CN103304109A - Hospital wastewater treatment process equipment and hospital wastewater treatment method - Google Patents
Hospital wastewater treatment process equipment and hospital wastewater treatment method Download PDFInfo
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- CN103304109A CN103304109A CN2013102839100A CN201310283910A CN103304109A CN 103304109 A CN103304109 A CN 103304109A CN 2013102839100 A CN2013102839100 A CN 2013102839100A CN 201310283910 A CN201310283910 A CN 201310283910A CN 103304109 A CN103304109 A CN 103304109A
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Abstract
The invention provides hospital wastewater treatment process equipment and a hospital wastewater treatment method. The hospital wastewater treatment process equipment comprises an adjusting pool, a contact oxidation pool, a membrane bioreactor, a water producing pool, a sludge settling pond, a sludge storage pond and a tail gas treatment device, wherein the adjusting pool is communicated with the contact oxidation pool through a sewage lifting pump; the contact oxidation pool is communicated with the membrane bioreactor; an immersion type micro-filter membrane assembly is arranged in the membrane bioreactor; the membrane bioreactor is communicated with the water producing pool through a self-suction water pump; the upper part of the water producing pool is communicated with a sodium hypochlorite dosing device; the bottom end of the membrane bioreactor is communicated with a sludge reflux pump, the sludge settling pond and the sludge storage pond in sequence; the pipelines of the sludge settling pond and the sludge reflux pump are communicated with the sodium hypochlorite dosing device; the sludge storage pond is connected with a plate frame press filter through a pipeline provided with a screw pump. The hospital wastewater treatment process equipment has the beneficial effects that outlet water meets the requirements of medical institution water pollution discharge standards, equipment is compact, the operation is simple and convenient, the investment is low, and the operation management is safe and reliable.
Description
Technical field
The present invention relates to a kind of sewage disposal device and sewage water treatment method field, especially relate to a kind of hospital wastewater Processing Equipment and hospital wastewater treatment process.
Background technology
Hospital wastewater mainly is that the various poisonous and harmfuls that medical institutions produce in the operation process have bacterium waste water, its water quality is different with different hospitals character, scale and its location, the sewage quantity of every sick bed discharging every day is about 200-1000L, its source and complicated component, mainly constituted by waste discharges such as consulting room, ward, pathological anatomy chamber, radiation chamber, X sheet photo studio and Operation theatres, also comprise waste water such as a spot of office, washing.Contain a large amount of pathogenetic bacterias, virus and chemical agent in the hospital wastewater, have the feature of pollution, acute infection and latent infection; Principal pollutant contained in the medical waste water are: pathogenic agent, organic solvent, acid, alkali, organism, floating matter and suspended substance, radioactive pollutant etc., contain in the undressed raw waste water bacterium total amount reach 8～10/more than the mL; Hospital wastewater is as one of main source of water surrounding toxic risk, and its toxic pollutant material enters the aquatic ecological balance and the drinking water source causes potential negative impact.State Environmental Protection Administration and national quality basicity inspection and quarantine general bureau unite in July, 2005 and have issued medical institutions' pollutant emission standard " medical institutions' water emission standard " (GB18466-2005); pollutents such as the waste gas that standard produces medical institutions' sewage, sewage works, mud have proposed the requirement of comprehensive control, and have emphasized containing the sterilisation effect of pathogenic agent sewage.
Hospital wastewater of the prior art is handled and had following deficiency: the sewage of the most of hospital of China adopts directly sterilization back discharging at present, have only minority hospital to handle sterilization again through two stage biological, concentration of suspension height in the water outlet of existing sewage treatment process, bacterium and virus can adhere to or be wrapped in the suspension flco and be difficult for being sterilized the agent deactivation; Existing hospital wastewater is handled and do not removed or remove under the lower situation of efficient as yet at organism is disinfection, and not only sterilisation effect is poor, but also can produce a large amount of disinfection byproduct (DBP); Hospital wastewater is handled in the excess sludge that produces and is contained a large amount of pathogenic micro-organisms, as deals with improperly and will become the secondary pollution source.
