CN102826632A - In-situ adsorption-microelectrolysis-catalytic oxidation sewage treatment equipment and method - Google Patents
In-situ adsorption-microelectrolysis-catalytic oxidation sewage treatment equipment and method Download PDFInfo
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- CN102826632A CN102826632A CN201210254876XA CN201210254876A CN102826632A CN 102826632 A CN102826632 A CN 102826632A CN 201210254876X A CN201210254876X A CN 201210254876XA CN 201210254876 A CN201210254876 A CN 201210254876A CN 102826632 A CN102826632 A CN 102826632A
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Abstract
The invention discloses in-situ adsorption-microelectrolysis-catalytic oxidation sewage treatment equipment and method, belonging to the technical field of sewage treatment in environment engineering. The in-situ adsorption-microelectrolysis-catalytic oxidation sewage treatment equipment is characterized in that adsorption equipment, electrolysis equipment and catalytic oxidation equipment are integrated so as to gather enable pollutants to be gathered from a low-concentration water phase onto an adsorbent; by using the favorable electric conductivity, the adsorbent is used as a complexly polarized three-dimensional electrode to form countless micro electrolytic baths, so that the organic pollutants are electrolyzed while organic matters are adsorbed, and adsorption active sites are continuously regenerated; and by utilizing an electric insulation material, the three-dimensional electrode is complexly polarized and has a high-class oxidation catalyst function at the same time, so that a gas oxidant dissolved in water and an oxidant generated by side reaction of the electrode form a high-class oxidant to efficiently remove the organic pollutants. According to the equipment and the method, the problems of slow reaction speed, low space-time efficiency, low current efficiency and low pollutant degradation efficiency in the conventional electrolytic reactors are solved, and an excellent market prospect is provided.
Description
Technical field
The invention belongs to the technical field of sewage in the environmental engineering, relate to a kind of sewage disposal device and method of adsorbing catalytic and oxidative electrolysis technology.
Background technology
The Persistent organic pollutants wide material sources.The Persistent organic pollutants that not only comprise traditional various source of pollution discharge of wastewater also comprise in the routine biochemistry processing secondary effluent, the metabolic difficult degradation pollutent of difficult degradation pollutent that biodegradation process is secondary and biology self.The organic pollutant of these difficult degradations is very harmful to soil and water body environment.To the processing of hardly degraded organic substance waste water, the most effectively treatment technology be adsorption treatment and advanced oxidation treatment technology (advanced oxidation processes, AOPs).The adsorption treatment technology is simple, and can make waste water reach very low emission standard, but can not destroy pollutent, also needs follow-up adsorbent reactivation process, so that the recycling of sorbent material reduces processing cost.Usually, the AOPs technology is complicated, but mineralising organic pollutant that can non-selectivity, thereby effectively reduces the discharging of COD.The electrolytic oxidation technology is compared with AOPs, have easy and simple to handle, with advantages such as environment compatibility is strong.Yet the electrolytic oxidation organism is compared with inorganics, and the current consumption of its mole is high, and mineralising organic pollutant speed is low.And electrolysis reactor is limited to two-dimensional electrode usually, so that the reactor drum spatiotemporal efficiency is low.In addition, in the organic process of electrolytic oxidation, follow the electrolysis side reaction of water inevitably, cause current efficiency to reduce.
Summary of the invention
The present invention is directed to the various waste water that contain Persistent organic pollutants that extensively exist at present, a kind of method and apparatus of original position absorption-little electrolysis-catalytic oxidation treatment organic wastewater with difficult degradation thereby is provided.Its purpose is: (1) makes absorption, electrolysis and catalyzed oxidation equipment integrated.In integration apparatus, to adsorb simultaneously, electrolysis and catalytic oxidation process, the methods such as tradition absorption separates with reclaim equiment, chemical regeneration, heat regeneration that solve are invested problems such as working cost height; (2) make the electrolysis reactor filler have the triple functions property of sorbent material, microelectrode and catalyzer, solve that traditional electrolysis reactor reaction speed is slow, spatiotemporal efficiency is low, current efficiency is low and the inefficient problem of contaminant degradation.Therefore, the present invention has important practical significance for energy-saving and emission-reduction.
Basic fundamental characteristic of the present invention is; Between the feed electrode, fill mixed fillers; Mixed fillers is made up of filler material and catalyzer; Mixed fillers has absorption, conduction, electrical isolation and catalysis characteristics, utilizes: (1) absorption property, with organic pollutant from the lower concentration water enrichment to sorbing material; (2) excellent conductive performance that has simultaneously of sorbing material as the multipole three-diemsnional electrode, is formed countless miniature electrolyzers, electrolysis organic pollutant in adsorb organic compound, and the adsorption activity position is by continuously regeneration; (3) electrically insulating material makes the three-diemsnional electrode repolarization, its advanced oxidation catalysis that has simultaneously, and the oxygenant that dissolved gases oxygenant in the water and electrode side reaction are produced forms the advanced oxidation agent, efficiently removes organic pollutant.
