CN103420542B - Wastewater recycling process for waste paper pulping and manufacturing bobbin paper - Google Patents
Wastewater recycling process for waste paper pulping and manufacturing bobbin paper Download PDFInfo
- Publication number
- CN103420542B CN103420542B CN201310348609.3A CN201310348609A CN103420542B CN 103420542 B CN103420542 B CN 103420542B CN 201310348609 A CN201310348609 A CN 201310348609A CN 103420542 B CN103420542 B CN 103420542B
- Authority
- CN
- China
- Prior art keywords
- waste water
- water
- ozone
- waste
- activated carbon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 107
- 230000008569 process Effects 0.000 title claims abstract description 96
- 239000010893 paper waste Substances 0.000 title claims abstract description 74
- 239000002351 wastewater Substances 0.000 title claims abstract description 74
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000004537 pulping Methods 0.000 title abstract description 6
- 238000004064 recycling Methods 0.000 title abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 108
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 91
- 238000001728 nano-filtration Methods 0.000 claims abstract description 41
- 238000001471 micro-filtration Methods 0.000 claims abstract description 40
- 239000012528 membrane Substances 0.000 claims description 67
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 37
- 239000000126 substance Substances 0.000 claims description 25
- 238000011068 loading method Methods 0.000 claims description 24
- 238000005273 aeration Methods 0.000 claims description 23
- 230000007062 hydrolysis Effects 0.000 claims description 23
- 238000006460 hydrolysis reaction Methods 0.000 claims description 23
- 230000015556 catabolic process Effects 0.000 claims description 19
- 238000006731 degradation reaction Methods 0.000 claims description 19
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 17
- 229910052760 oxygen Inorganic materials 0.000 claims description 17
- 239000001301 oxygen Substances 0.000 claims description 17
- 238000001914 filtration Methods 0.000 claims description 16
- 230000031018 biological processes and functions Effects 0.000 claims description 15
- 230000000694 effects Effects 0.000 claims description 14
- 230000003647 oxidation Effects 0.000 claims description 12
- 238000007254 oxidation reaction Methods 0.000 claims description 12
- 239000002957 persistent organic pollutant Substances 0.000 claims description 12
- 238000010521 absorption reaction Methods 0.000 claims description 10
- 238000002203 pretreatment Methods 0.000 claims description 10
- 239000010802 sludge Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 239000000084 colloidal system Substances 0.000 claims description 8
- 239000005446 dissolved organic matter Substances 0.000 claims description 8
- 150000002500 ions Chemical class 0.000 claims description 8
- 244000005700 microbiome Species 0.000 claims description 8
- 241000894006 Bacteria Species 0.000 claims description 7
- 229920002521 macromolecule Polymers 0.000 claims description 7
- 238000012856 packing Methods 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 6
- 230000002906 microbiologic effect Effects 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 239000003610 charcoal Substances 0.000 claims description 4
- 238000012545 processing Methods 0.000 abstract description 7
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 abstract description 2
- 229910001424 calcium ion Inorganic materials 0.000 abstract description 2
- 229920005610 lignin Polymers 0.000 abstract description 2
- 239000000123 paper Substances 0.000 description 16
- 229910052799 carbon Inorganic materials 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000004065 wastewater treatment Methods 0.000 description 4
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 239000013505 freshwater Substances 0.000 description 3
- 229910052740 iodine Inorganic materials 0.000 description 3
- 239000011630 iodine Substances 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 230000000274 adsorptive effect Effects 0.000 description 2
- 241001148470 aerobic bacillus Species 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000009395 breeding Methods 0.000 description 2
- 230000001488 breeding effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 2
- 230000035764 nutrition Effects 0.000 description 2
- 235000016709 nutrition Nutrition 0.000 description 2
- 239000011087 paperboard Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000370738 Chlorion Species 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 241000202567 Fatsia japonica Species 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 241000274582 Pycnanthus angolensis Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 230000002070 germicidal effect Effects 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 235000014593 oils and fats Nutrition 0.000 description 1
- -1 old newsprint Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000010908 plant waste Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Landscapes
- Water Treatment By Sorption (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention provides a wastewater recycling process for waste paper pulping and manufacturing bobbin paper. The wastewater recycling process is characterized in that waste water is sequentially subjected to high-efficient anaerobic organism processing, aerobic organism processing, ozone-biological activated carbon processing and microfiltration and nanofiltration processing, and water after processing is recycled. Refractory organics such as residual lignin in the wastewater can be effectively removed, COD removal rate is more than 98 percent, and Ca2+ and Mg2+ removal rates are also high and are respectively larger than 75 percent and 85 percent.
Description
Technical field
The present invention relates to field of environment protection and the Industrial Wastewater Treatment engineering of paper industry, be specifically related to a kind of waste paper pulp-making manufacture cop tube paper waste water reclamation and utilize treatment process.
Background technology
The fast development of China's paper industry, cause the contradiction between itself and resource, environment outstanding day by day, be mainly manifested in the scarcity of resources of plant fiber material and water of productive use, paper-making effluent is day by day serious to the pollution of environment, become two large bottlenecks of its development of restriction.The papermaking of waste paper class generally with useless paperboard, old newsprint, waste oils and fats, other paper product waste material and commercial pulp (mostly being bleaching wood pulp) for main raw material, produce the product such as white board, boxboard, fluting board.According to estimates, in 2005, China's waste paper utilization rate reaches 40%, and waste paper dosage is more than 2,000 ten thousand tons, and now, China's paper waste consumption has accounted for 52% of paper making pulps total amount.Waste paper is recycled and is not only conducive to alleviating shortage of resources, protection of the environment, returns that enterprise brings investment reduction, reduces costs, decreasing pollution, improves the economic benefit of each side such as quality.
