CN110252241A - Based on KMnO4The method that dewatering coupling catalytic pyrolysis prepares charcoal base function water-purifying material is strengthened in-Fe (II) conditioning - Google Patents
Based on KMnO4The method that dewatering coupling catalytic pyrolysis prepares charcoal base function water-purifying material is strengthened in-Fe (II) conditioning Download PDFInfo
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- CN110252241A CN110252241A CN201910412837.XA CN201910412837A CN110252241A CN 110252241 A CN110252241 A CN 110252241A CN 201910412837 A CN201910412837 A CN 201910412837A CN 110252241 A CN110252241 A CN 110252241A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4875—Sorbents characterised by the starting material used for their preparation the starting material being a waste, residue or of undefined composition
- B01J2220/4887—Residues, wastes, e.g. garbage, municipal or industrial sludges, compost, animal manure; fly-ashes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/103—Arsenic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
Abstract
The present invention provides a kind of based on KMnO4The method that dewatering coupling catalytic pyrolysis prepares charcoal base function water-purifying material is strengthened in-Fe (II) conditioning, comprising the following steps: adds KMnO into sludge while stirring4- Fe (II) forms mud mixed liquid；Mud mixed liquid is stirred under room temperature, is then centrifuged for, dewatered sludge is obtained；Dewatered sludge is dried, dewatered sludge is obtained；Dewatered sludge is subjected to carbonization treatment under nitrogen atmosphere protection, obtains Mn-Fe bimetallic function carbon material crude product；Benefit is washed with deionized Mn-Fe bimetallic function carbon material crude product, filtering, dry, is milled to powdered to get to Mn-Fe-SBC adsorbent material.Mn-Fe-SBC adsorbent material produced by the present invention can be applied to arsenic-containing waste water and Organic Pollutants wastewater treatment, and adsorption effect performance is good.
Description
Technical field
The present invention relates to environment recycling sludge and technical field of waste water processing, more particularly to one kind to be based on KMnO4-Fe
(II) method that dewatering coupling catalytic pyrolysis prepares charcoal base function water-purifying material is strengthened in conditioning.
Background technique
With the continuous improvement of China's level of urbanization, sewage treatment facility builds high speed development.In municipal sewage biochemistry
During processing, a large amount of pollutants by enrichment, concentration and be transferred among sludge.Sludge belonged in the Sewage Biological Treatment stage
Important by-product is also considered as one of the important sources for leading to water environment secondary pollution.According to statistics, the sewage treatment in cities and towns
The sludge of factory not only water content it is high, it is perishable, have a strong stink, and contain a large amount of germ body and helminth, Yi Jizhong
Multi-metal.Therefore, if sludge arbitrarily discharges, appropriate processing is obtained not in time, it will cause to the living environment of the mankind
It seriously threatens.
The traditional treatment method of sludge has: filling, fills out sea, sludge composting and agricultural, sludge incineration and ocean dumping etc.
Reason, however since usually there is occupy a large amount of soil, and the disadvantage in the presence of pollution air and underground water for these processing modes
End, traditional Treatment of Sludge mode can no longer meet the demand of contemporary cities Green Development, the utilization of resources of excess sludge
It is the common trend for the inevitable choice and sludge adjustment technology development for solving sludge accumulation.
Summary of the invention
In view of this, that the present invention provides a kind of raw materials is cheap and easy to get, reaction condition is mild, easy to operate, simple process
Based on KMnO4The method that dewatering coupling catalytic pyrolysis prepares charcoal base function water-purifying material is strengthened in-Fe (II) conditioning.
The present invention provides a kind of based on KMnO4It is net that-Fe (II) conditioning reinforcing dewatering coupling catalytic pyrolysis prepares charcoal base function
The method of water material, comprising the following steps:
S1 adds KMnO into sludge while stirring4- Fe (II) forms mud mixed liquid；
S2, the mud mixed liquid 3h of whipping step S1, is then centrifuged under room temperature, so that the muddy water in mud mixed liquid point
From obtaining dewatered sludge；
Dewatered sludge is dried S3, obtains dewatered sludge (Mn-Fe-SBC)；
The dewatered sludge of step S2 is carried out high temperature cabonization processing under nitrogen atmosphere protection, obtains Mn-Fe bimetallic by S4
Function carbon material crude product；
S5 utilizes the Mn-Fe bimetallic function carbon material crude product of deionized water washing step S4, filter 23~5 time, 60
It is dried in vacuo 12h at DEG C, is milled to powdered to get to Mn-Fe-SBC adsorbent material.
