CN102432135A - Pre-treatment method for high-concentration organic waste water - Google Patents
Pre-treatment method for high-concentration organic waste water Download PDFInfo
- Publication number
- CN102432135A CN102432135A CN201010296447XA CN201010296447A CN102432135A CN 102432135 A CN102432135 A CN 102432135A CN 201010296447X A CN201010296447X A CN 201010296447XA CN 201010296447 A CN201010296447 A CN 201010296447A CN 102432135 A CN102432135 A CN 102432135A
- Authority
- CN
- China
- Prior art keywords
- waste water
- water
- organic wastewater
- concentrated organic
- cod
- 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
Links
Images
Landscapes
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention provides a pre-treatment method for high-concentration organic waste water, which relates to the field of industrial waste water integral treatment and aims at the problems of biochemical treatment difficulty, degradation difficulty and high organic matter concentration of high-concentration organic waste water generated during the high-sulfur high-thickness oil refining. Therefore, the applicable pre-treatment method is selected, and the biochemical performance of the waste water is improved. The process has the advantages that the work procedure of the original H2O2 high-grade oxidation Fe<2+> addition is saved, i.e. the reagent cost is saved, the chemical oxygen demand (COD) of the treated outlet water is lower than 800mg/L, the biochemical treatment performance of the waste water is obviously improved, and the B/C is higher than 0.3. Good water quality is provided for the subsequent biochemical treatment. The method is used for the field of high-concentration organic waste water produced during the high-sulfur high-thickness oil refining.
Description
Technical field
The present invention relates to a kind of wastewater treatment method, more particularly, relate to a kind of pretreatment process of organic wastewater with high concentration, be applicable to the pretreatment process of the electric desalting waste water that refining high-sulfur high-consistency crude oil formed asphalt is produced.
Background technology
Along with expanding economy, the minimizing of water resources, the status of water in industrial production also becomes more and more important; Petrochemical complex industry is a high energy consumption, the industry of high pollution, and will discharge a large amount of industrial sewages every year; Wherein contain many toxic organic pollutants; Especially along with the poor qualityization of refining crude oil, the refining of high-sulfur high viscous oil makes the waste water that the pitch production equipment produces; Especially organic content increases in the electric desalting waste water, through analyzing the organism that is mainly alkanes, benzene class and other heteroaromatic hydro carbons etc.Therefore the water quality characteristics of this waste water is organic concentration height, difficult degradation, difficult biochemical high concentrated organic wastewater.Intractability is very big, and water outlet COD can not be up to standard.
The treatment technology of high concentrated organic wastewater mainly contains electrolytic process, advanced oxidation, wet oxidation, biochemical method etc., adopts electrolytic process, advanced oxidation, wet oxidation method, and treatment process is complicated, or system pressure and temperature height, and processing cost is high; And biochemical method treatment of high concentration organic waste water, because entering organic matter of water concentration is high, and biodegradability is poor, therefore adopts biochemical method to handle separately, water outlet COD can not be up to standard.
To the processing of this high concentrated organic wastewater, also do not have very cost-effective treatment process at present, but be directed against the water quality characteristics of this kind wastewater biodegradability difference, can adopt corresponding pretreatment process, improve the biodegradability of waste water.Thereby adopt the combination process of pre-treatment+biochemistry to guarantee standard wastewater discharge.Document 1 (Ma Jinghuan, Li Qiang. electric flocculence is handled the research that contains polymer sewage from oil extraction, Tianjin; University Of Science and Technology Of Tianjin's journal, 2009,24 (4), 56～59) in, adopted electrolytic process to handle and contained polymer sewage from oil extraction, but a COD to its waste water there is 50% clearance, and the biodegradability of waste water is not improved.
Therefore choosing suitable pretreatment process is the key of handling this kind waste water.Waste water after biodegradability improves, has promptly guaranteed the treatment effect of follow-up biochemical system through pre-treatment.Poor qualityization along with domestic Petrochemical Enterprises refining crude oil.This type of high concentrated organic wastewater that produces is handled up to standard with imperative, and therefore developing rational high concentrated organic wastewater preconditioning technique has very good prospects for application.
