CN105948211A - Method for coagulating in-situ formed iron - Google Patents
Method for coagulating in-situ formed iron Download PDFInfo
- Publication number
- CN105948211A CN105948211A CN201610552065.6A CN201610552065A CN105948211A CN 105948211 A CN105948211 A CN 105948211A CN 201610552065 A CN201610552065 A CN 201610552065A CN 105948211 A CN105948211 A CN 105948211A
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- CN
- China
- Prior art keywords
- sewage
- external force
- certain time
- ferrum
- keep
- 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
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- Chemical & Material Sciences (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)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a method for coagulating in-situ formed iron. The method comprises the steps: adding ferrite into sewage and mixing, and then adding an oxidant. Therefore, the iron (III) is in contact with the sewage as soon as the iron is formed and the reaction activity of the in-situ formed iron is sufficiently expressed.
Description
Technical field
The present invention relates to sewage treatment area, particularly relate to the side of a kind of sewage coagulating treatment
Method.
Background technology
Nascent state ferrum refers to use oxidizing ferrous iron, has just been oxidized to three at ferrous iron
State during valency ferrum.Owing to ferric iron is newly-generated, it is evenly distributed, and granule is tiny, instead
Should be active high, therefore, coagulation effect, to get well compared to conventional ferrum class coagulant, this point is
Confirmed by the scholar of Harbin Institute of Technology and Tongji University, but their method used is all
Ferrous salt and oxidant are first mixed, prepares nascent state ferrum coagulant, then make it anti-with sewage
Should.Do so, ferrum (III) although harsh one-tenth soon, but this is not " raw in chemical sense
Become moment ".
This seminar, when processing papermaking wastewater, uses and ferrous salt is first dissolved in sewage,
Oxidizer again.So, when ferrum (II) is oxidized to ferrum (III) by oxidant, the most just
With waste water, it is achieved " generating moment " truly, therefore, can more preferably play new life
The reactivity of state ferrum.
Summary of the invention
The technical problem to be solved is to provide a kind of method of nascent state ferrum coagulation,
It is characterized in that, comprise the following steps:
Step one: make sewage enter turbulent condition and keep by external force；
Step 2: soluble ferrite is added in the sewage of turbulent flow, keep certain time；
Step 3: reduce external force, reduces the turbulence level of sewage, adds oxidation in sewage
Agent also keeps its turbulent condition certain time；
Step 4: continue to reduce external force, continues to reduce the turbulence level of sewage, and keeps one
Fix time；
Step 5: remove external force, makes sewage enter precipitated form；
Step 6: separate supernatant and flco；
As preferably, described soluble ferrite is ferrous sulfate, and described oxidant is peroxide
Change hydrogen.
Compared with prior art, the method for a kind of nascent state ferrum coagulation that the present invention provides
Provide the benefit that:
More giving full play to the reactivity of nascent state ferrum, coagulation effect is good.
Detailed description of the invention
Embodiment one:
The present embodiment comprises the following steps:
Step one: take the secondary clarifier effluent of intermediate water of papermaking processing system in container, uses
Agitator makes sewage enter turbulent condition and keep；
Step 2: ferrous sulfate is added in the sewage of turbulent flow, keep certain time；
Step 3: reduce the rotating speed of agitator, adds hydrogen peroxide in sewage and keeps being somebody's turn to do
Rotating speed certain time；
Step 4: continue to reduce the rotating speed of agitator, and keep certain time；
Step 5: stop stirring, makes sewage enter precipitated form；
Step 6: separate supernatant and flco；
In the present embodiment, the clearance of COD reaches 68.5%.
Above example is only the exemplary embodiment of the present invention, is not used in the restriction present invention,
Protection scope of the present invention is defined by the claims.Those skilled in the art can be in the present invention
Essence and protection domain in, the present invention is made various amendment or equivalent, this amendment
Or equivalent also should be regarded as being within the scope of the present invention.
Claims (2)
1. the method for a nascent state ferrum coagulation, it is characterised in that comprise the following steps:
Step one: make sewage enter turbulent condition and keep by external force；
Step 2: soluble ferrite is added in the sewage of turbulent flow, keep certain time；
Step 3: reduce external force, reduces the turbulence level of sewage, adds oxidant and keep its state certain time in sewage；
Step 4: continue to reduce external force, continues to reduce the turbulence level of sewage, and keeps certain time；
Step 5: remove external force, makes sewage enter precipitated form；
Step 6: separate supernatant and flco.
The method of a kind of nascent state ferrum coagulation the most according to claim 1, described soluble ferrite is ferrous sulfate, and described oxidant is hydrogen peroxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610552065.6A CN105948211A (en) | 2016-07-14 | 2016-07-14 | Method for coagulating in-situ formed iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610552065.6A CN105948211A (en) | 2016-07-14 | 2016-07-14 | Method for coagulating in-situ formed iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105948211A true CN105948211A (en) | 2016-09-21 |
Family
ID=56900206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610552065.6A Pending CN105948211A (en) | 2016-07-14 | 2016-07-14 | Method for coagulating in-situ formed iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105948211A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102464415A (en) * | 2010-10-29 | 2012-05-23 | 新奥科技发展有限公司 | Advanced treatment process for coal gasification wastewater |
| CN102583671A (en) * | 2012-01-13 | 2012-07-18 | 同济大学 | Preparation method of novel ecological ferrous coagulant, product prepared by method, and application of product |
-
2016
- 2016-07-14 CN CN201610552065.6A patent/CN105948211A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102464415A (en) * | 2010-10-29 | 2012-05-23 | 新奥科技发展有限公司 | Advanced treatment process for coal gasification wastewater |
| CN102583671A (en) * | 2012-01-13 | 2012-07-18 | 同济大学 | Preparation method of novel ecological ferrous coagulant, product prepared by method, and application of product |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160921 |
|
| RJ01 | Rejection of invention patent application after publication |