CN1417143A - Method for treating ABS sewage - Google Patents
Method for treating ABS sewage Download PDFInfo
- Publication number
- CN1417143A CN1417143A CN 01134725 CN01134725A CN1417143A CN 1417143 A CN1417143 A CN 1417143A CN 01134725 CN01134725 CN 01134725 CN 01134725 A CN01134725 A CN 01134725A CN 1417143 A CN1417143 A CN 1417143A
- Authority
- CN
- China
- Prior art keywords
- sewage
- abs
- polyacrylamide
- mechanical stirring
- under mechanical
- 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.)
- Granted
Links
- 239000010865 sewage Substances 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000002156 mixing Methods 0.000 claims abstract description 28
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 23
- 238000005189 flocculation Methods 0.000 claims abstract description 21
- 230000016615 flocculation Effects 0.000 claims abstract description 21
- 238000010907 mechanical stirring Methods 0.000 claims abstract description 15
- 239000013049 sediment Substances 0.000 claims abstract description 11
- 238000000926 separation method Methods 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 239000007787 solid Substances 0.000 claims abstract description 5
- 238000004064 recycling Methods 0.000 claims abstract description 4
- 238000004062 sedimentation Methods 0.000 claims abstract description 4
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminum chloride Substances Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 21
- -1 aluminum chloride hydrocarbon Chemical class 0.000 claims description 18
- 239000004215 Carbon black (E152) Substances 0.000 claims description 17
- 229930195733 hydrocarbon Natural products 0.000 claims description 17
- 239000002253 acid Substances 0.000 claims description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 5
- 239000011707 mineral Substances 0.000 claims description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 3
- 238000004581 coalescence Methods 0.000 claims description 3
- 229910017604 nitric acid Inorganic materials 0.000 claims description 3
- 238000007599 discharging Methods 0.000 abstract description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract 3
- 150000007522 mineralic acids Chemical class 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 23
- 239000003795 chemical substances by application Substances 0.000 description 9
- 238000005352 clarification Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 3
- 230000003311 flocculating effect Effects 0.000 description 2
- 239000004816 latex Substances 0.000 description 2
- 229920000126 latex Polymers 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000006124 Pilkington process Methods 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229920000592 inorganic polymer Polymers 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
A method for treating ABS sewage comprises the following steps: adjusting the pH value of the sewage from an ABS production device to 6-8 by using inorganic acid under mechanical stirring; adding basic polyaluminium chloride, and fully mixing under mechanical stirring, wherein the addition amount of the basic polyaluminium chloride is as follows by weight: the ratio of the ABS sewage to the basic polyaluminium chloride is 10000: 0.5-2; adding polyacrylamide, and fully mixing under mechanical stirring, wherein the adding amount of the polyacrylamide is as follows by weight: ABS sewage and polyacrylamide are 300000: 0.5-2; standing the ABS sewage to form two phases of water and sediment, and directly discharging the water phase into a subsequent sewage treatment field; and (4) carrying out solid-liquid separation on the sediment, returning the separated liquid to the pH value adjusting process for recycling treatment, and recovering the solid matters. The invention adopts twice flocculation and sedimentation separation processes, can effectively remove the SS content in the ABS sewage, and improves the biodegradability of the ABS sewage.
Description
Technical field
The present invention relates to a kind of method of the ABS of processing sewage, specifically a kind of ABS sewage is carried out pretreated method, belong to the suspended impurity in the sewage is flocculated and sedimentary method.
Background technology
At Sodium dodecylbenzene sulfonate also is in the ABS production process, produces a large amount of industrial sewages, contains very high suspended substance (SS) in these sewage, and SS content can reach 8000gm/L generally at 1000～3000mg/L.As directly being discharged into wastewater treatment field, will bring difficulty to follow-up sewage disposal, therefore need carry out pre-treatment.Because ABS sewage mostly is the waste water of emulsification shape, and the water quality complexity, contains materials such as nitrile compound, butadiene-styrene latex, AS low-molecular-weight resin, ABS powder, ABS latex in the waste water, difficulty of governance is big.In the prior art, adopt coagulation-air-float method to carry out pre-treatment to ABS sewage more, but treatment effect is all undesirable, the SS clearance has only about 60%, constitute a serious difficulty still for the sewage disposal in follow-up sewage-farm, influence the biochemical treatment effect, cause the final discharging of sewage defective, SS severe overweight in the sewage directly influences the ordinary production of ABS device and the normal operation in sewage-farm.Chinese patent 99102881.3 discloses a kind of polymeric aluminum and polyacrylamide compounded efficient flocculant and preparation method thereof, this flocculation agent is a raw material with polymerize aluminum chloride, polyacrylamide and derivative thereof, the polymerize aluminum chloride and the polyacrylamide or derivatives thereof that will have certain basicity are compound by a certain percentage, stir promptly through Hybrid Heating.This flocculation agent charge neutrality ability is strong, has higher crane span structure effect, and synthesis step is simple, and is easy to operate, and raw material sources are abundant.But this disclosure of the Invention is a kind of flocculation agent, does not adopt this method to the sewage method handled of ABS sewage particularly and specify.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can effectively remove SS content in the ABS sewage, improve the method for processing ABS sewage of the biodegradability of ABS sewage, with the ordinary production that guarantees the ABS device and the normal operation in sewage-farm.
