CN102120651B - Filter element used for sewage purification and sewage purification device with same - Google Patents
Filter element used for sewage purification and sewage purification device with same Download PDFInfo
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- CN102120651B CN102120651B CN2011100280225A CN201110028022A CN102120651B CN 102120651 B CN102120651 B CN 102120651B CN 2011100280225 A CN2011100280225 A CN 2011100280225A CN 201110028022 A CN201110028022 A CN 201110028022A CN 102120651 B CN102120651 B CN 102120651B
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Abstract
The invention relates to a filter element used for sewage purification and a sewage purification device with same. The filter element of the invention contains a cylindrical inner core, a filtering unit which is arranged on the periphery of the inner core and used to filter sewage, and a filter element shell which is arranged on the periphery of the filtering unit, wherein the filtering unit contains a filtering membrane, filtering beads and a natural nonmetallic mineral material; the filtering membrane extends along the length direction of the inner core, is arranged along the circumference of the inner core in a switchback manner and is between the inner wall of the shell and the outer wall of the inner core; and the filtering beads and a natural nonmetallic mineral material are filled between the filtering membrane and the filter element shell and inner core. As the filtering membrane adopts the switchback manner, the filtering surface area of the filter element is greatly increased and the filtration efficiency of the filter element is increased; and the filtering beads and natural nonmetallic mineral material are used to support and shape the filtering membrane and ensure that the water filtered by the filter element has better water quality. By adopting the sewage purification device containing the filter element of the invention, the purification efficiency of sewage can be increased, the equipment can be simplified and the space and cost can be saved.
Description
Technical field
The present invention relates to a kind of effluent treatment plant that is used for the filter core of sewage purification and contains this filter core
Background technology
Along with industrial progress and social development, water pollutes and also is on the rise
, and a No.1 environmental improvement difficult problem becomes international.Water pollutes and mainly to comprise three types of industrial pollution, agricultural pollution and domestic pollutions, and industrial pollution is the primary pollution source that water pollutes.At present the device efficiency handled of trade effluent is low, and floor space is big, and complex structure uses back apparatus maintenance and cleaning trouble for a long time, and manufacturing and maintenance cost are also high, thereby the scope of penetration and promotion is restricted
Summary of the invention
The present invention is intended to overcome the deficiency of prior art, and a kind of improved filter core that is used for sewage purification is provided, and its filter membrane surface is long-pending big, and filter efficiency is high;
the present invention also provide a kind of effluent treatment plant that contains this filter core, and its wastewater purification efficiency is high, and simple and compact for structure, and floor space is little.
For solving above technical problem, the technical scheme that the present invention takes is:
a kind of filter core that is used for sewage purification; Comprise at least one end opening the tubular inner core, be around in the filter case that the inner core periphery is used for the filter element that sewage is filtered and is around in the filter element periphery; Filter element comprise along the length direction of inner core extend and between the outer wall of the inwall of shell and inner core along turn back the back and forth filter membrane of setting of the circumferencial direction of inner core; The inwall of this filter membrane and shell surrounds along equally distributed a plurality of first filter chambers of the circumferencial direction of shell; And the outer wall of this filter membrane and inner core surrounds along equally distributed a plurality of second filter chambers of the circumferencial direction of inner core, and said filter element also comprises filter pearl that is filled in a plurality of first filter chambers and the natural nonmetallic mineral material that is filled in a plurality of second filter chambers.
preferably; Filter membrane is spliced along the circumferencial direction of the inner core membrane module that is provided with of turning back back and forth between the outer wall of the inwall of shell and inner core by polylith; Said filter element also comprises a plurality of jockeys that extend and be used for the adjacent membranes assembly is stitched together along the length direction of inner core; This jockey comprises the outer bar of the clamping with the draw-in groove that runs through self length direction, can be clamped on bar in the clamping in the draw-in groove, and the edge part of extending along the length of inner core direction of adjacent two membrane modules can be wound on and snap in the splicing that realizes in the draw-in groove between the membrane module in the clamping on the bar and through bar in the clamping.
preferably be lining in the sorbing material that leans on second filter chamber, one side of filter membrane in filter element also comprises, and this sorbing material are nonwoven or polyglutamic acid adsorbed film.
