thereby, granular microbial sludge is continuously generated at regular intervals, and the generated granular microbial sludge is mixed with the waste water continuously or intermittently.

  Moreover, specifically as said line, the line for transferring the granular microorganism sludge isolate | separated with the separation apparatus to a reaction apparatus is mentioned.

  In addition, as the above-mentioned line, specifically, a line for supplying granular microbial sludge separated by a separation device or a crushed material obtained by crushing this granular microbial sludge by a crusher to an SBAR type generation device. The granular microbial sludge separated by this separation device or the crushed material obtained by crushing this granular microbial sludge with a crusher is regarded as the core for promoting the production of granular microbial sludge in the SBAR type production device. In addition, granular microbial sludge can be generated and maintained more stably.

  Moreover, when it has a line for supplying granular anaerobic microbial sludge or crushed material obtained by pulverizing granular anaerobic microbial sludge with a crusher to the SBAR type generation device, this granular anaerobic microbial sludge Or, the crushed material obtained by crushing this granular anaerobic microbial sludge with a crusher is supplied to the SBAR-type generating device and used as the core for promoting the production of granular microbial sludge, and the granular microbial sludge is generated more stably.・ It will be maintained.

  In addition, when a plurality of SBAR type generation devices are provided, simultaneous operation, time difference operation, etc. are possible, increasing the amount of granular microbial sludge generated, and further draining the generated granular microbial sludge more continuously. It is possible to mix, and granular microbial sludge can be generated and maintained more stably.

  Further, when at least one of the SBAR-type generation apparatuses is an SBAR-type growth apparatus that introduces and further grows granular microbial sludge generated by the SBAR-type generation apparatus excluding the SBAR-type generation apparatus, The granulated microbial sludge is further stably generated and maintained.

  Moreover, it is good also as a storage apparatus which introduce | transduces the granular microbial sludge produced | generated with the SBAR type | mold production | generation apparatus except this at least one of the SBAR type | mold production apparatuses, and stores it temporarily.

  Thus, according to the biological wastewater treatment apparatus and biological wastewater treatment method of the present invention, it is possible to stably generate and maintain granular microbial sludge when biologically treating continuously flowing wastewater. Is possible.

  Hereinafter, a preferred embodiment of a biological wastewater treatment apparatus and a biological wastewater treatment method according to the present invention will be described with reference to FIGS. 1 and 2. In the drawings, the same or corresponding elements are denoted by the same reference numerals, and redundant description is omitted. FIG. 1 is a schematic configuration diagram showing a biological wastewater treatment apparatus adopting the biological wastewater treatment method according to the first embodiment of the present invention. The biological wastewater treatment apparatus 100 of the present embodiment includes: Used in wastewater treatment facilities, it treats wastewater that flows continuously while stably generating and maintaining aerobic granules (hereinafter simply referred to as granular microbial sludge).

  As shown in FIG. 1, the biological wastewater treatment apparatus 100 includes an initial settling basin 1, a reaction apparatus 2, and a separation apparatus 3 connected in this order via lines Lb and Lc, and an SBAR type generation apparatus 4 and An SBAR type growth apparatus 5 is also provided, and drainage flows continuously into the first sedimentation basin 1 via a line La.

  The biological wastewater treatment apparatus 100 also includes a pump P1 and a valve V1 that connect the initial sedimentation outlet of the first sedimentation basin 1 and the drainage / particulate microorganism sludge inlet of the SBAR generator 4 as lines connecting the respective apparatuses. Line L1 connected through the line L1, line L2 branched from between the pump P1 of the line L1 and the valve V1 and connected to the drainage / granular microorganism sludge inlet of the SBAR type growth apparatus 5 through the valve V2, the SBAR type generation device 4 is a line L3 for connecting the treated water outlet and the granular microbial sludge inlet of the reactor 2 via a valve V3, the granular microbial sludge outlet of the SBAR type generator 4 and the granular microbial sludge inlet of the SBAR type growth apparatus 5. And a line L4 connecting the valve (three-way valve) V4 via the pump P2, a line L5 connecting the valve V4 and the line L3, and the processing of the SBAR type growth apparatus 5. And a line L7 connecting the water outlet and the line L3 and a particulate microbial sludge outlet and the line L6 line L6, SBAR type growth apparatus 5 connected via the valve V5 via a valve V6.