Paper industry is again water pollutions rich and influential family with water rich and influential family, and it is a far-reaching research topic that water saving and water prevention pollute.The process of current domestic papermaking (waste paper class) waste water is conceived to component loops more and utilizes and process water water quality reaching standard is discharged, and result is that the wastewater discharge reduced is unsatisfactory with process water Effects of Water Quality.In recent years, the closed circulation of paper waste and zero-discharge technology become the important directions of pulping wastewater treatment technical study.External is that the pulping and paper-making of raw material much realizes zero release with waste paper, and China also makes important progress in the research and practice of Paper-making Waste Paper zero-discharge technology.
Waste paper making wastewater zero release can make a ton consumption for paper fresh water drop to 1.5m
3, reduce fresh water processing costs, discharge of wastewater and cost for wastewater treatment can be avoided simultaneously, effluent charge need not be paid to environmental administration, because fresh water consumption reduces, plain boiled water temperature be improved, thus improve wet end drainability, improve the mass dryness fraction after squeezing, reduce energy consumption for drying.But adopt the risk that totally-enclosed existence is certain, mainly the burn into of system produces scent of compound, increase rotten slurry and produce, reduce retention, produce precipitation, cause operation troubles, reduce quality product etc.
Realize zero release and also there are some shortcomings, such as odor problem simultaneously, produce hydrogen sulfide because plain boiled water in the circulating cycle acidifying anaerobism can occur.The concentration of pollutent improves, as gluing thing, anionic trash etc. can occur the problems such as disconnected paper to paper machine operation.Because COD concentration is high, easily generate microbial film at the wet end of paper machine.The accumulation of high-temperature and chlorion can produce stronger corrosion to paper machine.For some paper product, such as Case Board, the closed concentration that can raise calcium ion of water loop, easily causes the fouling of whole water system.
For degradation problem under system corrosion, smell and quality product that the zero release of solution regenerated papermaking occurs, need to provide a kind of efficient, clean waste paper making wastewater to recycle technique and device.
Summary of the invention
For degradation problem under system corrosion, smell and quality product that the zero release of solution regenerated papermaking occurs, need to provide a kind of efficient, clean waste paper making wastewater to recycle technique and device.
For realizing object of the present invention, the invention provides a kind of waste paper pulp-making manufacture cop tube paper waste water reclamation and utilize treatment process, its novelty is embodied in: through efficient anaerobe process, Aerobic biological process, ozone after waste water is first---and biological activated carbon process, micro-filtration and nanofiltration process, the water outlet after process is recycled.
Foregoing waste paper pulp-making manufactures cop tube paper waste water reclamation and utilizes treatment process, preferred scheme is, described efficient anaerobe process refers to: waste water is first through the process of hydrolysis pre-acidified, utilize hydrolysis anaerobion, remove a part of organic pollutant, most of hardly degraded organic substance in waste water, through anaerobically fermenting, decomposes and produces CH by water outlet
4bioenergy.Be more preferably, waste water is before the process of hydrolysis pre-acidified, first (preferred through the process of pre-treatment facility, described pre-treatment facility is grid pump well, tiltedly net, settling tank and/or equalizing tank), remove drift suspended substance larger in waste water, reclaim longer fiber, and the regulating water quality water yield.In described grid pump well, interval of grid strip is 15-25mm, and oblique net is that (preferred, in described grid pump well, interval of grid strip is 18-22mm to 100-150 order, oblique net is 120-140 order, be more preferably, in described grid pump well, interval of grid strip is 20mm, and oblique net is 130 orders.）。
Foregoing waste paper pulp-making manufactures cop tube paper waste water reclamation and utilizes treatment process, preferred scheme is, waste water is when hydrolysis pre-acidified process, state modulator is: hydraulic detention time is 6-8h, dissolved oxygen concentration≤0.5mg/L, temperature of reaction maintains 25-30 DEG C, and (preferred, state modulator is: hydraulic detention time is 7h, dissolved oxygen concentration≤0.5mg/L, temperature of reaction maintains 28 DEG C).
Foregoing waste paper pulp-making manufactures cop tube paper waste water reclamation and utilizes treatment process, preferred scheme is, described Aerobic biological process refers to, in aeration tank, (described aeration tank dissolved oxygen concentration is 2-4mg/L, sludge loading is 0.2-0.4kgBOD/ (kgd), preferably, described aeration tank dissolved oxygen concentration is 3mg/L, sludge loading is 0.3kgBOD/ (kgd)) in remove majority of organic pollutants in water by means of the absorption of aerobic microbiological, oxidation, Degradation, aeration tank water outlet flows into second pond, the suspended substance in Separation of Water.
Foregoing waste paper pulp-making manufactures cop tube paper waste water reclamation and utilizes treatment process, and preferred scheme is, described second pond hydraulic detention time is 1.5-4h, and hydraulic surface loading is 0.6-1.5m
3/ (m
2h) (preferred, hydraulic detention time is 2h, and hydraulic surface loading is 1m
3/ (m
2h)).
