CN106746192A - A kind of city domestic sewage processing method - Google Patents
A kind of city domestic sewage processing method Download PDFInfo
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- CN106746192A CN106746192A CN201611118928.5A CN201611118928A CN106746192A CN 106746192 A CN106746192 A CN 106746192A CN 201611118928 A CN201611118928 A CN 201611118928A CN 106746192 A CN106746192 A CN 106746192A
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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
-
- 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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- 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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
-
- 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
- C02F3/02—Aerobic processes
-
- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a kind of city domestic sewage processing method, the city domestic sewage processing method is comprised the following steps that：S1：The collection of sanitary sewage；S2：To be crushed in sewage transport to the reducing mechanism in the total pond of sewage in step S1 using sewage pump；S3：Dosing is precipitated；S4：Treatment of Sludge；S5：Microbial degradation；S6：Dosing is degraded；S7：Dosing again is precipitated；S8：Treatment of Sludge；S9：Disinfect；S10：Basicity is adjusted；S11：Discharge.The city domestic sewage processing method, reduces cost of sewage disposal, quickly that municipal sewage treatment is clean, rear discharge up to standard, recycled by the water resource that will be remained in settled sludge, efficiently using water resource, aoxidized twice, settle twice, good purification, treatment effeciency is high.
Description
Technical field
The present invention relates to sewage water treatment method technical field, specially a kind of city domestic sewage processing method.
Background technology
Sewage handling problem is increasingly subject to the great attention of society.With the development of the process and industrial society of urbanization,
One side water consumption is continuously increased, and water resource is increasingly in short supply, and on the other hand, quantity of wastewater effluent is increasing, environmental pollution day
It is beneficial serious.Therefore, urban sewage treatment system is to solve water resource deficiency and the serious key of environmental pollution.Municipal sewage is main
Come from the sanitary sewage and appropriate industrial production wastewater of the discharges such as family, office, business, urban public utilities, waste water water
Amount is big and there is obvious daily cycle property and seasonal periodicity change.Major pollutants in sewage have vegetable and animals oils, suspend
Compound, microorganism of thing, carbohydrate, protein, surfactant, nitrogen and phosphorus etc., these organic pollutions are general all
It is easier biodegradation.For a long time, the two stage biological treatment of city domestic sewage uses activated sludge process, and it is current
A kind of most widely used two stage biological handling process in countries in the world, it is high with disposal ability, the advantages of effluent quality is good.But it is general
High all over there is capital cost, running cost, energy consumption is big, manages more complicated, it is difficult to meet people's demand.
The content of the invention
It is an object of the invention to provide a kind of city domestic sewage processing method, to solve to be proposed in above-mentioned background technology
Problem.
To achieve the above object, the present invention provides following technical scheme：A kind of city domestic sewage processing method, the city
Domestic sewage processing method is comprised the following steps that：
S1：, be delivered to city domestic sewage at sewage by each blow down branch by the collection of sanitary sewage, is unified
Treatment, and collected by the total pond of sewage；
S2：To be crushed in sewage transport to the reducing mechanism in the total pond of sewage in step S1 using sewage pump, during crushing
Between be 10-15 minutes；
S3：Dosing is precipitated, and reducing mechanism bottom in step s 2 sets settling tank, makes the city after crushing in step S2
Sewage enters in settling tank, and by adding the method Accelerated subsidence of flocculant, the sedimentation time is 10-15 minutes；
S4：Treatment of Sludge, the sludge that settles down is processed after step S3 is added into flocculant, by sludge pump by dirt
Mud is transported to sludge recovery pond；
S5：Microbial degradation, by step S3 at the middle and upper levels sewage transport to biodegradable pond, by the side of microbial degradation
Method, by the eutrophy composition oxidation Decomposition in sewage；
S6：Dosing is degraded, and to oxidant is added in the biodegradable pond in step S5, oxidative degradation is promoted by oxidant
Reaction, improves reaction efficiency, and oxidant is polyacrylamide, calcium oxide and calcium aluminate powder mixture, and the polyacrylamide
Amine 100-120 parts, calcium oxide 150-170 parts, calcium aluminate powder 80-100 parts；
S7：Dosing precipitation, flocculant is added in the sewage after being degraded to dosing in step S6 again, makes the product of oxidation reaction
Rapid sedimentation, the sedimentation time is 10-15 minutes；
S8：Treatment of Sludge, adds the sediment settled down after flocculant to be processed step S7, will by sludge pump
Sludge is transported to sludge recovery pond；
S9：Disinfect, upper strata sewage transport to the sterilization pool in step S7 is carried out disinfection treatment；
S10：Acid-base value is adjusted, the method by adding oxalic acid, is stirred in addition, real-time detection, and pH value control is existed
6-9；
S11：Discharge.