  Further, the biological wastewater treatment apparatus 100 has a valve L8 branched from this line L8, connecting the particulate microbial sludge outlet of the separator 3 and the granular microbial sludge inlet of the reactor 2 via a pump P3. A line L9 connected to the upstream side of the valve V1 of the line L1 through the valve V7, the crusher 6, the valve V8, and the valve 9, the anaerobic granule tank 7 and the upstream side of the valve V7 of the line L9 are connected to the pump P4 and the valve V10. A line L11 that connects between a line L10 that is connected via the line L9, the confluence of the lines L9 and 10 and the valves V8 and V9 of the line L9 via the valve V11 is disposed. These valves V1 to V11 are for selectively switching the line by opening and closing or adjusting the flow rate, and the pumps P1 to P4 are for driving drainage, sludge and the like to the line by driving.

  The first sedimentation basin 1 is for sedimentation and separation of solid matter from waste water that continuously flows in through the line La.

  Here, the reactor 2 is an aerobic tank, and waste water (primary sediment outlet water; supernatant water) that continuously flows from the first sedimentation tank 1 via the line Lb, and the line L4, valve from the SBAR generator 4 V4, granular microbial sludge introduced via lines L5, L3, granular microbial sludge introduced from SBAR type growth apparatus 5 via lines L7, L6, L3, and separation apparatus 3 via line L8 The granular microbial sludge to be introduced is mixed with aeration and stirring to perform an aerobic treatment.

  The separation device 3 is a final sedimentation basin here, and is for sedimenting and separating particulate microbial sludge from the mixed solution continuously flowing from the reaction device 2 via the line Lc. Since this granular microbial sludge has a faster sedimentation rate than activated sludge, it is possible to reduce the area compared to the final sedimentation basin employed in the activated sludge treatment apparatus.

  The apparatuses 4 and 5 are the same apparatus (SBAR type generation apparatus), one being the SBAR type generation apparatus 4 and the other being the SBAR type growth apparatus 5.

  The SBAR type generation device 4 continuously performs drainage introduction, aeration stirring, sedimentation separation, and treated water outflow to generate granular microbial sludge. Specifically, the SBAR generator 4 introduces a predetermined amount of wastewater into the microbial sludge introduced into the tank through the line L1, forms a cylinder, and stands up at the approximate center in the tank. By supplying air, which is an oxygen-containing gas for aeration, to the lower part of the air lift 4a driven by the blower 4b, the mixed liquid composed of drainage and microbial sludge rises in the air lift 4a and moves outside the air lift 4a. A descending circulating flow is formed, aerated and stirred, and then allowed to stand to settle and separate granular microbial sludge, and the treated water flows out from the middle in the height direction.

  For example, the SBAR-type production apparatus 4 performs a one-cycle operation of introducing a wastewater for 2 minutes, agitating and stirring for 170 minutes, followed by a settling separation for 3 minutes, and a flow of treated water for 3 minutes. This produces granular microbial sludge. The SBAR generator 4 is operated so that the one cycle (batch) is continuous.

  The SBAR-type growth apparatus 5 introduces the granular microbial sludge generated by the SBAR-type generation apparatus 4 via the line L4, and grows the granular microbial sludge by performing the same operation as the SBAR-type generation apparatus 4. Is.

  Next, the operation of the biological wastewater treatment apparatus 100 configured as described above will be described. The wastewater that continuously flows in is the first settling basin of the first settling basin 1 where solids such as sand are settled and separated, and the residue such as vinyl is removed with a screen or the like. The drainage is pumped up from the pump well and continuously flows into the first sedimentation basin 1 via the line La.

  In the first sedimentation basin 1, solids (sludge) are settled and separated, and the solids separated and separated are discharged out of the biological waste water treatment apparatus 100 to be concentrated, dehydrated, incinerated, etc. On the other hand, the waste water from which the solid matter has been separated in the first sedimentation tank 1 (primary sediment outlet water; supernatant water) continuously flows into the reactor 2 via the line Lb.

  Here, the SBAR type apparatuses 4 and 5 will be described. First, the case where the SBAR type generation apparatus 4 is used alone will be described. Part of the waste water from which the solid matter was separated in the first sedimentation basin 1 (primary sediment outlet water; supernatant water) intermittently flows into the SBAR-type generator 4 via the line L1, and the SBAR-type generator 4 The one cycle operation is performed, and particulate microbial sludge is reliably generated.