Technical solution of the present invention is following:
The sewage disposal device of a kind of original position absorption-little electrolysis-catalyzed oxidation according to the invention adopts fixed bed new electrobath structure formation, and cell body is a rectangle; Positive and negative feed electrode is a tabular, and vertical parallel alternately is placed in the groove, filling mixed fillers between the feed electrode.Power supply is used constant voltage dc source, Voltage pulsating direct-current supply or high frequency pulse dc power supply, and it is different and different with water quality to look process object, and voltage of supply adopts 36 volts following safety voltages.In the middle of actual engineering application, confirm positive and negative feed electrode logarithm according to the size of handling the water yield.Bantam adopts a pair of positive and negative feed electrode.When handling the water yield when bigger, often need main equipment to satisfy corresponding treatment scale, adopt manyly to positive and negative feed electrode, so that work down, make strength of electric field at 1～10v/cm in low voltage (36V).The feed electrode materials is with inert material, noble metal material or steel, looks use occasion and current density size and decides.
Sewage disposal device of the present invention comprises equipment supporter, lower cover, following filler back up pad, lower flange; The lower flange bolt, electrode draw-in groove, upper flange bolt, upper backup pad, upper flange; Contact conductor, plate electrode, upper cover, backwashing water outlet, rising pipe; Equipment body, mixed fillers, water-in, backwashing water inlet.Wherein, backwashing water inlet and water-in are arranged on the lower cover, and the backwashing water outlet is arranged on the upper cover; Mixed fillers receives down the support of filler back up pad, is seated in equipment body inside, and the mixed fillers layer height is 1/3 to 3/4 of following filler back up pad and upper backup pad spacing; Between each positive and negative feed electrode of mixed filler layer upper end, be provided with water outlet, each water outlet links to each other with rising pipe.
The sewage water treatment method of sewage disposal device according to the invention is that treatment sewage flows into equipment from water-in, adsorbs-little electrolysis-catalytic oxidation through mixed filler layer, purifies waste water and discharges from rising pipe.The hydraulic detention time of treatment sewage changed in 0.5-3 hour, depended primarily on former water pollutant concentration: when Pollutant levels are high the residence time longer, the residence time was shorter when concentration was low; Also require relevant with needed water quality of processed water simultaneously: effluent quality requires high more, and the residence time is long more.When current efficiency descends, carry out back flushing, water is introduced equipment from the backwashing water import, behind the flushing mixed filler layer, discharge from the backwashing water outlet.
Sewage disposal device of the present invention, its mixed fillers is made up of filler material and catalyzer; Filler material has the characteristic of absorption, conduction, electrical isolation; Comprise zeolite, silica sand, gac, graphite, coke, sulphonated coal, silica gel, molecular sieve, aluminum oxide or resin; Peat, shell, PVC plastics, waste or used plastics, some filler material has dual material behavior; Catalyst loading is on the surface of electrically insulating material, and catalyzer comprises red stone, cupric oxide or iron ion, cupric ion.The mixed fillers ratio is: electro-conductive material or sorbing material/electrically insulating material=1/1-1/10, and catalyzer/electrically insulating material=1/10-1/1000, the filler material particle diameter is: the 8-100 order.
The invention has the beneficial effects as follows:
It is wide that sewage disposal device of the present invention is suitable for the sewage type scope of handling.This equipment can be used for comprising: the processing of industrial sewages such as oil, chemical industry, printing and dyeing, mechanical workout, city domestic sewage, hotels' life and bath sewage are handled water supply purification, processes such as middle water reuse.Can be used for removing all kinds of organic pollutants, in the particularly biochemical treatment process biology is had removing of the removing of the removing of inhibiting pollutent, biological metabolic product, micro-content organism.
It is wide that sewage disposal device of the present invention is suitable for the concentration of wastewater scope of handling.For the high concentration organic sewage of COD (COD) greater than 1000mg/L, this equipment can improve COD minimizing, the biodegradability of sewage in the pre-treatment of sewage, is beneficial to the postorder treating processes of sewage.For the low-concentration organic wastewater of COD less than 500mg/L, particularly adopt residual biological non-degradable pollutent after the biochemical treatment, this equipment is effective especially, and the draining Pollutant levels are further reduced, and reaches emission standard.This equipment also can be used for the advanced treatment of COD less than the slight sewage of 100mg/L, to reach the quality of reused water requirement.
