CN111777259B - Integrated small-sized sewage treatment device and treatment method - Google Patents
Integrated small-sized sewage treatment device and treatment method Download PDFInfo
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- CN111777259B CN111777259B CN202010154695.4A CN202010154695A CN111777259B CN 111777259 B CN111777259 B CN 111777259B CN 202010154695 A CN202010154695 A CN 202010154695A CN 111777259 B CN111777259 B CN 111777259B
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- 239000010865 sewage Substances 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 168
- 229910001868 water Inorganic materials 0.000 claims abstract description 168
- 238000005273 aeration Methods 0.000 claims abstract description 65
- 238000006243 chemical reaction Methods 0.000 claims abstract description 55
- 230000007246 mechanism Effects 0.000 claims abstract description 47
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 20
- 239000000945 filler Substances 0.000 claims abstract description 16
- 238000000605 extraction Methods 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 230000001954 sterilising effect Effects 0.000 claims abstract description 5
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 239000010802 sludge Substances 0.000 claims description 28
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 238000005192 partition Methods 0.000 claims description 8
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 7
- 239000000460 chlorine Substances 0.000 claims description 7
- 229910052801 chlorine Inorganic materials 0.000 claims description 7
- 239000011259 mixed solution Substances 0.000 claims description 7
- 238000007689 inspection Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 238000004062 sedimentation Methods 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000004567 concrete Substances 0.000 claims description 2
- 239000011152 fibreglass Substances 0.000 claims description 2
- 238000010992 reflux Methods 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 230000010354 integration Effects 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 10
- 239000010842 industrial wastewater Substances 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 6
- 229910052698 phosphorus Inorganic materials 0.000 description 6
- 239000011574 phosphorus Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 4
- 210000003608 fece Anatomy 0.000 description 4
- 239000010871 livestock manure Substances 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 230000002550 fecal effect Effects 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 208000014451 palmoplantar keratoderma and congenital alopecia 2 Diseases 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/005—Black water originating from toilets
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/043—Treatment of partial or bypass streams
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Biological Wastes In General (AREA)
Abstract
An integrated small sewage treatment device and a treatment method belong to the technical field of sewage treatment. The first area of the reaction barrel septic tank is communicated with a water inlet pipe, an aeration disc in the biological reaction area, which is communicated with an aeration pipe and an electric cabinet, is arranged at the lower end of the filler, a disinfection frame in the clear water area is communicated with a mud/water alternate discharge and air extraction system, a clear water pump is communicated with a water discharge pipe, and the electric cabinet is connected with the aeration pump, the first air extraction mechanism, the aeration pipe and the mud/water alternate discharge and air extraction system. The sewage enters a first septic tank area, a second septic tank area and an adjusting area, a first air stripping mechanism is started, the sewage enters a biological reaction area for treatment, a middle water pipe and a connecting inclined pipe enter a muddy water mixed liquid, a second air stripping mechanism is started, and the sewage flows back to the first septic tank area; and starting a third stripping mechanism, sterilizing, entering a clear water area, and discharging or recycling through a clear water pump. The invention solves the technical requirements of simple maintenance and standard discharge of small-volume sewage, is suitable for small-volume rural sewage treatment and also can be used for treating small-volume industrial wastewater.
Description
Technical Field
The invention relates to an integrated small sewage treatment device and a treatment method, and belongs to the technical field of sewage treatment.
Background
The urban sewage treatment in China mainly adopts a centralized collection treatment mode, and the treatment process mainly adopts a conventional anaerobic-anoxic-aerobic (AAO for short) or circulating activated sludge (CASS for short) process. However, compared with urban sewage, the rural sewage has small water quantity and large daily water quantity change fluctuation, the water quality is also extremely unstable, and the AAO and CASS processes applied to the urban sewage are difficult to adapt to the impact of the water quality and water quantity. And secondly, rural areas are far away, and compared with towns, the rural areas lack professional technicians capable of maintaining and regulating large-scale sewage treatment processes at any time, and facilities caused by untimely maintenance are easy to stop operating due to faults. Compared to towns, rural areas are more difficult to put significant operating and maintenance costs on sewage treatment facilities.