Preferably, the total pond of sewage in the step S1 is the total pond of underground sewage, and sewage is provided with passage on total pond, and
And activated charcoal strainer is provided with passage.
Preferably, reducing mechanism is driven by electric rotating machine and crushes hammer and ceaselessly rotate in the step S2, so as to by city
Solid matter in city's sewage is crushed, and prevents from blocking pipeline, is easy to the purification of next step to degrade.
Preferably, the sewage flocculant for being added in the step S3 is industrial alum, and industrial alum is powdered.
Preferably, a point water plate is provided with the sludge recovery pond bottom in the step S4 and S8, by what is remained in sludge
Out, and be transported to these residual sewages in settling tank by sewage pump reuse by sewage water filtration.
Preferably, in the step S5, constantly to oxygen is passed through in biodegradable pond, microbiological oxidation efficiency is improved,
Degradation speed is improved, the time for being passed through oxygen is 10-15 minutes.
Preferably, the sewage flocculant for being added in the step S7 is industrial alum, and industrial alum is powdered.
Preferably, the step S9 disinfects middle use disinfection by chlorine, to chlorine is passed through in sterilization pool, is passed through chlorine
Time is 10-15 minutes, and sewage is carried out disinfection.
Compared with prior art, the beneficial effects of the invention are as follows：The city domestic sewage processing method, reduces sewage disposal
Cost, quickly that municipal sewage treatment is clean, rear discharge up to standard, is recycled by the water resource that will be remained in settled sludge,
Water resource efficiently is utilized, is aoxidized twice, settled twice, good purification, treatment effeciency is high.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with specific embodiment, to this
Invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not
For limiting the present invention.
Embodiment 1
A kind of city domestic sewage processing method, the city domestic sewage processing method is comprised the following steps that：
S1：, be delivered to city domestic sewage at sewage by each blow down branch by the collection of sanitary sewage, is unified
Treatment, and collected by the total pond of sewage；
S2：To be crushed in sewage transport to the reducing mechanism in the total pond of sewage in step S1 using sewage pump, during crushing
Between be 10-15 minutes；
S3：Dosing is precipitated, and reducing mechanism bottom in step s 2 sets settling tank, makes the city after crushing in step S2
Sewage enters in settling tank, and by adding the method Accelerated subsidence of flocculant, the sedimentation time is 10-15 minutes；
S4：Treatment of Sludge, the sludge that settles down is processed after step S3 is added into flocculant, by sludge pump by dirt
Mud is transported to sludge recovery pond；
S5：Microbial degradation, by step S3 at the middle and upper levels sewage transport to biodegradable pond, by the side of microbial degradation
Method, by the eutrophy composition oxidation Decomposition in sewage；
S6：Dosing is degraded, and to oxidant is added in the biodegradable pond in step S5, oxidative degradation is promoted by oxidant
Reaction, improves reaction efficiency, and oxidant is polyacrylamide, calcium oxide and calcium aluminate powder mixture, and the polyacrylamide
100 parts of amine, 150 parts of calcium oxide, 80 parts of calcium aluminate powder；
S7：Dosing precipitation, flocculant is added in the sewage after being degraded to dosing in step S6 again, makes the product of oxidation reaction
Rapid sedimentation, the sedimentation time is 10-15 minutes；
S8：Treatment of Sludge, adds the sediment settled down after flocculant to be processed step S7, will by sludge pump
Sludge is transported to sludge recovery pond；
S9：Disinfect, upper strata sewage transport to the sterilization pool in step S7 is carried out disinfection treatment；
S10：Acid-base value is adjusted, the method by adding oxalic acid, is stirred in addition, real-time detection, and pH value control is existed
6-9；
S11：Discharge.
The total pond of sewage in the step S1 is the total pond of underground sewage, and sewage is provided with passage on total pond, and ventilates
Activated charcoal strainer is provided with hole.
Reducing mechanism is driven to crush to hammer into shape by electric rotating machine and ceaselessly rotated in the step S2, so as to by municipal sewage
Solid matter crush, prevent block pipeline, be easy to the purification of next step to degrade.
The sewage flocculant added in the step S3 is industrial alum, and industrial alum is powdered.