Foregoing waste paper pulp-making manufactures cop tube paper waste water reclamation and utilizes treatment process, preferred scheme is, described ozone---biological activated carbon process refers to, secondary clarifier effluent enters ozone---and biological activated carbon system is (preferred, described ozone---biological activated carbon system is made up of ozone contact tower and biological activated carbon filter, and described ozone contact tower is cylinder tower, and its aspect ratio is 6-8, ozone contact time is 5-10min, and ozone dosage is 0.5-1mg/L; In described biological activated carbon filter, the loading height of gac is 1.5-2m, and packing density is 480-500g/L, and the filtering velocity in filter tank is 8-10m/h, and duration of contact is 10-15min.), utilize the oxidation capacity of ozone by long-chain, larger molecular organics degraded in waste water, utilize the dissolved organic matter in charcoal absorption water, microorganism in enrichment water, and remove suspended substance.
Foregoing waste paper pulp-making manufactures cop tube paper waste water reclamation and utilizes treatment process, preferred scheme is, described micro-filtration refers to, by the effect of microfiltration membrane equipment, particle, bacterium, colloid are sieved, filtered, (preferred, described microfiltration membrane equipment is that Jiangsu Kaimi Membrane Technology Co., Ltd. produces, and the membrane module adopted is that GE company of the U.S. produces to make it be separated with waste water, microfiltration membrane sheet model is JX, and filtering accuracy is 0.3um).
Foregoing waste paper pulp-making manufactures cop tube paper waste water reclamation and utilizes treatment process, preferred scheme is, described nanofiltration refers to, micro-filtration water outlet enters nano-filtration membrane equipment, by the effect of nanofiltration membrane, the organic macromolecule of the difficult degradation remained in waste water and divalence or polyvalent ion are filtered (preferred, described nano-filtration membrane equipment is that Hangzhou Saite membrane technique company limited produces, the membrane module adopted is that GE company of the U.S. produces, nanofiltration membrane sheet model is DK, working pressure 0.6-1MPa, filtering accuracy is 0.001-0.1 um).
Present invention also offers a kind of waste paper pulp-making and manufacture cop tube paper wastewater recycling system, mainly comprise efficient anaerobe treatment unit, Aerobic biological process device, the ozone---biological activated carbon treatment unit, micro-filtration and the nanofiltration treatment unit that are connected successively.Described efficient anaerobe treatment unit forms by being hydrolyzed pre-acidified pond+high efficiency anaerobic reactor.Described Aerobic biological process device is made up of aeration tank and second pond.Described ozone---biological activated carbon treatment unit is made up of ozone contact tower and biological activated carbon filter.Described ozone contact tower is cylinder tower, and its aspect ratio is 6 ~ 8.In described biological activated carbon filter, the loading height of gac is 1.5 ~ 2m, and packing density is 480 ~ 500g/L.
A kind of waste paper pulp-making that invention provides manufactures cop tube paper waste water reclamation and utilizes technique, comprises the step that following order is carried out:
1, efficient anaerobe process: waste water is first sequentially through pre-treatment structures such as grid pump wells, tiltedly net, settling tank and equalizing tank, remove drift suspended substance larger in waste water, reclaim longer fiber, and enter efficient anaerobe treatment system after the regulating water quality water yield.Described efficient anaerobic system forms by being hydrolyzed pre-acidified pond+high efficiency anaerobic reactor.Waste water is first through the process of hydrolysis pre-acidified, utilize hydrolysis anaerobion, the larger molecular organics of difficult degradation in water is decomposed into the small organic molecule of easily degraded, realize broken ring chain rupture, remove a part of organic pollutant, alleviate subsequent biological treatment difficulty, water outlet carries out anaerobically fermenting through anaerobism feed tank pump input high efficiency anaerobic reactor, is decomposed by the biological action of anaerobic granular sludge bed and produces CH by the most of hardly degraded organic substance in waste water
4bioenergy.
In described grid pump well, interval of grid strip is 15 ~ 25mm, and oblique net is 100 ~ 150 orders.
The hydraulic detention time in described hydrolysis pre-acidified pond is 6-8h, dissolved oxygen concentration≤0.5mg/L.
2, Aerobic biological process: anaerobic effluent enters aerobic treatment system, removes majority of organic pollutants in water by means of the absorption of aerobic microbiological, oxidation, Degradation in aeration tank.Aeration tank water outlet is from flowing into second pond, the suspended substance in Separation of Water.
Described aerobic treatment system is made up of aeration tank and second pond.Described aeration tank dissolved oxygen concentration is 2 ~ 4mg/L, and sludge loading is 0.2 ~ 0.4kgBOD/ (kgd).Described second pond hydraulic detention time is 1.5 ~ 4h, and hydraulic surface loading is 0.6 ~ 1.5m
3/ (m
2h).
3, ozone---biological activated carbon process: secondary clarifier effluent enters ozone---biological activated carbon system.Utilize the oxidation capacity of ozone by the long-chains such as the colloid of difficult for biological degradation remaining in waste water and xylogen, larger molecular organics degraded, be translated into less and degradable organism.Self there is the characteristic that hole is many, specific surface area is large, can dissolved organic matter in rapid adsorption water, microorganism that also can be a large amount of in enrichment water.The dissolved organic matter being attracted to activated carbon surface provides nutrition source for microorganism, and in carbon bed, the aerobic bacteria of raised growth breeding and the adsorptive power of gac are carried out water outlet and removed suspended substance through flocculation sedimentation tank simultaneously.
