CN115974345A - Hospital sewage treatment system based on biological contact oxidation method - Google Patents
Hospital sewage treatment system based on biological contact oxidation method Download PDFInfo
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Abstract
The invention discloses a hospital sewage treatment system based on a biological contact oxidation method, which relates to the technical field of medical sewage treatment, and comprises a biological contact oxidation treatment device, a water quality monitoring device and an automatic control device, wherein the biological contact oxidation treatment device comprises a preposed adjusting device, a biological membrane oxidation device and a post-treatment device, a water inlet of the preposed adjusting device is communicated with a water outlet of a temporary sewage storage pool, a water outlet of the preposed adjusting device is communicated with a water inlet of the biological membrane oxidation device, and a water inlet of the post-treatment device is communicated with a water outlet of the biological membrane oxidation device; the invention adopts a three-section method type treatment mode to form a treatment mode of a production line, after circulation, the sewage treatment period of the biomembrane oxidation device is equal to the whole sewage treatment period, the treatment period of the medical sewage can be compressed to 3-5 days, the sewage treatment efficiency is greatly increased, the sewage treatment period is reduced, and the COD value of the discharged sewage is more stable.
Description
Technical Field
The invention relates to the technical field of medical sewage treatment, in particular to a hospital sewage treatment system based on a biological contact oxidation method.
Background
The selection of the hospital sewage treatment process is the key of hospital sewage treatment design, and whether the process is reasonable or not directly influences the treatment effect, the engineering investment, the operation cost, the safety management and the like. The sewage treatment system design comprises sewage treatment process flow design, sludge disinfection and dehydration process design, waste gas collection, sterilization and disinfection treatment and design aiming at radioactive wastewater and heavy metal wastewater treatment systems.
The hospital sewage treatment generally adopts a biological contact oxidation tank to treat sewage, the whole treatment process is a process that the sewage can be treated in the biological contact oxidation tank for 5-10 days, and when the COD of the sewage is reduced to a qualified range, the sewage is discharged after the treatment.
The treatment method adopting the same biological contact oxidation tank has the problems that the treatment period is long, the efficiency is low, meanwhile, the quantity distribution of aerobic microbial colonies loaded on a biological oxidation film is not as uniform as the design, part of the biological film drops along with the maturation of the biological film, the biological film can drop due to the physical effects of certain gas explosion and the like, the quality of the treated sewage is not uniform in the sewage treatment process of 5-10 days due to the uneven distribution of the aerobic microbial colonies, and the COD effluent value of the treated sewage can not simply meet the standard in sampling inspection, so that the treated sewage can be considered to reach the standard;
because various liquid medicines exist in hospital sewage, the acidity and the alkalinity of the sewage cannot be predicted, if the sewage does not undergo the preposed pH value adjustment, the growth of aerobic microbial colonies can be influenced when the pH value is too high or too low after the sewage enters a biological contact oxidation pond, and the biological contact oxidation efficiency is greatly influenced.
Disclosure of Invention
In order to solve the problems of the efficiency of treating medical sewage by adopting a biological contact oxidation method and the uniformity of the treated water quality, the invention provides a hospital sewage treatment system based on the biological contact oxidation method. The following technical scheme is adopted:
the hospital sewage treatment system based on the biological contact oxidation method comprises a sewage pipe, a sewage temporary storage tank and a drainage temporary storage tank, wherein the sewage pipe is communicated with a water inlet of the sewage temporary storage tank, a water inlet of the drainage temporary storage tank is communicated with a water outlet of the hospital sewage treatment system, the hospital sewage treatment system comprises a biological contact oxidation treatment device, a water quality monitoring device and an automatic control device, the biological contact oxidation treatment device comprises a preposed adjusting device, a biological membrane oxidation device and a post-treatment device, the water inlet of the preposed adjusting device is communicated with the water outlet of the sewage temporary storage tank, the water outlet of the preposed adjusting device is communicated with the water inlet of the biological membrane oxidation device, the water inlet of the post-treatment device is communicated with the water outlet of the biological membrane oxidation device, the water quality monitoring device respectively detects COD values of water in the sewage temporary storage tank, the preposed adjusting device, the biological membrane oxidation device, the post-treatment device and the drainage temporary storage tank, and the automatic control device respectively controls the valves to be opened and closed according to the COD values detected by the water quality monitoring device;
when the pH value concentration of the water in the front adjusting device is 6.7-7.3 and the COD value is 4500-5000mg/L, the automatic control device controls the front adjusting device to discharge water to the biomembrane oxidation device;
when the COD value of the water in the biological membrane oxidation device is 70-100mg/L, the automatic control device controls the biological membrane oxidation device to discharge water to the post-treatment device;
when the COD value of the water quality in the post-treatment device is 70-75mg/L, the automatic control device controls the post-treatment device to discharge water to the temporary sewage storage tank.
