CN103193314B - Sludge self-circulation dispersed sewage treatment device applicable to sewage reuse and method thereof - Google Patents
Sludge self-circulation dispersed sewage treatment device applicable to sewage reuse and method thereof Download PDFInfo
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- CN103193314B CN103193314B CN201310159836.1A CN201310159836A CN103193314B CN 103193314 B CN103193314 B CN 103193314B CN 201310159836 A CN201310159836 A CN 201310159836A CN 103193314 B CN103193314 B CN 103193314B
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- 239000010865 sewage Substances 0.000 title claims abstract description 83
- 239000010802 sludge Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 65
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 239000002351 wastewater Substances 0.000 claims abstract description 15
- 230000000630 rising effect Effects 0.000 claims description 48
- 238000001556 precipitation Methods 0.000 claims description 35
- 230000007423 decrease Effects 0.000 claims description 32
- 238000005273 aeration Methods 0.000 claims description 21
- 239000011259 mixed solution Substances 0.000 claims description 21
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 244000005700 microbiome Species 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 239000002957 persistent organic pollutant Substances 0.000 claims description 3
- 230000001376 precipitating effect Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000011152 fibreglass Substances 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 230000001174 ascending effect Effects 0.000 abstract 2
- 238000002955 isolation Methods 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000010992 reflux Methods 0.000 description 4
- 238000004065 wastewater treatment Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 235000011089 carbon dioxide Nutrition 0.000 description 2
- JYYOBHFYCIDXHH-UHFFFAOYSA-N carbonic acid;hydrate Chemical compound O.OC(O)=O JYYOBHFYCIDXHH-UHFFFAOYSA-N 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 238000009293 extended aeration Methods 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000005352 clarification Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention discloses a sludge self-circulation dispersed sewage treatment device applicable to sewage reuse and a method of the device, and belongs to the technical field of sewage treatment. The sludge self-circulation dispersed sewage treatment device comprises an integrated reactor, wherein the integrated reactor is internally divided into a sewage ascending area, a sewage descending area and a settling area; a first isolation plate is arranged between the sewage ascending area and the sewage descending area; and a second isolation plate is arranged between the sewage descending area and the settling area. Through time-delay aerobic reaction design, the sludge reduction is realized, and the requirements on water reuse of Urban Wastewater Reclamation and Reuse: Urban Sewage Quality (GB/T18920-2002) can be met through integrated unit effluent. The reaction pool is high in sludge concentration, needs no sludge backflow facility, low in effluent concentration, simple and convenient in operation in sewage treatment and diverse in function; the quality and quantity of water are high in change capability, the reactor is high in sludge concentration and high in volume load, module production can be carried out, and unattended operation in a sewage treatment station is realized.
Description
Technical field
The invention belongs to technical field of sewage, relate to a kind of waste disposal plant and utilize this device to carry out the method for sewage disposal, relate in particular to one and both can be used for cities and towns, villages and small towns sewage, also can be used for disperseing the treatment unit of villa, tourist district and lower concentration organic industrial sewage and utilize it to carry out the method for sewage disposal.
Background technology
Sewage mainly comprises sanitary sewage and trade effluent.According to the difference of population collection situation, the resident of China is divided into city (containing county town) resident and villages and small towns (containing organic town) resident, and the sewage that cities and towns and villages and small towns produce is normally defined the municipal effluent of concentrating discharge and the villages and small towns sewage that disperses discharge.Along with the fast development of China's economy, municipal effluent generation constantly increases, and the quality of water environment in city sharply declines, and cities at different levels all face severe water surrounding pressure.For improving city resident's quality of water environment, government has dropped in recent years a large amount of funds and has built concentrated municipal sewage plant, by construction for many years, city domestic sewage and big yield trade effluent are effectively collected and are processed, and municipal sewage plant and the Industrial Wastewater Treatment station of comparatively perfect all built at China big and medium-sized cities and county town mostly at present.Be limited to Government's financial resources, to the construction of some decentralized wastewater treatment facilities, less input in country, aspect the processing of decentralized wastewater, still have very large shortcoming, be badly in need of economic, the easy decentralized wastewater treatment technology of application, processing the villages and small towns, villa district, tourist district and the township and village enterprises's sewage that relatively disperse.
