CN203845916U - Integrated wastewater treatment system with gas stripping function - Google Patents
Integrated wastewater treatment system with gas stripping function Download PDFInfo
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- CN203845916U CN203845916U CN201420250971.7U CN201420250971U CN203845916U CN 203845916 U CN203845916 U CN 203845916U CN 201420250971 U CN201420250971 U CN 201420250971U CN 203845916 U CN203845916 U CN 203845916U
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- aerobic pond
- pond
- basin
- secondary aerobic
- mixing pit
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- 238000004065 wastewater treatment Methods 0.000 title abstract 3
- 238000002156 mixing Methods 0.000 claims abstract description 33
- 239000010865 sewage Substances 0.000 claims description 49
- 125000006850 spacer group Chemical group 0.000 claims description 29
- 239000000945 filler Substances 0.000 claims description 11
- 238000005273 aeration Methods 0.000 claims description 10
- 238000013022 venting Methods 0.000 claims description 4
- 239000002351 wastewater Substances 0.000 abstract description 6
- 238000005192 partition Methods 0.000 abstract 9
- 238000004062 sedimentation Methods 0.000 abstract 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 102000001999 Transcription Factor Pit-1 Human genes 0.000 description 14
- 108010040742 Transcription Factor Pit-1 Proteins 0.000 description 14
- 229910052757 nitrogen Inorganic materials 0.000 description 14
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 10
- 230000000813 microbial effect Effects 0.000 description 9
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 229910052698 phosphorus Inorganic materials 0.000 description 8
- 239000011574 phosphorus Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 239000002957 persistent organic pollutant Substances 0.000 description 6
- 230000002906 microbiologic effect Effects 0.000 description 5
- 238000010992 reflux Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000008239 natural water Substances 0.000 description 3
- 238000006396 nitration reaction Methods 0.000 description 3
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 230000001954 sterilising effect Effects 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- UPLPHRJJTCUQAY-WIRWPRASSA-N 2,3-thioepoxy madol Chemical compound C([C@@H]1CC2)[C@@H]3S[C@@H]3C[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@](C)(O)[C@@]2(C)CC1 UPLPHRJJTCUQAY-WIRWPRASSA-N 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Biological Treatment Of Waste Water (AREA)
Abstract
The utility model relates to an integrated wastewater treatment system with a gas stripping function, belonging to the field of wastewater treatment technology. In the system, a mixing basin, an anaerobic basin, a primary aerobic basin, a secondary aerobic basin and a sedimentation basin are sequentially arranged in a tank body; a first upper partition plate is arranged between the mixing basin and the anaerobic basin; the lower parts of the mixing basin and the anaerobic basin are communicated with each other; a first lower partition plate is connected between the anaerobic basin and the primary aerobic basin; the upper parts of the anaerobic basin and the primary aerobic basin are communicated with each other; a second upper partition plate is arranged between the primary aerobic basin and the secondary aerobic basin; the lower parts of the primary aerobic basin and the secondary aerobic basin are communicated with each other; a second lower partition plate and a third upper partition plate are arranged between the secondary aerobic basin and the sedimentation basin; a wastewater channel is formed between the second lower partition plate and the third upper partition plate; a wastewater channel is formed between the upper end of the second lower partition plate and the top of the tank body; a wastewater channel is formed between the lower end of the third upper partition plate and the bottom of the tank body; a gas stripping pipe is arranged in the secondary aerobic basin. By utilizing an integrated tank body structure, the system is small in occupied area, low in cost, simple to operate and suitable for rural areas in China.
Description
Technical field
The utility model relates to a kind of integrated effluent disposal system with air lift function, belongs to technical field of sewage.
Background technology
Chinese countryside sanitary sewage annual emissions is about 8,000,000,000-9,000,000,000 tons at present, and 96% village does not have discharge conduit and Sewage treatment systems.Domestic sewage in rural areas by using have have a large capacity and a wide range, organic concentration is higher, and the feature such as daily variation factor is large, intermittently discharged, control difficulty, undressed sanitary sewage discharges wantonly, enter in the lump river course nearby with rainwater, river course, lake are polluted, havoc Ecological Environment, directly threatens the healthy of mass peasants, hinders rural economic development.It is the vital task of building Socialist New that domestic sewage in rural areas by using is carried out effectively processing also qualified discharge.