Further, in step S1, KMnO4- Fe (II) is KMnO4And FeSO4.5H2The mixture of O, KMnO4With
FeSO4.5H2The mass concentration dosing ratio of O is 3:1~1:3.
Further, KMnO4Molar concentration be 20 μm of ol/L, FeSO4.5H2The molar concentration of O is 60 μm of ol/L.
Further, sludge used in step S1 is for common sludge, digested sludge or by common sludge and digested sludge
The mixing sludge of composition.
Further, in step S3, the temperature of drying process is 105 DEG C.
Further, in step S4, the temperature of carbonization treatment is 600~800 DEG C.
The present invention also provides utilize to be based on KMnO made from above-mentioned preparation method4Dewatering coupling is strengthened in-Fe (II) conditioning
The charcoal base function water-purifying material of catalytic pyrolysis preparation.
The present invention also provides be based on KMnO using above-mentioned4- Fe (II) conditioning strengthens dewatering coupling catalytic pyrolysis and prepares charcoal
The application for the Mn-Fe-SBC adsorbent material that the method for base function water-purifying material is prepared, the Mn-Fe-SBC adsorbent material energy
Enough it is applied to arsenic-containing waste water and micro- Organic Pollutants wastewater treatment.
Further, arsenic-containing waste water is to contain containing As groundwater, As (III) and As (V) waste water composite waste and municipal wastewater
Arsenic waste water carries out production by common sludge, digested sludge or the mixing sludge being made of common sludge and digested sludge and synthesizes
It arrives.
Due to KMnO4A large amount of extracellular polymerics in the redox reaction process cleavable activated sludge of-Fe (II)
(EPS), while Fe (II) has flocculation, therefore KMnO4- Fe (II) can improve dewatering and the structure spy of activated sludge
Sign；As (III) is higher than As (V) toxicity in aqueous solution and hardly possible removes, however the MnO in Mn-Fe2It can the efficient oxidation As (III)
To As (V), while wherein the presence of iron oxide can effectively adsorb As (V).Also, the characteristic of sludge carbon large specific surface area makes it
It can Organic Pollutants effectively in Adsorption waste water.
The present invention passes through KMnO4Oxidation and Fe (II) flocculation, improve the dewatering of sludge；
KMnO4The introducing of-Fe (II), has been catalyzed the efficiency of pyrolyzing sludge, thus cost needed for reducing the commercial synthesis of sludge carbon material；
With traditional sludge carbon phase ratio, KMnO4The introducing of-Fe (II) improves in the treatment of waste water so that the porosity of sludge carbon increases
Adsorption capacity；Meanwhile the MnO of Mn-Fe-SBC2Oxidation and the suction-operated of iron oxide substantially increase the sludge carbon materials
Expect the treatment effeciency to arsenic-containing waste water；The present invention is raw material using the activated sludge hoarded in sewage disposal process, is passed through
KMnO4Oxidation-flocculation of-Fe (II) first improves sludge synthesis bimetallic function carbon material, recycles bimetallic Mn-Fe dirty
Oxidation-absorption property in peat material handles arsenic-containing waste water, realizes sludge resource utilizationization, while improving arsenic-containing waste water
Treatment effeciency, be a kind of environmental-friendly bimetallic sludge carbon adsorbing material.
Detailed description of the invention
Fig. 1 is 1 different ratio KMnO of the embodiment of the present invention4The sludge CST variation diagram of-Fe (II) opsonic activity sludge；
Fig. 2 is the KMnO of the different dosages of the embodiment of the present invention 14The sludge specific resistance of-Fe (II) opsonic activity sludge changes
Figure；
Fig. 3 is 1KMnO of the embodiment of the present invention4The sludge zeta potential change figure of-Fe (II) opsonic activity sludge；
Fig. 4 is the specific surface area pair of municipal sewage plant sludge of the present invention, dewatered sludge and Mn-Fe-SBC adsorbent material
Than figure；
Fig. 5 is 2 different ratio KMnO of the embodiment of the present invention4Mn-Fe-SBC adsorbent material decomposing H made from-Fe (II)2O2
The comparison diagram of ability；
Fig. 6 is the organic matter variation diagram (TOC) of Mn-Fe-SBC adsorbent material of embodiment of the present invention processing arsenic-containing waste water；
The Mn-Fe- of difference dosage when Fig. 7 is 2Mn-Fe-SBC adsorbent material of embodiment of the present invention processing municipal wastewater
Adsorption efficiency of the SBC adsorbent material to the organic matter of municipal wastewater；
Mn-Fe- at a temperature of varying environment when Fig. 8 is 2Mn-Fe-SBC adsorbent material of embodiment of the present invention processing municipal wastewater
The efficiency of SBC adsorbent material absorption municipal wastewater organic matter.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is further described.
