CN104909460A - Porous nitrogen and phosphorus removal filler for artificial wetland and preparation method of porous nitrogen and phosphorus removal filler - Google Patents
Porous nitrogen and phosphorus removal filler for artificial wetland and preparation method of porous nitrogen and phosphorus removal filler Download PDFInfo
- Publication number
- CN104909460A CN104909460A CN201510253822.5A CN201510253822A CN104909460A CN 104909460 A CN104909460 A CN 104909460A CN 201510253822 A CN201510253822 A CN 201510253822A CN 104909460 A CN104909460 A CN 104909460A
- Authority
- CN
- China
- Prior art keywords
- filler
- porosity
- preparation
- stirrer
- denitrogenation dephosphorizing
- 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
Landscapes
- Water Treatment By Sorption (AREA)
- Biological Treatment Of Waste Water (AREA)
- Treating Waste Gases (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses porous nitrogen and phosphorus removal filler for an artificial wetland and a preparation method of the porous nitrogen and phosphorus removal filler. The preparation method comprises the following steps: uniformly stirring sands, Yunnan red soil, cement, quick lime, gypsum and water which are metered in proportion by weight to prepare mixed slurry and putting the mixed slurry into a pouring stirrer; preparing aluminum powder into a suspension liquid and putting the suspension liquid into the stirrer before being poured; discharging and pouring a material by the pouring stirrer into a die to prepare a blank; foaming and initially setting the poured blank at 50-70 DEG C for 1.5-2 hours to obtain coarse filler; standing the coarse filler for initial maintaining until the coarse filler has cutting strength and cutting the coarse filler; and autoclaving the cut coarse filler to obtain the porous nitrogen and phosphorus removal filler. The filler disclosed by the invention is used for sewage treatment, is light in volume-weight, stable in chemical property, liable to biofilm culturing, great in porosity and high in mechanical strength, and has an excellent phosphorus removal property and a relatively good ammonia nitrogen removing effect.
Description
Technical field
The invention belongs to environmental technology field, be specifically related to a kind of preparation method of the porosity denitrogenation dephosphorizing filler for artificial swamp.
Background technology
Constructed Wetland For Purifying sewage mainly contains three large key elements: filler matrix, plant and microorganism, and wherein filler is the main place of sewage disposal, directly removes pollutent by effects such as interception, filtration, absorption, precipitations.
In now widely used filler, no matter be traditional natural stuffing (gravel, zeolite, Wingdale etc.) or industry byproduct (lime-ash, blast furnace slag, slag etc.), there is the problems such as specific surface area is not high, porosity, Nitrogen/Phosphorus Removal are poor.Yunnan laterite is Yunnan Province distribution soil type the most widely, and unique Yunnan Mountains weathering condition makes the Fe in Yunnan laterite
2o
3and TiO
2content is far above other regional laterite, and Yunnan laterite has very high pollution and removes potentiality, but directly laterite is existed the problems such as hydraulic load is little, easy blocking as water treatment matrix.
Summary of the invention
The object of the invention is to for prior art above shortcomings, a kind of preparation method of the porosity denitrogenation dephosphorizing filler for artificial swamp is provided.The filler related in the present invention is artificial products, by special manufacture method, forms that a kind of lightweight, intensity are high, stable in properties, porosity large, good denitrogenation and dephosphorization effect, and is applicable to the water treatment filler of various scale artificial swamp and Ecological Disposal engineering.
The object of the invention is to be achieved through the following technical solutions:
The present invention relates to a kind of preparation method of the porosity denitrogenation dephosphorizing filler for artificial swamp, described method comprises the steps:
A, stir make mixed slurry by after sand, Yunnan laterite, cement, unslaked lime, gypsum, water by weight formula rate metering, put into cast stirrer;
B, aluminium powder is made the suspension of mass concentration 5 ~ 7% by metering, before cast, put into cast stirrer;
C, cast stirrer blowing are poured into mould, obtained base substrate;
The base substrate that D, step C pour into carries out getting angry initial set under 50 ~ 70 DEG C of conditions, and the time is 1.5 ~ 2h, obtains rough filler;
E, described rough filler be quiet stop just supporting and reach cutting intensity after, cut; The rough filler of well cutting is carried out steam press maintenance, obtains described porosity denitrogenation dephosphorizing filler.
In the present invention, Yunnan laterite is higher containing Fe, Al activating oxide, and phosphorus removal property is obviously better than latosol, the red earth of southeast.If be changed to other laterite, then phosphor-removing effect will decline.