Both at home and abroad sewage treatment area has had compared with proven technique, and rural area and remote districts do not have because the reason sewage disposal measure such as backward in economy still quite falls behind even at all, are not suitable for building the larger structures such as sewage work yet.On the other hand, general waste disposal plant is all transhipment and the backflow that completes sewage with water pump, relatively power consumption, pump maintenance and maintenance are also all cumbersome, take up an area the multiple limiting factors such as long-pending large and running cost is high and make the exploitation of small-sized integrated sewage disposal device become a large important task of current sewage treatment area, the while is also faced with larger challenge.
Summary of the invention
The purpose of this utility model is to provide a kind of integrated effluent disposal system with air lift function, changes the structure of existing Sewage treatment systems, to reduce the floor space of sewage disposal, reduces the running cost of sewage disposal simultaneously.
The integrated effluent disposal system with air lift function the utility model proposes, comprise mixing pit, anoxic pond, one-level Aerobic Pond, secondary Aerobic Pond and settling tank, described mixing pit, anoxic pond, one-level Aerobic Pond, secondary Aerobic Pond and settling tank are arranged in order and are placed in a tank body, mixing pit, anoxic pond, one-level Aerobic Pond, the top of secondary Aerobic Pond and settling tank is respectively equipped with access hole, anoxic pond, in one-level Aerobic Pond and secondary Aerobic Pond, be provided with filler, the bottom of one-level Aerobic Pond and secondary Aerobic Pond is respectively equipped with aeration tube, aeration tube is connected with inlet pipe, inlet pipe is by blower fan air inlet,
The sidewall of described mixing pit is provided with water-in, is provided with the first upper spacer between mixing pit and anoxic pond, and the upper end of the first upper spacer and tank body top are fixed, and mixing pit communicates with the bottom of anoxic pond;
Between described anoxic pond and one-level Aerobic Pond, be provided with the first lower clapboard, bottom and the tank base of the first lower clapboard are fixed, and the top between anoxic pond and one-level Aerobic Pond is interconnected;
Between described one-level Aerobic Pond and secondary Aerobic Pond, be provided with the second upper spacer, the upper end of the second upper spacer and tank body top are fixed, and the bottom between one-level Aerobic Pond and secondary Aerobic Pond is interconnected;
Between described secondary Aerobic Pond and settling tank, be provided with the second lower clapboard and the 3rd upper spacer, between the second lower clapboard and the 3rd upper spacer, be provided with sewage routeway, bottom and the tank base of the second described lower clapboard are fixed, between the upper end of the second lower clapboard and tank body top, leave sewage routeway, upper end and the tank body top of the 3rd described upper spacer are fixed, and between the bottom of the 3rd upper spacer and tank base, leave sewage routeway; In described secondary Aerobic Pond, be provided with stripping tube, the top of stripping tube is overflow groove, overflow groove top is provided with venting port, one side of overflow groove is connected with mixing pit by return line, the bottom of stripping tube is connected with secondary Aerobic Pond, an inlet pipe is stretched in the bottom of stripping tube, and inlet pipe is by blower fan air inlet; In described settling tank, be fixed with inclined tube, the sidewall of settling tank is provided with water outlet.
The integrated effluent disposal system with air-lift device the utility model proposes, its advantage is:
Sewage treatment systems of the present utility model, the one, select A/O Biological Contact Oxidation Process, can effectively remove organism, nitrogen, phosphorus in sewage, can be applicable in rural sewage treatment, make sewage qualified discharge after treatment; The 2nd, in treatment system, utilize air lift function, save the water pump in general Sewage treatment systems, save the maintaining of water pump and the trouble that fault is brought, thereby saved electric energy, reduced the cost of Sewage treatment systems initial stage construction and the running cost of sewage disposal; The 3rd, adopt integrated tank structure, take up an area less, cost is low, simple to operate, can promote in the Rural areas of China, has broad application prospects.
Brief description of the drawings
Fig. 1 is the structural representation of the integrated effluent disposal system with air lift function that the utility model proposes.
Fig. 2 is the structural representation of stripping tube in the Sewage treatment systems shown in Fig. 1.
In Fig. 1 and Fig. 2, the 1st, water-in, the 2nd, mixing pit, the 3rd, anoxic pond, the 4th, one-level Aerobic Pond, the 5th, secondary Aerobic Pond, the 6th, settling tank, the 7th, water outlet, the 8th, stripping tube, the 9th, venting port, the 10th, return line, the 11st, access hole, the 12nd, filler, the 13rd, aeration tube, the 14th, inlet pipe, the 15th, blower fan, the 16th, tank body, 17 is first upper spacers, 18 is first lower clapboards, 19 is second upper spacers, and 20 is second lower clapboards, and 21 is the 3rd upper spacers, the 22nd, inclined tube, the 23rd, intake valve, the 24th, aeration head, the 25th, overflow groove.
