CN103539255B - Suspension haydite-active carbon double layer filter and apply it and process the method for former water - Google Patents
Suspension haydite-active carbon double layer filter and apply it and process the method for former water Download PDFInfo
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
Openly suspend haydite-active carbon double layer filter and apply it and process the method for former water of the present invention. The intake chamber of suspension haydite-active carbon double layer filter and distribution channel lay respectively at the upper and lower of the same side of up-flow suspension haydite-active carbon double layer filter body, and effluent trough is positioned at the top of distribution channel opposite one side; Distribution channel is also communicated with up-flow suspension haydite-active carbon double layer filter body lower end by distributing hole; In the body of filter tank, be followed successively by from top to bottom water distributing area, gas flushing gas distribution pipe, fenestra aeration tube, lower filter screen, suspension haydite bed, filter plate, active-carbon bed and exhalant region. On filtrate of the present invention, biomembrane utilizes oxygen in water biochemical degradation ammonia nitrogen, organic matter and smells taste material; Filter plate low suspension haydite can be held back most of turbidity under microdilatancy state, and removes the heavy metals such as iron, manganese, thallium by haydite surface catalyzed oxidation; On filter plate, active carbon adsorbs under low turbid condition, is conducive to maintain adsorption capacity, and performance emergencing action, realizes the deep purifying for the treatment of drainage.
Description
Technical field
The present invention relates to micro-polluted water processing, particularly relate to a kind of suspension haydite-active carbon double layer filter and apply its processing formerThe method of water.
Background technology
For suffering ammonia nitrogen and organic matter micro polluted source, often adopt at present ozone-biological active carbon feedwater depth both at home and abroadReason technology, is after the sand filtration unit of " coagulation-precipitation-sand filtration-sterilization " conventional water-purifying process, increases charcoal absorptionPond, forms " coagulation-precipitation-sand filtration-charcoal absorption-sterilization " advanced treatment process, and further Adsorption organic matter is micro-Pollutant. In the time that water temperature exceedes 5 DEG C, on active carbon, biomembrane can degradation of organic substances and nitrated ammonia nitrogen, therefore charcoal absorptionPond is called again biological activated carbon pond. Because this biological activated carbon pond is positioned at the end of water-purifying process unit, claim again rearmounted biological livingProperty charcoal pond. This technique is at home since large-scale application, to smelling taste material, organic pollution oxidation removal ability is stronger, and shouldMore outstanding to water source burst pollution ability, aspect water correction, obtain extensive approval. The work in rearmounted biological activated carbon pondProperty charcoal absorption with biochemical directly for the residual micro polluting substance of common process water outlet, purification efficiency is high, influent turbidity lower than1NTU, thus flushing cycle seldom greatly extended through the turbidity of biological activated carbon pond cut-off filter, therefore operating cost reduces. ButBe biological activated carbon pond for miniature aquatic animal provides suitable growth conditions, formed microorganism → protozoan → large-scaleInvertebrate biological chain, there is miniature organism penetration phenomenon in the water outlet of biological activated carbon pond, and in south China subtropical zoneEspecially outstanding, water quality has been formed to potential safety hazard. If biological activated carbon pond is arranged in to " coagulation-precipitation-sand filtration " techniqueCoagulating sedimentation and sand filtration unit between, and sterilize before sand filtration, form " coagulation-precipitation-biological activated carbon-sterilization-sandFilter " advanced treatment process, utilize sterilization-sand filtration unit to check on, can effectively solve biological activated carbon pond and reveal microorganism pairThe water quality safety risk that output water brings. Because this biological activated carbon pond is between coagulating sedimentation and sand filtration unit, in claiming againPut biological activated carbon pond. What rearmounted biological activated carbon pond generally adopted falls streaming pond type and is not suitable for mid-biological activated carbon pond,Its reason is that mid-biological activated carbon pond needn't control delivery turbidity, uses up-flow instead and can make outlet canal and the follow-up streaming of fallingSand filter inlet channel reasonable link, significantly reduces the loss of flood peak. But drainage that mid-biological activated carbon pond is entered to treat is more raw than rearmountedAfter the sand filtration that pond is entered of thing active carbon, the turbidity of water obviously increases, and not only the absorption of active carbon is caused to adverse effect, due to up-flowThe turbidity material of formula active carbon pond institute cut-off filter is in bottom, active carbon pond, and water purification ature of coal granular activated carbon water infiltration grain density reachesTo 1.4～1.6g/cm3, the flushing difficulty that evenly expands is larger, likely causes filtrate to harden, and affects biological activated carbon pond normalOperation.
