CN106186530B - A kind of high-efficient treatment method of sanitary sewage - Google Patents
A kind of high-efficient treatment method of sanitary sewage Download PDFInfo
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- CN106186530B CN106186530B CN201610634161.5A CN201610634161A CN106186530B CN 106186530 B CN106186530 B CN 106186530B CN 201610634161 A CN201610634161 A CN 201610634161A CN 106186530 B CN106186530 B CN 106186530B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/008—Sludge treatment by fixation or solidification
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physical Water Treatments (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses a kind of high-efficient treatment methods of sanitary sewage, the following steps are included: sanitary sewage is added in oxidization and sedimentation basin first, hydrogenperoxide steam generator is added, oxidation precipitation, obtain supernatant and base sludge, base sludge is drained into sludge-tank, then supernatant is pumped into anaerobic-aerobic reactor, continue anaerobic degradation precipitating, sludge after precipitating is drained into sludge-tank, supernatant is pumped into settling tank, flocculant is added to continue to precipitate, obtained sludge is drained into sludge-tank, supernatant is pumped into final deposition pool, it carries out continuing to precipitate, supernatant discharge, base sludge is drained into sludge-tank, photochemical catalyst finally is added in the sludge in sludge-tank, extractant etc. carries out microwave treatment.This method can effectively remove heavy metal and organic pollutant in waste water, high-efficient, at low cost.
Description
Technical field:
The present invention relates to field of waste water treatment, are specifically related to a kind of high-efficient treatment method of sanitary sewage.
Background technique:
For a long time, people think that always water is the resource of " inexhaustible, nexhaustible ".But since nearly half a century
It turns out that as utilization scope of the mankind to water resource constantly expands, intensity is continuously increased, to the demand of water in many states
Family and area are well beyond the output of water resource, and water resources crisis signals for help repeatedly, or even in those water resources than more rich
Countries and regions, due to exploitation, using water while also polluted water resource, also occur water quality type water resource shortage ask
Topic.China is the most country of world population, with the abruptly increase of urban population, rural urbanization and living standards of the people
It improves, water requirement and gross water requirement are continuously increased per capita, and municipal sewage total release also accordingly gradually increases therewith.This point,
It is particularly evident since the nineties.China's municipal wastewater discharge amount in 1997 is 18,900,000,000 m3, wherein COD content is 68,400,000,000 tons.
1999, China's city domestic sewage pollutional load was more than industrial wastewater pollution load, the weight of China's water pollution control for the first time
The point control based on the industrial point source, is gradually transferred to the control based on city domestic sewage.
Currently used domestic sewage processing method mainly has anaerobic treatment process, biofilm treatment process, joint life
Object processing technique etc., although it can be very good to remove the harmful substance in sanitary sewage, remaining sludge is unstable,
The content of organic matter is high, it is difficult to degrade, can cause secondary pollution to environment.
Summary of the invention:
The object of the present invention is to provide a kind of high-efficient treatment method of sanitary sewage, it is dirty that this method can effectively remove life
Heavy metal and organic pollutant in water, it is without secondary pollution, it is high-efficient, it is at low cost.
To achieve the above object, the invention adopts the following technical scheme:
A kind of high-efficient treatment method of sanitary sewage, comprising the following steps:
(1) sanitary sewage is pumped into oxidization and sedimentation basin, hydrogenperoxide steam generator is added, after mixing evenly, stand reaction
Then flocculant is added in 1-2h into the sanitary sewage after oxidation processes, after mixing evenly, supernatant is pumped by standing sedimentation
Into anaerobic-aerobic reactor, base sludge is drained into sludge-tank；
(2) anaerobic-aerobic reactor is called in into anaerobic state, and the biological microcarrier with adsorption function is added, stood
10-20min is handled, air is then passed through into anaerobic-aerobic reactor, is stirred simultaneously, so processing 10-30min, then will
Sanitary sewage is pumped into settling tank, staticly settles 30-50min after flocculant is added, supernatant enters in coagulating basin, and coagulation is anti-
Should after flow automatically into final deposition pool, base sludge is drained into sludge-tank；
(3) supernatant after precipitating in final deposition pool is discharged, base sludge is drained into sludge-tank；
(4) sequentially added in the sludge in Xiang Shangshu sludge-tank photochemical catalyst, extractant, exciting agent, alkaline curing agent and
Heavy metal curing agent after being uniformly mixed, is processed into the particle that diameter is 10-30cm；
(5) mud granule made from step (4) is put into progress microwave and photo catalysis processing in micro-wave oven, and be recycled
The exhaust gas generated in journey.