Summary of the invention
The technical problem that the present invention will solve:
The high concentrated organic wastewater that is produced to refining high-sulfur high viscous oil contains organism such as alkanes, benzene class, naphthalene class and other heteroaromatic hydro carbons; And organic concentration height, difficult degradation, difficult biochemical; Therefore need choose suitable pretreatment process, improve the biodegradability of this waste water.
The concentration of organic wastewater that the present invention handles is high, and biodegradability is poor, adopts the routine biochemistry method can not qualified discharge; Adopt advanced oxidization method complex procedures and investment cost and working cost high,, the invention provides a kind of method of handling this high concentrated organic wastewater in order to overcome the problems of the prior art; (COD is 1500～2000mg/L can be directed against this high concentrated organic wastewater; B/C＜0.1), removes the COD more than 60%, and improve the biodegradability of this waste water; B/C＞0.3 is for the further biochemical treatment of waste water provides good basis.
Technical scheme of the present invention is:
A kind of pretreatment process of high concentrated organic wastewater; Said high concentrated organic wastewater is produced by refining high-sulfur high viscous oil; The pH of said high concentrated organic wastewater is 8～10, COD is 1500～2000mg/L; BOD is 2～10mg/L, BOD/COD (being called for short B/C)＜0.1, and the pretreatment process of said high concentrated organic wastewater may further comprise the steps successively:
(1), regulates waste water to pH value 6～7 according to coming the pH value of water water quality to add acid.
(2) little electrolytic oxidation: waste water is crossed the electrolytic oxidation pond, and the electrolytic oxidation pond is made up of iron-carbon dioxide process carbon electrode, electrode voltage 8～12V, and polar plate spacing 2.5～4cm adds H in the pond
2O
2500～800mg/L, waste water stopped in reaction tank 4-6 hour.The ferroelectric utmost point of electrolyzer produces Fe after electrolysis
2+, a part of Fe
2+As H
2O
2The catalyzer of oxidation, with the hardly degraded organic substance molecule chain rupture in the waste water, thus the biodegradability of raising waste water; Part Fe
2+With the OH in the water
-Reaction generates Fe (OH)
2As flocculation agent.Organic pollutant in the solution system is adsorbed the back sedimentation remove, waste water stops 4～6h in reaction tank, can reach molecular balance.
(3) waste water through little electrolytic oxidation gets into the settling tank post precipitation, gets into follow-up biochemical system.
Preferred in the specific implementation:
In step (1), said acid is HCl, and the pH that regulates said high concentrated organic wastewater is 6.3～6.5.
In step (2), according to mass ratio H
2O
2: the ratio of COD=0.2～0.4: 1 adds H
2O
2
In step (3), settling tank adopts inclined-plate clarifying basin.Surface load 100m
3/ m
2.d, the residence time is 40 minutes.
In electrolyzer, adopt " iron-carbon " electrode, this is because the flocculating effect of " iron-carbon " electrode obviously is superior to " aluminium-carbon " electrode, Fe (OH)
2The colloidal adsorptive power is better than Al (OH)
3, can the more organic pollutant of adsorption-flocculation.The Fe (OH) that generates
2Flocculation agent mainly shows as embedding and two kinds of effects of surface adsorption to the removal of organic pollutant in the sewage, is main with surface adsorption wherein.The flocculation agent that electrolysis produces is that than the advantage of additional flocculating agents it is in electrolytic process, evenly to produce sedimentation again after can fully adsorbing the organic pollutant in the system.Under the condition of identical flocculation agent; The generation speed and the settling velocity of flocculation agent become the key that influences flocculating effect: flocculation agent produces too fast; Can make system reach sedimentation concentration very soon, state can't make full use of colloid surface with regard to sedimentation not adsorbing completely.In addition, can't in system, fully spread after colloid produces, also be unfavorable for effective removal organic pollutant in the system; Flocculation agent produced slow, though can make full use of the colloid of generation, flocculation rate can increase the treatment time too slowly.In addition, too much surface adsorption is unfavorable for the colloidal coagulation, can have a negative impact to subsequent disposal.