The objective of the invention is to realize by following technical solution.
A kind of method of handling ABS sewage comprises flocculation, sedimentation, and it adopts following treating processes:
1) will regulate its pH value with mineral acid from the sewage of ABS production equipment under mechanical stirring, the pH value that makes the ABS sewage after the adjusting is between 6～8;
2) in ABS sewage, add aluminum chloride hydrocarbon complex, thorough mixing under mechanical stirring, the add-on of aluminum chloride hydrocarbon complex is by weight: ABS sewage: aluminum chloride hydrocarbon complex=10000: 0.5～2;
3) in ABS sewage, add polyacrylamide, thorough mixing under mechanical stirring, the add-on of polyacrylamide is by weight: ABS sewage: polyacrylamide=300000: 0.5～2;
4) ABS sewage is left standstill, sediment is finished coalescence, layering, forms water and throw out two-phase, and water directly discharges the biochemical device that enters follow-up sewage-farm;
5) sediment is carried out solid-liquid separation, parting liquid returns pH value and regulates the operation recycling processing, and solid matter is recovered.
Described mineral acid is any one in sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid or other the inorganic middle strong acid.
Described aluminum chloride hydrocarbon complex under mechanical stirring with ABS sewage thorough mixing, its mixing speed is 80～400r/min.
Described polyacrylamide under mechanical stirring with ABS sewage thorough mixing, its mixing speed is 60～150r/min.
The time that described ABS sewage leaves standstill is 0.5～3 hour.
Described solid-liquid separation adopts separating centrifuge to carry out, and the separation rotating speed of separating centrifuge is 1000～3000r/min.
The present invention has at first considered the prerequisite of flocculation, i.e. the pH value of sewage, and by the flocculation principle as can be known, certain pH value condition is very big to the influence of flocculating effect, and suitable PH condition can reduce the flocculation agent consumption, improves flocculating effect.The present invention select inorganic in strong acid, with pH value be adjusted to optimum flocculation 6～8 between.The present invention is used in combination the inorganic polymer flocculant aluminum chloride hydrocarbon complex with the organic polymer coargulator polyacrylamide, both add respectively and with ABS sewage thorough mixing, so that give full play to advantage separately, make small colloidal solid and suspended particle, under the bridging action of flocculation agent and its polar material and electrolytical effect, in and the particle surface electric charge, reduce or the elimination particle between repulsive force, gather together, it is big that volume constantly becomes.When the particle aggregation volume acquires a certain degree, just from water, separate, form flocs unit.Flocs unit after twice flocculation forms big granule, has good sedimentation, separation performance.
The advantage that the present invention is compared with prior art had is: the inventive method can effectively be removed SS content in the ABS sewage, makes that the SS more than 90% is removed in the sewage; Improved the biodegradability of ABS sewage, experimental results show that the Biodegradability of Wastewater that adopts after the inventive method is handled can reach more than 80%, has effectively guaranteed the ordinary production of ABS device and the normal operation in sewage-farm.Owing to before sewage is carried out flocculation treatment, at first its pH value is regulated, reduce the flocculation agent consumption, and can after processing, reclaim useful solid materials, resource is fully utilized.In addition, the inventive method does not need two kinds of flocculation agents are carried out in advance synthetic the processing, and the entire treatment process carries out under normal temperature, normal pressure, and technological process is simple, and easy handling does not have particular requirement to equipment.
Description of drawings
Accompanying drawing is a kind of process flow sheet of handling the method for ABS sewage of the present invention.
Concrete enforcement
Below in conjunction with accompanying drawing the present invention is described in detail.