Described ozone---biological activated carbon system is made up of ozone contact tower and biological activated carbon filter.Described ozone contact tower is cylinder tower, and its aspect ratio is 6 ~ 8, and ozone contact time is 5 ~ 10min, and ozone dosage is 0.5 ~ 1mg/L.In described biological activated carbon filter, the loading height of gac is 1.5 ~ 2m, and packing density is 480 ~ 500g/L, and the filtering velocity in filter tank is 8 ~ 10m/h, and duration of contact is 10 ~ 15min.The gac adopted is the granular carbon that Shanghai Xin Hui gac company limited produces, and particle diameter is 8 ~ 30 orders, specific surface area>=1000m
2/ g, intensity>=95%, iodine number>=1000mg/g.
The waste water of 4, micro-filtration: through ozone---biological activated carbon process enters microfiltration membrane equipment, is sieved, filters, make it be separated with waste water by the effect of microfiltration membrane to the particle of 0.1 ~ 10 μm of size, bacterium, colloid.
Described microfiltration membrane equipment is that Jiangsu Kaimi Membrane Technology Co., Ltd. produces, and the membrane module adopted is the membrane element that GE company of the U.S. produces, and microfiltration membrane sheet model is JX, and filtering accuracy is 0.3um.
5, nanofiltration: micro-filtration water outlet enters nano-filtration membrane equipment, by the effect of nanofiltration membrane by the organic macromolecule of difficult degradation that remains in waste water and divalence or polyvalent ion as Ca
2+, Mg
2+ions etc., the source after process is recycled in paper.
Described nano-filtration membrane equipment is that Hangzhou Saite membrane technique company limited produces, and the membrane module adopted is the membrane element that GE company of the U.S. produces, and nanofiltration membrane sheet model is DK, working pressure 0.6 ~ 1MPa, and filtering accuracy is 0.001 ~ 0.1 um.
Advantage of the present invention and positively effect are embodied in:
A. a kind of waste paper pulp-making provided by the invention manufactures cop tube paper waste water reclamation and utilizes technique, and its technical process is simple, convenient operation and management.
B. waste water reclamation provided by the invention utilizes technique, stable effluent quality, effectively solves the problem such as system corrosion, smell that paper making wastewater zero discharge occurs.Meanwhile, this technique achieves the recycle of waste water, saves great lot of water resources.
C. the present invention adopts ozone---and BAC process processes the waste water after biochemical treatment, ozone has strong oxidizing property, the difficult degradation larger molecular organics remained in waste water can be decomposed into can be biochemical small organic molecule, also there is germicidal action simultaneously, to alleviate in waste water bacterium to the pollution of subsequent film separating unit.
D. the present invention adopts microfiltration systems as the pretreatment technology of nanofiltration process, can remove the macromolecular substance in waste water, and ensure that nanofiltration is to the requirement of influent quality, protection nanofiltration membrane component, improves separation efficiency.
E. the present invention adopts nanofiltration system, effectively to remove in waste water the hardly degraded organic substances such as residual lignin, COD clearance up to more than 98%, to Ca
2+, Mg
2+clearance is also very high, is greater than 75% and 85% respectively.
F. micro-filtration is adopted---nanofiltration membrane separation system, working pressure is low, requires low to system dynamic, thus reduces the investment cost of whole plant.Can realize Automated condtrol, reliable, floor space is little.Only by the impellent of pressure as membrane sepn, therefore device is simple, easily keeps in repair, simple to operate, water conditioning.Reduce the use of chemical agent simultaneously, reduce secondary pollution.Separation efficiency is high, and water quality is excellent.
Accompanying drawing explanation
Fig. 1 is that a kind of waste paper pulp-making manufacture cop tube paper waste water reclamation provided by the invention utilizes processing technological flow schematic diagram.
Embodiment
Below in conjunction with technical process Fig. 1 and embodiment, the present invention will be further described.
Embodiment 1 one kinds of waste paper pulp-makings manufacture cop tube paper waste water reclamation and utilize treatment process, through efficient anaerobe process, Aerobic biological process, ozone after waste water is first---and biological activated carbon process, micro-filtration and nanofiltration process, the water outlet after process is recycled.
Embodiment 2 one kinds of waste paper pulp-makings manufacture cop tube paper waste water reclamation and utilize treatment process, through efficient anaerobe process, Aerobic biological process, ozone after waste water is first---and biological activated carbon process, micro-filtration and nanofiltration process, the water outlet after process is recycled.
Described efficient anaerobe process refers to: waste water is first through the process of hydrolysis pre-acidified, and utilize hydrolysis anaerobion, remove a part of organic pollutant, the most of hardly degraded organic substance in waste water, through anaerobically fermenting, decomposes and produces CH by water outlet
4bioenergy.
Described Aerobic biological process refers to, in aeration tank, remove majority of organic pollutants in water by means of the absorption of aerobic microbiological, oxidation, Degradation, aeration tank water outlet flows into second pond, the suspended substance in Separation of Water.
Described ozone---biological activated carbon process refers to, secondary clarifier effluent enters ozone---biological activated carbon system, utilize the oxidation capacity of ozone by long-chain, larger molecular organics degraded in waste water, utilize the dissolved organic matter in charcoal absorption water, microorganism in enrichment water, and remove suspended substance.
Described micro-filtration refers to, is sieved, filters, make it be separated with waste water by the effect of microfiltration membrane equipment to particle, bacterium, colloid.
Described nanofiltration refers to, micro-filtration water outlet enters nano-filtration membrane equipment, the organic macromolecule of the difficult degradation remained in waste water and divalence or polyvalent ion is filtered by the effect of nanofiltration membrane.