A point water plate, the sewage water filtration that will be remained in sludge are provided with sludge recovery pond bottom in the step S4 and S8
Out, and these residual sewages are transported in settling tank by sewage pump and are reused.
In the step S5, constantly to oxygen is passed through in biodegradable pond, microbiological oxidation efficiency is improved, improve degraded
Speed, the time for being passed through oxygen is 10-15 minutes.
The sewage flocculant added in the step S7 is industrial alum, and industrial alum is powdered.
The step S9 disinfects middle use disinfection by chlorine, and to being passed through chlorine in sterilization pool, the time for being passed through chlorine is
10-15 minutes, sewage is carried out disinfection.
Embodiment 2
A kind of city domestic sewage processing method, the city domestic sewage processing method is comprised the following steps that：
S1：, be delivered to city domestic sewage at sewage by each blow down branch by the collection of sanitary sewage, is unified
Treatment, and collected by the total pond of sewage；
S2：To be crushed in sewage transport to the reducing mechanism in the total pond of sewage in step S1 using sewage pump, during crushing
Between be 10-15 minutes；
S3：Dosing is precipitated, and reducing mechanism bottom in step s 2 sets settling tank, makes the city after crushing in step S2
Sewage enters in settling tank, and by adding the method Accelerated subsidence of flocculant, the sedimentation time is 10-15 minutes；
S4：Treatment of Sludge, the sludge that settles down is processed after step S3 is added into flocculant, by sludge pump by dirt
Mud is transported to sludge recovery pond；
S5：Microbial degradation, by step S3 at the middle and upper levels sewage transport to biodegradable pond, by the side of microbial degradation
Method, by the eutrophy composition oxidation Decomposition in sewage；
S6：Dosing is degraded, and to oxidant is added in the biodegradable pond in step S5, oxidative degradation is promoted by oxidant
Reaction, improves reaction efficiency, and oxidant is polyacrylamide, calcium oxide and calcium aluminate powder mixture, and the polyacrylamide
110 parts of amine, 160 parts of calcium oxide, 90 parts of calcium aluminate powder；
S7：Dosing precipitation, flocculant is added in the sewage after being degraded to dosing in step S6 again, makes the product of oxidation reaction
Rapid sedimentation, the sedimentation time is 10-15 minutes；
S8：Treatment of Sludge, adds the sediment settled down after flocculant to be processed step S7, will by sludge pump
Sludge is transported to sludge recovery pond；
S9：Disinfect, upper strata sewage transport to the sterilization pool in step S7 is carried out disinfection treatment；
S10：Acid-base value is adjusted, the method by adding oxalic acid, is stirred in addition, real-time detection, and pH value control is existed
6-9；
S11：Discharge.
The total pond of sewage in the step S1 is the total pond of underground sewage, and sewage is provided with passage on total pond, and ventilates
Activated charcoal strainer is provided with hole.
Reducing mechanism is driven to crush to hammer into shape by electric rotating machine and ceaselessly rotated in the step S2, so as to by municipal sewage
Solid matter crush, prevent block pipeline, be easy to the purification of next step to degrade.
The sewage flocculant added in the step S3 is industrial alum, and industrial alum is powdered.
A point water plate, the sewage water filtration that will be remained in sludge are provided with sludge recovery pond bottom in the step S4 and S8
Out, and these residual sewages are transported in settling tank by sewage pump and are reused.
In the step S5, constantly to oxygen is passed through in biodegradable pond, microbiological oxidation efficiency is improved, improve degraded
Speed, the time for being passed through oxygen is 10-15 minutes.
The sewage flocculant added in the step S7 is industrial alum, and industrial alum is powdered.
The step S9 disinfects middle use disinfection by chlorine, and to being passed through chlorine in sterilization pool, the time for being passed through chlorine is
10-15 minutes, sewage is carried out disinfection.
Embodiment 3
A kind of city domestic sewage processing method, the city domestic sewage processing method is comprised the following steps that：
S1：, be delivered to city domestic sewage at sewage by each blow down branch by the collection of sanitary sewage, is unified
Treatment, and collected by the total pond of sewage；
S2：To be crushed in sewage transport to the reducing mechanism in the total pond of sewage in step S1 using sewage pump, during crushing
Between be 10-15 minutes；
S3：Dosing is precipitated, and reducing mechanism bottom in step s 2 sets settling tank, makes the city after crushing in step S2
Sewage enters in settling tank, and by adding the method Accelerated subsidence of flocculant, the sedimentation time is 10-15 minutes；
S4：Treatment of Sludge, the sludge that settles down is processed after step S3 is added into flocculant, by sludge pump by dirt
Mud is transported to sludge recovery pond；
S5：Microbial degradation, by step S3 at the middle and upper levels sewage transport to biodegradable pond, by the side of microbial degradation
Method, by the eutrophy composition oxidation Decomposition in sewage；
S6：Dosing is degraded, and to oxidant is added in the biodegradable pond in step S5, oxidative degradation is promoted by oxidant
Reaction, improves reaction efficiency, and oxidant is polyacrylamide, calcium oxide and calcium aluminate powder mixture, and the polyacrylamide
120 parts of amine, 170 parts of calcium oxide, 100 parts of calcium aluminate powder；
S7：Dosing precipitation, flocculant is added in the sewage after being degraded to dosing in step S6 again, makes the product of oxidation reaction
Rapid sedimentation, the sedimentation time is 10-15 minutes；
S8：Treatment of Sludge, adds the sediment settled down after flocculant to be processed step S7, will by sludge pump
Sludge is transported to sludge recovery pond；
S9：Disinfect, upper strata sewage transport to the sterilization pool in step S7 is carried out disinfection treatment；
S10：Acid-base value is adjusted, the method by adding oxalic acid, is stirred in addition, real-time detection, and pH value control is existed
6-9；
S11：Discharge.
The total pond of sewage in the step S1 is the total pond of underground sewage, and sewage is provided with passage on total pond, and ventilates
Activated charcoal strainer is provided with hole.
Reducing mechanism is driven to crush to hammer into shape by electric rotating machine and ceaselessly rotated in the step S2, so as to by municipal sewage
Solid matter crush, prevent block pipeline, be easy to the purification of next step to degrade.
The sewage flocculant added in the step S3 is industrial alum, and industrial alum is powdered.
A point water plate, the sewage water filtration that will be remained in sludge are provided with sludge recovery pond bottom in the step S4 and S8
Out, and these residual sewages are transported in settling tank by sewage pump and are reused.
In the step S5, constantly to oxygen is passed through in biodegradable pond, microbiological oxidation efficiency is improved, improve degraded
Speed, the time for being passed through oxygen is 10-15 minutes.
The sewage flocculant added in the step S7 is industrial alum, and industrial alum is powdered.
The step S9 disinfects middle use disinfection by chlorine, and to being passed through chlorine in sterilization pool, the time for being passed through chlorine is
10-15 minutes, sewage is carried out disinfection.
The city domestic sewage processing method, reduces cost of sewage disposal, quickly that municipal sewage treatment is clean, it is up to standard after
Discharge, is recycled by the water resource that will be remained in settled sludge, efficiently using water resource, is aoxidized twice, is settled twice, only
Change effect is good, and treatment effeciency is high.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technology according to the present invention scheme and its
Inventive concept is subject to equivalent or change, should all be included within the scope of the present invention.
Claims (8)
1. a kind of city domestic sewage processing method, it is characterised in that：The city domestic sewage processing method is comprised the following steps that：
S1：, be delivered to city domestic sewage at sewage by each blow down branch by the collection of sanitary sewage, carries out unifying place
Reason, and collected by the total pond of sewage；
S2：To be crushed in sewage transport to the reducing mechanism in the total pond of sewage in step S1 using sewage pump, grinding time is
10-15 minutes；
S3：Dosing is precipitated, and reducing mechanism bottom in step s 2 sets settling tank, makes the municipal sewage after crushing in step S2
Into in settling tank, by adding the method Accelerated subsidence of flocculant, the sedimentation time is 10-15 minutes；
S4：Treatment of Sludge, adds the sludge settled down after flocculant to be processed step S3, by sludge pump that sludge is defeated
It is sent to sludge recovery pond；
S5：Microbial degradation, by step S3, sewage transport, to biodegradable pond, by the method for microbial degradation, is incited somebody to action at the middle and upper levels
Eutrophy composition oxidation Decomposition in sewage；
S6：Dosing is degraded, and to oxidant is added in the biodegradable pond in step S5, promotes oxidative degradation anti-by oxidant
Should, reaction efficiency is improved, oxidant is polyacrylamide, calcium oxide and calcium aluminate powder mixture, and the polyacrylamide
100-120 parts, calcium oxide 150-170 parts, calcium aluminate powder 80-100 parts；
S7：Dosing precipitation, flocculant is added in the sewage after being degraded to dosing in step S6 again, makes the product of oxidation reaction rapid
Sedimentation, the sedimentation time is 10-15 minutes；
S8：Treatment of Sludge, the sediment that settles down is processed after step S7 is added into flocculant, by sludge pump by sludge
It is transported to sludge recovery pond；
S9：Disinfect, upper strata sewage transport to the sterilization pool in step S7 is carried out disinfection treatment；
S10：Acid-base value is adjusted, the method by adding oxalic acid, is stirred in addition, real-time detection, by pH value control in 6-9；
S11：Discharge.