The iron pole plate has been brought into play great effect in addition, on the one hand as H
2O
2Catalyzer, on the one hand with water in OH
-Reaction generates Fe (OH)
2Etc. the active flocs unit of water-fast metal hydroxides, Fe
2+Consumption be Fe by mass ratio
2+: COD=0.012～0.024: 1.
Waste water ph variation through inclined-plate clarifying basin is very little, can not regulate pH and directly get into biochemical system, and the sediment that the settling tank bottom produces can together enter into sludge treating system with other settling tank mud and carry out Unified Treatment.
The present invention is with little electrolysis-H
2O
2The advanced oxidation combination process is used for the pre-treatment of this kind high concentrated organic wastewater, the Fe that the iron pole plate produces
2+, on the one hand with water in OH
-Reaction generates Fe (OH)
2Etc. the active flocs unit of water-fast metal hydroxides, in addition as H
2O
2Advanced oxidation produces the catalyzer of hydroxyl radical free radical (OH), and this technology has been saved original H
2O
2Advanced oxidation adds Fe
2+Operation, promptly practiced thrift medicament expense usefulness.And water outlet COD＜800mg/L, the biodegradability of this waste water is able to obvious raising, B/C＞0.3.For follow-up biochemical treatment provides good water quality.
The invention has the beneficial effects as follows:
Adopt treatment process of the present invention, high concentrated organic wastewater is through little electrolysis-H
2O
2After the advanced oxidation combination process is handled, final outflow water COD＜800mg/L, and improve the biodegradability of this waste water, B/C＞0.3 is for the further biochemical treatment of waste water provides good basis.
Description of drawings
Fig. 1 is the pretreatment process technical process of a kind of high concentrated organic wastewater of the present invention.
Embodiment
Embodiment 1
Certain refinery factory pitch processing unit (plant) electric desalting waste water, each pollutent water-quality guideline is seen table 1 in the waste water.
Table 1
This waste water is done following processing:
(1) at first in waste water, adds hydrochloric acid (mass concentration 31%) simultaneously, regulate wastewater pH to 6.5.
(2) waste water enters into the electrolytic oxidation pond after overregulating pH.This Chi Youtie-carbon dioxide process carbon electrode is formed, electrode voltage 8V, and polar plate spacing 2.5cm adds H in the pond
2O
2500mg/L.Waste water stops 4h in reaction tank.The Fe that after electrolysis, produces by the ferroelectric utmost point of electrolyzer
2+, a part of Fe
2+As H
2O
2The catalyzer of oxidation, with the hardly degraded organic substance molecule chain rupture in the waste water, thus the biodegradability of raising waste water; Part Fe
2+With the OH in the water
-Reaction generates Fe (OH)
2As flocculation agent.Organic pollutant in the solution system is adsorbed the back sedimentation to be removed.
(3) through little electrolysis-H
2O
2The waste water of advanced oxidation gets into inclined-plate clarifying basin deposition, surface load 100m
3/ m
2.D, the residence time is 40min.Waste water can get into follow-up biochemical system.Test-results is seen table 2.
Table 2
Embodiment 2
Certain refinery factory pitch processing unit (plant) electric desalting waste water, each pollutent water-quality guideline is seen table 3 in the waste water.
Table 3
This waste water is done following processing:
(1) at first in waste water, adds hydrochloric acid (mass concentration 31%) simultaneously, regulate wastewater pH to 6.3.
(2) waste water enters into the electrolytic oxidation pond after overregulating pH, and this Chi Youtie-carbon dioxide process carbon electrode is formed, electrode voltage 12V, and polar plate spacing 4cm adds H in the pond
2O
2800mg/L.Waste water stops 6h in reaction tank.Organic pollutant in the solution system is adsorbed the back sedimentation to be removed.