preferably, filter membrane can for the aperture at polyvinylidene fluoride film between 0.03～0.45 micron or the aperture poly tetrafluoroethylene between 0.4～2.0 micron.
preferably, the filter pearl be the plastic pellet of particle diameter between 2～4 millimeters.
preferably, natural nonmetallic mineral material is one or more the mixture in active carbon, active zeolite, attapulgite, the fetters stone.
a kind of effluent treatment plant that contains above-mentioned filter core; Comprise sump, water purification efferent duct; Filter core is arranged on the inside of sump, and the inner core of filter core is inner to form the water purification passage that supplies water and pass through, and the water purification passage is connected with the water purification efferent duct.
preferably; Filter core is horizontally set in the sump along self direction of axis line rotationally; One end of filter core has totally-enclosed fluid-tight first end face; The other end has the middle part and offers second end face of pure water inlet according to water purification passage correspondence, and the water purification efferent duct can be connected with second end face at the pure water inlet place with relatively rotating; This effluent treatment plant also comprise be fixedly connected with first end face and along self direction of axis line be horizontally set on turning cylinder on the sump rotationally, drive motor that turning cylinder rotates, clean water tank and be connected with the water purification efferent duct and be used for water purification rear pump with the water suction clean water tank in the water purification passage.
preferably; This effluent treatment plant comprises also that an end is connected with clean water tank, the other end is connected with the water purification passage and is used for the backwashing pump that suspension that a part of water in the clean water tank is drawn back in the water purification passage and can be held back filter element or large particulate matter wash, and the backwash control device that an end links to each other with backwashing pump, the other end links to each other with water purification rear pump or water purification efferent duct; This backwash control device can or cut out according to the unlatching of the flow FEEDBACK CONTROL backwashing pump of the pressure feedback of water purification rear pump or water purification efferent duct.
preferably; The sump bottom has sludge outlet; Said effluent treatment plant also comprises the sludge pump that is used for the mud of sump bottom deposit is extracted out of being connected with sludge outlet, being connected with sludge pump is used for the filter press that the mud to the sludge pump extraction carries out press filtration; This filter press has two outlets; One of them is connected with the mud bucket that receives sludge residue, and another is connected with sewage pump so that the water of press filtration gained can be drawn back to sump again purifies.
Through the enforcement of above technical scheme, the effluent treatment plant that makes filter core of the present invention and contain this filter core compared with prior art has plurality of advantages:
the present invention is used for the filter core of sewage purification; Because its filter element comprises along between the outer wall of the inwall of shell and inner core, turn back the back and forth filter membrane of setting of the circumferencial direction of inner core; Make the surface area of the common filter element filtering film of surface area ratio of filter membrane greatly increase, improved the filter efficiency of filter core; And be filled in the shell of filter membrane and filter core and filter pearl between the inner core and natural nonmetallic mineral material; Can not only play the supporting and shaping effect to filter membrane; Sewage is filtered through multiple tracks, and suspension in the elimination sewage and harmful substance make the water quality of filtering gained water better; The present invention contains the effluent treatment plant of above-mentioned filter core when improving wastewater purification efficiency, also can the simplified apparatus structure.
Description of drawings
Below in conjunction with accompanying drawing and concrete embodiment the present invention is done further detailed explanation:
Fig. 1 looks sketch map for the master of filter core of the present invention;
Fig. 2 is the A-A sectional structure sketch map of Fig. 1;
Fig. 3 is the enlarged drawing at C position among Fig. 2;
Fig. 4 is the jockey structural representation;
Fig. 5 is the structural representation of effluent treatment plant of the present invention;
wherein: 1, inner core; 10, water purification passage; 2, shell; 3, filter membrane; 30, membrane module; 4, filter pearl; 5, natural nonmetallic mineral material; 6, sorbing material; 7, jockey; 70, the outer bar of clamping; 71, bar in the clamping; 8, first end face; 9, second end face; 11, sump; 12, turning cylinder; 13, motor; 14, water purification efferent duct; 15, clean water tank; 16, water purification rear pump; 17, backwashing pump; 18, backwash control device; 19, sludge pump; 20, filter press; 21, mud bucket; 22, sewage pump.
The specific embodiment
are done further detailed explanation below in conjunction with concrete embodiment to the present invention, but are not limited to these embodiment.
are like Fig. 1,2, shown in 3 and 4; According to the filter core that is used for sewage purification of present embodiment comprise an end opening tubular inner core 1, be around in the filter case 2 that inner core 1 periphery is used for the filter element that sewage is filtered and is around in the filter element periphery; This filter element comprise along the length direction of inner core 1 extend and between the outer wall of the inwall of shell 2 and inner core 1 along turn back the back and forth filter membrane 3 of setting of the circumferencial direction of inner core 1; Filter membrane 3 surrounds along equally distributed a plurality of first filter chambers of the circumferencial direction of shell 2 with the inwall of shell 2; Filter membrane 3 surrounds along equally distributed a plurality of second filter chambers of the circumferencial direction of inner core 1 with the outer wall of inner core 1; Fill up in these a plurality of first filter chambers in filter pearl 4, the second filter chambers and fill up natural nonmetallic mineral material 5.
are according to present embodiment; Filter membrane 3 is spliced along the circumferencial direction of inner core 1 membrane module 30 that is provided with of turning back back and forth between the outer wall of the inwall of shell 2 and inner core 1 by polylith; This filter element also comprises a plurality of jockeys 7 that extend and be used for adjacent membranes assembly 30 is stitched together along the length direction of inner core 1; Jockey 7 comprises the outer bar 70 of the clamping with the draw-in groove that runs through self length direction, can be clamped on bar 71 in the clamping in the draw-in groove, and the edge part of extending along inner core 1 length direction of adjacent two membrane modules 30 can be wound on and snap in the splicing that realizes in the draw-in groove between the membrane module 30 in the clamping on the bar 71 and through bar in the clamping 71.Adopt this weldless channel bar interface arrangment, compare, can make the utilization rate of membrane material improve 1.3～1.5 times with traditional welding symphysis connection technology.
are lining in the sorbing material 6 near second filter chamber, one side of filter membrane 3 according to present embodiment in filter element also comprises, and according to the demands of different to sewage purification, sorbing material 6 also can be different.For example, sorbing material 6 can be a nonwoven, and it mainly is to use as the inner protective layer of filter membrane 3; When containing more heavy metal ion in the sewage, sorbing material 6 can change the polyglutamic acid adsorbed film into, and it has extremely strong complexing power to heavy metal ion in the sewage and radioactive element, can be well with they filterings.
In
present embodiment, filter membrane 3 can for the aperture in polyvinylidene fluoride (PVDF) ultrafiltration membrane between 0.03～0.45 micron or the aperture polytetrafluoroethylene (PTFE) micro-filtration membrane between 0.4～2.0 micron.Filter membrane 3 itself should have certain intensity and toughness, can be converted into required form.
natural nonmetallic mineral material 5 is one or more the mixture in active carbon, active zeolite, attapulgite, the fetters stone; Can go into second filter chamber with natural nonmetallic mineral material 5 is canned, also can sinter natural nonmetallic mineral material 5 into piece earlier and insert second filter chamber again.Natural nonmetallic mineral material 5 has the structure of similar molecular sieve; Heterochromatic smell substance and part heavy metal ion in can adsorption filtration sewage; When adopting present embodiment filter element filtering sewage simultaneously; Under certain pressure, 5 pairs of filter membranes 3 of natural nonmetallic mineral material also can play the effect of supporting and finalizing the design.
are as shown in Figure 5; Effluent treatment plant according to present embodiment contains the filter core among the embodiment 1; The effluent treatment plant of present embodiment comprises sump 11, water purification efferent duct 14; Filter core is arranged on the inside of sump 11, the water purification path 10 (shown in Figure 2) that the inner core 1 inner formation of filter core is supplied water and passed through, and the water purification path 10 is connected with water purification efferent duct 14.
In
present embodiment; Filter core is horizontally set in the sump 11 along self direction of axis line rotationally; One end of filter core has totally-enclosed fluid-tight first end face 8; The other end has the middle part and offers second end face 9 of pure water inlet according to water purification path 10 correspondence, and water purification efferent duct 14 can be connected with second end face 9 at the pure water inlet place with relatively rotating; The effluent treatment plant of present embodiment also comprise be fixedly connected with first end face 8 and along self direction of axis line be horizontally set on turning cylinder 12 on the sump 11 rotationally, drive motor 13 that turning cylinder 12 rotates, clean water tank 15 and be connected with water purification efferent duct 14 and be used for water purification rear pump 16 with the water suction clean water tank 15 in the water purification path 10.
In
present embodiment; Effluent treatment plant also comprises backwashing pump 17; Backwashing pump 17 1 ends are connected with clean water tank 15, the other end is connected with the water purification path 10; It can be drawn back a part of water in the clean water tank 15 in the water purification path 10 and with it and be depressed into outside the filter core from the water purification path 10, and then suspension or the large particulate matter that filter element is held back carried out backwash, in case filter core uses for a long time and stops up; In addition; Between backwashing pump 17 and water purification rear pump 16 or water purification efferent duct 14, also be provided with backwash control device 18, backwash control device 18 can or cut out according to the unlatching of the flow FEEDBACK CONTROL backwashing pump 17 of the pressure feedback of water purification rear pump 16 or water purification efferent duct 14.If the signal feedback of backwash control device 18 is a pressure feedback, then when the pressure of water purification rear pump 16 during greater than certain value, startup backwashing pump 17 is closed water purification rear pump 16 simultaneously, and filter core is carried out backwash; If the signal feedback of backwash control device 18 is the flow feedback, then when the flow of water purification efferent duct 14 during less than certain value, startup backwashing pump 17 is closed water purification rear pump 16 simultaneously, and filter core is carried out backwash.
are according to present embodiment; Sump 11 bottoms have sludge outlet; This effluent treatment plant also comprises the sludge pump 19 that is used for the mud of sump 11 bottom deposits is extracted out of being connected with sludge outlet, being connected with sludge pump 19 is used for the filter press 20 that the mud to sludge pump 19 extractions carries out press filtration; Filter press 20 has two outlets; One of them is connected with the mud bucket 21 that receives sludge residue, and another is connected with sewage pump 22 so that the water of press filtration gained can be drawn back to sump 11 again purifies.
Operation principle according to the effluent treatment plant of present embodiment is following:
at first add sewage in sump 11, make the liquid level of sewage be higher than filter core; Start motor 13 and water purification rear pump 16; Motor 13 drives turning cylinder 12 and rotates; Turning cylinder 12 drives filter cores and rotates along self direction of axis line, and 16 of water purification rear pumps make sewage via filter case 2, filter pearl 4, filter membrane 3, sorbing material 6, natural nonmetallic mineral material 5 and inner core 1 arrival water purification path 10 for filter core provides a malleation; Accomplish filter process, filter gained water further by water purification rear pump 16 through water purification efferent duct 14 suction clean water tanks 15.
After a period of time is filtered in
; Filter core has been held back dirts such as a large amount of suspensions and large particulate matter outward, and these dirts are through aggegation, and major part can be deposited on the bottom of sump 11; When mud in sump 11 bottom deposits to a certain amount of the time; Can open the sludge outlet of sump 11 bottoms, start sludge pump 19 and extract and send into mud out filter press 20, be admitted to 21 outward transports of mud bucket through filter press 20 press filtration gained sludge residues and handle; And press filtration gained water is drawn back to sump 11 by sewage pump 22 again, refilters.
when the dirt of being held back outside the filter core when filter case 2 surperficial aggegations are too much, can have a strong impact on the filter efficiency of filter core, thereby need to clear up these dirts.The backwashing pump 17 and the backwash control device 18 that are provided with in the present embodiment effluent treatment plant can effectively address this problem.Backwash control device 18 is according to the flow feedback of pressure feedback of coming self-purification rear pump 16 or water purification efferent duct 14; Can in time start backwashing pump 17; And, a part of water in the clean water tank 15 is got back in the sump 11 via inner core 1, filter element and shell 2 for filter core provides a negative pressure, simultaneously filter element and the shell 2 surperficial dirts of being held back are washed; So that filter core does not stop up, guarantee the filter efficiency of filter core.
The purification efficiency of
present embodiment effluent treatment plant is high, and the water quality that purifies gained water is good; Filter core adopts the rotary type design, helps the sludgd deposition and the efficient that improves backwash of cartridge surface; And the compact conformation of this device, floor space is little, and is simple to operate, and operating cost and energy consumption are all very low, have greatly application value.
More than the present invention has been done detailed description; Its purpose is to let the personage that is familiar with this art can understand content of the present invention and implements; Can not limit protection scope of the present invention with this; All equivalences of doing according to spirit of the present invention change or modify, and all should be encompassed in protection scope of the present invention
Claims (10)
1. filter core that is used for sewage purification; Comprise at least one end opening tubular inner core (1), be around in the filter case (2) that said inner core (1) periphery is used for the filter element that sewage is filtered and is around in said filter element periphery; It is characterized in that: said filter element comprise along the length direction of said inner core (1) extend and between the outer wall of the inwall of said shell (2) and said inner core (1) along turn back the back and forth filter membrane (3) of setting of the circumferencial direction of said inner core (1); Said filter membrane (3) surrounds along equally distributed a plurality of first filter chambers of circumferencial direction of said shell (2) with the inwall of said shell (2); Said filter membrane (3) surrounds along equally distributed a plurality of second filter chambers of circumferencial direction of said inner core (1) with the outer wall of said inner core (1), and said filter element also comprises filter pearl (4) that is filled in a plurality of said first filter chambers and the natural nonmetallic mineral material (5) that is filled in a plurality of said second filter chambers.
2. filter core according to claim 1; It is characterized in that: said filter membrane (3) is spliced along the circumferencial direction of said inner core (1) membrane module (30) that is provided with of turning back back and forth between the outer wall of the inwall of said shell (2) and said inner core (1) by polylith; Said filter element also comprises the jockey (7) that the length direction of the said inner cores in a plurality of edges (1) extends and is used for adjacent said membrane module (30) is stitched together; Said jockey (7) comprises the outer bar (70) of the clamping with the draw-in groove that runs through self length direction, can be clamped on bar (71) in the clamping in the said draw-in groove, and the edge part that the said inner core in edge (1) length direction of adjacent two said membrane modules (30) extends can be wound in the said clamping that bar (71) is gone up and snap in through bar (71) in the said clamping that said draw-in groove is interior realizes the splicing between the said membrane module (30).
3. filter core according to claim 1 and 2; It is characterized in that: be lining in the sorbing material (6) that leans on said second filter chamber, one side of said filter membrane (3) in said filter element also comprises, and said sorbing material (6) is nonwoven or polyglutamic acid adsorbed film.
4. filter core according to claim 1 and 2 is characterized in that: said filter membrane (3) is that the aperture is at polyvinylidene fluoride film between 0.03～0.45 micron or the aperture poly tetrafluoroethylene between 0.4～2.0 micron.
5. filter core according to claim 1 and 2 is characterized in that: said filter pearl (4) is the plastic pellet of particle diameter between 2～4 millimeters.
6. filter core according to claim 1 and 2 is characterized in that: said natural nonmetallic mineral material (5) is one or more the mixture in active carbon, active zeolite, attapulgite, the fetters stone.
7. one kind contains the effluent treatment plant of filter core according to claim 1; Comprise sump (11), water purification efferent duct (14); Said filter core is arranged on the inside of said sump (11); The inner core of said filter core (1) is inner to form the water purification passage (10) that supplies water and pass through, and said water purification passage (10) is connected with said water purification efferent duct (14).
8. effluent treatment plant according to claim 7; It is characterized in that: said filter core is horizontally set in the said sump (11) along self direction of axis line rotationally; One end of said filter core has totally-enclosed fluid-tight first end face (8); The other end has the middle part and offers second end face (9) of pure water inlet according to said water purification passage (10) correspondence, and said water purification efferent duct (14) can be connected with said second end face (9) at said pure water inlet place with relatively rotating; Said effluent treatment plant also comprise be fixedly connected with said first end face (8) and along self direction of axis line be horizontally set on turning cylinder (12) on the said sump (11) rotationally, drive motor (13) that said turning cylinder (12) rotates, clean water tank (15) and be connected with said water purification efferent duct (14) and be used for water purification rear pump (16) with the said clean water tank of water suction (15) in the said water purification passage (10).
