AU2020101586A4 - A PFMSSB composite flocculent - Google Patents
A PFMSSB composite flocculent Download PDFInfo
- Publication number
- AU2020101586A4 AU2020101586A4 AU2020101586A AU2020101586A AU2020101586A4 AU 2020101586 A4 AU2020101586 A4 AU 2020101586A4 AU 2020101586 A AU2020101586 A AU 2020101586A AU 2020101586 A AU2020101586 A AU 2020101586A AU 2020101586 A4 AU2020101586 A4 AU 2020101586A4
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- AU
- Australia
- Prior art keywords
- flocculent
- pfmssb
- molar ratio
- value
- composite
- 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.)
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Classifications
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/14—Sulfates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
of Description
A PFMSSB composite flocculent applied for treating the coking wastewater in
environmental protection engineering field is provided, which is characterized by the molar
ratio of Fe/Si=0.8~2.5, Mg/Fe=0.3~1.5 and B/Si=0.2~0.4; the preparation method of the
flocculent is as follows: a certain amount of sodium silicate is weighed and taken, a solution
with the 2%~3% quality percentage of SiO 2 is gotten through adding into distilled water, the
activation pH value is adjusted between 2-3 by use of sulfuric acid and sodium hydroxide and
polymerization is completed in room temperature for 10-30min; the ferric sulfate, magnesium
sulfate and sodium tetraborate are added according to molar ratio and stirred in a mixer and
the flocculent is finally prepared after curing for 24 hours. During flocculent pre-treating, the
dosage of PFMSSB is the minimum of 1-3ml/L and the pH value may not be adjusted. After
treatment, the removal rate of turbidity and COD in effluent are 96.2% and 43.9%
respectively.
Description
Description
A PFMSSB composite flocculent
Technical Field
The invention belongs to the environmental protection engineering field and
particularly relates to a PFMSSB composite flocculent, suitable for
treating the coking wastewater, landfill leachate and wastewater of emulsions containing
micro and nano particles.
Technical Background
At present, in the field of wastewater treatment, conventional inorganic polymer
flocculants, such as PAC and PFS have their own advantages. However, there are some
problems, not only the dosage is large, it is not economical and practical, but also the effect is
not so good. Using these flocculants, the several indicators of wastewater can't meet
requirements of industrial waste treatment of high-concentration complex pollutant,
especially coking wastewater.
In recent years, it has become a hot topic to research and apply various composite
inorganic polymer flocculants, e.g. in the study on the effects of PFSS treating coking
wastewater, 400mg/L PFSS is directly thrown into the water in secondary sedimentation tank,
M180B0.4g/L oxidizing agent is added, the pH value is controlled between 6.5~7.5 in
oxidation, the coking secondary sedimentation tank water undergoes flocculation and
oxidation, the COD was decreased from 1837.6mg/L to 125.3mg/L, pH value is at about 7.3,
which meet the enterprise's requirements; e.g. the preparation of PFSSB and its flocculating
performance, when the pH value of biochemical coking wastewater is about 6.0, the dosage of
PFSSB is 20mg/L, the turbidity and color removal rate can reach above 93% and 60%
respectively.
A contrastive analysis on the treatment effect of flocculant is conducted: PFSS is used to
process coking secondary sedimentation tank water, the dosage can even reach 400mg/L and
Description
the oxidizing agent process technology is considered, the processing technology is not
economical and practical and the technique is complex and difficultly-operated; if we use the
polyferric silicate sulfate containing boron to process coking wastewater, the rate of the
deturbidity and the decolorization rate is good, but the treatment effect to the pollutant which
are required to meet the coking wastewater pollutant discharge standard is not obvious.
The invention aims to improve the stability and treatment effect of flocculant. To solve
the high COD problem of effluent from coking wastewater bio-chemical treatment, a new
flocculant is prepared to enable the flocculation effect of coking wastewater meet the
enterprise's requirements under the condition of small dosage and single operation.
Summary of the Invention
The invention aims to improve the stability and treatment effect of flocculant. To solve
the high effluent COD problem of coking wastewater from bio - chemical treatment, a new
flocculant is prepared to enable the flocculation effect of coking wastewater meet the national
discharge standard under the condition of small dosage and single operation.
A PFMSSB composite flocculent applied for treating the coking wastewater in
environmental protection engineering field is provided, which is characterized by the molar
ratio of Fe/Si=0.8~1.0, Mg/Fe=0.3~1.5 and B/Si=0.2~0.4; the preparation method of the
flocculent is as follows:
A certain amount of sodium silicate is weighed and taken,a solution with the 2%~3%
quality percentage of SiO2 is gotten through adding into distilled water, the activation pH
value is adjusted between 2-3 by use of sulfuric acid and sodium hydroxide and
polymerization is completed in room temperature for 10-30min, the ferric sulfate, magnesium
sulfate and sodium tetraborate are added according to the molar ratio and stirred in a mixer
for 10~30min and let it stand, the PFMSSB flocculation is finally prepared after curing for 24
hours.