2. a kind of city domestic sewage processing method according to claim 1, it is characterised in that：Dirt in the step S1
The total pond of water is the total pond of underground sewage, is provided with the total pond of sewage in passage, and passage and is provided with activated charcoal strainer.
3. a kind of city domestic sewage processing method according to claim 1, it is characterised in that：Crushed in the step S2
Device is driven to crush to hammer into shape by electric rotating machine and ceaselessly rotated, and so as to the solid matter in municipal sewage be crushed, prevents obstruction
Pipeline, is easy to the purification of next step to degrade.
4. a kind of city domestic sewage processing method according to claim 1, it is characterised in that：Added in the step S3
Sewage flocculant be industrial alum, and industrial alum is powdered.
5. a kind of city domestic sewage processing method according to claim 1, it is characterised in that：In the step S4 and S8
Sludge recovery pond bottom in be provided with a point water plate, the sewage water filtration that will be remained in sludge out, and by sewage pump by these
Residual sewage is reused in being transported to settling tank.
6. a kind of city domestic sewage processing method according to claim 1, it is characterised in that：In the step S5, no
Disconnectedly to oxygen is passed through in biodegradable pond, microbiological oxidation efficiency is improved, improve degradation speed, the time for being passed through oxygen is
10-15 minutes.
7. a kind of city domestic sewage processing method according to claim 1, it is characterised in that：Added in the step S7
Sewage flocculant be industrial alum, and industrial alum is powdered.
8. a kind of city domestic sewage processing method according to claim 1, it is characterised in that：At the step S9 sterilizations
Disinfection by chlorine is used in reason, to chlorine is passed through in sterilization pool, the time of chlorine is passed through for 10-15 minutes, sewage is carried out disinfection.
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Cited By (11)
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| CN107555737A (en) * | 2017-11-01 | 2018-01-09 | 桂林市宏远能源科技服务有限公司 | A kind of domestic sewage processing method |
| CN107585976A (en) * | 2017-11-01 | 2018-01-16 | 桂林市宏远能源科技服务有限公司 | A kind of heavy metal-polluted method for treating water |
| CN107601783A (en) * | 2017-11-01 | 2018-01-19 | 桂林市宏远能源科技服务有限公司 | A kind of method for the treatment of city waste water |
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| CN107555737A (en) * | 2017-11-01 | 2018-01-09 | 桂林市宏远能源科技服务有限公司 | A kind of domestic sewage processing method |
| CN107585976A (en) * | 2017-11-01 | 2018-01-16 | 桂林市宏远能源科技服务有限公司 | A kind of heavy metal-polluted method for treating water |
| CN107601783A (en) * | 2017-11-01 | 2018-01-19 | 桂林市宏远能源科技服务有限公司 | A kind of method for the treatment of city waste water |
| CN107619158A (en) * | 2017-11-01 | 2018-01-23 | 桂林市宏远能源科技服务有限公司 | A kind of paper mill sewage treatment method |
| CN107759016A (en) * | 2017-11-01 | 2018-03-06 | 桂林市宏远能源科技服务有限公司 | A kind of cane mill's sewage water treatment method |
| CN108178378A (en) * | 2018-01-08 | 2018-06-19 | 骆登科 | For handling the method for sanitary sewage |
| CN109205845A (en) * | 2018-10-17 | 2019-01-15 | 林方杰 | A kind of municipal sewage oxidation treatment method |
| CN110937741A (en) * | 2019-11-13 | 2020-03-31 | 西安重光明宸检测技术有限公司 | Sewage treatment method |
| CN110921912A (en) * | 2019-12-13 | 2020-03-27 | 西安润川环保科技有限公司 | Method for removing impurities in wastewater |
| CN111302563A (en) * | 2020-02-21 | 2020-06-19 | 宁夏水投环保发展有限公司 | Widely applicable and selective landfill leachate treatment process and method |
| CN111689651A (en) * | 2020-06-22 | 2020-09-22 | 罗良胜 | Method for treating urban domestic sewage |
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