Embodiment
The integrated effluent disposal system with air lift function the utility model proposes, as shown in Figure 1, this Sewage treatment systems comprises mixing pit 2, anoxic pond 3, one-level Aerobic Pond 4, secondary Aerobic Pond 5 and settling tank 6 to its structure.Mixing pit 2, anoxic pond 3, one-level Aerobic Pond 4, secondary Aerobic Pond 5 and settling tank 6 are arranged in order and are placed in a tank body 16, and the top of mixing pit 2, anoxic pond 3, one-level Aerobic Pond 4, secondary Aerobic Pond 5 and settling tank 6 is respectively equipped with access hole 11.In anoxic pond 3, one-level Aerobic Pond 4 and secondary Aerobic Pond 5, be provided with filler 12, the bottom of one-level Aerobic Pond 4 and secondary Aerobic Pond 5 is respectively equipped with aeration tube 13, and aeration tube 13 is connected with inlet pipe 14, and inlet pipe 14 is by blower fan 15 air inlets.
The sidewall of mixing pit 2 is provided with water-in 1, and the upper end and the tank body top that between mixing pit 2 and anoxic pond 3, are provided with the first upper spacer 17, the first upper spacers 17 are fixed, and between the bottom of the first upper spacer 17 and tank base, leave sewage routeway.
The bottom and the tank base that between anoxic pond 3 and one-level Aerobic Pond 4, are provided with the first lower clapboard 18, the first lower clapboards 18 are fixed, and between the upper end of the first lower clapboard 18 and tank body top, leave sewage routeway.
The upper end and the tank body top that between one-level Aerobic Pond 4 and secondary Aerobic Pond 5, are provided with the second upper spacer 19, the second upper spacers 19 are fixed, and between the bottom of the second upper spacer 19 and tank base, leave sewage routeway.
Between secondary Aerobic Pond 5 and settling tank 6, be provided with the second lower clapboard 20 and the 3rd upper spacer 21, between the second lower clapboard 20 and the 3rd upper spacer 21, be provided with sewage routeway, bottom and the tank base of the second lower clapboard 20 are fixed, and between the upper end of the second lower clapboard 20 and tank body top, leave sewage routeway.The upper end of the 3rd upper spacer 21 and tank body top are fixed, and between the bottom of the 3rd upper spacer 21 and tank base, leave sewage routeway.
In secondary Aerobic Pond 5, be provided with stripping tube 8, the structure of stripping tube 8 as shown in Figure 2, the top of stripping tube 8 is overflow groove 25, the top of overflow groove 25 is provided with venting port 9, one side of overflow groove 25 is connected with mixing pit 2 by return line 10, and the bottom of stripping tube 8 is connected with secondary Aerobic Pond 5, and an inlet pipe 14 is stretched in the bottom of stripping tube 8, the upper end of inlet pipe is provided with an aeration head 24, and inlet pipe is by blower fan 15 air inlets.
In settling tank 6, be fixed with inclined tube 22, the sidewall of settling tank 6 is provided with water outlet 7.
The integrated effluent disposal system with air lift function the utility model proposes, the material of tank body 16 wherein can be glass reinforced plastic.The filler 10 of anoxic pond 3, one-level Aerobic Pond 4, secondary Aerobic Pond 5 can be selected combined stuffing, and specification is Ф 150-80 (element diameter 150mm, spacing 80mm), and every 15cm is a string, and media-filling rate is 75%.Inclined tube 22 aperture 80mm in settling tank 6, angle of inclination 60 is spent.
Inlet pipe 14 is stretching into after stripping tube 8, aeration head 24 is installed, to prevent the excessive current shakiness that causes of bubble.An air scoop 9 is stayed at overflow groove top, with exhausted air.
Below in conjunction with accompanying drawing, introduce in detail the working process of this Sewage treatment systems:
Sewage flow direction in system is deflector type, and raw waste water is delivered to mixing pit 2, and the water that mixing pit 2 is also accepted secondary Aerobic Pond 5 refluxes, and high loading sewage is diluted.In anoxic pond 3, on filler 12, the anaerobion of growth is decomposed some organic pollutants, and organonitrogen changes ammonia nitrogen into.In one-level Aerobic Pond 4 and secondary Aerobic Pond 5, hang filler 12, the microbial film adhering on it is further removed organic pollutant, and the outer field aerobic microbiological of microbial film is oxidized to nitre nitrogen by nitrification by ammonia nitrogen, and removes the phosphorus in water by sorption.In secondary Aerobic Pond 5, sewage is back to mixing pit 2 (reflux ratio 200-300%) by stripping tube 8 again, then enter in anoxic pond, under anoxic condition, nitric nitrogen is under anaerobion effect, change nitrogen into through anti-nitration reaction and be discharged in air, thereby complete denitrification process.The microbial film coming off precipitates at settling tank 6, and clear water, after sterilization, is finally discharged in natural water.
Introduce embodiment of the present utility model below.
Embodiment 1:
Hebei sewage work tests Sewage treatment systems of the present utility model, and January, test-results was as follows:
Raw waste water chemical oxygen demand (COD) 298mg/l, biochemical oxygen demand (BOD) 108mg/l, suspended substance 161mg/l, total nitrogen 32.1mg/l, ammonia nitrogen 19.6mg/l, total phosphorus 2.46mg/l, be transported to mixing pit 2, mixing pit is accepted the recirculation water of secondary Aerobic Pond 5, and high loading sewage is diluted.In anoxic pond 3, the microbiological deterioration some organic pollutants of growth on filler 12, organonitrogen changes ammonia nitrogen into.In one-level Aerobic Pond 4 and secondary Aerobic Pond 5, hang filler 12, the microbial film adhering on it is further removed organic pollutant, and the outer field aerobic microbiological of microbial film is oxidized to nitre nitrogen by nitrification by ammonia nitrogen, and removes the phosphorus in water by sorption.In secondary Aerobic Pond 5, sewage is back to mixing pit 2 (reflux ratio 200-300%) by stripping tube 8 again, then enter in anoxic pond, under anoxic condition, nitric nitrogen is under anaerobion effect, change nitrogen into through anti-nitration reaction and be discharged in air, thereby complete denitrification process.The microbial film coming off precipitates at settling tank 6, clear water after sterilization, last water outlet chemical oxygen demand (COD) 56.6mg/l, biochemical oxygen demand (BOD) 18.8mg/l, suspended substance 17.2mg/l, total nitrogen 18.1mg/l, ammonia nitrogen 12.5mg/l, total phosphorus 0.90mg/l, reaches the requirement of country-level B, is discharged in natural water.
Embodiment 2:
Hebei sewage work tests Sewage treatment systems of the present utility model, and August, test-results was as follows:
Raw waste water chemical oxygen demand (COD) 335mg/l, biochemical oxygen demand (BOD) 122mg/l, suspended substance 177mg/l, total nitrogen 29.8mg/l, ammonia nitrogen 21.3mg/l, total phosphorus 2.63mg/l, be transported to mixing pit 2, mixing pit 2 is also accepted secondary Aerobic Pond 5 water and is refluxed, and high loading sewage is diluted.In anoxic pond 3, the microbiological deterioration some organic pollutants of growth on filler 12, organonitrogen changes ammonia nitrogen into.In one-level Aerobic Pond 4 and secondary Aerobic Pond 5, hang filler 12, the microbial film adhering on it is further removed organic pollutant, and the outer field aerobic microbiological of microbial film is oxidized to nitre nitrogen by nitrification by ammonia nitrogen, and removes the phosphorus in water by sorption.In secondary Aerobic Pond 5, sewage is back to mixing pit 2 (reflux ratio 200-300%) by stripping tube 8 again, then enter in anoxic pond, under anoxic condition, nitric nitrogen is under anaerobion effect, change nitrogen into through anti-nitration reaction and be discharged in air, thereby complete denitrification process.The microbial film coming off precipitates at settling tank 6, clear water after sterilization, last water outlet chemical oxygen demand (COD) 51.2mg/l, biochemical oxygen demand (BOD) 15.7mg/l, suspended substance 12.4mg/l, total nitrogen 15.8mg/l, ammonia nitrogen 6.2mg/l, total phosphorus 0.88mg/l, reaches the requirement of country-level B, is discharged in natural water.
Claims (1)
1. the integrated effluent disposal system with air lift function, it is characterized in that this Sewage treatment systems comprises mixing pit, anoxic pond, one-level Aerobic Pond, secondary Aerobic Pond and settling tank, described mixing pit, anoxic pond, one-level Aerobic Pond, secondary Aerobic Pond and settling tank are arranged in order and are placed in a tank body, mixing pit, anoxic pond, one-level Aerobic Pond, the top of secondary Aerobic Pond and settling tank is respectively equipped with access hole, anoxic pond, in one-level Aerobic Pond and secondary Aerobic Pond, be provided with filler, the bottom of one-level Aerobic Pond and secondary Aerobic Pond is respectively equipped with aeration tube, aeration tube is connected with inlet pipe, inlet pipe is by blower fan air inlet,
The sidewall of described mixing pit is provided with water-in, is provided with the first upper spacer between mixing pit and anoxic pond, and the upper end of the first upper spacer and tank body top are fixed, and mixing pit communicates with the bottom of anoxic pond;
Between described anoxic pond and one-level Aerobic Pond, be provided with the first lower clapboard, bottom and the tank base of the first lower clapboard are fixed, and the top between anoxic pond and one-level Aerobic Pond is interconnected;
Between described one-level Aerobic Pond and secondary Aerobic Pond, be provided with the second upper spacer, the upper end of the second upper spacer and tank body top are fixed, and the bottom between one-level Aerobic Pond and secondary Aerobic Pond is interconnected;
Between described secondary Aerobic Pond and settling tank, be provided with the second lower clapboard and the 3rd upper spacer, between the second lower clapboard and the 3rd upper spacer, be provided with sewage routeway, bottom and the tank base of the second described lower clapboard are fixed, between the upper end of the second lower clapboard and tank body top, leave sewage routeway, upper end and the tank body top of the 3rd described upper spacer are fixed, and between the bottom of the 3rd upper spacer and tank base, leave sewage routeway; In described secondary Aerobic Pond, be provided with stripping tube, the top of stripping tube is overflow groove, overflow groove top is provided with venting port, one side of overflow groove is connected with mixing pit by return line, the bottom of stripping tube is connected with secondary Aerobic Pond, an inlet pipe is stretched in the bottom of stripping tube, and inlet pipe is by blower fan air inlet; In described settling tank, be fixed with inclined tube, the sidewall of settling tank is provided with air outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420250971.7U CN203845916U (en) | 2014-05-16 | 2014-05-16 | Integrated wastewater treatment system with gas stripping function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420250971.7U CN203845916U (en) | 2014-05-16 | 2014-05-16 | Integrated wastewater treatment system with gas stripping function |
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| Publication Number | Publication Date |
|---|---|
| CN203845916U true CN203845916U (en) | 2014-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420250971.7U Expired - Lifetime CN203845916U (en) | 2014-05-16 | 2014-05-16 | Integrated wastewater treatment system with gas stripping function |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104817176A (en) * | 2015-04-30 | 2015-08-05 | 浙江商达环保有限公司 | Pneumatic aeration lift system |
| CN105217901A (en) * | 2015-11-21 | 2016-01-06 | 杭州绿夏环境科技有限公司 | A kind of method of wastewater biochemical removing total nitrogen |
| CN106242057A (en) * | 2016-09-06 | 2016-12-21 | 山东文远建材科技股份有限公司 | Bioreactor for sewage disposal |
| CN106745752A (en) * | 2017-02-21 | 2017-05-31 | 湖南博世科华亿环境工程有限公司 | A kind of sewage disposal device and method |
| CN109734260A (en) * | 2019-03-18 | 2019-05-10 | 大连交通大学 | Sanitary sewage disposal combination unit |
| CN109928568A (en) * | 2017-12-18 | 2019-06-25 | 宜兴市江华环保科技有限公司 | City domestic sewage treatment process |
-
2014
- 2014-05-16 CN CN201420250971.7U patent/CN203845916U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104817176A (en) * | 2015-04-30 | 2015-08-05 | 浙江商达环保有限公司 | Pneumatic aeration lift system |
| CN105217901A (en) * | 2015-11-21 | 2016-01-06 | 杭州绿夏环境科技有限公司 | A kind of method of wastewater biochemical removing total nitrogen |
| CN106242057A (en) * | 2016-09-06 | 2016-12-21 | 山东文远建材科技股份有限公司 | Bioreactor for sewage disposal |
| CN106745752A (en) * | 2017-02-21 | 2017-05-31 | 湖南博世科华亿环境工程有限公司 | A kind of sewage disposal device and method |
| CN109928568A (en) * | 2017-12-18 | 2019-06-25 | 宜兴市江华环保科技有限公司 | City domestic sewage treatment process |
| CN109734260A (en) * | 2019-03-18 | 2019-05-10 | 大连交通大学 | Sanitary sewage disposal combination unit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140924 |