The sewage that comes from the ABS device will be sent into PH equalizing tank (1), under churned mechanically situation, carry out PH with mineral acid and regulate, pH value will be adjusted between 6～8 from acid accumulator storage (2); ABS sewage after regulating is sent into first flocculation basin (3), under mechanical stirring, carry out thorough mixing with aluminum chloride hydrocarbon complex from flocculation agent storage tank (4), the add-on of aluminum chloride hydrocarbon complex is by weight: ABS sewage: aluminum chloride hydrocarbon complex=10000: 0.5～2, mixing speed are 80r～400/min; ABS sewage after the flocculation is for the first time sent into second flocculation basin (5), mix under mechanical stirring with polyacrylamide from flocculation agent storage tank (6), the add-on of polyacrylamide is by weight: ABS sewage: polyacrylamide=300000: 0.5～2, mixing speed are 60～150r/min; ABS sewage after the flocculation is for the second time sent into settling pond (7) left standstill 0.5～3 hour, sediment is finished coalescence, layering, forms water and throw out two-phase in the clarifying chamber.By being arranged on the outlet of settling pond (7) different heights, the realization two-phase is separated automatically, and water directly discharges the biochemical device that enters follow-up sewage-farm and carries out biochemical treatment, and sediment enters sediment groove (8); Sediment in the sediment groove (8) is sent into separating centrifuge (9) carry out solid-liquid separation, the separation rotating speed of separating centrifuge is 1000～3000r/min, and parting liquid returns equalizing tank (1) and carries out recycling processing, and solid matter is recovered.The entire treatment process is carried out under temperature is 20～40 ℃, normal pressure situation,
To adopt the inventive method that ABS sewage is tried out the specific embodiment of processing, the present invention is done further introduction below.
Embodiment 1:
Get ABS sewage 6L, with sulfuric acid the pH value of ABS sewage is adjusted to 6.8 by 8.6, the aluminum chloride hydrocarbon complex add-on is 15ml (4%), mixing speed is 260r/min, the polyacrylamide add-on is 1.9ml (1%), mixing speed is 80r/min, and the clarification disengaging time is 40 minutes, and the entire treatment process is carried out under temperature is about 32 ℃, normal pressure situation.Forward and backward SS content of sewage disposal and processing back SS clearance see Table 1.
Embodiment 2:
Get ABS sewage 6.5L, with hydrochloric acid the pH value of ABS sewage is adjusted to 7.1 by 9.2, the aluminum chloride hydrocarbon complex add-on is 14ml (4%), mixing speed is 280r/min, the polyacrylamide add-on is 1.7ml (1%), and mixing speed is 100r/min, and the clarification disengaging time is 1 hour, treating processes is to be about 28 ℃ in temperature, carries out under the normal pressure situation.Forward and backward SS content of ABS sewage disposal and processing back SS clearance see Table 1.
Embodiment 3:
Get ABS sewage 6L, with nitric acid the pH value of ABS sewage is adjusted to 7.6 by 8.4, the aluminum chloride hydrocarbon complex add-on is 24ml (2.4%), mixing speed is 270r/min, the polyacrylamide add-on is 1.5ml (1%), and mixing speed is 90r/min, and the clarification disengaging time is 1.5 hours, treating processes is to be about 30 ℃ in temperature, carries out under the normal pressure situation.Forward and backward SS content of ABS sewage disposal and processing back SS clearance see Table 1.
Embodiment 4:
Get ABS sewage 6L, with phosphoric acid the pH value of ABS sewage is adjusted to 6.8 by 8.9, the aluminum chloride hydrocarbon complex add-on is 23ml (2.4%), mixing speed is 290r/min, the polyacrylamide add-on is 2ml (1%), and mixing speed is 120r/min, and the clarification disengaging time is 1 hour, treating processes is to be about 27 ℃ in temperature, carries out under the normal pressure situation.Forward and backward SS content of ABS sewage disposal and processing back SS clearance see Table 1.
Embodiment 5:
Getting ABS sewage is 6.2L, with sulfuric acid the pH value of ABS sewage is adjusted to 6.9 by 8.5, the aluminum chloride hydrocarbon complex add-on is 15ml (4%), mixing speed is 230r/min, the polyacrylamide add-on is 2ml (1%), and mixing speed is 70r/min, and the clarification disengaging time is 2 hours, treating processes is to be about 26 ℃ in temperature, carries out under the normal pressure situation.Forward and backward SS content of ABS sewage disposal and processing back SS clearance see Table 1.