Summary of the invention
The problem to be solved in the present invention provides a kind of water outlet and reaches " medical institutions' water emission standard " emission standard requirement (GB18466-2005), facility compact, hospital wastewater Processing Equipment easy and simple to handle and hospital wastewater treatment process especially are fit to handle hospital wastewater.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of hospital wastewater Processing Equipment comprises equalizing tank, contact-oxidation pool, membrane bioreactor, product pond, mudpan, mud storage pool, exhaust gas processing device; Upper end in the described equalizing tank is provided with grille well, is provided with at least one submersible agitator and at least one sewage pump in the described equalizing tank; The water outlet of described sewage pump is connected with the water inlet place of contact-oxidation pool, the water outlet of described contact-oxidation pool is connected with the water inlet place of described membrane bioreactor, be provided with micro-hole aerator in the described contact-oxidation pool, and be provided with semi soft packing in the described contact-oxidation pool; Be provided with the immersed microfiltration membrane module in the described membrane bioreactor, the material of described immersed microfiltration membrane module is polyvinylidene difluoride (PVDF), described membrane bioreactor is water inlet continuously, by the water outlet of self prime pump intermittent type, the time of described intermittent type water outlet and the time ratio of described continuous water inlet are 0.8, are provided with boring aeration pipe in the described membrane bioreactor; The water outlet of described self prime pump is connected with described product pond, and top, described product pond is communicated with the clorox chemicals dosing plant; The bottom of described membrane bioreactor is connected with described mudpan by sludge reflux pump, the upper end of described mudpan is connected with the water inlet place of described grille well, the bottom of described mudpan is connected with described mud storage pool by the pipeline that is provided with motorized valve, the pipeline that links to each other with described sludge reflux pump at described mudpan is communicated with the clorox chemicals dosing plant, described mud storage pool is connected with plate-and-frame filter press by the pipeline that is provided with spiral pump, is communicated with coagulating agent chemicals dosing plant and coagulant aids chemicals dosing plant on the connecting pipeline between described spiral pump and the plate-and-frame filter press; Described exhaust gas processing device comprises gas skirt, induced draft fan, high efficiency filter, described gas skirt is located at the top of described equalizing tank, contact-oxidation pool, membrane bioreactor, product pond, mudpan and mud storage pool, described gas skirt links to each other with described induced draft fan, and the other end of described induced draft fan is connected with high efficiency filter.
Further, be equipped with the ultrasonic solution level controller in described equalizing tank, membrane bioreactor, the mud storage pool; Be equipped with overflow port on described equalizing tank, the mud storage pool.
Further, be equipped with the dosing volume pump on described clorox chemicals dosing plant, coagulating agent chemicals dosing plant, the coagulant aids chemicals dosing plant.
Further, be provided with two submersible agitators and two sewage pumps in the described equalizing tank; The grid interspace of described grille well is 10-15mm.
Further, be provided with two sludge reflux pumps in the described membrane bioreactor.
Further, inside, described product pond is provided with flap.
Further, described mudpan is inclined-plate clarifying basin.
Further, establish propeller mixer in the described mud storage pool, described mud storage pool bottom is provided with two slag stock pumps.
The present invention also provides the hospital wastewater treatment process of utilizing hospital wastewater Processing Equipment described above, by comprising the steps:
(1) hospital wastewater enters equalizing tank by grille well after holding back the solid substance of large-size through grille well, after equalizing tank homogenizing homogenization treatment, enters contact-oxidation pool by sewage pump;
(2) hospital wastewater carries out aerobic oxidation and solid-liquid separation at contact-oxidation pool, removes the principal pollutant in the hospital wastewater, and the hospital wastewater overflow enters and enters the product pond by self prime pump after membrane bioreactor filters by the immersed microfiltration membrane module then;
(3) produce the pond simultaneously as sterilization pool, by the disinfection of clorox chemicals dosing plant, the hospital wastewater after sterilization carries out the overflow discharging;
(4) mud that produces in the membrane bioreactor bottom is driven in the mudpan by sludge reflux pump, by clorox to the mud disinfection, the mud of mudpan bottom discharges once to mud storage pool by motorized valve every day, the mud that deposits mud storage pool in by coagulating agent chemicals dosing plant and the dosing of coagulant aids chemicals dosing plant after, be transported to plate-and-frame filter press with the mud outward transport of dewatering by spiral pump;
(5) gas skirt is drawn the exhaust collection that equalizing tank, contact-oxidation pool, membrane bioreactor, product pond, mudpan and mud storage pool top produce, and by exhaust gas processing device waste gas is handled.