In the present invention, through the getting angry of 1.5 ~ 2h of step D, produce bubble and substantially complete, follow-up steam pressurized maintenance realizes filler rapid curing shaping further.
As optimal technical scheme, by the mass percent accounting for raw material gross weight, sand 20 ~ 25%, Yunnan laterite 15 ~ 20%, cement 5 ~ 7%, unslaked lime 9 ~ 12%, gypsum 1.6 ~ 2%, aluminium powder 0.05 ~ 0.07%, water 38 ~ 43%.
As optimal technical scheme, in step B, described suspension 1 ~ 2min before cast puts into cast stirrer.
As optimal technical scheme, in step C, before cast stirrer blowing is poured into mould, should control slip temperature before cast is 35 ~ 38 DEG C.
As optimal technical scheme, control the temperature of slip before cast by steam heating.
As optimal technical scheme, described steam press maintenance is the steam-cured 6 ~ 10h of constant voltage, and the vapor pressure of employing is 1.0 ~ 1.5MPa, and steam curing temperature is 180 ~ 200 DEG C.
Compared with prior art, the present invention has following beneficial effect:
1, filler is convenient for production, and can make full use of air-entrained concrete building block brick production unit universal at present, mechanization degree is high, and the cycle is short, and production cost is low.
2, because filler contains pore even and tiny in a large number, considerably increase the specific surface area of filler, can by pollutent active adsorption, filter and retain;
3, filler piles up voidage greatly, can reach about 50%, simultaneously for microorganism growth provides good growing environment, be beneficial to the pollutents such as microbiological deterioration COD, ammonia nitrogen;
4, filler proportion is less, lightweight, and during practical application, artificial use cost is lower.
5, given full play to the dephosphorization characteristics of Yunnan laterite itself, there is outstanding phosphorus removal property, far exceed conventional filler.
6, physical strength is higher, anti-extrusion, and long period of soaking is not easily broken, can ensure the long-acting operation of Sewage treatment systems.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is membrane bioreactor tailwater depth science and engineering journey floor plan schematic diagram everywhere;
Wherein, 1 is great Li road, and 2 is aerobic ponds, and 3 is surface current artificial wetland, and 4 is horizontal subsurface flow wetland, and 5 for going out pool.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, can also make certain adjustments and improvements.These all belong to protection scope of the present invention.
embodiment 1
The present embodiment relates to a kind of porosity denitrogenation dephosphorizing filler for artificial swamp, adopt sand, Yunnan laterite, cement, unslaked lime, gypsum, aluminium powder, water etc. to be main raw material, utilize steam pressurized to produce the method for bubble to the process of being fixed of Yunnan laterite, make porosity material.
Concrete preparation mainly comprises following processing step:
1, by the mass percent accounting for raw material gross weight, sand 20%, Yunnan laterite 19%, cement 5%, unslaked lime 10.93%, gypsum 2%, water 43% are stirred and make mixed slurry, the slip measured puts into cast stirrer;
2, aluminium powder 0.07% is made suspension, stir about 30s, the suspension be stirred about 1min before cast and put into cast stirrer;
3, slip temperature before cast should reach 35 ~ 38 DEG C, as temperature can lead to steam heating not;
4, pour into a mould stirrer blowing and be poured into mould;
5, the base substrate poured into carries out getting angry initial set under 60 DEG C of conditions, and the time is 1.8h;
6, quiet stop just supporting reach cutting intensity after, need to cut by practical application;
7, the even filler of well cutting is drawn in still carry out steam press maintenance, the steam-cured time 8h of constant voltage, vapor pressure 1.3MPa, temperature 190 DEG C.
8, maintenance completes and namely makes uniform pores denitrogenation dephosphorizing filler.
Carry out performance test to obtained porosity denitrogenation dephosphorizing filler, specific surface area is 4.7 × 10
5cm
2/ g, phosphorus loading capacity is 5.59mg/g, and ultimate compression strength is 3.5Mpa, and tap density is 0.85g/cm
3.
In the present invention, step 7 can not adopt routine to fire, because conventional firing temperature is wayward, more than 400 degree, then degradation is obvious, the most important thing is to fire easily to cause being heated uneven, must select steam pressurized.
embodiment 2
The present embodiment relates to a kind of porosity denitrogenation dephosphorizing filler for artificial swamp, adopt sand, Yunnan laterite, cement, unslaked lime, gypsum, aluminium powder, water etc. to be main raw material, utilize steam pressurized to produce the method for bubble to the process of being fixed of Yunnan laterite, make porosity material.
