CN102464403A - Granular carrier for wastewater processing, preparation method thereof and preparation device thereof - Google Patents
Granular carrier for wastewater processing, preparation method thereof and preparation device thereof Download PDFInfo
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- CN102464403A CN102464403A CN201010538792XA CN201010538792A CN102464403A CN 102464403 A CN102464403 A CN 102464403A CN 201010538792X A CN201010538792X A CN 201010538792XA CN 201010538792 A CN201010538792 A CN 201010538792A CN 102464403 A CN102464403 A CN 102464403A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/002—Methods
- B29B7/007—Methods for continuous mixing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
- B29B7/7466—Combinations of similar mixers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
- B29B7/7476—Systems, i.e. flow charts or diagrams; Plants
- B29B7/748—Plants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/82—Heating or cooling
- B29B7/826—Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/12—Making granules characterised by structure or composition
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Biological Treatment Of Waste Water (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses a granular carrier for wastewater processing, a preparation method thereof and a preparation device thereof. The carrier is prepared from 50-70 parts by weight of waste polyethylene, 10-30 parts by weight of permutite and 5-15 parts of powdery active carbon. Compared with the prior art, the method of the invention, which treats the highly economic waste polyethylene as a main raw material, allows the waste polyethylene processing cost to be reduced, pollution problems caused by the waste polyethylene to be solved, the carrier of various sizes to be prepared and the large batch production to be realized, and the obtained granular carrier which has the advantages of large surface area and good adsorption to microbes allows various microbes to be effectively adsorbed and effectively grow, has good fluidity with the water flow and has no stagnation phenomena. According to the granular carrier of the invention, the high speed wastewater processing becomes possible; and compared with present wastewater processing methods, the granular carrier has the advantages of rapid processing speed, high efficiency and good effect. The carrier of the invention is also suitable for processing high concentration wastewater containing nutritive salts and difficult decomposition organic matters, domestic sewage, municipal sewage and the like.
Description
Technical field:
Granular carrier of the adsorbable and growth of the microbial bacteria that uses when the present invention relates to a kind of waste water and handling with the biology mode and preparation method thereof and device belong to water-treatment technology field.
Background technology:
In recent years eutrophication (eutrophication) phenomenon that becomes the blockade waters such as lake water field, bank of social concern is that the excessive inflow of nitrogen, phosphorus compound takes place; Phosphorus in the water and nitrogen compound itself are exactly pollutent; It is the major cause that the forfeiture water resources is worth; Also be the necessary nutrition of algae reproduction, water quality is worsened more.The untreated water of nitrogenous and phosphorus flow into the rivers and creeks with in the sea after, in summer various spinoffs can take place particularly, wherein fish and shellfish is had the green alga and the red algae of fatal influence because nitrogen and phosphorus too much inflow cause.And after the processing standard of the plant effluent that the sewage of discharging in our daily life, factory discharge was strengthened, the sewage work that existing removal with organism (BOD), suspended substance (SS) is the master all need solve the depths reason technical problem of removing phosphorus and nitrogen.
The removal method of phosphorus and nitrogen has physico-chemical process and biological processes method in the known wastewater treatment, but the processing costs of physical chemistry treatment process is high and in operation, also have the height technical matters.The biological processes method is: during polluted by nitrogen, with the nitronic acid mikrobe, after the nitronic acidization, nitronic acid salt is reduced into nitrogen and removal at anaerobic state with denitrification microorganism through denitrification process under aerobic condition; If phosphorus pollutes, under anaerobic state, add entry and contact removal phosphorus in back with mikrobe, under aerobic condition, from sewage, remove phosphorus then with the method for the excessive absorption phosphorus of mikrobe.Though the biological processes method is utilized most of planktonic organism; But exist along with the stirring of sewage and move and cause the loss of microbial bacterial and the decomposition of nitrogen; The slack-off impact load of the propagation of bacterium is problem such as sensitivity very; For addressing this problem, the sewage disposal technology that the suitable material of the easier absorption growth of utilization prepares the big or small carrier of difference is just in R and D.