As a preferred embodiment of the above technical solution, in step (1), the mass concentration of the hydrogenperoxide steam generator is 20-40%.
As a preferred embodiment of the above technical solution, step (1), in (2), the flocculant is villaumite, molysite, appointing in magnesium salts
It anticipates one kind.
As a preferred embodiment of the above technical solution, in step (2), the biology microcarrier is diatomite, clay, attapulgite
One of.
As a preferred embodiment of the above technical solution, in step (4), the photochemical catalyst is nano-titanium dioxide, nano oxidized
The mixture of zinc, the two mass ratio are 1:(0.5-0.8).
As a preferred embodiment of the above technical solution, in step (4), the extractant is dimethyl carbonate, 1,2-PD, second
One of acetoacetic ester or a variety of mixing.
As a preferred embodiment of the above technical solution, in step (4), the exciting agent be magnesium chloride, sodium sulphate mixture, two
Person's mass ratio is (0.3-0.5): 1.
As a preferred embodiment of the above technical solution, in step (4), the alkaline curing agent is waterglass.
As a preferred embodiment of the above technical solution, in step (4), the microwave temperature range is 100-450 DEG C, power bracket
For 100-7000W.
As a preferred embodiment of the above technical solution, in step (4), the sludge, photochemical catalyst, extractant, exciting agent, alkalinity
Curing agent and the mass ratio of heavy metal curing agent are 100:(0.15-0.8): (1-2): (0.05-0.1): (0.08-0.12):
(0.005-0.1)。
The invention has the following advantages:
Photochemical catalyst, exciting agent, extractant etc. is added in the present invention in the sludge after wastewater treatment, and under certain condition
Carry out microwave treatment, effectively remove active organic matter, inertia organic matter, the moisture etc. in sludge, the addition of waterglass so that
Remaining organic matter, heavy metal, cementitious material bonding get up, and obtain high-intensitive Microwave Emulsifier-Free Polymerization object in sludge；
The treatment process is at low cost, high-efficient, easy to operate, without secondary pollution to environment, is suitable for large-scale use.
Specific embodiment:
In order to better understand the present invention, below by embodiment, the present invention is further described, and embodiment is served only for solving
The present invention is released, any restriction will not be constituted to the present invention.
Embodiment 1
A kind of high-efficient treatment method of sanitary sewage, comprising the following steps:
(1) sanitary sewage is pumped into oxidization and sedimentation basin, the hydrogenperoxide steam generator that mass concentration is 20% is added, stirring
After uniformly, reaction 1h is stood, flocculant is then added into the sanitary sewage after oxidation processes, after mixing evenly, standing sedimentation,
Supernatant is pumped into anaerobic-aerobic reactor, base sludge is drained into sludge-tank；
(2) anaerobic-aerobic reactor is called in into anaerobic state, and diatomite is added, stewing process 10min, then to detesting
It is passed through air in oxygen aerobic reactor, stirs simultaneously, so processing 10min, then sanitary sewage is pumped into settling tank, is added
30min is staticly settled after entering flocculant, supernatant enters in coagulating basin, and gravity flow enters final deposition pool, base sludge after coagulating
It is drained into sludge-tank；
(3) supernatant after precipitating in final deposition pool is discharged, base sludge is drained into sludge-tank；
(4) sequentially added in the sludge in Xiang Shangshu sludge-tank photochemical catalyst, extractant, exciting agent, alkaline curing agent and
Heavy metal curing agent after being uniformly mixed, is processed into the particle that diameter is 10-30cm, wherein sludge, photochemical catalyst, extraction
Agent, exciting agent, alkaline curing agent and heavy metal curing agent mass ratio be 100:0.15:1:0.05:0.08:0.005；
(5) mud granule made from step (4) is put into micro-wave oven at 100-450 DEG C, power bracket 100-7000W
Under, carry out the exhaust gas that microwave and photo catalysis handles 2min, and generates during being recycled.