Embodiment 3 one kinds of waste paper pulp-makings manufacture cop tube paper waste water reclamation and utilize treatment process, step is substantially the same manner as Example 2, unlike, waste water is before the process of hydrolysis pre-acidified, first through the process of pre-treatment facility, remove drift suspended substance larger in waste water, reclaim longer fiber, and the regulating water quality water yield, described pre-treatment facility is grid pump well, tiltedly net, settling tank and/or equalizing tank, in described grid pump well, interval of grid strip is 15-25mm, and oblique net is 100-150 order.Waste water is when hydrolysis pre-acidified process, and state modulator is: hydraulic detention time is 6-8h, and dissolved oxygen concentration≤0.5mg/L, temperature of reaction maintains 25-30 DEG C.
Embodiment 4 one kinds of waste paper pulp-makings manufacture cop tube paper waste water reclamation and utilize treatment process, through efficient anaerobe process, Aerobic biological process, ozone after waste water is first---and biological activated carbon process, micro-filtration and nanofiltration process, the water outlet after process is recycled.
Described efficient anaerobe process refers to: waste water is first through the process of hydrolysis pre-acidified, and utilize hydrolysis anaerobion, remove a part of organic pollutant, the most of hardly degraded organic substance in waste water, through anaerobically fermenting, decomposes and produces CH by water outlet
4bioenergy.Waste water is before the process of hydrolysis pre-acidified, and first through the process of pre-treatment facility, described pre-treatment facility is grid pump well, tiltedly net, settling tank and/or equalizing tank, removes drift suspended substance larger in waste water, reclaims longer fiber, and the regulating water quality water yield.In described grid pump well, interval of grid strip is 18-22mm, and oblique net is 120-140 order; Waste water is when hydrolysis pre-acidified process, and state modulator is: hydraulic detention time is 7h, dissolved oxygen concentration≤0.5mg/L, and temperature of reaction maintains 28 DEG C.
Described Aerobic biological process refers to, in aeration tank, remove majority of organic pollutants in water by means of the absorption of aerobic microbiological, oxidation, Degradation, aeration tank water outlet flows into second pond, the suspended substance in Separation of Water.Described aeration tank dissolved oxygen concentration is 2-4mg/L, and sludge loading is 0.2-0.4kgBOD/ (kgd).Described second pond hydraulic detention time is 1.5-4h, and hydraulic surface loading is 0.6-1.5m
3/ (m
2h).
Described ozone---biological activated carbon process refers to, secondary clarifier effluent enters ozone---biological activated carbon system, utilize the oxidation capacity of ozone by long-chain, larger molecular organics degraded in waste water, utilize the dissolved organic matter in charcoal absorption water, microorganism in enrichment water, and remove suspended substance.Described ozone---biological activated carbon system is made up of ozone contact tower and biological activated carbon filter, and described ozone contact tower is cylinder tower, and its aspect ratio is 6-8, and ozone contact time is 5-10min, and ozone dosage is 0.5-1mg/L; In described biological activated carbon filter, the loading height of gac is 1.5-2m, and packing density is 480-500g/L, and the filtering velocity in filter tank is 8-10m/h, and duration of contact is 10-15min.
Described micro-filtration refers to, is sieved, filters, make it be separated with waste water by the effect of microfiltration membrane equipment to particle, bacterium, colloid.
Described nanofiltration refers to, micro-filtration water outlet enters nano-filtration membrane equipment, the organic macromolecule of the difficult degradation remained in waste water and divalence or polyvalent ion is filtered by the effect of nanofiltration membrane.
Embodiment 5 one kinds of waste paper pulp-makings manufacture cop tube paper waste water reclamation and utilize treatment process, and step is as follows:
(1) efficient anaerobe process
First waste water sequentially through pre-treatment structures such as grid pump wells, tiltedly net, settling tank and equalizing tank, removed drift suspended substance larger in waste water, reclaimed longer fiber, and enter efficient anaerobe treatment system after the regulating water quality water yield.Described efficient anaerobic system forms by being hydrolyzed pre-acidified pond+high efficiency anaerobic reactor.Waste water is first through the process of hydrolysis pre-acidified, utilize hydrolysis anaerobion, the larger molecular organics of difficult degradation in water is decomposed into the small organic molecule of easily degraded, realize broken ring chain rupture, remove a part of organic pollutant, alleviate subsequent biological treatment difficulty, water outlet carries out anaerobically fermenting through anaerobism feed tank pump input high efficiency anaerobic reactor, is decomposed by the biological action of anaerobic granular sludge bed and produces CH by the most of hardly degraded organic substance in waste water
4bioenergy.
In described grid pump well, interval of grid strip is 25mm, and oblique net is 140 orders.
The hydraulic detention time in described hydrolysis pre-acidified pond is 7h, dissolved oxygen concentration≤0.5mg/L.Described high efficiency anaerobic reactor is that the Chinese patent literature of (the Authorization Notice No. CN201882975U(application number 201020655366.X that applicant obtains) that my company manufactures voluntarily discloses a kind of high-effect anaerobic treatment device being applied to commercial pulp pulping wastewater treatment, described high efficiency anaerobic reactor inside is provided with water-distributing device, anaerobism mud discharging device, triphase separator and inner circulating tube, top is provided with gas-liquid separator, outside is provided with external reflux pump, described external reflux pump is connected with high efficiency anaerobic reactor by pipeline, described three separators are divided into, lower two portions), its volumetric loading is 14kgCOD/(m
3d), temperature of reaction maintains 28 DEG C.