The mikrobe contact material that previous WWT is used is main raw material with plastic waste; Pulverize after mixing subsidiary material such as stone flour, activated carbon, filter sand on this basis; At high temperature handle the back fusion and form bulk, and the carbonization impurity directly extrudes cooling formation mikrobe contact carrier.But should adopt useless grog by the technology main raw; The course of processing directly extrudes after with high-temperature fusion; So inside does not generate pore when finally extruding, the surface also is too lubricated for mikrobe absorption forms the mikrobe layer, the little and problem that also has mikrobe to break away from microorganism growth space; Also have the too much in use cracked easily of stone flour and activated carbon and need multiple auxilliary material, loaded down with trivial details problems such as formation speed is low when continuously extruded, productivity is low.
In the prior art for addressing the above problem; Polyuridylic acid(Poly(U)) ethane and polyuridylic acid(Poly(U)) ethane with pulverizing are waste materials; And form the mikrobe contact carrier with raw material extruding such as promoting flyash that the microorganism active effect is high and carbon dust, soil, paddy rice skin, and its global tissue is fluffy, and gas porosity is high; Surfaces externally and internally is very coarse, has mikrobe not allow caducous advantage.But the size of made carrier is balanced, has the shortcoming of polytype attached growth of microorganisms difficulty, and proportion will suspend in below the 1 as sudden and violent gas of input pond, along with the mobile defective that loss is arranged of water.
Summary of the invention:
The objective of the invention is to: a kind of granular carrier that is used for wastewater treatment and preparation method thereof and device are provided.The present invention is a main raw material with the high waste polyethylene of economy, and the carrier that can prepare all size also can be produced in enormous quantities, and the mikrobe absorption when purifying waste water processing of gained granular carrier is good, does not have stagnation behavior well with flow property.
Technical scheme of the present invention: a kind of granular carrier that is used for wastewater treatment, according to listed as parts by weight, it is processed for 5～15 parts with 50～70 parts of waste polyethylenes, 10～30 parts of zeolites and powder activated carbon; Preferably process for 10 parts with 60 parts of waste polyethylenes, 20 parts of zeolites and powder activated carbon.
The diameter of said granular carrier is 5～10mm.
The preparation method that the above is used for the granular carrier of wastewater treatment may further comprise the steps:
(a) raw material stirring is mixed: waste polyethylene, zeolite and powder activated carbon are mixed process mixture;
(b) the mixture fusion is extruded;
(c) extrusion molding: cut into particulate state after the mixture fusion with the fusion extrusion;
(d) high speed dewatering: with the high speed dewatering device water and carrier separating;
(e) with the particulate vector metering packing of processing.
Raw material mixed 30～60 minutes with the rotating speed of 75～80rpm in the abovementioned steps (a).
Melt temperature when fusion extrudes in the abovementioned steps (b) is 200～250 ℃, and extruder pressure is 0.2～0.4kgf/cm
2
Temperature in the abovementioned steps (c) during extrusion molding is 230～280 ℃, and pressure is 0.3～0.5kgf/cm
2With the water of 10～16 ℃ of water-jet exhauster (5) injections, make carrier extremely speed cooling when cutting of moulding in the time of cutting, prevent its mutual stickup.
The rotating speed of abovementioned steps (d) high speed water trap is 1500～1600rpm.
The preparation facilities that is used for the granular carrier of wastewater treatment according to the invention; Comprise whisking appliance, fusion tube machine, single-lead-screw extruding briquetting machine, carrier transfer lime, high speed dewatering device and metering packing device; The discharge port of whisking appliance is connected with the opening for feed of fusion tube machine; The discharge port of fusion tube machine is corresponding with the opening for feed of single-lead-screw extruding briquetting machine or be connected; The discharge port of single-lead-screw extruding briquetting machine links to each other with the high speed dewatering device through the carrier transfer lime, and the high speed dewatering device links to each other with the metering packing device through the carrier transfer lime.
Be provided with well heater in the fusion tube machine and carry dark wheel, be provided with well heater in the single-lead-screw extruding briquetting machine, carry dark wheel and former.