Forward and backward SS content of table 1:ABS sewage disposal and processing back SS clearance
| SS mg/L before handling | Handle back SS mg/L | SS clearance % | |
| Embodiment 1 | ????1116. | ????76.8 | ????93.2 |
| Embodiment 2 | ????9116 | ????412 | ????95.5 |
| Embodiment 3 | ????432.4 | ????6.0 | ????98 |
| Embodiment 4 | ????2024.4 | ????67.6 | ????96.6 |
| Embodiment 5 | ????6407.5 | ????81.7 | ????98.7 |
| Average removal rate | ????96.4 |
ABS sewage after above-mentioned employing the inventive method processing is carried out biochemical treatment, and its result shows that the ABS Biodegradability of Wastewater after the processing reaches more than 80%.
Claims (6)
1. a method of handling ABS sewage comprises flocculation, sedimentation, it is characterized in that it adopts following treating processes:
1) will regulate its pH value with mineral acid from the sewage of ABS production equipment under mechanical stirring, the pH value that makes the ABS sewage after the adjusting is between 6～8;
2) in ABS sewage, add aluminum chloride hydrocarbon complex, thorough mixing under mechanical stirring, the add-on of aluminum chloride hydrocarbon complex is by weight: ABS sewage: aluminum chloride hydrocarbon complex=10000: 0.5～2;
3) in ABS sewage, add polyacrylamide, thorough mixing under mechanical stirring, the add-on of polyacrylamide is by weight: ABS sewage: polyacrylamide=300000: 0.5～2;
4) ABS sewage is left standstill, sediment is finished coalescence, layering, forms water and throw out two-phase, and water directly discharges the biochemical device that enters follow-up sewage-farm;
5) sediment is carried out solid-liquid separation, parting liquid returns pH value and regulates the operation recycling processing, and solid matter is recovered.
2. method according to claim 1 is characterized in that: described mineral acid is any one in sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid or other the inorganic middle strong acid.
3. method according to claim 1 is characterized in that: described aluminum chloride hydrocarbon complex under mechanical stirring with ABS sewage thorough mixing, its mixing speed is 80～400r/min.
4. method according to claim 1 is characterized in that: described polyacrylamide under mechanical stirring with ABS sewage thorough mixing, its mixing speed is 60～150r/min.
5. method according to claim 1 is characterized in that: the time that described ABS sewage leaves standstill is 0.5～3 hour.
6. method according to claim 1 is characterized in that: described solid-liquid separation adopts separating centrifuge to carry out, and the separation rotating speed of separating centrifuge is 1000～3000r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01134725 CN1205137C (en) | 2001-11-09 | 2001-11-09 | Method for treating ABS sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01134725 CN1205137C (en) | 2001-11-09 | 2001-11-09 | Method for treating ABS sewage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1417143A true CN1417143A (en) | 2003-05-14 |
| CN1205137C CN1205137C (en) | 2005-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01134725 Expired - Fee Related CN1205137C (en) | 2001-11-09 | 2001-11-09 | Method for treating ABS sewage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1205137C (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102092890A (en) * | 2010-06-08 | 2011-06-15 | 中国环境科学研究院 | Method for treating waste water in ABS (Acrylonitrile Butadiene Styrene) coagulation and drying procedure |
| CN102101739A (en) * | 2010-08-11 | 2011-06-22 | 中国环境科学研究院 | Method for treating ABS (acrylonitrile-butadiene-styrenecopolymer) resin production wastewater |
| CN102249931A (en) * | 2011-05-17 | 2011-11-23 | 兰州交通大学 | Method for synthesizing 3,3'-dimethyl-4,4'-diamidodiphenylmethane |
| CN102249930A (en) * | 2011-05-17 | 2011-11-23 | 兰州交通大学 | Method for synthesizing 3,3',5,5'-dimethyl-4,4'-diaminodiphenylmethane |
