CN101381187A - Waste water centralized processing method in chemical industrial park - Google Patents
Waste water centralized processing method in chemical industrial park Download PDFInfo
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- CN101381187A CN101381187A CNA2008101553567A CN200810155356A CN101381187A CN 101381187 A CN101381187 A CN 101381187A CN A2008101553567 A CNA2008101553567 A CN A2008101553567A CN 200810155356 A CN200810155356 A CN 200810155356A CN 101381187 A CN101381187 A CN 101381187A
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Abstract
The invention discloses a centralized wastewater treatment method for chemical industrial parks, which belongs to the field of wastewater treatment. The method comprises the following steps: chemical wastewater is first pretreated through electrolysis; then the wastewater is subjected to biochemical treatment through an efficient biological flow bed reactor or an intermittent aeration biological granular bed reactor; and finally, the wastewater is subjected to advanced treatment through an ozone-activated carbon process. The method has the advantages that the method can adopt a pretreatment technique adapted to various water qualities of chemical wastewater to treat the chemical wastewater fast and efficiently according to the characteristic that the production wastewater of the chemical industrial parks is different in water quality and emission standard, develops a wastewater treatment integration technique for the chemical industrial parks, which combines point source pretreatment with centralized treatment and takes biological treatment as a core, realizes a safe treatment technique for tail water, has effluent indices meeting recycling standards, and is convenient for large-scale industrial application.
Description
Technical field
The present invention relates to a kind of wastewater treatment method, a kind of specifically method of chemical industrial park Wastewater Concentrated.
Background technology
Chemical industry is one of mainstay industry of China, has also caused huge pressure to environmental protection work when bringing great economic benefit to national economy.Recent years, the construction development of China's chemical industrial park is very fast, has become the focus of foreign capital investment and Economic Growth.Therefore, environmental problems such as water resource pollution have become the key of restriction chemical industrial park Sustainable development, carry out the applied research of garden wastewater processing technology, for the handling problem that effectively solves trade effluent in park building and the evolution provides technical support, to promoting the Sustainable development of chemical industrial park, the industrial competitiveness of cultivating and promote chemical industrial park plays crucial effects.
The chemical industrial park trade effluent is the set of number of chemical product factory effluent, and the most tangible characteristics are water quality composition complexity, toxic organic pollutant concentration height, total salinity height, are a kind of typical high-concentration hardly-degradable poisonous and harmful waste water.In China, the generation of organic chemical waste water increases year by year, only nineteen ninety-five China's trade effluent (not comprising township and village enterprises) quantity discharged just reaches 22,300,000,000 tons, contain ten thousand tons of COD770,1823 tons in heavy metal, 1132 tons of arsenic, 2504 tons of prussiates, 6366 tons of volatile phenols, 64341 tons of petroleum-type, wherein only 12,300,000,000 tons of waste water reach emission standard, rest part, especially the chemical industrial park trade effluent has caused serious pollution to environment.At present, the chemical industrial park trade effluent there is not cost-effective countermeasured to bring inflation under control as yet.Adopt physico-chemical process to handle such waste water, cost is very high, ton water treatment expense reaches tens of units, directly adopt biochemical process to handle such waste water, be difficult to effective processing, its reason is the COD height of waste water, can not directly adopt the routine biochemistry method to handle, or because contain some compound that biology can not be degraded in the waste water, as polycyclic aromatic hydrocarbons, carcinogens benzopyrene and ammonia nitrogen etc.High processing costs makes a large amount of chemical industrial park trade effluents can not get effectively handling and discharges, so its improvement technology is improved in the improvement of research chemical industrial park trade effluent, is very urgent task.
At present, the discharging of the in short supply and pollutent of water resources has become the conditionality factor that chemical industry develops, and along with the raising day by day of strictness, effluent charge day by day of emission standard, the reuse of wastewater from chemical industry draws attention gradually.But, because the water yield of wastewater from chemical industry is big, complex treatment process, operational management inconvenience has influenced applying of chemical wastewater treatment and reuse technology.