(2) Aerobic biological process
Anaerobic effluent enters aerobic treatment system, in aeration tank, remove majority of organic pollutants in water by means of the absorption of aerobic microbiological, oxidation, Degradation.Aeration tank water outlet is from flowing into second pond, the suspended substance in Separation of Water.
Described aerobic treatment system is made up of aeration tank and second pond.Described aeration tank dissolved oxygen concentration is 2.4mg/L, and sludge loading is .0.4kgBOD/ (kgd).Described second pond hydraulic detention time is .4h, and hydraulic surface loading is .1.5m
3/ (m
2h).
(3) ozone---biological activated carbon process
Secondary clarifier effluent enters ozone---biological activated carbon system.Utilize the oxidation capacity of ozone by the long-chains such as the colloid of difficult for biological degradation remaining in waste water and xylogen, larger molecular organics degraded, be translated into less and degradable organism.Self there is the characteristic that hole is many, specific surface area is large, can dissolved organic matter in rapid adsorption water, microorganism that also can be a large amount of in enrichment water.The dissolved organic matter being attracted to activated carbon surface provides nutrition source for microorganism, and in carbon bed, the aerobic bacteria of raised growth breeding and the adsorptive power of gac are carried out water outlet and removed suspended substance through flocculation sedimentation tank simultaneously.
Described ozone---biological activated carbon system is made up of ozone contact tower and biological activated carbon filter.Described ozone contact tower is cylinder tower, and its aspect ratio is 8, and ozone contact time is 10min, and ozone dosage is 0.5mg/L.In described biological activated carbon filter, the loading height of gac is 2m, and packing density is 480g/L, and the filtering velocity in filter tank is 10m/h, and duration of contact is 15min.The gac adopted is the granular carbon that Shanghai Xin Hui gac company limited produces, and particle diameter is 30 orders, specific surface area>=1000m
2/ g, intensity>=95%, iodine number>=1000mg/g.
(4) micro-filtration
Through ozone---the waste water of biological activated carbon process enters microfiltration membrane equipment, is sieved, filters, make it be separated with waste water by the effect of microfiltration membrane to the particle of 0.1 ~ 10 μm of size, bacterium, colloid.
Described microfiltration membrane equipment is that Jiangsu Kaimi Membrane Technology Co., Ltd. produces, and the membrane module adopted is the membrane element that GE company of the U.S. produces, and microfiltration membrane sheet model is JX, and filtering accuracy is 0.3um.
(5) nanofiltration
Micro-filtration water outlet enters nano-filtration membrane equipment, by the effect of nanofiltration membrane by the organic macromolecule of difficult degradation that remains in waste water and divalence or polyvalent ion as Ca
2+, Mg
2+ions etc., the source after process is recycled in paper.
Described nano-filtration membrane equipment is that Hangzhou Saite membrane technique company limited produces, and the membrane module adopted is the membrane element that GE company of the U.S. produces, and nanofiltration membrane sheet model is DK, working pressure 0.9MPa, and filtering accuracy is 0.001 ~ 0.1 um.
Embodiment 6 one kinds of waste paper pulp-makings manufacture cop tube paper waste water reclamation and utilize treatment process, and treatment step is substantially the same manner as Example 5.Unlike: in described grid pump well, interval of grid strip is 20mm, and oblique net is 130 orders.Waste water is when hydrolysis pre-acidified process, and state modulator is: hydraulic detention time is 7h, dissolved oxygen concentration≤0.5mg/L, and temperature of reaction maintains 28 DEG C.Described aeration tank dissolved oxygen concentration is 3mg/L, and sludge loading is 0.3kgBOD/ (kgd).Described second pond hydraulic detention time is 2h, and hydraulic surface loading is 1m
3/ (m
2h).Described ozone contact tower is cylinder tower, and its aspect ratio is 6-8, and ozone contact time is 8min, and ozone dosage is 0.8mg/L; In described biological activated carbon filter, the loading height of gac is 1.8m, and packing density is 490g/L, and the filtering velocity in filter tank is 9m/h, and duration of contact is 13min.The gac adopted is the granular carbon that Shanghai Xin Hui gac company limited produces, and particle diameter is 8 ~ 30 orders, specific surface area>=1000m
2/ g, intensity>=95%, iodine number>=1000mg/g.Described microfiltration membrane equipment is that Jiangsu Kaimi Membrane Technology Co., Ltd. produces, and the membrane module adopted is that GE company of the U.S. produces, and microfiltration membrane sheet model is JX, and filtering accuracy is 0.3um.Described nano-filtration membrane equipment is that Hangzhou Saite membrane technique company limited produces, and the membrane module adopted is that GE company of the U.S. produces, and nanofiltration membrane sheet model is DK, working pressure 0.8MPa, and filtering accuracy is 0.01um.
Test example: utilize embodiment 6 waste paper pulp-making to manufacture cop tube paper waste water reclamation and utilize treatment process process paper plant waste paper pulp-making to manufacture the experimental result of cop tube paper waste water.
Experimental result is as shown in the table:
As can be seen from the above table: after art breading wastepaper pulping and papermaking cop tube paper waste water of the present invention, pollutant removal highly significant, COD clearance is up to 99.1%, desalination rate is up to 95 ~ 98%, turbidity removal rate is 100%, and final outflow water water quality is very good, reaches the requirement of recycle water standard.