The top of former also is provided with water-jet exhauster.
Between carrier transfer lime and the metering packing device carrier storage compartment can be set.
The prepared particulate vector diameter of the present invention is 5～10mm, and true specific gravity is 1～1.19, and table proportion is 0.45～0.60kg/L, has the superperformance of multiple type attached growth of microorganisms.
Compared with prior art; The present invention is the granular carrier that main raw material prepares the adsorbable and growth of the microbial bacteria that uses when handling waste water with the biology mode with the high waste polyethylene of economy; Reduce the processing costs of waste polyethylene and solved the pollution problem that waste polyethylene causes; The carrier that can prepare all size also can be produced in enormous quantities, and the surface-area of gained granular carrier is big, and mikrobe absorption is good; Can more effectively let multiple type mikrobe absorption grow, not have stagnation behavior well with flow property.Because carrier of the present invention has very big surface-area, make the high speed processing of waste water become possibility, faster than existing method of wastewater treatment processing speed, efficient is high and effective.Carrier of the present invention also is applicable to the processing of the high-concentration waste water that contains nutrient salts and hard-decomposed organic and sewage, municipal effluent etc.
Description of drawings:
Fig. 1 is preparation technology's schema of the present invention's granular carrier of being used for wastewater treatment;
Fig. 2 is the preparation facilities synoptic diagram of the embodiment of the invention 1 granular carrier that is used for wastewater treatment.
Embodiment:
Embodiment 1: the preparing method's (the used device of preparation process is seen Fig. 2) who is used for the granular carrier of wastewater treatment: take by weighing 60 parts of waste polyethylenes, 20 parts of zeolites and 10 parts of powder activated carbons by weight and put into whisking appliance 1; Rotating speed with 80rpm mixed 30 minutes; Mixture gets in the fusion tube machine 4; Be heated to 250 ℃ by well heater 2, at 0.2kgf/cm
2Fusion extrudes under the pressure, and the mixture that fusion extrudes gets in the single-lead-screw extruding briquetting machine 7, is heated to 280 ℃ by well heater 2, after the fusion at 0.5kgf/cm
2Pressure under extrusion molding, (diameter is prone to stop up less than the words of 5mm and is installed in intermittently sudden and violent gas pond and sedimentary and causes toward the underfed in sudden and violent gas pond at a distance from the micropore of deleting, and sudden and violent gas pond has mud spillover outward to be cut into diameter 5～10mm with former 6 again; Diameter during greater than 10mm when quick-fried gas flowing of carrier just need a large amount of energy and flow range little, can let carrier be stacked into ground) particulate state.For increasing the surface-area of carrier, the water that sprays 10 ℃ with water-jet exhauster 5 in the time of cutting makes the carrier cool quickly of moulding, prevents its mutual stickup.Be transplanted in the high speed dewatering device 9 through carrier transfer lime 8 with water blended carrier then, water removed with the rotating speed of 1500rpm.Carrier after the dehydration carries out quantitative package with metering wrapper 11 after being transplanted on carrier storage compartment 10 by carrier transfer lime 8 earlier again.
Prepared granular carrier true specific gravity is 1.09, and table proportion is 0.46kg/L.
Embodiment 2: take by weighing 55 parts of waste polyethylenes, 30 parts of zeolites and 15 parts of powder activated carbons by weight and put into whisking appliance 1, mixed 60 minutes with the rotating speed of 75rpm, mixture gets in the fusion tube machine 4, is heated to 200 ℃ by well heater 2, at 0.4kgf/cm
2Fusion extrudes under the pressure, and the mixture that fusion extrudes gets in the single-lead-screw extruding briquetting machine 7, is heated to 230 ℃ by well heater 2, after the fusion at 0.4kgf/cm
2Pressure under extrusion molding, be cut into the particulate state of diameter 8mm again with former 6.For increasing the surface-area of carrier, the water that sprays 16 ℃ with water-jet exhauster 5 in the time of cutting makes the carrier cool quickly of moulding, prevents its mutual stickup.Be transplanted in the high speed dewatering device 9 through carrier transfer lime 8 with water blended carrier then, water removed with the rotating speed of 1600rpm.Carrier after the dehydration is transplanted on metering packing device 11 through carrier transfer lime 8 and carries out quantitative package.
