CN208440452U - A kind of processing system of paper waste foul smell - Google Patents
A kind of processing system of paper waste foul smell Download PDFInfo
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- CN208440452U CN208440452U CN201820477035.8U CN201820477035U CN208440452U CN 208440452 U CN208440452 U CN 208440452U CN 201820477035 U CN201820477035 U CN 201820477035U CN 208440452 U CN208440452 U CN 208440452U
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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
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Abstract
The utility model relates to a kind of processing systems of paper waste foul smell, including by the sequentially connected slanted screen of pipeline, pretreatment unit, anaerobic tower, aeration tank, secondary settling tank and sludge press filtration unit, further including the multiple filling layers biology spray column and activated carbon adsorption device connected by pipeline；The slanted screen, pretreatment unit, anaerobic tower, aeration tank, secondary settling tank and sludge press filtration unit pass through pipeline and connect with the multiple filling layers biology spray column, and the pretreatment unit includes passing through the sequentially connected flotation tank of pipeline and acidification pool.The utility model is accomplished to link work at selected spots with that in entire areas, slanted screen, flotation tank, acidification pool, anaerobic tower, aeration tank, secondary settling tank and the totally-enclosed collection of sludge treatment device that waste water is passed through, accomplish not leak, and the utility model to the removal rate of paper waste foul gas up to 99% or more.In addition, the utility model uses single column biochemical treatment, equipment investment is few, and operating cost is low, solves the pollution problem of equipment etching problem and ambient enviroment.
Description
Technical field:
The utility model relates to Odor control technical fields, and in particular to a kind of processing system of paper waste foul smell.
Background technique:
Due to the highly concentrated characteristic of waste paper making wastewater, anaerobic-aerobic biotechnology is obtained in waste paper making wastewater process field
It is widely applied.Foul smell, especially anaerobic stages can be generated in highly concentrated process of paper-making wastewater treatment generates a large amount of foul smell, these evils
Odour is mainly H2S、NH3, methyl mercaptan, methyl sulfide, amine etc., wherein H2S and NH3Content is more.In the anaerobism of sewage treatment
Hydrolysis section, macromolecular or particulate organic matter are broken down into volatile low molecule organic matter VOCs, are rich in paper waste
SO4 2-It is reduced to H2S, organic amine are broken down into ammonia, after these waste gas components are discharged into air, form foul gas.Together
The sludge that sample wastewater treatment process generates can also generate foul smell in processing.The stink odor and concentration of generation are with sewage, dirt
The treatment process of mud is different and different.Due to many facilities such as slanted screen of current our province papermaking enterprise sewage treatment, just heavy
Pond, aeration tank, secondary settling tank and sludge treatment device etc. are unenclosed construction, can directly give out foul gas, belong to inorganization
Face source emission.
Seldom, the waste water foul smell in most paper mills is without group for application of the prior art in highly concentrated paper waste deodorization
Knit discharge.The waste water in only a few paper mill is also not perfect with prior art processing foul smell, and general treatment effeciency is lower, it is difficult to up to standard
Discharge.Foul smell in wastewater treatment process causes greatly to corrode to the mechanical equipment outside some be exposed to, and shortens it and uses the longevity
Life, causes economic loss.Stench is one of pollution environment, six big public hazards being detrimental to health simultaneously.Wherein H2S is rotten egg
Taste, there is severe toxicity, and the perception amount of people is 0.00037mg/m3, contain 0.1%H2The gas of S can make human poisoning, the higher vulcanization of concentration
Hydrogen can make one lethal in a short time.NH3For strong pungent smell, methyl mercaptan is cabbage putrid taste, other sulfur-bearings have
Machine compound is putrid taste or undesirable foul smell.These foul gas cause the health of human body of on-site staff
Great threat；The stink that distributes in an atmosphere certainly will also influence whether surrounding area simultaneously, to the respiratory system of human body, disappear
The generations such as change system, the circulatory system, nervous system harm, directly influences people's health and living standard, severe jamming
The daily life of surrounding resident.With the development of papermaking enterprise, odor pollution is also constantly aggravating, and becomes the periphery common people and complain
With the key object of complaint, it can also cause some social conflicts when serious, affect social harmony to a certain extent.