Summary of the invention
The present invention is intended to overcome the problem that prior art exists, and a kind of the outstanding of mid-active carbon pond filter clogging problem of avoiding is providedFloating haydite-active carbon double layer filter.
Another object of the present invention is to provide the above-mentioned suspension haydite-active carbon double layer filter of application to process the method for former water.
The present invention is in conjunction with the process characteristic in suspension haydite BAF and aerated biological activated carbon filter tank, by suspension hayditeBe placed under filter plate, first contact with treating drainage, due to suspension haydite bed in the time that aeration intensity is little in microdilatancy state,Water environment capacity is strong, and water head loss by filtration increases slowly, and flushing cycle is long, and is easy to rinse fluidisation, and antifriction intensity is high, suitableClose and treat drainage and carry out initial filter, remove most of turbidity material. In addition, suspension haydite specific area is large, rough surface parentWater easy to be filmed can be brought into play its biochemical action simultaneously; Active carbon is placed on filter plate, accepts low turbidity water, give full play toThe function of micropollutants in water is removed in charcoal absorption, biodegradation. To being no more than the thick ￠ 1.5～3mm of 2m particle charcoal bedCan adopt air water to combine and rinse unlikely race charcoal, realize charcoal bed and effectively expand, thereby ensure active-carbon bed flushing effectReally. Therefore, the present invention is by the overcurrent mode of up-flow, can pass through entering to treat that drainage turbidity is no more than under 3NTU conditionThe initial filter of filter plate low suspension haydite bed, keeps active-carbon bed stable operation under the low turbid environment of < 1NTU for a long time. When flushing itsFilter plate low suspension haydite, can be effectively swollen and be no more than the thick ￠ 1.5～3mm of 2m particle charcoal bed on filter plate in fluidized stateSwollen, thus mid-active carbon pond filter clogging problem solved.
Object of the present invention is achieved through the following technical solutions:
Suspension haydite-active carbon double layer filter: comprise intake chamber, distribution channel, the double-deck filter of up-flow suspension haydite-active carbonPond body and effluent trough; Intake chamber and distribution channel lay respectively at the same side of up-flow suspension haydite-active carbon double layer filter bodyUpper and lower, effluent trough is positioned at the top of distribution channel opposite one side; Intake chamber is communicated with distribution channel by water inlet pipe, distribution channelBe communicated with water cleaning hose and drainpipe respectively; Distribution channel is also by distributing hole and up-flow suspension haydite-active carbon double layer filterBody lower end is communicated with; In the body of filter tank, be followed successively by from top to bottom water distributing area, gas flushing gas distribution pipe, fenestra aeration tube, lower filter screen, outstandingFloating haydite bed, filter plate, active-carbon bed and exhalant region; Exhalant region is connected with outlet canal by effluent weir; Gas flushing gas distribution pipe is logicalCrossing gas flushing pipe is connected with gas flushing air blast; Fenestra aeration tube is connected with gas flushing air blast by aeration tube; Run through filter plateBe evenly arranged multiple stockless filters; The thickness of described suspension haydite bed is 1～2m, the suspension haydite that is 8～12mm by particle diameterPile up composition, the water infiltration grain density 0.9～1.1g/cm of suspension haydite3; Described active-carbon bed thickness is 1.5～2m,The active carbon that is 1.5～3mm by particle diameter is piled up and is formed, the water infiltration grain density 1.4～1.6g/cm of active carbon3。
Preferably, described lower filter screen is aperture 4～5mm stainless (steel) wire. Described filter plate adopts armored concrete filter plate. Described enterWater pipe is provided with water intaking valve; Gas flushing gas distribution pipe is positioned at fenestra aeration tube below. Described water wash tub pipe connects water and rinses main,Rinse main by water and be connected with flush water pump, the pipeline that water wash tub pipe is connected with distribution channel is provided with water and rushes valve. Described enterWater pipe is provided with water intaking valve; Drainpipe is provided with draining valve. Described distributing hole is multiple, and multiple distributing holes are distributed on distribution channelThe pool wall being connected with pond body.