Concrete preparation mainly comprises following processing step:
1, by the mass percent accounting for raw material gross weight, sand 23%, Yunnan laterite 15%, cement 7%, unslaked lime 12%, gypsum 1.6%, water 41.35% are stirred and make mixed slurry, the slip measured puts into cast stirrer;
2, aluminium powder 0.05% is made suspension, stir about 30s, the suspension be stirred about 2min before cast and put into cast stirrer;
3, slip temperature before cast should reach 35 ~ 38 DEG C, as temperature can lead to steam heating not;
4, pour into a mould stirrer blowing and be poured into mould;
5, the base substrate poured into carries out getting angry initial set under 50 DEG C of conditions, and the time is 2h;
6, quiet stop just supporting reach cutting intensity after, need to cut by practical application;
7, the even filler of well cutting is drawn in still carry out steam press maintenance, the steam-cured time 6h of constant voltage, vapor pressure 1.0MPa, temperature 200 DEG C.
8, maintenance completes and namely makes uniform pores denitrogenation dephosphorizing filler.
Carry out performance test to obtained porosity denitrogenation dephosphorizing filler, specific surface area is 5.2 × 10
5cm
2/ g, phosphorus loading capacity is 5.30mg/g, and ultimate compression strength is 3.2Mpa, and tap density is 0.82g/cm
3.
embodiment 3
The present embodiment relates to a kind of porosity denitrogenation dephosphorizing filler for artificial swamp, adopt sand, Yunnan laterite, cement, unslaked lime, gypsum, aluminium powder, water etc. to be main raw material, utilize steam pressurized to produce the method for bubble to the process of being fixed of Yunnan laterite, make porosity material.
Concrete preparation mainly comprises following processing step:
1, by the mass percent accounting for raw material gross weight, sand 25%, Yunnan laterite 20%, cement 6%, unslaked lime 9%, gypsum 1.94%, water 38% are stirred and make mixed slurry, the slip measured puts into cast stirrer;
2, aluminium powder 0.06% is made suspension, stir about 30s, the suspension be stirred about 1min before cast and put into cast stirrer;
3, slip temperature before cast should reach 35 ~ 38 DEG C, as temperature can lead to steam heating not;
4, pour into a mould stirrer blowing and be poured into mould;
5, the base substrate poured into carries out getting angry initial set under 70 DEG C of conditions, and the time is 1.5h;
6, quiet stop just supporting reach cutting intensity after, need to cut by practical application;
7, the even filler of well cutting is drawn in still carry out steam press maintenance, the steam-cured time 10h of constant voltage, vapor pressure 1.5MPa, temperature 180 DEG C.
8, maintenance completes and namely makes uniform pores denitrogenation dephosphorizing filler.
Carry out performance test to obtained porosity denitrogenation dephosphorizing filler, specific surface area is 4.2 × 10
5cm
2/ g, phosphorus loading capacity is 5.02mg/g, and ultimate compression strength is 3.5Mpa, and tap density is 0.89g/cm
3.
comparative example 1
The present embodiment relates to a kind of porosity denitrogenation dephosphorizing filler for artificial swamp, and concrete preparation mainly comprises following processing step:
1, by the mass percent accounting for raw material gross weight, sand 10%, Yunnan laterite 29%, cement 5%, unslaked lime 10.93%, gypsum 2%, water 43% are stirred and make mixed slurry, the slip measured puts into cast stirrer;
2, aluminium powder 0.07% is made suspension, stir about 30s, the suspension be stirred about 1min before cast and put into cast stirrer;
3, slip temperature before cast should reach 35 ~ 38 DEG C, as temperature can lead to steam heating not;
4, pour into a mould stirrer blowing and be poured into mould;
5, the base substrate poured into carries out getting angry initial set under 60 DEG C of conditions, and the time is 1.8h;
6, quiet stop just supporting reach cutting intensity after, need to cut by practical application;
7, the even filler of well cutting is drawn in still carry out steam press maintenance, the steam-cured time 8h of constant voltage, vapor pressure 1.3MPa, temperature 190 DEG C.
8, maintenance completes and namely makes uniform pores denitrogenation dephosphorizing filler.