Currently, the odor treatment method generated in wastewater treatment process mainly has WATER-WASHING METHOD, active carbon adsorption, ozone oxygen
Change method, deodorization solution deodorization process, ion deodorization method, chemical washing method and biological odor removal method etc..
WATER-WASHING METHOD is that the characteristic of water can be dissolved in using the main matter in foul smell, makes H in foul smell2S、NH3Equal gases and water connect
Touching, dissolution, achieve the purpose that deodorization, water consumption is big, and efficiency is lower.
Active carbon adsorption is to the physisorption of foul smell using active carbon come deodorization.Its advantage is that method is simple,
The disadvantage is that being only applicable in the processing of low concentration foul smell, and investment and operating cost are very high.
Ozonation is the strong oxidizing property using ozone, aoxidizes the chemical analysis in foul smell, achievees the purpose that deodorization.
Ozonation is divided into gas phase and liquid phase, since the chemical reaction that ozone occurs is slower, generally first passes through medical fluid ablution, goes
Except most of odor causing substance, ozone oxidation is then carried out again.
Deodorization solution deodorization process is covered and is neutralized unpleasant using the stronger gas odor of people's acceptable smell
The method of stink.The major advantage of this method is simple, small investment and quick.The disadvantage is that be difficult to change stink odor completely,
May still have certain extent of damage to people and animals, equipment and environment etc..
Ion deodorization method be using high-frequency and high-voltage electrostatic special burst electric discharge generate high density high energy active ion, be allowed to
Foul smell contact, destroys foul smell molecular chemical bond, the odorless substance of low molecule is resolved into, so that gas be made to achieve the purpose that purification.It should
Method processing equipment volume is relatively small, from heavy and light, is suitable for the occasions such as characteristics of compact layout, narrow field, but equipment is disposably thrown
It is larger to enter expense, operation expense is higher.
Chemical washing method is using chemicals and foul smell after chemical reaction generation is destitute of smell or stink lowerization
The method for learning product to eliminate foul smell.Such as use chemical mediator (NaOH, NaClO or H2O2) and H2The substances such as S carry out third-order reaction,
To reach deodorization purpose.The advantages of this method is the ingredient for changing foul smell, reduces foul smell to people and animals, equipment and environment etc.
The extent of damage, the disadvantage is that investment is big, operation cost is relatively high, and the product after especially chemically reacting, which has, causes new environment
A possibility that pollution and tendency need strictly to handle the chemical product after washing.
Biological odor removal method is the odor treatment method that the 1950s, Later development got up.The principle of bad smell biological purification
It is the microorganism by being attached in reactor on filler, converts the pollutant in exhaust gas to simply in metabolic processes
Inorganic matter (carbon dioxide, water and sulfate radical) and microorganism cellular material, the wherein volatility organic contamination in exhaust gas
Object is decomposed into carbon dioxide, water and other simple inorganic matters；Sulfide in sulfur-containing foul pollutant is converted into environment
Relatively stable sulfate, nitrogenous compound are converted into nitrate or nitrogen.Biological odor removal method is relative to traditional processing side
Method has the characteristics that treatment effeciency is high, operating cost is low, without secondary pollution.But there is also some problems, such as biofiltration and life
Object washing method generally require double tower combination, the major function on absorption tower be the main component of foul smell is transferred in liquid phase, thus
Realize mass transfer process, then with activated sludge process by the metabolism of microorganism handle this partially absorbed stench at
Point waste water, invest relatively high, and it mostly uses a kind of organic filler or inorganic filler to divide as microorganism carrier
Solve foul smell.Since single filler tends not to form ideal micropopulation, its adaptability to different foul smell will affect, thus
Influence its odor removal efficient；Biological island is generally single column structure, but needs Additional nutrient solution in operation, and circulation fluid need to be arranged periodically
Put processing；Its spray liquid is generally the water without deodorization functions, so it still needs further improvement for efficiency.In addition also micro- just like deodorization
The culture of biology, the screening of bacterial strain mix the processing of foul gas, optimization of technological parameter of deodorizing device etc..
It is, therefore, desirable to provide a kind of processing system and method for more applicable paper waste foul smell, to solve the above problems.