On the other hand, the village is subject to natural conditions and geographical environment problems, and most villages and citizens reside in a scattered form with long household-to-household distances, so that the problem of high investment cost exists in popularization of a centralized treatment mode after collecting pipelines adopted in towns in rural areas. Thus, rural areas are more amenable to the use of small decentralized processing facilities to address the problem of sewage treatment in close proximity to multi-family villagers. If the biological pond of the dispersed sewage treatment device only adopts an aerobic treatment process, the nitrogen and the phosphorus of the effluent can influence the eutrophication of rural water bodies. Considering the affordable capability of construction installation and equipment operation maintenance of village residents, a small-sized sewage treatment equipment with low cost operation and maintenance is needed, and the sewage treatment device needs to meet the requirements of small occupied area and low operation and maintenance cost.
Disclosure of Invention
In order to solve the problems in the background technology, the invention provides an integrated small-sized sewage treatment device and a treatment method.
The invention adopts the following technical scheme: an integrated small sewage treatment device comprises a water inlet pipe, a reaction barrel and an electric cabinet; the reaction barrel is vertically arranged and is divided into a first septic tank area, a second septic tank area, an adjusting area, a biological reaction area and a clear water area through a partition plate, and an inspection opening is formed in the top of the reaction barrel; the first septic tank area is communicated with the second septic tank area and the second septic tank area is communicated with the adjusting area through a flow-through pipe, the adjusting area is communicated with the biological reaction area through a first air stripping mechanism, an aeration pipe, an aeration disc and a filler are arranged in the biological reaction area, the aeration disc is positioned at the lower end of the filler, the lower end of the aeration pipe is communicated with the air inlet end of the aeration disc, the upper end of the aeration pipe is connected with an electric cabinet, and a drain pipe, a disinfection frame, a clean water pump and a mud/water alternate discharge air stripping system are arranged in the clean water area; the disinfection frame is filled with chlorine sheets and is communicated with a mud/water alternate discharge and extraction system, the clean water pump is arranged at the bottom of the clean water zone and is communicated with a water inlet of a drain pipe, a water outlet of the drain pipe extends to the ground, and the electric cabinet comprises a timer, an electromagnetic valve system and an aeration pump; one end of the electromagnetic valve system is connected with the aeration pump, the other end of the electromagnetic valve system is respectively connected with the first gas stripping mechanism, the aeration pipe and the mud/water alternate exhaust gas stripping system, and the electromagnetic valve system is set through a timer.
The invention relates to an integrated small-sized sewage treatment method, which comprises the following steps:
step one: the small domestic sewage is directly communicated with the water inlet pipe through the sewer and enters a first area of the septic tank communicated with the water inlet pipe;
step two: the excrement is deposited in the first septic tank area, and sewage enters the second septic tank area through the corresponding overflow pipe;
step three: after the sewage is further precipitated in the second area of the septic tank, the sewage enters the adjusting area through the corresponding overflow pipe;
step four: temporarily storing the sewage precipitated twice in the second step and the third step in a regulating area, starting an electromagnetic valve system until a timer is started for a preset time, starting a first air stripping mechanism, and lifting the sewage in the regulating area into a biological reaction area;
step five: closing the electromagnetic valve system after the preset time is over;
step six: sewage is treated in an intermittent aeration mode in a biological reaction zone through a preset program;
Step seven: through intermittent aeration in the step six, the middle water pipe and the connecting inclined pipe enter the muddy water mixed solution;
Step eight: after the sedimentation period of the biological reaction zone is finished, a timer starts a solenoid valve III of the solenoid valve system, a second air stripping mechanism is started, and a middle water pipe and residual muddy water mixed liquid in a connecting inclined pipe are extracted and discharged and flow back to the first zone of the septic tank through a sludge pipe;
Step nine: after the preset time, closing a third electromagnetic valve of the electromagnetic valve system, opening a fourth electromagnetic valve, and starting a third stripping mechanism;
Step ten: the sewage is pumped into a disinfection frame at the upper part of the clean water zone through a third stripping mechanism;
Step eleven: the sewage flows through chlorine tablets filled in the disinfection frame, and enters a clear water area for temporary storage after disinfection;
step twelve: the clear water pump starts pumping water along with the gradual rise of the water surface in the clear water area;
Step thirteen: the extracted sewage is discharged or recycled through a drain pipe;
step fourteen: and as the liquid level in the clear water area descends, the clear water pump is automatically turned off when the buoy is lowered to the bottom of the pool.