Carry out performance test to obtained porosity denitrogenation dephosphorizing filler, specific surface area is 2.5 × 10
5cm
2/ g, phosphorus loading capacity is 2.16mg/g, and ultimate compression strength is 4Mpa, and tap density is 1.1g/cm
3.
embodiment 4
The present embodiment relates to the application of the porosity denitrogenation dephosphorizing filler for artificial swamp of the present invention--shangguan village, Xi Zhou town, Dali Bai Autonomous prefecture, Yunnan Dali membrane bioreactor tailwater depth science and engineering journey everywhere.
Project treatment scale is 300m
3/ d, floor space 8 mu, without power consumption, service 3483, shangguan village villager.The water inlet of tail engineering of water treatment is facultative aerobic membrane bioreactor water outlet, meet " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level A standard, the water outlet of this engineering reaches " water environment quality standard " (GB3838-2002) surface water IV class standard.
As shown in Figure 1, along great Li road 1 parallel direction, be provided with aerobic ponds 2 successively, surface current artificial wetland 3 for process engineering floor plan schematic diagram, horizontal subsurface flow wetland 4 and go out pool 5.
Wherein: the long 25m of first step aerobic ponds, available depth 1.5m.The long 75m of surface-flow, available depth 0.6m, aquatic crops such as plantation Wildcelery Herb, caraway etc.Horizontal subsurface flow wetland establishes 2 grades, useful area 400m
2, filler thickness 1.3m, wherein the second stage adopts the embodiment of the present invention 1 self-made fill, upper strata earthing, the thick 0.2m of soil layer, upper turfing.In June, 2014 formally puts into operation.After tail water treatment wetland engineering puts into operation, water outlet ammonia nitrogen, TP all can meet " water environment quality standard " (GB3838-2002) surface water IV class standard, and wherein water outlet total phosphorus mean concns is 0.08mg/L, ammonia nitrogen 1.15mg/L.This engineering is that improving of Erhai, In Dali Area, yunnan periphery sewage treatment facility provides engineering mimoir.
In sum, the present invention adopts sand, Yunnan laterite, cement, unslaked lime, gypsum, aluminium powder, water etc. to be main raw material, utilizes steam pressurized to produce the method for bubble to the process of being fixed of Yunnan laterite, makes porosity material.This material is under the prerequisite of high porosity advantage playing filler, play the distinctive phosphorus removal property of Yunnan laterite, make it have higher physical strength and larger loading capacity, be applicable to being applied to various scale artificial swamp and Ecological Disposal engineering, good denitrogenation and dephosphorization effect.
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (6)
1., for a preparation method for the porosity denitrogenation dephosphorizing filler of artificial swamp, it is characterized in that, described method comprises the steps:
A, sand, Yunnan laterite, cement, unslaked lime, gypsum, water are stirred and makes mixed slurry, put into cast stirrer;
B, aluminium powder is made the suspension of mass concentration 5 ~ 7%, before cast, put into cast stirrer;
C, cast stirrer blowing are poured into mould, obtained base substrate;
The base substrate that D, step C pour into carries out getting angry initial set under 50 ~ 70 DEG C of conditions, and the time is 1.5 ~ 2h, obtains rough filler;
E, described rough filler be quiet stop just supporting and reach cutting intensity after, cut; The rough filler of well cutting is carried out steam press maintenance, obtains described porosity denitrogenation dephosphorizing filler.
2. the preparation method of the porosity denitrogenation dephosphorizing filler for artificial swamp according to claim 1, it is characterized in that, by the mass percent accounting for raw material gross weight, sand 20 ~ 25%, Yunnan laterite 15 ~ 20%, cement 5 ~ 7%, unslaked lime 9 ~ 12%, gypsum 1.6 ~ 2%, aluminium powder 0.05 ~ 0.07%, water 38 ~ 43%.
3. the preparation method of the porosity denitrogenation dephosphorizing filler for artificial swamp according to claim 1, is characterized in that, in step B, described suspension 1 ~ 2min before cast puts into cast stirrer.
4. the preparation method of the porosity denitrogenation dephosphorizing filler for artificial swamp according to claim 1, is characterized in that, in step C, before cast stirrer blowing is poured into mould, controlling slip temperature before cast is 35 ~ 38 DEG C.
5. the preparation method of the porosity denitrogenation dephosphorizing filler for artificial swamp according to claim 4, is characterized in that, controls the temperature of slip before cast by steam heating.