Embodiment 1:
Municipal sewage plant sludge is added in reactor and is stirred, being kept stirring speed is 3000r/min,
The KMnO of different content is added under lasting stirring respectively4-Fe(II)(KMnO4With FeSO-4.5H2O add than set gradually for
0, sludge conditioning 3/1,2/1,1,2/3,1/2,1/3) is carried out, is then placed within the six stirring instrument room temperature equipped with 200rpm/min
Stirring 180min makes it sufficiently after the reaction was completed, is reacted using CST (capillary water absorbing time), sludge specific resistance and zeta potential measurement
The dewatering and sludge of front and back sludge electrically change.CST result of variations is shown in Fig. 1, as shown in Figure 1, when the mass concentration of Fe/Mn
(mg/L) when adding than for 3:1, sludge CST is minimum；Fig. 2 is shown in sludge specific resistance variation, as shown in Figure 2, works as FeSO4.5H2Mole of O
When dosage is 40 and 60 μm of ol/L, sludge specific resistance is minimized；Zeta potential change is shown in Fig. 3, from the figure 3, it may be seen that when Mn/Fe's
When mass concentration dosing ratio is 1:2, the zeta current potential of sludge rises to highest.It is described above to pass through KMnO4The dirt of-Fe (II) conditioning
Mud, due to KMnO4- Fe (II) system increases the dewatering of sludge the charge neutrality of sludge and oxidation catalysis process
Add.
Embodiment 2:
Municipal sewage plant sludge is added in reactor and is stirred, being kept stirring speed is 3000r/min,
The KMnO of different content is added under lasting stirring respectively4-Fe(II)(KMnO4With FeSO-4.5H2The mass concentration of O add than according to
It is secondary be set as 3/1,2/1,1,2/3,1/2,1/3) carry out sludge conditioning, be then placed within six stirrings equipped with 200rpm/min
Instrument stirring at normal temperature 180min makes it make the mud-water separation of sludge by centrifugally operated, after being dehydrated sufficiently after the reaction was completed
Sludge；Dewatered sludge is put into drying unit, and the heating, drying at 105 DEG C, obtains dewatered sludge；By desiccation dirt
Mud carries out high-temperature calcination under nitrogen atmosphere protection, is warming up to 600~800 DEG C with the heating rate of 5 DEG C/min when high-temperature calcination,
2h is kept the temperature, Mn-Fe bimetallic function carbon material crude product is obtained；It is thick that Mn-Fe bimetallic function carbon material is washed with deionized
Product is to wash away extra unreacted KMnO4- Fe (II), filter 23~5 time are dried in vacuo 12h under the conditions of 60 DEG C, and will do
Product after dry is ground to powdered, obtains powdered bimetallic function carbon material Mn-Fe-SBC adsorbent material.
Measure specific surface area, the decomposing H of obtained Mn-Fe-SBC adsorbent material2O2Decomposition efficiency to illustrate Mn-Fe-
The performance of SBC adsorbent material.For the specific surface area of Mn-Fe-SBC adsorbent material as shown in figure 4, in Fig. 4, WAS indicates municipal wastewater
Treatment plant's sludge, Fe/Mn-WAS indicate that dewatered sludge, Fe/Mn-SBC indicate Mn-Fe-SBC adsorbent material obtained, can by Fig. 4
Know and utilizes KMnO4- Fe (II) is catalyzed the specific surface area of the Mn-Fe-SBC adsorbent material of sludge preparation by the 14.8829m of former mud2/g
Increase to 100.0812m2/g.Decomposing H is carried out using Mn-Fe-SBC adsorbent material2O2Decomposition efficiency as shown in figure 5, working as Mn/
The catalytic performance of the mass concentration dosing ratio of Fe Mn-Fe-SBC adsorbent material prepared when being 1:2 is best, reachable
119.8mmol/L.Above description utilizes KMnO4- Fe (II) improves the Mn-Fe-SBC adsorbent material of sludge preparation, can improve dirt
Mud dewatering, while the absorption energy-absorbing and catalytic performance of sludge carbon can be enhanced.