Through the technical scheme, in order to ensure the efficiency of treating sewage COD by the biomembrane in the biomembrane oxidation device, the preposed adjusting device is arranged, the preposed adjusting device firstly adjusts the pH value of the medical sewage to be close to neutral, then reduces the COD value to 4500-5000mg/L, the treatment mode can be a chemical method, a physical sedimentation method or an electrodialysis method, the sewage with neutral pH value and stable and lower COD value can enter the biomembrane oxidation device, thus ensuring that the treatment efficiency of the biological contact oxidation method reaches more than 85 percent, the COD value of the treated sewage is 70-100mg/L and is discharged into a post-treatment device, and the treated sewage is further reduced and more uniform through stirring or standing, and finally the treated sewage can be discharged into a temporary sewage storage tank when the COD value is 70-75 mg/L;
the three-section method type treatment mode is adopted to form a treatment mode of an assembly line, after circulation, the sewage treatment period of one biomembrane oxidation device is equal to the whole sewage treatment period, the treatment period of medical sewage can be compressed to 3-5 days, the sewage treatment efficiency is greatly increased, the sewage treatment period is shortened, and the COD value of the discharged sewage is more stable.
Optionally, the preposed adjusting device includes a preposed water inlet valve, a preposed processing box, a preposed water homogenizing plate, a grid plate, an automatic dosing device, an acid-base adjusting valve and a pH adjusting medicine box, the preposed water homogenizing plate is provided with a water inlet in the middle of the top of the preposed processing box, a dosing port is arranged on the side of the preposed processing box, the water inlet is communicated with a water outlet of the temporary sewage storage tank through the preposed water inlet valve, the preposed water homogenizing plate is arranged in the preposed processing box and located right below the water inlet, a medicine liquid channel is arranged in the grid plate, a plurality of medicine outlets are uniformly distributed on each grid, the grid plate is fixedly arranged in the preposed processing box and located below the water homogenizing plate, the medicine liquid channel is communicated with the dosing port, the automatic dosing device is arranged on one side of the preposed processing box and communicated with the medicine liquid channel of the grid plate through the dosing port of the preposed processing box, and the outlet of the pH adjusting medicine box is communicated with the medicine inlet of the automatic dosing device through the acid-base adjusting valve.
Optionally, the preposed adjusting device further comprises a flocculant filling valve and a flocculant medicine box, and an outlet of the flocculant medicine box is communicated with a medicine inlet of the automatic medicine feeding device through the flocculant filling valve.
According to the technical scheme, the front water inlet valve is opened, sewage to be treated in the temporary sewage storage tank enters the front treatment tank body, the pH value of the sewage can be measured by a pH value measuring sensor of the automatic dosing device, different acid-base neutralizers are arranged in the pH value adjusting tank, the neutralizers are automatically blended to adjust the pH value of the sewage to 6.7-7.3, the acid-base adjusting valve is opened, the neutralizers are added into the front treatment tank body by the automatic dosing device, and dosing is stopped when the pH value is adjusted to 6.7-7.3;
at this moment, the COD flocculating agent in the flocculating agent medicine box is added, the COD flocculating agent can enable suspended matters, organic matters, sulfides, heavy metal ions and the like in the sewage to have strong removal capacity, the COD value of the sewage can be treated within 5000mg/L within a short time, the sewage is subjected to pre-treatment, stable water quality can be obtained, and the efficiency of subsequent biological contact oxidation treatment is greatly improved.
Optionally, the biofilm oxidation device includes a pre-pump, an inlet oxidation valve, a biological oxidation tank, a biological oxidation water-homogenizing plate, an upper mounting plate, a lower mounting plate, a group of filler plates, and a flexible aeration device, the biological oxidation tank is cylindrical, the top of the biological oxidation tank is provided with a water inlet, the bottom of the biological oxidation tank is provided with a water outlet, the middle of the biological oxidation tank is provided with an upper aeration port and a lower aeration port, the pre-pump is communicated with the water outlet of the pre-regulation device and the water inlet of the biological oxidation tank through the inlet oxidation valve, the biological oxidation water-homogenizing plate is arranged in the biological oxidation tank and located below the water inlet, the upper mounting plate and the lower mounting plate are respectively arranged at the upper part and the lower part of the biological oxidation tank and located below the biological oxidation water-homogenizing plate, and two ends of the group of filler plates are respectively arranged between the upper mounting plate and the lower mounting plate at equal intervals;
the flexible aeration device is respectively communicated with an upper aeration port and a lower aeration port in the middle of the biological oxidation pond, air is blown out from the lower aeration port for 10 minutes at an interval of 1-1.5 hours, and air is blown out from the upper aeration port for 10 minutes and alternately reciprocates.
