CN105399196A - A sewage Fenton treating agent - Google Patents

A sewage Fenton treating agent Download PDF

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Publication number
CN105399196A
CN105399196A CN201510913894.8A CN201510913894A CN105399196A CN 105399196 A CN105399196 A CN 105399196A CN 201510913894 A CN201510913894 A CN 201510913894A CN 105399196 A CN105399196 A CN 105399196A
Authority
CN
China
Prior art keywords
sewage
wastewater
agent
value
fenton
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.)
Pending
Application number
CN201510913894.8A
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Chinese (zh)
Inventor
马海青
陈连生
张卫东
郑文华
王栓龙
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Cangzhou Honghai Chemical Co Ltd
Original Assignee
Cangzhou Honghai Chemical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Cangzhou Honghai Chemical Co Ltd filed Critical Cangzhou Honghai Chemical Co Ltd
Priority to CN201510913894.8A priority Critical patent/CN105399196A/en
Publication of CN105399196A publication Critical patent/CN105399196A/en
Pending legal-status Critical Current

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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
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/722—Oxidation by peroxides
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • 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
    • 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
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56—Macromolecular compounds
    • 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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/02—Specific form of oxidant
    • C02F2305/026—Fenton's reagent

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)

Abstract

A sewage Fenton treating agent is disclosed. A preparing method of the agent includes 1) adjusting the pH value of wastewater to be measured to 3-6, 2) adding FeSO4.7H2O into the wastewater, and mixing by stirring for 3-10 min, 3) adding H2O2, and fully mixing by stirring, 4) after 15 min, adding the FeSO4.7H2O again, and stirring for 3-10 min, and 5) adjusting the pH value to 7.5-8.0 and adding a flocculant. The FeSO4.7H2O is added in batches, thus increasing capability of catalyzing organic compounds, increasing the treatment efficiency and reducing the treatment cost. The agent is wide in application range, high in application capability and suitable for various kinds of wastewater difficult to treat, largely reduces COD, chromaticity, turbidity, and the like of the wastewater, can treat wastewater of the coking industry, the printing and dyeing industry, the pharmaceutical industry, and the like, is beneficial to other subsequent treatment steps, and allows the wastewater to meet local industrial emission standards. The agent is simple in process, high in efficiency and low in cost, so that the agent has a wide market prospect.