Laboratory simulation configures arsenic-containing waste water, carries out going for organic matter using the Mn-Fe-SBC adsorbent material of above-mentioned preparation
Except experiment.The humic acid of 5mg/L is added in laboratory simulation arsenic-containing waste water, the Mn-Fe-SBC adsorbent material for adding 1g/L carries out
Adsorption treatment arsenic-containing waste water characterizes Mn-Fe-SBC constituent content, as shown in table 1, Mn-Fe- by XPS after reacting 180min
After SBC adsorbent material carries out processing arsenic-containing waste water, the percentage composition of arsenic element increases to 1.40% by 0.83%, thus proves arsenic
Effectively it is adsorbed to the surface of Mn-Fe-SBC adsorbent material.
Constituent content of the table 1:Mn-Fe-SBC adsorbent material before and after handling arsenic-containing waste water
The variation of humic acid after arsenic-containing waste water processing is measured by three-dimensional fluorescence detector, as shown in Figure 6, it can be seen that warp
After the processing of Mn-Fe-SBC adsorbent material, the total content of organic carbon (TOC) of humic acid is substantially reduced, and in H2O2Existing condition
Under, the removal efficiency of humic acid more preferably, from 10mg/L is reduced to 6.3mg/L, urges to prove that Mn-Fe-SBC adsorbent material has
Change ability, and while Mn-Fe-SBC adsorbent material processing target arsenic substance, the organic matters such as humic acid are also adsorbed removal.
Therefore, Mn-Fe-SBC adsorbent material can be applied to the application processing in practical arsenic-containing waste water.
A certain amount of municipal wastewater is taken from certain sewage treatment plant, the pH=4.0 of the municipal wastewater utilizes above-mentioned preparation
Mn-Fe-SBC adsorbent material carries out the removal experiment of organic matter.Add a certain amount of Mn-Fe-SBC adsorbent material adsorption treatment municipal administration
Content of organics in sewage tests characterization by COD and determines different dosage (0.5g/L, 1.0g/ after reacting 120 minutes
L, 1.5g/L, 2.0g/L, 2.5g/L, 3.0g/L, 3.5g/L, 4.0g/L) Mn-Fe-SBC adsorbent material and differential responses environment
Temperature organic matter adsorption efficiency is influenced, as shown in fig. 7, when Mn-Fe-SBC adsorbent material dosage reaches 3g/L, municipal administration
The removal efficiency of organic matter of sewage reaches highest (80%), and it is optimum dosage that 3g/L, which thus may be selected,.Meanwhile as shown in Figure 8,
The temperature of reaction condition has not significant impact the efficiency of organic matter in Mn-Fe-SBC adsorbent material Adsorption municipal wastewater,
And removal efficiency reaches 80%.Therefore, Mn-Fe-SBC adsorbent material can be applied among practical municipal wastewater processing.
The present invention passes through KMnO using municipal sewage plant sludge as raw material, using bimetallic catalytic method first4-Fe(II)
Sludge is improved, improves the dewatering and structure feature of sludge, then pass through a series of physical processes such as centrifugation, desiccation and carbonization
A large amount of useless organic matters in sludge are removed, so that synthesis is capable of handling the Mn-Fe-SBC adsorbent material of arsenic-containing waste water.
The present invention is by adjusting KMnO4Concentration, dosing ratio, the calcination temperature in carbonization and the carbonization time of-Fe (II), can
To realize the regulation to bimetallic function sludge carbon based material Mn-Fe-SBC adsorbent material hole matter structure, and then influence its absorption
Performance.
In the absence of conflict, the feature in embodiment and embodiment herein-above set forth can be combined with each other.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (7)
1. one kind is based on KMnO4The method that dewatering coupling catalytic pyrolysis prepares charcoal base function water-purifying material is strengthened in-Fe (II) conditioning,
Characterized by comprising the following steps:
S1 adds KMnO into sludge while stirring4- Fe (II) forms mud mixed liquid；
S2, the mud mixed liquid of whipping step S1, is then centrifuged for, obtains dewatered sludge under room temperature；
Dewatered sludge is dried, obtains dewatered sludge by S3；
The dewatered sludge of step S2 is carried out carbonization treatment under nitrogen atmosphere protection, obtains Mn-Fe bimetallic function carbon materials by S4
Expect crude product；
S5, using the Mn-Fe bimetallic function carbon material crude product of deionized water washing step S4, filtering, drying are milled to powder
Last shape to get arrive Mn-Fe-SBC adsorbent material.