Compared with the prior art, the invention has the beneficial effects that:
The invention combines the septic tank with the manure water separation function with the sewage treatment biological tank with the denitrification and dephosphorization and organic matter removal functions, the manure water is firstly connected with a reaction barrel driven by an air pump through a water inlet pipe, and the treated effluent is discharged or recycled through a water outlet pipe; the device has the advantages of low overall operation and maintenance cost, small equipment volume and compact structure, has the capability of separating manure from water and removing organic matters, nitrogen and phosphorus in pollutants, has strong capability of resisting water quality and water quantity change, can be produced in a modularized manner, can stably maintain COD (chemical oxygen demand) lower than 50mg/L and ammonia nitrogen lower than 10mg/L, meets the discharge standard of domestic sewage in multiple villages, solves the technical requirements of simple maintenance and standard discharge of small-water-quantity sewage, is suitable for treating the small-water-quantity village sewage, and can also be used for treating small-water-quantity industrial wastewater.
Drawings
FIG. 1 is a plan view of the present invention;
FIG. 2 is a plan view of an inspection port;
FIG. 3 is an expanded cross-sectional view;
Fig. 4 is a schematic diagram of an electric cabinet, a gas stripping mechanism and a mud/water alternate discharge gas stripping system.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present invention are all within the protection scope of the present invention.
The first embodiment is as follows: as shown in fig. 1 to 4, the invention discloses an integrated small sewage treatment device, which comprises a water inlet pipe 1, a reaction barrel and an electric cabinet 24; the reaction barrel is vertically arranged and is of a cylindrical structure, and can also be of a cylindrical structure with a square or oval section, the reaction barrel is sequentially divided into a first septic tank area 2, a second septic tank area 3, a regulating area 4, a biological reaction area 5 and a clear water area 6 (shown in figure 1) around the circle center through a partition board, an inspection opening 33 is arranged at the top of the reaction barrel (as shown in figure 2, each functional unit can be regularly maintained, cleaned and managed through the inspection opening 33 arranged at the top, and deposited solid matters at the bottoms of the first septic tank area and the second septic tank area are sucked); the water inlet pipe 1 is communicated with the first septic tank region 2, the first septic tank region 2 is communicated with the second septic tank region 3 and the second septic tank region 3 is communicated with the regulating region 4 through the overflow pipe 8 (as shown in fig. 3, the overflow pipe 8 is of an inverted L-shaped structure, the overflow pipe 8 is vertically arranged, a horizontal pipe penetrates through a corresponding partition plate to be communicated with an adjacent region, and then the two adjacent regions are communicated), the regulating region 4 is communicated with the biological reaction region 5 through the first air stripping mechanism 9-1, an aeration pipe 10-2, an aeration disc 12 and a filler 13 are arranged in the biological reaction region 5, the aeration disc 12 is positioned at the lower end of the filler 13, the lower end of the aeration pipe 10-2 is communicated with the air inlet end of the aeration disc 12, the upper end of the aeration pipe 10-2 is connected with an electromagnetic valve 22-2 of an electromagnetic valve system of the electric control box 24, and the water outlet pipe 7, a disinfection frame 14, a pump 15 and a mud/water alternate air outlet stripping system are arranged in the region 6; chlorine sheets 16 are filled in the disinfection frame 14 for contact disinfection of the treated clean water; the clean water pump 15 is arranged at the bottom of the clean water zone 6 and is communicated with the water inlet of the drain pipe 7, and the water outlet of the drain pipe 7 extends to the ground for discharging treated water; as shown in fig. 4, the electric control box 24 is arranged on the ground, and the automatic control in the invention is realized by the electric control box 24, which comprises a timer 21, a solenoid valve system and an aeration pump 23; one end of the electromagnetic valve system is connected with the aeration pump 23, the other end of the electromagnetic valve system is respectively connected with the first gas stripping mechanism 9-1, the aeration pipe 10-2 and the mud/water alternate discharge gas stripping system, the electromagnetic valve system is set through the timer 21, and the electromagnetic valve system is controlled by a time program set by the timer 21.
The second embodiment is as follows: as shown in fig. 4, in the first embodiment, the first air stripping mechanism 9-1 includes a first air pipe 10-1 and a riser 11, the first air pipe 10-1 and the riser 11 are vertically disposed, an upper end of the first air pipe 10-1 is connected to the first electromagnetic valve 22-1, a lower end of the first air pipe 10-1 is disposed in communication with a lower end of the riser 11, and an upper end of the riser 11 is disposed in communication with the biological reaction zone 5 through a partition plate between the adjusting zone 4 and the biological reaction zone 5.
And a third specific embodiment: as shown in fig. 4, this embodiment is a further explanation of the first embodiment, and the sludge/water alternate discharge and gas stripping system includes a middle water pipe 17, a connecting inclined pipe 18, a second gas stripping mechanism 9-2 (for sludge discharge), and a third gas stripping mechanism 9-3 (for post-extraction treatment sewage); the upper end of the middle water passing pipe 17 passes through a partition plate between the biological reaction zone 5 and the clear water zone 6 and is communicated with the biological reaction zone 5, the lower end of the middle water passing pipe 17 is communicated with one end of a connecting inclined pipe 18, the other end of the connecting inclined pipe 18 is communicated with a second stripping mechanism 9-2, and the middle part of the connecting inclined pipe 18 is communicated with a third stripping mechanism 9-3. The timer 21 controls the mud/water alternate discharge stripping system to start the second stripping mechanism 9-2 to finish the discharge of the mud-water mixed solution in the pipeline to the first area 2 of the septic tank; and then the third stripping mechanism 9-3 is started, and the sewage treated by the extraction biological reaction zone 5 flows into the clean water zone disinfection frame 14. The mud/water alternate discharge gas extraction system replaces the traditional sedimentation tank, realizes mud-water separation, and saves the tank volume of the integrated treatment device.
The specific embodiment IV is as follows: as shown in fig. 4, this embodiment is further described in the third embodiment, the second air stripping mechanism 9-2 includes a second air pipe 10-3 and a sludge pipe 19, the upper end of the second air pipe 10-3 is connected with the third electromagnetic valve 22-3, the lower end of the second air pipe 10-3 is communicated with the lower end of the sludge pipe 19, the bottom of the sludge pipe 19 is communicated with the other end of the connecting inclined pipe 18, and the upper end of the sludge pipe 19 is communicated with the first septic tank 2 through a partition plate between the first septic tank 2 and the clean water zone 6.
Fifth embodiment: as shown in fig. 4, this embodiment is further described with reference to the third embodiment, the third air stripping mechanism 9-3 includes a third air pipe 10-4 and a clean water pipe 20, the upper end of the third air pipe 10-4 is connected with the fourth electromagnetic valve 22-4, the lower end of the third air pipe 10-4 is communicated with the lower end of the clean water pipe 20, the bottom of the clean water pipe 20 is communicated with the middle of the connecting inclined pipe 18, and the upper end of the clean water pipe 20 is communicated with the sterilizing frame 14.
Specific embodiment six: this embodiment is further described in the first embodiment, the clean water pump 15 is provided with a float, and the on/off of the clean water is controlled by the floating state of the float.
Seventh embodiment: this embodiment is further described with respect to the sixth embodiment, and the material of the reaction tank is steel, plastic or concrete.
Eighth embodiment: this embodiment is further described in the seventh embodiment, where the plastic is glass fiber reinforced plastic or PP material (polypropylene) or PVC material.
Detailed description nine: this embodiment is further described with respect to the sixth embodiment, and the inclination angle of the connecting chute 18 is 15 ° to 30 °.
Detailed description ten: in this embodiment, further description is made of the first embodiment, the filler 13 occupies 3/4 of the volume of the biological reaction zone 5, and is located 20-25 cm below the designed water level.
Eleventh embodiment: this embodiment is further described in the tenth embodiment, and the filler 13 is a spherical porous suspension filler or a suspension type fixed filler.
Twelve specific embodiments: an integrated small-sized sewage treatment method implemented by the device according to any one of the embodiments one to eleven, comprising the steps of:
Step one: the small domestic sewage can be directly communicated with the water inlet pipe 1 through a sewer from a bathroom, a kitchen and the like, and enters the septic tank first area 2 communicated with the water inlet pipe 1;
step two: the fecal is precipitated in the first septic tank zone 2 in the first step (the fecal water is placed in the first septic tank zone 2 to separate solid particles from liquid, wherein large particles such as the fecal are precipitated at the bottom, and the upper part is supernatant without large particles), and sewage (supernatant) enters the second septic tank zone 3 through the corresponding overflow pipe 8;
Step three: the sewage is further precipitated in the second area 3 of the septic tank (small solid particles and liquid are further subjected to solid-liquid separation, the small solid particles are precipitated at the bottom of the tank), and then enters the regulating area 4 through the corresponding overflow pipe 8;
step four: the sewage precipitated twice in the second step and the third step is temporarily stored in the regulating area 4, the electromagnetic valve system (the electromagnetic valve I22-1) is started until the timer 21 is started for a preset time, the first air stripping mechanism 9-1 is started, and the sewage in the regulating area 4 is lifted into the biological reaction area 5;
Step five: closing the solenoid valve system (solenoid valve one 22-1) after the preset time is over;
Step six: in the biological reaction zone 5, the second electromagnetic valve 22-2 is started through a preset program to treat sewage in an intermittent aeration mode;
step seven: through intermittent aeration in the step six, the middle water pipe 17 and the connecting inclined pipe 18 which are communicated with the biological reaction zone 5 enter a muddy water mixed solution;
Step eight: closing the second electromagnetic valve 22-2 to precipitate the biological reaction zone 5, starting the third electromagnetic valve 22-3 of the electromagnetic valve system by the timer 21 after the precipitation period is finished, starting the second air stripping mechanism 9-2, extracting and discharging the residual muddy water mixed solution in the middle water pipe 17 and the connecting inclined pipe 18, and refluxing the muddy water mixed solution into the first septic tank zone 2 through the sludge pipe 19;
Step nine: after a preset time, closing a third electromagnetic valve 22-3 of the electromagnetic valve system, opening a fourth electromagnetic valve 22-4, and starting a third stripping mechanism 9-3;
Step ten: pumping the treated and precipitated sewage into a disinfection frame 14 at the upper part of the clean water zone 6 through a third stripping mechanism 9-3;
step eleven: the sewage flows through chlorine sheets 16 filled in the disinfection frame 14 from top to bottom, and enters the clean water area 6 for temporary storage after being disinfected in a contact disinfection mode;
Step twelve: as the water level in the clear water area 6 gradually rises, the clear water pump 15 gradually floats up to a preset point from the carried float, and then starts pumping water;
step thirteen: the extracted sewage is discharged or recycled through a drain pipe 7;
Step fourteen: as the liquid level in the clear water zone 6 drops, the clear water pump 15 is automatically turned off when the float is lowered to the bottom of the tank.
Thirteen specific embodiments: in the sixth step, the intermittent aeration mode is to control the opening and closing of the electromagnetic valve system (electromagnetic valve 22-2) by the timer 21, so as to control whether the aeration tube 10-2 is aerated or not, and realize the gap aeration. The operation adopts 12h as an operation period, and 2 periods a day. Each period comprises 5 time periods of a water inlet period, an intermittent aeration first period, an aerobic period, an intermittent aeration second period, a precipitation period and the like. Wherein water is fed for 15min, the intermittent aeration period is 1h, the intermittent aeration period comprises 4 cycles (each cycle comprises 5min of aeration, 10min of stopping aeration, and total four cycles are 1 h); the aerobic period is 8 hours, the intermittent aeration period is 1 hour, and four cycles are contained (each cycle comprises 5 minutes of aeration, 10 minutes of aeration stopping and 1 hour of total four cycles); the precipitation period was 1 hour and 45 minutes. The aim that most of organic matters in sewage are oxidized into carbon dioxide, water and ammonia nitrogen into nitrate under the action of aerobic activated sludge is fulfilled; in the anoxic environment under the condition of stopping aeration, denitrifying bacteria in the sludge convert nitrate nitrogen into nitrogen, so that the total nitrogen is finally removed, and the anoxic and aerobic alternate running environment is also beneficial to the removal of phosphorus.
The invention can meet the requirement of minimum earth covering depth and freezing line. The whole device is buried underground, and only the electric cabinet 24 is arranged on the ground.
Each breather pipe is connected with the aeration pump 23 through the electromagnetic valve system, after the aeration pump 23 works, gas flows downwards through the corresponding breather pipe, a certain attractive force is formed at the joint of each breather pipe and the lifting pipe 11, the sludge pipe 19 or the clear water pipe 20, and the gas which is communicated and input by the mixed liquor is lifted to another position through the mixed liquor lifting pipe.
Example 1:
The diameter of the reaction barrel is 1.5m, the height is 1.5m, the volume ratio of the first septic tank area 2 to the second septic tank area 3 to the regulating tank 4 to the biological reaction area 5 to the clean water area 6 is 2:1:1:2:2, the operation effect is: the COD of the inflow water is 312-342 mg/L, and the COD of the outflow water is 10.2-15.2 mg/L; the ammonia nitrogen in the inlet water is 14.3-18.7 mg/L, and the ammonia nitrogen in the outlet water is 0.9-1.3 mg/L; the total nitrogen of the inlet water is 38-48 mg/L, and the total nitrogen of the outlet water is 14.3-18.7 mg/L; the total phosphorus of the inlet water is 4.06-5.29 mg/L, and the total phosphorus of the outlet water is 1.39-2.48 mg/L. The sludge concentration in the biological reaction area is 3573-4300 mg/L.
The sewage is connected with the reaction barrel through the water inlet pipe 1, and the sewage flows into the first septic tank area 2, the second septic tank area 3 and the adjusting area 4 by gravity. The excrement is settled at the bottoms of the first septic tank area 2 and the second septic tank area 3 and is periodically cleaned, and the settled sewage subsequently enters the regulating area 4. A first air stripping mechanism 9-1 is arranged in the adjusting zone 4 to lift the sewage to the biological reaction zone 5. A filler 13 is arranged in the biological reaction zone 5, an aeration pipe 10-2 is arranged at the bottom, and a middle water pipe 17 is arranged in the middle of a partition plate between the biological reaction zone 5 and the clear water zone 6; the clear water zone 6 is internally provided with a mud/water alternate discharge and extraction system, a disinfection frame 14 filled with disinfection sheets (chlorine sheets 16) and a clear water pump 15 with a buoy. The sludge/water alternate discharge and gas extraction system lifts the sludge and sewage in the middle water pipe 17 of the biological reaction zone 5 according to the sludge and sewage, and the sludge/water alternate discharge and gas extraction system comprises the middle water pipe 17, the second gas stripping mechanism 9-2, the third gas stripping mechanism 9-3 and the connecting inclined pipe 18. After the first air stripping mechanism 9-1 lifts the sewage to the biological reaction zone 5, the removal of pollutants is completed according to program control, and then the mud-water separation is completed through precipitation. Although the clear water zone 6 is arranged above the middle water passing pipe 17, the sludge entering during the aerobic reaction is accumulated in the middle water passing pipe 17 and the connecting inclined pipe 18, the sludge is required to be discharged to the first septic tank zone 2 as surplus sludge, the second stripping mechanism 9-2 is started to return the sludge in the connecting inclined pipe 18 to the first septic tank zone 2, and then the third stripping mechanism 9-3 is started to transfer clear water at the position of the middle water passing pipe 17 in the biological reaction zone 5 to the clear water zone 6 for temporary storage after passing through the sterilizing frame 14 filled with sterilizing sheets. The fresh water pump 15 in the fresh water section 6 then starts the drainage. The aeration pump 23 is respectively connected with the first air stripping mechanism 9-1, the mud/water alternate discharge air stripping system and the aeration pipe 10-2, and the timer 21 controls the electromagnetic valve system to realize the opening of each air pipeline.
The invention is characterized in that a small sewage treatment device is provided, wherein the septic tank and the sewage treatment tank are combined and built, and sewage lifting, sewage anoxic mixing and aerobic treatment, residual sludge discharge and sewage lifting are realized by adopting the driving of an aeration pump 23. When the aeration device is applied, the aeration pump 23, the timer 21 and the electromagnetic valve system are placed in the electric cabinet 24, the aeration pump 23 is respectively connected with the first air stripping mechanism 9-1, the mud/water alternate discharge air stripping system and the aeration pipe 10-2 through the electromagnetic valve system, and the opening of the electromagnetic valve system is controlled by the timer 21 for 24 hours. The electromagnetic valve system connected with the aeration pump 23 is opened at different time periods by adopting the timer 21, so that the sewage lifting, intermittent aeration, sludge discharge and clear water lifting are respectively completed.