Embodiment 2
A kind of high-efficient treatment method of sanitary sewage, comprising the following steps:
(1) sanitary sewage is pumped into oxidization and sedimentation basin, the hydrogenperoxide steam generator that mass concentration is 40% is added, stirring
After uniformly, reaction 2h is stood, flocculant is then added into the sanitary sewage after oxidation processes, after mixing evenly, standing sedimentation,
Supernatant is pumped into anaerobic-aerobic reactor, base sludge is drained into sludge-tank；
(2) anaerobic-aerobic reactor is called in into anaerobic state, and clay is added, stewing process 20min, then to anaerobism
It is passed through air in aerobic reactor, stirs simultaneously, so processing 30min, then sanitary sewage is pumped into settling tank, is added
50min is staticly settled after flocculant, supernatant enters in coagulating basin, and gravity flow enters final deposition pool, base sludge row after coagulating
Enter into sludge-tank；
(3) supernatant after precipitating in final deposition pool is discharged, base sludge is drained into sludge-tank；
(4) sequentially added in the sludge in Xiang Shangshu sludge-tank photochemical catalyst, extractant, exciting agent, alkaline curing agent and
Heavy metal curing agent after being uniformly mixed, is processed into the particle that diameter is 10-30cm, wherein sludge, photochemical catalyst, extraction
Agent, exciting agent, alkaline curing agent and heavy metal curing agent mass ratio be 100:0.8:2:0.1:0.12:0.1；
(5) mud granule made from step (4) is put into micro-wave oven at 100-450 DEG C, power bracket 100-7000W
Under, carry out the exhaust gas that microwave and photo catalysis handles 10min, and generates during being recycled.
Embodiment 3
A kind of high-efficient treatment method of sanitary sewage, comprising the following steps:
(1) sanitary sewage is pumped into oxidization and sedimentation basin, the hydrogenperoxide steam generator that mass concentration is 25% is added, stirring
After uniformly, reaction 1.2h is stood, flocculant is then added into the sanitary sewage after oxidation processes, after mixing evenly, it is heavy to stand
Drop, supernatant is pumped into anaerobic-aerobic reactor, base sludge is drained into sludge-tank；
(2) anaerobic-aerobic reactor is called in into anaerobic state, and attapulgite is added, stewing process 15min, then to
It is passed through air in anaerobic-aerobic reactor, stirs simultaneously, so processing 15min, then sanitary sewage is pumped into settling tank,
35min is staticly settled after flocculant is added, supernatant enters in coagulating basin, and gravity flow enters final deposition pool after coagulating, and bottom is dirty
Mud is drained into sludge-tank；
(3) supernatant after precipitating in final deposition pool is discharged, base sludge is drained into sludge-tank；
(4) sequentially added in the sludge in Xiang Shangshu sludge-tank photochemical catalyst, extractant, exciting agent, alkaline curing agent and
Heavy metal curing agent after being uniformly mixed, is processed into the particle that diameter is 10-30cm, wherein sludge, photochemical catalyst, extraction
Agent, exciting agent, alkaline curing agent and heavy metal curing agent mass ratio be 100:0.2:1.2:0.06:0.09:0.01；
(5) mud granule made from step (4) is put into micro-wave oven at 100-450 DEG C, power bracket 100-7000W
Under, carry out the exhaust gas that microwave and photo catalysis handles 4min, and generates during being recycled.
Embodiment 4
A kind of high-efficient treatment method of sanitary sewage, comprising the following steps:
(1) sanitary sewage is pumped into oxidization and sedimentation basin, the hydrogenperoxide steam generator that mass concentration is 30% is added, stirring
After uniformly, reaction 1.4h is stood, flocculant is then added into the sanitary sewage after oxidation processes, after mixing evenly, it is heavy to stand
Drop, supernatant is pumped into anaerobic-aerobic reactor, base sludge is drained into sludge-tank；
(2) anaerobic-aerobic reactor is called in into anaerobic state, and diatomite is added, stewing process 15min, then to detesting
It is passed through air in oxygen aerobic reactor, stirs simultaneously, so processing 20min, then sanitary sewage is pumped into settling tank, is added
40min is staticly settled after entering flocculant, supernatant enters in coagulating basin, and gravity flow enters final deposition pool, base sludge after coagulating
It is drained into sludge-tank；
(3) supernatant after precipitating in final deposition pool is discharged, base sludge is drained into sludge-tank；
(4) sequentially added in the sludge in Xiang Shangshu sludge-tank photochemical catalyst, extractant, exciting agent, alkaline curing agent and
Heavy metal curing agent after being uniformly mixed, is processed into the particle that diameter is 10-30cm, wherein sludge, photochemical catalyst, extraction
Agent, exciting agent, alkaline curing agent and heavy metal curing agent mass ratio be 100:0.4:1.4:0.07:0.1:0.03；
(5) mud granule made from step (4) is put into micro-wave oven at 100-450 DEG C, power bracket 100-7000W
Under, carry out the exhaust gas that microwave and photo catalysis handles 6min, and generates during being recycled.
Embodiment 5
A kind of high-efficient treatment method of sanitary sewage, comprising the following steps:
(1) sanitary sewage is pumped into oxidization and sedimentation basin, the hydrogenperoxide steam generator that mass concentration is 30% is added, stirring
After uniformly, reaction 1.6h is stood, flocculant is then added into the sanitary sewage after oxidation processes, after mixing evenly, it is heavy to stand
Drop, supernatant is pumped into anaerobic-aerobic reactor, base sludge is drained into sludge-tank；
(2) anaerobic-aerobic reactor is called in into anaerobic state, and clay is added, stewing process 20min, then to anaerobism
It is passed through air in aerobic reactor, stirs simultaneously, so processing 15min, then sanitary sewage is pumped into settling tank, is added
45min is staticly settled after flocculant, supernatant enters in coagulating basin, and gravity flow enters final deposition pool, base sludge row after coagulating
Enter into sludge-tank；
(3) supernatant after precipitating in final deposition pool is discharged, base sludge is drained into sludge-tank；
(4) sequentially added in the sludge in Xiang Shangshu sludge-tank photochemical catalyst, extractant, exciting agent, alkaline curing agent and
Heavy metal curing agent after being uniformly mixed, is processed into the particle that diameter is 10-30cm, wherein sludge, photochemical catalyst, extraction
Agent, exciting agent, alkaline curing agent and heavy metal curing agent mass ratio be 100:0.5:1.6:0.08:0.1:0.06；
(5) mud granule made from step (4) is put into micro-wave oven at 100-450 DEG C, power bracket 100-7000W
Under, carry out the exhaust gas that microwave and photo catalysis handles 8min, and generates during being recycled.
Embodiment 6
A kind of high-efficient treatment method of sanitary sewage, comprising the following steps:
(1) sanitary sewage is pumped into oxidization and sedimentation basin, the hydrogenperoxide steam generator that mass concentration is 35% is added, stirring
After uniformly, reaction 1.8h is stood, flocculant is then added into the sanitary sewage after oxidation processes, after mixing evenly, it is heavy to stand
Drop, supernatant is pumped into anaerobic-aerobic reactor, base sludge is drained into sludge-tank；
(2) anaerobic-aerobic reactor is called in into anaerobic state, and attapulgite is added, stewing process 15min, then to
It is passed through air in anaerobic-aerobic reactor, stirs simultaneously, so processing 25min, then sanitary sewage is pumped into settling tank,
45min is staticly settled after flocculant is added, supernatant enters in coagulating basin, and gravity flow enters final deposition pool after coagulating, and bottom is dirty
Mud is drained into sludge-tank；
(3) supernatant after precipitating in final deposition pool is discharged, base sludge is drained into sludge-tank；
(4) sequentially added in the sludge in Xiang Shangshu sludge-tank photochemical catalyst, extractant, exciting agent, alkaline curing agent and
Heavy metal curing agent after being uniformly mixed, is processed into the particle that diameter is 10-30cm, wherein sludge, photochemical catalyst, extraction
Agent, exciting agent, alkaline curing agent and heavy metal curing agent mass ratio be 100:0.75:1.8:0.09:0.11:0.09；
(5) mud granule made from step (4) is put into micro-wave oven at 100-450 DEG C, power bracket 100-7000W
Under, carry out the exhaust gas that microwave and photo catalysis handles 9min, and generates during being recycled.