Prepared granular carrier true specific gravity is 1.19, and table proportion is 0.49kg/L.
Embodiment 3: take by weighing 70 parts of waste polyethylenes, 15 parts of zeolites and 5 parts of powder activated carbons by weight and put into whisking appliance 1, mixed 45 minutes with the rotating speed of 78rpm, mixture gets in the fusion tube machine 4, is heated to 230 ℃ by well heater 2, at 0.3kgf/cm
2Fusion extrudes under the pressure, and the mixture that fusion extrudes gets in the single-lead-screw extruding briquetting machine 7, is heated to 250 ℃ by well heater 2, after the fusion at 0.3kgf/cm
2Pressure under extrusion molding, be cut into the particulate state of diameter 10mm again with former 6.For increasing the surface-area of carrier, the water that sprays 14 ℃ with water-jet exhauster 5 in the time of cutting makes the carrier cool quickly of moulding, prevents its mutual stickup.Be transplanted in the high speed dewatering device 9 through carrier transfer lime 8 with water blended carrier then, water removed with the rotating speed of 1550rpm.Carrier after the dehydration carries out quantitative package with metering wrapper 11 after being transplanted on carrier storage compartment 10 by carrier transfer lime 8 earlier again.
The true specific gravity of prepared granular carrier is 1.14, and table proportion is 0.50kg/L.
Experimental example: each granular carrier that the foregoing description 1～3 is made possesses the water quality that adopts aftertreatment water under the condition of enumerating like table 1 in the water treatment system of anaerobic pond and intermittently sudden and violent gas pond and settling tank and contrasts down with the similarity condition that does not use particulate vector and distinguish the experiment that compares actual.
Table 1 carrier applicable elements
| Project | Anaerobic pond | Intermittently sudden and violent gas pond | Settling tank |
| The residence time (hr) | 1.5 | 6 | 3 |
| The carrier loading level | - | 12 | 6 |
| Easily | 15 | 60 | 30 |
Adopt water pollution technological experiment method to measure COD (COD) in the experimentation, BOD (BOD), the concentration of total nitrogen (T-N) draws the clearance to source water, and the comparative analysis result sees the following form 2.
Table 2 clearance (%)
* ± be standard deviation, when Mn embodies the COD concentration determination with oxygenant (Mn).
Visible by above-mentioned table 2, the district compares with contrast, and the clearance of the COD (CODMn) of the embodiment of the invention 1～3 of use carrier is all more than 80%, and the clearance of the BOD of embodiment 1～3 (BOD) is all more than 88%, and comparison is higher than the district.And the clearance of the contrast district total nitrogen (T-N) of embodiment 1～3 is high, and the clearance of embodiment 2 that particularly the total content of zeolite and powder activated carbon is high and the total nitrogen (T-N) of embodiment 3 is high, more than 65%.
The foregoing description and experimental example have proved when granular carrier of the present invention is used for wastewater treatment can increase substantially clearance.
Claims (9)
1. granular carrier that is used for wastewater treatment, it is characterized in that: according to listed as parts by weight, it is processed for 5～15 parts with 50～70 parts of waste polyethylenes, 10～30 parts of zeolites and powder activated carbon.
2. according to the said granular carrier that is used for wastewater treatment of claim 1, it is characterized in that: according to listed as parts by weight, it is processed for 10 parts with 60 parts of waste polyethylenes, 20 parts of zeolites and powder activated carbon.
3. according to claim 1 or the 2 said granular carriers that are used for wastewater treatment, it is characterized in that: the diameter of said granular carrier is 5～10mm.
4. like each said preparation method who is used for the granular carrier of wastewater treatment among the claim 1-3, it is characterized in that: may further comprise the steps:
(a) raw material stirring is mixed: waste polyethylene, zeolite and powder activated carbon are mixed process mixture;
(b) the mixture fusion is extruded;
(c) extrusion molding: cut into particulate state after the mixture fusion with the fusion extrusion;
(d) high speed dewatering: with the high speed dewatering device water and carrier separating;
(e) with the particulate vector metering packing of processing.