Utility model content:
The purpose of the utility model is to provide the processing systems and method of a kind of paper waste foul smell, to paper waste foul smell
Processing accomplish to link work at selected spots with that in entire areas, comprehensive collection, the slanted screen that waste water is passed through, pretreatment unit, anaerobic tower, aeration tank, secondary settling tank
With the totally-enclosed collection of sludge treatment device, accomplish not leak.
To achieve the above object, the utility model uses following technical scheme:
The processing system of paper waste foul smell provided by the utility model, comprising: by the sequentially connected slanted screen of pipeline, in advance
Processing unit, anaerobic tower, aeration tank, secondary settling tank and sludge press filtration unit further include the multiple filling layers life connected by pipeline
Object spray column and activated carbon adsorption device；The slanted screen, pretreatment unit, anaerobic tower, aeration tank, secondary settling tank and sludge press filtration list
Member is connect by pipeline with the multiple filling layers biology spray column, and the pretreatment unit includes being sequentially connected with by pipeline
Flotation tank and acidification pool.
Processing is sealed at the top of the anaerobic tower.
The pond face of flotation tank, acidification pool and aeration tank, secondary settling tank in the pretreatment unit is sealed processing.
The mesh of the slanted screen is 120~150 mesh, and the slanted screen is sealed processing.
The workshop of the sludge press filtration operation is integrally sealed processing.
Several spray heads are provided with above the multiple filling layers biology spray column, the spray head is fed by pipeline circulation
Biological spray liquid, and circulation metering pump is installed on the pipeline connecting with spray head.
The biology spray liquid, which is compounded by plant extracts with chitosan, to be made, and the plant extracts is ginkgo leaf, tea
Leaf, bamboo, camphortree leaf, any three kinds or more plant extracts in pine.
The internal circulating load of the biology spray liquid is 20~30m3/ h, it is primary every 5~10 days supplements.
The filler used in the multiple filling layers biology spray column includes Pall ring, Raschig ring and the biology of multistage arrangement
Filler, above-mentioned three kinds of fillers combine in tower, in two layers of arrangement, two layers of total a height of 1~2m.
The biologic packing material is made of bamboo charcoal, charcoal, useless flaxen fiber 1:0.3~0.5:0.3~0.5 in mass ratio.
And in first layer packing layer, the height ratio of Pall ring, Raschig ring and biologic packing material is 1:1~2:1~2,
In second layer filler, the height ratio of Pall ring, Raschig ring and biologic packing material is 1:0.5~1:2~3.
When the operating temperature of the multiple filling layers biology spray column is 30~40 DEG C, pH value is 1.2~2.0, gas stops
Between be 8~12 seconds.
The material of active carbon is cocoanut active charcoal in the activated carbon adsorption device, and average grain diameter is 8~10 mesh, layer
A height of 1~2m, replacement cycle are 5~October, and gas residence time is 8~12 seconds.
A kind of processing system of the paper waste foul smell of the utility model the utility model has the advantages that
It cannot accomplish to link work at selected spots with that in entire areas for the prior art, comprehensive collection, therefore still have the point of release, papermaking odor pollution problem,
The utility model is accomplished to link work at selected spots with that in entire areas, comprehensive collection, slanted screen, the pretreatment unit, anaerobic tower, aeration tank, two passed through to waste water
Heavy pond and the totally-enclosed collection of sludge treatment device, accomplish not leak；
Its technology for using biology spray deodorization to combine with microorganism decomposition deodorization, the absorption of foul smell and decomposable process are only
It need to can be fully completed in a tower, realize double tower unification, structure is very compact, small investment.The utility model uses plant
The biological spray liquid circulated sprinkling foul smell that extract is prepared, biological spray liquid can absorb rapidly the evil such as hydrogen sulfide, methyl mercaptan, ammonia
Odour occurs the reactions such as polymerization, substitution, displacement, absorption, so that original polluted gas odor molecules structure is changed, be allowed to
Become nontoxic, tasteless molecule, to achieve the effect that deodorization.Biological spray liquid is used as microorganism to provide source simultaneously, sprays in circulation
Promote microorganism to grow on filler during leaching, utilizes the metabolic decomposing H of microorganism2S、NH3Equal foul smell, to realize
Biology spray deodorization is combined with microorganism decomposition deodorization, and compared to the biological deodorization system of clear water spray, the utility model has