  And after that, by repeating the operation of one cycle continuously, granular microbial sludge is generated at fixed time intervals, and the generated granular microbial sludge is passed through line L4, valve V4, lines L5 and L3. The reaction apparatus 2 is continuously or intermittently introduced. It is preferable to supply the granular microbial sludge from the SBAR type production device 4 to the reaction device 2 so that the concentration of the reaction device 2 is constant. Moreover, the treated water (supernatant water) of the SBAR type production | generation apparatus 4 is also introduce | transduced into the reaction apparatus 2 via the line L3.

  In the reactor 2, the waste water flowing continuously from the first sedimentation basin 1, the granular microbial sludge from the SBAR type generator 4, and the treated water and the granular microbial sludge from the separator 3 are mixed, and this mixed liquid is preferred. Organic substances (BOD, COD, TOC), nitrogen, phosphorus, etc., which are treated in a tempered state and are pollutants in the wastewater, are effectively treated, and microbial sludge is further granulated according to the treatment.

  The mixed liquid of the reaction apparatus 2 is introduced into the separation apparatus 3 via the line Lc, and the particulate microbial sludge is settled and separated by the separation apparatus 3. At this time, since the granular microbial sludge has a high sedimentation rate, it is easily separated from the treated water (supernatant water). Then, the separated treated water is discharged out of the biological waste water treatment apparatus 100 and sent to a tertiary treatment facility for further treatment, or discharged after being subjected to treatment such as disinfection.

  The granular microbial sludge separated by the separation device 3 is transferred via the line L8, and the excess sludge is discharged out of the biological waste water treatment device 100 and sent to the predetermined sludge treatment facility described above for processing. On the other hand, a predetermined amount of granular microbial sludge is returned through the line L8 so as to be mixed with the waste water that flows continuously from the first settling basin 1. Further, a part of the granular microbial sludge separated by the separation device 3 is introduced into the SBAR-type generation device 4 via the lines L8, L11, L9, and L1 so as to be used for continuous operation for each cycle. It is considered as the core for promoting the generation of microbial sludge. In this way, the particulate microbial sludge is prevented from flowing out from the biological waste water treatment apparatus 100 and circulates in the biological waste water treatment apparatus 100 to increase its diameter. Maintained.

  Thus, in this embodiment, the SBAR type | mold production | generation apparatus 4 which introduce | transduces waste_water | drain intermittently and produces | generates a granular microbial sludge, and the granular microorganism produced | generated by the SBAR type | mold production | generation apparatus 4 in the waste_water | drain which flows in continuously. The reaction apparatus 2 that mixes sludge and treats this mixed solution in an aerobic state, the separation apparatus 3 that separates the granular microbial sludge from the mixed liquid from the reaction apparatus 2, and the separated granular microbial sludge is drained ( Line L8, L11, L9, L1 for transporting to be mixed with wastewater that continuously flows into the reactor 2 and wastewater that intermittently flows into the SBAR generator 4), It is possible to stably produce and maintain granular microbial sludge.

  Further, since the particulate microbial sludge separated by the separation device 3 is introduced into the SBAR type production device 4 and is used as a core for promoting the production, the particulate microbial sludge can be produced and maintained more stably. Has been.

  In addition, when applied to an existing activated sludge treatment apparatus having a first sedimentation basin, a reaction apparatus, and a final sedimentation basin, it is only necessary to add an SBAR type generation apparatus 4 or a line, so that the cost of the equipment is reduced. It is possible.

  Next, the case where the SBAR type growth apparatus 5 is used in combination will be described. In this case, the SBAR generator 4 is used in the same manner as described above, and in addition, a part of the waste water from which the solid matter is first separated in the settling basin 1 is intermittently supplied via the lines L1 and L2. While flowing into the growth apparatus 5, the granular microbial sludge produced | generated by the SBAR type | mold production | generation apparatus 4 is intermittently introduced into the SBAR type growth apparatus 5 via the line L4.

  In the SBAR type growth apparatus 5, the same operation as that of the SBAR type generation apparatus 4 is performed, and the granular microbial sludge introduced from the SBAR type generation apparatus 4 grows and increases in diameter. The granular microbial sludge grown in this SBAR-type growth apparatus 5 is supplied to the reactor 2 via lines L7, L6, and L3, and the treated water (supernatant water) of the SBAR-type growth apparatus 5 passes through the lines L6 and L3. To be supplied to the reactor 2.