6. the preparation method of the porosity denitrogenation dephosphorizing filler for artificial swamp according to claim 1, is characterized in that, described steam press maintenance is the steam-cured 6 ~ 10h of constant voltage, and the vapor pressure of employing is 1.0 ~ 1.5MPa, and steam curing temperature is 180 ~ 200 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510253822.5A CN104909460B (en) | 2015-05-18 | 2015-05-18 | Porosity denitrogenation dephosphorizing filler for artificial swamp and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510253822.5A CN104909460B (en) | 2015-05-18 | 2015-05-18 | Porosity denitrogenation dephosphorizing filler for artificial swamp and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104909460A true CN104909460A (en) | 2015-09-16 |
| CN104909460B CN104909460B (en) | 2017-06-09 |
Family
ID=54078972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510253822.5A Active CN104909460B (en) | 2015-05-18 | 2015-05-18 | Porosity denitrogenation dephosphorizing filler for artificial swamp and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104909460B (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106082524A (en) * | 2016-05-24 | 2016-11-09 | 安徽美自然环境科技有限公司 | The material of ammonia nitrogen and methods for making and using same thereof in a kind of deep removal water |
| CN106083180A (en) * | 2016-06-23 | 2016-11-09 | 安徽美自然环境科技有限公司 | The preparation method of a kind of dephosphorization filler and be filled with the dephosphorization equipment of this filler |
| CN107670635A (en) * | 2017-11-23 | 2018-02-09 | 广东润锦环保产业有限公司 | A kind of sewage disposal filler, preparation method and purposes |
| CN110498659A (en) * | 2019-08-30 | 2019-11-26 | 杭州沁霖生态科技有限公司 | A kind of lightweight dephosphorization granule filter material and preparation method thereof |
| CN110697882A (en) * | 2019-10-15 | 2020-01-17 | 兰州康顺环保科技有限责任公司 | Method for manufacturing flow separation ball carrier for sewage treatment |
| CN110734129A (en) * | 2019-11-06 | 2020-01-31 | 合肥学院 | nanometer zero-valent metal porous functional material prepared based on meteorite, and preparation method and application thereof |
| CN110734133A (en) * | 2019-11-06 | 2020-01-31 | 合肥学院 | nanometer zero-valent iron-nickel composite porous material, preparation method and application thereof |
| CN110921835A (en) * | 2019-11-29 | 2020-03-27 | 中国中元国际工程有限公司 | Efficient phosphorus removal and anti-blocking engineering wetland system and method based on plant and chemical purification mode |
| CN110981419A (en) * | 2019-11-19 | 2020-04-10 | 上海市园林设计研究总院有限公司 | Dephosphorization filler suitable for Ganzhou region and preparation method thereof |
| CN113173765A (en) * | 2021-04-16 | 2021-07-27 | 浙江尼可环保科技有限公司 | Wetland composite filler applied to treatment of rural domestic sewage and preparation method thereof |
| WO2021196344A1 (en) * | 2020-04-03 | 2021-10-07 | 中国科学院城市环境研究所 | Standard modular filler and horizontal subsurface flow constructed wetland |
| CN114684910A (en) * | 2022-05-05 | 2022-07-01 | 重庆昂为环保产业有限公司 | Nitrogen and phosphorus removal filler and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103739058A (en) * | 2014-01-06 | 2014-04-23 | 上海交通大学 | Sewage reinforced phosphorous removal packing and preparation method thereof |
-
2015
- 2015-05-18 CN CN201510253822.5A patent/CN104909460B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103739058A (en) * | 2014-01-06 | 2014-04-23 | 上海交通大学 | Sewage reinforced phosphorous removal packing and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 叶利升: ""红土填料人工湿地异位净化河水技术研究"", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106082524A (en) * | 2016-05-24 | 2016-11-09 | 安徽美自然环境科技有限公司 | The material of ammonia nitrogen and methods for making and using same thereof in a kind of deep removal water |
| CN106083180A (en) * | 2016-06-23 | 2016-11-09 | 安徽美自然环境科技有限公司 | The preparation method of a kind of dephosphorization filler and be filled with the dephosphorization equipment of this filler |
| CN107670635B (en) * | 2017-11-23 | 2020-07-28 | 广东润锦环保产业有限公司 | Sewage treatment filler, preparation method and application |
| CN107670635A (en) * | 2017-11-23 | 2018-02-09 | 广东润锦环保产业有限公司 | A kind of sewage disposal filler, preparation method and purposes |
| CN110498659A (en) * | 2019-08-30 | 2019-11-26 | 杭州沁霖生态科技有限公司 | A kind of lightweight dephosphorization granule filter material and preparation method thereof |
| CN110697882A (en) * | 2019-10-15 | 2020-01-17 | 兰州康顺环保科技有限责任公司 | Method for manufacturing flow separation ball carrier for sewage treatment |