Hospital wastewater is handled pre-treatment, materialization or biological treatment and sterilization three parts that mainly comprise waste water.Hospital wastewater utilizes grille well to carry out pre-treatment and removes solid pollutant in the sewage, is in order to reduce the concentration of water pollutant, can to ensure sterilisation effect on the other hand on the one hand and adopt biological treatment; The mode that adopts membrane separation technique to be combined with the traditional biological method then can effectively reduce Sludge System water outlet pathogenic bacteria content, reduces the sterilizing agent using dosage, thereby reduces the generation of disinfection byproduct (DBP).
Advantage and positively effect that the present invention has are: owing to adopt technique scheme, have following advantage: 1. sterilisation effect is good, owing to adopt membrane bioreactor, the water outlet concentration of suspension is close to zero, and bacterium and virus have lost the protection barrier, are easy to be inactivated; 2. disinfection byproduct (DBP) is few, and membrane bioreactor goes out the required chlorine dosage of water sterilization and significantly reduces owing to have sufficient biological degradation and membrane sepn effect, thereby greatly reduces the growing amount of disinfection byproduct (DBP); 3. the sludge disposal expense is low, and the excess sludge production of membrane bioreactor is low, can save the expense of the harmless disposal of excess sludge greatly; 4. membrane bioreactor adopts submerged membrane to carry out solid-liquid separation, and good separating effect can omit two settling tanks again, produces water water quality and less sludge yield preferably relatively, has reduced the volume of mud in the mudpan; Adopting membrane bioreactor is that biologic treating technique is combined with membrane technique, realize the purpose that hydraulic detention time separates with solid retention time, keep the active sludge of higher concentration, enrichment is microorganism species efficiently, contained COD, BOD are effectively removed in the water thereby make, clearance to suspended solids can reach 100%, and saved secondary sedimentation basins, save and take up an area of, the liquid clorox mixes easily with product water and mud, sterilization effect is good, can except smell, materials such as look, manganese oxide, iron; Adopt integral type film biological reactor (MBR) and clorox sterilization process to handle hospital wastewater simultaneously, quantity of wastewater effluent is 200 m
3/ d, water outlet reaches the requirement of " medical institutions' water emission standard " (GB 18466-2005), and facility compact is easy and simple to handle, for similar engineering provides reference and reference; The present invention has advantages such as simple compact, reasonable in design, the less investment of process structure, operational management are safe and reliable, structures compact in design, every technical performance index all meets the demands simultaneously, in hospital wastewater processing engineering, has certain advantage, in addition, this hospital wastewater Processing Equipment also is applicable to other middle-size and small-size sanitary sewage disposal engineerings.
Description of drawings
Fig. 1 is structural principle synoptic diagram of the present invention.
Among the figure:
1, equalizing tank 2, contact-oxidation pool 3, membrane bioreactor
4, produce pond 5, mudpan 6, mud storage pool
7, grille well 8, motorized valve 9, submersible agitator
10, sewage pump 11, micro-hole aerator 12, immersed microfiltration film
Assembly
13, boring aeration pipe 14, self prime pump 15, clorox dosing
Device
16, sludge reflux pump 17, spiral pump 18, plate-and-frame filter press
19, gas skirt 20, induced draft fan 21, high efficiency filter
22, ultrasonic solution level controller 23, overflow port 24, slag stock pump
25, propeller mixer 26, coagulating agent chemicals dosing plant 27, coagulant aids dosing dress
Put
Embodiment