Optionally, the flexible aeration device includes an air compressor, an upper aeration valve, a lower aeration valve and an annular aeration pipe, the air outlet of the air compressor is communicated with the upper aeration port through the upper aeration valve and is communicated with the lower aeration port through the lower aeration valve, a plurality of aeration holes are uniformly distributed on the annular aeration pipe, the annular aeration pipe is tightly attached to the inner wall of the biological oxidation tank, and two ends of the annular aeration pipe are respectively communicated with the upper aeration port and the lower aeration port.
Optionally, the distance between the lower aeration port of the biological oxidation tank and the tank bottom is 100-200mm, and the distance between the upper aeration port and the lower aeration port is more than 500mm.
Through the technical scheme, when the pH value concentration of water in the front adjusting device is 6.7-7.3, and the COD value is 4500-5000mg/L, the front pump is started, the inlet oxidation valve is opened, sewage is pumped into the biological oxidation tank from the front adjusting device, the packing plate generally adopts pp three-dimensional elastic packing, an aerobic biomembrane is attached to the packing plate, the aerobic biomembrane treats the sewage, and as the COD value of the water entering the biological oxidation tank is reduced to 4500-5000mg/L, large-volume aeration is not needed, a flexible aeration device is adopted, the annular aeration pipe encircles and clings to the inner wall of the biological oxidation tank, a certain turbulent flow is formed in the sewage, sufficient oxygen is provided, and physical influence on the aerobic biomembrane is avoided.
Optionally, the post-processing device comprises a post-pump, a post-processing valve, a post-processing tank and a stirring device, the top of the post-processing tank is provided with a water inlet, the bottom of the post-processing tank is provided with a water outlet, the post-pump is communicated with the water outlet of the biomembrane oxidation device and the water inlet of the post-processing tank through the post-processing valve, and the stirring device is arranged at the bottom of the post-processing tank.
Through above-mentioned technical scheme, the mode that adopts the physics stirring carries out rearmounted processing, and the stirring can set up interval 1 hour, stirs 5 minutes, and stirring vane's rotational speed sets up at 5r/min, and the main objective is the homogenization of sewage, and wherein still there is trace microorganism to handle, can further reduce the COD value of sewage, and the degree of consistency is better.
Optionally, the device further comprises a sludge tank, wherein the sludge tank is arranged below the preposed adjusting device and the biomembrane oxidation device and is communicated with a sludge discharge port arranged at the bottom of the preposed adjusting device and the biomembrane oxidation device.
Through the technical scheme, the preposed adjusting device and the biomembrane oxidation device have more precipitated sludge after running for a period of time, and a sludge discharge port can be opened at regular time to discharge the sludge.
Optionally, the water quality monitoring device includes COD detector and pH value sensor, COD detector monitoring sewage keeps in pond, leading adjusting device, biomembrane oxidation unit, rearmounted processing apparatus and the COD value of the pond normal water of drainage, quality of water pH value among the leading adjusting device of pH value sensor monitoring, automatic control device includes PLC controller and display screen, the PLC controller is connected with water quality monitoring device communication electricity to the switch of each valve of control respectively, the display screen is connected with PLC controller communication electricity for show the quality of water parameter of monitoring.
Through above-mentioned technical scheme, the quality of water COD monitoring of a plurality of water can be accomplished in real time to the COD detector to the data transmission who will monitor gives the PLC controller, and the PLC controller can accomplish a plurality of valves, the control of the automatic switch of pump in addition. The display screen can show the quality of water parameter of monitoring, and the staff of being convenient for knows sewage treatment process and result.
In summary, the invention includes at least one of the following beneficial technical effects:
the invention provides a hospital sewage treatment system based on a biological contact oxidation method, which adopts a three-section method type treatment mode to form a production line treatment mode, after circulation, the sewage treatment period of a biomembrane oxidation device is equal to the whole sewage treatment period, the treatment period of medical sewage can be compressed to 3-5 days, the sewage treatment efficiency is greatly increased, the sewage treatment period is reduced, and the COD value of the discharged sewage is more stable.