| CN102464425A (en) * | 2010-11-05 | 2012-05-23 | 天津滨海鼎昇环保科技工程有限公司 | Two-stage coagulation and biological co-processing technology of PVC acid-alkali wastewater |
| CN102531742A (en) * | 2010-12-31 | 2012-07-04 | 郭宗华 | Liquid fertilizer and preparation method thereof |
| CN103663630A (en) * | 2012-09-10 | 2014-03-26 | 中国石油化工股份有限公司 | Method for electrolysis treatment of acrylonitrile wastewater |
| CN103693820A (en) * | 2014-01-02 | 2014-04-02 | 中国矿业大学(北京) | ABS (Acrylonitrile Butadiene Styrene) resin production wastewater pretreatment method |
| CN105731739A (en) * | 2016-05-07 | 2016-07-06 | 长春工业大学 | Comprehensive treatment method for wastewater generated by ABS resin production |
| CN109351703A (en) * | 2018-10-25 | 2019-02-19 | 湖北金洋资源股份公司 | A kind of waste metal cleaning method |
| CN109433718A (en) * | 2018-10-25 | 2019-03-08 | 湖北金洋资源股份公司 | A kind of cleaning process of metalwork containing greasy dirt |
| CN113429087A (en) * | 2021-08-09 | 2021-09-24 | 江苏南大华兴环保科技股份公司 | Method for treating perfume oil-containing wastewater by activated sludge-biofilm symbiotic system |
-
2001
- 2001-11-09 CN CN 01134725 patent/CN1205137C/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102092890A (en) * | 2010-06-08 | 2011-06-15 | 中国环境科学研究院 | Method for treating waste water in ABS (Acrylonitrile Butadiene Styrene) coagulation and drying procedure |
| CN102101739B (en) * | 2010-08-11 | 2012-08-29 | 中国环境科学研究院 | Method for treating ABS (acrylonitrile-butadiene-styrenecopolymer) resin production wastewater |
| CN102101739A (en) * | 2010-08-11 | 2011-06-22 | 中国环境科学研究院 | Method for treating ABS (acrylonitrile-butadiene-styrenecopolymer) resin production wastewater |
| CN102464425B (en) * | 2010-11-05 | 2013-07-24 | 天津滨海鼎昇环保科技工程有限公司 | Two-stage coagulation and biological co-processing technology of PVC acid-alkali wastewater |
| CN102464425A (en) * | 2010-11-05 | 2012-05-23 | 天津滨海鼎昇环保科技工程有限公司 | Two-stage coagulation and biological co-processing technology of PVC acid-alkali wastewater |
| CN102531742B (en) * | 2010-12-31 | 2014-04-16 | 郭宗华 | Liquid fertilizer and preparation method thereof |
| CN102531742A (en) * | 2010-12-31 | 2012-07-04 | 郭宗华 | Liquid fertilizer and preparation method thereof |
| CN102249930A (en) * | 2011-05-17 | 2011-11-23 | 兰州交通大学 | Method for synthesizing 3,3',5,5'-dimethyl-4,4'-diaminodiphenylmethane |
| CN102249930B (en) * | 2011-05-17 | 2013-10-23 | 兰州交通大学 | Method for synthesizing 3,3',5,5'-dimethyl-4,4'-diaminodiphenylmethane |
| CN102249931B (en) * | 2011-05-17 | 2013-10-23 | 兰州交通大学 | Method for synthesizing 3,3'-dimethyl-4,4'-diamidodiphenylmethane |
| CN102249931A (en) * | 2011-05-17 | 2011-11-23 | 兰州交通大学 | Method for synthesizing 3,3'-dimethyl-4,4'-diamidodiphenylmethane |
| CN103663630A (en) * | 2012-09-10 | 2014-03-26 | 中国石油化工股份有限公司 | Method for electrolysis treatment of acrylonitrile wastewater |
| CN103663630B (en) * | 2012-09-10 | 2015-09-16 | 中国石油化工股份有限公司 | A kind of acrylic nitrile waste water electrolytic processing method |
| CN103693820A (en) * | 2014-01-02 | 2014-04-02 | 中国矿业大学(北京) | ABS (Acrylonitrile Butadiene Styrene) resin production wastewater pretreatment method |
| CN105731739A (en) * | 2016-05-07 | 2016-07-06 | 长春工业大学 | Comprehensive treatment method for wastewater generated by ABS resin production |
| CN109351703A (en) * | 2018-10-25 | 2019-02-19 | 湖北金洋资源股份公司 | A kind of waste metal cleaning method |
| CN109433718A (en) * | 2018-10-25 | 2019-03-08 | 湖北金洋资源股份公司 | A kind of cleaning process of metalwork containing greasy dirt |
| CN113429087A (en) * | 2021-08-09 | 2021-09-24 | 江苏南大华兴环保科技股份公司 | Method for treating perfume oil-containing wastewater by activated sludge-biofilm symbiotic system |
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| Publication number | Publication date |
|---|---|
| CN1205137C (en) | 2005-06-08 |
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