As shown in Figure 1, the invention provides a kind of hospital wastewater Processing Equipment, comprise equalizing tank 1, contact-oxidation pool 2, membrane bioreactor 3, produce pond 4, mudpan 5, mud storage pool 6, exhaust gas processing device; Upper end in the described equalizing tank 1 is provided with grille well 7, is provided with at least one submersible agitator 9 and at least one sewage pump 10 in the described equalizing tank 1; The water outlet of described sewage pump 10 is connected with the water inlet place of contact-oxidation pool 2, the water outlet of described contact-oxidation pool 2 is connected with the water inlet place of described membrane bioreactor 3, be provided with micro-hole aerator 11 in the described contact-oxidation pool 2, and be provided with semi soft packing in the described contact-oxidation pool 2; Be provided with immersed microfiltration membrane module 12 in the described membrane bioreactor 3, the material of described immersed microfiltration membrane module 12 is polyvinylidene difluoride (PVDF), described membrane bioreactor 3 is water inlet continuously, by self prime pump 14 intermittent type water outlets, the time of described intermittent type water outlet and the time ratio of described continuous water inlet are 0.8, be provided with boring aeration pipe 13 in the described membrane bioreactor 3, by boring aeration pipe 13 aerations; The water outlet of described self prime pump 14 is connected with described product pond 4, and 4 tops, described product pond are communicated with clorox chemicals dosing plant 15; The bottom of described membrane bioreactor 3 is connected with described mudpan 5 by sludge reflux pump 16, the upper end of described mudpan 5 is connected with the water inlet place of described grille well 7, the bottom of described mudpan 5 is connected with described mud storage pool 6 by the pipeline 28 that is provided with motorized valve 8, be communicated with clorox chemicals dosing plant 15 at described mudpan 5 with the pipeline that described sludge reflux pump 16 links to each other, described mud storage pool 6 is connected with plate-and-frame filter press 18 by the pipeline that is provided with spiral pump 17, is communicated with coagulating agent chemicals dosing plant 26 and coagulant aids chemicals dosing plant 27 on the connecting pipeline between described spiral pump 17 and the plate-and-frame filter press 18; Described exhaust gas processing device comprises gas skirt 19, induced draft fan 20, high efficiency filter 21, described gas skirt 19 is located at the top of described equalizing tank 1, contact-oxidation pool 2, membrane bioreactor 3, product pond 4, mudpan 5 and mud storage pool 6, described gas skirt 19 links to each other with described induced draft fan 20, and the other end of described induced draft fan 20 is connected with high efficiency filter 21.
Be equipped with ultrasonic solution level controller 22 in described equalizing tank 1, membrane bioreactor 3, the mud storage pool 6; Be equipped with overflow port 23 on described equalizing tank 1, the mud storage pool 6.
Be equipped with the dosing volume pump on described clorox chemicals dosing plant 15, coagulating agent chemicals dosing plant 26, the coagulant aids chemicals dosing plant 27.
Be provided with two submersible agitators 9 and two sewage pumps 10 in the described equalizing tank 1, described submersible agitator 9 and sewage pump 10 are respectively as the using and the reserved; Described grille well 7 is built jointly with equalizing tank 1, adopts underground concrete structure, and the grid interspace of described grille well 7 is 10-15mm.
Described contact-oxidation pool 2 is built jointly with described membrane bioreactor 3, adopt underground reinforced concrete structure, water overflow in the described contact-oxidation pool 2 enters membrane bioreactor 3, is provided with two sludge reflux pumps 16 in the described membrane bioreactor 3, described sludge reflux pump 16 the using and the reserved.
Described product pond 4 is simultaneously as sterilization pool, and 4 inside, described product pond are provided with flap, increases the duration of contact of sewage and sodium hypochlorite, after sterilization is finished, produces the clear water overflow discharging in the pond 4.
Described mudpan 5 is inclined-plate clarifying basin, adopts underground reinforced concrete structure, and supernatant liquor is back to equalizing tank 1, and the mud of described mudpan 5 bottoms discharges once to mud storage pool 6 by motorized valve 8 every days.
Establish propeller mixer 25 in the described mud storage pool 6, described mud storage pool 6 adopts underground reinforced concrete structure, and described mud storage pool 6 bottoms are provided with two slag stock pumps 24, the using and the reserved.
Utilize the hospital wastewater treatment process of hospital wastewater Processing Equipment described above, by comprising the steps:
(1) hospital wastewater enters equalizing tank 1 by grille well 7 after holding back the solid substance of large-size through grille well 7, after equalizing tank 1 homogenizing homogenization treatment, enters contact-oxidation pool 2 by sewage pump 10;
(2) hospital wastewater carries out aerobic oxidation and solid-liquid separation at contact-oxidation pool 2, remove the principal pollutant in the hospital wastewater, the hospital wastewater overflow enters and enters product pond 4 by self prime pump 14 after membrane bioreactor 3 filters by immersed microfiltration membrane module 12 then;
(3) produce pond 4 simultaneously as sterilization pool, by 15 disinfections of clorox chemicals dosing plant, the hospital wastewater after sterilization carries out the overflow discharging;
(4) mud that produces in membrane bioreactor 3 bottoms is driven in the mudpan 5 by sludge reflux pump 16, by clorox to the mud disinfection, the mud of mudpan 5 bottoms discharges once to mud storage pool 6 by motorized valve 8 every days, the mud that deposits mud storage pool 6 in by coagulating agent chemicals dosing plant 26 and 27 dosings of coagulant aids chemicals dosing plant after, be transported to plate-and-frame filter press 18 with the mud outward transport of dewatering by spiral pump 17;
(5) gas skirt 19 is drawn the exhaust collection that equalizing tank 1, contact-oxidation pool 2, membrane bioreactor 3, product pond 4, mudpan 5 and mud storage pool 6 tops produce, by exhaust gas processing device waste gas is handled, exhaust gas processing device is held back respond well to the microorganism particle in the aeration tail gas, can reduce membrane bioreactor greatly because of the issuable secondary pollution of aerosol diffusion and threat.
More than one embodiment of the present of invention are had been described in detail, but described content only is preferred embodiment of the present invention, can not be considered to for limiting practical range of the present invention.All equalizations of doing according to the present patent application scope change and improve etc., all should still belong within the patent covering scope of the present invention.
Claims (9)
1. a hospital wastewater Processing Equipment is characterized in that: comprise equalizing tank, contact-oxidation pool, membrane bioreactor, product pond, mudpan, mud storage pool, exhaust gas processing device; Upper end in the described equalizing tank is provided with grille well, is provided with at least one submersible agitator and at least one sewage pump in the described equalizing tank; The water outlet of described sewage pump is connected with the water inlet place of contact-oxidation pool, the water outlet of described contact-oxidation pool is connected with the water inlet place of described membrane bioreactor, be provided with micro-hole aerator in the described contact-oxidation pool, and be provided with semi soft packing in the described contact-oxidation pool; Be provided with the immersed microfiltration membrane module in the described membrane bioreactor, the material of described immersed microfiltration membrane module is polyvinylidene difluoride (PVDF), described membrane bioreactor is water inlet continuously, by the water outlet of self prime pump intermittent type, the time of described intermittent type water outlet and the time ratio of described continuous water inlet are 0.8, are provided with boring aeration pipe in the described membrane bioreactor; The water outlet of described self prime pump is connected with described product pond, and top, described product pond is communicated with the clorox chemicals dosing plant; The bottom of described membrane bioreactor is connected with described mudpan by sludge reflux pump, the upper end of described mudpan is connected with the water inlet place of described grille well, the bottom of described mudpan is connected with described mud storage pool by the pipeline that is provided with motorized valve, the pipeline that links to each other with described sludge reflux pump at described mudpan is communicated with the clorox chemicals dosing plant, described mud storage pool is connected with plate-and-frame filter press by the pipeline that is provided with spiral pump, is communicated with coagulating agent chemicals dosing plant and coagulant aids chemicals dosing plant on the connecting pipeline between described spiral pump and the plate-and-frame filter press; Described exhaust gas processing device comprises gas skirt, induced draft fan, high efficiency filter, described gas skirt is located at the top of described equalizing tank, contact-oxidation pool, membrane bioreactor, product pond, mudpan and mud storage pool, described gas skirt links to each other with described induced draft fan, and the other end of described induced draft fan is connected with high efficiency filter.
2. hospital wastewater Processing Equipment according to claim 1 is characterized in that: be equipped with the ultrasonic solution level controller in described equalizing tank, membrane bioreactor, the mud storage pool; Be equipped with overflow port on described equalizing tank, the mud storage pool.
3. hospital wastewater Processing Equipment according to claim 1 is characterized in that: be equipped with the dosing volume pump on described clorox chemicals dosing plant, coagulating agent chemicals dosing plant, the coagulant aids chemicals dosing plant.