In sewage, principal pollutant are organism and nitrogen and phosphorus pollutantses in water, at discharge water body or before recycling, need to remove it.Comparatively speaking, the its construction level of municipal sewage plant and most of city enterprise waste water is higher, the automatization level of sewage treatment unit is higher, in order to tackle the removal of organism and nitrogen and phosphorus pollutants, taked longer technical process, on process implementing, apply the technique of more complicated, even used the larger membrane separation technique of investment.The level of management that are limited to weak economic base and fall behind, the processing of the decentralized wastewater take villages and small towns sewage as representative, can not indiscriminately imitate treatment technology and the technique of municipal effluent, need the technology of that the actual conditionses such as application and villages and small towns social-economic development status, level of management, sewage water quantity and quality feature, terrain adapt, efficient low-consume, economic and practical type treatment process.
For reducing investment outlay, when design decentralized wastewater treatment process, need to consider to reduce as far as possible sewage or mud lifting, reduce excess sludge discharge, reduce special spoil disposal facility.For reducing the operational and administrative expenses of sewage works, when design decentralized wastewater, consider integrated mentality of designing as far as possible.For ensureing the stable of operating performance, the water quality and quantity of as far as possible the considering decentralized wastewater large feature that fluctuates.
Summary of the invention
The invention provides a kind of water quality, the water yield fluctuate treatment unit and method thereof of large villages and small towns and decentralized wastewater of being applicable to, by the design of integrated sewage treating apparatus, ensured the object of processing water outlet and can meet sewage reuse.
The object of the invention is to be achieved through the following technical solutions:
Technical scheme one:
A kind of mud self-circulation decentralized sewage treatment device that is applicable to reusing sewage, comprise integrated reactor, the top of the left side wall of integrated reactor is connected with water inlet pipe, the top of right side wall is provided with effluent weir and rising pipe, effluent weir is connected with rising pipe, the inside of integrated reactor is divided into mud rising area, mud decline district and settling region from left to right, between mud rising area and mud decline district, be provided with the first division plate, between mud decline district and settling region, be provided with the second division plate; Wherein: the bottom of described mud rising area is provided with aeration head or aeration tube, and aeration head or aeration tube are connected with blower tube; In described settling region, be provided with the first precipitation plate and the second precipitation plate, the first precipitation plate is connected with the bottom of the second division plate and forms the first precipitation angle, the second precipitation plate is positioned at the top of the first precipitation plate and is fixed on the right side inwall of integrated reactor, forms the second precipitation angle between the right side inwall of the integrated reactor of the second precipitation plate and the side of being located thereon.
Technical scheme two:
< < urban sewage reutilization: it is organism and ammonia nitrogen that city miscellaneous water water quality > > (GB/T 18920-2002) mainly removes pollutent, utilize above-mentioned mud self-circulating device to dispose of sewage and reach the method for reusing sewage object processing, specifically comprise the steps:
(1) integrated reactor inside is full of to muddy water mixed solution;
(2) decentralized wastewater enters mud rising area through water inlet pipe from integrated reactor top and mixes with muddy water mixed solution;
(3) in mud rising area, in water inlet, after air is overflowed from aeration head or aeration tube, drive muddy water mixed solution rises, sewage and mud are circulated in mud rising area and mud decline district around the first division plate, muddy water mixed solution in mud rising area and mud decline district is fully reaction under aerobic environment, completes the removal of organic pollutant and the oxidation of ammonia nitrogen;
(4) under the promotion of water inlet current, muddy water mixed solution upwards flows from the space of bottom, settling region, under the effect of gravity, mud returns to mud decline district by the first precipitation plate and the second precipitation plate respectively, reenter saprobia reaction process, sewage after precipitating sludge is clarified gradually in upwards mobile process, and water outlet flow to rising pipe through effluent weir, after decentralized wastewater water outlet is sterile-processed, can meet reuse water requirement.
The present invention adopts mud self-circulation time delay aerobic sludge decrement method, for effluent reuse, by the design of time delay aerobic reaction, realize mud decrement, integrated unit water outlet can meet < < urban sewage reutilization: the reuse water requirement of city miscellaneous water water quality > > (GB/T 18920-2002).
Tool of the present invention has the following advantages:
(1) in mud-water separation link, utilize double tilted plate to intersect the thought of reinforcement sludge sedimentation, replaced the thought of traditional gravitational settling;
(2) in sludge reflux link, utilize the theory of mud self-circulation, replaced the sludge reflux theory of traditional life sewage treatment unit, saved sludge reflux facility;
(3) in biological respinse link, utilize the theory of bio-carrier self-circulation, improved the biological concentration of biological respinse unit, in biological reaction tank, synchronously realize ammonia nitrogen and organic removal;
(4) going out clarification of water design link and utilized the thought of sludge absorption layer, when reusing sewage, saved sewage water filtration facility.