Claims (8)
1. waste paper pulp-making manufactures cop tube paper waste water reclamation and utilizes a treatment process, it is characterized in that, through efficient anaerobe process, Aerobic biological process, ozone after waste water is first---biological activated carbon process, micro-filtration and nanofiltration process, and the water outlet after process is recycled; Described efficient anaerobe process refers to: waste water is first through the process of pre-treatment facility, remove drift suspended substance larger in waste water, reclaim longer fiber, and the regulating water quality water yield, again through the process of hydrolysis pre-acidified, utilize hydrolysis anaerobion, remove a part of organic pollutant, most of hardly degraded organic substance in waste water, through anaerobically fermenting, decomposes and produces CH by water outlet
4bioenergy; Waste water is when hydrolysis pre-acidified process, and state modulator is: hydraulic detention time is 6-8h, dissolved oxygen concentration≤0.5mg/L, and temperature of reaction maintains 25-30 DEG C; Described Aerobic biological process refers to: in aeration tank, remove majority of organic pollutants in water by means of the absorption of aerobic microbiological, oxidation, Degradation, aeration tank water outlet flows into second pond, the suspended substance in Separation of Water; Described aeration tank dissolved oxygen concentration is 2-4mg/L, and sludge loading is 0.2-0.4kgBOD/ (kgd); Described second pond hydraulic detention time is 1.5-4h, and hydraulic surface loading is 0.6-1.5m
3/ (m
2h); Described ozone---biological activated carbon process refers to, secondary clarifier effluent enters ozone---biological activated carbon system, utilize the oxidation capacity of ozone by long-chain, larger molecular organics degraded in waste water, utilize the dissolved organic matter in charcoal absorption water, microorganism in enrichment water, and remove suspended substance; At described ozone---in biological activated carbon process, described ozone---biological activated carbon system is made up of ozone contact tower and biological activated carbon filter, described ozone contact tower is cylinder tower, its aspect ratio is 6-8, ozone contact time is 5-10min, and ozone dosage is 0.5-1mg/L; In described biological activated carbon filter, the loading height of gac is 1.5-2m, and packing density is 480-500g/L, and the filtering velocity in filter tank is 8-10m/h, and duration of contact is 10-15min; Described micro-filtration refers to, is sieved, filters, make it be separated with waste water by the effect of microfiltration membrane equipment to particle, bacterium, colloid; In described microfiltration process, described microfiltration membrane equipment is that Jiangsu Kaimi Membrane Technology Co., Ltd. produces, and the membrane module adopted is that GE company of the U.S. produces, and microfiltration membrane sheet model is JX, and filtering accuracy is 0.3um; Described nanofiltration refers to, micro-filtration water outlet enters nano-filtration membrane equipment, the organic macromolecule of the difficult degradation remained in waste water and divalence or polyvalent ion is filtered by the effect of nanofiltration membrane; In described nanofiltration process, described nano-filtration membrane equipment is that Hangzhou Saite membrane technique company limited produces, and the membrane module adopted is that GE company of the U.S. produces, and nanofiltration membrane sheet model is DK, working pressure 0.6-1MPa, and filtering accuracy is 0.001-0.1 um.
2. waste paper pulp-making according to claim 1 manufactures cop tube paper waste water reclamation and utilizes treatment process, it is characterized in that, in described efficient anaerobe process, described pre-treatment facility is grid pump well, tiltedly net, settling tank and/or equalizing tank.
3. manufacture cop tube paper waste water reclamation according to waste paper pulp-making according to claim 2 and utilize treatment process, it is characterized in that, in described grid pump well, interval of grid strip is 15-25mm, and oblique net is 100-150 order.
4. manufacture cop tube paper waste water reclamation according to waste paper pulp-making according to claim 2 and utilize treatment process, it is characterized in that, in described grid pump well, interval of grid strip is 18-22mm, and oblique net is 120-140 order.
5. manufacture cop tube paper waste water reclamation according to waste paper pulp-making according to claim 2 and utilize treatment process, it is characterized in that, in described grid pump well, interval of grid strip is 20mm, and oblique net is 130 orders.
6. manufacture cop tube paper waste water reclamation according to waste paper pulp-making according to claim 1 and utilize treatment process, it is characterized in that, waste water is when hydrolysis pre-acidified process, and state modulator is: hydraulic detention time is 7h, dissolved oxygen concentration≤0.5mg/L, and temperature of reaction maintains 28 DEG C.
7. manufacture cop tube paper waste water reclamation according to waste paper pulp-making according to claim 1 and utilize treatment process, it is characterized in that, described aeration tank dissolved oxygen concentration is 3mg/L, and sludge loading is 0.3kgBOD/ (kgd).