Higher odor removal efficient.In addition biological spray liquid, which also acts as, provides the effect in microbial nutrition source, so the utility model need not
Additional nutrient solution is provided, without regular discharge cycle liquid, also mitigates the burden of wastewater treatment；
Simultaneously also using Pall ring, Raschig ring and the biologic packing material of independent research as microorganism carrier, filled out a variety of
Material combines multi-tier arrangement in tower, gives full play to various types of filler advantage, can form multiple types micropopulation on filler, improve
To the adaptability of different foul smell, to effectively improve removal efficiency；
Using biology spray and activated carbon adsorption second level deodorization technology, this yet there are no correlation in paper waste deodorization at home
Report.Biology, which sprays, can be achieved major part H2S、NH3, the foul smell such as methyl mercaptan decomposition, after active carbon physical absorption is as deodorization
Continuation of insurance barrier, technical combinations treatment effeciency is high, removal effect is obvious, to the removal rate of main foul gas up to 99% or more, makes
Exhaust reaches " emission standard for odor pollutants " (GB14554-93) secondary discharge standard.The second level deodorization technology of the utility model
Harmful chemical agent is not used, energy demand is cheap, does not generate secondary pollution, and it is one that last product, which is benign,
The highly concentrated paper waste deodorizing methods of the real green of kind；
Using single column biochemical treatment, equipment investment is few, does not need Additional nutrient solution in system operation, circulation fluid is not arranged
It puts, operating cost is low, and odor removal efficient is high, solves equipment etching problem and harm and pollution to human health and ambient enviroment
Problem.
Detailed description of the invention:
Fig. 1 is a kind of processing system block diagram of paper waste foul smell of the utility model；
In figure: 1- slanted screen, 2- pretreatment unit, 3- anaerobic tower, the aeration tank 4-, 5- secondary settling tank, 6- sludge press filtration unit, 7-
Multiple filling layers biology spray column, 8- activated carbon adsorption device, 9- pipeline.
Specific embodiment:
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, fall within the protection scope of the utility model.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute in the utility model embodiment
It is only used for explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, such as
When the fruit particular pose changes, then directionality instruction also correspondingly changes correspondingly.
It in addition, the technical solution between each embodiment can be combined with each other, but must be with ordinary skill
Based on personnel can be realized, this technical side will be understood that when the combination of technical solution appearance is conflicting or cannot achieve
The combination of case is not present, also not within the protection scope of the requires of the utility model.
According to Fig. 1, the processing system of paper waste foul smell provided by the utility model, comprising: sequentially by pipeline 9
Slanted screen 1, pretreatment unit 2, anaerobic tower 3, aeration tank 4, secondary settling tank 5 and the sludge press filtration unit 6 of connection, further include passing through pipe
The multiple filling layers biology spray column 7 and activated carbon adsorption device 8 that road 9 connects；The slanted screen 1, pretreatment unit 2, anaerobic tower 3,
Aeration tank 4, secondary settling tank 5 and sludge press filtration unit 6 are connect by pipeline 9 with the multiple filling layers biology spray column 7, and described
Pretreatment unit 2 includes passing through the sequentially connected flotation tank of pipeline 9 and acidification pool, and carry out to the top of the anaerobic tower 3 close
Envelope is handled, and the pond face of flotation tank, acidification pool and aeration tank 4, secondary settling tank 5 in the pretreatment unit 2 is sealed processing,
The mesh of the slanted screen 1 is 120~150 mesh, and the slanted screen 1 is sealed processing, the workshop of 6 operation of sludge press filtration unit
Entirety is sealed processing, and the utility model is linked work at selected spots with that in entire areas, comprehensive collection, slanted screen 1, pretreatment to waste water process
Unit 2, anaerobic tower 3, aeration tank 4, secondary settling tank 5 and the totally-enclosed collection of sludge press filtration unit 6, accomplish not leak.
Further, several spray heads, institute are provided with above the spray column of multiple filling layers biology described in above-mentioned technical proposal 7
It states spray head and biological spray liquid is fed by the circulation of pipeline 9, and circulation metering is installed on the pipeline 9 connecting with spray head
Pump.