Description
PFMSSB flocculation undergoes flocculent treatment during treating
the coking wastewater: the turbidity of the effluent falls from 30.979NTU to 1.188NTU, with
the turbidity removal rate of 96.2%; the mass concentration of COD drops from 128mg/L to
71.8mg/L, with the removal rate of 43.9%; the above specifications have met the Grade-I
specifications in " Integrated Wastewater Discharge Standard " GB8978 - 1996 and
requirements for indirect reuse in emission standard of pollutants for Coking Chemical
Industry (GB16171-2012), while, the dosage of PFMSSB flocculation is only 1.5ml/L.
Advantages or positive effects:
During flocculent pre-treating, the dosage of PFMSSB is the minimum only at 1.5ml/L
and the pH value of the biochemical coking wastewater may not be adjusted. After treatment,
the removal rate of turbidity and COD in effluent are 96.2% and 43.9% respectively. and the
below-80mg/L COD mass concentration have met the requirements for indirect reuse in
emission standard of pollutants for Coking Chemical Industry (GB16171-2012). The
mechanism analysis shows that the composite flocculant PFMSSB has characteristic chemical
effects and a larger molecule branch net structure and the further analysis proves that
PFMSSB not only has the charge neutrality, adsorption and netting functions of conventional
flocculent, but also has the adsorption bridging and sedimentation netting of better-stability
and strong-performance polymer with larger floes and the faster settling speed.
Detailed Description of the Presently Preferred Embodiments:
The molar ratio of the PFMSSB is Fe/Si=0.8~1.0, Mg/Fe=0.3~0.5 and B/Si=0.2~0.4;
and the preparation method of the flocculent is as follows:
A certain amount of sodium silicate is weighed and taken,a solution with the 2%~3%
quality percentage of SiO2 is gotten through adding into distilled water, the activation pH
value is adjusted at 2.4 by use of sulfuric acid and sodium hydroxide and polymerization is
completed in room temperature for 30min, the ferric sulfate, magnesium sulfate and sodium
Description
tetraborate are added according to the molar ratio and stirred in a mixer for 30min and let it
stand, the flocculent is finally prepared after aging for 1 day.
Claims (1)
1. A PFMSSB composite flocculent is provided, which is characterized in the
preparation method, as follows:
A certain amount of sodium silicate is weighed and taken, a solution with the 2%-3%
quality percentage of SiO2 is gotten through adding into distilled water, the activation pH
value is adjusted between 2-3 by use of sulfuric acid and sodium hydroxide and
polymerization is completed in room temperature for 10 ~ 30min. The ferric sulfate,
magnesium sulfate and sodium tetraborate are added according to molar ratio and stirred in a
mixer and the flocculent is finally prepared after aging for 24 hours; the molar ratio of the
PFMSSB composite flocculent is Fe/Si=0.8-2.5, Mg/Fe=0.3~1.5 and B/Si=0.2~0.4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2020101586A AU2020101586A4 (en) | 2020-07-31 | 2020-07-31 | A PFMSSB composite flocculent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2020101586A AU2020101586A4 (en) | 2020-07-31 | 2020-07-31 | A PFMSSB composite flocculent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2020101586A4 true AU2020101586A4 (en) | 2020-09-10 |
Family
ID=72333661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2020101586A Ceased AU2020101586A4 (en) | 2020-07-31 | 2020-07-31 | A PFMSSB composite flocculent |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2020101586A4 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112537831A (en) * | 2020-11-25 | 2021-03-23 | 山东省分析测试中心 | Coagulant for removing phosphate in pig breeding wastewater and preparation and application thereof |
| CN114956282A (en) * | 2022-05-09 | 2022-08-30 | 同济大学 | Composite coagulation-flocculant and preparation method and application thereof |
-
2020
- 2020-07-31 AU AU2020101586A patent/AU2020101586A4/en not_active Ceased
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112537831A (en) * | 2020-11-25 | 2021-03-23 | 山东省分析测试中心 | Coagulant for removing phosphate in pig breeding wastewater and preparation and application thereof |
| CN114956282A (en) * | 2022-05-09 | 2022-08-30 | 同济大学 | Composite coagulation-flocculant and preparation method and application thereof |
| CN114956282B (en) * | 2022-05-09 | 2023-09-26 | 同济大学 | Composite coagulation-flocculant and preparation method and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGI | Letters patent sealed or granted (innovation patent) | ||
| MK22 | Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry |