CN116854301A

CN116854301A - Wastewater treatment process

Info

Publication number: CN116854301A
Application number: CN202310904490.7A
Authority: CN
Inventors: 刘丹
Original assignee: Suzhou Cps Technology Co ltd
Current assignee: Suzhou Cps Technology Co ltd
Priority date: 2023-07-21
Filing date: 2023-07-21
Publication date: 2023-10-10

Abstract

The application discloses a wastewater treatment process, which comprises the following steps: collecting and homogenizing, and homogenizing the water quality and quantity of the wastewater; anaerobic treatment, namely, enabling the homogenized wastewater to enter an anaerobic tank, and decomposing macromolecular organic matters into micromolecular organic matters in the anaerobic tank; aerobically treating, namely, introducing the waste water subjected to the anaerobic treatment into an aerobic tank to remove organic pollutants in the waste water; MBR membrane filtration, and the mixed solution after aerobic treatment enters an MBR tank for mud-water separation; ozone catalysis, wastewater is pumped into an ozone catalytic oxidation unit through MBR, and organic matters which are difficult to degrade in the wastewater are fully decomposed after catalytic oxidation treatment. According to the application, the waste water is treated by the combination of OA-MBR-ozone catalytic oxidation, so that a carbon sand filtration process is replaced, the commission amount of waste activated carbon can be reduced, secondary pollution is avoided, the environment is friendly, the operation cost is low, and the pollutant removal rate is high.

Description

Wastewater treatment process

Technical Field

The application relates to the technical field of wastewater treatment, in particular to a wastewater treatment process.

Background

The cleaning wastewater generated in the machining process usually contains suspended matters, surface active organic pollutants and the like, and for the wastewater, an air floatation-coagulation sedimentation-sand carbon filtration treatment process is generally adopted at present, the wastewater passes through the sand carbon, most pollutants are trapped on the upper surface of the sand carbon, and fine dirt and other organic matters are trapped inside the sand carbon layer.

After a period of filtration, the sand char needs to be rinsed, even if frequently replaced. The use of a large amount of activated carbon is easy to cause secondary pollution.

Disclosure of Invention

The application provides a wastewater treatment process for solving the problem that sand carbon filtration is easy to cause secondary pollution of a large amount of waste activated carbon.

The application provides a wastewater treatment process, which adopts the following technical scheme: a wastewater treatment process comprises the following steps:

collecting and homogenizing, and homogenizing the water quality and quantity of the wastewater;

anaerobic treatment, namely, enabling the homogenized wastewater to enter an anaerobic tank, and decomposing macromolecular organic matters into micromolecular organic matters in the anaerobic tank;

aerobically treating, namely, introducing the waste water subjected to the anaerobic treatment into an aerobic tank to remove organic pollutants in the waste water;

MBR membrane filtration, and the mixed solution after aerobic treatment enters an MBR tank for mud-water separation;

ozone catalysis, wastewater is pumped into an ozone catalytic oxidation unit through MBR, and organic matters which are difficult to degrade in the wastewater are decomposed after catalytic oxidation treatment.

By adopting the technical scheme, the wastewater is treated by combining anaerobic, aerobic, MBR and ozone catalytic oxidation to replace a carbon sand filtration process, the commission amount of waste activated carbon can be reduced, secondary pollution is avoided, the environment is friendly, the operation cost is low, and the pollutant removal rate is high.

In a specific implementation mode, a mud-water separation tank is arranged between the anaerobic tank and the aerobic tank, a backflow tank is arranged between the mud-water separation tank and the anaerobic tank and between the MBR tank and the aerobic tank, and a backflow component for filtering sludge is arranged in the backflow tank.

Through adopting above-mentioned technical scheme, through setting up the backward flow pond, the mixed liquor after anaerobic reaction gets into mud-water separation pond, makes mud-water separation through natural sedimentation, and sedimentation mud gets into the backward flow pond, in the backward flow subassembly gets back to the anaerobic tank again, and the same reason, the mud in the MBR pond gets into in the good oxygen pond through the backward flow subassembly in the backward flow pond to can improve the utilization ratio of mud.

In a specific implementation manner, the backflow component comprises a filter plate, a bearing plate and an anti-blocking plate, a plurality of filter holes are formed in the filter plate, a plurality of bearing holes are formed in the bearing plate, the filter holes are communicated with the bearing holes, a driving component used for driving the anti-blocking plate to lift is arranged in the backflow tank, a plurality of anti-blocking strips are arranged on the anti-blocking plate and used for penetrating through the filter holes and the bearing holes, a backflow cavity is formed between the bearing plate and the filter plate, a backflow pipe is arranged on the backflow tank, one end of the backflow pipe is communicated with the backflow cavity, and the other end of the backflow pipe is connected with the anaerobic tank or the aerobic tank.

Through adopting above-mentioned technical scheme, the filter can filter substances such as stone in the mud, and on the mud after filtering reached the loading board, finally got into anaerobic tank or good oxygen in the pond, through drive assembly drive anti-blocking plate goes up and down, prevents stifled strip can clear up the filtration pore, avoids the filtration pore to the greatest extent to block up.

In a specific implementation manner, the bearing plate is provided with a sinking platform hole communicated with the bearing hole, the sinking platform hole is rotationally connected with a bearing sheet, and the bearing sheet is used for sealing the bearing hole.

Through adopting above-mentioned technical scheme, seal the loading port through the loading piece, can intercept mud between loading piece and filter plate, make the mud after the filtration flow out from the back flow, flow into in anaerobic tank or the good oxygen pond, realize the reutilization of mud.

In a specific implementation mode, the driving assembly comprises a lifting ratchet bar and a lifting block, a pawl is rotationally connected to the lifting block, a reset rod is mounted on the inner wall of the lifting block, a reset spring is sleeved on the reset rod, a connecting rod is rotationally connected to the pawl, a connecting hole is formed in the connecting rod, the reset rod is slidably mounted in the connecting hole, one end of the reset spring is in contact with the inner wall of the lifting block, the other end of the reset spring is in contact with the connecting rod, a lifting frame is mounted on the lifting block, and the lifting frame is connected with the anti-blocking plate.

Through adopting above-mentioned technical scheme, will prevent stifled board and install on the crane, drive lifting block rises, and the pawl can be with lifting ratchet bar joint, carries out spacingly to the lifting block, prevents that the lifting block from falling, promotes to the top with preventing stifled board, makes prevent that stifled strip from passing the filtration pore, clears up the interior accumulational mud of filtration pore, convenient operation.

In a specific implementation, the crane is U-shaped, the crane comprises a cross rod and a horizontal rod, the horizontal rod is arranged at two ends of the cross rod, a limiting groove is formed in the crane, a limiting block is arranged on the anti-blocking plate, and the limiting block is slidably mounted in the limiting groove.

Through adopting above-mentioned technical scheme, through setting up the spacing groove, be convenient for install anti-blocking plate on the crane, and can restrict the removal of vertical direction between anti-blocking plate and the crane, realize the spacing to anti-blocking plate, be convenient for install and dismantle anti-blocking plate.

In a specific implementation manner, a heating plate is arranged at the bottom of the anti-blocking plate, a rotating assembly is installed on the lifting block, and the lifting frame is installed on the rotating assembly.

Through adopting above-mentioned technical scheme, rotate the crane through rotating the subassembly, make the hot plate be located the top, upwards remove the crane again, make hot plate and loading board contact, the hot plate can be with heat transfer to the loading board, carries out the mummification to the waste mud on the loading board, is convenient for clear up waste mud.

In a specific implementation mode, the heating plate is detachably connected with the lifting frame, a connecting block is arranged on the heating plate, an installation groove for the connecting block to be clamped in is formed in the inner wall of the lifting frame, the installation groove comprises a first connecting portion and a second connecting portion, the first connecting portion is communicated with the second connecting portion, the first connecting portion is vertically arranged, the second connecting portion is arranged on one side, close to the cross rod, of the first connecting portion and horizontally arranged, a clamping block is arranged on the heating plate, and a clamping groove for the clamping block to be clamped in is formed in the cross rod.

Through adopting above-mentioned technical scheme, upwards promote the hot plate earlier, make the connecting block on the hot plate get into in the first connecting portion, the hot plate is promoted to the level again, makes the connecting block on the hot plate get into in the second connecting portion, makes the fixture block card go into in the draw-in groove simultaneously, realizes the location to the hot plate, helps realizing better connection effect.

In a specific embodiment, the rotating assembly comprises a rotating disc, a rotating gear and a knob, wherein the rotating disc is rotatably connected to the lifting block, the rotating gear is coaxially arranged on the rotating disc, and the knob is in transmission connection with the rotating gear.

Through adopting above-mentioned technical scheme, through rotating the knob, the knob drives and rotates the tooth rotation, rotates the tooth and drives the rolling disc rotation, realizes the upset of crane.

In a specific implementation mode, a plurality of baffles are arranged on the filter plate, the baffles are arranged on the filter plate to form a filter cavity, a plurality of filter strips are arranged on the inner wall of the baffle, the cross sections of the filter strips are in inverted V shapes, and the filter strips are distributed at intervals along the length direction of the filter plate.

Through adopting above-mentioned technical scheme, through setting up the filter strip, mud reaches before the filter, earlier with the contact of filter strip, the filter strip is broken to massive silt, and the mud rethread filter after the breakage is filtered, helps realizing better filter effect.

In summary, the present application includes at least one of the following beneficial technical effects:

the AO-MBR-ozone catalytic oxidation combined treatment process has extremely high removal efficiency and stable system, can avoid the use of a large amount of activated carbon, and avoids secondary pollution as much as possible;

the AO-MBR-ozone catalytic oxidation combined treatment process can avoid the use of hydrogen peroxide, is relatively unlimited in application and is low in operation cost;

3. the reflux component can filter settled sludge, supplement sludge in the anaerobic tank and the aerobic tank, and realize the discharge of aged sludge.

Drawings

FIG. 1 is a system flow diagram of an embodiment of the present application.

Fig. 2 is a schematic overall structure of an embodiment of the present application.

FIG. 3 is a cross-sectional view showing the internal structure of the reflow bath in the embodiment of the present application.

Fig. 4 is a schematic structural view of a loading plate and an anti-blocking plate according to an embodiment of the present application.

Fig. 5 is a schematic structural view of a driving assembly according to an embodiment of the present application.

Fig. 6 is a schematic structural diagram of a reflow assembly according to an embodiment of the present application.

Fig. 7 is a schematic view of an exploded structure of a lifting frame, a heating plate and a blocking prevention plate in an embodiment of the present application.

Reference numerals illustrate:

1.a collecting tank; 2. an anaerobic tank; 3. a mud-water separation tank; 4. an aerobic tank; 50. an MBR pool; 5. a reflux pool; 51. a mounting port; 52. installing a door; 6. a reflow assembly; 61. a filter plate; 62. a carrying plate; 63. a blocking prevention plate; 64. a filter hole; 65. a baffle; 66. a filter chamber; 67. a filter strip; 69. a reflow chamber; 71. a bearing hole; 72. sinking platform holes; 73. a carrier sheet; 8. a drive assembly; 81. lifting the ratchet bar; 82. a lifting block; 83. a pawl; 84. a reset lever; 85. a connecting rod; 86. a connection hole; 87. a return spring; 88. a reset groove; 89. a reset lever; 90. a chute; 9. a rotating assembly; 91. a rotating disc; 92. rotating the gear; 93. a knob; 94. a transmission gear; 95. a lifting frame; 951. a cross bar; 952. a horizontal bar; 97. a limit groove; 98. a limiting block; 99. an anti-blocking strip; 10. a heating plate; 11. a clamping block; 12. a mounting groove; 121. a first connection portion; 122. a second connecting portion; 13. a clamping groove; 14. a connecting block; 15. and a descending rod.

Detailed Description

The present application will be described in further detail with reference to the accompanying drawings.

The embodiment of the application discloses a wastewater treatment process, referring to fig. 1, the wastewater treatment process comprises the following steps:

in order to avoid the impact of the wastewater, the wastewater generated in the machining process firstly enters a collecting tank 1, and the collecting tank 1 homogenizes and homogenizes the water quality and the water quantity of the wastewater in advance;

anaerobic treatment, namely enabling the homogenized wastewater to enter an anaerobic tank 2, decomposing macromolecular organic matters in the wastewater into micromolecular organic matters under the adsorption and degradation actions of anaerobic microorganisms, improving the biochemical property of water quality, wherein the removal sharing rate of the anaerobic tank 2 is 40%, the HRT is 30h, and the CODcr load is 0.8kg CODcr/m3/day;

the mixed liquid after the anaerobic reaction enters a mud-water separation tank 3, mud-water separation is realized through natural sedimentation, the settled sludge flows back to the anaerobic tank 2 as supplement, and aged sludge is discharged periodically;

aerobic treatment, namely, the waste water after anaerobic treatment enters an aerobic tank 4, organic pollutants in the waste water are removed under the actions of coagulation, adsorption, oxidation, decomposition and the like of aerobic activated sludge, CODcr is reduced, the removal sharing rate of the aerobic tank is 95%, the HRT is 30h, and the BODcr load is 0.1kg BOD5/kg MLSS/day;

the MBR membrane is filtered, the mixed liquor after aerobic treatment enters an MBR tank 50 for precise filtration, the effluent is clear, the content of suspended matters is low, most of organic matters are degraded, sludge flows back into an aerobic tank 4 to supplement sludge, and aged sludge is discharged periodically;

ozone is catalyzed, wastewater is pumped into an ozone catalytic oxidation unit through an MBR, the wastewater enters a catalytic oxidation reaction tower, mixed gas and liquid which is dissolved and uniformly dispersed are uniformly dispersed everywhere at the bottom of the reaction tower, organic matters in the wastewater are adsorbed by a catalyst and are enriched on the surface, ozone is decomposed into OH under the action of the catalyst, and most of organic matters which are difficult to degrade are subjected to reactions such as chain scission, ring opening, oxidation and the like under the strong oxidation capability of OH, and finally oxidized into micromolecular organic matters, CO2 and H20. The inflow CODcr is designed to be 200mg/L, the removal of 50% is designed to be shared, the HRT of the CO ozone reaction tower is 2h, and the ozone inflow concentration is 200mg/L.

Compared with the sand-carbon filtration process, the AO (anaerobic-aerobic process) -MBR-ozone catalytic oxidation combined treatment system has high removal rate, can effectively remove organic pollutants which are difficult to degrade in the machining wastewater, ensures that the effluent quality is better than the designed effluent quality for a long time, and is as low as 80mg/L of CODcr, and the overall removal rate is as high as 92-97%. Meanwhile, the use of a large amount of activated carbon can be avoided, so that secondary pollution is avoided, and the environment is friendly. Compared with Fenton technology, the AO-MBR-ozone catalytic oxidation combined treatment system basically does not need to add a medicament, avoids the use of hydrogen peroxide, is relatively unlimited in application, and has low overall operation cost.

Referring to fig. 2 and 3, in the sludge recirculation process, since the sludge is doped with garbage or lump sludge, clogging is easily caused in the recirculation process, and cleaning of the garbage and lump sludge in the sludge is inconvenient. For this purpose, a reflux tank 5 is provided between the sludge-water separation tank 3 and the anaerobic tank 2, and between the MBR tank 50 and the aerobic tank 4, and a reflux module 6 for filtering sludge is provided in the reflux tank 5.

Referring to fig. 2 and 3, the reflow assembly 6 includes a filter plate 61, the filter plate 61 is fixed on the inner wall of the reflow tank 5, a plurality of filter holes 64 are formed in the filter plate 61, four baffles 65 are fixed on the filter plate 61, and the baffles 65 enclose a filter cavity 66 on the filter plate 61. The top of baffle 65 is fixed with filter strip 67, and the cross-section of filter strip 67 is the reverse V type, and filter strip 67 is equipped with a plurality of, and filter strip 67 is arranged along the length direction interval of filter 61. After the sludge enters the reflux tank 5, the sludge is firstly contacted with the filter strip 67, the section of the filter strip 67 is in an inverted V shape, the filter strip 67 can collide with blocky sludge to crush the blocky sludge, the crushed small sludge falls onto the filter plate 61, the filter plate 61 filters the small sludge again, garbage in the sludge is separated from the sludge, and the sludge flows out from the filter holes 64.

Referring to fig. 2 and 3, a carrying plate 62 is arranged at the bottom of the filter plate 61, a backflow cavity 69 is formed between the carrying plate 62 and the filter plate 61, a backflow pipe (not shown in the drawings) is fixed on the backflow tank 5, one end of the backflow pipe is communicated with the anaerobic tank 2, and the other end of the backflow pipe is communicated with the backflow cavity 69. The filtered sludge reaches the bearing plate 62 and flows into the anaerobic tank 2 from the return pipe to be supplemented.

Referring to fig. 3 and 4, a plurality of bearing holes 71 are formed in the bearing plate 62, the bearing holes 71 are communicated with the filtering holes 64, a counter hole 72 is formed in the top wall of the bearing plate 62, and the counter hole 72 is coaxially arranged with the bearing holes 71. A bearing piece 73 is hinged in the counter sink hole 72, and the bearing piece 73 is used for closing the bearing hole 71.

Referring to fig. 4 and 5, a driving assembly 8 is installed in the reflow bath 5, the driving assembly 8 comprises two lifting ratchets 81 and a plurality of lifting blocks 82, the lifting ratchets 81 are vertically arranged on two sides of the length direction of the reflow bath 5, and the lifting blocks 82 are slidably sleeved on the lifting ratchets 81. A pawl 83 is hinged on the inner wall of the lifting block 82, and the pawl 83 can be clamped in the lifting ratchet bar 81. The inner wall of the lifting block 82 is hinged with a reset rod 84, the pawl 83 is hinged with a connecting rod 85, a connecting hole 86 is formed in the connecting rod 85, the reset rod 84 is slidably mounted in the connecting rod 85, a reset spring 87 is sleeved on the reset rod 84, one end of the reset spring 87 is in contact with the reset rod 84, and the other end of the reset spring 87 is in contact with the connecting rod 85. The lifting block 82 is moved upwards, and the lifting ratchet bar 81 pushes the bottom end of the pawl 83 to the side far away from the lifting ratchet bar 81, so that the lifting block 82 can be driven to lift on the lifting ratchet bar 81. After the lifting block 82 is loosened, the pawl 83 is reset under the action of the reset spring 87, the pawl 83 is clamped with the lifting ratchet bar 81, the lifting block 82 can be limited, and the lifting block 82 is prevented from sliding up and down on the lifting ratchet bar 81.

Referring to fig. 4 and 5, the bottom of the pawl 83 is fixed with a descent lever 15, the descent lever 15 passes through a lifting block 82, a reset groove 88 for sliding the descent lever 15 is formed in the lifting block 82, a sliding groove 90 is vertically formed in the lifting ratchet 81, and the descent lever 15 can slide in the sliding groove 90. When the lifting block 82 is required to descend, the lifting block 82 is manually lifted, and the descending rod 15 is pushed inwards, so that the bottom end of the pawl 83 deflects to the side of the return spring 87, and the lifting block 82 is conveniently descended.

Referring to fig. 4 and 6, a rotating assembly 9 is mounted on each lifting block 82, and the carrier plate 62 is also mounted on the rotating assembly 9 so that the carrier plate 62 can be lifted up and down along the driving assembly 8 and turned over in the reflow bath 5. The rotating assembly 9 comprises a rotating disc 91, a rotating gear 92 and a knob 93, wherein the rotating disc 91 is rotationally connected to the lifting block 82, the rotating gear 92 is coaxially fixed on the rotating disc 91, the lifting block 82 is further provided with a transmission gear 94, the transmission gear 94 is meshed with the rotating gear 92, the knob 93 is rotationally connected to the lifting block 82, and the knob 93 is meshed with the transmission gear 94. Referring to fig. 7, a lifter 95 is mounted on the rotating disc 91, the lifter 95 includes a cross bar 951 and two horizontal bars 952, the horizontal bars 952 are fixed at two ends of the cross bar 951, and the lifter 95 is U-shaped. The lifting frame 95 is provided with the anti-blocking plate 63, the top wall of the horizontal rod 952 is provided with a limit groove 97 along the length direction of the horizontal rod 952, the bottom wall of the anti-blocking plate 63 is fixedly provided with a limit block 98, the limit block 98 is slidably arranged in the limit groove 97, the limit block 98 is specifically a dovetail block, the limit groove 97 is specifically a dovetail groove, and the anti-blocking plate 63 and the lifting frame 95 can be limited to move relatively in the vertical direction through the cooperation of the dovetail groove and the dovetail block. Referring to fig. 3, a mounting opening 51 is formed in a side wall of the bottom of the reflow bath 5, and a mounting door 52 is hinged to the reflow bath 5 at the mounting opening 51, so that the mounting and removal of the blocking preventing plate 63 is facilitated by opening and closing the mounting door 52. A plurality of anti-blocking strips 99 are fixed on the top wall of the anti-blocking plate 63, and the anti-blocking strips 99 can pass through the filtering holes 64 and the bearing holes 71. When the filter holes 64 are blocked, the lifting block 82 is moved upwards, the lifting block 82 drives the anti-blocking plate 63 to lift, the anti-blocking strips 99 on the anti-blocking plate 63 pass through the bearing holes 71 and push the bearing pieces 73 upwards and then pass through the filter holes 64, and sludge in the filter holes 64 is cleaned, so that the blocking of the filter plates 61 can be avoided as much as possible.

When the aged sludge is required to be discharged, additional equipment is required to dry the aged sludge, the water content of the sludge is reduced, and the dried sludge can be used as fuel for secondary use.

Referring to fig. 7, for this purpose, the heating plate 10 is installed on the lifting frame 95 at the bottom of the anti-blocking plate 63, so that the backflow of sludge and the drying of aged sludge can be realized in one backflow tank 5, which is helpful for improving the working efficiency, improving the utilization rate of equipment and reducing the space occupied by the equipment. The connecting block 14 is fixed on the side wall of the heating plate 10, and the mounting groove 12 for the connecting block 14 to be clamped in is formed on the inner side wall of the horizontal rod 952. The cross bar 951 is provided with a clamping groove 13, and a clamping block 11 is fixed on one surface of the heating plate 10 facing the cross bar 951, wherein the clamping block 11 can be clamped into the clamping groove 13. The mounting groove 12 comprises a first connecting portion 121 and a second connecting portion 122, the first connecting portion 121 and the second connecting portion 122 are communicated, the first connecting portion 121 is arranged vertically, the second connecting portion 122 is arranged horizontally, and the second connecting portion 122 is arranged on one side, facing the clamping groove 13, of the first connecting portion 121. When the heating plate 10 is installed, the heating plate 10 is pushed upwards to clamp the clamping block 11 into the first connecting part 121, and then the heating plate 10 is pushed to the clamping groove 13 side to clamp the clamping block 11 into the second connecting part 122, so that the installation of the heating plate 10 is realized.

Through rotating crane 95, make hot plate 10 be located the top, upwards promote crane 95 again, make hot plate 10 and loading board 62 contact, hot plate 10 will heat transfer to loading board 62, dry the mud on the loading board 62, remove loading board 62 to the installing port 51 department again, open installing door 52, take out loading board 62 from in the reflow bath 5, clear up the mud on the loading board 62. Or the bearing plate 62 is rotated to incline the bearing plate 62, so that the sludge on the bearing plate 62 is manually cleaned, and the operation is convenient.

The implementation principle of the embodiment of the application is as follows: waste water generated by machining firstly enters a collecting tank 1, the collecting tank 1 homogenizes and homogenizes the waste water, the waste water enters an anaerobic tank 2, and anaerobic microorganisms in the anaerobic tank 2 decompose macromolecular organic matters in the waste water into micromolecular organic matters, so that the water quality biochemistry is improved. The mixed liquid after anaerobic reaction enters a mud-water separation tank 3, and mud-water separation is realized under the action of natural sedimentation. The settled sludge enters the reflux tank 5, the massive sludge is crushed under the impact action of the filtering strips 67, the massive filter plates 61 filter garbage in the sludge, and the filtered sludge enters the anaerobic tank 2 from the reflux pipe to be used as supplement. When the filter plate 61 is clogged, the lifter 95 is moved upward to pass the blocking preventing strip 99 through the filter hole 64, and the filter hole 64 is cleaned. When the sludge which is partially aged needs to be treated, the lifting frame 95 is turned over, so that the heating plate 10 on the lifting frame 95 is in contact with the bearing plate 62, the sludge on the bearing plate 62 is heated, the sludge is dried, the bearing plate 62 is taken out from the reflux tank 5, and the dried sludge is cleaned.

The wastewater after anaerobic treatment enters an aerobic tank 4, and most of organic pollutants in the wastewater are removed under the action of aerobic activated sludge. The wastewater enters the MBR tank 50 for mud-water separation, and the wastewater enters the MBR tank 50 and the reflux tank 5 at one side in the aerobic tank 4 and then flows back to the aerobic tank 4. An ozone catalytic process is added at the rear end of the MBR tank 50 to catalyze and oxidize most of refractory organic matters in the wastewater, and finally, the organic matters are decomposed.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims

1. The wastewater treatment process is characterized by comprising the following steps of:

anaerobic treatment, namely, enabling the homogenized wastewater to enter an anaerobic tank (2), and decomposing macromolecular organic matters into micromolecular organic matters in the anaerobic tank (2);

aerobically treating, namely, introducing the waste water subjected to the anaerobic treatment into an aerobically pond (4) to remove organic pollutants in the waste water;

MBR membrane filtration, and the mixed solution after aerobic treatment enters an MBR tank (50) for mud-water separation;

2. The wastewater treatment process according to claim 1, wherein: the sludge-water separation device is characterized in that a sludge-water separation tank (3) is arranged between the anaerobic tank (2) and the aerobic tank (4), a backflow tank (5) is arranged between the sludge-water separation tank (3) and the anaerobic tank (2) and between the MBR tank (50) and the aerobic tank (4), and a backflow component (6) for filtering sludge is arranged in the backflow tank (5).

3. The wastewater treatment process according to claim 2, wherein: the utility model provides a backflow subassembly (6) is including filter (61), loading board (62) and anti-blocking plate (63), a plurality of filtration pore (64) have been seted up on filter (61), a plurality of loading hole (71) have been seted up on loading board (62), filtration pore (64) with loading hole (71) intercommunication, be equipped with in backflow pond (5) and be used for driving drive subassembly (8) that anti-blocking plate (63) goes up and down, be equipped with a plurality of anti-blocking strip (99) on anti-blocking plate (63), anti-blocking strip (99) are used for passing filtration pore (64) with loading hole (71), loading board (62) with form backflow chamber (69) between filter (61), be equipped with back flow (70) on backflow pond (5), back flow (70) one end with backflow chamber (69) intercommunication, the other end with anaerobic pond (2) or aerobic tank (4) link to each other.

4. A wastewater treatment process according to claim 3, characterized in that: the bearing plate (62) is provided with a sinking table hole (72) communicated with the bearing hole (71), the sinking table hole (72) is rotationally connected with a bearing sheet (73), and the bearing sheet (73) is used for sealing the bearing hole (71).

5. A wastewater treatment process according to claim 3, characterized in that: the driving assembly (8) comprises a lifting ratchet bar (81) and a lifting block (82), a pawl (83) is rotationally connected to the lifting block (82), a reset rod (84) is mounted on the inner wall of the lifting block (82), a reset spring (87) is sleeved on the reset rod (84), a connecting rod (85) is rotationally connected to the pawl (83), a connecting hole (86) is formed in the connecting rod (85), the reset rod (84) is slidably mounted in the connecting hole (86), one end of the reset spring (87) is in contact with the inner wall of the lifting block (82), the other end of the reset spring is in contact with the connecting rod (85), a lifting frame (95) is mounted on the lifting block (82), and the lifting frame (95) is connected with the anti-blocking plate (63).

6. The wastewater treatment process according to claim 5, wherein: the lifting frame (95) is U-shaped, the lifting frame (95) comprises a cross rod (951) and a horizontal rod (952), the horizontal rod (952) is arranged at two ends of the cross rod (951), a limiting groove (97) is formed in the lifting frame (95), a limiting block (98) is arranged on the anti-blocking plate (63), and the limiting block (98) is slidably mounted in the limiting groove (97).

7. The wastewater treatment process according to claim 6, wherein: the bottom of anti-blocking plate (63) is equipped with hot plate (10), install rotating assembly (9) on elevating block (82), crane (95) are installed on rotating assembly (9).

8. The wastewater treatment process according to claim 7, wherein: the utility model provides a hot plate, hot plate (10) with crane (95) can dismantle and be connected, be equipped with connecting block (14) on hot plate (10), set up mounting groove (12) that are used for supplying connecting block (14) card to go into on the inner wall of crane (95), mounting groove (12) include first connecting portion (121) and second connecting portion (122), first connecting portion (121) with second connecting portion (122) are linked together, first connecting portion (121) vertical setting, second connecting portion (122) set up first connecting portion (121) are close to one side of horizontal pole (951), and the level sets up, be equipped with fixture block (11) on hot plate (10), set up on horizontal pole (951) and be used for supplying fixture block (11) card draw-in groove (13).

9. The wastewater treatment process according to claim 7, wherein: the rotating assembly (9) comprises a rotating disc (91), a rotating gear (92) and a knob (93), wherein the rotating disc (91) is rotationally connected to the lifting block (82), the rotating gear (92) is coaxially arranged on the rotating disc (91), and the knob (93) is in transmission connection with the rotating gear (92).

10. A wastewater treatment process according to claim 3, characterized in that: be equipped with a plurality of baffles (65) on filter (61), baffle (65) are in enclose synthetic filter chamber (66) on filter (61), install a plurality of filter strips (67) on the inner wall of baffle (65), the cross-section of filter strip (67) is the type of falling V, filter strip (67) are followed the length direction interval arrangement of filter (61).