8. manufacture cop tube paper waste water reclamation according to waste paper pulp-making according to claim 1 and utilize treatment process, it is characterized in that, described second pond hydraulic detention time is 2h, and hydraulic surface loading is 1m
3/ (m
2h).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310348609.3A CN103420542B (en) | 2013-08-12 | 2013-08-12 | Wastewater recycling process for waste paper pulping and manufacturing bobbin paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310348609.3A CN103420542B (en) | 2013-08-12 | 2013-08-12 | Wastewater recycling process for waste paper pulping and manufacturing bobbin paper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103420542A CN103420542A (en) | 2013-12-04 |
| CN103420542B true CN103420542B (en) | 2015-05-20 |
Family
ID=49645983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310348609.3A Active CN103420542B (en) | 2013-08-12 | 2013-08-12 | Wastewater recycling process for waste paper pulping and manufacturing bobbin paper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103420542B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103964651A (en) * | 2014-05-26 | 2014-08-06 | 杭州达康环境工程有限公司 | Method for treating and recycling water pollutants of wastepaper papermaking industry |
| CN106186565A (en) * | 2016-08-24 | 2016-12-07 | 丁武龙 | A kind of dyeing waste water zero-emission recycling system and method |
| CN106277616A (en) * | 2016-08-30 | 2017-01-04 | 义乌市义南纸业有限公司 | A kind of waste water treatment process producing cop tube paper |
| CN106904770A (en) * | 2017-05-06 | 2017-06-30 | 湖南恒安生活用纸有限公司 | A kind of papermaking wastewater treatment system and handling process |
| CN114108356B (en) * | 2021-10-21 | 2024-05-24 | 江苏理文造纸有限公司 | Papermaking white water anion garbage recycling process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6146532A (en) * | 1996-04-03 | 2000-11-14 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Process for the biological purification of wastewater |
| CN102010097A (en) * | 2010-10-22 | 2011-04-13 | 蓝星环境工程有限公司 | Method for recycling carbon fiber wastewater |
| CN103145300A (en) * | 2013-03-27 | 2013-06-12 | 四川省水处理及资源化工程技术研究中心 | Sewage treatment system |
-
2013
- 2013-08-12 CN CN201310348609.3A patent/CN103420542B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6146532A (en) * | 1996-04-03 | 2000-11-14 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Process for the biological purification of wastewater |
| CN102010097A (en) * | 2010-10-22 | 2011-04-13 | 蓝星环境工程有限公司 | Method for recycling carbon fiber wastewater |
| CN103145300A (en) * | 2013-03-27 | 2013-06-12 | 四川省水处理及资源化工程技术研究中心 | Sewage treatment system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103420542A (en) | 2013-12-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9771293B2 (en) | Sludge treatment system | |
| CN103420542B (en) | Wastewater recycling process for waste paper pulping and manufacturing bobbin paper | |
| CN102390909B (en) | Method for treating nucleic acid waste water | |
| CN103613241B (en) | A kind of Biodiesel wastewater treatment device | |
| CN206266392U (en) | A kind of papermaking wastewater zero-discharge treatment system | |
| CN101643298A (en) | Organic wastewater treatment process containing membrane filtration element | |
| CN103043789A (en) | Anaerobic reactor and treatment method of cotton pulp production waste water | |
| CN204958671U (en) | Novel printing waste water treatment device | |
| CN102515395A (en) | Method and device for using small-aperture spiral wound ultrafiltration membranes to treat papermaking wastewater | |
| CN107935300B (en) | Process device and method for treating landfill leachate by non-membrane method | |
| CN101948220B (en) | Method for treating printing and dyeing wastewater | |
| CN112028273A (en) | High-recovery-rate reclaimed water recycling advanced treatment system and treatment method | |
| CN111807613A (en) | Tobacco plant slice wastewater treatment process | |
| CN100509661C (en) | Treating technique of polyether polyatomic alcohol producing sewage recovering and utilization | |
| CN203530074U (en) | System for recycling wastewater generated by pulping and preparation of bobbin paper by waste paper | |
| CN205099544U (en) | Food industry sewage treatment system | |
| CN204325085U (en) | A kind for the treatment of system of waste paper deinking waste water | |
| CN211111591U (en) | Advanced treatment system for printing and dyeing wastewater | |
| CN210313900U (en) | Integrated treatment system for semiconductor industrial wastewater | |
| CN203128356U (en) | Wastewater recycling treatment system | |
| CN203392946U (en) | Treatment system for separating clean and turbid printing and dyeing wastewaters and recycling wastewaters | |
| CN102417270A (en) | Printing and dyeing wastewater treatment system | |
| CN201873589U (en) | Advanced treatment and recycle device for papermaking wastewater | |
| CN203079786U (en) | Wastewater zero discharging advanced treatment system | |
| CN212640400U (en) | Biogas desulfurization treatment device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 250000 No. 1602, building 6, Shuntai Plaza, No. 2000, Shunhua Road, high tech Zone, Jinan, Shandong Province Patentee after: SHANDONG LVQUAN ENVIRONMENTAL TECHNOLOGY CO.,LTD. Address before: 250000 No. 1602, building 6, Shuntai Plaza, No. 2000, Shunhua Road, high tech Zone, Jinan, Shandong Province Patentee before: SHANDONG LVQUAN ENVIRONMENTAL ENGINEERING Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| 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 recycling treatment process for waste water from waste paper pulping and manufacturing Bobbin Paper Effective date of registration: 20220224 Granted publication date: 20150520 Pledgee: Ji'nan rural commercial bank Limited by Share Ltd. high tech branch Pledgor: SHANDONG LVQUAN ENVIRONMENTAL TECHNOLOGY CO.,LTD. Registration number: Y2022980001808 |
|
| 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: 20230220 Granted publication date: 20150520 Pledgee: Ji'nan rural commercial bank Limited by Share Ltd. high tech branch Pledgor: SHANDONG LVQUAN ENVIRONMENTAL TECHNOLOGY CO.,LTD. Registration number: Y2022980001808 |
|
| 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 Process for Recycling and Reusing Wastewater from Waste Paper Pulping and Manufacturing Tube Paper Effective date of registration: 20230419 Granted publication date: 20150520 Pledgee: Ji'nan rural commercial bank Limited by Share Ltd. high tech branch Pledgor: SHANDONG LVQUAN ENVIRONMENTAL TECHNOLOGY CO.,LTD. Registration number: Y2023980038466 |