Further, biology spray liquid described in above-mentioned technical proposal compounds system with chitosan by 3~5 Plant Extracts
, the plant extracts is ginkgo leaf, tealeaves, bamboo, camphortree leaf, any three kinds or more plant extract in pine
Object；When actually being sprayed, the internal circulating load of the biology spray liquid is 20~30m3/ h, and it is primary every 5~10 days supplements.
Further, the filler used in multiple filling layers biology spray column 7 as described in the above technical scheme includes multistage
Pall ring, Raschig ring and the biologic packing material of arrangement, above-mentioned three kinds of fillers combine in tower, arrange in two layers, total a height of the 1 of two layers
~2m, and in first layer packing layer, the height ratio of Pall ring, Raschig ring and biologic packing material is 1:1~2:1~2, second
In layer filler, the height ratio of Pall ring, Raschig ring and biologic packing material is 1:0.5~1:2~3, and further, the biology
Filler is made of bamboo charcoal, charcoal, useless flaxen fiber 1:0.3~0.5:0.3~0.5 in mass ratio, in actual job, the multilayer
The operating temperature of filler biological spray column 7 is 30~40 DEG C, pH value is 1.2~2.0, gas residence time is 8~12 seconds.
Further, the material of active carbon is cocoanut active charcoal in activated carbon adsorption device 8 described in above-mentioned technical proposal,
Average grain diameter is 8~10 mesh, and a height of 1~2m of layer, the replacement cycle is 5~October, and gas residence time is 8~12 seconds.
With reference to the accompanying drawing be described in detail the utility model paper waste stench processing system to paper waste foul smell into
Detailed process of row processing, the specific steps are as follows:
The fiber fines in paper waste are recycled by slanted screen 1 first；Then by pretreatment unit 2 to papermaking
Waste water is pre-processed；By anaerobic tower 3 use UMIC system for anaerobic treatment to reducing substances in paper waste at
Reason；Aeration Aerobic Process for Treatment is carried out using activated sludge process to paper waste in aeration tank 4；Water after being precipitated by secondary settling tank 5 returns
With or discharge；The sludge generated after processing comprehensively utilizes after 6 filters pressing of sludge press filtration unit；In slanted screen 1, pretreatment unit 2, detest
The foul smell generated in oxygen column 3,6 treatment process of aeration tank 4, secondary settling tank 5 and sludge press filtration unit is passed through the spray of multiple filling layers biology
7 level-one deodorization of tower is drenched, is reached after the 7 level-one deodorization of multiple filling layers biology spray column, then after 8 second level deodorization of activated carbon adsorption device
Mark discharge.
The preparation method of biological spray liquid employed in the multiple filling layers biology spray column 7 is specific as follows: first with clear
For water by powdered plant extract stirring and dissolving, it is 0.3~0.5% biological spray liquid that concentration is then configured in circulating water pool,
Wherein, the mixing speed is 300~500 turns/min, and solution temperature is 20~40 DEG C, and mixing time is 10~30min.
Further, pretreating process as described in the above technical scheme specifically: first waste water is carried out just with flotation tank
Step processing, removes most suspended substances；Then pre-acidified processing is carried out by acidification pool, pre-acidified retention time of sewage is 4~5
Hour, pH value is 6.5~7.5, and pre-acidified degree is 40~50%.
The utility model detects foul smell (foul smell for going out biological spray column) concentration after level-one deodorization, each component
Odor concentration range is as follows: concentration≤30mg/L of foul smell molecule, ammonia≤2mg/L, hydrogen sulfide≤0.1mg/L, and mercaptan≤
0.01mg/L。
The odor concentration range escaped from activated carbon adsorption device: odor concentration≤25mg/L, ammonia≤1mg/L, hydrogen sulfide
≤ 0.05mg/L, mercaptan≤0.005mg/L, odor removal efficient is up to 99% or more.
Finally it should be noted that: above embodiments are only to illustrate the technical solution of the utility model rather than limit it
System, although the utility model is described in detail referring to above-described embodiment, those of ordinary skill in the art should be managed
Solution: specific implementation of the utility model can still be modified or equivalent replacement, and without departing from the utility model
Any modification of spirit and scope or equivalent replacement should all cover in present claims range.