9. effluent treatment plant according to claim 8; It is characterized in that: said effluent treatment plant comprises also that an end is connected with said clean water tank (15), the other end is connected with said water purification passage (10) and is used for the backwashing pump (17) that suspension that a part of water in the said clean water tank (15) is drawn back in the said water purification passage (10) and can be held back said filter element or large particulate matter wash, and the backwash control device (18) that an end links to each other with said backwashing pump (17), the other end links to each other with said water purification rear pump (16) or said water purification efferent duct (14); Said backwash control device (18) can or cut out according to the unlatching of the said backwashing pump of flow FEEDBACK CONTROL (17) of the pressure feedback of said water purification rear pump (16) or said water purification efferent duct (14).
10. effluent treatment plant according to claim 9; It is characterized in that: said sump (11) bottom has sludge outlet; Said effluent treatment plant also comprises the sludge pump (19) that is used for the mud of said sump (11) bottom deposit is extracted out of being connected with said sludge outlet, being connected with said sludge pump (19) is used for the filter press (20) that the mud to said sludge pump (19) extraction carries out press filtration; Said filter press (20) has two outlets; One of them is connected with the mud bucket (21) that receives sludge residue, and another is connected with sewage pump (22) so that the water of press filtration gained can be drawn back to said sump (11) again purifies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100280225A CN102120651B (en) | 2011-01-26 | 2011-01-26 | Filter element used for sewage purification and sewage purification device with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100280225A CN102120651B (en) | 2011-01-26 | 2011-01-26 | Filter element used for sewage purification and sewage purification device with same |
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| CN102120651A CN102120651A (en) | 2011-07-13 |
| CN102120651B true CN102120651B (en) | 2012-04-25 |
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| CN2011100280225A Active CN102120651B (en) | 2011-01-26 | 2011-01-26 | Filter element used for sewage purification and sewage purification device with same |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102527154A (en) * | 2011-10-20 | 2012-07-04 | 常州亚环环保科技有限公司 | Structural filter element used for removing silver in drinking water and preparation method thereof |
| CN102826624A (en) * | 2012-08-13 | 2012-12-19 | 吴江市聚力机械有限公司 | Adsorption rod for waste water treatment |
| CN103043836A (en) * | 2012-12-03 | 2013-04-17 | 姜英杰 | Energy-saving and water-saving type water purifier |
| CN103910392A (en) * | 2014-04-11 | 2014-07-09 | 上海亚弘过滤器材有限公司 | Filter element of household, commercial and industrial water purifier |
| CN106517374A (en) * | 2016-11-21 | 2017-03-22 | 苏州爱利过滤技术有限公司 | Novel high-efficiency filter core |
| CN106396198A (en) * | 2016-12-06 | 2017-02-15 | 福建海西滤水龙头研究中心有限公司 | Direct drinking filtering composite filter element and water filtering faucet |
| CN108079626A (en) * | 2017-12-22 | 2018-05-29 | 苏州艾捷尔斯生物科技有限公司 | A kind of environment-friendly sewage filter device |
| CN108634556B (en) * | 2018-03-28 | 2020-06-30 | 广西艾尚嘉家居有限公司 | Table with formaldehyde adsorption function |
| CN111170515A (en) * | 2020-03-10 | 2020-05-19 | 杭州鹏程混凝土有限公司 | Concrete-manufacturing-based wastewater treatment system and operation method thereof |
| CN111906635B (en) * | 2020-07-28 | 2021-11-16 | 鲍玲芳 | Automatic grinding device for water pump pliers |
| CN112933707A (en) * | 2021-01-28 | 2021-06-11 | 张振亚 | Prevent blockking up river course mud solid-liquid separation processing apparatus |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MY136329A (en) * | 2002-11-01 | 2008-09-30 | Nep Holdings Malaysia Bhd | Improvement in the mechanism of water treatment system |
| DE102004001717A1 (en) * | 2004-01-13 | 2005-08-04 | Robert Bosch Gmbh | Filter device, in particular for an exhaust system of an internal combustion engine |
| CN101219299B (en) * | 2007-09-12 | 2010-08-18 | 昆山工研院华科生物高分子材料研究所有限公司 | Filter element |
| CN202016906U (en) * | 2011-01-26 | 2011-10-26 | 昆山工研院华科生物高分子材料研究所有限公司 | Filter element for purifying sewage and sewage purifying device comprising filter element |
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