(3) through little electrolysis-H
2O
2The waste water of advanced oxidation gets into inclined-plate clarifying basin deposition, surface load 100m
3/ m
2.D, the residence time is 40min.Waste water can get into follow-up biochemical system.Test-results is seen table 4.
Table 4
Comparative Examples 1:
Certain refinery factory pitch processing unit (plant) electric desalting waste water, each pollutent water-quality guideline is seen table 5 in the waste water.
Table 5
To the little electrolysis treatment of this waste water,, regulate waste water to pH value 6～7 at first according to coming the pH value of water water quality to add acid.Waste water gets into the wastewater electrolytic pond, is made up of electrode voltage 10V, polar plate spacing 3cm, Fe iron-carbon dioxide process carbon electrode
2+With the OH in the water
-Reaction generates Fe (OH)
2As flocculation agent.Organic pollutant in the solution system is adsorbed the back sedimentation remove, waste water stops 4～6h in reaction tank, can reach molecular balance.Treatment effect is seen table 6.
Table 6
| Test item | Former water | The electrolyzer water outlet |
| pH | 9 | 6.3 |
| COD(mg/l) | 1980 | 1265 |
| BOD(mg/l) | 8 | 16 |
| Petroleum-type (mg/l) | 78 | 45 |
| Ammonia nitrogen (mg/l) | 78 | 36 |
| Suspended substance (mg/l) | 489 | 334 |
| B/C | 0.004 | 0.05 |
Contrast and experiment explanation:, adopt " little electrolysis-H to the water quality characteristics of this kind high concentrated organic wastewater
2O
2Advanced oxidation " process, the Fe that can effectively utilize battery lead plate ionization to produce
2+, as H
2O
2The catalyzer of oxidation, with the hardly degraded organic substance molecule chain rupture in the waste water, thus the biodegradability of raising waste water; And functional very strong to organic absorption removal, " little electrolysis-H
2O
2Advanced oxidation " technology is simple over against this kind waster water process, practicality, with strong points, and effect is remarkable.
Claims (4)
1. the pretreatment process of a high concentrated organic wastewater; Said high concentrated organic wastewater is produced by refining high-sulfur high viscous oil; The pH of said high concentrated organic wastewater is 8～10, COD is 1500～2000mg/L; BOD is 2～10mg/L, BOD/COD＜0.1, and the pretreatment process of said high concentrated organic wastewater may further comprise the steps successively:
(1), regulates waste water to pH value 6～7 according to coming the pH value of water water quality to add acid;
(2) little electrolytic oxidation: waste water is crossed the electrolytic oxidation pond, and the electrolytic oxidation pond is made up of iron-carbon dioxide process carbon electrode, electrode voltage 8～12V, and polar plate spacing 2.5～4cm adds H in the pond
2O
2500～800mg/L, waste water stopped in reaction tank 4-6 hour;
(3) waste water through little electrolytic oxidation gets into the settling tank post precipitation, gets into follow-up biochemical system.
2. pretreatment process according to claim 1, in step (1), said acid is HCl, the pH that regulates said high concentrated organic wastewater is 6.3～6.5.