Claims (10)
1. a kind of processing system of paper waste foul smell, comprising: pass through the sequentially connected slanted screen of pipeline, pretreatment unit, anaerobism
Tower, aeration tank, secondary settling tank and sludge press filtration unit, it is characterised in that: further include the multiple filling layers biology spray connected by pipeline
Drench tower and activated carbon adsorption device；The slanted screen, pretreatment unit, anaerobic tower, aeration tank, secondary settling tank and sludge press filtration unit are equal
It is connect by pipeline with the multiple filling layers biology spray column, and the pretreatment unit includes passing through the sequentially connected gas of pipeline
Floating pond and acidification pool.
2. the processing system of paper waste foul smell according to claim 1, it is characterised in that: the top of the anaerobic tower into
Row encapsulation process.
3. the processing system of paper waste foul smell according to claim 1, it is characterised in that: in the pretreatment unit
Flotation tank, acidification pool and aeration tank, secondary settling tank pond face be sealed processing.
4. the processing system of paper waste foul smell according to claim 1, it is characterised in that: the mesh of the slanted screen is
120~150 mesh, the slanted screen are sealed processing.
5. the processing system of paper waste foul smell according to claim 1, it is characterised in that: the sludge press filtration operation
Workshop is integrally sealed processing.
6. the processing system of paper waste foul smell according to claim 1, it is characterised in that: the multiple filling layers biology spray
Several spray heads are provided with above leaching tower, the spray head feeds biological spray liquid by pipeline circulation, and connects with spray head
Circulation metering pump is installed on the pipeline connect.
7. the processing system of paper waste foul smell according to claim 1, it is characterised in that: the multiple filling layers biology
The filler used in spray column includes Pall ring, Raschig ring and the biologic packing material of multistage arrangement, above-mentioned three kinds of fillers group in tower
It closes, in two layers of arrangement, two layers of total a height of 1~2m.
8. the processing system of paper waste foul smell according to claim 7, it is characterised in that: in first layer packing layer,
The height ratio of Pall ring, Raschig ring and biologic packing material be 1:1~2:1~2, in second layer filler, Pall ring, Raschig ring and
The height ratio of biologic packing material is 1:0.5~1:2~3.
9. the processing system of paper waste foul smell according to claim 6, it is characterised in that: the biology spray liquid is by planting
Object extract is compounded with chitosan to be made.
10. the processing system of paper waste foul smell according to claim 1, it is characterised in that: the activated carbon adsorption dress
The material for setting middle active carbon is cocoanut active charcoal, and average grain diameter is 8~10 mesh, a height of 1~2m of layer.
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| CN201820477035.8U CN208440452U (en) | 2018-04-04 | 2018-04-04 | A kind of processing system of paper waste foul smell |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108264203A (en) * | 2018-04-04 | 2018-07-10 | 浙江荣晟环保纸业股份有限公司 | A kind of processing system and method for paper waste foul smell |
| CN111410306A (en) * | 2020-04-09 | 2020-07-14 | 江苏理文造纸有限公司 | Treatment method for recycling biochemical sludge |
| CN111847559A (en) * | 2020-07-08 | 2020-10-30 | 西安建筑科技大学 | Device for controlling harmful gas in pipeline by micro-nano bubbles |
-
2018
- 2018-04-04 CN CN201820477035.8U patent/CN208440452U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108264203A (en) * | 2018-04-04 | 2018-07-10 | 浙江荣晟环保纸业股份有限公司 | A kind of processing system and method for paper waste foul smell |
| CN108264203B (en) * | 2018-04-04 | 2023-09-26 | 浙江荣晟环保纸业股份有限公司 | System and method for treating odor of papermaking wastewater |
| CN111410306A (en) * | 2020-04-09 | 2020-07-14 | 江苏理文造纸有限公司 | Treatment method for recycling biochemical sludge |
| CN111847559A (en) * | 2020-07-08 | 2020-10-30 | 西安建筑科技大学 | Device for controlling harmful gas in pipeline by micro-nano bubbles |
| CN111847559B (en) * | 2020-07-08 | 2022-08-19 | 西安建筑科技大学 | Device for controlling harmful gas in pipeline by micro-nano bubbles |
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