| CN110734129A (en) * | 2019-11-06 | 2020-01-31 | 合肥学院 | nanometer zero-valent metal porous functional material prepared based on meteorite, and preparation method and application thereof |
| CN110734133A (en) * | 2019-11-06 | 2020-01-31 | 合肥学院 | nanometer zero-valent iron-nickel composite porous material, preparation method and application thereof |
| CN110734133B (en) * | 2019-11-06 | 2022-04-15 | 合肥学院 | Nano zero-valent iron-nickel composite porous material, preparation method and application thereof |
| CN110981419A (en) * | 2019-11-19 | 2020-04-10 | 上海市园林设计研究总院有限公司 | Dephosphorization filler suitable for Ganzhou region and preparation method thereof |
| CN110981419B (en) * | 2019-11-19 | 2022-04-08 | 上海市园林设计研究总院有限公司 | Dephosphorization filler suitable for Ganzhou region and preparation method thereof |
| CN110921835A (en) * | 2019-11-29 | 2020-03-27 | 中国中元国际工程有限公司 | Efficient phosphorus removal and anti-blocking engineering wetland system and method based on plant and chemical purification mode |
| CN110921835B (en) * | 2019-11-29 | 2024-01-09 | 中国中元国际工程有限公司 | Efficient dephosphorization anti-blocking engineering wetland system and method based on plant and chemical purification mode |
| WO2021196344A1 (en) * | 2020-04-03 | 2021-10-07 | 中国科学院城市环境研究所 | Standard modular filler and horizontal subsurface flow constructed wetland |
| CN113173765A (en) * | 2021-04-16 | 2021-07-27 | 浙江尼可环保科技有限公司 | Wetland composite filler applied to treatment of rural domestic sewage and preparation method thereof |
| CN114684910A (en) * | 2022-05-05 | 2022-07-01 | 重庆昂为环保产业有限公司 | Nitrogen and phosphorus removal filler and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104909460B (en) | 2017-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104909460A (en) | Porous nitrogen and phosphorus removal filler for artificial wetland and preparation method of porous nitrogen and phosphorus removal filler | |
| CN103739058B (en) | A kind of reinforced sewage dephosphorization filler and preparation method thereof | |
| CN107721270B (en) | Method for preparing non-sintered water permeable brick by using municipal sludge | |
| CN108774041B (en) | Water permeable brick using artificial carbonized steel slag balls as aggregate and preparation method thereof | |
| CN103936346B (en) | A kind of haydites of book structure pervious ecological concrete | |
| CN110105004B (en) | Preparation method of sludge cured brick | |
| CN103833298B (en) | Slop protection material and preparation method thereof | |
| CN110698141B (en) | Composite foam light soil and preparation method thereof | |
| CN113264723B (en) | High-performance green water permeable brick based on facultative aerobic microbe mineralization and preparation method thereof | |
| CN102775101A (en) | Baking-free brick made of aluminum sludge of water works | |
| CN102079105A (en) | Preparation method of ecological embankment type porous concrete special for plant growing | |
| CN113044963A (en) | Active biological filter material and preparation method and application thereof | |
| CN105174855A (en) | C30 micro-expansive self-compacting concrete | |
| CN102503295B (en) | Non-sintered brick prepared from river and lake silt and preparation process thereof | |
| CN115385593A (en) | Full-solid waste nano calcium silicate hydrate gel early strength agent and preparation method and application thereof | |
| CN109809773A (en) | A kind of eco-concrete and the preparation method and application thereof | |
| CN105084838B (en) | Pervious concrete for highway engineering | |
| CN106630885A (en) | High-perviousness permeable filter brick applicable to sponge city construction and preparation technology of high-perviousness permeable filter brick | |
| CN108609948B (en) | Preparation method of pervious concrete with high steel slag content | |
| CN109711634A (en) | A kind of regenerative pervious brick mixing proportion design method based on target coefficient of permeability | |
| CN102951887A (en) | Red mud-added ecological concrete and application of same in sewage purification | |
| CN105906268B (en) | A kind of dredging silt no-firing brick and preparation method thereof | |
| CN111995306A (en) | Non-fired ceramsite based on urban river sludge and regenerated garbage and preparation method thereof | |
| CN111807504A (en) | Dephosphorization and denitrification wetland filler and preparation method thereof | |
| CN113248075A (en) | Preparation and use method of wetland filler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |