CN102145966A - Method for carrying out advanced treatment on oily wastewater - Google Patents
Method for carrying out advanced treatment on oily wastewater Download PDFInfo
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- CN102145966A CN102145966A CN 201110100761 CN201110100761A CN102145966A CN 102145966 A CN102145966 A CN 102145966A CN 201110100761 CN201110100761 CN 201110100761 CN 201110100761 A CN201110100761 A CN 201110100761A CN 102145966 A CN102145966 A CN 102145966A
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Abstract
The invention relates to a method for carrying out advanced treatment on oily wastewater. The method for carrying out advanced treatment on the oily wastewater comprises the following steps of: (1) carrying out contact catalytic oxidation by down-stream ozone; (2) carrying out cyclic oxidation by multistage gas circuits; and (3) carrying out biological contact oxidation. By the method, water produced can be ensured to meet the requirement of discharge or advanced treatment of inlet water so as to provide the qualified raw water for reuse treatment of the wastewater, reduce the using amount of the conventional water and reduce the production cost.
Description
Technical field
The present invention relates to a kind of industrial oil-containing (high COD value) advanced waste treatment method, especially relate to a kind of oily wastewater treatment method that integrates multi-stage oxidizing, catalyzed oxidation, gas circulation oxidation.
Background information
Along with rapid development of economy, there is water resources famine problem in many industrial enterprises.Under this situation, in line with water-saving consumption-reduction, environmentally friendly principle, the guilding principle of " volume increase do not surge ", the utilization ratio that make full use of waste water resource, turns waste into wealth, improves water has become the task of top priority of each enterprise.Industry as industry such as the petrochemical industry of one of industry water saving major fields, iron and steel and other discharging organic wastewater, need to improve the processing reuse ability of factory effluent, the implementation system water-saving technology is transformed, utilize unconventional water source to replace surface water or underground water, even " zero release " of realization factory effluent.
Current, the development of oily(waste)water treatment process also is improvement or the The Study on New Technology at former technology shortcoming.But existing oily(waste)water treatment process, effect is still not fully up to expectations, and water quality is difficult to reach the requirement that recycles and reuses mostly.According to present waste water treatment process and functions of the equipments, high concentrated organic wastewater (high-COD waste water) or oil-containing industrial water are after multistage pre-treatment and thick oil removing, accurate oil removal by air bubbling are handled, water outlet oleaginousness (COD index) is generally between 20-50ppm, add the influence of variation water quality and system stability, this index even reach more than the 100ppm, this index has not only surpassed discharging standards, and well beyond the water quality requirement of reverse osmosis desalination processing.
Summary of the invention
The objective of the invention is to overcome existing oil-containing (high COD value) waste water treatment process and equipment and can not satisfy the defective that discharging and desalination quality of reused water require fully, a kind of advanced water treatment method that is fit to further handle the lower concentration oily(waste)water is provided.
The advanced water treatment method of the present invention's oily(waste)water may further comprise the steps:
(1) following current ozone contact catalysis oxidation: detect data according to pending oily(waste)water COD, regulate following current ozone contact catalysis oxidizing chamber ozone inlet gas concentration, pending oily(waste)water is introduced following current ozone contact catalysis oxidizing chamber carry out the following current contact oxidation, make the abundant oxygenolysis of oil in the waste water; The adjusting of ozone inlet gas concentration is chosen in 18-25mg/l to be carried out, and it is 3-5mg/l water that ozone adds concentration, and the contact oxidation time is 10-15 minute; Catalyst of transition metal oxide (preferred T410) is housed to remove wherein most of oil and other organism in the contact catalysis oxidizing chamber, significantly reduces the COD value in the water;
(2) multi-stage gas circuit cyclic oxidation: the waste water after step (1) is handled is from flowing into multi-stage gas circuit cyclic oxidation chamber, tail gas from following current ozone contact catalysis oxidizing chamber pressurizes and introducing multi-stage gas circuit cyclic oxidation chamber through the gas circulation machine, ozone concn is 1-3mg/l, carry out the circulation contact oxidation processing with the waste water of multi-stage gas circuit cyclic oxidation chamber, the contact oxidation time is 10-15 minute, further waste water is carried out oxide treatment, like this, both prolonged air water duration of contact, improve the utilization ratio of ozone, improve effluent characteristics, reduce the tail gas ozone content again, help exhaust emissions and handle;
(3) bio-contact oxidation: the waste water of handling through step (2) is carried out oil and organic content detection, determine whether that needing to introduce contact bio-oxidation device further handles; Further make bio-contact oxidation as needs and handle, then the waste water that will cross through step (2) catalytic oxidation treatment is introduced the bio-contact oxidation device and is carried out bio-contact oxidation, falls COD and handles further to carry out oil removing, guarantees effluent characteristics.
The equipment of implementing the inventive method comprises the following current ozone contact catalysis oxidizing chamber that ozonizer is installed, gas circuit cyclic oxidation chamber, bio-contact oxidation device and the correlation detection instrument that the gas circulation machine is installed, and described following current ozone contact catalysis oxidizing chamber, multi-stage gas circuit cyclic oxidation chamber, bio-contact oxidation device connect by pipeline; Be provided with catalyzer contact layer, micro-hole aerator in the described contact catalysis oxidizing chamber, can make indoor water distribution, gas distribution even; Described multi-stage gas circuit cyclic oxidation chamber is provided with dividing plate, is respectively arranged with aeration tube in every layer; Be provided with aeration tube and filler in the described contact bio-oxidation device.
Through the waste water that the inventive method is handled, the oil-contg of water quality (COD value) reaches the reuse requirement less than 5ppm.Have considerable economic, meet country's " Sustainable development " strategy, also can produce positive effect to improving water pollution and environmental aspect simultaneously.
Embodiment
The invention will be further described below in conjunction with embodiment.
The waste water water sample assemblage that following embodiment handles closes waste water, take from the waste discharge after the thick oil removing process of series such as oil removal-air supporting-biochemistry-filtration, because thick oil removing process produces effect to oil slick, and solvability oil is not had obviously effect, and it is bigger influenced by variation water quality, and the content of COD and oil is difficult to realize qualified discharge.Oleaginousness 26.8ppm in the water sample after testing, COD is 65.2mg/l.
(1) following current ozone contact catalysis oxidation: regulating following current ozone oxidation chamber ozone inlet gas concentration is 20mg/l, pending oily(waste)water introducing is equipped with in the contact catalysis oxidizing chamber of catalyst of transition metal oxide T410, carry out ozone contact catalysis oxide treatment, make the abundant oxygenolysis of oil in the waste water; The ozone inlet gas concentration is 20mg/l, and it is 4mg/l water that ozone adds concentration, and the contact oxidation time is 15 minutes; After treatment, detecting the water outlet oleaginousness is 5.2mg/l; The COD value is 26.1mg/l.
(2) multi-stage gas circuit cyclic oxidation: the waste water after step (1) is handled is from flowing into gas circuit circulation multi-stage oxidizing chamber, tail gas from the contact catalysis oxidizing chamber pressurizes and introducing gas circuit circulation multi-stage oxidizing chamber through the gas circulation machine, the ozone inlet gas concentration is 3mg/l, carry out the circulation contact oxidation processing with the waste water of gas circuit circulation multi-stage oxidizing chamber, the contact oxidation time is 15 minutes, after the processing, oleaginousness is reduced to 2.91mg/l in the water; The COD value is 16.3mg/l.
Ozone is removed to transform to the macromolecule organic of difficult degradation positive effect, benzene series thing in the water sample and condensed-nuclei aromatics are decomposed into easily biochemical small organic molecule such as ester, aldehyde, ketone and alkanes, organism (COD) total amount is significantly subdued, and will introduce the bio-contact oxidation device through the water after step (2) is handled.
(3) bio-contact oxidation: oil-contg has been reduced to 2.91mg/l in the waste water after step (2) is handled, and COD is 16.3mg/l, but qualified discharge; But be used for the de-salted water reuse, need to introduce the bio-contact oxidation device, behind bio-contact oxidation 2h, oil-contg 1.97mg/l in the water, the COD amount is reduced to 3.26mg/l.This treating water reaches the requirement of de-salted water reuse pre-treatment influent quality.
Claims (1)
1. an oily(waste)water deep treatment method is characterized in that, may further comprise the steps:
(1) following current ozone contact catalysis oxidation: detect data according to pending oily(waste)water COD, regulate following current ozone contact catalysis oxidizing chamber ozone inlet gas concentration, pending oily(waste)water is introduced following current ozone contact catalysis oxidizing chamber carry out the following current contact oxidation, make the abundant oxygenolysis of oil in the waste water; The adjusting of ozone inlet gas concentration is chosen in 18-25mg/l to be carried out, and it is 3-5mg/l water that ozone adds concentration, and the contact oxidation time is 10-15 minute; In the contact catalysis oxidizing chamber catalyst of transition metal oxide is housed,, significantly reduces the COD value in the water to remove wherein most of oil and other organism;
(2) multi-stage gas circuit cyclic oxidation: the waste water after step (1) is handled is from flowing into multi-stage gas circuit cyclic oxidation chamber, tail gas from following current ozone contact catalysis oxidizing chamber pressurizes and introducing multi-stage gas circuit cyclic oxidation chamber through the gas circulation machine, ozone concn is 1-3mg/l, carry out the circulation contact oxidation processing with the waste water of multi-stage gas circuit cyclic oxidation chamber, the contact oxidation time is 10-15 minute, further waste water is carried out oxide treatment, like this, both prolonged air water duration of contact, improve the utilization ratio of ozone, improve effluent characteristics, reduce the tail gas ozone content again, help exhaust emissions and handle;
(3) bio-contact oxidation: the waste water of handling through step (2) is carried out oil and organic content detection, determine whether that needing to introduce contact bio-oxidation device further handles; Further make bio-contact oxidation as needs and handle, then the waste water that will cross through step (2) catalytic oxidation treatment is introduced the bio-contact oxidation device and is carried out bio-contact oxidation, falls COD and handles further to carry out oil removing, guarantees effluent characteristics.
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| CN2011101007610A CN102145966B (en) | 2011-04-21 | 2011-04-21 | Method for carrying out advanced treatment on oily wastewater |
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| CN2011101007610A CN102145966B (en) | 2011-04-21 | 2011-04-21 | Method for carrying out advanced treatment on oily wastewater |
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| CN102145966B CN102145966B (en) | 2012-05-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103663668A (en) * | 2013-11-26 | 2014-03-26 | 上海交通大学 | Chemical oxidation wastewater treatment system utilizing solar heating and treatment method |
| CN104370359A (en) * | 2014-11-13 | 2015-02-25 | 南京化工职业技术学院 | Ozone contact oxidation tank and refinery wastewater advanced treatment method thereof |
Citations (4)
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| EP0933336A1 (en) * | 1998-02-02 | 1999-08-04 | Horeak AG | Waste pre-treatment and modular process comprising said pre-treatment |
| WO2007053110A1 (en) * | 2005-11-02 | 2007-05-10 | Hygieneland (Singapore) Pte. Ltd. | Treatment of wastewater |
| CN101050040A (en) * | 2007-05-14 | 2007-10-10 | 北京科技大学 | Apparatus for treating sewage containing oil, and processing technique |
| CN101244879A (en) * | 2008-03-11 | 2008-08-20 | 李户元 | Oil-containing oil emulsion waste water treatment process |
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2011
- 2011-04-21 CN CN2011101007610A patent/CN102145966B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0933336A1 (en) * | 1998-02-02 | 1999-08-04 | Horeak AG | Waste pre-treatment and modular process comprising said pre-treatment |
| WO2007053110A1 (en) * | 2005-11-02 | 2007-05-10 | Hygieneland (Singapore) Pte. Ltd. | Treatment of wastewater |
| CN101050040A (en) * | 2007-05-14 | 2007-10-10 | 北京科技大学 | Apparatus for treating sewage containing oil, and processing technique |
| CN101244879A (en) * | 2008-03-11 | 2008-08-20 | 李户元 | Oil-containing oil emulsion waste water treatment process |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103663668A (en) * | 2013-11-26 | 2014-03-26 | 上海交通大学 | Chemical oxidation wastewater treatment system utilizing solar heating and treatment method |
| CN103663668B (en) * | 2013-11-26 | 2015-01-21 | 上海交通大学 | Chemical oxidation wastewater treatment system utilizing solar heating and treatment method |
| CN104370359A (en) * | 2014-11-13 | 2015-02-25 | 南京化工职业技术学院 | Ozone contact oxidation tank and refinery wastewater advanced treatment method thereof |
| CN104370359B (en) * | 2014-11-13 | 2016-04-27 | 南京科技职业学院 | A kind of method of O3 contacted oxidation pond and advanced treatment refinery water thereof |
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| CN102145966B (en) | 2012-05-09 |
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