(5) biological reaction tank sludge concentration is high, low without sludge reflux facility, delivery turbidity, moves easy, diverse in function and can realize unmanned while disposing of sewage;
(6) anti-water quality and quantity changing capability is strong, reactor sludge concentration is high and volume load is high, can modularization produce, and the theory of integrated design and mud self-circulation can make sewage works realize unmanned.
Accompanying drawing explanation
Fig. 1 is the structural representation that is applicable to the mud self-circulation decentralized sewage treatment device of reusing sewage.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is further described; but do not limit to so; every technical solution of the present invention is modified or is equal to replacement, and not departing from the spirit and scope of technical solution of the present invention, all should be encompassed in protection scope of the present invention.
As shown in Figure 1, the mud self-circulation decentralized sewage treatment device that is applicable to reusing sewage of present embodiment comprises integrated reactor 1, the top of the left side wall of integrated reactor 1 is connected with water inlet pipe 2, the top of right side wall is provided with effluent weir 15 and rising pipe 16, effluent weir 15 is connected with rising pipe 16, the inside of integrated reactor 1 is divided into mud rising area 4, mud decline district 5 and settling region 9 from left to right, between mud rising area 4 and mud decline district 5, be provided with the first division plate 3, between mud decline district 5 and settling region 9, be provided with the second division plate 10; Wherein: the bottom of described mud rising area 4 is provided with aeration head or aeration tube 7, aeration head or aeration tube 7 are connected with blower tube 6; In described settling region 9, be provided with the first precipitation plate 11 and the second precipitation plate 12, the first precipitation plate 11 is connected with the bottom of the second division plate 10 and forms the first precipitation angle 13, the second precipitation plate 12 is positioned at the top of the first precipitation plate 11 and is fixed on the right side inwall of integrated reactor 1, forms the second precipitation angle 14 between the right side inwall of the integrated reactor 1 of the second precipitation plate 12 and the side of being located thereon.
Integrated reactor 1 is full of muddy water mixed solution when operation.Decentralized wastewater enters with the muddy water mixed solution reactor and mixes from the top of integrated reactor 1 through water inlet pipe 2, and the first division plate 3 is divided into mud rising area 4 and mud decline district 5 by bio-reactor.Mud rises and mud declines realizes by the one-sided air that passes into, blower tube 6 connects aeration head or aeration tube 7, owing to just in the reaction zone, left side (mud rising area 4) of the first division plate 3, aeration being set, air drives mixed solution to rise after overflowing from aeration head (pipe) 7, the right side that muddy water mixed solution forms mud rising area 4, the first division plates 3 from the left side compression integral rising of the first division plate 3 becomes mud decline district 5.For improving the concentration of microorganism in mud rising area 4 and mud decline district 5, can add in mud rising area carrier 8, under the circulation of muddy water mixed solution drives, carrier 8 can circulate around the first division plate 3 with sewage and mud.Muddy water mixed solution in mud rising area 4 and mud decline district 5 is fully reaction under aerobic environment, completes the removal of organic pollutant and the oxidation of ammonia nitrogen, and organism becomes carbonic acid gas and water by aerobic reaction process, and ammonia nitrogen is oxidized to nitric nitrogen.Under the promotion of water inlet current, muddy water mixed solution enters settling region 9.Muddy water mixed solution upwards flows from the space of 9 bottoms, settling region, under the effect of gravity, mud returns to biological respinse mud decline district 5 by the first precipitation plate 11 and the second precipitation plate 12 respectively, reenter saprobia reaction process, sewage after precipitating sludge is clarified gradually in upwards mobile process, water outlet flow to rising pipe 16 through effluent weir 15, after water outlet is sterile-processed, can meet < < urban sewage reutilization: the reuse water requirement of city miscellaneous water water quality > > (GB/T 18920-2002).
Organism in sewage is converted to carbonic acid gas and water by the microorganism in muddy water mixed solution in mud rising area 4 and mud decline district 5, has also bred some newborn microorganisms simultaneously.Consider that the general water yield of decentralized wastewater is less, do not wish to arrange separately sludge treatment unit, for ensure this technique can be MIN the mud of discharge propagation, when engineering design, extend the hydraulic detention time in mud rising area 4 and mud decline district 5, make the aerobic extended aeration state of reaction treatment of bio-reaction zone.
When engineering is applied, the plane (cross section) of integrated reactor 1 can be square, circle or rectangle.The material of integrated reactor 1 can be the materials such as steel, glass reinforced plastic, synthetic glass, PP.