Sewage disposal device cost of sewage disposal of the present invention is low.This equipment depends primarily on the concentration and the conductive ion intensity of pollutent to the processing cost of sewage.As long as inorganic salt concentration is not more than 2000mg/L, conductive ion intensity is not high, specific conductivity little, leakage current is lower, is example to handle the sewage of COD below 1000mg/L, and power consumption is at 0.2-0.8KWH/ ton water.
Sewage disposal device of the present invention, treating processes is simple, can realize operate continuously, control automatically, does not need manual maintenance and operation basically.
Description of drawings
Fig. 1 is sewage disposal device structure of the present invention and outside view.
Embodiment
Employing should technology be carried out advanced treatment and reclamation to enterprise of petrochemical refining sewage.The negative electrode and the anode of equipment used are graphite, and power supply is a direct supply, are mixed fillers with gac with supporting the iron zeolite, and the mixed fillers ratio is: gac/support iron zeolite=1/3, and iron/zeolite=1/200, granularity is 10 orders.Original oil refining sewerage after conventional two stage biological is handled COD content below 100mg/L.Sewage after two stage biological is handled gets into this equipment continuously and carries out advanced treatment; Hydraulic detention time is 1 hour; Water outlet COD content is lower than elementary reuse water water quality standard 40mg/L in the oil-refining chemical enterprise reusing sewage management guideline at 20～30mg/L, and power consumption is a 0.6KWH/ ton water.This water can be back to circulating cooling make-up water.
Adopt the advanced treatment of this technology to oilfield produced water.The anode of equipment used is a graphite, and negative electrode is a carbon steel, and power supply is a direct supply, is mixed fillers with gac and silica sand, and the mixed fillers ratio is: gac/silica sand=1/2, granularity are the 10-20 order.Original oily(waste)water is removed oil slick through removing oil tank, and after the pre-treatment of sand filtration operation, oil-contg is below 100mg/L again.Get into this equipment continuously through pretreated sewage and carry out advanced treatment, hydraulic detention time 1 hour, water outlet oil-contg are lower than oil field reuse water standard 5mg/L at 2-3 mg/L, and power consumption is a 0.6KWH/ ton water.This water can be after desalination re-injection in the oil field.
Embodiment 3
Adopt the advanced treatment of this technology to sewage.The negative electrode and the anode of equipment used are graphite, and power supply is a direct supply, are mixed fillers with gac and sulphonated coal, and the mixed fillers ratio is: gac/sulphonated coal=1/2, granularity are the 10-16 order.COD is the sewage of 200-300mg/L, and after sedimentation, biochemical treatment, COD is reduced to about 100mg/L.Sewage after two stage biological is handled gets into this equipment continuously and carries out advanced treatment, and hydraulic detention time 1 hour, water outlet COD reach water reuse standard in the national urban wastewater treatment firm less than 50mg/L, power consumption 0.5KWH/ ton water.This water can be used as middle water reuse.
Claims (5)
1. the sewage disposal device of an original position absorption-little electrolysis-catalyzed oxidation is characterized in that: this sewage disposal device adopts fixed bed new electrobath structure, and cell body is a rectangle; At least one pair of flat positive and negative feed electrode, vertical parallel alternately is placed in the groove, filling mixed fillers between the feed electrode; Power supply is with constant voltage dc source, Voltage pulsating direct-current supply or high frequency pulse dc power supply, and voltage of supply is below 36 volts, and strength of electric field is at 1～10 volt/centimetre; The feed electrode materials is with inert material, noble metal material or steel.
2. sewage disposal device according to claim 1 comprises equipment supporter, lower cover, following filler back up pad, lower flange; The lower flange bolt, electrode draw-in groove, upper flange bolt, upper backup pad, upper flange; Contact conductor, plate electrode, upper cover, backwashing water outlet, rising pipe; Mixed fillers, equipment body, water-in, backwashing water inlet; It is characterized in that: backwashing water inlet and water-in are arranged on the lower cover, and the backwashing water outlet is arranged on the upper cover; Mixed fillers receives down the support of filler back up pad, is seated in equipment body inside, and the mixed fillers layer height is 1/3 to 3/4 of following filler back up pad and upper backup pad spacing; Between each positive and negative feed electrode of mixed filler layer upper end, be provided with water outlet, each water outlet links to each other with rising pipe.