Claims (9)
1. a kind of high-efficient treatment method of sanitary sewage, which comprises the following steps:
(1) sanitary sewage is pumped into oxidization and sedimentation basin, hydrogenperoxide steam generator is added, after mixing evenly, stand reaction 1-2h,
Then flocculant is added into the sanitary sewage after oxidation processes, after mixing evenly, supernatant is pumped into anaerobism by standing sedimentation
In aerobic reactor, base sludge is drained into sludge-tank；
(2) anaerobic-aerobic reactor is called in into anaerobic state, and the biological microcarrier with adsorption function, stewing process is added
Then 10-20min is passed through air into anaerobic-aerobic reactor, stirs simultaneously, so processing 10-30min, then will life
Sewage is pumped into settling tank, staticly settles 30-50min after flocculant is added, supernatant enters in coagulating basin, after coagulating
Gravity flow enters final deposition pool, and base sludge is drained into sludge-tank；
(3) supernatant after precipitating in final deposition pool is discharged, base sludge is drained into sludge-tank；
(4) photochemical catalyst, extractant, exciting agent, alkaline curing agent and a huge sum of money are sequentially added in the sludge in Xiang Shangshu sludge-tank
Belong to curing agent, after being uniformly mixed, is processed into the particle that diameter is 10-30cm；
(5) mud granule made from step (4) is put into progress microwave and photo catalysis processing in micro-wave oven, and during recovery processing
The exhaust gas of generation；
In step (4), the quality of the sludge, photochemical catalyst, extractant, exciting agent, alkaline curing agent and heavy metal curing agent
Than for 100:(0.15-0.8): (1-2): (0.05-0.1): (0.08-0.12): (0.005-0.1).
2. a kind of high-efficient treatment method of sanitary sewage as described in claim 1, it is characterised in that: in step (1), the mistake
The mass concentration of hydrogen peroxide solution is 20-40%.
3. a kind of high-efficient treatment method of sanitary sewage as described in claim 1, it is characterised in that: in step (1), (2), institute
Flocculant is stated as any one in villaumite, molysite, magnesium salts.
4. a kind of high-efficient treatment method of sanitary sewage as described in claim 1, it is characterised in that: in step (2), the life
Object microcarrier is one of diatomite, clay, attapulgite.
5. a kind of high-efficient treatment method of sanitary sewage as described in claim 1, it is characterised in that: in step (4), the light
Catalyst is the mixture of nano-titanium dioxide, nano zine oxide, and the two mass ratio is 1:(0.5-0.8).
6. a kind of high-efficient treatment method of sanitary sewage as described in claim 1, it is characterised in that: in step (4), the extraction
Taking agent is one of dimethyl carbonate, 1,2- propylene glycol, ethyl acetate or a variety of mixing.
7. a kind of high-efficient treatment method of sanitary sewage as described in claim 1, it is characterised in that: described to swash in step (4)
Hair agent is the mixture of magnesium chloride, sodium sulphate, and the two mass ratio is (0.3-0.5): 1.
8. a kind of high-efficient treatment method of sanitary sewage as described in claim 1, it is characterised in that: in step (4), the alkali
Property curing agent be waterglass.
9. a kind of high-efficient treatment method of sanitary sewage as described in claim 1, it is characterised in that: described micro- in step (4)
Wave temperature range is 100-450 DEG C, power bracket 100-7000W.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1603244A (en) * | 2004-10-26 | 2005-04-06 | 哈尔滨工业大学 | Preparation method of sludge adsorbent and method for intensified processing domestic sewage using the same |
| CN104261632A (en) * | 2014-10-16 | 2015-01-07 | 滁州友林科技发展有限公司 | Method for domestic sewage treatment |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1603244A (en) * | 2004-10-26 | 2005-04-06 | 哈尔滨工业大学 | Preparation method of sludge adsorbent and method for intensified processing domestic sewage using the same |
| CN104261632A (en) * | 2014-10-16 | 2015-01-07 | 滁州友林科技发展有限公司 | Method for domestic sewage treatment |
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Effective date of registration: 20190327 Address after: 650000 Dianchi Lake Resort, Kunming City, Yunnan Province, Block 10, B-1, Saigon Wharf, Dianchi Road Applicant after: Yunnan Tengxu Municipal Engineering Design Co., Ltd. Address before: 313000 No. 599, Shan right road, Yangjia Town, Huzhou economic and Technological Development Zone, Huzhou, Zhejiang Applicant before: Chen Yonglin |
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