2. according to claim 1 be based on KMnO4- Fe (II) conditioning strengthens dewatering coupling catalytic pyrolysis and prepares charcoal base function
The method of water-purifying material, which is characterized in that in step S1, KMnO4- Fe (II) is KMnO4And FeSO4·5H2The mixture of O,
KMnO4With FeSO4·5H2The mass concentration dosing ratio of O is 3:1~1:3.
3. according to claim 1 be based on KMnO4- Fe (II) conditioning strengthens dewatering coupling catalytic pyrolysis and prepares charcoal base function
The method of water-purifying material, which is characterized in that sludge used in step S1 be common sludge, digested sludge or by common sludge and
The mixing sludge of digested sludge composition.
4. according to claim 1 be based on KMnO4- Fe (II) conditioning strengthens dewatering coupling catalytic pyrolysis and prepares charcoal base function
The method of water-purifying material, which is characterized in that in step S3, the temperature of drying process is 105 DEG C.
5. according to claim 1 be based on KMnO4- Fe (II) conditioning strengthens dewatering coupling catalytic pyrolysis and prepares charcoal base function
The method of water-purifying material, which is characterized in that in step S4, the temperature of carbonization treatment is 600~800 DEG C.
6. one kind is based on KMnO4The charcoal base function water-purifying material of dewatering coupling catalytic pyrolysis preparation is strengthened in-Fe (II) conditioning, special
Sign is, is made by the described in any item preparation methods of claim 1-5.
7. using described in claim 1 based on KMnO4- Fe (II) conditioning strengthens dewatering coupling catalytic pyrolysis and prepares charcoal base function
The application for the Mn-Fe-SBC adsorbent material that the method for water-purifying material is prepared, which is characterized in that the Mn-Fe-SBC absorption
Material can be applied to arsenic-containing waste water and micro- Organic Pollutants wastewater treatment.
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| CN201910412837.XA CN110252241A (en) | 2019-05-17 | 2019-05-17 | Based on KMnO4The method that dewatering coupling catalytic pyrolysis prepares charcoal base function water-purifying material is strengthened in-Fe (II) conditioning |
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| CN201910412837.XA CN110252241A (en) | 2019-05-17 | 2019-05-17 | Based on KMnO4The method that dewatering coupling catalytic pyrolysis prepares charcoal base function water-purifying material is strengthened in-Fe (II) conditioning |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110606539A (en) * | 2019-10-16 | 2019-12-24 | 河南省科学院化学研究所有限公司 | Method for treating organic wastewater by utilizing sludge resource |
| CN111302482A (en) * | 2020-03-03 | 2020-06-19 | 北京林业大学 | Biological retention material for synchronously removing nitrogen, phosphorus and pesticides in rainwater runoff and application method |
| CN111437825A (en) * | 2020-05-28 | 2020-07-24 | 广东工业大学 | Iron-manganese biochar catalyst and application thereof in conditioning sludge dehydration |
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| CN102674644A (en) * | 2011-11-28 | 2012-09-19 | 北京朗新明环保科技有限公司 | Sludge conditioning and dewatering treatment system and method |
| CN108033657A (en) * | 2017-12-18 | 2018-05-15 | 北京城市排水集团有限责任公司 | A kind of method for improving pyrolyzing sludge carbonization absorption property |
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| CN102674644A (en) * | 2011-11-28 | 2012-09-19 | 北京朗新明环保科技有限公司 | Sludge conditioning and dewatering treatment system and method |
| CN108033657A (en) * | 2017-12-18 | 2018-05-15 | 北京城市排水集团有限责任公司 | A kind of method for improving pyrolyzing sludge carbonization absorption property |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110606539A (en) * | 2019-10-16 | 2019-12-24 | 河南省科学院化学研究所有限公司 | Method for treating organic wastewater by utilizing sludge resource |
| CN110606539B (en) * | 2019-10-16 | 2021-10-15 | 河南省科学院化学研究所有限公司 | Method for treating organic wastewater by utilizing sludge resource |
| CN111302482A (en) * | 2020-03-03 | 2020-06-19 | 北京林业大学 | Biological retention material for synchronously removing nitrogen, phosphorus and pesticides in rainwater runoff and application method |
| CN111437825A (en) * | 2020-05-28 | 2020-07-24 | 广东工业大学 | Iron-manganese biochar catalyst and application thereof in conditioning sludge dehydration |
| CN111437825B (en) * | 2020-05-28 | 2023-06-20 | 广东工业大学 | Iron-manganese biochar catalyst and application thereof in conditioning sludge dewatering |
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Application publication date: 20190920 |