3. sewage disposal device according to claim 1 and 2, its characteristic also is: mixed fillers is made up of filler material and catalyzer; Filler material has the characteristic of absorption, conduction and electrical isolation, comprises zeolite, silica sand, gac, graphite, coke, sulphonated coal, silica gel, molecular sieve, aluminum oxide or resin, peat, shell, PVC plastics, waste or used plastics; Catalyst loading is on the surface of electrically insulating material, and catalyzer comprises red stone, cupric oxide or iron ion, cupric ion; The mixed fillers ratio is: electro-conductive material or sorbing material/electrically insulating material=1/1-1/10, and catalyzer/electrically insulating material=1/10-1/1000, the filler material particle diameter is: the 8-100 order.
4. the sewage water treatment method of claim 1 or 2 said sewage disposal devices, it is characterized in that: treatment sewage flows into equipment from water-in, adsorbs-little electrolysis-catalytic oxidation through mixed filler layer, purifies waste water and discharges from rising pipe; The hydraulic detention time of treatment sewage was at 0.5-3 hour; When current efficiency descends, carry out back flushing, water is introduced equipment from the backwashing water import, behind the flushing mixed filler layer, discharge from the backwashing water outlet.
5. the sewage water treatment method of the said sewage disposal device of claim 3, it is characterized in that: treatment sewage flows into equipment from water-in, adsorbs-little electrolysis-catalytic oxidation through mixed filler layer, purifies waste water and discharges from rising pipe; The hydraulic detention time of treatment sewage was at 0.5-3 hour; When current efficiency descends, carry out back flushing, water is introduced equipment from the backwashing water import, behind the flushing mixed filler layer, discharge from the backwashing water outlet.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103214066A (en) * | 2013-05-20 | 2013-07-24 | 天津工业大学 | New method for preprocessing high-salt dye wastewater |
| CN103754990A (en) * | 2013-12-19 | 2014-04-30 | 天津工业大学 | Bipolar three-dimension electrode coupling treatment device for treatment of non-biodegradable organic wastewater |
| CN105016431A (en) * | 2015-07-23 | 2015-11-04 | 王麒钧 | Method and apparatus for removal and recovering of heavy metal ions from wastewater |
| CN105523625A (en) * | 2016-01-15 | 2016-04-27 | 济南大学 | Water purifying system for silver-plating wastewater and water purifying method |
| CN106115865A (en) * | 2016-08-25 | 2016-11-16 | 苏州市水知道环保科技有限公司 | Electrolysis feed arrangement |
| WO2017054256A1 (en) * | 2015-09-29 | 2017-04-06 | 北京大学 | Method for recovering oil contamination by means of carbon nanotube sponge and electrically controlled oil displacing technique |
| CN107162119A (en) * | 2017-06-23 | 2017-09-15 | 湘潭大学 | A kind of method and apparatus of complete mixing flow waste water three-dimensional electrolysis |
| CN111112324A (en) * | 2019-12-20 | 2020-05-08 | 清华大学 | Organic pollutant treatment device and equipment in soil and underground water |
| CN114054484A (en) * | 2020-07-31 | 2022-02-18 | 中国石油化工股份有限公司 | Permeable reactive barrier and method for repairing polluted underground water by permeable reactive barrier |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103214066A (en) * | 2013-05-20 | 2013-07-24 | 天津工业大学 | New method for preprocessing high-salt dye wastewater |
| CN103754990A (en) * | 2013-12-19 | 2014-04-30 | 天津工业大学 | Bipolar three-dimension electrode coupling treatment device for treatment of non-biodegradable organic wastewater |
| CN105016431A (en) * | 2015-07-23 | 2015-11-04 | 王麒钧 | Method and apparatus for removal and recovering of heavy metal ions from wastewater |
| WO2017054256A1 (en) * | 2015-09-29 | 2017-04-06 | 北京大学 | Method for recovering oil contamination by means of carbon nanotube sponge and electrically controlled oil displacing technique |
| CN105523625A (en) * | 2016-01-15 | 2016-04-27 | 济南大学 | Water purifying system for silver-plating wastewater and water purifying method |
| CN106115865A (en) * | 2016-08-25 | 2016-11-16 | 苏州市水知道环保科技有限公司 | Electrolysis feed arrangement |
| CN107162119A (en) * | 2017-06-23 | 2017-09-15 | 湘潭大学 | A kind of method and apparatus of complete mixing flow waste water three-dimensional electrolysis |
| CN111112324A (en) * | 2019-12-20 | 2020-05-08 | 清华大学 | Organic pollutant treatment device and equipment in soil and underground water |
| CN114054484A (en) * | 2020-07-31 | 2022-02-18 | 中国石油化工股份有限公司 | Permeable reactive barrier and method for repairing polluted underground water by permeable reactive barrier |
| CN114054484B (en) * | 2020-07-31 | 2024-06-07 | 中国石油化工股份有限公司 | Permeable reactive barrier and method for repairing polluted underground water by same |
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Application publication date: 20121219 |