The described suspension haydite-active carbon double layer filter of application is processed the method for former water: that allocates intake chamber into treats that drainage is by intakingPipe imports distribution channel, enters water distributing area, bottom, filter tank by distributing hole, carries out slight drag join by lower filter screen and filter plate and filterWater, will treat that drainage is uniform to filtering surface below lower filter screen; The fenestra aeration tube that is positioned at lower filter screen below will be from aeration blowerCompressed air uniform to filtering surface below lower filter screen, and treat that drainage is upper in the same way and flow and mix, then pass lower filter screen and filterActive-carbon bed on suspension haydite bed between plate and filter plate, contact with the biomembrane of filter material surface growth, by mass transfer and oxygen supply,Remove ammonia nitrogen, organic matter in water, smell taste material; Filter plate low suspension haydite is held back most of turbidity under microdilatancy state,And by haydite surface catalyzed oxidation removal heavy metal; On filter plate, active carbon adsorbs under low turbid condition, realizes and treats drainageDeep purifying; Water after treatment falls into outlet canal from exhalant region through effluent weir.
Suspend haydite system of the present invention adopts shale raw material, after fragmentation, oven dry, abrasive dust, granulation, in rotary kiln, fires,The haydite of coming out of the stove screening 8～12mm particle diameter, then water flotation gained floating haydite, its voidage >=35%, specific area >=3×104m2/m3(pressing stacking volume calculates), water infiltration grain density 0.9～1.1g/cm3; Filter plate adopts armored concrete filterPlate, runs through filter plate and is evenly arranged multiple stockless filters; Active-carbon bed thickness 1.5～2m, is positioned at filter plate top. Activity usedCharcoal is water purification ature of coal granular activated carbon, particle diameter 1.5～3mm, water infiltration grain density 1.4～1.6g/cm3, iodine sorption value >=800mg/g, methylenum careuleum adsorptive value >=120mg/g, intensity >=85%.
Filter plate low suspension haydite water infiltration grain density of the present invention 0.9～1.1g/cm3, very approaching with the density of water, in filterUnder the normal operation of pond, suspension haydite is looked aeration intensity size in microdilatancy and even partial suspended fluidized state, can cutStay most of turbidity, and water head loss by filtration is little and increases slowly, has extended the flushing cycle in filter tank; Suspension haydite surface is thickRough porous, biomembrane adhesion-tight, mass transfer condition is good, and biologically active is strong, biological cleaning effect stability, suspension haydite surfaceThe Fe-Mn oxidation film adhering to has significant catalytic action to heavy metals such as oxidation removal iron, manganese, thalliums.
On filter plate of the present invention, active carbon adsorbs under low turbid condition, is conducive to maintain adsorption capacity, and performance emergencing action, realizesTreat the deep purifying of drainage.
Compared with prior art, tool has the following advantages and beneficial effect in the present invention:
1, application suspension haydite-active carbon double layer filter purifies micro-polluted raw, is applicable to adopting " coagulation-precipitation-suspension potteryDouble layer filter-sand filtration-the sterilization of grain-active carbon " advanced water treatment processing technological flow, can effectively prevent that biology from letting outLeak.
2, at the thick suspension haydite of filter plate arranged beneath 1～2m bed, first contact with treating drainage, treat drainage and carry out initial filter,Treat that in order to minimizing drainage turbidity enters active-carbon bed. Suspension haydite system adopts shale to fire and forms, and antifriction intensity is high, water infiltrationGrain density 0.9～1.1g/cm3, in the time that aeration intensity is little in microdilatancy state, voidage >=35%, water environment capacity is strong,Water head loss by filtration increases slowly, and flushing cycle is long, is easy to fluidisation when gas flushing, is suitable for initial filter. In addition, suspend and make potteryGrain epidermis is coarse hydrophilic, specific area >=3 × 104m2/m3(pressing stacking volume calculates) can bring into play its biochemical action simultaneously,High to micro-polluted raw ammonia nitrogen and organic matter purification efficiency, the Fe-Mn oxidation film of haydite surface attachment to oxidation removal iron, manganese,The heavy metals such as thallium have significant catalytic action.
3, at suspension haydite arranged beneath lower filter screen, can maintain water distributing area requisite space, ensure to treat that drainage is equal in water distributing areaEven water distribution. Due to only 0.4～0.6g/cm of suspension haydite bulk density3, the thick suspension haydite of lower filter screen support 1～2m bed is requiredIntensity little, stainless (steel) wire is selected aperture ￠ 4～5mm and string diameter ￠ 0.6～1mm. Lower filter screen utilizes gas flushing gas distributionPipe and fenestra aeration tube support, and construct simpler.