  And after that, when granular microbial sludge is introduced from the SBAR type production | generation apparatus 4, granular microbial sludge grows for every fixed time by repeating the operation | movement of the same 1 cycle continuously, and reactor 2 To be supplied. The treated water may be drained after one cycle of operation, and the next cycle of operation may be performed with all or part of the grown granular microbial sludge remaining, thereby further growing the granular microbial sludge. .

  In the reactor 2, the granular microbial sludge from the SBAR type production device 4 or the granular microbial sludge from the SBAR type production device 4 and the growth from the SBAR type growth device 5 are appropriately used as the granular microbial sludge. The granular microbial sludge thus obtained or the grown granular microbial sludge from the SBAR type growth apparatus 5 is introduced and mixed with the waste water flowing in continuously from the sedimentation tank 1 first. It is preferable to supply granular microbial sludge from the SBAR generator 4 or the SBAR growth device 5 to the reactor 2 so that the concentration of the reactor 2 is constant. Thereafter, the same processing as described above is performed. A part of the granular microbial sludge separated by the separation device 3 is introduced into the SBAR type generation device 4 as described above, but may also be introduced into the SBAR type growth device 5 via the line L2. .

  As described above, when the SBAR type growth apparatus 5 is provided, the microbial sludge is further granulated by the SBAR type growth apparatus 5, and the granular microbial sludge can be generated and maintained more stably. The

  Next, a case where the SBAR type growth apparatus 5 on the right side of the figure is used as an SBAR type generation apparatus and a plurality of SBAR type generation apparatuses 4 are provided will be described. In this case, the SBAR generator 4 on the left side of the figure is used in the same manner as described above, and in addition, a part of the waste water from which the solid matter is first separated in the settling basin 1 is intermittently passed through the lines L1 and L2. Are introduced into the SBAR type generation device 5 on the right side of the figure.

  In the SBAR type production | generation apparatus 5, the driving | operation similar to the SBAR type production | generation apparatus 4 is performed, and a granular microbial sludge is produced | generated. The granular microbial sludge produced by the SBAR generator 5 is supplied to the reactor 2 via lines L7, L6, L3, and the treated water (supernatant water) of the SBAR generator 5 is supplied to the lines L6, L3. To be supplied to the reactor 2. It is preferable to supply the granular microbial sludge from the SBAR generation devices 4 and 5 to the reaction device 2 so that the concentration of the reaction device 2 is constant. A part of the granular microbial sludge separated by the separation device 3 is introduced into each SBAR generation device 4, 5.

  Thus, simultaneous operation, time difference operation, and the like are possible when a plurality of SBAR type generation devices 4 and 5 are provided. For this reason, it is possible to increase the production amount of granular microbial sludge, or to supply the produced granular microbial sludge to the reactor 2 more continuously and to mix it with waste water. It can be generated and maintained stably.

  Here, using the lines L8 and L9, a part of the granular microbial sludge separated by the separation device 3 is crushed by the crusher 6, and the crushed material crushed by the crusher 6 is converted into the SBAR type generation device 4. Alternatively, it may be introduced into the SBAR-type growth apparatus (SBAR-type generation apparatus when used as a generation apparatus) 5 as a core for promoting the generation, and granular microbial sludge may be generated and maintained more stably.

  Further, by using the lines L10, L11, and L9, the granular anaerobic microbial sludge from the anaerobic granule tank 7 is used as the SBAR type generation device 4 or the SBAR type growth device (SBAR type generation device when used as a generation device). 5) may be introduced as a core for promoting production, and particulate microbial sludge may be produced and maintained more stably.

  Furthermore, using the lines L10 and L9, the granular anaerobic microbial sludge from the anaerobic granule tank 7 is crushed by the crusher 6, and the crushed material crushed by this crusher 6 is converted into the SBAR type generator 4 or It may be introduced into the SBAR-type growth apparatus (SBAR-type generation apparatus when used as a generation apparatus) 5 as a nucleus for promoting production, and granular microbial sludge may be generated and maintained more stably.

  As described above, the present invention has been specifically described based on the embodiment. However, the present invention is not limited to the above embodiment. For example, in the above embodiment, two SBAR-type generation devices are provided, The SBAR type generation device is the SBAR type growth device 5 that introduces the granular microbial sludge generated by the other SBAR type generation device 4 and further grows. However, the SBAR type generation device is configured to include three or more SBAR type generation devices. At least one of the mold generation apparatuses may be the SBAR type growth apparatus 5 that introduces the granular microbial sludge generated by the SBAR type generation apparatus 4 except this and further grows it. Moreover, it is set as the structure provided with two or more SBAR type | mold production | generation apparatuses 4, and the storage which introduce | transduces and temporarily stores the granular microbial sludge produced | generated by the SBAR type | mold production | generation apparatus except this at least one SBAR type | mold production apparatus It is good also as an apparatus. As described above, the number of SBAR generation devices 4, SBAR growth devices 5, and storage devices is not limited, and at least one SBAR generation device 4 is sufficient.