3. pretreatment process according to claim 1 is in step (2), according to mass ratio H
2O
2: the ratio of COD=0.2～0.4: 1 adds H
2O
2
4. pretreatment process according to claim 1, in step (3), settling tank adopts inclined-plate clarifying basin, surface load 100m
3/ m
2D, the residence time is 40 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010296447XA CN102432135A (en) | 2010-09-29 | 2010-09-29 | Pre-treatment method for high-concentration organic waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010296447XA CN102432135A (en) | 2010-09-29 | 2010-09-29 | Pre-treatment method for high-concentration organic waste water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102432135A true CN102432135A (en) | 2012-05-02 |
Family
ID=45980544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010296447XA Pending CN102432135A (en) | 2010-09-29 | 2010-09-29 | Pre-treatment method for high-concentration organic waste water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102432135A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105347549A (en) * | 2015-11-09 | 2016-02-24 | 中油辽河工程有限公司 | Device for processing thickened oil produced water by utilization of composite advanced oxidation process and technology |
| CN106145461A (en) * | 2015-04-11 | 2016-11-23 | 上虞华杰环保有限公司 | A kind of wet oxidation catalysis and Inner electrolysis reaction unit equipment |
| CN113185066A (en) * | 2021-06-07 | 2021-07-30 | 北洋桥(天津)科技有限公司 | Sewage treatment method for high-polymer high-salt oil extraction wastewater |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101734817A (en) * | 2009-12-31 | 2010-06-16 | 江苏苏净集团有限公司 | Method for treating organic chemical waste water |
-
2010
- 2010-09-29 CN CN201010296447XA patent/CN102432135A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101734817A (en) * | 2009-12-31 | 2010-06-16 | 江苏苏净集团有限公司 | Method for treating organic chemical waste water |
Non-Patent Citations (1)
| Title |
|---|
| 邓洪君: "Fenton试剂与其他技术联合在废水处理中的应用", 《内蒙古电大学刊》, no. 2, 31 December 2007 (2007-12-31), pages 51 - 52 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106145461A (en) * | 2015-04-11 | 2016-11-23 | 上虞华杰环保有限公司 | A kind of wet oxidation catalysis and Inner electrolysis reaction unit equipment |
| CN105347549A (en) * | 2015-11-09 | 2016-02-24 | 中油辽河工程有限公司 | Device for processing thickened oil produced water by utilization of composite advanced oxidation process and technology |
| CN113185066A (en) * | 2021-06-07 | 2021-07-30 | 北洋桥(天津)科技有限公司 | Sewage treatment method for high-polymer high-salt oil extraction wastewater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103771650B (en) | A kind for the treatment of process of coal gasification waste water | |
| CN107021547B (en) | Preparation method of iron-carbon micro-electrolysis filler and product thereof | |
| CN105461135B (en) | A kind of organic petrochemical industry wastewater preprocessing process of high-concentration hardly-degradable | |
| CN102452753B (en) | Saliferous organic wastewater treatment method | |
| CN101746912A (en) | Method for treating high-concentration organic industrial waste water and equipment thereof | |
| CN106315981A (en) | Strengthened control method for Electro-Fenton pretreatment of coking organic wastewater | |
| CN110921954A (en) | Method and system for treating oilfield wastewater by combining iron-carbon micro-electrolysis and Fenton oxidation | |
| CN101693569A (en) | Device for catalyzing and oxidating ozone effectively | |
| CN204198558U (en) | A kind of trade effluent cyclic utilization system | |
| CN104445793A (en) | Ethylene waste alkali liquid standard treatment method | |
| Wang | Reuse of heavy metal from industrial effluent water | |
| CN107840495B (en) | Method for treating crude oil electric desalting wastewater | |
| CN102432135A (en) | Pre-treatment method for high-concentration organic waste water | |
| CN102674525B (en) | Method for preparing cathode for cathode electro-fenton process | |
| CN102897956A (en) | Method for treating high-arsenious wastewater | |
| CN113582439A (en) | Iron-carbon Fenton pretreatment method for acidic high-salt high-concentration organic wastewater | |
| CN111115919B (en) | Pretreatment method of pharmaceutical wastewater | |
| CN104211232A (en) | Method for coal ash and scrap iron combined treatment of dyeing and printing wastewater | |
| CN101973661B (en) | Treatment method of processing wastewater of Chinese galls | |
| Azli et al. | Removal of chemical oxygen demand (COD) and total suspended solid (TSS) using electrocoagulation process for treatment of oleochemical wastewater | |
| KR20020018572A (en) | Electro coagulation and Bio-wrinkled circulation nutrients removal system | |
| CN110117135B (en) | Garbage leachate treatment method | |
| CN106186552A (en) | The advanced treatment process of petrochemical wastewater | |
| CN111995177A (en) | Method for full-quantitative treatment of landfill leachate through electron beam irradiation | |
| CN215712477U (en) | Three-dimensional electrocatalytic oxidation and biochemical combined system for treating alkaline residue wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120502 |