4, on filter plate, arrange that 1.5～2m is thick active-carbon bed, mainly bring into play its adsorption cleaning effect, active carbon used is cleanWater ature of coal granular activated carbon, particle diameter 1.5～3mm, iodine sorption value >=800mg/g, methylenum careuleum adsorptive value >=120mg/g, intensity>=85%. Due to the water infiltration grain density 1.4～1.6g/cm of ature of coal granular activated carbon3Therefore active-carbon bed thickness should not surpassCross 2m, otherwise be difficult to expand, may cause filtrate to harden. Be isolated into bilayer with suspension haydite bed by filter plate due to active-carbon bed,On the not impact of receptor 1 activity charcoal bed of the flushing of suspension haydite bed, therefore can rinse fluidisation, both can not mix layer yet.
5, suspension haydite preliminary filter and activated carbon adsorption tank are superimposed as one by suspension haydite-active carbon double layer filter, shares and joinWater system, air-water flushing system and aerating system. Whole filter tank structure is simple, arranges and saves space.
Brief description of the drawings
Fig. 1 is suspension haydite-active carbon double-layer filter material aerating biological filter structural representation.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described, but the scope of protection of present invention is not limited to, this is concreteThe scope of embodiment statement.
As shown in Figure 1, suspension haydite-active carbon double layer filter, comprises intake chamber 1, distribution channel 4, up-flow suspension haydite-active carbon double layer filter body and effluent trough 13, the pond body of described double layer filter is rectangle, intake chamber 1 and distribution channel 4 differenceBe positioned at the upper and lower of the same side of pond body, effluent trough 13 is positioned at the top of distribution channel 4 opposite one sides. Intake chamber 1 and water distributionBetween groove 4, be provided with water inlet pipe 2, water inlet pipe 2 is provided with water intaking valve 3. One end of water wash tub pipe 14 is connected with distribution channel 4,Other end access water rinses main, is connected with flush water pump 16, and water wash tub pipe 14 is provided with water and rushes valve 15. Drainpipe 23One end be connected with distribution channel 4, other end access arterial drainage (discharging outside pond), drainpipe 23 is provided with draining valve 24.Distribution channel 4 is communicated with up-flow suspension haydite-active carbon double layer filter body lower end by distributing hole 5. Preferably distributing hole isMultiple, multiple distributing holes are distributed on the pool wall that distribution channel is connected with pond body. In the body of pond, be followed successively by from top to bottom water distributing area 6, gasRinse gas distribution pipe 17, fenestra aeration tube 20, lower filter screen 7, suspension haydite bed 8, filter plate 9, active-carbon bed 10 and exhalant region11, exhalant region 11 is communicated with outlet canal 13 by effluent weir 12. Gas flushing gas distribution pipe 17 is by gas flushing pipe 18 and gasRinsing air blast 19 connects. Fenestra aeration tube 20 is connected with aeration blower 22 by aeration tube 21. Run through filter plate 9Be evenly arranged multiple stockless filters. Suspension haydite bed thickness 1～2m, the suspension haydite that is 8～12mm by particle diameter is piled up and is formed,The space of filtrate fluidisation spatial limitation between lower filter screen and filter plate. Suspension haydite adopts shale raw material, through broken, dry,After abrasive dust, granulation, in rotary kiln, fire, the haydite of coming out of the stove screening 8～12mm particle diameter, then water flotation gained floating haydite,Its water infiltration grain density 0.9～1.1g/cm3. Active-carbon bed thickness 1.5～2m, is positioned at filter plate top. Active carbon used isWater purification ature of coal granular activated carbon, particle diameter 1.5～3mm, water infiltration grain density 1.4～1.6g/cm3, iodine sorption value >=800mg/g,Methylenum careuleum adsorptive value >=120mg/g, intensity >=85%.
Gas flushing gas distribution pipe 17 of the present invention is positioned at fenestra aeration tube 21 belows, can be used as the support of fenestra aeration tube. FenestraAeration tube 21 is positioned at lower filter screen 7 belows, can be used as the support of lower filter screen 7. Lower filter screen is aperture 4～5mm stainless (steel) wire,For support suspension ceramic grain filter.
The present invention's application suspension haydite-active carbon double layer filter purifies micro-polluted raw, is applicable to adopting " coagulation-precipitation-outstandingFloating haydite-active carbon double layer filter-sand filtration-sterilization " advanced water treatment processing technological flow, can effectively prevent rawThing leaks.
Application suspension haydite-active carbon double layer filter is processed the method for former water: that allocates intake chamber 1 into treats that drainage is by water inlet pipe 2Import distribution channel 4, enter water distributing area, bottom, filter tank 6 by distributing hole 5, enter with stockless filter by lower filter screen 7 and filter plate 9Row slight drag water distribution, will treat that drainage is uniform to filtering surface below lower filter screen; The fenestra aeration tube 20 that is positioned at lower filter screen below willCompressed air from aeration blower 22 is uniform to filtering surface below lower filter screen, and above flow and mix in the same way with treating drainage,Then active-carbon bed 10 on the suspension haydite bed 8 through lower filter screen 7 and filter plate 9 and filter plate 9, with suspension haydite andThe biomembrane contact of activated carbon surface growth, by mass transfer and oxygen supply, removes ammonia nitrogen, organic matter in water, smells taste material;Filter plate 9 low suspension haydites are held back most of turbidity under microdilatancy state, and remove a huge sum of money by haydite surface catalyzed oxidationBelong to; On filter plate 9, active carbon adsorbs under low turbid condition, realizes the deep purifying for the treatment of drainage; Water after treatment is from exhalant regionFall into outlet canal through effluent weir.
The present invention's haydite-active carbon double layer filter that suspends need to regularly carry out air water and combines flushing, removes the turbidity that filtrate is held backMaterial and aging biomembrane, the biochemical activity of guarantee filtrate. In the time that need to rinsing, suspension haydite bed 8 adopts lower draining punchingWash, close water intaking valve 3, open gas flushing air blast 19, the gas flushing gas distribution pipe 17 below lower filter screen will be from gas flushingThe compressed air of air blast 19 is uniform to filtering surface, and the water infiltration grain density of suspension haydite 8 and the density of water are very approaching, thereforeNeed backwash rate lower, haydite filter bed 8 fluidisation completely that suspends when gas flushing, by suspension from suspension haydite 8Wash-out, then opening water discharge valve 24, the flushing water that contains suspension is discharged pond from drainpipe 23 through distribution channel. OutstandingUnder floating haydite bed 8 initial filter protections, active-carbon bed 10 flushing cycles reach 8～10d. In the time that active-carbon bed 10 need to rinseIn employing, draining is rinsed, and after rinsing suspension haydite bed 8, closes draining valve 24, opens flush water pump 16 and backwash water valve15, flushing water enters distribution channel 4 from water wash tub pipe 14, enters water distributing area, bottom, filter tank 6, in lower filter by distributing hole 5The uniform stockless filter that passes filter plate 9 to the air mixing upper reaches that filtering surface is allocated into gas flushing gas distribution pipe 17 in net 7 belows, to workProperty charcoal bed 10 carries out air water and combines flushing, and the flushing water that contains suspension enters effluent trough 13 by effluent weir 12. When formerOxygen in water deficiency, or in former water, smell taste material and exceed standard while needing aeration stripping, aeration blower 22 opened, at lower filter screenExpose oneself the in the future compressed air of air purge air blast 22 of the fenestra aeration tube 20 of below is uniform to filtering surface, mixes in the same way upper reaches with water,Contact with active-carbon bed 10 biomembrane with suspension haydite bed 8, by mass transfer and oxygen supply, remove ammonia nitrogen in water, organic matter,Smell taste material and iron and manganese etc. It is very little that double layer filter rinses front and back loss of flood peak variation, adopts concentrated blast aeration systemCan not cause aeration inequality between each filter tank, can reduce in a large number air blast number of units, avoid complicated airflow balance measure.
Claims (5)
1. application suspension haydite-active carbon double layer filter is processed the method for former water, it is characterized in that: the drainage for the treatment of of allocating intake chamber into imports distribution channel by water inlet pipe, enter water distributing area, bottom, filter tank by distributing hole, carry out slight drag water distribution by lower filter screen and filter plate and filter, will treat that drainage is uniform to filtering surface below lower filter screen; The fenestra aeration tube that is positioned at lower filter screen below is uniform to filtering surface below lower filter screen by the compressed air from aeration blower, above flow and mix in the same way with treating drainage, then active-carbon bed on the suspension haydite bed through lower filter screen and filter plate and filter plate, contact with the biomembrane of filter material surface growth, by mass transfer and oxygen supply, remove ammonia nitrogen, organic matter in water, smell taste material; Filter plate low suspension haydite is held back most of turbidity under microdilatancy state, and by haydite surface catalyzed oxidation removal heavy metal; On filter plate, active carbon adsorbs under low turbid condition, realizes the deep purifying for the treatment of drainage; Water after treatment falls into outlet canal from exhalant region through effluent weir;
Described suspension haydite-active carbon double layer filter comprises intake chamber, distribution channel, up-flow suspension haydite-active carbon double layer filter body and effluent trough; Intake chamber and distribution channel lay respectively at the upper and lower of the same side of up-flow suspension haydite-active carbon double layer filter body, and effluent trough is positioned at the top of distribution channel opposite one side; Intake chamber is communicated with distribution channel by water inlet pipe, and distribution channel is communicated with water wash tub pipe and drainpipe respectively; Distribution channel is also communicated with up-flow suspension haydite-active carbon double layer filter body lower end by distributing hole; In the body of filter tank, be followed successively by from top to bottom water distributing area, gas flushing gas distribution pipe, fenestra aeration tube, lower filter screen, suspension haydite bed, filter plate, active-carbon bed and exhalant region; Exhalant region is connected with outlet canal by effluent weir; Gas flushing gas distribution pipe is connected with gas flushing air blast by gas flushing pipe; Fenestra aeration tube is connected with gas flushing air blast by aeration tube; Run through filter plate and be evenly arranged multiple stockless filters; The thickness of described suspension haydite bed is 1～2m, and the suspension haydite that is 8～12mm by particle diameter is piled up and formed, the water infiltration grain density 0.9～1.1g/cm of suspension haydite3; Described active-carbon bed thickness is 1.5～2m, and the active carbon that is 1.5～3mm by particle diameter is piled up and formed, the water infiltration grain density 1.4～1.6g/cm of active carbon3；
Described water inlet pipe is provided with water intaking valve; Gas flushing gas distribution pipe is positioned at fenestra aeration tube below;
Described water wash tub pipe connects water and rinses main, rinses main be connected with flush water pump by water, and the pipeline that water wash tub pipe is connected with distribution channel is provided with water and rushes valve.
2. apply according to claim 1 suspension haydite-active carbon double layer filter and process the method for former water, it is characterized in that: described lower filter screen is aperture 4～5mm stainless (steel) wire.
3. apply according to claim 1 suspension haydite-active carbon double layer filter and process the method for former water, it is characterized in that: described filter plate adopts armored concrete filter plate.
4. apply according to claim 1 suspension haydite-active carbon double layer filter and process the method for former water, it is characterized in that: described water inlet pipe is provided with water intaking valve; Drainpipe is provided with draining valve.
5. apply according to claim 1 suspension haydite-active carbon double layer filter and process the method for former water, it is characterized in that: described distributing hole is multiple, multiple distributing holes are distributed on the pool wall that distribution channel is connected with pond body.
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| CN105254080B (en) * | 2015-09-23 | 2017-07-18 | 煤科集团杭州环保研究院有限公司 | A kind of underground coal mine fully-mechanized mining working emulsifying liquid waste water processing unit and method |
| CN107500417A (en) * | 2016-09-30 | 2017-12-22 | 华北理工大学 | Intend pipeline water-purifying system |
| CN114044587B (en) * | 2021-11-18 | 2024-03-12 | 华南理工大学 | Manganese oxide film loaded expanded bed filter and method for removing thallium by adsorption by using same |
| CN115231768A (en) * | 2022-06-22 | 2022-10-25 | 华南理工大学 | Light ceramsite expansion bed built-in activated carbon filter and method for purifying water by applying same |
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| CN1401592A (en) * | 2002-09-04 | 2003-03-12 | 清华大学 | Double-layer filter material biological aeration filter pond |
| CN101774687A (en) * | 2010-03-19 | 2010-07-14 | 哈尔滨工业大学 | Method for treating water of polluted water source by using double-stage aeration bio-filter |
| CN103172165A (en) * | 2013-03-29 | 2013-06-26 | 华南理工大学 | Suspended ceramic biological aerated pool and method for treating raw water by applying suspended ceramsite biological aerated pool |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1401592A (en) * | 2002-09-04 | 2003-03-12 | 清华大学 | Double-layer filter material biological aeration filter pond |
| CN101774687A (en) * | 2010-03-19 | 2010-07-14 | 哈尔滨工业大学 | Method for treating water of polluted water source by using double-stage aeration bio-filter |
| CN103172165A (en) * | 2013-03-29 | 2013-06-26 | 华南理工大学 | Suspended ceramic biological aerated pool and method for treating raw water by applying suspended ceramsite biological aerated pool |
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