  Moreover, in the said embodiment, although the final sedimentation basin is used as the separation apparatus 3, it replaces with a final sedimentation basin, and the granular microbial sludge with a fast sedimentation speed and the floating with a slow sedimentation speed by setting a surface area load factor etc. The separation device 3 may be a gravity separation tank (gravity separation device) that separates into treated water containing activated activated sludge, a centrifugal separator, or the like.

  Moreover, in the said embodiment, although the granular microbial sludge isolate | separated with the separation apparatus 3 is supplied to the reaction apparatus 2 and the SBAR type | mold production | generation apparatus 4, it supplies only to the reaction apparatus 2 and an SBAR type | mold production | generation is carried out. The apparatus 4 may be supplied with microbial sludge separately for each cycle. Further, the granular microbial sludge separated by the separation device 3 may be supplied only to the SBAR type generation device 4.

  Also, a mixing device is provided upstream from the reaction device 2, and the mixing device mixes the waste water from the first sedimentation basin 1 and the granular microbial sludge from the SBAR type generation device 4 and the SBAR type growth device 5. May be.

It is a schematic block diagram which shows the biological waste water treatment apparatus which employ | adopted the biological waste water treatment method which concerns on embodiment of this invention.

Explanation of symbols

2 ... reactor, 3 ... separation device (final sedimentation basin), 4 ... SBAR type production device, 5 ... SBAR type growth device (SBAR type production device; storage device), 6 ... crusher, 7 ... anaerobic granule tank, 100 ... biological wastewater treatment equipment,

Claims (9)

A biological wastewater treatment apparatus that biologically treats wastewater that flows continuously and discharges the treated water continuously,
An SBAR-type generator that intermittently introduces drainage to generate granular microbial sludge;
A reactor that mixes the granular microbial sludge produced by the SBAR generator with the continuously flowing waste water, and treats the mixture in an aerobic state;
A separation device for separating particulate microbial sludge from the mixed solution from this reaction device;
A biological wastewater treatment apparatus comprising a line for transferring the separated granular microbial sludge so as to be mixed with the wastewater.   The biological wastewater treatment apparatus according to claim 1, wherein the SBAR-type production apparatus is operated so that batches are continuous.   The biological wastewater treatment apparatus according to claim 1 or 2, wherein the line is a line for transferring granular microbial sludge separated by the separation apparatus to the reaction apparatus.   The line is a line for supplying granular microbial sludge separated by the separation device or a crushed material obtained by crushing the granular microbial sludge by a crusher to the SBAR type generation device. The biological waste water treatment apparatus according to claim 1 or 2.   5. A line for supplying granular anaerobic microbial sludge or a crushed material obtained by pulverizing granular anaerobic microbial sludge with a crusher to the SBAR generator. The biological waste water treatment apparatus according to any one of the above.   The biological wastewater treatment apparatus according to any one of claims 1 to 5, comprising a plurality of the SBAR-type generation apparatuses.   7. The organism according to claim 6, wherein at least one of the SBAR generation devices is an SBAR growth device that introduces granular microbial sludge generated by an SBAR generation device other than the SBAR generation device to further grow the microbial sludge. Wastewater treatment equipment.   7. The organism according to claim 6, wherein at least one of the SBAR-type generation apparatuses is a storage apparatus that introduces and temporarily stores granular microbial sludge generated by an SBAR-type generation apparatus other than the SBAR-type generation apparatus. Wastewater treatment equipment. A biological wastewater treatment method for biologically treating continuously flowing wastewater and continuously discharging the treated water,
A particulate microbial sludge production step of intermittently introducing waste water into the SBAR type production device to produce granular microbial sludge;
A reaction step of mixing the particulate microbial sludge produced in the granular microbial sludge production step with the continuously flowing waste water, and treating the mixed solution in an aerobic state;
A separation step of separating particulate microbial sludge from the mixed solution from this reaction step;
A biological wastewater treatment method comprising: a transporting step of transporting the separated granular microbial sludge so as to be mixed with the wastewater.

Images