4. hospital wastewater Processing Equipment according to claim 1 is characterized in that: be provided with two submersible agitators and two sewage pumps in the described equalizing tank; The grid interspace of described grille well is 10-15mm.
5. hospital wastewater Processing Equipment according to claim 1 is characterized in that: be provided with two sludge reflux pumps in the described membrane bioreactor.
6. hospital wastewater Processing Equipment according to claim 1, it is characterized in that: inside, described product pond is provided with flap.
7. hospital wastewater Processing Equipment according to claim 1, it is characterized in that: described mudpan is inclined-plate clarifying basin.
8. hospital wastewater Processing Equipment according to claim 1, it is characterized in that: establish propeller mixer in the described mud storage pool, described mud storage pool bottom is provided with two slag stock pumps.
9. a hospital wastewater treatment process of utilizing each described hospital wastewater Processing Equipment of claim 1-8 is characterized in that: by comprising the steps:
(1) after hospital wastewater is held back the solid substance of large-size through grille well, enters equalizing tank by grille well, after equalizing tank homogenizing homogenization treatment, enter contact-oxidation pool by sewage pump;
(2) hospital wastewater carries out aerobic oxidation and solid-liquid separation at contact-oxidation pool, removes the principal pollutant in the hospital wastewater, and the hospital wastewater overflow enters and enters the product pond by self prime pump after membrane bioreactor filters by the immersed microfiltration membrane module then;
(3) produce the pond simultaneously as sterilization pool, by the disinfection of clorox chemicals dosing plant, the hospital wastewater after sterilization carries out the overflow discharging;
(4) mud that produces in the membrane bioreactor bottom is driven in the mudpan by sludge reflux pump, by clorox to the mud disinfection, the mud of mudpan bottom discharges once to mud storage pool by motorized valve every day, the mud that deposits mud storage pool in by coagulating agent chemicals dosing plant and the dosing of coagulant aids chemicals dosing plant after, be transported to plate-and-frame filter press with the mud outward transport of dewatering by spiral pump;
(5) gas skirt is drawn the exhaust collection that equalizing tank, contact-oxidation pool, membrane bioreactor, product pond, mudpan and mud storage pool top produce, and by exhaust gas processing device waste gas is handled.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105174626A (en) * | 2015-09-18 | 2015-12-23 | 山东大学 | Constructed wetland coupled biological reaction tank purification water-gas system |
| CN105585214A (en) * | 2015-12-29 | 2016-05-18 | 太仓弘杉环保科技有限公司 | Industrial wastewater treatment method and treatment equipment |
| WO2019024181A1 (en) * | 2017-08-01 | 2019-02-07 | 黄晓静 | Multi-approach environmentally-friendly balanced medical wastewater treatment system |
| CN109748467A (en) * | 2019-03-11 | 2019-05-14 | 秦皇岛市第一医院 | A kind of Hospital Sewage Treatment reclaimer with efficient sterilization function |
| CN113371897A (en) * | 2021-07-16 | 2021-09-10 | 张玉玲 | Environment-friendly medical wastewater deep disinfection and sterilization device with controllable residual chlorine |
| CN117059292A (en) * | 2023-08-16 | 2023-11-14 | 西南科技大学 | Pretreatment system for solid-liquid separation of nuclear medical radioactive wastewater and application method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105174626A (en) * | 2015-09-18 | 2015-12-23 | 山东大学 | Constructed wetland coupled biological reaction tank purification water-gas system |
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| CN109748467A (en) * | 2019-03-11 | 2019-05-14 | 秦皇岛市第一医院 | A kind of Hospital Sewage Treatment reclaimer with efficient sterilization function |
| CN113371897A (en) * | 2021-07-16 | 2021-09-10 | 张玉玲 | Environment-friendly medical wastewater deep disinfection and sterilization device with controllable residual chlorine |
| CN117059292A (en) * | 2023-08-16 | 2023-11-14 | 西南科技大学 | Pretreatment system for solid-liquid separation of nuclear medical radioactive wastewater and application method |
| CN117059292B (en) * | 2023-08-16 | 2024-03-29 | 西南科技大学 | Pretreatment system for solid-liquid separation of nuclear medical radioactive wastewater and application method |
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Application publication date: 20130918 |
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