5. according to the said preparation method who is used for the granular carrier of wastewater treatment of claim 4, it is characterized in that: raw material mixed 30～60 minutes with the rotating speed of 75～80rpm in the step (a); Melt temperature when fusion extrudes in the step (b) is 200～250 ℃, and extruder pressure is 0.2～0.4kgf/cm
2Temperature in the step (c) during extrusion molding is 230～280 ℃, and pressure is 0.3～0.5kgf/cm
2Spray 10～16 ℃ water with water-jet exhauster (5) when cutting in the step (c); The rotating speed of step (d) high speed water trap is 1500～1600rpm.
6. like each said preparation facilities that is used for the granular carrier of wastewater treatment among the claim 1-3; Comprise whisking appliance (1), fusion tube machine (4), single-lead-screw extruding briquetting machine (7), carrier transfer lime (8), high speed dewatering device (9) and metering packing device (11); It is characterized in that: the discharge port of whisking appliance (1) is connected with the opening for feed of fusion tube machine (4); The discharge port of fusion tube machine (4) is corresponding with the opening for feed of single-lead-screw extruding briquetting machine (7) or be connected; The discharge port of single-lead-screw extruding briquetting machine (7) links to each other with high speed dewatering device (9) through carrier transfer lime (8), and high speed dewatering device (9) links to each other with metering packing device (11) through carrier transfer lime (8).
7. according to the said preparation facilities that is used for the granular carrier of wastewater treatment of claim 6; It is characterized in that: be provided with well heater (2) in the fusion tube machine (4) and carry dark wheel (3), be provided with well heater (2) in the single-lead-screw extruding briquetting machine (7), carry dark wheel (3) and former (6).
8. according to the said preparation facilities that is used for the granular carrier of wastewater treatment of claim 7, it is characterized in that: the top of former (6) is provided with water-jet exhauster (5).
9. according to the said preparation facilities that is used for the granular carrier of wastewater treatment of claim 6, it is characterized in that: be provided with carrier storage compartment (10) between carrier transfer lime (8) and the metering packing device (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010538792XA CN102464403A (en) | 2010-11-10 | 2010-11-10 | Granular carrier for wastewater processing, preparation method thereof and preparation device thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010538792XA CN102464403A (en) | 2010-11-10 | 2010-11-10 | Granular carrier for wastewater processing, preparation method thereof and preparation device thereof |
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| CN102464403A true CN102464403A (en) | 2012-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010538792XA Pending CN102464403A (en) | 2010-11-10 | 2010-11-10 | Granular carrier for wastewater processing, preparation method thereof and preparation device thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103818998A (en) * | 2014-03-11 | 2014-05-28 | 西南科技大学 | Method for preparing biomass microbial carrier |
| CN110709370A (en) * | 2017-02-28 | 2020-01-17 | 德莱特有限公司 | Systems, methods, and apparatus for improving the quality of wastewater effluents and biosolids |
| EP3695955A4 (en) * | 2017-11-17 | 2020-10-21 | Dalian University of Technology | Method for preparing biocarrier for fixing biomass charcoal by using thermoplastic resin |
-
2010
- 2010-11-10 CN CN201010538792XA patent/CN102464403A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103818998A (en) * | 2014-03-11 | 2014-05-28 | 西南科技大学 | Method for preparing biomass microbial carrier |
| CN110709370A (en) * | 2017-02-28 | 2020-01-17 | 德莱特有限公司 | Systems, methods, and apparatus for improving the quality of wastewater effluents and biosolids |
| US11440853B2 (en) | 2017-02-28 | 2022-09-13 | Drylet, Inc. | Systems, methods, and apparatus for increased wastewater effluent and biosolids quality |
| EP3695955A4 (en) * | 2017-11-17 | 2020-10-21 | Dalian University of Technology | Method for preparing biocarrier for fixing biomass charcoal by using thermoplastic resin |
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Application publication date: 20120523 |