Description

Sewage Fenton treatment agent
Technical field
The present invention relates to a kind of sewage water treatment method, particularly relate to a kind of medicament dosage few, wide to acidity subject range, a kind of sewage Fenton(Fenton good to COD removal effect) treatment agent.
Background technology
Fenton method, when processing organic wastewater with difficult degradation thereby, has the advantage that general chemical oxidization method is incomparable, traditional Fenton process, is directly by Fenton reaction reagent (ferrous salt and strong oxidizer such as H 2o 2or HCL0) join in sewage, but in the current use for Fenton medicament, there is dosage large, H 2o 2rate of utilization not high, the sludge quantity that waste water produces in treating processes is large, and the H of remnants 2o 2more, cause certain medicament waste.Therefore, develop reagent dosage few, service efficiency is high, and sludge output is few, H 2o 2the treatment process that residual volume is low has very important significance.。
Summary of the invention
The object of the present invention is to provide a kind of reagent dosage few, oxidation capacity is strong, and service efficiency is high, excellent wastewater treatment effect, the sewage sewage Fenton treatment agent that cost is low.
For solving the problems of the technologies described above, the invention provides a kind of sewage Fenton medicament, it is characterized in that, its preparation method comprises the following steps:
Step 1, the pH value of waste water to be measured is adjusted to 3-6;
Step 2, in waste water, add FeSO 47H 2o, mix and blend 3-10min;
Step 3, add H 2o 2stirring and evenly mixing;
After step 4, interval 15min, again add FeSO 47H 2o, stirs 3-10min;
Step 5, pH value is adjusted to 7.5-8.0, adds flocculation agent.
The present invention improves to be had, FeSO 47H 2o and H 2o 2mass ratio be 2.5-4.5:1.
The present invention improves to be had, and regulates pH value to adopt and adds the adjustment of sulfuric acid, hydrochloric acid, sodium hydroxide or lime.
The present invention improves to be had, and adds coagulant aids again in step 5 after adding flocculation agent.
The present invention improves to be had, and described flocculation agent is bodied ferric sulfate and negatively charged ion PAM.
Beneficial effect of the present invention is: in the present invention, the dosage of Fenton reagent can add according to the COD practical situation of waste water, for this reducing the waste of medicament.FeSO47H2O adds by the present invention in batches, thus strengthens the ability of catalyzing organic, improves processing efficiency, reduces processing costs.The present invention is applied widely, and application power is strong, is applicable to various unmanageable waste water, greatly reduce the COD of waste water, colourity, turbidity etc., the industry waste water such as coking, printing and dyeing, pharmacy can be processed, be conducive to other process in later stage, make it to reach local discharge standard.This technique is simple simultaneously, and efficiency is high, and cost is low, and therefore technique also has comparatively wide market outlook.
Embodiment
By describing technology contents of the present invention, structural attitude in detail, being realized object and effect, be explained in detail below in conjunction with embodiment.
The invention provides a kind of sewage Fenton treatment agent, its preparation method specifically comprises the following steps:
Step 1, the pH value of waste water to be measured is adjusted to 3-6, wherein, adopt acidic solution or basic solution to regulate the pH value of waste water, concrete, acidic solution is sulfuric acid or hydrochloric acid, and basic solution is sodium hydroxide or lime;
Step 2, in waste water, add FeSO 47H 2o, mix and blend 3-10min, wherein, FeSO 47H 2o and H 2o 2ratio be 2.5-4.5:1, be chemically measure in water sample the amount needing oxidized reducing substances for COD(chemical oxygen demand (COD) ChemicalOxygenDemand.) higher waste water suitably can improve FeSO 47H 2o and H 2o 2add ratio.
Step 3, add H 2o 2stirring and evenly mixing;
After step 4, interval 15min, again add FeSO 47H 2o, stirs 3-10min;
Step 5, pH value is adjusted to 7.5-8.0, adds flocculation agent, in order to accelerate the flocculation sediment time, coagulant aids can be added after adding flocculation agent, accelerate flco and increase, shorten sedimentation time.
Through above-mentioned sewage disposal, just effectively processing various unmanageable waste water, greatly reduce the COD of waste water, colourity, turbidity etc., specifically please can measure by liquid by getting upper strata.
The present invention is that a kind of one to Fenton process is improved, namely at H 2o 2at FeSO 47H 2decompose under the katalysis of O and generate hydroxyl free radical (OH), this free radical has very large activity, can decompose the most organism of oxidation, therefore be applied in field of wastewater, can process the waste water of the high COD that a lot of general production technique cannot process.The turbidity, COD etc. of waste water can also be reduced simultaneously, be convenient to some follow-up process, be applicable to the industrial and life contaminated water process such as printing and dyeing, coking, pharmacy.
Below by specific embodiment, technical scheme of the present invention is described:
Make with medicament: 1.FeSO 47H 2o is configured to content liquid 40%
2.H 2o 2content be 30%
3. sodium hydrate content is 96%
4. flocculation agent (bodied ferric sulfate+negatively charged ion PAM)
Bodied ferric sulfate is 10.5%
Embodiment 1:
Getting COD is 230mg/L, and pH value is the coking chemical waste water of 4.5.
The pH value of step 1, waste water meets at 3-6, directly adds FeSO 47H 2o700mg/L, stirs 10min;
Step 2, add H 2o 2400mg/L, stirs, and leaves standstill 15min;
Step 3, again add FeSO 47H 2o300mg/L, stirs 10min;
Step 4, with sodium hydroxide regulate pH value to 8.0, there is ferric flocs unit, add bodied ferric sulfate 300mg/L, PAM1mg/L.Stir, leave standstill 40min, get supernatant liquid and measure.
detected result:getting supernatant liquid COD measurement result is 90.92mg/L, and clearance is 60.47%.
In order to compare, contriver selects same sewage to carry out traditional treatment process, concrete:
Getting COD is 230mg/L, and pH value is the coking chemical waste water of 4.5.
Step 1, add H 2o 2400mg/L, stirs, and leaves standstill 15min;
Step 2, add FeSO 47H 2o1000mg/L, stirs 10min;
Step 3, with sodium hydroxide regulate pH value to 8.0, there is ferric flocs unit, add bodied ferric sulfate 300mg/L, PAM1mg/L.Stir, leave standstill 40min, get supernatant liquid and measure.(throw out floats, and has the H that unreacted is complete 2o 2exist)
detected result:getting supernatant liquid COD measurement result is 145.88mg/L, and clearance is 36.57%.
By this research, Fenton reagent is added in batches, the COD, colourity, turbidity etc. of waste water are reduced greatly.The effect of Fenton reagent has been performed to maximization, and cost has been reduced to and has minimized, and service efficiency is improved greatly.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification sheets of the present invention to do equivalent structure or the conversion of equivalent flow process, or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.

Claims (5)

1. a sewage Fenton treatment process, is characterized in that, comprises the following steps:
Step 1, the pH value of waste water to be measured is adjusted to 3-6;
Step 2, in waste water, add FeSO 47H 2o, mix and blend 3-10min;
Step 3, add H 2o 2stirring and evenly mixing;
After step 4, interval 15min, again add FeSO 47H 2o, stirs 3-10min;
Step 5, pH value is adjusted to 7.5-8.0, adds flocculation agent.
2. sewage Fenton treatment process according to claim 1, is characterized in that, FeSO 47H 2o and H 2o 2mass ratio be 2.5-4.5:1.
3. sewage Fenton treatment process according to claim 1, is characterized in that, regulates pH value to adopt and adds the adjustment of sulfuric acid, hydrochloric acid, sodium hydroxide or lime.
4. sewage Fenton treatment process according to claim 1, is characterized in that, add coagulant aids again in step 5 after adding flocculation agent.
5. sewage Fenton treatment process according to claim 1, is characterized in that, described flocculation agent is bodied ferric sulfate and negatively charged ion PAM.
CN201510913894.8A 2015-12-12 2015-12-12 A sewage Fenton treating agent Pending CN105399196A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510913894.8A CN105399196A (en) 2015-12-12 2015-12-12 A sewage Fenton treating agent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510913894.8A CN105399196A (en) 2015-12-12 2015-12-12 A sewage Fenton treating agent

Publications (1)

Publication Number Publication Date
CN105399196A true CN105399196A (en) 2016-03-16

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112028320A (en) * 2020-09-02 2020-12-04 北京城市排水集团有限责任公司 System for treating sludge anaerobic digestion liquid through acidless Fenton oxidation and treatment method of sludge anaerobic digestion liquid

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101525190A (en) * 2009-02-26 2009-09-09 江苏艾特克环境工程设计研究院有限公司 Efficient wastewater treating process based on Fenton reaction

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101525190A (en) * 2009-02-26 2009-09-09 江苏艾特克环境工程设计研究院有限公司 Efficient wastewater treating process based on Fenton reaction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112028320A (en) * 2020-09-02 2020-12-04 北京城市排水集团有限责任公司 System for treating sludge anaerobic digestion liquid through acidless Fenton oxidation and treatment method of sludge anaerobic digestion liquid
CN112028320B (en) * 2020-09-02 2024-02-02 北京城市排水集团有限责任公司 System for treating sludge anaerobic digestion solution by non-acidification Fenton oxidation and treatment method of sludge anaerobic digestion solution

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Application publication date: 20160316