When engineering is applied, in the mud rising area 4 of integrated reactor 1 and mud decline district 5, also can not add bio-carrier, under the promotion of one-sided aeration, muddy water mixed solution also can circulate around the first division plate 3, forms mud rising area 4 and mud decline district 5.
when engineering is applied, for preventing that mud from, in the first settlement plate 11 places depositions, also can arrange sludge lifting means herein, by the sludge lifting at this place to mud rising area 4 or mud decline district 5.
when engineering is applied, for forming sludge absorption floor in 9 bottoms, sludge settling district, also can in the middle of effluent weir 15 and the second sedimentation angle 14, outside sludge lifting pipe 17 be set, sludge lifting pipe 17 is connected with sludge pump, sludge lifting, to mud rising area 4 or mud decline district 5, just can be formed to sludge absorption layer like this in the middle of 9 bottoms, settling region and riser tube 17.The upflow velocity of sludge absorption layer is controlled at 0.6-1.6m/h.
The first division plate 3 is 20-30cm apart from the distance of integrated reactor 1 bottom, and the angle design at the first precipitation angle 13 and the second precipitation angle 14 is 120-150 degree.
the capacity of outlet water of effluent weir 15 is less than 2L/m.s.
The total hrt of settling region 9 is not less than 5 hours.
When decentralized wastewater water outlet is used mixedly, do not consider independent sludge treatment facility, sewage is designed to be no less than 20h at the total hrt in mud rising area 4 and mud decline district 5.
When decentralized wastewater water outlet is used mixedly, consider independent sludge treatment facility, the reaction treatment of bio-reaction zone is aerobic not in extended aeration state, sewage in mud rising area 4 or the total hrt in mud decline district 5 be no less than 6 hours, should be designed to 6-10 hour.Can every day sewage at mud rising area 4 and mud decline district 5 spoil disposals to the sludge concentration and dewatering facility setting up, every day, spoil disposal was not higher than 1/10 of mud rising area 4 and mud decline district 5 cumulative volumes.
while adding carrier 8, carrier 8 dosages are the 20-40% of mud rising area 4 volumes, add carrier 8 for suspending carrier.
The volume ratio in mud rising area 4 and mud decline district 5 is 2-3:1.
Claims (7)
1. one kind is applicable to the mud self-circulation decentralized sewage treatment device of reusing sewage, it is characterized in that described mud self-circulation decentralized sewage treatment device comprises integrated reactor (1), the top of the left side wall of integrated reactor (1) is connected with water inlet pipe (2), the top of right side wall is provided with effluent weir (15) and rising pipe (16), effluent weir (15) is connected with rising pipe (16), the inside of integrated reactor (1) is divided into mud rising area (4) from left to right, mud decline district (5) and settling region (9), between mud rising area (4) and mud decline district (5), be provided with the first division plate (3), between mud decline district (5) and settling region (9), be provided with the second division plate (10), wherein: the bottom of described mud rising area (4) is provided with aeration head or aeration tube (7), and aeration head or aeration tube (7) are connected with blower tube (6), in described settling region (9), be provided with the first precipitation plate (11) and the second precipitation plate (12), the first precipitation plate (11) is connected with the bottom of the second division plate (10) and forms the first precipitation angle (13), the second precipitation plate (12) is positioned at the top of the first precipitation plate (11) and is fixed on the right side inwall of integrated reactor (1), between the right side inwall of the integrated reactor (1) of the second precipitation plate (12) and the side of being located thereon, form the second precipitation angle (14), the angle at described the first precipitation angle (13) and the second precipitation angle (14) is 120-150 degree.
2. the mud self-circulation decentralized sewage treatment device that is applicable to reusing sewage according to claim 1, the cross section that it is characterized in that described integrated reactor (1) is square or circular; Material is steel, glass reinforced plastic, synthetic glass or PP material.
3. the mud self-circulation decentralized sewage treatment device that is applicable to reusing sewage according to claim 1, is characterized in that, between described effluent weir (15) and the second precipitation angle (14), outside sludge lifting pipe (17) is set.
4. the mud self-circulation decentralized sewage treatment device that is applicable to reusing sewage according to claim 1, is characterized in that described the first division plate (3) is 20-30cm apart from the distance of integrated reactor (1) bottom.
5. a method of utilizing the mud self-circulation decentralized sewage treatment device that is applicable to reusing sewage described in the arbitrary right of claim 1-4 to carry out sewage disposal, is characterized in that described method comprises the steps:
(1) integrated reactor (1) inside is full of to muddy water mixed solution;
(2) decentralized wastewater enters mud rising area (4) through water inlet pipe (2) from integrated reactor (1) top and mixes with muddy water mixed solution;
(3) in mud rising area (4), in water inlet, after air is overflowed from aeration head or aeration tube (7), drive muddy water mixed solution rises, sewage and mud are circulated in mud rising area (4) and mud decline district (5) around the first division plate (3), muddy water mixed solution in mud rising area (4) and mud decline district (5) is fully reaction under aerobic environment, completes the removal of organic pollutant and the oxidation of ammonia nitrogen;
(4) under the promotion of water inlet current, upwards flow in the space of muddy water mixed solution (9) bottom from settling region, under the effect of gravity, mud returns to mud decline district (5) by the first precipitation plate (11) and the second precipitation plate (12) respectively, reenter saprobia reaction process, sewage after precipitating sludge is clarified gradually in upwards mobile process, and water outlet flow to rising pipe (16) through effluent weir (15), after decentralized wastewater water outlet is sterile-processed, can meet reuse water requirement.
6. utilization according to claim 5 is applicable to the method that the mud self-circulation decentralized sewage treatment device of reusing sewage carries out sewage disposal, it is characterized in that the concentration in order to improve microorganism in mud rising area (4) and mud decline district (5), in mud rising area (4), add carrier (8), under the circulation of muddy water mixed solution drives, carrier (8) circulates around the first division plate (3) with sewage and mud; Described carrier (8) is suspending carrier, and dosage is the 20-40% of mud rising area (4) volume.
7. utilization according to claim 5 is applicable to the method that the mud self-circulation decentralized sewage treatment device of reusing sewage carries out sewage disposal, it is characterized in that the capacity of outlet water of described effluent weir (15) is less than 2L/m.s; The total hrt of settling region (9) is not less than 5 hours.
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| CN105936543A (en) * | 2016-06-24 | 2016-09-14 | 江苏贞环保科技有限公司 | Novel equipment for processing sewage of villages and towns |
| CN108128986A (en) * | 2018-01-29 | 2018-06-08 | 北京桑德环境工程有限公司 | Integrated multistage AO decentralized sewage treatment devices and method |
| CN112919610B (en) * | 2020-09-29 | 2022-10-14 | 金风环保有限公司 | Fluidized bed reactor and catalyst unit for catalytic oxidation |
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| CN203200074U (en) * | 2013-05-03 | 2013-09-18 | 哈尔滨工业大学 | Sludge self-circulation dispersion sewage treatment device applicable to sewage reuse and direct discharge water body |
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Effective date of registration: 20190111 Address after: 276000 Mengyubu Community, Jiuqu Street, Hedong District, Linyi City, Shandong Province Patentee after: SHANDONG XINHAI SURFACE TEC Co.,Ltd. Address before: 150000 No. 92, West Da Zhi street, Nangang District, Harbin, Heilongjiang. Patentee before: Harbin Institute of Technology |
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Denomination of invention: The invention relates to a sludge self circulation dispersion sewage treatment device suitable for sewage reuse and a method thereof Effective date of registration: 20210916 Granted publication date: 20140430 Pledgee: Shandong Linyi Hedong Rural Commercial Bank Co.,Ltd. Pledgor: Shandong Lulan Environmental Protection Technology Co.,Ltd. Registration number: Y2021980009456 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
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Date of cancellation: 20220908 Granted publication date: 20140430 Pledgee: Shandong Linyi Hedong Rural Commercial Bank Co.,Ltd. Pledgor: Shandong Lulan Environmental Protection Technology Co.,Ltd. Registration number: Y2021980009456 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A sludge self-circulation dispersed sewage treatment device suitable for sewage reuse and method thereof Effective date of registration: 20220909 Granted publication date: 20140430 Pledgee: Shandong Linyi Hedong Rural Commercial Bank Co.,Ltd. Pledgor: Shandong Lulan Environmental Protection Technology Co.,Ltd. Registration number: Y2022980014889 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230906 Granted publication date: 20140430 Pledgee: Shandong Linyi Hedong Rural Commercial Bank Co.,Ltd. Pledgor: Shandong Lulan Environmental Protection Technology Co.,Ltd. Registration number: Y2022980014889 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A sludge self circulation and dispersion sewage treatment device and method suitable for sewage reuse Effective date of registration: 20230906 Granted publication date: 20140430 Pledgee: Shandong Linyi Hedong Rural Commercial Bank Co.,Ltd. Pledgor: Shandong Lulan Environmental Protection Technology Co.,Ltd. Registration number: Y2023980055670 |