The method and apparatus that China handles wastewater from chemical industry mainly is the method and apparatus that prolongs usefulness " old three covers ", and waste water is through the neutralization tank neutralization, and oil trap is removed oil slick, and flotation cell carries out flotation, carries out biochemical treatment through the aeration tank then, filters through sand filter at last.Along with development economic and society, the chemical kind of producing is more and more, the water-quality constituents of wastewater from chemical industry becomes increasingly complex, this traditional treatment process can not satisfy the requirement of wastewater treatment, subject matter has: at first, pre-treatment can not effectively be removed at the waste water composition of complexity or part is removed pollution substance, prevents the fluctuation of the water quality and the water yield, satisfies the processing requirement of subsequent biological treatment; Secondly, the xenobiotic that has structural complexity and biological strange property in a large number is in waste water, and conventional biological treatment system is difficult at short notice with its decomposing oxidation; At last, tail water is handled and can not effectively small molecules toxic pollutant matter be removed, and has influenced the water quality of water outlet, to chemical industrial park ambient water environment existence harm or potential threat to a certain degree.
Summary of the invention
1. invent the technical problem that will solve
At the existing problem of chemical industrial park waste water treatment process in the prior art, the invention provides a kind of method of chemical industrial park Wastewater Concentrated, can improve waste water treatment efficiency, reduce the wastewater treatment expense, prolong the work-ing life of treatment facility.
2. technical scheme of the present invention
Technical scheme of the present invention is as follows:
A kind of method of chemical industrial park Wastewater Concentrated, its step comprises:
(1) wastewater from chemical industry is introduced electrolyzer, the pH value of regulating waste water is 6.0～9.0, and the control electrolysis time is 20～60min, and electrolytic tension is 5～10V, carries out electrolytic reaction;
(2) effluent COD concentration in the step (1) is controlled to be 500～1500mg/L, the ammonia nitrogen concentration of regulating waste water is 25～75mg/L, and phosphate concn is 5～15mg/L, and the pH value is 5.0～7.5, enter bio-reactor then and handle, the residence time is 12～24h;
(3) effluent COD concentration in the step (2) is controlled to be 100～200mg/L, passes through ozone-activated carbon process then and handle.
Adopt dilute sulphuric acid or Ca (OH) in the step (1)
2As the pH regulator agent.
Bio-reactor described in the step (2) is a kind of in high-performance bio flowing bed reactor or the intermittent aeration biological particles bed bioreactor.The high-performance bio flowing bed reactor, the reaction tower bottom is provided with water distributor, and reaction tower also is provided with distribution device, and top is provided with triphase separator, and the top is provided with water outlet or effluent weir, and the centre is the aerobic bed unit, the surface is housed is covered with biomembranous bio-carrier.Intermittent aeration biological particles bed bioreactor, move according to the periodical operation of certain hour order, each cycle of operation comprises into water, reaction, precipitation, draining and zero load, period is 0.5～1h, 8～16h, 2～4h, 0.5～1h, 1～2h respectively, per 12～24h is an one-period, the surface is housed in the reaction tank is covered with biomembranous bio-carrier.Bio-carrier in the bio-reactor is the particle that haydite, gac, zeolite etc. have loading functional.The trace compound CoCl that before entering bio-reactor, in waste water, adds
26H
2O, MnCl
24H
2O, ZnCl
2, NiCl
26H
2O and (NH
4)
6Mo
7O
24Mixture, make that the concentration of trace compound is 1～80 μ g/L, compound wherein.The volumetric loading of bio-reactor is 0.5～3kgCOD/ (m
3D).What be used for regulating ammonia nitrogen in the waste water is ammonium chloride or ammonium sulfate, and regulating phosphatic in the waste water is sodium phosphate, potassiumphosphate, Sodium phosphate dibasic, dipotassium hydrogen phosphate, SODIUM PHOSPHATE, MONOBASIC or potassium primary phosphate.
In employed ozone-activated carbon process, the ozone dosage is 5～20mg/L in the step (3), and the residence time of waste water in ozone contact jar is 10～30min.
In employed ozone-activated carbon process, the residence time of waste water in absorbent charcoal adsorption tank is 10～30min in the step (3).