Drawings
FIG. 1 is a schematic diagram of the structural principle of the present invention;
FIG. 2 is a schematic view of the construction of the prepositioning device of the present invention;
FIG. 3 is a schematic view of the structure of the biofilm oxidation apparatus according to the present invention;
fig. 4 is a schematic diagram of the electrical device connection principle of the present invention.
Description of reference numerals: 1. a sewage pipe; 2. a temporary sewage storage tank; 100. a temporary drainage storage pool; 3. a front-mounted adjusting device; 31. a front water inlet valve; 32. a prepositive processing box body; 33. a water homogenizing plate is arranged in front; 34. a grid plate; 35. an automatic dosing device; 36. an acid-base regulating valve; 37. a pH value adjusting medicine box; 38. a flocculant filling valve; 39. a flocculant kit; 4. a biofilm oxidation device; 41. a pre-pump; 42. entering an oxidation valve; 43. a biological oxidation pond; 44. a biological oxidation water homogenizing plate; 45. hanging a carrier plate; 46. hanging a carrier plate; 47. a filler sheet; 48. an air compressor; 49. an upper aeration valve; 50. a lower aeration valve; 51. an annular aeration pipe; 5. a post-processing device; 52. a post pump; 53. a post-treatment valve; 54. a post-treatment tank 55 and a stirring device; 6. a sludge tank; 71. a COD detector; 72. a pH sensor; 8. a PLC controller; 9. a display screen.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The embodiment of the invention discloses a hospital sewage treatment system based on a biological contact oxidation method.
Referring to fig. 1-4, a hospital sewage treatment system based on a biological contact oxidation method comprises a sewage pipe 1, a temporary sewage storage tank 2 and a temporary drainage storage tank 100, wherein the sewage pipe 1 is communicated with a water inlet of the temporary sewage storage tank 2, a water inlet of the temporary drainage storage tank 100 is communicated with a water outlet of the hospital sewage treatment system, the hospital sewage treatment system comprises a biological contact oxidation treatment device, a water quality monitoring device and an automatic control device, the biological contact oxidation treatment device comprises a preposed adjusting device 3, a biological membrane oxidation device 4 and a post-treatment device 5, the water inlet of the preposed adjusting device 3 is communicated with the water outlet of the temporary sewage storage tank 2, the water outlet is communicated with the water inlet of the biological membrane oxidation device 4, the water inlet of the post-treatment device 5 is communicated with the water outlet of the biological membrane oxidation device 4, the water quality monitoring device respectively detects COD values of water in the temporary sewage storage tank 2, the preposed adjusting device 3, the biological membrane oxidation device 4, the post-treatment device 5 and the temporary drainage storage tank 100, and the automatic control device respectively controls the on and off of each valve according to the COD values detected by the water quality monitoring device;
when the pH value concentration of the water in the front adjusting device 3 is 6.7-7.3 and the COD value is 4500-5000mg/L, the automatic control device controls the front adjusting device 3 to discharge water to the biomembrane oxidation device 4;
when the COD value of the water in the biological film oxidation device 4 is 70-100mg/L, the automatic control device controls the biological film oxidation device 4 to discharge water to the post-treatment device 5;
when the COD value of the water quality in the post-treatment device 5 is 70-75mg/L, the automatic control device controls the post-treatment device 5 to discharge water to the temporary sewage storage tank 2.
In order to ensure the efficiency of treating sewage COD by a biological membrane in a biological membrane oxidation device 4, a preposed adjusting device 3 is arranged, the preposed adjusting device 3 firstly adjusts the pH value of medical sewage to be close to neutral, then reduces the COD value to 4500-5000mg/L, the treatment mode can be a chemical method, a physical sedimentation method or an electrodialysis method, the sewage with neutral pH value and stable and lower COD value can enter the biological membrane oxidation device 4, thus ensuring that the treatment efficiency of the biological contact oxidation method reaches more than 85 percent, the COD value of the treated sewage is 70-100mg/L and is discharged into a post-treatment device 5, and the treated sewage is further reduced and more uniform through stirring or standing, and finally the COD value can be discharged into a temporary sewage storage tank 2 when the COD value is 70-75 mg/L;
the three-section method type treatment mode is adopted to form a production line treatment mode, after circulation, the sewage treatment period of one biomembrane oxidation device 4 is equal to the whole sewage treatment period, the treatment period of medical sewage can be compressed to 3-5 days, the sewage treatment efficiency is greatly increased, the sewage treatment period is shortened, and the COD value of the discharged sewage is more stable.