The device has the advantages of low operation and maintenance cost, small equipment volume and compact structure, has the capability of separating manure from water and removing organic matters, nitrogen and phosphorus in pollutants, has strong capability of resisting water quality and water quantity change, can realize modularized production, and solves the technical requirements of simple maintenance and standard emission of small-sized small-water quantity sewage.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (9)
1. The utility model provides an integration small-size sewage treatment plant, includes inlet tube (1), its characterized in that: the sewage treatment device also comprises a reaction barrel and an electric cabinet (24); the reaction barrel is vertically arranged and is divided into a first septic tank area (2), a second septic tank area (3), a regulating area (4), a biological reaction area (5) and a clear water area (6) through a partition plate, and an inspection opening (33) is formed in the top of the reaction barrel; the water inlet pipe (1) is communicated with the first septic tank region (2), the first septic tank region (2) is communicated with the second septic tank region (3) and the second septic tank region (3) is communicated with the adjusting region (4) through the overflow pipe (8), the adjusting region (4) is communicated with the biological reaction region (5) through the first air stripping mechanism (9-1), the biological reaction region (5) is internally provided with an aeration pipe (10-2), an aeration disc (12) and a filler (13), the aeration disc (12) is positioned at the lower end of the filler (13), the lower end of the aeration pipe (10-2) is communicated with the air inlet end of the aeration disc (12), the upper end of the aeration pipe (10-2) is connected with the electric cabinet (24), a drain pipe (7), a disinfection frame (14), a clean water pump (15) and a mud/water alternate discharge and extraction system are arranged in the clean water area (6); the disinfection frame (14) is filled with chlorine sheets (16) and is communicated with a mud/water alternate discharge and extraction system, the clean water pump (15) is placed at the bottom of the clean water zone (6) and is communicated with the water inlet of the drain pipe (7), the water outlet of the drain pipe (7) extends to the ground, and the electric cabinet (24) comprises a timer (21), an electromagnetic valve system and an aeration pump (23); one end of the electromagnetic valve system is connected with the aeration pump (23), the other end of the electromagnetic valve system is respectively connected with the first gas stripping mechanism (9-1), the aeration pipe (10-2) and the mud/water alternate discharge gas stripping system, and the electromagnetic valve system is set through the timer (21); the first air stripping mechanism (9-1) comprises an air pipe I (10-1) and a lifting pipe (11), wherein the air pipe I (10-1) and the lifting pipe (11) are vertically arranged, the upper end of the air pipe I (10-1) is connected with an electromagnetic valve I (22-1), the lower end of the air pipe I (10-1) is communicated with the lower end of the lifting pipe (11), and the upper end of the lifting pipe (11) is communicated with the biological reaction zone (5); the mud/water alternate discharge gas stripping system comprises a middle water pipe (17), a connecting inclined pipe (18), a second gas stripping mechanism (9-2) and a third gas stripping mechanism (9-3); the upper end of the middle water passing pipe (17) is communicated with the biological reaction zone (5), the lower end of the middle water passing pipe (17) is communicated with one end of a connecting inclined pipe (18), the other end of the connecting inclined pipe (18) is communicated with a second stripping mechanism (9-2), and the middle part of the connecting inclined pipe (18) is communicated with a third stripping mechanism (9-3); the second stripping mechanism (9-2) comprises a vent pipe II (10-3) and a sludge pipe (19), the upper end of the vent pipe II (10-3) is connected with a solenoid valve III (22-3), the lower end of the vent pipe II (10-3) is communicated with the lower end of the sludge pipe (19), the bottom of the sludge pipe (19) is communicated with the other end of the connecting inclined pipe (18), and the upper end of the sludge pipe (19) is communicated with the septic tank I region (2); the third stripping mechanism (9-3) comprises a vent pipe III (10-4) and a clear water pipe (20), the upper end of the vent pipe III (10-4) is connected with a solenoid valve IV (22-4), the lower end of the vent pipe III (10-4) is communicated with the lower end of the clear water pipe (20), the bottom of the clear water pipe (20) is communicated with the middle of a connecting inclined pipe (18), and the upper end of the clear water pipe (20) is communicated with a sterilizing frame (14).
2. An integrated miniature sewage treatment device according to claim 1, wherein: the clean water pump (15) is provided with a float.
3. An integrated miniature sewage treatment device according to claim 1, wherein: the reaction barrel is made of steel, plastic or concrete.
4. An integrated small sewage treatment device according to claim 3, wherein: the plastic is glass fiber reinforced plastic or PP material or PVC material.
5. An integrated miniature sewage treatment device according to claim 1, wherein: the inclination angle of the connecting inclined tube (18) is 15-30 degrees.
6. An integrated miniature sewage treatment device according to claim 1, wherein: the filler (13) occupies 3/4 of the volume of the biological reaction zone (5) and is positioned 20-25 cm below the designed water level.
7. An integrated miniature sewage treatment device according to claim 6, wherein: the filler (13) is spherical porous suspension filler or suspension type fixed filler.
8. An integrated small-scale sewage treatment method implemented by the device of any one of claims 1-7, characterized in that: the method comprises the following steps:
Step one: the small domestic sewage is directly communicated with the water inlet pipe (1) through a sewer and enters a septic tank first area (2) communicated with the water inlet pipe (1);
Step two: the excrement is deposited in the first septic tank area (2) in the first step, and sewage enters the second septic tank area (3) through the corresponding overflow pipe (8);
Step three: after the sewage is further precipitated in the second septic tank region (3), the sewage enters the regulating region (4) through the corresponding overflow pipe (8);
Step four: temporarily storing the sewage precipitated twice in the second step and the third step in the regulating area (4), starting an electromagnetic valve system until a timer (21) is started for a preset time, starting a first air stripping mechanism (9-1), and lifting the sewage in the regulating area (4) into a biological reaction area (5);
step five: closing the electromagnetic valve system after the preset time is over;
Step six: in the biological reaction zone (5), starting an electromagnetic valve system to treat sewage in an intermittent aeration mode through a preset program;
Step seven: through intermittent aeration in the step six, the middle water pipe (17) and the connecting inclined pipe (18) enter the mud-water mixed liquid;
Step eight: closing the electromagnetic valve system, performing sedimentation in the biological reaction zone (5), starting an electromagnetic valve III (22-3) of the electromagnetic valve system by a timer (21) after the sedimentation period is finished, starting a second stripping mechanism (9-2), extracting and discharging a residual muddy water mixed solution in the middle water pipe (17) and the connecting inclined pipe (18), and refluxing the muddy water mixed solution into the first zone (2) of the septic tank through a sludge pipe (19);
Step nine: after a preset time, closing a third electromagnetic valve (22-3) of the electromagnetic valve system, opening a fourth electromagnetic valve (22-4), and starting a third stripping mechanism (9-3);
step ten: the sewage is pumped into a disinfection frame (14) at the upper part of the clean water area (6) through a third stripping mechanism (9-3);
Step eleven: the sewage flows through chlorine sheets (16) filled in the disinfection frame (14), and enters a clean water area (6) for temporary storage after disinfection;
Step twelve: the clear water pump (15) starts pumping water along with the gradual rise of the water surface in the clear water zone (6);
step thirteen: the extracted sewage is discharged or recycled through a drain pipe (7);
Step fourteen: as the liquid level in the clear water zone (6) descends, the clear water pump (15) is automatically turned off when the float is lowered to the bottom of the pool.
9. The integrated small-sized sewage treatment method according to claim 8, wherein: in the step six, the intermittent aeration mode is to control the opening and closing of the electromagnetic valve system through a timer (21), so as to control whether the aeration pipe (10-2) is aerated or not, and realize gap aeration.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107814439A (en) * | 2017-12-14 | 2018-03-20 | 凌志环保股份有限公司 | A kind of new rural village domestic sewage denitrifying-dephosphorizing purifies wet land system |
| CN109809642A (en) * | 2019-03-21 | 2019-05-28 | 周鼎力 | A kind of remodeling purification tank of multi-stage aerobic processing rural households' sewage |
| CN110127954A (en) * | 2019-06-05 | 2019-08-16 | 哈尔滨工业大学 | A kind of air pump driving sewage reactor and processing method based on process control |
| CN110342768A (en) * | 2019-07-24 | 2019-10-18 | 周鼎力 | A kind of Environmental-protection septic tank |
| CN209835909U (en) * | 2019-05-05 | 2019-12-24 | 四川京宾节能环保科技有限公司 | Rural domestic sewage treatment system of formula of burying integration |
| CN211999351U (en) * | 2020-03-08 | 2020-11-24 | 哈尔滨工业大学 | Small-size sewage treatment plant of integration |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT624U1 (en) * | 1995-03-21 | 1996-02-26 | Becker Wolfgang Dipl Ing Dr Te | METHOD FOR MULTI-STAGE WASTE WATER TREATMENT AND WASTEWATER PLANT |
-
2020
- 2020-03-08 CN CN202010154695.4A patent/CN111777259B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107814439A (en) * | 2017-12-14 | 2018-03-20 | 凌志环保股份有限公司 | A kind of new rural village domestic sewage denitrifying-dephosphorizing purifies wet land system |
| CN109809642A (en) * | 2019-03-21 | 2019-05-28 | 周鼎力 | A kind of remodeling purification tank of multi-stage aerobic processing rural households' sewage |
| CN209835909U (en) * | 2019-05-05 | 2019-12-24 | 四川京宾节能环保科技有限公司 | Rural domestic sewage treatment system of formula of burying integration |
| CN110127954A (en) * | 2019-06-05 | 2019-08-16 | 哈尔滨工业大学 | A kind of air pump driving sewage reactor and processing method based on process control |
| CN110342768A (en) * | 2019-07-24 | 2019-10-18 | 周鼎力 | A kind of Environmental-protection septic tank |
| CN211999351U (en) * | 2020-03-08 | 2020-11-24 | 哈尔滨工业大学 | Small-size sewage treatment plant of integration |
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