3. beneficial effect
The invention provides a kind of method of chemical industrial park Wastewater Concentrated, can be according to the chemical industrial park factory effluent water quality characteristic characteristics different with emission request, adopted the preconditioning technique that adapts to multiple wastewater from chemical industry water quality, fast, handled efficiently, what developed " point source pre-treatment with focus on combine " is the chemical industrial park wastewater treatment integrated technology of core with the biological treatment, realized tail water safe handling technology, effluent index reaches reuse standard, can save simultaneously the expense of wastewater treatment, prolong the work-ing life of advanced treatment equipment, be easy to heavy industrialization and use.
Embodiment
Embodiment 1
Wastewater from chemical industry is incorporated into carries out electrolysis in the electrolyzer, the pH value of regulating waste water is 6.0, and the control electrolysis time is 30min, and electrolytic tension is 10V; Then effluent COD concentration is controlled to be 1000mg/L by thin up, with dilute sulphuric acid or Ca (OH)
2Regulating the pH value is 6.0, and ammonia nitrogen concentration is 50mg/L in the adding ammonium chloride adjusting waste water, and phosphate concn is 10mg/L in the adding potassiumphosphate adjusting waste water, adds trace compound CoCl
26H
2O, MnCl
24H
2O, ZnCl
2, NiCl
26H
2O and (NH
4)
6Mo
7O
24Mixture after enter the high-performance bio thermopnore, make that concentration is 20～40 μ g/L, the residence time is 18h, the employing haydite is a bio-carrier; At last effluent COD concentration is controlled to be 100mg/L, handle through ozone-activated carbon process, the ozone dosage is 10mg/L, the residence time of waste water in ozone contact jar is 10min, the residence time in absorbent charcoal adsorption tank is 30min, water outlet reaches the requirement of chemical industrial park waste water recycling, the water outlet after can the part Treatment for Reuse.
Embodiment 2
Wastewater from chemical industry enters electrolyzer and carries out electrolysis, and the pH value of regulating waste water is 7.0, and the control electrolysis time is 20min, and electrolysis pressure is 8V; Then effluent COD concentration is controlled to be 1500mg/L, regulating the pH value is 7.0, and ammonia nitrogen concentration is 75mg/L in the adding ammonium sulfate adjusting waste water, and phosphate concn is 15mg/L in the adding potassium primary phosphate adjusting waste water, adds trace compound CoCl
26H
2O, MnCl
24H
2O, ZnCl
2, NiCl
26H
2O and (NH
4)
6Mo
7O
24Mixture, make that concentration is 1～20 μ g/, enter intermittent aeration biological particles bed, each cycle of operation of intermittent aeration biological particles bed comprises into water, reaction, precipitation, draining and zero load, period is 0.5h, 10h, 3h, 0.5h, 2h respectively, every 16h is an one-period, and adopting zeolite in the reaction tank is bio-carrier; At last effluent COD concentration is controlled to be 200mg/L, handle through ozone-activated carbon process, the ozone dosage is 20mg/L, the residence time of waste water in ozone contact jar is 30min, the residence time in absorbent charcoal adsorption tank is 20min, water outlet reaches the requirement of chemical industrial park waste water recycling, the water outlet after can the part Treatment for Reuse.
Embodiment 3
Wastewater from chemical industry is introduced in electrolyzer and handles, and the pH value of regulating waste water is 9.0, and the control electrolysis time is 60min, and electrolysis pressure is 5V; Then effluent COD concentration is controlled to be 500mg/L, regulating the pH value is 7.0, and the ammonia nitrogen concentration that adds ammonium sulfate adjusting waste water is 25mg/L, and the phosphate concn that adds SODIUM PHOSPHATE, MONOBASIC adjusting waste water is 5mg/L, adds trace compound CoCl
26H
2O, MnCl
24H
2O, ZnCl
2, NiCl
26H
2O and (NH
4)
6Mo
7O
24Mixture, make that concentration is 60～80 μ g/L, enter the high-performance bio thermopnore, the residence time is 24h, the employing gac is a bio-carrier; At last effluent COD concentration is controlled to be 100mg/L, handle through ozone-activated carbon process, the ozone dosage is 5mg/L, the residence time of waste water in ozone contact jar is 20min, the residence time in absorbent charcoal adsorption tank is 10min, water outlet reaches the requirement of chemical industrial park waste water recycling, the water outlet after can the part Treatment for Reuse.
Embodiment 4
Wastewater from chemical industry is introduced electrolyzer carry out electrolysis, the pH value of regulating waste water is 8.0, and the control electrolysis time is 30min, and electrolysis pressure is 9V; Then effluent COD concentration is controlled to be 1000mg/L, regulating the pH value is 6.0, and the ammonia nitrogen concentration that adds ammonium chloride adjusting waste water is 50mg/L, and the phosphate concn that adds Sodium phosphate dibasic adjusting waste water is 10mg/L, adds the CoCl of trace compound
26H
2O, MnCl
24H
2O, ZnCl
2, NiCl
26H
2O and (NH
4)
6Mo
7O
24Mixture, make that concentration is 40～60 μ g/L, enter intermittent aeration biological particles bed, each cycle of operation of intermittent aeration biological particles bed comprises into water, reaction, precipitation, draining and zero load, period is 1h, 14h, 2h, 1h, 2h respectively, every 20h is an one-period, and adopting haydite in the reaction tank is bio-carrier; At last effluent COD concentration is controlled to be 200mg/L, handle through ozone-activated carbon process, the ozone dosage is 15mg/L, the residence time of waste water in ozone contact jar is 30min, the residence time in absorbent charcoal adsorption tank is 20min, water outlet reaches the requirement of chemical industrial park waste water recycling, the water outlet after can the part Treatment for Reuse.
Embodiment 5
Wastewater from chemical industry enters in the electrolyzer and handles, and the pH value of regulating waste water is 7.0, and the control electrolysis time is 50min, and electrolysis pressure is 7V; Then effluent COD concentration is controlled to be 1500mg/L, regulating the pH value is 7.5, and the ammonia nitrogen concentration that adds ammonium chloride adjusting waste water is 75mg/L, and the phosphate concn that adds sodium phosphate adjusting waste water is 15mg/L, adds the CoCl of trace compound
26H
2O, MnCl
24H
2O, ZnCl
2, NiCl
26H
2O and (NH
4)
6Mo
7O
24Mixture, make that concentration is 60～80 μ g/L, enter the high-performance bio thermopnore, the residence time is 12h, the employing gac is a bio-carrier; At last effluent COD concentration is controlled to be 200mg/L, handle through ozone-activated carbon process, the ozone dosage is 15mg/L, the residence time of waste water in ozone contact jar is 10min, the residence time in absorbent charcoal adsorption tank is 30min, water outlet reaches the requirement of chemical industrial park waste water recycling, the water outlet after can the part Treatment for Reuse.
Embodiment 6
Wastewater from chemical industry is introduced electrolyzer carry out electrolysis, the pH value of regulating waste water is 8.0, and the control electrolysis time is 40min, and electrolysis pressure is 6V; Then effluent COD concentration is controlled to be 500mg/L, regulating the pH value is 5.0, and the ammonia nitrogen concentration that adds ammonium sulfate adjusting waste water is 25mg/L, and the phosphate concn that adds dipotassium hydrogen phosphate adjusting waste water is 5mg/L, adds trace compound CoCl
26H
2O, MnCl
24H
2O, ZnCl
2, NiCl
26H
2O and (NH
4)
6Mo
7O
24Mixture, make that concentration is to enter intermittent aeration biological particles bed behind 20～40 μ g/L, each cycle of operation of intermittent aeration biological particles bed comprises into water, reaction, precipitation, draining and zero load, period is 0.5h, 8h, 2h, 0.5h, 1h respectively, every 12h is an one-period, and adopting zeolite in the reaction tank is bio-carrier; At last effluent COD concentration is controlled to be 100mg/L, handle through ozone-activated carbon process, the ozone dosage is 20mg/L, the residence time of waste water in ozone contact jar is 10min, the residence time in absorbent charcoal adsorption tank is 10min, water outlet reaches the requirement of chemical industrial park waste water recycling, the water outlet after can the part Treatment for Reuse.
Claims (5)
1. the method for a chemical industrial park Wastewater Concentrated, its step comprises:
(1) wastewater from chemical industry is introduced electrolyzer, the pH value of regulating waste water is 6.0～9.0, and the control electrolysis time is 20～60min, and voltage is 5～10V, carries out electrolytic reaction;
(2) effluent COD concentration in the step (1) is controlled to be 500～1500mg/L, the ammonia nitrogen concentration of regulating waste water is 25～75mg/L, and phosphate concn is 5～15mg/L, and the pH value is 5.0～7.5, enter bio-reactor then and handle, the residence time is 12～24h;
(3) effluent COD concentration in the step (2) is controlled to be 100～200mg/L, passes through ozone-activated carbon process then and handle.
2. the method for a kind of chemical industrial park Wastewater Concentrated according to claim 1 is characterized in that the bio-reactor described in the step (2) is high-performance bio flowing bed reactor or intermittent aeration biological particles bed bioreactor.
3. the method for a kind of chemical industrial park Wastewater Concentrated according to claim 2 is characterized in that waste water added trace compound CoCl in the step (2) before entering bio-reactor
26H
2O, MnCl
24H
2O, ZnCl
2, NiCl
26H
2O and (NH
4)
6Mo
7O
24Mixture, make that the concentration in the waste water is 1～80 μ g/L.
4. according to the method for each described a kind of chemical industrial park Wastewater Concentrated in the claim 1～3, what it is characterized in that being used for regulating in the step (2) ammonia nitrogen concentration in the waste water is ammonium chloride or ammonium sulfate, and what regulate phosphate concn in the waste water is sodium phosphate, potassiumphosphate, Sodium phosphate dibasic, dipotassium hydrogen phosphate, SODIUM PHOSPHATE, MONOBASIC or potassium primary phosphate.
5. according to the method for each described a kind of chemical industrial park Wastewater Concentrated in the claim 1～3, it is characterized in that in the ozone-activated carbon process described in the step (3), the ozone dosage is 5～20mg/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101553567A CN101381187B (en) | 2008-10-21 | 2008-10-21 | Waste water centralized processing method in chemical industrial park |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101553567A CN101381187B (en) | 2008-10-21 | 2008-10-21 | Waste water centralized processing method in chemical industrial park |
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| Publication Number | Publication Date |
|---|---|
| CN101381187A true CN101381187A (en) | 2009-03-11 |
| CN101381187B CN101381187B (en) | 2010-09-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103523769A (en) * | 2013-10-08 | 2014-01-22 | 中国农业大学 | Composite charcoal, and preparation method and application thereof |
| CN103613254A (en) * | 2013-12-18 | 2014-03-05 | 中国市政工程中南设计研究总院有限公司 | Method for deep treatment of refractory organic wastewater of sewage treatment plant in fine chemical industry park |
| CN110759583A (en) * | 2019-09-24 | 2020-02-07 | 天津禹信环保科技有限公司 | Industrial wastewater's cyclic utilization equipment |
-
2008
- 2008-10-21 CN CN2008101553567A patent/CN101381187B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103523769A (en) * | 2013-10-08 | 2014-01-22 | 中国农业大学 | Composite charcoal, and preparation method and application thereof |
| CN103613254A (en) * | 2013-12-18 | 2014-03-05 | 中国市政工程中南设计研究总院有限公司 | Method for deep treatment of refractory organic wastewater of sewage treatment plant in fine chemical industry park |
| CN103613254B (en) * | 2013-12-18 | 2016-03-09 | 中国市政工程中南设计研究总院有限公司 | The deep treatment method of fine chemistry industry garden sewage work organic wastewater with difficult degradation thereby |
| CN110759583A (en) * | 2019-09-24 | 2020-02-07 | 天津禹信环保科技有限公司 | Industrial wastewater's cyclic utilization equipment |
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| Publication number | Publication date |
|---|---|
| CN101381187B (en) | 2010-09-22 |
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Granted publication date: 20100922 Termination date: 20211021 |