The prepositive adjusting device 3 comprises a prepositive water inlet valve 31, a prepositive processing box body 32, a prepositive water homogenizing plate 33, a grating plate 34, an automatic medicine adding device 35, an acid-base adjusting valve 36 and a pH value adjusting medicine box 37, wherein the middle of the top of the prepositive processing box body 32 is provided with a water inlet, the side surface of the prepositive processing box body is provided with a medicine adding port, the water inlet is communicated with the water outlet of the temporary sewage storage pool 2 through the prepositive water inlet valve 31, the prepositive water homogenizing plate 33 is arranged in the prepositive processing box body 32 and is positioned right below the water inlet, a medicine liquid channel is arranged in the grating plate 34, each grating plate is uniformly provided with a plurality of medicine outlets, the grating plate 34 is fixedly arranged in the prepositive processing box body 32 and is positioned below the prepositive water homogenizing plate 33, the medicine liquid channel is communicated with the medicine adding port, the automatic medicine adding device 35 is arranged on one side of the prepositive processing box body 32 and is communicated with the medicine liquid medicine channel of the grating plate 34 through the medicine adding port of the prepositive processing box body 32, and the outlet of the pH value adjusting medicine box 37 is communicated with the medicine inlet of the automatic medicine adding device 35 through the acid-base adjusting valve 36.
The preposed adjusting device 3 further comprises a flocculant filling valve 38 and a flocculant medicine box 39, and an outlet of the flocculant medicine box 39 is communicated with a medicine inlet of the automatic medicine feeding device 35 through the flocculant filling valve 38.
The method comprises the following steps that a front water inlet valve 31 is opened, sewage to be treated in a temporary sewage storage tank 2 enters a front treatment tank 32, a pH value measuring sensor of an automatic dosing device 35 measures the pH value of the sewage, different acid-base neutralizers are arranged in a pH value adjusting medicine box 37, the neutralizers are automatically blended to adjust the pH value of the sewage to 6.7-7.3, an acid-base adjusting valve 36 is opened, the neutralizers are added into the front treatment tank 32 by the automatic dosing device 35, and dosing is stopped when the pH value is adjusted to 6.7-7.3;
at the moment, the COD flocculating agent in the flocculating agent medicine box 39 is added, the COD flocculating agent can enable suspended matters, organic matters, sulfides, heavy metal ions and the like in the sewage to have strong removal capacity, the COD value of the sewage can be treated within 5000mg/L in a short time, the sewage subjected to pre-treatment can obtain stable water quality, and the efficiency of subsequent biological contact oxidation treatment is greatly improved.
The biological film oxidation device 4 comprises a preposed pump 41, an inlet oxidation valve 42, a biological oxidation pond 43, a biological oxidation water homogenizing plate 44, an upper mounting plate 45, a lower mounting plate 46, a group of filler plates 47 and a flexible aeration device, wherein the biological oxidation pond 43 is cylindrical, the top of the biological oxidation pond is provided with a water inlet, the bottom of the biological oxidation pond is provided with a water outlet, the middle of the biological oxidation pond is provided with an upper aeration port and a lower aeration port, the preposed pump 41 is communicated with the water outlet of the preposed adjusting device 3 and the water inlet of the biological oxidation pond 43 through the inlet oxidation valve 42, the biological oxidation water homogenizing plate 44 is arranged in the biological oxidation pond 43 and is positioned below the water inlet, the upper mounting plate 45 and the lower mounting plate 46 are respectively arranged at the upper part and the lower part in the biological oxidation pond 43 and are positioned below the biological oxidation water homogenizing plate 44, and two ends of the group of the filler plates 47 are respectively arranged between the upper mounting plate 45 and the lower mounting plate 46 at equal intervals;
the flexible aeration device is respectively communicated with an upper aeration port and a lower aeration port in the middle of the biological oxidation pond 43, air is blown out from the lower aeration port for 10 minutes at intervals of 1-1.5 hours, and air is blown out from the upper aeration port for 10 minutes and alternately reciprocates.
The flexible aeration device comprises an air compressor 48, an upper aeration valve 49, a lower aeration valve 50 and an annular aeration pipe 51, wherein the air outlet of the air compressor 48 is communicated with the upper aeration port through the upper aeration valve 49 and is communicated with the lower aeration port through the lower aeration valve 50, a plurality of aeration holes are uniformly distributed on the annular aeration pipe 51, the annular aeration pipe 51 is tightly attached to the inner wall of the biological oxidation tank 43, and two ends of the annular aeration pipe are respectively communicated with the upper aeration port and the lower aeration port.
The distance between the lower aeration port of the biological oxidation tank 43 and the bottom of the tank is 100-200mm, and the distance between the upper aeration port and the lower aeration port is more than 500mm.
The pH value concentration of the water quality in the front adjusting device 3 is 6.7-7.3, and simultaneously, when the COD value is 4500-5000mg/L, the front pump 41 is started, the inlet oxidation valve 42 is opened, the sewage is pumped into the biological oxidation tank 43 from the front adjusting device 3, one group of filler plates 47 generally adopt pp three-dimensional elastic fillers, aerobic biofilms are attached to the filler plates, the aerobic biofilms treat the sewage, as the COD value of the water quality entering the biological oxidation tank 43 is reduced to 4500-5000mg/L, large-air-volume aeration is not needed, a flexible aeration device is adopted, the annular aeration pipe 51 surrounds and is tightly attached to the inner wall of the biological oxidation tank 43, a certain amount of disturbed flow is formed in the sewage, sufficient oxygen is provided, and the physical influence on the aerobic biofilms is avoided.
The post-treatment device 5 comprises a post-pump 52, a post-treatment valve 53, a post-treatment tank 54 and a stirring device 55, wherein the top of the post-treatment tank 54 is provided with a water inlet, the bottom of the post-treatment tank 54 is provided with a water outlet, the post-pump 52 is communicated with the water outlet of the biofilm oxidation device 4 and the water inlet of the post-treatment tank 54 through the post-treatment valve 53, and the stirring device 55 is arranged at the bottom of the post-treatment tank 54.
The mode of adopting the physics stirring carries out rearmounted processing, and the stirring can set up interval 1 hour, stirs 5 minutes, and stirring vane's rotational speed sets up at 5r/min, and the homogenization of main objective sewage still has trace microorganism to handle wherein, can further reduce the COD value of sewage, and the degree of consistency is better.
Still include sludge impoundment 6, sludge impoundment 6 sets up in leading adjusting device 3 and biomembrane oxidation unit 4's below to with leading adjusting device 3 and the mud discharging mouth intercommunication that the biomembrane oxidation unit 4 bottom set up.
The preposed adjusting device 3 and the biological film oxidation device 4 have more precipitated sludge after running for a period of time, and a sludge discharge port can be opened at regular time to discharge the sludge.
The water quality monitoring device comprises a COD detector 71 and a pH value sensor 72, the COD detector 71 monitors the COD value of water in the temporary sewage storage pool 2, the prepositive adjusting device 3, the biomembrane oxidation device 4, the post-treatment device 5 and the temporary drainage storage pool 100, the pH value sensor 72 monitors the pH value of water quality in the prepositive adjusting device 3, the automatic control device comprises a PLC (programmable logic controller) 8 and a display screen 9, the PLC 8 is electrically connected with the water quality monitoring device in a communication way and respectively controls the on-off of each valve, and the display screen 9 is electrically connected with the PLC 8 in a communication way and is used for displaying monitored water quality parameters.
The COD detector 71 can complete the water quality COD monitoring of a plurality of water bodies in real time, the monitored data is transmitted to the PLC 8, the PLC 8 can complete a plurality of valves and the control of an automatic switch of a pump. The display screen 9 can show the quality of water parameter of monitoring, and the staff of being convenient for knows sewage treatment process and result.
The invention relates to a hospital sewage treatment system based on a biological contact oxidation method, which has the following specific implementation principle:
in a sewage treatment application scene of a certain hospital, sewage is discharged to a sewage temporary storage tank 2 through a sewage pipe 1, a front water inlet valve 31 is opened, the sewage to be treated in the sewage temporary storage tank 2 enters a front treatment tank body 32, a pH value measuring sensor of an automatic dosing device 35 measures the pH value of the sewage, the pH value measuring value is 8.8 at the moment, the sewage is alkaline, a pH value adjusting medicine box 37 automatically allocates an acid neutralizer to adjust the pH value of the sewage to 7.2, and dosing is stopped; at this time, a COD flocculant in a flocculant medicine box 39 is added, the COD flocculant can enable suspended matters, organic matters, sulfides, heavy metal ions and the like in the sewage to have strong removal capacity, the COD value of the sewage can be treated within 5000mg/L within a short time, the COD detector 71 measures that the COD value of the sewage in the preposed treatment box 32 is 4850 +/-50 mg/L, the pH value sensor 72 monitors that the pH value of the water in the preposed adjusting device 3 is 7.1, the PLC 8 controls the starting of the preposed pump 41 and opens the inlet oxidation valve 42, the sewage is pumped into the biological oxidation tank 43 from the preposed adjusting device 3, the sewage is treated by the aerobic biofilm, the flexible aeration device controls the gas blown out from the lower aeration port for 10 minutes at intervals of 1 hour, the gas is blown out from the upper aeration port for 10 minutes and alternately reciprocates, a certain turbulence is formed in the sewage, sufficient oxygen is provided, and the physical influence on the aerobic biofilm is avoided, and the oxidation efficiency of the biofilm oxidation can reach more than 88% under the oxidation scene.
When the COD detector 71 detects that the COD value of the sewage in the biological oxidation tank 43 is 90 +/-20 mg/L, the post pump 52 is opened, the post treatment valve 53 is opened, the treated sewage enters the post treatment tank 54 and is subjected to post treatment in a physical stirring mode, the stirring is set at an interval of 1 hour and is stirred for 5 minutes, the rotating speed of the stirring blades is set at 5r/min, the main purpose is the homogenization of the sewage, trace microorganisms are also contained in the sewage for treatment, the COD value of the sewage is further reduced, and when the COD detector 71 detects that the sewage value in the post treatment tank 54 is stabilized at 75 +/-5 mg/L, the water is placed into the temporary COD storage tank 2 for draining.
When the prepositive treatment box body 32, the biological oxidation pond 43 and the post-treatment pond 54 are drained, the water inlet valve at the front end is in a closed state, and after the water is drained and needs to be kept stand for 10-30 minutes, the valve at the front end can be opened to drain water, so that a production line type sewage treatment flow is formed, and the sewage treatment efficiency is greatly increased.
The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (9)
1. Hospital sewage treatment system based on biological contact oxidation method, including sewage pipe (1), sewage pond (2) and the drainage pond (100) of keeping in, sewage pipe (1) and the water inlet intercommunication of sewage pond (2) of keeping in, the water inlet of drainage pond (100) of keeping in communicates its characterized in that with hospital sewage treatment system's outlet: the hospital sewage treatment system comprises a biological contact oxidation treatment device, a water quality monitoring device and an automatic control device, wherein the biological contact oxidation treatment device comprises a preposed adjusting device (3), a biomembrane oxidation device (4) and a post-treatment device (5), a water inlet of the preposed adjusting device (3) is communicated with a water outlet of a temporary sewage storage pool (2), the water outlet is communicated with a water inlet of the biomembrane oxidation device (4), a water inlet of the post-treatment device (5) is communicated with a water outlet of the biomembrane oxidation device (4), the water quality monitoring device respectively detects COD values of water in the temporary sewage storage pool (2), the preposed adjusting device (3), the biomembrane oxidation device (4), the post-treatment device (5) and a temporary drainage storage pool (100), and the automatic control device respectively controls the on-off of each valve according to the COD value detected by the water quality monitoring device;
when the pH value concentration of the water in the front adjusting device (3) is 6.7-7.3 and the COD value is 4500-5000mg/L, the automatic control device controls the front adjusting device (3) to discharge water to the biomembrane oxidation device (4);
when the COD value of the water in the biological film oxidation device (4) is 70-100mg/L, the automatic control device controls the biological film oxidation device (4) to discharge water to the post-treatment device (5);
when the COD value of the water quality in the post-treatment device (5) is 70-75mg/L, the automatic control device controls the post-treatment device (5) to discharge water to the temporary sewage storage tank (2).
2. The hospital sewage treatment system based on bio-contact oxidation method according to claim 1, wherein: leading adjusting device (3) are including leading water intaking valve (31), leading processing box (32), leading even water board (33), grid board (34), automatic reagent feeding device (35), acid-base governing valve (36) and pH value regulation medical kit (37), the centre at leading processing box (32) top is equipped with the water inlet, and the side is equipped with the medicine inlet, the water inlet passes through leading water intaking valve (31) and the delivery port intercommunication of sewage temporary storage pond (2), leading even water board (33) sets up in leading processing box (32) to be located the water inlet under, be equipped with the liquid medicine passageway in grid board (34), and a plurality of medicine outlets of equipartition on every grid, grid board (34) are fixed to be set up in leading processing box (32), are located the below of leading even water board (33), and liquid medicine passageway and medicine inlet intercommunication, automatic device (35) set up in one side of leading processing box (32), through the medicine inlet of leading processing box (32) with the medicine inlet of even water board (33) and liquid medicine inlet intercommunication, automatic reagent feeding device (35) communicate with the medicine outlet of pH value regulation medical kit (37).
3. The hospital sewage treatment system based on biological contact oxidation process according to claim 2, characterized in that: the preposed adjusting device (3) further comprises a flocculant filling valve (38) and a flocculant medicine box (39), and an outlet of the flocculant medicine box (39) is communicated with a medicine inlet of the automatic medicine feeding device (35) through the flocculant filling valve (38).
4. The hospital sewage treatment system based on biological contact oxidation process according to claim 1, characterized in that: the biological membrane oxidation device (4) comprises a preposed pump (41), an inlet oxidation valve (42), a biological oxidation pond (43), a biological oxidation water homogenizing plate (44), an upper hanging plate (45), a lower hanging plate (46), a group of filler plates (47) and a flexible aeration device, wherein the biological oxidation pond (43) is cylindrical, the top of the biological oxidation pond is provided with a water inlet, the bottom of the biological oxidation pond is provided with a water outlet, the middle of the biological oxidation pond is provided with an upper aeration port and a lower aeration port, the preposed pump (41) is communicated with the water outlet of the preposed adjusting device (3) and the water inlet of the biological oxidation pond (43) through the inlet oxidation valve (42), the biological oxidation water homogenizing plate (44) is arranged in the biological oxidation pond (43) and is positioned below the water inlet, the upper hanging plate (45) and the lower hanging plate (46) are respectively arranged at the upper part and the lower part in the biological oxidation pond (43) and are positioned below the biological oxidation water homogenizing plate (44), and two ends of the group of filler plates (47) are respectively arranged between the upper hanging plate (45) and the lower hanging plate (46) at equal intervals;
the flexible aeration device is respectively communicated with an upper aeration port and a lower aeration port in the middle of the biological oxidation tank (43), air is blown out from the lower aeration port for 10 minutes at an interval of 1-1.5 hours, and air is blown out from the upper aeration port for 10 minutes and alternately reciprocates.
5. The hospital sewage treatment system based on biological contact oxidation process according to claim 4, characterized in that: the flexible aeration device comprises an air compressor (48), an upper aeration valve (49), a lower aeration valve (50) and an annular aeration pipe (51), wherein an air outlet of the air compressor (48) is communicated with the upper aeration port through the upper aeration valve (49) and is communicated with the lower aeration port through the lower aeration valve (50), a plurality of aeration holes are uniformly distributed in the annular aeration pipe (51), the annular aeration pipe (51) is tightly attached to the inner wall of the biological oxidation tank (43), and two ends of the annular aeration pipe are respectively communicated with the upper aeration port and the lower aeration port.
6. The hospital sewage treatment system based on biological contact oxidation method according to claim 4, characterized in that: the distance between the lower aeration port of the biological oxidation tank (43) and the bottom of the tank is 100-200mm, and the distance between the upper aeration port and the lower aeration port is more than 500mm.
7. The hospital sewage treatment system based on bio-contact oxidation method according to claim 1, wherein: the post-treatment device (5) comprises a post-pump (52), a post-treatment valve (53), a post-treatment pool (54) and a stirring device (55), wherein a water inlet is formed in the top of the post-treatment pool (54), a water outlet is formed in the bottom of the post-treatment pool (54), the post-pump (52) is communicated with the water outlet of the biofilm oxidation device (4) and the water inlet of the post-treatment pool (54) through the post-treatment valve (53), and the stirring device (55) is arranged at the bottom of the post-treatment pool (54).
8. The hospital sewage treatment system based on bio-contact oxidation method according to claim 1, wherein: the device is characterized by further comprising a sludge tank (6), wherein the sludge tank (6) is arranged below the preposed adjusting device (3) and the biological film oxidation device (4) and is communicated with a sludge discharge port arranged at the bottom of the preposed adjusting device (3) and the bottom of the biological film oxidation device (4).
9. The hospital sewage treatment system based on bio-contact oxidation method according to claim 1, wherein: the water quality monitoring device comprises a COD detector (71) and a pH value sensor (72), the COD detector (71) monitors the COD value of sewage in the temporary storage pool (2), the prepositive adjusting device (3), the biomembrane oxidation device (4), the post-treatment device (5) and the drainage temporary storage pool (100), the pH value sensor (72) monitors the pH value of water quality in the prepositive adjusting device (3), the automatic control device comprises a PLC (programmable logic controller) controller (8) and a display screen (9), the PLC (8) is electrically connected with the water quality monitoring device in a communication way and respectively controls the switch of each valve, the display screen (9) is electrically connected with the PLC (8) in a communication way and is used for displaying the monitored water quality parameters.
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Cited By (1)
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Application publication date: 20230418 |